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2b. Wetland setback Variance 6921 Yuma Drive (2. C ITY OF C 690 COULTER DRIVE • P.O. BOX 147 • CHANHASSEN, MINNESOTA 55317 I (612) 937 -1900 • FAX (612) 937 -5739 1 1 MEMORANDUM TO: Board of Adjustments and Appeals ' Mayor and City Council FROM: Sharmin Al -Jaff, Planner I 1 DATE: January 20, 1993 SUBJ: Variance Request #92 -13 for a 49 foot Wetland Setback Variance and a 30 foot front yard setback variance for the construction of a Single Family Residence, 6921 Yuma Drive 1 On January 11, 1193, the Board of Adjustments and Appeals tabled action on this application 1 (Attachment #2). The applicant requested a 49 foot wetland setback variance and a 0 foot setback from the front property line for the construction of a single family residence (Attachment #4). The Zoning Ordinance requires a 30 foot front yard setback and a 75 foot ' setback from the edge of the wetland. The Board members did not feel comfortable with the location and the type of soils on the parcel. They commented that they believed the foundation will not be stable and wanted to deny the variance. Staff was directed to prepare findings of fact in order for the Board of Adjustment and Appeals to deny this application. Attachment #3 reflect the Findings of Fact prepared by the City Attorney. On January 15,1993, the applicant submitted a report from the Geotechnical Engineering Corp. prepared on January 25. 1989 (Attachment #3). This report indicated that the soils are suitable for building provided that the lowest floor slabs of the house be at least four feet above the water table. This can be accomplished by designing a house with a walkout design rather than a basement and by bringing in fill. It should be noted that the report was based upon an earlier home design being proposed by another party. It is not tailored for the current request although similar recommendations are likely to result. Staff is aware that the requested variances and proposal to build on this parcel is causing a good deal of neighborhood concern. We empathize with the situation and agree that a significant portion, if not all of the lot is wet on a constant or intermediate basis. We agree � 07 PRINTED ON RECYCLED PAPER .1 1 Board of Adjustments /City Council January 20, 1993 1 Page 2 many have some value to the city in providing room for a ponding area for a water quality ' and retention basin that would fit into the system and that ultimately protects Lotus Lake. Staff has prepared a report to the City Council on this matter for consideration at their January 26 meeting. The Board may wish to continue action on the matter to allow the City 1 Council time to consider public acquisition. Staff continues to recommend that the Board consider granting the variance for reasons 1 outlined in our January 11 staff report with conditions outlined below. Should the Board wish to deny the variance request, we have asked the City Attorney to prepare a Findings of Fact which follows this report. RECOMMENDATION 1 Staff is recommending approval of Variance #92 -13 for a 5 foot front yard setback and a 31 foot wetland setback with the following conditions: 1 1. The applicant maintain a 15 foot setback from the center of the watermain located in Yuma Drive. 1 2. The applicant shall reduce the depth of the deck to 10 feet to minimize impact on the wetland. 1 3. The applicant shall submit a tree preservation plan prior to issuance of a building permit. 1 4. Type III erosion control be maintained during the construction season along the edge of the wetland. 1 5. No additional construction is permitted without a variance application. 1 6. The applicant shall enter into an agreement with the city providing for private construction and maintenance of the driveway in public right -of -way. 1 7. The applicant shall retain a qualified soils engineer to evaluate the site for the proposed structure. 1 8. The applicant shall retain a structural engineer to design the foundation if soil conditions are such that a conventional foundation would be deemed inadequate. 1 9. A drainage plan shall be submitted for approval by the city prior to building permit issuance. 1 1 I Board of Adjustments /City Council 1 January 20, 1993 Page 3 1 ATTACHMENTS 1. Findings of Fact. 1 2. Board of Adjustments and Appeals minutes dated January 11, 1993. 3. Geotechnical Engineering Corp. report for the lot. I 4. Staff report dated January 11, 1993. 1 1 1 1 1 1 1 1 1 1 1 1 1 1 01%20%93 14:47 $612 452 5550 CAMPBELL KNUTSON 44-> CHA 's, CITT HALL 1 j 002405 1 CITY OP CHANHASSEN CARVER AND HENNEPIN COUNTIES, MINNESOTA IN RE: Application of Shannon T. Terry for a 49 foot wetland setback FINDING OF FACT variance and a 30 foot front yard AND DECISION setback variance. On January 11, 1993, the Chanhassen Board of Adjustments and ' Appeals met at its regularly scheduled meeting to consider the application of Shannon T. Terry for two variances to allow construction of a single family home on approximately 84,000 square feet of property. The board conducted a public hearing on the proposal preceded by published and mailed notice. The ' applicant was present. The Board heard testimony from all ' interested parties wishing to speak at the meeting and now makes the following Findings of Fact and Decision: ' 'XNDINGS OF FACT 1. Section 20-58 of the Chanhassen City Code delineates the standards for granting a variance: • ' A variance may be granted by the Board of Adjustments and Appeals or City Council only if all of the following criteria are met: a. That the literal enforcement of this Chapter would cause undue hardship. "Undue hardship" means the property cannot be put to reasonable use because of its size, physical surroundings, shape or topography. Reasonable use includes a use made by a majority of comparable property within 500 feet ' of it. The intent of this provision is not to allow a proliferation of variances, but to recognize that in developed neighborhoods pre- , 01.20%93 14:48 '8`812 452 5550 CAMPBELL KNTJTSON 4-44 CHAN. CITT HALL 2003%005 1 existing standards exist. Variances that blend with these pre - existing standards without departing downward from them meet this criteria. b. That the conditions upon which a petition for a variance is based are not applicable, generally, to other property within the same zoning classification. c. That the purpose of the variation is not based , upon a desire to increase the value or income potential of the parcel of land. d. That the alleged difficulty or hardship is not a self- created hardship. e. That the granting of the variance will not be ' detrimental to the public welfare or injurious to other land or improvements in the neighborhood in which the parcel of land is located. f. That the proposed variation will not impair an adequate supply of light and air to adjacent property or substantially increase the congestion of the public streets, or increase the danger of fire, or endanger the public safety or substantially diminish or impair property values within the neighborhood. 2. The property is zoned RSF (Single Family Residential). ' 3. The applicant proposes to construct a single family home on Carver Beach Lots 2919 -2943 and Lots 2877 -2897 ( "subject property"). The subject property is approximately 84,000 square feet. The minimum lot size in the RSF zoning district is 15,000 square feet. A protected wetland exists on the subject property. , 4. The proposal requires a wetland setback variance from Section 230 -409 of the City Code. ' 5. The proposal requires a front yard setback variance from Section 20 -615 of the City Code. r t -2- 01.20/93 14:49 $612 452 5550 CAMPBELL KNUTSON 444 CHAN. CITY HALL Z004/005 6. The applicant's proposal, if approved, would result in a front yard setback of zero (0), and a wetland setback of twenty - six (26) feet. 7. The applicant's proposal would require access to the subject property via a private driveway constructed in a public right of way. This would create a liability problem for the ' City. 8 The applicant's proposal would result in the structure ' being located within ten (10) feet of the watermain, which is an insufficient distance to allow proper maintenance and repair of the watermain. 9. The applicant has the burden of showing what is a reasonable use of the property. The applicant has failed to demonstrate that it is feasible to construct a single family home due to the existing soil conditions, wetland, and drainage ' conditions existing on the subject property. 1 10. The subject property may be put to reasonable use, such as recreation, picnicking, hiking and camping. ' 11. The average minimum front yard setback of homes within five hundred (500) feet of the subject property is twenty (20) ' feet. All homes within five hundred (500) feet of the subject property meet the seventy -five (75) feet wetland setback. 12. The conditions upon which this application is based, to wit, a protected wetland, are applicable, generally, to other property within the RSF. 13. The purpose of this variance is to increase the value of the subject property. -3- 01.20.93 14:49 $612 452 5550 CAMPBELL KNU'TSON 4.94 CHAN. CITT HALL Z005 005 I 1 14. The granting of this variance would be detrimental to public improvements (i.e. the existing watermain) in the 1 neighborhood. 15. Granting the variance would create a traffic safety problem if the platted roads were improved, since the proposed 1 driveway lies in the public right of way. 16. The zero (0) front yard setback would diminish or impair 1 property values within the neighborhood. DECISION The application of Shannon E. Terry for two variances is 1 denied. Adopted this day of , 1993. 1 CHANHASSEN BOARD OF ADJUSTMENTS AND APPEALS BY: ' Its Chairperson ATTEST: BY: 1 Its Secretary 1 1 1 1 1 -4- 1 1 CHANHASSEN ZONING BOARD OF ADJUSTMENTS AND APPEALS REGULAR MEETING JANUARY 11, 1993 Chairman Johnson called the meeting to order. ' MEMBERS PRESENT: Carol Watson, Willard Johnson and Don Chmiel STAFF PRESENT: Paul Krauss, Planning Director; Sharmin Al -Jaff, Planner I; Steve Nelson, Building Inspector; and Elliott Knetsch, City Attorney FRONT YARD SETBACK VARIANCE AND A WETLAND SETBACK VARIANCE FOR THE ' CONSTRUCTION OF A SINGLE FAMILY RESIDENCE ON PROPERTY ZONED RSF, RESIDENTIAL SINGLE FAMILY AND LOCATED AT 6921 YUMA DRIVE, SHANNON TERRY. Sharmin Al -Jaff presented the staff report. Chmiel: What type of soils are there Steve? Do you want to come up to the mic. • ' Nelson: Attached you'll find a copy of the Carver County Soils survey and most of them are glencoe silty clays, soils. Organic, very wet. Poorly drained soils. Marsh, which again is usually typical to lowlands. It may be unsuitable but corrective measures can be taken sometimes by use of pilings. Surcharging with clean fill. Brining back oversizing building pads, that type of thing. It's possible that it may not be cost effective but it's something that we'd like to have at least a soils engineer take a look at the soils. Would recommend that at the building excavation. Johnson: Do you have any idea how deep it is? Nelson: Not really. It's real difficult to say because you may have an ' organic layer a couple of feet, 3 feet, maybe 4 feet and underneath that you're going to have a very saturated gray clay which is also considered soft. So a soils engineer would take a look at that and determine, maybe sizing up the width of the footings, that type of thing. We have no idea without an actual soils engineer going out and taking some borings. Watson: One of my questions and I'm sure no one here can answer is how in heavens name did this become a lot of record? I mean where was the building pad when we allowed this subdivision? Where did they think they were going to put the house? ' Al -Jaff: I don't know. Watson: Because even what's considered buildable back there is not dry. I mean it's not like. Al -Jaff: Our guess is whoever approved the subdivision