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HomeMy WebLinkAboutresolution.apz.002-93RESOLUTION OF THE ASPEN PLANNING AND ZONING COMMISSION GRANTING STREAM MARGIN APPROVAL FOR THE INSTALLATION OF THREE BRIDGES CONNECTING THE CITY OWNED MEADOWS PROPERTY AND RIO GRANDE TRAIL, ASPEN COLORADO Resolution No. 93- ~ WHEREAS, the Aspen Planning and Zoning Commission held a meeting September 22, 1992; and WHEREAS, the Commission reviewed an application for a stream margin review for the construction of three pedestrian/bike bridges, two crossing the Roaring Fork River between the Meadows property and the Rio Grande Trail and one crossing Castle Creek connecting recently purchased Meadows property; and WHEREAS, pursuant to Section 24-7-504 development within 100 feet. from the high water line of the Roaring FOrk River and its tributary streams, or within the one hundred year floodplain is required to undergo Stream Margin Review; and WHEREAS, the Planning staff reviewed the application and recommended approval with conditions; and WHEREAS, the Commission reviewed the application, heard plenty of public comment and amended the conditions of approval to include' 6. Prior to construction of the Castle Creek bridge, easements out of the City owned property shall be acquired. The Castle Creek bridge shall be narrower than 10 feet. 7. Prior to construction of the Castle Creek bridge, the Planning and Zoning Commission shall review the trail and wildlife management plan to the area. Resolution No. 92- Page 2 NOW, T}{EREFORE, BE IT RESOLVED by the Commission that it does hereby grant stream margin approval for three bridges on the City owned Meadows property, two crossing the Roaring Fork River and one crossing Castle' Creek with the following conditions- 1. Conditions for all three bridges prior to construction' a. A construction and site drainage plan and procedure must be submitted and approved to the engineering department. The construction procedures employed must be such that no runoff from rain or snowmelt be permitted to drain to the river from contact with the disturbed earth. The construction procedure used will in no way impact the river. b. Tree removal permits are required from the Parks Department before any trees greater than 6" in caliper may be removed. c. Necessary permits, or written acknowledgement that a permit is not required, shall be obtained from the Army Corps of Engineers and/or the Department of Wildlife and provided to the engineering department. d. The engineering department recommends that either a subsurface soils exploration report or visual inspection of excavation be performed by a registered soils engineer to determine sufficient bearing capacity for the designed concrete structures. e. Stamped drawings by design engineer must be submitted. f. Additional information is required for item 5 of the application regarding the retention of storm runoff. In addition storm runoff from the trail should be addressed on how it is maintained and prevented from entering the river. 2. Conditions for all three bridges' a. As the drawings indicate, construction staking must be in place before commencement of construction confirming that the bridges are located on the properties indicated in the application. Upon completion of the bridges an as-built mylar must be submitted to the engineering department~prepared by a registered land surveyor, that includes new easements, and bridge locations in relation to property boundaries. Resolution No. 92-___ Page 3 b. Inspections and testing shall be performed at the direction of the engineer. It is recommended that inspections be performed prior to the placement of concrete, for the placement of concrete and for any compaction of backfill. It also recommended that testing be performed for concrete strength and density of compaction. c. The applicant is required to plant any regraded or disturbed area with species keeping with the Roaring Fork Greenway Plan as well as existing plants in the area. 3. Specific conditions for Picnic Point- a. While the drawings indicate that the new trail grade and construction access is to be a maximum of 6%, the grade as the trail is now aligned appears to exceed' 12%. The engineer shall comment that the new trail and construction access can be constructed to a maximum grade of 6% within the project boundaries. b. It needs to be demonstrated that the proposed development will not increase the base flood elevation. This shall be demonstrated by an engineering study prepared by a professional engineer registered to practice in the State of Colorado which shows that the base flood elevation will not be raised, including but not limited to, proposing mitigation techniques on or off site which compensate for any base flood elevation increase caused by development. c. The construction site drainage plan and procedure shall particularly address how it will maintain the existing slope and vegetation at the south abutment as indicated on the profile view looking downstream. It appears that it will be difficult to prevent the erosion or sloughing of this bank during the course of construction. e. The City shall obtain a Trail Easement from the County for the bridge crossing the Roaring Fork River. 4. Specific conditions for Grindley Bridge- a. The bridge is conceptually approved. Final approval is reserved upon review of construction drawings. All conditions as stated above shall apply with the exception of 3.b and 3.c; assuming that the construction drawings also indicate the bridge to be above the 100 year flood plain. b. The City shall obtain a Trail Easement from the County for the bridge crossing the Roaring Fork River. Resolution No. 92- Page 4 5. Ail representations that have been made in the application and during the presentation shall be adhered to. 6. a. The Castle Creek bridge shall be narrower than 10 feet. b. Prior to construction of the Castle Creek bridge, the Planning and Zoning Commission shall review the trail and wildlife management plan for the closed area across Castle Creek. APPROVED by the Commission at its regular meeting on September 22, 1992. ASPEN PLANNING AND ZONING COMMISSION ATTEST: