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CC Staff Report 7-9-07 CITY OF CHANHASSEN 7700 Market Boulevard PO Box 147 Chanhassen, MN 55317 Administration Phone 952.227,1100 Fax: 952.227.1110 Building Inspections Phone: 952.227,1180 Fax: 952.227.1190 Engineering Phone: 952,227,1160 Fax: 952.227,1170 Finance Phone: 952.227.1140 Fax: 952.227,1110 Park & Recreation Phone: 952.227,1120 Fax: 952.227,1110 Recreation Center 2310 Coulter Boulevard Phone: 952.227,1400 Fax: 952,227,1404 Planning & Natural Resources Phone: 952.227.1130 Fax: 952,227,1110 Public Works 1591 Park Road Phone: 952.227,1300 Fax: 952.227,1310 Senior Center Phone: 952.227,1125 Fax: 952,227,1110 Web Site WIfW.ci ,chanhassen, mn. us 4d.-1' _L .'_ ~",___~#f'~"""'!iIII4' MEMORANDUM TO: Todd Gerhardt, City Manager FROM: Sharrneen AI-Jaff, Senior Planner DATE: olJ,.I . July 9, 2007 ~'-;" SUBJ: Fox Hill Final Plat Approval, 10 Spring Homes, Inc. Planning Case #07-03 PROPOSAL SUMMARY The developer is requesting final plat approval with variances to subdivide 1.69 acres into three single-family lots for Fox Hill. ACTION REQUIRED City Council approval requires a majority of City Council present. BACKGROUND On January 22,2007, the City Council adopted the following motion: "The City Council approves the preliminary plat for Planning Case 07-03 for Fox Hill Subdivision for three lots with variances to allow a private street as shown on the plans dated received December 1, 2006, subject to the following conditions: 1. A minimum of two 2~-inch deciduous, overstory trees shall be required in the front yard of each lot. Finding: This condition still applies. 2. No more than one-third of the required trees may be from anyone species. Finding: This condition has been met. The applicant submitted revised landscape plans that show no more than one-third of each species. 3. Tree preservation fence shall be installed at the edge of the grading limits around all trees proposed to be preserved prior to any grading. Finding: This condition still applies. 4. Any trees proposed for preservation that are lost due to grading and construction acti vities will be replaced at a rate of 2: 1 diameter inches. Finding: This condition still applies. cCAtmED The City ot Chanhassen · A growing community with clean lakes, quality schools, a chamning downtown, thriving businesses, winding trails, and beautiful parks, A great place to live, work, and play, Todd Gerhardt Fox Hill Final Plat - Planning Case 07-03 July 9, 2007 Page 2 5. The Storm Water Pollution Prevention Plan (SWPPP) shall be provided to the City so it can be reviewed by the Carver Soil and Water Conservation District. Finding: This condition still applies. 6. The plans shall be revised to incorporate Chanhassen's standard details for erosion and sediment control, including 5300, 5301, 5302A and 5302D. Finding: This condition has been met. 7. In order to ensure that the proposed infiltration area functions properly, the contractor shall minimize the number of equipment trips across this part of the site. Additionally, the lightest equipment appropriate for the job shall be used. Once the infiltration area is graded, the easement area shall be fenced off so no further compaction occurs. The applicant may want to consider planting native shrubs, grasses and wildflowers within the infiltration area instead of sod to promote volume reduction through infiltration and evapotranspiration. Finding: This condition still applies. 8. A stable emergency overflow (EOF) for the infiltration area shall be provided. The EOF could consist of riprap and geotextile fabric or a turf re-enforcement mat (a permanent erosion control blanket). A typical detail shall be included in the plan. Finding: This condition still applies. 9. Erosion control blanket shall be installed on all slopes greater than or equal to 3:1. All exposed soil areas shall have temporary erosion protection or permanent cover year round, according to the following table of slopes and time frames: Type of Slope Steeper than 3: 1 10:1 to 3:1 Flatter than 10: 1 Time 7 days 14 days 21 days (Maximum time an area can remain open when the area is not actively being worked.) These areas include constructed storm water management pond side slopes, and any exposed soil areas with a positive slope to a storm water conveyance system, such as a curb and gutter system, storm sewer inlet, temporary or permanent drainage ditch or other natural or man made systems that discharge to a surface water. Finding: This condition still applies. 10. The plans shall be revised to show a rock construction entrance (minimum 75 feet in length) off Fox Hollow Drive. The rock construction entrance shall be constructed in accordance with Chanhassen's Standard Detail 5301. Street cleaning of soil tracked onto public streets shall include daily street scraping and street sweeping as needed. Todd Gerhardt Fox Hill Final Plat - Planning Case 07-03 July 9, 2007 Page 3 Finding: This condition has been partially met and is modified to read "Street cleaning of soil tracked onto public streets shall include daily street scraping and street sweeping as needed." 11. At this time, the estimated total SWMP fee, due payable to the City at the time of final plat recording, is $8,450. Finding: This condition still applies. 12. The applicant shall apply for and obtain permits from the appropriate regulatory agencies (e.g., Riley-Purgatory-Bluff Creek Watershed District, Minnesota Pollution Control Agency (NPDES Phase IT Construction Site Permit), Minnesota Department of Natural Resources (for dewatering), Carver County, Minnesota Department of Transportation, Minnesota Department of Health) and comply with their conditions of approval. Finding: This condition still applies. 13. Full park fees in lieu of parkland dedication and/or trail construction shall be collected in full at the rate in force upon final plat submission and approval. Finding: This condition still applies. 14. Building Official Conditions: a. A final grading plan and soils report must be submitted to the Inspections Division before building permits will be issued. Finding: This condition still applies. b. Demolition permits must be obtained prior to demolishing any structures on the site. Finding: This condition still applies. c. Retaining walls more than four feet high must be designed by a professional engineer and a building permit must be obtained prior to construction. Finding: This condition still applies. d. Separate sewer and water services must be provided to each lot. Finding: This condition still applies. e. Any existing wells and on-site sewage treatment systems on the site must be abandoned in accordance with State Law and City Code. Finding: This condition still applies. Todd Gerhardt Fox Hill Final Plat - Planning Case 07-03 July 9, 2007 Page 4 15. Fire Marshal conditions: a. Add an additional fire hydrant at the intersection of Fox Hollow Drive and Fox Hollow Court. Finding: This condition still applies. b. A lO-foot clear space must be maintained around fire hydrants, i.e., street lamps, trees, shrubs, bushes, Xcel Energy, Qwest, cable TV and transformer boxes. This is to ensure that fire hydrants can be quickly located and safely operated by firefighters. Pursuant to Chanhassen City Ordinance #9-1. Finding: This condition still applies. c. Temporary street signs shall be installed at street intersections once construction of the new roadway allows passage of vehicles. Pursuant to 2002 Minnesota fire Code Section 501.4. Finding: This condition still applies. d. Fire apparatus access roads and water supply for fire protection is required to be installed. Such protection shall be installed and made serviceable prior to and during the time of construction except when approved alternate methods of protection are provided. Finding: This condition still applies. e. No burning permits shall be issued for trees to be removed. Trees and shrubs must either be removed from site or chipped. Finding: This condition still applies. 16. All existing buildings, driveways and accessory structures must be removed before grading commences. Finding: This condition still applies. 17. Submit calculations of storm sewer and NURP showing that the development meets the requirements of the City and the MPCA. Determine the new HWL for the existing pond and show it on the plan along with the NWL. Finding: This condition has been partially met and modified to read "Storm sewer calculations must be revised to reflect the changes to the current plans." Todd Gerhardt Fox Hill Final Plat - Planning Case 07-03 July 9, 2007 Page 5 18. The swales on the eastern side of Lot 2, between Lots 2 and 3, and the swale west of Lot 3 must have a 2% minimum slope. Also, the swales in the northwest comer of the house of Lot 1, back yard of Lot 2, and side yard of Lot 3 should be moved away from the foundations of the structures. Plantings shall be placed outside the swales to promote drainage. Add spot elevations at the building comers of Lot 1. Finding: This condition has been partially met and modified to read "Plantings must be placed outside the swales to promote drainage. Show contours in the proposed street and 100 feet south of the site." 19. A valley gutter shall be installed at the intersection of Fox Hollow Drive and the private street to convey water through the intersection. Also, provide spot elevations on the curb to ensure curb line has a minimum slope of 0.5%. Finding: This condition has been modified to read "The valley gutter must be revised to match city plate 5206. The catch basins shall be relocated accordingly." 20. The proposed storm line connecting to the existing storm sewer shows a bend without a structure. A structure will be required at all bends of storm sewer. Maintain 18 inches of separation between the sanitary sewer and drain tile. Finding: This condition has been modified to read "A 48-inch catch basin shall be installed to replace the existing undersized structure in Fox Hollow Drive." 