didn't. Krauss: You go back to the original platting of Carver Beach in what, the 1920's where you have the Star and Tribune giving away lots for selling newspaper subscriptions and this was all platted then and frankly. Watson: Yeah, but this was divided up. 1 1 Board of Adjustments and Appeals January 11, 1993 - Page 2 1 Krauss: It was redivided .I think in the early 70's, if I remember right' Was it later than that? Watson: '84. '84 we split it up and left this very large piece. I mea I don't know if the assumption was made because it's a large piece, it w buildable or what. But I'm a little puzzled as to how something like th ever becomes buildable and I hope that it wouldn't happen now. Krauss: Well I honestly don't know. I mean the City had no maps. We ' only had topographic maps done in '89. So I'm not sure how they would have known how they were going to do it. Yeah, it is an unfortunate situation. Johnson: This is a considered a lot of record? Krauss: It's a lot of record. Johnson: I was going to say, we've got a lot of outlots... , Watson: Has sewer and water been paid on this? Al -Jaff: It was assessed for it. I don't know if it's been paid or not' Watson: So we don't know that any sewer and water charges have ever been collected or paid? 1 Al -Jaff: No, but that's something that they will pay at the time of. Watson: Right, but nothing has been paid? ' Johnson: It's never been assessed. Watson: Has not been assessed? Al -Jaff: I can check into it. ' Watson: It's becoming increasingly difficult to get these lots of record which are not buildable and come in here and then they want a variance t put them into something buildable. That one on Pleasant View Road will the bain of my existence as long as I live in the city. I hate to see that continue to happen. I don't know. I can't see building on this piece of ground. There's nothing back there to build on. There's no la to build on. And I don't know what the City's position on buying it wou be. I know we don't exactly have cash lying around to buy up wet pieces of ground. 1 Chmiel: You're right. Watson: But I can't honestly in good conscience say that I would recommend that they build anything on this lot. Because I don't think t house is going to stay put. Or it's going to have water or there's going to be problems with this structure one way or another. And it's all goi to come back to us. I mean someone someday down the line is going to sae you gave me a permit. That must mean you thought that we could build Board of Adjustments and Appeals January 11, 1993 - Page 3 here. And I'd hate to have my name wearing that confusion. Saying that Y 9 hat I actually believed that somewhere along the line. Krauss: Well, your reservations are I think well founded. We share the same sentiments as does our inspections department. We've learned over the years that virtually anything is fixable if you throw enough money at it. I'm not sure if that equation balances in this case or not but it's clear that no permits will be issued until the soil work -up is done by a soils engineer and is properly corrected. At which time that engineer has some liability for what happens. I don't know what else we could do. I mean we have an educated buyer. They're certainly aware of the situation. ' Johnson: I had a concern and a neighbor over there called me just before I left home and he says, do you realize what happens when we get a 3 inch rain? ...walked it a couple years ago and it came up...and the year I walked it there was water standing. And that wasn't after a big rain. That was just on a normal...and I've got problems with that too. Saying geez, that dumb board gave us a permit and the house is tipping over... ' dumb board gave us a variance to build and I saw it here a number of years ago. Somebody in Chanhassen...built a home on the end of a cul -de -sac and the water was running through their garage and they blamed the city for that. I don't feel that was the city's fault at that time and we didn't grant no variance on it. I'm just giving a for instance. There was water running through his garage and out the back and he blamed the city because he had a house there. Watson: The bottom line is always right here in this building. Krauss: Well I don't deny that Carol. I'm one of the people that's get those phone calls. I think the best we can do is try to let the buyer beware and try to educate the buyer. Variances have to be filed against the property. Is there a way of putting some concerns in the variance that's filed? Elliott Knetsch: Well you know both Carol and Willard, you're both making ' points about is the city incurring some potential liability by issuing these permits or variances and cities were faced with that problem. Within the last couple of years the State Municipal Court Liability Act was changed. Now there's a specific State law that says, you can't sue us because we issued you a permit. All we're doing here is saying, yes you can have a building permit. We're not saying it's a good place to build a house. We're simply saying your plans and your specifications for your house meet the building code. We're not saying that you have a wet basement or you won't have water running through your garage. You as the buyer and your engineer and your staff have to make those decisions for ' you. This case is slightly different than that because it's not a building permit. It's a variance but we're caught in a position where it's a lot of record and you don't really have a choice, as I think staff point out earlier. So the mere fact that we give them a variance I don't believe opens us up to liability. I think we would be immune from a lawsuit for something like that. Watson: I'm concerned about more than a though because I mean I live within a mile of this place the entire 46 years of my life. I hate 1 1 Board of Adjustments and Appeals January 11, 1993 - Page 4 to be embarrassed literally by the fact that things are being done that II really shouldn't be done. And we're always stuck between a rock and a hard place with these lots of record and we have. to bend over backwards repeatedly because something, we have to allow something to be done on ail lot where it shouldn't be allowed to be done. It shouldn't happen. Elliott Knetsch: It's a question of funds you know. If we had a fund i existence and we were putting a little something in each year to acquire properties where it makes sense, like maybe it does with this one, that' be one thing but unfortunately, we don't have that sort of a fund. Watson: It's a luxury we're not in possession of right? 1 Elliott Knetsch: Right. Chmiel: I get rather hesitant with some of these because right now we have a suit that's initiated against the City in something not quite as similar but close. And it's probably not from that existing property II owner coming in. It's the second removed property owner now coming in, and I don't like to see that done only because of the fact that no one really wins in that particular situation. But they do want to sue us. I does cost the city money and I don't like spending that money. Because the only ones that really come out of it, Elliott is you know who. The attorneys. And normally it gives me a lot of real deep concern with it. I know that we have a few other things here too with that variance. The setback requirement for a 20 foot deck, as you mentioned. Cutting that back down to 10. We're also into the wetland with not the proper setback requirements with that as well. I think that the buyer should be aware ir the fact that if the soils are going to need removal, it's a very costlyll effort. We don't know what the depths are because it could be 2 feet, it could be 3, could be 5, could be more. And this position of that problell in itself plus the fact of bringing fill back in, cost really gets up there. And still whether or not it would be a buildable and a viable buildable lot, that's another question. So I have some real concerns wi that. That part of it. Wetland, as I say, is going to be what, 30 feet back as opposed to 75? Al -Jaff: 31. Chmiel: 31. Watson: And in reality, it's right there. 1 Chmiel: Wetlands are something that we do protect within the city and have done for a period of years. Only because it's the best thing to II really do. Watson: And this one's really working. I mean this one's working for Lotus Lake. It is truly filtering. The vegetation is natural. I mean 11 it's there actually doing the job that needs to be done for a lake that's already in danger. It's just a nice, natural. Johnson: There is severe runoff from those big hills you know... 1 1 Board of Adjustments and Appeals January 11, 1993 - Page 5 ' Watson: And it is really wet. Holds a lot of water. Johnson: My concern is too, it gets wet down there normal. You can't tell now but in the summertime when I walked it, it was wet under normal. We haven't had real wet summers for quite a few years now. We've had sure some outbursts of rain but under severe conditions. Al -Jaff: I've been out there when it... Chmiel: I'm just wondering whether the, I'd like to get some input from the applicant too. Some of the concerns maybe... Johnson: Do you wish to speak? 1 Dave Hamlin: Yeah. My name is Dave Hamlin. Chmiel: Could you come up to the microphone so we can. Dave Hamlin: Oh sure. My name is Dave Hamlin. I work with LDK Builders. We're the builders who's going to be, hopefully building the proposed structure on that particular lot. A couple questions that I have for you guys. Number one, I'm a bit confused because at this point in the process, and Shannon who's the actual applicant and correct me if I'm wrong, we're not trying to ascertain whether or not the lot soil condition is buildable and as is cond'ti ion. This is a two part process. Number one, we have a problem. We don't know if that soil is going to bear that structure. Number two, we have the problem of the edge of the wetland and the setbacks creating a lot that is in essence unbuildable due to setback requirements. We're not making any representations here tonight or trying to figure out if the soils are good. You guys have jumped one step in the process here it seems to me in asking the question. Watson: We have to. 11 Dave Hamlin: Well I understand that. Here's our point. The first step is to find out if the city will allow a variance that will allow those lines to be drawn on that survey that would create a possibility of building a home. Then the next question after that is, if it's possible that the city will allow this structure to be built there, does it make sense to build it there? The buyers aren't going to want to live on a lot with their house sinking into the ground. We, as a builder, who participate in the Minnesota Statutory Warranty Coverage and are insured by the Home Buyers 210 Warranty Program, aren't going to,want that situation either. If we go out there and spend $600.00 and $1,200.00 to ' do soil borings for our own information and find that that lot is a piece of crap, then at that point we can make one of two decisions. Number one, to walk away from it and that's a provision that's built into the purchase agreement between the applicant and the current owner. The seller of the lot. Or we can choose to, as you say, throw money at the situation and try to correct it. I don't think we're going to be interested in pounding down pilings out there. I can't see the applicant choosing that course of action. I mean you're going to be running into tens of thousands of dollars to correct that lot. Again, I guess I want to ask you, why is it that you're jumping this one step in the process ahead of just simply 1 1 Board of Adjustments and Appeals January 11, 1993 - Page 6 1 saying, okay. We're looking at this and yes. We could set back this proposed structure 10 feet from the one. 5 feet from the front and deal' with the wetlands issue and then require the building department to have us evidence to