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2c Amendment to Chapter 18 Subdivision 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 & Natura I 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 www.ci.chanhassen.mn.us c:Le. ~~ MEMORANDUM TO: Todd Gerhardt, City Manger FROM: Bob Generous, Senior Planner 60 January 9, 2006 DATE: SUBJ: Adoption of Ordinance, Chapter 18, Chanhassen City Code, Subdi visions ACTION REQUIRED A simple majority vote of City Council members present is required to adopt the amendment. BACKGROUND Over the past year and a half, staff has been review overall inte~tis to try to make the code easier to addressing as developers. City Code. Our nd use by . ciance to Staff is reco amending Chapte ATTACHMENT 1. Planning Commissio...t The City of Chanhassen · A growing community with clean lakes, quality schools, a charming downtown, thriving businesses, winding trails, and beautiful parks. A great place fo live, work, and play. CITY OF CHANHASSEN 7700 Market Boulevard PO Box 147 Chanhassen, MN 55317 Administration Phone: 952.227.1100 Fax: 952.227.1110 Building Inspections Phone: 952.22.7.1180 Fax: 952.2.27.1190 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: 952.2.27.1400 Fax: 952.227.1404 Planning & Natural Resources Phone: 952.227.t130 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 www.ci.chanhassen.mn.us [!J MEMORANDUM TO: Planning Commission FROM: Bob Generous, Senior Planner DA TE: o~- December 6, 2005 SUBJ: Amendments to Chapter 18 of the Chanhassen City Code, Subdivisions BACKGROUND The Planning Commission has review responsibility for Chapter 18. On November 1, 2005, staff reviewed the proposed changes to the Subdivision ordinance. DISCUSSION Issue: Development of either large lot subdivision areas outside the urban service area or where urban available. :D oor soil conditions in the co eliminate ind e would . either providi system or req ate subdivision in e not currently e city's desire to ibilityof ewer a) The low' known groun set forth in Section 2 b) The style of home (e. basement) must be n c) The standard lot benching shown. , lookout, walkout, full for each proposed style of home must be The City of Chanhassen . A growing community with clean lakes, quality schools, a charming downtown, thriving businesses, winding trails, and beautiful parks. A great place to live, work, and play. Planning Commission Amendments to Chapter 18, Subdivisions December 6, 2005 Page 2 d) Drain tile service must be provided to all properties where runoff will flow from the back to the front of the lot. e) Identify proposed soil stockpile areas and note stabilization measures that will be taken. Issue: The final plat submittal requirements do not correspond with our GIS system. Recommendation: Revise Section 18-41 (a) (5). Final plat-Generally to require that the digital files must be in the Carver County coordinate system. Issue: The current ordinance does not specify a length for cul-de-sacs. Rather it states that "the length shall be determined as a function of the expected development density along the street". Cul-de-sacs in excess of this distance would need a variance. Recommendation: Amend Section 18-57 (k) to specify a maximum distance. The maximum length of a street terminating in a cul-de-sac shall be 800 feet. The length of the cul-de-sac shall be measured from the intersection of the centerlines of the cul-de-sac to the intersecting street to the centerpoint of the cul-de-sac. Issue: Streets that will be extended in the future with additional development may stay a dead- end for an extended period of time. In these instances, we want the developer to be aware that until the extension is made, a temporary turn around wiUbe necessary. Recommendation: Add new section 18-57 (t) Temporary cul-de-sacs must be constructed at all locations where a street stub will be constructed and will be extended in the future. The temporary cul-de-sac must be 90 feet in diameter and lie within platted right-of-way or easement. The developer must submit an escrow for the cost of removing the temporary cul-de-sac and vacating the easement (if applicable). (Note: Codification does not properly differentiate sections. 0) Private.streets-the numbering goes from 1) to 3), then goes 1) through 8). Weare notifying the codification firm to correct the numbering system. The second set of numbers should be included in subsection p and the subsections following will be re-Iettered.) Issue: Property owners are only responsible for utilities if they are private, e.g., service to the building or home. The city is respOnsible for public utilities Recommendation: Amend Section 18-57 (p) (8) Maintenance and repair of private utilities located within the private street shall be the responsibility of the benefiting property. Issue: Are lot sizes sufficient to accommodate the type of single-family detached housing we are seeing? (e.g., Lundgren Bros. has told us that their latest housing plan is 74 feet wide). This also relates to the issue in the zoning regarding lot width. Recommendations: Staff is proposing adding section 18-600) which shall read as follows: Planning Commission Amendments to Chapter 18, Subdivisions December 6, 2005 Page 3 Proposed house sizes shall be shown on the subdivision plan and shall be designed to accommodate residents' future house expansion (e.g., porches) and accessory structures (e.g., decks and patios) as well as the driveway and sidewalks to building entrances. If house plans are not known, then a 60-foot by 60-foot building pad and a 30-foot wide access driveway shall be used. The maximum permitted impervious surface shall be calculated for each lot and the .permittedhouses and structures shall be limited to those sizes. Issue: Requiring all trees six inches and larger to be inventoried as a part of development review is