21. On the Grading, Drainage and Erosion Control Plan, show: a. Private street and driveway grades shall not exceed 10%. Finding: This condition has modified to read "Private street and driveway grades shall not exceed 10%. The grades of the driveways shall be shown on grading plan. b. Ground (i.e. non-paved) surface grades shall not be less than 2%. Finding: This condition has been met. c. Emergency overflow locations and elevations must be shown on the plan. Finding: This condition still applies. d. Add bottom elevations to the retaining walls. Finding: This condition still applies. Todd Gerhardt Fox Hill Final Plat - Planning Case 07-03 July 9, 2007 Page 6 22. An easement is required from the appropriate property owner for any off-site grading. Finding: This condition still applies. 23. If importing or exporting material for development of the site is necessary, the applicant will be required to supply the City with detailed haul routes. Finding: This condition still applies. 24. Building permits are required for all retaining walls four feet tall or higher and must be designed by a Structural Engineer registered in the State of Minnesota. Finding: This condition still applies and has been modified to read "Building permits are required for all retaining walls four feet tall or higher and must be designed by a Structural Engineer registered in the State of Minnesota. The retaining wall along Highway 101 must be removed per the letter from the MN Department of Transportation dated December 21, 2006. The watermain along Highway 101 must be located to ensure that adequate cover remains after removal of the retaining wall. A permit will be required to enter the right-of-way. 25. All sanitary sewer, watermain and storm sewer within this site shall be publicly owned and maintained. Finding: This condition still applies. 26. The watermain extension from Fox Hollow Drive must be wet-tapped. Due to the alignment of the watermain in Fox Hollow Drive, it appears that this connection cannot be done under traffic. The sanitary sewer connection on Fox Hollow Drive connecting to an existing stub shall also be completed under traffic. Finding: This condition has been met. 27. Utility plans shall show both plan view and profiles of all utilities (sanitary sewer, water, and storm sewer lines. The actual elevations of existing utilities shall be determined. Finding: This condition still applies and has been modified to read "Show the location of curb stops and sanitary sewer services with elevations of both. Connect at least one section of pipe to the existing sanitary sewer before placing a manhole. Lower the invert of proposed manhole 2 a minimum of one foot. Complete the storm profile and stationing on the plans. Direct the outlet of the infiltration area east of the berm of Lot 6, Block 5, of Fox Hollow to the ditch along Highway 101. Todd Gerhardt Fox Hill Final Plat - Planning Case 07-03 July 9, 2007 Page 7 28. Install cleanout for the sewer service for Lot 2 due to length. Finding: This condition still applies. 29. Each new lot is subject to the sanitary sewer and water hookup charges. The 2006 trunk hookup charge is $1,669 for sanitary sewer and $4,485 for watermain. Sanitary sewer and watermain hookup fees may be specially assessed against the parcel at the time of building permit issuance. All of these charges are based on the number of SAC units assigned by the Met Council and are due at the time of building permit issuance. Finding: This condition has been modified. The underlying property was assessed for 3 lots in 1975. This assessment has been paid. Therefore, the trunk sewer and water charges are not due with the building permit. The new condition shall read "All applicable Met Council fees will be collected with the application for a building permit." 30. The utilities will need to be adjusted to allow a minimum of 10 feet horizontal separation between the easement and the proposed utilities. Finding: This condition has been modified to read "The drainage and utility easement located along the western portion of the site must be revised to include a cross-access easement in favor of all property owners within the Fox Hill Subdivision. Revise the plat as necessary." 31. A 1O-foot drainage and utility easement will be required for the front of Lots 2 and 3. Finding: This condition still applies and is modified to read "The final plat shall be revised to show a 10-foot drainage and utility easement along the fronts of Lots 2 and 3." 32. The private street entrance must connect to Fox Hollow drive at a 90-degree angle. Finding: This condition has been modified to read "The private street must maintain a minimum of 20 feet of length perpendicular to the valley gutter. Also, correct the scale on the road profile." 33. Lot 3, Block 1, must maintain a 20-foot side yard setback along the westerly property line. Finding: This condition still applies. 