them the fact that we can build this structure on the lot and make sure that it doesn't disappear into the ground. I guess that's what we're trying to establish here. The reason, you know you may be asking in your own mind, why didn't you do it the reverse way? Well I'll tell you why. Because it'd be senseless to pound $1,200.00 worth of soil' surveys out to an engineer only to find out that the City won't grant till variance. That's money flushed down the toilet and we chose this course of action first. Another quick question before you. Chmiel: Yeah, but that's a condition. That's one of the things that I mentioned in the first place. Is I didn't feel the variance was warranted to do this because all the rest of this hinges right back to i1 Dave Hamlin: To the soils? Chmiel: That's correct. And my concerns were those specifics. We, rig now have another situation occurring whereas you as a builder have to provide the owner the rights that there's nothing wrong with what's existing. We have another suit happening within the city right now whereas the builder is not solvent any longer and is not able to take care of the cost to do the rennovating and put it back to where it was in thell first place. So I guess I have a few different concerns with that. And di concern there again is, the city is being brought into that suit. We have to defend ourselves and I don't like spending our money for those specifics, and that's the first reason that I have. And that will be my number one objective. To eliminate the problems that could be incurred because of conditions or whatever might be on that particular site. Dave Hamlin: Okay. Just to address that briefly. Number one, the situation that you have with the builder that you're dealing with is the result of the fact that that builder is not participating obviously in all HOW or a 210 Warranty, is that correct? Well, there is a major difference. If the builder's insured by a warranty program and the builder goes insolvent 60 days after the closing, it doesn't matter. Th structure warranty exists in place for a period of 10 years and even is transferrable to a new buyer. I don't know if you're aware of that type of thing that goes on. And we would be putting that type of warranty on it, but I understand the concerns that you guys have about it. I guess II the only thing that we can say is that, we've tried to figure out how to go through this process and this is where we chose to start the process. Is to find out if we can get a variance dealing with these lines on pape and not dealing with the dirt because we don't know the dirt until we punch holes. And if the city wants to, if you would feel more comfortab e setting specific requirements on us providing evidence that this soil is really buildable, that's not going to be a problem for us because we want to know it for ourselves as well. And if we get in there and find out it's crap, we're not going to build on that lot, but. Chmiel: I'm sure you've looked at that lot Dave. 1 1 1 Board of Adjustments and Appeals January 11, 1993 - Page 7 Dave Hamlin: We have but I have to tell you honestly, we have done no soil tests whatsoever. We've gone to the trouble of surveying it to provide the data that you guys need. I am also a little confused by one thing. We met with(Jo Ann out of your department there at the city and I'm sorry, I forget her last name. And it was explained to us somehow that the setback requirement is not 75 feet but is in fact a total of 60, and that's an average setback. And I guess I'm a little confused how it went from 60 to 75. Krauss: If I could. Jo Ann was referring to a new wetland ordinance that we adopted a few months ago. If you're platting new lots today, there is a decreased setback requirement on the new lots. In exchange for that you've got to set aside a buffer strip around the wetland with native vegetation. And that's got to be monumented and then we have setbacks for structures beyond that and it comes out that you have a little more flexibility with a decreased setback. But the ordinance also provides that if you have a lot of record, a pre- existing lot, which is most of the city that's been platted to date, then the standard of 75 feet is still enforced. Dave Hamlin: Okay, that isn't quite how it was explained to us and that's how we proceeded to come up with this proposal actually. Krauss: No, that hasn't changed in this context. Johnson: Dave, and I don't feel...jump the issue because once we grant you the variance, the variance has been granted. Correct me if I'm wrong, but we've got to look into all the aspects like the Mayor mentioned. If we're granting you this variance, there's all the things associated to go ahead with it. Watson: We're saying it is if we grant the variance. Johnson: That's right. Watson: We're saying it's okay. Dave Hamlin: To build that house on that lot? Watson: That's right. And so when we say that, that's kind of unnerving when we feel the house may sink into the, we can't be assured of the soils or that those, I mean. Dave Hamlin: Don't we have to, as part of the application process for the building permit, if it's not an engineered building pad, we have to give ' evidence of what's under there per a soil engineer test. I mean that's part of the, I mean the building permit can be denied based on what the bearing capacity of the soil is. Nelson: Right. We won't necessarily deny the permit itself... (In speaking from the audience, his comments were not picked up on the tape.) ' Watson: There's two of them, two houses just over in Shorewood from me that they installed...and they're working on one now, and they were both 1 1 Board of Adjustments and Appeals January 11, 1993 - Page 8 '' put in the lake as far as I'm concerned and one I saw the basement fall in. 18 courses of block and I just feel that...I can't give my approval on something that I feel personally...I just don't feel comfortable with that. Steve Nelson made a comment from the audience. Johnson: Shannon, did you want? ' Shannon Terry: Well I'm not sure exactly what I'm going to add to what Dave has said basically but I feel I have the same concerns that Dave hall also. We don't intend on investing all of our money into a home that's II going to fall into the ground either. And this will be our second home. We live right now in Hopkins. We just sold. We're going to be moving pretty soon with the hopes of building somewhere in Chanhassen. We like this area. This land became available. It came up on our realtor's lis We came and looked at the lot. Again, we really began looking at the lot in the fall. The leaves were on the ground. Again, there were no soil li samples done at that time whatsoever so we're really, again what we did we basically came to the city and asked what process do we have to go through to where we can obtain this land and get building on this land. And it was told that we needed to go through the variance process first.' Upon that, coming to a success, then you go to the soil samples. So I'm not sure what more I can add but I guess it's just that, first of all I' unaware of, obviously because I don't live in this area, of the conditio of the land first of all. And secondly, I guess we need to find out fir of all if we meet the requirements of the city first of all for setbacks and positioning of the house first of all. We've done basically almost II everything we can to the home to make sure it meets those requirements. We've reversed the plan. It was going to be a full walkout. Due to the slope of the lot from front to rear elevation, it is a split level home. But it's going to be built basically into the ground. It's going to be,' as far as I know, the whole bottom of the exterior of the home in the rear is going to be exposed. I believe we're just going to be just pushing u fill to accommodate the front portion of the home. So I don't believe it's going to be building very deeply into the soil. We had some information supplied by a survey that basically said that the elevation of the wetland was at a level of 929 feet. And determined the area of the II wetland and maintaining the 2 feet above that level of the wetland, we would meet that basically with the digging of the small foundation we need to supply for the home. So I guess so far as we're concerned, it seems like we're meeting everything that we can so far. Obviously we have a problem with the size of the home for the wetland area itself. Looking some of the other homes, one of the drawings that Jo Ann had given to us before, when we came in to meet with her for the variance request, anothi home that was proposed to be built on the lot was quite large. It was a very large L shaped and would obviously not fit. At that time we were told basically a future house is a little more in line with the size of property. Things may go a little more smoothly but again, we weren't aware of the wetland level of the property at that time, but. Janis Schultac: I'm Janis Schultac and I'm representing Joe Martin who' out of town, who's the owner of 6911 Yuma who would be on that property' left. And when he bought the property, and I have lived there right now 1 Board of Adjustments and Appeals January 11, 1993 - Page 9 for over a year so I can tell you some things about standing water and flooding. Not on our property but where Woodhill and Yuma meet, there's always standing water Oiere when it rains. And sometimes it gets to the point that if we didn't have our Forerunner, it gets very difficult to get through that water and we have stalled. Also, where that property, where the pavement...to that wetland area and we're afraid that if there was to be some buildings there, our property there built that, it would cause additional flooding in that area because where would the water go? It would probably go into that property. We do have the, there's a pond out back of the property and I think it's on, would be on that. land. I'm not sure and that does get pretty filled and is constantly wet. Even when it ' was pretty dry this summer, it was always water in there. I'm pretty sure, I can't quite for sure but he did look at purchasing that land in hopes that nobody would build and that if it was buildable, later on he could sell the house and then sell the land right next to it. He did have it tested. I'm pretty sure he told me he had it tested. This is based on our phone coversation last night from San Diego. And that it would cost a lot of money to do pilings or something. I'm not real knowledgeable on ' all this terminology. And that it wasn't worth him purchasing it or else he would have bought it 3 years ago. Currently his house is totally paid for so he does have the funds to buy it outright. This spring we did discuss buying it. We looked into it again and it just wasn't worth buying because it was unbuildable. Because his builder did tell him at that time or they did do testing that it was not, but don't quote me. It's not for sure because he's not here to tell you. He's in an airplane right now on his way home. When he did buy the property, he was told that to the right and to the left of him, no one could build because the property wasn't buildable due to city ordinances and he was pretty ' surprised when they put a house next door to us onto the right because he did not have the chance to come and give his little speech. And they were granted a variance and they did build and their house is on 8,000 square feet right now but they're not affected by wetland or anything. But it did upset him because that was the reason why he bought the land to begin with. He feels that the City of Chanhassen has variances for a reason. Wants to know why they have the variances. What are the reasons and why ' are they so willing to change them and let people build when they're not meeting the city ordinances. My notes are real quick on the back of a paper here. Let's see, what else did he have to say. I think that was ' really about all. He does have more information. He was saying it so fast and it was way over my head so, but he just kind of wanted to give his two cents. So thanks. 