burdensome. The previous requirement of all trees twelve inches and larger left too many trees uninventoried. A minimum inventory size requirement of ten inches is recommended. Recommendation: Staff is recommending that the minimum diameter of trees to be inventoried be revised to ten (10) inches. Issue: In projecting populations for the Chaska school district, the demographer has stated that single-family detached housing has a larger persons-per-household than other housing types. Household are determined by the number of lots for single-family homes Recommendation: Staff is proposing amending Section 18-79 (i) to increase the persons per household for single family homes from 3 to 3.5 persons per household and to clarify that the persons per household for two-family homes are determined by the number of dwelling units, not lots. Issue: Inconsistency of collection of park fees between Chapter 4 and Chapter 18. Recommendation: Amend Section 18-79 (p) - park fees are due at time of final platting, consistent with Chapter 4 ofthe Chanhassen City Code. RECOMMENDATION Staff recommends that the Planning Commission adopt the following motion: "The Chanhassen Planning Commission recommends approval of the attached ordinance amending Chapter 18, Subdivisions, ofthe Chanhassen City Code." ATTACHMENTS Ordinance Amending Chapter 18, Subdivisions,of the Chanhassen City Code g:\plan\bg\city code\pc memo chapter 18 2005.doc CITY OF CHANHASSEN CARVER AND HENNEPIN COUNTIES, MINNESOTA ORDINANCE NO. AN ORDINANCE AMENDING CHAPTER 18, SUBDIVISIONS, CHANHASSEN CITY CODE, THE CITY COUNCIL OF THE CITY OF CHANHASSEN, MINNESOTA ORDAINS: Section 1. Sectidn 18-40(2) g of the City Code, City ofChanhassen, Minnesota, is hereby amended to read as follows: Location, size and approximate grade of proposed public sewer and water mains. If public sewer is not available, the developer shall provide community sewage treatment system (CSTS) for subdivisions in excess of two lots. If public sewer and water are not available, the developer shall provide site evaluation data required by "Minnesota Rules Chapter 7080 Individual Sewage Treatment Systems Standards" to determine the suitability of the site for individual sewage systems. The following data is required for reVIew: L Location of two drainfield sites per lot or per CSTS site. 2. Two soil borings on each drainfield site for a total of four soil borings per lot or per CSTS site. 3. No percolation tests are required for slopes between zero and 12 percent. One percolation test per drainfield site is required where the land slope is between 13 and 25 percent. Areas where the land slope exceeds 25 percent shall not be considered as a potential soil treatment unit site. The depth of the percolation test should be determined in the field by the site evaluator. 4. The infiltration area shall be based on the anticipated wastewater generated from all sources that could use the CSTS. 5. All plans for a CSTS shall be prepared by a licensed designer and qualified Minnesota Professional Engineer. Section 2. Section 18-40 (4) d of the City Code, City of Chanhassen, Minnesota, is hereby amended to read as follows: A proposed grading plan shown at contour intervals appropriate to the topography or spot elevations indicating the relationship of proposed changes to existing topography and rernaining features. (1) All proposed retaining walls must be shown on the plan. The top and bottom elevations of the wall must be noted. 1 (2) The preliminary and final grading plans must be 50 scale or larger. The grading plan must comply with the following design standards as well as the requirement of Chapter 7 of the Chanhassen City Code: a) The lowest floor elevation must be minimum 3 feet above the highest known .groundwater elevation and must meet the minimum requirements set forth in Section 20-481 (e) (1). b) The style of home (e.g., slab on grade, splitentry, lookout, walkout, full basement) must be noted on the plan. c) The standard lot benching detail for each proposed style of home must be shown. d) Drain tile service must be provided to all properties where runoff will flow from the back to the front of the lot. e) Identify proposed soil stockpile areas and note stabilization measures that will be taken. Section 3. Section 18-41 (a) (5) of the City Code, City of Chanhassen, Minnesota, is hereby amended to read as follows: A digital copy in .dxf format and a digital copy in .tif format of the final plat shall be submitted. The digital files must be in the current Carver County coordinate system. Section 4. Section 18-57 (k) of the City Code, City of Chanhassen, Minnesota, is hereby amended to read as follows: The maximum length of a street terminating in a cul-de-sac shall be 800 feet. The length of the cul-de-sac shall be measured from the intersection of the centerlines of the cul-de- sac to the intersecting street to the center point of the cul-de-sac. Section 5. The City Code, City of Chanhassen,Minnesota, is hereby amended by adding a section to be numbered 18-57 (t), which shall read as follows: Temporary cul-de-sacs must be constructed at all locations where a street stub will be constructed and will be extended in the future. The temporary cul-de-sac must be 90 feet in diameter and lie within platted right-of-way or easement. The developer must submit an escrow for the cost of removing the temporary cul-de-sac and vacating the easement (if applicable). Section 6. Section 18-57 (p) (8) of the City Code, City of Chanhassen, Minnesota, is hereby amended to read as follows: Maintenance and repair of private utilities located within the private street shall be the responsibility of the benefiting property. Section 7. The City Code, City of Chanhassen, Minnesota, is hereby amended by adding a section to be numbered 18-600), which shall read as follows: 2 Proposed