34. The applicant shall file covenants concerning maintenance of the private street against all benefiting properties as required in section 18-57 (p) 2 of the city code. Finding: This condition still applies. Todd Gerhardt Fox Hill Final Plat - Planning Case 07-03 July 9, 2007 Page 8 35. The applicant shall provide signs or other markings identifying the common areas of the pri vate street. Finding: This condition still applies." FINAL PLAT The applicant is proposing to subdivide a 1.69 acre site into three single-family lots. The density of the proposed subdivision is 1.77 units per acre gross and 2.19 units per acre net. All lots exceed the minimum 15,000 square feet of area, with an average lot size of 20,183 square feet. All proposed lots meet the minimum width and depth requirements of the Zoning Ordinance. The lots are proposed to be served via a private street. The City Code requires a 30-foot front yard setback for lots served by private streets. The front yard is the lot line nearest the public right-of-way that provides access to the parcel. As such, the front lot line is the northerly property line on all three lots. Also, all three lots have frontage on Highway 101. Consequently, these lots are considered comer lots and must maintain a 30-foot setback along the easterly property line as well. All remaining setbacks are 10 feet as they are side yard setbacks. Staff is recommending that Lot 3 maintain a 20-foot side yard setback along the westerly property line to provide additional buffer for the property to the west. The City may require an increase in a setback when a parcel is served by a private street (SectionI8-57 Streets p-6). Staff notes that the proposal is consistent with the Comprehensive Plan and generally consistent with the Zoning Ordinance. WETLANDS No wetlands exist on site. EROSION AND SEDIMENT CONTROL A NPDES Phase II Construction Site Storm Water Permit will be required from the Minnesota Pollution Control Agency (MPCA) for this site. A Storm Water Pollution Prevention Plan (SWPPP) will be required in conjunction with this application. The SWPPP should be provided to the City so it can be reviewed by the Carver Soil and Water Conservation District. The plans should be revised to incorporate Chanhassen's standard details for erosion and sediment control, including 5300,5301, 5302A and 5302D. In order to ensure that the proposed infiltration area functions properly, the contractor should minimize the number of equipment trips across this part of the site. Additionally, the lightest equipment appropriate for the job should be used. Once the infiltration area is graded, the easement area should be fenced off so no further compaction occurs. The applicant may want to Todd Gerhardt Fox Hill Final Plat - Planning Case 07-03 July 9, 2007 Page 9 consider planting native shrubs, grasses and wildflowers within the infiltration area instead of sod to promote volume reduction through infiltration and evapotranspiration. A stable emergency overflow (EOF) for the infiltration area should be provided. The EOF could consist of riprap and geotextile fabric or a turf re-enforcement mat (a permanent erosion control blanket). A typical detail should be included in the plan. Erosion control blanket shall be installed on all slopes greater than or equal to 3:1. All exposed soil areas shall have temporary erosion protection or permanent cover year round, according to the following table of slopes and time frames: Type of Slope Steeper than 3: 1 10:1 t03:1 Flatter than 10: 1 Time 7 days 14 days 21 days (Maximum time an area can remain open when the area is not actively being worked.) These areas include constructed storm water management pond side slopes, and any exposed soil areas with a positive slope to a storm water conveyance system, such as a curb and gutter system, storm sewer inlet, temporary or permanent drainage ditch or other natural or man made systems that discharge to a surface water. The plans should be revised to show a rock construction entrance (minimum 75 feet in length) off Fox Hollow Drive. The rock construction entrance should be constructed in accordance with Chanhassen's Standard Detail 5301. Street cleaning of soil tracked onto public streets shall include daily street scraping and street sweeping as needed. SURFACE WATER MANAGEMENT FEES Because of the impervious surface associated with this development, the water quality fees for this proposed development are based on single-family residential development rates of $1,900/acre. Based on the proposed developed area of approximately 1.69 acres, the water quality fees associated with this project are $3,211. The SWMP has established a connection charge for the different land uses based on an average city wide rate for the installation of water quantity systems. This cost includes land acquisition, proposed SWMP culverts, open channels, and storm water ponding areas for runoff storage. Single- family residential developments have a connection charge of $3,100 per developable acre. This results in a water quantity fee of approximately $5,239 for the proposed development. At this time, the estimated total SWMP fee, due payable to the City at the time of final plat recording, is $8,450. OTHER AGENCIES The applicant shall apply for and obtain permits from the appropriate regulatory agencies (e.g., Riley-Purgatory-Bluff Creek Watershed District, Minnesota Pollution