1 Watson: The lot next door is another one of those lots of record? That variance on the other house that he's talking about was another lot of record...remember doing it. Now what? Johnson: I'd like to see a motion for denial. It's your choice. Watson: I make a motion to deny the variance for 6921 Yuma Drive, Lots 29 -18 thru 29 -43, also Lots 28 -77 thru 28 -97. Johnson: I'll second that. 1 1 Board of Adjustments and Appeals January 11, 1993 - Page 10 1 Watson: At this point time I'll just say, at this point in time that loll is not buildable piece of property. • Chmiel: That's truq. Watson: In it's present condition, it would not be buildable. Chmiel: Could we put an addendum to that? An addition that it should probably be reviewed by City Council too with potentially acquiring this property to use it as a drainage area. Therefore eliminate. Watson: Let's deny the variance and then let's make another motion that, the City Council look into, can we do it that way? So that we don't mix up the City's purchasing the property with the variance. Chmiel: I don't know if we can have two motions on the, counseler? Elliott Knetsch: Well, I think you can do it with two motions. Yeah, y can do the first motion. If you're signaling out the variance with the r reason for it and then secondly, you can. Johnson: Make a motion that the Council review it. 1 Elliott Knetsch: Right. Chmiel: Okay. 1 Krauss: Normal practice for us, if something is going to be denied is t ask you to continue it to get a findings of fact to support your denial. , For the record. Might that be adviseable in this case? In the meantime we can refer this up to the City Council? Chmiel: I would suggest that we table it then. Watson: Yeah. It shouldn't come to the Council as though we didn't do II it. Elliott Knetsch: What you ought to do then is to direct staff to prepay findings consistent with denial and then you can review those. Are you going to meet before the next Council meeting then? Well, we're suppose to act on the application within 15 days of the hearing. I think. Krauss: Our next Council meeting is on the 25th. Is this working days," well actually either way. Chmiel: You'd still have the proper amount of days until the next Council meeting. Watson: It would normally be working days wouldn't it Paul? 1 Krauss: It's 10 working days until the next City Council meeting. Watson: Wouldn't it usually be working days? 1 1 1 Board of Adjustments and Appeals January 11, 1993 - Page 11 Chmiel: Most of them are. Refer to those. Krauss: It's 14 days if you count them all. Watson: So we're okay, either. Johnson: I'll call for the question. Watson moved, Johnson seconded to deny the Front Yard Setback Variance and Wetland Setback Variance for 6921 Yuma Drive and directing staff to prepare a Findings of Fact to be brought back on January 25, 1993. All ' voted in favor and the motion carried. Watson: Now, if we want to direct City Council to look at it, that can be ' a separate motion. Chmiel: I don't know what we have for dollars, number one. ' Watson: Well let's finish this in 14 days. We can at that point, when we see it, direct Council if that's what we desire to do at that point. We don't have to do that tonight. Krauss: Well, you may want to. You may want to pass this on up. Chmiel: There's an opportunity, the point was made and I think you indicated that possibly the owner of that home now may be looking at acquiring that property. Have it all as part of one parcel. ' Janis Schultac: Well we looked at it but it was unbuildable. That's why we never bought it. Chmiel: Okay. But there's no intent. Janis Schultac: There was at one time. 11 Chmiel: Because of the buiidability on it but there's no, so you're not interested in it? Sometimes you might want that extra land just because you want extra land. Watson: Well I think this would be a wonderful thing to watch. I mean I bet there's wildlife and stuff around there. Janis Schultac: There's 4 deer...that live around here.. Watson: Oh yeah. The deer herd in this area is huge. I'm sure the wildlife is wonderful to watch. Johnson: Sometimes it's nice to have a buffer zone between you and the I neighbors. Dave Hamlin: You're talking about a piece of land that's owned by somebody that's been sold to somebody else. You're not talking about a 11 land that's sitting out there waiting for something to be done with it. The Terry's have a rider interest, a legal rider interest created in this 11 1 Board of Adjustments and Appeals January 11, 1993 - Page 12 land by a purchase agreement. I guess I'm kind of mystified why you're talking about other people buying it. This is the Terry's land. Chmiel: I was talking about the city acquisencing that. Just to take off the books so something doesn't ever happen on that piece of property Dave Hamlin: Who's going to pay the $9,000.00 in special assessments tit. are... Watson: That's the city's, it be owed the city anyway so the city wouldn't have to owe the city the $9,000.00. Isn't that part of what I occurs when the city purchases land? Chmiel: I think from a. ' Dave Hamlin: I guess why is the city choosing to take action now, now that there's a viable buyer who's talking about moving into your community. It seems suddenly this issue, this land has become valuable II simply because somebody else is interested in it. Chmiel: That's not the point. That's an assumption under your part. Johnson: I don't think the city feels it's any value. It's an eyesore. Watson: It's unbuildable. 1 A comment was made from the audience that was not picked up on the tape.. Krauss: It wouldn't be done today. It was done many years ago and it created a situation that we would have preferred not exist. The fact that it does exist, I don't know what else I can say about that. If you knew what we know today, we would not have allowed that lot to be platted. Watson: Our information gets better all the time. Krauss: Possibly too, in the interest of expediting it, we should have Findings of Fact for the next meeting and be prepared to take the appeal and the possibility of purchase to the City Council also at that same I evening. Chmiel: Yes. 1 Watson: So you want the motion to have the City Council,look into the purchase of the property? You want that now so that it can be ready? Krauss: I think it would be appropriate because to...this thing over 3 meetings really isn't. Watson: Okay, well I'll make a motion that. , Chmiel: It's not that we don't want you moving into our community. That not the point. We have some concerns with what's there. 1 I/ Board of Adjustments and Appeals January 11, 1993 - Page 13 Shannon Terry: I have just a couple concerns. First of all, I'm a little ' concerned that, first of all...is our realtor by the way. First of all, like she said, the property's listed...and then finding out that it's not even buildable whatsoever. Secondly, going as far as we have...that's a lot of time and money invested and we've got this far and... It's just really frustrating. It's gone this far. It shouldn't have gotten... Chmiel: That's the other thing that we're looking at. Potentially removing it out of that. And no longer having it as a buildable lot. Strictly as a drainageway. Watson: I made a motion that we direct the Council to look into the possible purchase of this property for use as a drainageway. Johnson: I'll throw a second on that. ' Watson moved, Johnson seconded to direct the City Council to look into the possible purchase of the property located at 6921 Yuma Drive for use as a 1 drainageway. All voted in favor and the motion carried. APPROVAL OF MINUTES: 1 Watson moved, Johnson seconded to approve the Minutes of the Board of Adjustments and Appeals meeting dated September 14, 1992 as presented. All voted in favor except Don Chmiel who abstained and the motion carried. Watson moved, Johnson seconded to adjourn the meeting. All voted in favor and the motion carried. 1 Submitted by Paul Krauss Planning Director Prepared by Nann Opheim 1 1 1 1 1 1 1 .MilhwmW IeideMBA!!!Ff MA MINltlFf'kit!!IFMPEaN1IS� �+ ��;ia�s�s�.: r:: r .._��.� 1 1 1 1 1 REPORT ON 1 SUBSURFACE EXPLORATION FOR RESIDENTIAL LOT 6921 YUMA ROAD CHANHASSEN, MINNESOTA 0 • 1 1 GEC JOB NO: 89 -21 1 Prepared for: 1 Ms. Marge Rossing 130 Cygnet Lane Long Lake, MN 55356 1 1 January 25, 1989 1 1 +�0Q1/IrN)II+OIbr____�Yflt • . 146411.Vailliirrhd4...li+igasp16' 1416 �1info AWKL.IL'. 1 C3EOTECH . • GEOTECHNICAL ENGINEERING CORPORATION Consulting Engineers • Soil Testing ' 1 January 25, 1989 Ms. Marge Rossing ' 130 Cygnet Lane Long Lake, MN 55356 ' Re: Subsurface exploration (GEC Job No: 89 -21) Residential Lot 6921 Yuma Road Chanhassen, MN 1 This is our report on the subsurface exploration program we recently ' conducted at the residential lot near Yuma Road and Wood Hill Road in Chanhassen. The report documents the basic results and our conclu- sions and recommendations. Please call us if you have questions about the report now or later on in the project. Very truly yours, ' Lawrence F. Feldsien, P.E. Vice President LFF /ck enc. II 1 • II r ' 1925 Oakcrest Avenue • Roseville, Minnesota 55113 • (612) 636 -7744 Annie Valley. Minnesota • (612) 431 -5266 -i lit ►i r 'mrr 'AY[+'f. l/q `rytamKCn..6~1•0...uvt.w1F} lir _ w 1 I il REPORT ON SUBSURFACE EXPLORATION 1 FOR RESIDENTIAL LOT 6921 YUMA ROAD CHANHASSEN, MINNESOTA II I GEC JOB NO: 89 - II I CONTENTS 1 I INTRODUCTION Scope and Purpose of This Report II Use of This Report Design and Construction Information 1 Criteria for Suitability of Subsurface Conditions FIELD WORK 1 Overview Limitations of Subsurface Exploration Field Sampling and Testing Methods II j Soil Classification Procedures. Sample Retention. 1 The Boring Log II SUBSURFACE CONDITIONS ENCOUNTERED IN THE BORING 1 Soils Ground Water II I CONCLUSIONS AND RECOMMENDATIONS Suitability of Subsurface Conditions for Proposed Construction II Recommendations for Corrective Earthwork and Design Bearing Pressure Recommendations for Continuing Geotechnical Services II CLOSURE EXHIBITS II Exhibit 1: Test Boring Information - Boring Location Plan II Boring Log Boring Logs: Abbreviations, Notations, and Symbols Boring Logs: Ground Water Information II Identification of Soils: Visual- Manual Procedures Geologic Terminology General Terminology II II REPORT ON SUBSURFACE EXPLORATION FOR 2 1 RESIDENTIAL LOT 6921 YUMA ROAD CHANHASSEN, MINNESOTA GEC JOB NO: 89 -21 INTRODUCTION Scope And Purpose Of This Report On January 19, 1989, Geotechnical Engineering Corporation drilled one test boring at 6921 Yuma Road in Chanhassen for the proposed construction of a single family residential house. The boring was made as part of a subsur- face exploration program requested by Paul Nelson of Merrill Lynch Realty and authorized by Ms. Marge Rossing, the property owner. This report: 1) outlines the design and construction information upon which we based our evaluation; 2) presents the boring log and information to help understand the log; 3) describes the soil and ground water conditions encountered in the boring; 4) discusses the suitability of subsurface con- ditions for construction; and 5) presents recommendations for corrective earthwork, a design bearing pressure for footings, and continuing geotech- nical services. Use Of This Report To protect the client, the public, and Geotechnical Engineering Corporation, we authorize use of this report only by the addressees and only for the purposes of designing and constructing the house. In addi- tion, even though this report is not intended to provide sufficient infor- mation to accurately determine quantities or locations of particular materials, we recommend (consistent with a policy of disclosure of - available information) that contractors be advised of the availability of this report. lir 1 GEC #89 -21 - Page 2 II 1 • l 1 I Design And Construction Information I Design and construction information for the house is quite limited. The 1 available design information is based on a conversation with Mr. Paul Nelson 1 and is preliminary. Our understanding of this information is stated below, I along with assumptions we made when specific information was not available. The conclusions and recommendations of this report may not apply if the II 1 building is not designed and constructed consistent with these assumptions and the available design information. 