house sizes shall be shown on the subdivisIon plan and shall be designed to accommodate residents' future house expansion (e.g., porches) and accessory structures (e.g., decks and patios) as well as the driveway and sidewalks to building entrances. If house plans are not known, then a 60 foot by 60 foot building pad and a 30 foot wide access driveway shall be used. The maximum permitted impervious surface shall be calculated for each lot and the permitted houses and structures shall be limited to those sizes. Section 8. Section 18-61(d) (2) of the City Code, City of Chanhassen, Minnesota, is hereby amended to read as follows: Prior to the submittal of development plans, a tree survey of the site shall be prepared by a registered landscape architect, licensed forester, or other professional approved by the city. This survey shall include the species, DBH size (DBH means diameter measured at breast height, four and five-tenths feet above the ground), condition, location of all trees over ten (10) inches in diameter and any damaged or diseased trees on site. All significant special, damaged or diseased trees shall be tagged and identified by number on the survey. A delineation of the existing canopy coverage area(s) which outlines all areas covered by tree canopy shall be included as part of the survey. Additionally, all damaged and diseased trees shall be cataloged with the nature and extent of any damage or disease specified. a. Based on this survey and either site observation and measurement or a current aerial photograph (taken within one year of the date of plan submittal) interpretation, the following shall be calculated: 1. Base line canopy coverage. 2. Minimum canopy coverage requirements. The following table shall be used to determine the minimum amount of canopy coverage that must be maintained or provided on-site as part of the development. It shall represent the minimum canopy coverage, consisting of existing tree canopy and/or additional trees required for the site. Existing wetland and bluff areas located on site shall be excluded from the calculation of site area in the determination of site coverage. If a forested area is to be dedicated to the city for park land, then this area shall not be included in the base line canopy coverage area calculation nor shall it count towards the minimum canopy coverage for the site. 3 edium density residential 19% or less omprehensive Plan Designation 80--100% Commercial/industrial/institutional 10% . gh density residential 15% ow density residential 5% arge lot residential 5% Base line canopy coverage is the canopy coverage existing at the time the development application is filed with the city. Minimum canopy coverage is determined by using the matrix. Priority shall he given to retaining stands of trees and undisturbed wooded lands over individual specimen trees that will be incorporated into the development. No more than ten percent of the canopy retention requirement may be met by an individual tree that is not included within a designated woodland area. For developments that do not meet the minimum canopy coverage, the developer shall be required to develop a planting plan to bring the total canopy coverage up to the minimum requirement. For development that removes canopy area or trees that would otherwise be used to meet the canopy coverage retention requirement, the developer shall develop a replacement plan. The replacement plan must designate an area at least one and two-tenths times the removed canopy coverage area that shall be planted with replacement trees for those removed. This plan shall locate additional trees either as a continuation of existing stands of trees that are to be preserved or create new stands of trees in desirable locations such as along roadway corridors, on the north and west perimeters of the development, in common open areas, or adjacent to park facilities. The following criteria shall be followed in establishing minimum canopy coverage: 4 1. When planting trees, one tree shall be deemed to provide 1,089 square feet of required canopy coverage; 2. Trees must be from the approved list of desirable species (preference given for trees designated as native); 3. No more than one-third ofthetrees may be from anyone tree species; 4. Trees shall average at least two-and-one-half-inch caliper and may be a minimum of one-and-one-half-inch caliper; 5. Not less than 20 percent of the trees shall be conifers; 6. Conifer trees shall average seven feet and shall be a minimum of six feet in height; 7. Plant materials used for the reforestation shall be of a similar species as vegetation found on site; 8. Trees shall be used that are appropriate to the soil conditions found on site; and' 9. Trees shall be from certified nursery stock as defined and controlled by M.S. ~ 18H.02. Section 9. Section 18-79 (i) of the City Code, City of Chanhassen, Minnesota, is hereby amended to read as follows: In residential plats, one acre of land shall be conveyed to the city as an Outlot by warranty deed for every 75 people the platted land could house based upon the following population calculations: Single-family detached dwelling per lot: 3.5 persons Two-family dwelling per dwelling unit: 3.0 persons Apartment, townhouses, condominiums and other dwelling units, per bedroom: 1.0 person Section 10. Section 18-79 (p) of the City Code, City of Chanhassen, Minnesota, is hereby amended to read as follows: Park dedication fees shall be paid at the time of final plat recording. 5 Section 11. This ordinance shall be effective immediately upon its passage and publication. PASSED AND ADOPTED this day of City Council of the City of Chanhassen, Minnesota , 2006, by the Todd Gerhardt, City Manager Thomas A. Furlong, Mayor (Published in the Chanhassen Villager on ) g:\pIan\bg\city code\amendment ordinance in 2005 ch IS.doc 6