Control Agency (NPDES Todd Gerhardt Fox Hill Final Plat - Planning Case 07-03 July 9, 2007 Page 10 Phase II Construction Site Permit), Minnesota Department of Natural Resources (for dewatering), Carver County, Minnesota Department of Transportation, Minnesota Department of Health) and comply with their conditions of approval. GRADING AND DRAINAGE The 1.7 acre site is bordered by Fox Hollow Drive to the north, State Highway 101 to the East and Fox Hollow Subdivision to the south and west. There is an existing house, two accessory structures, and a gravel drive on the site; all of these must be removed before site grading commences. The high point of the site divides the site into two main pieces. Approximately 60 percent of the drainage drains to the new low area in the southeast corner of the site. The remaining 40 percent drains through a series of catch basins and enters an existing pond north of Fox Hollow Drive. Hydrology calculations were submitted which meet the requirements of the Minnesota Department of Transportation and the City of Chanhassen. Storm sewer calculations were provided, but will need to be updated to reflect changes to the current plans. Contours will need to be shown in the roadway and 100 feet south of the site. Plantings shall be placed outside of swales to promote drainage. The outlet structure provides a 6-inch restrictor pipe. This will need to be removed to allow the structure to be used as an overflow. An alternative solution is needed to restrict the flow in normal conditions. The elevation of the beehive grate shall be added to the plans. The PVC pipes will need to be replaced with RCP. A valley gutter was installed at the intersection of the private drive and Fox Hollow Drive. This valley gutter does not match city plate 5206. The elevations near this intersection will need to be revised, along with the locations of the catch basins. Provide spot elevations around the intersection to ensure that the curb line has a minimum of .5% slope. The infiltration basin outlet shall be directed east of the berm of Lot 6, Block 5, Fox Hollow. This will allow the storm water to enter the drainage ditch along Highway 101. The connection to the existing catch basin in Fox Hollow Drive is not feasible because the existing structure is too small. A new 48-inch structure will need to replace the existing structure to make the connection. Private driveway grades shall not exceed 10%. Emergency overflow locations and elevations must be shown on the plan. Todd Gerhardt Fox Hill Final Plat - Planning Case 07-03 July 9, 2007 Page 11 An easement is required from the appropriate property owner for any off-site grading. If importing or exporting material for development of the site is necessary, the applicant will be required to supply the City with detailed haul routes. RET AINING WALLS The proposed retaining walls are as follows: Location Alon the drivewa of lot 1 Rear ard of lot 1 Along the west side of the drive of lot 3 Length (a roximate) 100 feet 25 feet 25 feet Maximum Height (a roximate) 4 feet 4 feet 4 feet Elevations shall be added to the bottom of retaining walls to confirm actual height. Building permits are required for all retaining walls four feet tall or higher and must be designed by a Structural Engineer registered in the State of Minnesota. There is an existing retaining wall along Highway 101 which is approximately 2 feet high and 110 feet long. This retaining wall needs to be removed per the letter from the Minnesota Department of Transportation. The watermain along Highway 101 will need to be located to ensure that plenty of cover remains after removal of the retaining wall. A permit will be required to enter the right-of-way. UTILITIES The developer proposes to extend lateral sanitary sewer, watermain and storm sewer within the development. The sanitary sewer, watermain, and storm sewer will be publicly owned and maintained. Draintile and the culvert under the driveway of Lot 1 will be the responsibility of the homeowners. Proposed watermain will extend from the existing watermain within Fox Hollow Drive. The proposed watermain will terminate at the hydrant of Lot 3 having a total length of 270 lineal feet. Due to the alignment of the watermain off of Fox Hollow Drive, it appears that the connection cannot take place under traffic. The connection on Fox Hollow Drive must be wet-tapped. Sanitary sewer for this development will extend off of Fox Hollow Drive. A stub was provided during the construction of the Fox Hollow Subdivision which should allow this connection to be completed under traffic. Utility plans provided show both plan view and profiles of all utilities (sanitary sewer, water, and storm lines). Actual elevations of existing utilities shall be verified for accuracy. A cleanout for the sanitary sewer service will be needed for Lot 2 because of the length. Show the location of curb stops and sanitary sewer services with elevations of both. Connect at least one section of pipe to the existing sanitary sewer before placing a manhole. This will prevent the rim to be out