1 1 We understand that the building will: II 1 ° Be located in the general area of the test boring (the location of the test boring is shown in Exhibit 1). 1 1 ° Be one or two stories high (above grade). II I ° Have a full basement, with the lowest floor level at about elevation 93 it (i.e. about 4' below the present ground surface at the boring location). P- 1 57 1 ° Have relatively light foundation loads normally associated with single family residential construction. II I In addition, we have assumed that the building will: II 1 ° Be designed and constructed in accordance with standard procedures applicable to this type of structure. II 1 ° Be constructed in accordance with applicable building code requirements. 1 1 1 1 I/ I II 2 • GEC #89 -21 - Page 3 Criteria For Suitability Of Subsurface Conditions ' The suitability of soil conditions for construction depends on the compressibility and strength of the soil relative to the settlement and stability requirements of the structure. The weight of a structure (live load and dead load) and the weight of fill placed around and below a struc- ture puts pressure on the underlying soil. The underlying soil deforms (compresses) under this pressure, causing the structure to settle. In turn, settlement can cause cracking and other forms of distress in the structure. If the pressure on the soil exceeds the soil strength, the soil will fail and the structure will settle severely or even collapse. Soil conditions are considered suitable for normal construction if 1) unacceptable cracking or other distress is not expected to occur as a result of soil settling, or 2) the soil has an adequate factor of safety against failure under the proposed loading. Conversely, soil conditions are considered unsuitable if 1) the anticipated settlement is likely to be detrimental to the structure, or 2) the soil does not have an adequate fac- tor of safety against failure under the proposed loading. In terms of the position of ground water relative to proposed structures, ' conditions are considered suitable if the water table is below the lowest floor elevation of the proposed building and unsuitable if the water table is above the lowest floor elevation of the proposed building. When financing is arranged through the U.S. Department of Housing b Urban Development, the lowest floor slabs of the house must be at least 4' above the water table. The presence of a ground water table, or a source of water, is important in paved areas too because of the frost heave phenome- non. Freezing temperatures, the nature of the soils with reference to the soils capillary characteristics, and the presence and elevations of a ground water table are factors that contribute to the growth of ice layers in subgrade soils (i.e. the frost heave phenomenon). The heave associated with freezing, and the loss of supporting capabilities associated with thawing of the soil, can produce detrimental effects on bituminous and concrete pavements (and also on aggregrate surfaces). Some soils are more frost prone or frost susceptible than others. Generally, clean coarse sand or gravel are considered frost susceptible; on the opposite end of the spectrum, soils with a high silt content are extremely frost susceptible. GEC #89 -21 - Page 4 1 Various methods of design can be used to minimize the potential detrimental effects of frost heave (and thaw). Such methods could include insulating (i.e. protect the subgrade from freezing), draining (i.e. remove or lower the ground water table by installing drain tile, ditches, etc.), or replacing the frost susceptible soils with non -frost susceptible soils. It should be noted that the ground water table fluctuates depending on 1 seasons, precipitation, subsurface conditions, drainage, etc. Therefore, present ground water conditions do not necessarily represent the future or past ground water conditions. Even if subsurface conditions are con- sidered unsuitable for normal construction, structures can be built suc- cessfully if special design and construction procedures are used. Selection of the most feasible procedure depends not only upon subsurface conditions, but also upon economics and other factors (factors with which 1 we are not involved). FIELD WORK Overview ' Our work on the project included soil sampling and testing in the field and interpreting and analyzing the field data. In the field, our drill crew obtained soil samples, identified the soils geologically, and made ground water observations and measurements. We sampled one boring to a depth of 16 feet. The boring location is shown in Exhibit 1. The .number of borings and boring location was selected by Mr. Paul Nelson. The boring location was surveyed by measuring with a fiber tape. The elevation of the ground sur- face at the boring was determined using _a construction level with refer- ence to the basement floor slab of the house to the north of the proposed house. A temporary bench mark elevation of 100.0 for this reference point was assigned by us. The location and elevation of the boring should be 1 considered accurate only to the degree implied by the survey methods used. 1 1 il . GEC #89 -21 - Page 5 1 ' Limitations Of Subsurface Exploration The data derived through this sampling and observation has been used to II develop our opinions about subsurface conditions. However, because no exploration program. can reveal totally what is in the subsurface, con - II ditions between borings and between samples and at other times may differ from conditions described herein. The exploration we conducted identifies II subsurface conditions only at those points where we took samples or observed ground water conditions. Depending on the sampling method and frequency, every soil layer may not be observed, and some materials or I layers which are present in the ground may not be noted on boring log. l II If conditions encountered during construction differ from those indicated l by our boring, it may be necessary to alter our conclusions and recommen- dations and to modify construction procedures, and the cost of construction ' may be affected. ' The extent and detail of information about the subsurface conditions is I directly related to the scope of exploration. It should be understood, therefore, that additional information can be obtained by means of addi- 1 tional exploration. ' Unless actually observed in a sample, contacts between soil layers are estimated based on the spacing of samples and the action of drill tools. 1 Thus, most contacts shown on the log are approximate, with the possible 1 upper and lower limits of contacts defined by the position of the 1 overlying and underlying soil samples. Il il II Cobbles, boulders, and other large objects generally cannot be recovered from test borings, and they may be present in the ground even if they are not noted on the boring log. Other than as indicated by standard penetra- 11 11 II resistance values and by borings being obstructed, drilling and sampling methods do not permit us to form specific opinions about the pre- sence of boulders and other large objects, and none are stated in this report. In general, boulders and large objects commonly are in deposits such as coarse alluvium, uncontrolled fill, till, tumblerock, and weathered bedrock. 41 GEC 189 -21 - Page 6 Our conclusions and recommendations regarding design and construction do not take into account geoenvironmental conditions such as pollution and contamination. Environmental engineers or geohydrologists may be consulted for that. Field Sampling And Testing Methods 1 We used the standard penetration /split -spoon sampling method to drill the boring and to sample and test soils in the field. In this method, a steel split- barrel sampling tube is driven into the soil with a 140 -pound hammer dropped from a height of 30 inches (the hammer is dropped onto a rod attached to the sampler). The number of hammer blows required to drive the sampler tube 1 foot into the ground (after an initial set of 1/2 foot) is , recorded as the standard penetration resistance (N- value) of the soil for the sampling interval. When driving is complete, the sampler is retracted , and opened, and soil samples are taken from the tube. The bore hole is advanced between sampling intervals with an auger, casing, or rotary drill (with drilling fluid). When the ground surface is frozen, soil samples from the frozen zone are taken off the flights of the hollow -stem auger. Soil Classification Procedures. Sample Retention. Soil samples obtained in the field were returned to our laboratory and exa- , mined and identified by our project manager. The soil identifications were in accordance (generally) with the ASTM D2488 procedures as described in 1 Exhibit 1. We save soil samples for 45 days after sampling, then discard them -- unless we are requested to do otherwise. The Boring Log The typed boring log is presented in Exhibit 1. This typed log is based on our field log, observations of field samples, and the results of field tests. (NOTE: We keep a copy of the field log on file in our office for five years.) The meanings of abbreviations and terms on the typed log, along with general information on how the log was developed and how infor- mation is presented, are outlined on several sheets following the log in Exhibit 1. Read and understand this information in order to interpret the 1 log correctly. GEC #89 -21 - Page 7 The information on the boring log includes the estimated depth to boun- daries between soil layers, the geologic description and soil identifica- tion of each layer, ground water observations and measurements, and standard penetration resistances (N- values), and other information. SUBSURFACE CONDITIONS ENCOUNTERED IN THE BORING Soils The general soil profile encountered in the boring (from the top down) con- sists of surficial soils over basal soils. The surficial soils (top layer) are topsoil and are 2' thick. The basal (load - bearing) soils include till and coarse alluvium. Ground Water Ground water was measured at a depth of about 6.8' (corresponding elevation of 90) two days after completion of the boring. We emphasize that the ground water table fluctuates depending on seasons, precipitation, subsur- face conditions, drainage, etc. Therefore, present ground water conditions do not necessarily represent the future or past ground water conditions. CONCLUSIONS AND RECOMMENDATIONS Suitability Of Subsurface Conditions For Proposed Construction We conclude that the subsurface conditions are basically suitable for the proposed construction. This conclusion is based on 'the results of the boring, field tests, and the design and construction information. Recommendations For Corrective Earthwork 'And Design Bearing Pressure Remove all unsuitable materials from below the proposed building. At this site, the unsuitable materials are the surficial soils which were encoun- tered in the boring to a depth of 2 feet. In addition to the topsoil, vegetation, debris, roots, etc. should also.be removed. t � _ .rrrr 1 GEC #89 -21 - Page 8 1 To accommodate lateral stress distribution, oversize the excavation and fill outward to meet a 45° angle from the base of the building footings to basal soils (i.e. a 1:1 oversize ratio). Elevations of footings may be lowered to reduce the amount of excavation and fill needed to meet oversize requirements. Replace all excavated materials with controlled P tr lied fill to the proposed finished grades, compacting the fill to at least 95 percent of standard Proctor density. 