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HomeMy WebLinkAboutA002 - Council Action Form dated October 24, 1989 ITEM #: �Yq DATE: 10/24/89 COUNCIL ACTION FORM SUBJECT: Resolution Approving an Amendment to the CDP/PUD, a Replat of Lots 24 and 25, Gateway Hills Subdivision. BACKGROUND: The existing approved PUD for Gateway Hills allows a total of eight (8) single-family attached (townhouse) units on Lot 24 and nineteen (19) single-family attached units on Lot 25 of the Gateway Hills Subdivision. These lots are located on the west side of Big Bluestem Court and east of Mortensen Parkway. The developer is proposing a replat of Lots 24 and 25 and an amendment to the Gateway Hills PUD to create six (6) single- family detached lots and one (1) single-family attached lot to accommodate • six (6) townhomes. The six (6) townhomes are existing on the proposed Lot 7. Land Use Policy Plan. The existing Land Use Policy Plan (LUPP) desig- nates Lot 24 and 25 of Gateway Hills Subdivision as suitable for low-densi- ty residential development (1-9 units/acre). Zoning Ristory. Lots 24 and 25 of Gateway Hills Subdivision have been zoned R-2 since 1976 when a PUD Plan was approved for the Gateway Hills Subdivision. The entire Gateway Hills PUD has a combination of R-2, 111-10, and A-1 zoning. The lots originally designated for single-family detached units and the former Country Club site were zoned R-1 in 1976; the remainder of the residential lots were zoned R-2 and the remaining land, designated for parks and open space, was zoned A-1. In the past, PUD plans and plan amendments were approved by resolution. As a part of this PUD plan amendment, the PUD overlay for the entire Gateway Hills PUD will be approved by Ordinance so that the PUD desig- nation will appear on the Official Zoning Map and the designation will become a part of property records for each piece of property in the Gateway Hills PUD. Utilities. Water: There is a six-inch water main in Big Bluestem Court and an eight-inch water main in Mortensen Parkway. Proposed Lots 1, 2, • 4, 5, and 6 will be served from the main in Big Bluestem Court and proposed Lot 3 will receive service from the main in Mortensen Parkway. Service is already existing for Lot 7. 2 Sanitary Sewer: There is an eight-inch sanitary sewer main in Big Bluestem Court and an eight-inch sanitary sewer in Mortensen Parkway. Proposed Lot 3 will get sanitary sewer service from the main in Mortensen Parkway and the remainder of the lots to be developed will receive service from the main in Big Bluestein Court. Storm Sewer: The existing storm water detention plan remains in effect for proposed Lots 1-3; a modified storm water detention plan has been reviewed and approved by the Municipal Engineer for proposed Lots 4-7. Streets and Vehicular and Pedestrian Access. The proposed Big Bluestem Subdivision is bounded on the north by Ash Avenue, on the west by Mortensen Parkway, and on the south and east by Big Bluestem Court. No access to any of the proposed lots will be permitted from Mortensen Parkway since this is an arterial street. The proposed Lots 2 and 3 will be accessed from Ash Avenue. The centerline of the proposed driveway for Lot 3 will be a minimum of 80 feet from the lot corner at the intersec- tion of Ash Avenue and Mortensen Parkway in order to preserve sight distances and enhance safety. As the proposed lots develop, the existing sidewalk on the west side of Lot 7 will be extended to Ash Avenue. There is also an existing sidewalk along the east side of Big Bluestem Court to provide pedestrian access for persons living along Big Bluestem Court. Density. The proposed changes in the PUD will result in a 52 percent • reduction in density for Lots 24 and 25 of Gateway Hills. EXISTING ]KAXIMUM ALI,ONABLE DENSITY Lot 24 -- 8 single-family attached (townhomes) Lot 25 -- 19 single-family attached (townhomes) 27 dwelling units PROPOSED MAXIMUM ALIDNABLE DENSITY Proposed Lots 1-6 -- 6 single-family detached units Proposed Lot 7 -- 6 single-family attached (townhomes) 12 dwelling units UNITS PER ACRE (Lots 24 and 25, Gateway Hills) Existing -- 7.3 dwelling units/acre Proposed -- 3.2 dwelling units/acre The developer has submitted a revised PUD site plan indicating the maxunum allowable densities for each lot that remains as a platted lot in the Gateway Hills Subdivision and for each parcel within the Gateway Hills PUD that has been subsequently replatted. This document will provide an updated record of the current status for each existing lot and each • replatted parcel. Maximum allowable densities, structure types, maximum height, and minimum building setbacks along specific streets are indicated on this plan. y c 3 Landscaping. The intent of the original landscape plan for Gateway Hills on Lots 24 and 25 was to provide street tree plantings of native species. The existing plantings will be maintained on the area to be replatted where possible, although some trees in the right-of-way along Ash Avenue may have to be removed for driveway accesses. The developer has indicated that seven (7) additional overstory shade trees will be planted along Mortensen Parkway on proposed Lots 3, 4, and 5. Architectural Elevations. No architectural elevations have been submitted, since the proposed development on Lots 1-6 will be conventional single- family homes. Design for these homes will be chosen by the individual homeowners. The construction on Lot 7 has been completed. Avigation Easement. Because of the proximity to the Ames Municipal Airport, an avigation easement is necessary for the subdivision. This easement must be recorded prior to the approval of the Administrative Plat. ANALYSIS: The proposed replat of Lots 24 and 25 of Gateway Hills into six (6) single-family lots and one lot for the existing townhouse development is consistent with the general development in the area. The east side of Big • Bluestem Court has been developed with single-family detached homes on individual lots with conventional setbacks. The lot sizes for the single- family detached home sites range in size from 17,252 square feet to 21,678 square feet. The lot sizes are consistent with the size of the lots to the east, although the configurations are somewhat different due to the shape of the land that is being replatted. Planning and Zoning Commission Recommendation. The Planning and Zoning Commission reviewed this request at their meeting of October 4, 1989, and recommended that it be approved. ALTERNATIVES: 1. The City Council can approve of the amendment to the CDP/PUD for Gateway Hills Subdivision, a replat of Lots 24 and 25, to allow six single-family detached units and six single-family attached (town- house) units with the stipulation that an avigation easement be recorded prior to approval of the Administrative Plat. 2. The City Council can deny approval of the amendment to the CDP/PUD for Gateway Hills Subdivision, a replat of Lots 24 and 25. 3. The City Council can refer this request back to the staff and the Planning and Zoning Commission for additional information. • 4 MANAGER'S RECOMMENDED ACTION: i It is the recommendation of the City Manager that the City Council adopt Alternative #1. This will approve of the amendment to the CDP/PUD for the Gateway Hills Subdivision, a replat of Lots 24 and 25, with the stipulation that an avigation easement be recorded prior to the approval of the Administrative Plat. COUNCIL ACTION: \bpo\caf\bluestem.o24 • •