of the curb line area. Also the invert of proposed manhole 2 should be lowered a minimum of one foot. The storm stationing is not shown on the plan and the profile is incomplete. Todd Gerhardt Fox Hill Final Plat - Planning Case 07-03 July 9, 2007 Page 12 The underlying property was assessed for three lots in 1975. This assessment has been paid; therefore, the trunk sewer and water charges are not due with the building permit. The Met Council fees still apply and will be collected with the application for a building permit. The developer will be responsible for extending lateral sewer and water service to the lots; therefore, the sanitary sewer and water connection charges will be waived. All of the utility improvements are required to be constructed in accordance with the City's latest edition of Standard Specifications and Detail Plates. The applicant is also required to enter into a development contract with the City and supply the necessary financial security in the form of a letter of credit or cash escrow to guarantee installation of the improvements and the conditions of final plat approval. The applicant must be aware that all public utility improvements will require a preconstruction meeting before building permit issuance. Permits from the appropriate regulatory agencies will be required, including the MPCA, Minnesota Department of Health, Watershed District and Minnesota Department of Transportation. EASEMENTS A drainage and utility easement has been provided for the utilities. This easement will need to be revised to allow all users access to their driveways. The utilities in this easement will need to be adjusted to ensure that there is a minimum of a 1O-foot horizontal separation between the easement and the proposed utilities. The front of Lots 2 and 3 require a 1O-foot drainage and utility easement. STREETS Access to the site will be a private street off of Fox Hollow Drive. The private drive must connect to Fox Hollow Drive at a 90 degree angle. The developer has provided plans showing the street as both private and public. Staff supports the variance to a private street because no additional houses will connect to this street. The private street within the development will be privately owned and maintained. The street must be built to a 7 -ton design, paved to a width of 20 feet, utilize a maximum grade of 7 percent, maintain 20 feet of length perpendicular to the valley gutter, and provide a turnaround area acceptable to the Fire Marshal. Upon completion of the pri vate street, the applicant shall submit a set of "as-built" plans signed by a professional civil engineer. Todd Gerhardt Fox Hill Final Plat - Planning Case 07-03 July 9, 2007 Page 13 PARKS AND TRAILS PARKS This property is located within the neighborhood park service area for North Lotus Lake Park. Future residents of Fox will have convenient access to the park from Fox Hollow Drive. North Lotus Lake is 19.8 acres in size and features a playground, picnic shelter, trails, hockey skating rink, seasonal shelter, tennislbasketball court, and a ball field. Ample off-street parking is available at the park. Many amenities at the park have been updated within the past few years. No additional parkland acquisition is being recommended as a condition of this subdivision. TRAILS Hill Park rink, The subject site has direct access to the Highway 101 North pedestrian trail. Upon development, all three homes will abut Highway 101 and the pedestrian trail located on the west side of the highway. No additional trail construction is being recommended as a condition of this subdivision. TREE PRESERV A TIONILANDSCAPING Canopy coverage and preservation calculations have not been submitted for the Fox Hill development. Staff has calculated the following coverages: Total upland area (including outlots) Total canopy area (excluding wetlands) Baseline canopy coverage Minimum canopy coverage allowed Proposed tree preservation 73,700 SF 13,000 SF 17% 25 % or 18,425 SF 13% or 10,000 SF The developer does not meet minimum canopy coverage allowed; therefore, the difference between the baseline and proposed tree preservation is multiplied by 1.2 to calculate the required replacement plantings. Difference in canopy coverage Multiplier Total replacement Difference in canopy coverage Total number of trees to be planted 3,000 SF 1.2 3,600 SF 5,425 SF 8 Todd Gerhardt Fox Hill Final Plat - Planning Case 07-03 July 9, 2007 Page 14 The total number of trees required for the development is 8. The applicant has proposed a total of 8 deciduous, overs tory trees and 64 evergreens and 25 ornamentals within buffer yards. The subdivision is also required to have bufferyard plantings along Highway 101. Requirements are as follows: Location Required Proposed Hwy. 101- bufferyard B 6 overs tory trees o overstory trees - 20' width 10 understory trees 26 understory trees 330' length 16 shrubs Berm on lots 1 & 2 The applicant generally meets the minimum requirements for bufferyard planting along Highway 10 1 by planting the overall total of over and understory trees and adding a