1 For quality control, consideration should be given to having a geotechnical engineer present during earthwork operations to determine the suitability 1 of existing soils and the density of the fill. Use a design pressure of up to 2500 psf for footings placed on either fill 1 placed in accordance with our recommendations or basal soils. Recommendations For'Continuing Geotechnical Services For proper implementation of our previous recommendations in this report, 1 we also recommend that Geotechnical Engineering Corporation be: ° Retained before construction to meet with appropriate parties involved in the project (owner, architect, engineer, contractor, financial institutions, and so on) to explain geotechnical findings and to review the adequacy of plans and specifications relative to geotech- nical issues. ° Informed of any changes in the design information upon which this report is based. We should then be retained to verify or modify our conclusions and recommendations before - construction proceeds. /I ° Retained during construction to identify variances from predicted con- ditions, conduct additional tests as needed, and recommend solutions to /I geotechnical problems that are encountered. 1 11 GEC #89 -21 - Page 9 1 11 CLOSURE 11 Report Prepared By: 1/ ha 66/441\4* C r es W. B1sek Project Manager Under the Supervision of: i / - X44/ 11 awrence F. e Isien, P.E. M N Reg. No. 9103 1 1 1 1 • 1 1 1 1 1 1 1 1 1 1 1 1 GEOTECHNICAL ENGINEERING CORP. .,,,. 6921 YLkrna Road B9-2.1 1925 Oakcrest Avenue 7373 W. 147th Street SHEET NO. OF 111 Roseville, MN 55113 Apple Valley, MN 55124 (612) 636-7744 (612) 431-5266 CALCULATED BY DATE CHECKED BY DATE. 1 . , . , • 1/ i ' ■ ' ■ i I / . EgiOinj House 1 ' • ' ' 0 1 < i i• ; ; • ; I i i I 1 4 1 , ' i 0 I • i / • / 1 - r• ' , . i . . 1 cc E , 4 I ! * >••• ' , • ! I ' , • • Temporary Beftchma I WOOD HILL Basemen+ ROA flop DC 4exiStInj 11 .••■ _. .. : .• . hoi.se = 100.0 • . . 1 1 89 i A N IIII . . 1 —01571— . i v I d IIII No Scale- J BORING LOCATION PLAN 41 1 GEOTECHNICAL ENGINEERING CORPORATION 1 1 GEC JOB NO: 89-21 LOG OF BORING NO. 1 PROJECT: RESIDENTIAL LOT; 6921 YUMA ROAD; CHANHASSEN, MINNESOTA 1 I OE N H, SURFACE ELEVATION: 96 -R N SAMPLE FIELD & LABORATORY TESTS FEET IDENTIFICATION VOLOGY BPF MC TYPE REC. WC DEN L.I P _ L gli I ,_ Organic soil, black (OL /OH) TOPSOIL M HSA z- ■ 3 - 20 M SS 9 II 1 4- Lean clay with sand, light gray, mottled, (CL) 5- ' 10 M SS 14 1 6- 7- TILL II 1 Lean clay, gray, mottled, (CL) e 13 M SS 18 II 1 s- lo - Lean clay, gray, (CL) 1 with a waterbearing tense of 9 W SS 15 1 11- silty sand 12- 1 1 Sil sand, gray, fine grained, COARSE 13_ (SM ALLUVIUM 7 W SS 18 14- i 1 15 - Lean clay with sand, gray, (CL) TILL 9 M SS 8 II I 16 - END OF BORING 19 - 1 20 - r 2,_ 1 DEPTH DRILLING METHOD WATER LEVEL MEASUREMENTS NOTE: REFER TOII 0- 14 -1/2: 3 -1/4 "HSA DATE TIME S DEPTH D DEPTH DEPTH I FLUI LE EL LEVEL THE ATTACHED 1 -19 10:30 16 4 -1/2 14.5 wet SHEETS FOR AN I 1 -19 10:35 16 4 -1/2 12.8 11.2 EXPLANATION OF COMPLETED. 1 -19 -89 12:00 1 -19 11:35 16 4 -1/2 11.2 10.1 TERMINOLOGY CC: GN CA: JDF Rig: 55 1 -19 11:55 16 4 -1/2 10.1 9.0 ON THIS LOG 01 ' 01 BORING LOGS: ABBREVIATIONS, NOTATIONS, AND SYMBOLS 01 (Page 1 of 2) ill This list defines some of the abbreviations, notations, and symbols used on the boring logs. . I II A,B,H,N: Size of casing or core AC: At completion of boring CA: Crew assistant CAS: Casing ill CC: Crew chief CONS: One- dimensional consolidation test COT: Clean -out tube AI D: Sampled soil appears dry DEN: Dry density, pounds per cubic foot DM: Drilling mud or bentonite slurry ! FA: Power- driven flight auger; P- pulling procedures; S- spinning procedure HA: Hand auger HSA: Hollow -stem auger HYD: Hydrometer analysis LL: Liquid limit M: Sampled soil appears moist li MC: Column used to describe moisture condition of samples and for the ground water level symbol. 41 N (BPF): Standard penetration resistance (N- value) in blows per foot (see note #2 below) PAP: Paper plug ili PL: Plastic limit qp: Pocket penetrometer strength, tons per square foot ill qc: Static cone bearing pressure, tons per square foot qu: Unconfined compressive strength, pounds per square foot RD: Rotary drilling with fluid and cone -type roller bit REC: In split -spoon and thin - walled -tube sampling, the length (in inches) of sample recovered (see note #2 below). In rock coring, the length ill of core recovered (expressed as per cent of the total core run). REV: Revert drilling fluid III SA: Sieve analysis SR: Skid rig; non - rotary drill (skid- mounted) III 1 BORING LOGS: GROUND WATER INFORMATION (Page 1 of 2) 1 Ground water information is shown under "Water Level Measurements" at the bottom of the log and in the "MC" (moisture condition) column on the right side. Because the presence of water in the soil and the level of the I ground water table can change over time, the information presented is accurate only for the date and time the observations and measurements were made. The following information (in addition to the sampling date and time) 1 appears under "Water Level Measurements ": ° The sampled depth, which is the lowest depth of soil sampling at the time of the measurement. ° The casing depth, which is the depth to the bottom of the casing or hollow -stem auger at the time of the measurement. 1 ° The cave -in depth, which is the depth at which the measuring tape stops in the bore hole. , 1 ° The water level, which is the point in the bore hole at which free- standing water is encountered with the measuring tape. If free - standing water was not present above the cave -in depth, the word "wet" or "dry" in this column indicates whether soil adhering to the end of 1 the measuring tape appeared to be wet or dry at the cave -in depth. ° The drilling fluid level is similar to the water level, except that the liquid in the bore hole is drilling fluid. 1 The water level, drilling fluid level, and cave -in depths are measured with a weighted measuring tape. 1 1 1 BORING LOGS: ABBREVIATIONS, NOTATIONS, AND SYMBOLS II ( Page 2 of 2) il SS: Standard split -spoon sampler (steel; 1 -3/8 -inch inside diameter; 2 -inch outside diameter) 1 TW: Thin - walled tube (2" and 3" diameter) II VANE: Vane shear strength, pounds per square foot; 1-laboratory; F -field we: Water content, as percent of dry weight W: Sampled soil appears wet II WASH: Sample of material obtained by screening returning rotary drilling fluid or by taking a split -spoon sample of material which has collected inside the bore hole after "falling" through drilling fluid II WAT: Water • W {l: Sampler advanced by static weight of drill rod and 140 -pound hamper 1 WR: Sampler advanced by static weight of drill rod -200: Percent of material finer than 1200 sieve I 5 : Water level symbol 25: Diedrich Model 25 rotary drill (skid or truck - mounted) II 55: Central Mine Equipment Model 55 rotary drill (truck- mounted) 57: Mobile Drill Company Model 57 rotary drill (truck- mounted) 550: Central Mine Equipment Model 550 rotary drill (rubber tire- mounted) II NOTES: II 1. The size of drilling tools and related equipment is indicated by a number or letter. Examples: 1) a hollow -stem auger with an inside diameter of 3 -3/4 inches is shown as 3 -3/4 NSA; 2) a B size core barrel is shown as B core. I 2. In highly resistant material, the N -value (in the "N" column) may be shown as a "fraction," with an upper and a lower number separated by a slash (/) or a bar ( —). The lower number is the distance the sampler is driven, in inches (below the initial 1/2 foot set) and the upper 11 figure is the number of hammer blows to drive the sampler that distance (after the initial 1/2 foot set). Also, the length of sample recovered, as shown on the "REC" column, may be greater than the distance indicated I in the N column. The disparity is because the N value is recorded below the initial 1/2 foot set, whereas length of sample recovered is for the entire sampler drive. 1 ' 4 BORING LOGS: GROUND WATER INFORMATION (Page 2 of 2) The "MC" column indicates the moisture condition of soil samples. A "D" A D in the column means that a soil sample appears dry (absence of moisture, dusty, dry to touch); "M" means moist (damp but no visible water), and "W" means wet (visible free water). (NOTE: An isolated "W" at the top of the boring, over a column of "D's" or "M's" m�a+ be an indicator of recent thawing of frozen soil in the top layer.) The water level symbol in the "MC" column indicates the estimated P osi- tion of the ground water table in the boring. A water level symbol with a downward - pointing arrow means that the water table is interpreted to be at or below the level indicated. A water level symbol with an upward - pointing arrow means that the water level is interpreted to be at or above the depth indicated. The absence of the water level symbol on a log does not I necessarily mean that ground water was not encountered or that the water table or piezometric surface was not penetrated. Overall, determining the position of the ground water table is an interpre- tive process that depends on such factors as water level measurements, the presence and type of drilling fluid, the condition of samples, subsurface conditions, site conditions, whether the bore hole is covered or open, and weather conditions. Because of these factors and those noted previously, the actual ground water level in the field may vary from that shown on the boring logs. • 1 1 1 1 1 d ilt di . IDENTIFICATION OF SOILS (VISUAL- MANUAL PROCEDURE) i / 5'Xfln•s Weligrdd - - ►GW ♦• :15 % sand —t. Well aided si eves • r -- ..�,5 % ,.na —a- Wall grddraulwrth � Peorly ratted rGP --..,_ -- --►. 1s% sand —a. Poorly waded gravel / -- ` +_15% sand —0- Poorly rdd afoul worth and _•, Wall ruled -... -4. fines ML er MH - - GW -GM,.- • • . lb% sand - -In Well veiled veiled g and nod, sill GROVEL r � -- - - •� •` •n IS% sand or. Wall graded r worth gravel sal and sand % it vti > _ 10% fins < a 1 "'In flnw -C1. or CH ----. G W GC � — +. t5% sand — wall 51.dd 11111 *r11 clay %sand ` ►' 15 %sand ----O. W.II7rdd ravel worth cloy 111%1 and � .. Poo.w rdd -‘ - . 1.r»uMLaMH- - - ► GP• GM ;:15% .and - -lw Poorw Waded Irma *ilk ,11 ti N15% land — ... Poorly rdd gravid *Ill tilt and sand _ h•..s•CI or CH e. GP•GC� •• -.15% sand - -01 Poorly graded gravel wnh clay �`• >15% sand —► Poorly traded pawl will clay and ,and -__ - hne,•ML or PM - Gm .— •: --► 1S% sand — •y Silty pawl 1S % line; ..... ------ >15% ',and --or Salty gruel withsand ' - �-ur trna.•CL or CH--- -..GCi' _ ^.- - ♦ is % sand - -a- Clayey yawl _.� • 15% land —or Clayey ravel non sand r ^ �W.Il gr S W --a- - 15% revel —w W.11•graded sand ,5 % Imes +' �'' --- O.�15%ravel ---• Well grad.dYnd wishrival P / �'�►Poorly rdd— -- ► .SP�.�_ • 15 % F rain - - Poorly Waded land 15% ravel - -o- tootle In ailed sand week rand ��Imat•MIorMH— — .-SW SM - - _ -►• 15% revel -- W.Ilirdd sand wrlts WWI irrdd' — ---- _ 15'.: rant — Well pdd sand with silt and pawl $E ND � '-+ UnerCL a CH • -- - -+ S W Ci - -c— 15% gruel - --or W.Iliradd swill san swill clay --� 4 0 % sand _ 10% fines •• '+ _15% pawl -• -- w Wdlgrdd sand nnh clay and rend % valid ____________•.linw•MIo MH - - -- .SP•SM -- —►. %gravel — o- Poorly grddsand sulk WI '� � Poorly graded � ' t5% rani — Poorly 'bead sand with ,dl and gravel - +In., - se CH - ---- .-S P - + . - • 15% ravel Poorly rd«I sand w1 doe ' -01 1S% gravel --w• Poorly rdd sand weds clay and rand ill -__ Irnet•ML or MH .a. SM - .r-----------01 15% gr avel --o- Salty sand ;_15% 1, ., '� _ � w '•15% ravel — - Silty sand weth gravel - fines .CL. Of CH —. • w SC ----an • 15% rant ----sr Clayey sand t■ _ 15% p awl - - -• Clayey land week gravel • <30% plus No. 200 —• <15% plus No 200 • Lean clay 0 15.25% plus No. 200 - -► % sand 2% gravel - --0- Lean clay with sand CL % sand <% gravel — as- Lean clay with gravel % sand % of gravel <15% gravel —i Sandy lean clay ;30% plus No 200C X15% gravel --r Sandy lean clay with gravel `w• % sand <X gravel --► <15% sand — •--- -+ Gravelly lean clay ?15% sand - -► Gravelly lsen clay with sand <30% plus No. 200 • - -w- <15 % plus No 200 - -0-Silt III �► 15.25% plus No. 200 -- --a % sand >% gravel ---e. Silt with sand M L '----- % sand •% gravel — Silt with gravel % sand e% 01 gravel �•--► <15% gravel ----- . Sandy ells 230% plus No. 200 �� `'+' ? 15% gravel --dn. Sandy silt with gravel i� % sand <X gravel — ---r <15% sand - -+ Gravelly silt ---0 ... L15 %sand —� Gravelly salt with and <30% plus No 200 ----______--0. <15 f6 plus No. 200 Fat clay 15.25% plus No. 200 -+- % sand _X gravel —s as clay with sand C H —.lc sand •:% gravel —► pat clay with gravel rr ��.... % sand ?% of gravel <15% gravel w. Sandy fat clay >30% plus No. 200 >15% gravel --- —o- sandy fat clay with gravel % sand <% gravel <15% sand • • Gravelly fat clay z15% sand ► Gravelly fat clay with sand 1 .:"..30% plus No. 200 -....._ <15% plus No 200 — — =► Elastic silt •∎ 15.25% plus No. 200 % sand Gti gravel - -� Elegise M H % sa nd % grav ► El s tilt w with gravel sand j % sand 2% of gravel -- a <15% gravel -- +Sandy elastic silt k30% plot No. 200 - mow• 215% gravel e. Sandy elastic silt with gravel % sand c % gravel —i• <15% sand -- —a Gravelly elastic silt 0 .215% sand - -w. Gravelly elastic silt with sand I <30% plus No. 200 -- -► -'15% No. 200 200 5 OrgPn,c ganic sod 'SS _�� 1525S plus plus No. Z —� % sand % gravel 5 Or soil with sand OL /OH -- --.-x sand .:% gravel - -• Organic soil with gravel % sand 2% gravel ---- - <15% gravel 1. Sandy organic soil 111 >30% plus No 200 215% gravel ---w- Sandy organic soil with gravel 4 S sand <% gravel ___ <15% sand --iv- Gravelly organic soil Z15% sand --- ---0. Gravelly organic ail with sand I NorE- Percentages are based on estimating amounts of fines. und. and gravel to the nearest 5 `i. II GEOLOGIC TERMINOLOGY I The geologic description indicates the apparent depositional origin or II stratigraphic name. Geologic identification is interpretive and subject to error. II General categories of geologic deposits, and descriptive information is as follows: II ALLUVIUM COARSE ALLUVIUM: Sandy (and gravelly). Stratified. Deposited from fast moving waters in streams and rivers. (Includes glacial outwash.) II FINE ALLUVIUM: Clayey and /or silty. Stratified. II Deposited from slow moving waters in streams, rivers, lakes, and ponds. BEDROCK Wide range of characteristics: from hard, dense, II consolidated rock; to soft, compressible, and uncon- solidated soil -like material. FILL CONTROLLED: Compact, uniform material; inorganic; 1 no dehris. UNCONTROLLED: Loose or variable density. Mixture 1 of soil types. Often contains dehris and organic material. TILL Normally contains a wide range of grain sizes, from II boulders through clay. Usually non - stratified. Deposited directly from glaciers. II LOESS Silty. Non - stratified. Upper layer. Deposited from wind. II SLOPE WASH Organic and /or inorganic material washed from slopes and redeposited. i SWAMP DEPOSITS Peat, muck, and marl, and organic soil. Formed through accumulation of organic material under water. II TOPSOIL Contains hoth inorganic and organic material. upper, II i black layer of soil. Formed by weathering of inorganic soil and accumulation of organic material. I I TUMRLEROCK Dominantly gravel, boulders and rock slabs. Deposited from gravity flow down hills or cliffs. WEATHERED REDROCK Redrock which has been substantially weathered through 1 disintegration or decomposition. Texture and composi- tion grades into bedrock. I WEATHERED SOIL Texture, composition, and position is intermediate II between topsoil and non - weathered soil. 1 II il 1 GENERAL TERMINOLOGY NOTES FOR SOIL IDENTIFICATION AND DESCRIPTION Grain Size 11 • Term Size Boulders >12" 1 I Cobbles 3 " -12" Gravel 14 sieve - 3" Sand 1200 - 14 sieve Fines (silt & clay) <1200 sieve Stratification 1 1 Term Thickness Layer >1/2' 0 Lense 1/2" - 1/2' Lamination <1/2" I/ Fiber Content of Peat (ASTM 02607) Fiber Content Term (Visual Estimate) ill Fibric >67% Hemic 33 - 67% 11 Sapric <33% m Consistency and Strength of Fine Grained Soils II Unconfined Compressive Strength, psf N- value, (11 Term Very soft (Normal Range) <500 BPF <2 Soft 500 -1000 2-4 il Medium stiff 1000 -2000 4-8 Stiff 2000 -4000 8 -15 Very stiff 4000 -8000 15 -30 ill Hard >8000 >30 Relative Density of Coarse Grained Soils i Term N- value, BPF Very loose <5 Loose 5 -10 Medium dense 10 -30 Dense 30 -50 Very dense - >50 1 1 SYMPTOMS OF INNER PEACE 1 Be on the lookout for 'symptoms of inner peace.•The hearts of a great many have already been exposed to inner peace and it is possible that people everywhere could come down with it in epidemic proportions. This could pose a serious threat to what has up to now been a fairly stable condition of conflict in the 1 world. • Some signs and symptoms of inner peace: 1 • A tendency to think and act spontaneously rather than on 1 fears based on past experiences. • An unmistakable ability to enjoy each moment. • A loss of interest in judging other people. • A loss of interest in judging self. • A toss of interest in interpreting the actions of others. • A loss of interest in conflict. • A loss of the ability to wory (This is a very serious symptom). • Frequent overwhelming episodes of appreciation. 1 • Contented feelings of connectedness with others and nature. 1 • Frequent attacks of smiling. • An increasing tendency to let things happen rather than 1 make them happen. • An increased susceptibility to the love extended by others as well as the uncontrollable urge to extend it. Warning: If you have some or all of the above symptoms, 1 please be advised that your ,ondition of inner peace may be so far advanced as to not be curable. If you are exposed to anyone exhibiting any of these symptoms, remain exposed at your own risk. b y Saskia Davis 1 1 C ITY 0 F BOA DATE: 1/11/93 k � CHAfl1AII CC DATE: I CASE #: 92 -13 VAR By: • Al -Jaff STAFF REPORT PROPOSAL: A 49 foot Wetland Setback Variance and a 30 foot front yard setback variance for the construction of a Single Family Residence. z LOCATION: 6921 Yuma Drive - Lots 2919 thru 2943, also Lots 2877 thru 2897 1 fi Z — APPLICANT: Shannon T. Terry I 52 One Hawthorne Road a Hopkins, MN 55343 Q PRESENT ZONING: RSF, Residential Single Family ACREAGE: Approximately 84,000 square feet DENSITY: ADJACENT ZONING AND LAND USE: N - RSF; single family Q S - Class B Wetland E - Class B Wetland f" — W - RSF; single family d . WATER AND SEWER: Available to the site W 1 PHYSICAL CHARACTER.: The site contains a Class B wetland and is covered with (f� natural vegetation. The wetland acts as a natural drainage way causing the site to be wet throughout the year with the exception of the winter months. 2000 LAND USE PLAN: Residential Low Density 1 1 Terry Variance 1 January 11, 1993 Page 2 1 APPLICABLE REGULATIONS The Zoning Ordinance requires a 30 foot front yard setback, and a 75 foot setback from the edge of the wetland. BACKGROUND 1 Until May 21, 1984, the following lots in Carver Beach were under single ownership: 1 Lots 2873 - 2876 Lots 2921 - 2922 Lots 2914 - 2918 Lots 2923 - 2943 Lots 2919 - 2920 Lots 2877 - 2897 On May 21, 1984, the City stamped approval of the deed permitting the subdivision of Lots 2872 1 - 2876 and Lots 2914 - 2918 from the remaining above mentioned parcels. The lot that was split off from the total piece was then sold to Mr. Joe Morton and is now under separate ownership. The approval of the subdivision created two lots that met the minimum requirements of the 1 Zoning Ordinance. The remaining piece (subject property) contains a protected wetland and a small buildable area outside the wetland. Due to the wetland setbacks, it is not possible to construct a home without a setback variance. Since the subdivision had been approved by the city, has been recorded with Carver County and the two lots are now under separate ownership, the city would have to consider the remaining parcel consisting of Lots 2919 -2943 and Lots 2877 -2897 as a lot of record. As a lot of record it should be allowed to be put to its intended use, even if variances are required, or the city has some exposure to legal action for taking property without compensation. In December, 1990, Mr. Thomas Rhode submitted a street vacation and a variance application for the subject property to build a single family residence. While drainage and wetland issues concerning this parcel were being reviewed, Mr. Rhode decided to withdraw his application. ANALYSIS 1 The applicant is requesting two variances. The first is a 30 foot front yard variance to allow a front setback of 0 feet and the second is a variance to allow a 31 foot (as modified by staff) wetland setback versus the 75 feet that is required by ordinance. The site contains a protected wetland and fronts on 3 public right -of -ways, none of which are improved streets. Access would be provided by a private driveway constructed in the public right -of -ways. The site contains forty-six Carver Beach lots (Lots 2919 -2943 and Lots 2877 - 2897). It has 320 1 feet of street frontage on Yuma Drive, 290 feet of frontage on Dogwood Drive and 540 feet of frontage on Ringo Drive. 1 1 Terry Variance January 11, 1993 1 Page 3 There is an existing watermain located on Yuma Drive. The applicant is proposing to locate the residence 10 feet from the watermain. The Assistant City Engineer is requiring the house be setback a minimum of 15 feet from the watermain. This will result in pushing the house 5 feet closer to the wetland and further reducing the setback. The applicant is also proposing to build a 20 foot deep deck located 26 feet from the edge of the wetland. Staff is recommending the depth of the deck be reduced to 10 feet to minimize the wetland setback variance. Under this scenario there would be a 31 foot setback from the wetland where as the ordinance requires 75 1 feet. Attachment #2 shows the required setbacks for the proposed site. A single family residence could not be located within the setback requirements of the RSF District. Without a variance to the required lot area, the lot would be unbuildable. The proposed location of the home and driveway provides the best site distance for access onto Yuma Drive. The home is also located where it will preserve existing trees on the site. A variance may be granted by the Board of Adjustments and Appeals or City Council only if all of the following criteria are met: a. That the literal enforcement of this chapter would cause undue hardship. Undue hardship means that the property cannot be put to reasonable use because of its size, physical surroundings, shape or topography. Reasonable use includes a use made by a majority of comparable property within 500 feet of it. The intent of this provision is not to allow a proliferation of variances but to recognize that and develop neighborhoods pre - existing standards exist. Variances that blend with these pre - existing standards without departing downward from them meet this criteria. * Staff conducted a survey within 500 feet of the surrounding area and found that the average minimum front yard setback is 20 feet. We also found that all homes in the area meet the normal 75 foot setback standard. However, in this case, the city created the parcel and approved it as a buildable lot. Without a variance, the applicant would be denied reasonable use of his property. b. The conditions upon which a petition for a variance is based are not applicable, generally, to other property within the same zoning classification. * The conditions upon which this petition for a variance is based are not generally applicable to other properties within the same zoning classification outside of the immediate area. They only apply to lots located in the Carver Beach subdivision and more specifically to lots of record that are impacted by wetland protection regulations. 