berm. The applicant is proposing to save many of the existing trees on site. Staff recommends that all trees be thoroughly protected by installing fencing around all groups. COMPLIANCE WITH ORDINANCE - RSF DISTRICT Lot Area Lot Width Lot Depth Home Setback Ordinance 15,000 100' 125' 30' front/rear 10' sides BLOCK 1 Lot 1 18,067 115' 260' 30'/NA 10' 30'/NA 10' 30'/NA 20' Lot 2 19,372 115' 260' Lot 3 23,112 115' 260' RECOMMENDATION Staff recommends that the City Council adopt the following motion: "The City Council grants final plat approval with a variance for a private street for Fox Hill- Planning Case #07-03 for three lots as shown on the plans received June 11,2007 subject to the following conditions: 1. A minimum of two 2Y2-inch deciduous, overstory trees shall be required in the front yard of each lot. 2. Tree preservation fence shall be installed at the edge of the grading limits around all trees proposed to be preserved prior to any grading. Todd Gerhardt Fox Hill Final Plat - Planning Case 07-03 July 9,2007 Page 15 3. Any trees proposed for preservation that are lost due to grading and construction activities will be replaced at a rate of 2: 1 diameter inches. 4. The Storm Water Pollution Prevention Plan (SWPPP) shall be provided to the City so it can be reviewed by the Carver Soil and Water Conservation District. 5. In order to ensure that the proposed infiltration area functions properly, the contractor shall minimize the number of equipment trips across this part of the site. Additionally, the lightest equipment appropriate for the job shall be used. Once the infiltration area is graded, the easement area shall be fenced off so no further compaction occurs. The applicant may want to consider planting native shrubs, grasses and wildflowers within the infiltration area instead of sod to promote volume reduction through infiltration and evapotranspiration. 6. A stable emergency overflow (EOF) for the infiltration area shall be provided. The EOF could consist of riprap and geotextile fabric or a turf re-enforcement mat (a permanent erosion control blanket). A typical detail shall be included in the plan. 7. Erosion control blanket shall be installed on all slopes greater than or equal to 3:1. All exposed soil areas shall have temporary erosion protection or permanent cover year round, according to the following table of slopes and time frames: Type of Slope Steeper than 3:1 10:1 to 3:1 Flatter than 10: 1 Time 7 days 14 days 21 days (Maximum time an area can remain open when the area is not actively being worked.) These areas include constructed storm water management pond side slopes, and any exposed soil areas with a positive slope to a storm water conveyance system, such as a curb and gutter system, storm sewer inlet, temporary or permanent drainage ditch or other natural or man made systems that discharge to a surface water. 8. Street cleaning of soil tracked onto public streets shall include daily street scraping and street sweeping as needed. 9. At this time, the estimated total SWMP fee, due payable to the City at the time of final plat recording, is $8,450. 10. The applicant shall apply for and obtain permits from the appropriate regulatory agencies (e.g., Riley-Purgatory-Bluff Creek Watershed District, Minnesota Pollution Control Agency (NPDES Phase II Construction Site Permit), Minnesota Department of Natural Resources (for dewatering), Carver County, Minnesota Department of Transportation, Minnesota Department of Health) and comply with their conditions of approval. 11. Full park fees in lieu of parkland dedication and/or trail construction shall be collected in full at the rate in force upon final plat submission and approval. Todd Gerhardt Fox Hill Final Plat - Planning Case 07-03 July 9, 2007 Page 16 12. Building Official Conditions: a. A final grading plan and soils report must be submitted to the Inspections Division before building permits will be issued. b. Demolition permits must be obtained prior to demolishing any structures on the site. c. Retaining walls more than four feet high must be designed by a professional engineer and a building permit must be obtained prior to construction. d. Separate sewer and water services must be provided to each lot. e. Any existing wells and on-site sewage treatment systems on the site must be abandoned in accordance with State Law and City Code. 13. Fire Marshal conditions: a. Add an additional fire hydrant at the intersection of Fox Hollow Drive and Fox Hollow Court. b. A lO-foot clear space must be maintained around fire hydrants, i.e., street lamps, trees, shrubs, bushes, Xcel Energy, Qwest, cable TV and transformer boxes. This is to ensure that fire hydrants can be quickly located and safely operated by firefighters. c. Temporary street signs shall be installed at street intersections once construction of the new roadway allows passage of vehicles. Pursuant to 2002 Minnesota Fire Code Section 501.4. d. Fire apparatus access roads and water supply for fire protection is required to be installed. Such protection shall be installed and made serviceable prior to and during the time of construction except when approved alternate methods of protection are provided. e. No burning permits shall be issued for trees to be removed. Trees and shrubs must either be removed from site or chipped. 