1 1 1 Terry Variance 1 January 11, 1993 Page 4 1 c. The purpose of the variation is not based upon a desire to increase the value or income potential of the parcel of land. 1 * This does not appear to be the case. The applicant is attempting to utilize the parcel for single family residential uses it was created for. 1 d. The alleged difficulty or hardship is not a self created hardship. * The hardship is not self created. The parcel is an existing lot of record. Denying the variance would mean depriving the applicant reasonable use of his property. e. The rantin of the variance will not be detrimental to the public welfare of injurious to 111 g g other land or improvements in the neighborhood in which the parcel is located. * The rantin of the variance will not be detrimental or injurious to other land or g g injurious in the neighborhood. f. The proposed variation will not impair an adequate supply of light and air to adjacent property or substantially increase the congestion of the public streets or increases the danger of fire or endanger the public safety or substantially diminish or impair property values within the neighborhood. * The granting of the variance will not impair an adequate supply of light and air 1 to those properties, nor will it increase the congestion of the public streets or increase the danger of fire or endanger the public safety or substantially diminish or impair property values within the neighborhood. Staff is aware that the requested variances and proposal to build on this parcel is causing a good deal of neighborhood concern. We empathize with the situation and agree that significant portion if not all of the lot is wet on a constant or intermediate basis. We agree that the parcel could be valuable to the city in ponding area for a water quality and retention basin that would fit into the system and that ultimately protects Lotus Lake. We even would agree that building on this lot is probably a poor idea from the standpoint of construction limitations. However, it is a lot of record and without allowing it legitimate use we may be exposed to a "takings" issue. Therefore, we must recommend that the variance, as modified by staff, be approved. 1 Under the circumstances, the Board of Adjustments and Appeals may wish to continue the item to give the City Council an opportunity to explore purchasing the land but it should be clear that staff has no assurances that this will occur. 1 1 Tent' Variance January 11, 1993 1 Page 5 RECOMMENDATION For the above mentioned reasons, staff is recommending approval of Variance #92 -13 for a 5 foot front yard setback and a 31 foot wetland setback with the following conditions: 1. The applicant maintain a 15 foot setback from the center of the watermain located in Yuma Drive. 2. The applicant shall reduce the depth of the deck to 10 feet to minimize impact on the wetland. 3. The applicant shall submit a tree preservation plan prior to issuance of a building permit. PP P 1 4. Type III erosion control be maintained during the construction season along the edge of the wetland. 1 5. No additional construction is permitted without a variance application. 6. The applicant shall enter into an agreement with the city providing for private construction and maintenance of the driveway in public right -of -way. 7. The applicant shall retain a qualified soils engineer to evaluate the site for the proposed structure. 8. The applicant shall retain a structural engineer to design the foundation if soil conditions are such that a conventional foundation would be deemed inadequate. 9. A drainage plan shall be submitted for approval by the city prior to building permit issuance. ATTACHMENTS 1. Memo from Steve Kirchman dated January 8, 1993. 2. Site plan showing location of proposed home and buildable area on site. 3. Typical trench excavation limits. 4. Elevation of proposed home. 5. Letter from the applicant (Variance Requirements). 1 1 1 C ITYOF 1 11111 1 111 11! CHANHASSEN 690 COULTER DRIVE • P.O. BOX 147 • CHANHASSEN, MINNESOTA 55317 MEMORAN - (612) 937 -1900 • FAX (612) 937 -5739 TO: Sharmin Al -Jaff, Planner I FROM: Steve A. Kirchman, Building Official 4 K DATE: 01/08/93 I SUBJECT: 92 -13 VAR (Shannon T. Terry) BACKGROUND The Planning Department requested my presence at the 01/11/93 Board of Appeals" and Adjustments meeting to discuss soils and foundations for the proposed Terry dwelling. I am unable to attend, and will try and address concerns of the Inspections Division in this memo. ; ANALYSIS 1. Soils. The Carver County Soils Survey (attachment #3) indicates two soil types on the subject property, Glencoe silty clay loam (Ge) and Marsh (Ma). Unaltered Glencoe soils are periodically flooded and retain high II levels of moisture in dry periods. They also have a high organic matter content. These factors give sites with glencoe soils a building site rating of 10 (on a scale of 1 to 11 with 11 being the worst). Marsh soils" are wet most of the time and also have a building site rating of 10. 2. Foundations. Due to soils likely to be present on the building site 1 extreme care must be exercised in foundation design. Water tables are likely to be encountered at about 12 ", which makes the installation of below grade finished areas subject to water problems and structural problems. The potential for frost damage, structural damage and wet walls and floors is very high. The generally high organic content of glencoe soils in conjunction with high water tables make special engineering for foundations a necessity. Surcharging, corrected house pads, pilings, and deep footing are some methods which may need to be employed to adequately support the structure. The most appropriate, cost effective method will need to be determined by a structural engineer who is experienced with these types of problems and has a knowledge of the soils particular to thell site. 3. Site. Grade changes on the site to accommodate the proposed structure may I affect general drainage patterns in the area. A drainage plan should be designed to address this concern. 1 v PRINTED ON RECYCLED PAPER 1 II II 'Sharinin Al -Jaff • 01/08/93 ( Page 2 COMMENDATION pproval is recommended with the following conditions: I( . The applicant shall retain a qualified soils engineer to evaluate the site for the proposed structure. . The applicant shall retain a structural engineer to design the foundation if soil conditions are such that a conventional foundation would be deemed IL inadequate. . 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BUILDERS Proposed Top of Block ' Proposed Garage Floor Proposed Lowest Floor • Type of Building • . \ l7'• / -� • ' ' / '' - � •' ` \off , '"•9 t.-- .- ' \, ` Z. q 9 / • 'ieYi `LL ir'? 14 A 7 t....., c ... s • 9eL f k iTD ' <3 - \ c jt- " ____ : 1 6 , . R ___\_.---------- _, , \ . o•p \ _ " '0 (.1 ./... .192-"e: '� _- le\ r ,,,,� A.,\ ` y Lots 2919, through 2923, also Lots 2877, through 2881, CARVER BEACH, Carver County, Minnesota i . The only easements shown are horn piste of road or Inlonnstlon provided by C ala t certiy that this Is a true and axrset representation of a survey of the /1 , //�� /) //�� 01 the above o n said lend. location of all buildings and vls • l / 1 Id encroachment*, o �i �f / ! Ida enoroenwnts, /T /L�/ surveyedbyustnls 11th day of November t9 92 Sipud A ymo nd A. Preach Mim. Reg. No. 6743 In T i MI . al. 11111 MIN all. liali • OM 1DD ' I Li 1 .. e. ./'...... il ,. - " - . ' \ • A \ s , .... ... --- 110, -,..-•.; , ...,-... , 1 1 1 I . 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P ' r, 11 I • i f ) - ._ , ... , iiii_H s..... . - / 1 — i 4° • • • .• 216‘ Z I, ' . i S•4•' - 1 i I ...4 2(0 / .---- 4 I ; 3 . 4 •---;.:: -....• i i !. { • ; 1 ; ,.. • I :2 el • . ...,- . •1 . ' . . • ' , 111 :f 1 4 ' ) I 1 1 1 1 • -AA ' ..- - . 1 11111. 1 i «I i .1 '. : V AI C II I II- t. • 21. 14 i ..• ' . • .....—.7 - - lit . 4 • ..: f . S ONINAMMINMON i , - n j . . .1 • 7" -‘ .t. L—.—L . .• • , ,... I J t ' • .• , L_...... • , / V • 1 i i....‘ L.=—...• ...• LI .. 3 —..— ., _ . • ..- Oil — ,— " I ' . • . . . . ' . ..'-. I/4 , 4 , - - v -ill • . . . 01 — ■ 1, I, f E.. — ni- Ili r I I 1 1 --1- 1 ' i o —IFI --131 v T • .1-- ii ' 1 T cl 1 1 Variance Requirements 1 8. Request to allow the rear boundary of proposed home to exceed set back from wetland requirement 4 feet, with an additional amount of I 20 feet from rear boundary of proposed attached deck, the total amount is not to exceed 24 feet. 1 9. a. Variance request is due to undue hardship. Several previous attempts by other buyers to purchase said property have been 1 unsuccessful because of the set back requirement of 50 feet from the arbitrarily chosen 929 feet elevation requirement. The current visible wetland perimeter is considerably farther away than what is 1 dictated by the elevation. The proposed plans have been modified to best accommodate the property boundaries, i.e., positioning, reversal of plan, and change of plan. Observance of all set back requirements 1 inhibits the use of the property for the proposed plan. Please note that the front -to -rear slope of the property indicate 1 that it is best suited for a walk -out floor plan. The house plans require 2 to 3 rear exits, some of which will be 4 to 8 feet above the I ground level, requiring a deck to connect the exits, so the deck is not a cosmetic luxury it is a necessity for the home to be fully utilized. I b. Adjacent properties had sufficient land area and /or no wetland restrictions as not to require a variances. 1 c. The purpose of this variance is only to allow the addition of the proposed plan to the property. 1 d. We do not currently own the property so the hardship is not self - created. The sale of the property is contingent upon the approval of 1 the variance. e. The purpose of the variance is to allow the addition of a home to 1 the said property, no detriment will be caused to other land or improvements in the neighborhood. The proposed plan is consistent with the values of the surrounding dwellings. I f. Proposed home plans are not unreasonable and do not pose threat I to adjacent properties in any way. 1 1 01/21/93 14:18 $812 452 5550 CAMPBELL KNUTSON 12 002 ��.�� ' CAMPBELL, KNUTSON, SCOTT & FUCHS, RA. ALimiic .i Uivy T1-4,111,.r. J Conzprncll (612) 4 52. O00 tii g c l N Attu Ls. Ott P.,t (612( •=02-55%) Th,,r,,.,,M...,,,,rr January 21, 1993 ' Cary 0 Puch, J;i nes K. W.rl,wtr f nirr li. K; cv._lr Mich;icl A. IirtE',tck CONFIDENTIAL Kr:n. 1).6Wmcr ' CHANHASSEN CITY COUNCIL Donald J. Chmiel Mayor Colleen Dockendorf, Councilwoman Mike Mason, Councilman Richard Wing, Councilman Mark Senn, Councilman 1 Re: Shannon T. Terry Variance Application Dear Mayor and Councilmembers: The Board of Adjustment and Appeals has voted to deny the Shannon Terry variance application. without the requested variance, it will be impossible to construct a home on the property. Minn. Stat. § 462.357 provides a variance should be approved to prevent an "undue hardship" which is defined as "the ' property cannot be put to reasonable use because of its size, physical surroundings, shape or topography." The Terry variances satisfy this requirement. 1 The United States Supreme Court has ruled that if a property owner is deprived of all viable use of property the landowner must be compensated. kicas_v. California Costal Commission, ' U.S. (1992). It is only in the rarest of situations that the City can use its zoning regulations to prevent all use of property without paying compensation_ This is not one of the ' rare situations. Ve truly yours, 1 CAMPBELL KNUTSON, SCOTT •S, P.A •oger N. utson ' RISK: rlt cc: Mr. Don Ashworth Board of Adjustment and Appeals ' X1 26 . �iiitr� '1 • I- : .�g,•in{�r�le Office Center • 1380 Corporate Center Curve &ly'i.tIl, MN 55I?1