14. All existing buildings, driveways and accessory structures must be removed before grading commences. 15. Storm sewer calculations must be revised to reflect the changes to the current plans. 16. Plantings must be placed outside the swales to promote drainage. Show contours in the proposed street and 100 feet south of the site. 17. The valley gutter must be revised to match city plate 5206. The catch basins shall be relocated accordingly. 18. A 48-inch catch basin shall be installed to replace the existing undersized structure in Fox Hollow Drive. 19. On the Grading, Drainage and Erosion Control Plan, show: a. Private street and driveway grades shall not exceed 10%. The grades of the driveways shall be shown on grading plan. b. Emergency overflow locations and elevations must be shown on the plan. Todd Gerhardt Fox Hill Final Plat - Planning Case 07-03 July 9, 2007 Page 17 c. Add bottom elevations to the retaining walls. 20. An easement is required from the appropriate property owner for any off-site grading. 21. If importing or exporting material for development of the site is necessary, the applicant will be required to supply the City with detailed haul routes. 22. Building permits are required for all retaining walls four feet tall or higher and must be designed by a Structural Engineer registered in the State of Minnesota. The retaining wall along Highway 101 must be removed per the letter from the Minnesota Department of Transportation dated December 21,2006. The watermain along Highway 101 must be located to ensure that adequate cover remains after removal of the retaining wall. A permit will be required to enter the right-of-way. 23. All sanitary sewer, watermain and storm sewer within this site shall be publicly owned and maintained. 24. Show the location of curb stops and sanitary sewer services with elevations of both. Connect at least one section of pipe to the existing sanitary sewer before placing a manhole. Lower the invert of proposed manhole 2 a minimum of one foot. Complete the storm profile and stationing on the plans. Direct the outlet of the infiltration area east of the berm of Lot 6, Block 5, of Fox Hollow to the ditch along Highway 101. 25. Install cleanout for the sewer service for Lot 2 due to length. 26. All applicable Met Council fees will be collected with the application for a building permit. 27. The drainage and utility easement located along the western portion of the site must be revised to include a cross-access easement in favor of all property owners within the Fox Hill Subdivision. Revise the plat as necessary. 28. The final plat shall be revised to show a lO-foot drainage and utility easement along the fronts of Lots 2 and 3. 29. The private street must maintain a minimum of 20 feet of length perpendicular to the valley gutter. Also, correct the scale on the road profile. 30. Lot 3, Block 1, must maintain a 20-foot side yard setback along the westerly property line. 31. The applicant shall file covenants concerning maintenance of the private street against all benefiting properties as required in section 18-57 (p) 2 of the city code. 32. The applicant shall provide signs or other markings identifying the common areas of the pri vate street. Todd Gerhardt Fox Hill Final Plat - Planning Case 07-03 July 9, 2007 Page 18 33. Remove the restriction from the outlet pipe. An alternative solution is needed to restrict the flow during normal rain events. Add the elevations of the beehive grate to the plans. The PVC pipes shall be changed to RCP. 34. All of the utility improvements are required to be constructed in accordance with the City's latest edition of Standard Specifications and Detail Plates. The applicant is also required to enter into a development contract with the City and supply the necessary financial security in the form of a letter of credit or cash escrow to guarantee installation of the improvements and the conditions of final plat approval. The applicant must be aware that all public utility improvements will require a preconstruction meeting before building permit issuance. Permits from the appropriate regulatory agencies will be required, including the MPCA, Minnesota Department of Health, Carver County, Watershed District and Minnesota Department of Transportation. 35. Add city detail plates 5235, 5236, 5202A, and 2109. Remove details 5240, 5242, and 5243 as they do not pertain to this development. The slope must be shown on the typical street section. Revise the drain tile to show the correct location. 36. The specifications must include the city specifications for street construction. Working hours in the special conditions should be changed to reflect the same working hours on page G-28 of the General Conditions." ATTACHMENTS 1. Final Plat and Construction Plans. 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