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HomeMy WebLinkAboutFile Documents.975 King St.0043-2020-BRES (32)P.O. Box 3901 Eagle, Colorado 81631 YARNELL CONSULTING & CIVIL DESIGN, LLC (970) 323-7008 · 8/14/2020 229 Midland Ave. Basalt, Colorado 81621 975 King Street (Parcel 3, Boundary Agreement Plat [Book 13, Page 35]) Page 1 of 2 Jack Danneberg City of Aspen Engineering Department 201 N. Mill Street, Suite 101 Aspen, Colorado 81611 Jack.Danneberg@CityOfAspen.com Subject: 975 King Street (Parcel 3, Boundary Agreement Plat [Book 13, Page 35]) Variance Request for Horizontal Separation Between Water & Sewer Utilities Jack: I have been in discussions and meetings with the city’s engineering and parks departments regarding the redevelopment of 975 King Street (Parcel 3, Boundary Agreement Plat [Book 13, Page 35]). This project requires new wet (sanitary sewer and water) and dry (natural gas, electric, communication, and cable) utilities be constructed within a 20-foot utility easement across an adjacent property (Lot 1). Unfortunately, numerous large trees on Lot 2 immediately adjacent to said easement limit the ability to utilize the full 20-foot-width to root zones. An extensive quantity of correspondence has occurred between me, city parks, city engineering, and Aspen Consolidated Sanitation District to develop utility designs that strive to accomplish every stakeholder’s requirements. The current horizontal layout reflects these discussions. The locations of the dry utilities and private sanitary sewer main has been set based upon excavation constraints along the west side of the easement. The location of the water services has been set based upon the constraints imposed by the root systems of the existing trees east of the easement. We have maximized the separation of the water and sewer utilities to the maximum extent possible. In accordance with Section 3.2.7 of the city’s Water Distribution Standards, at least 10 feet of separation shall be provided between water and non-potable utilities. In this instance, just 6.5 feet is possible. We are proposing to construct the sanitary sewer utilities with C900 PVC in an effort to protect the water services from contamination. Since the separation between the proposed water and sanitary sewer utilities is less than that mandated by city standards, I am hereby requesting a variance for this project so that we can follow the city’s request. The following reflect the “Variances” procedure identified within Section 29.01.060 of the City of Aspen Municipal Code. 1. Identify the criteria from which the applicant seeks a variance. Due to the constraints being imposed on this project site and to meet the request of the city’s water department, I am seeking a variance from Section 3.2.7 of the city’s Water Distribution Standards which says water and non-potable utilities must be separated by at least 10 feet. P.O. Box 3901 Eagle, Colorado 81631 YARNELL CONSULTING & CIVIL DESIGN, LLC (970) 323-7008 · 8/14/2020 229 Midland Ave. Basalt, Colorado 81621 975 King Street (Parcel 3, Boundary Agreement Plat [Book 13, Page 35]) Page 2 of 2 2. Provide a written justification outlining why the criterion cannot be met. As stated previously, the requisite 10 feet of horizontal separation between water and sewer utilities cannot be accomplished due to the narrow utility easement and encumbrances imposed by existing trees. 3. Identify an alternate criteria or standard that is proposed to comply with the intent of the criteria from which the variance is sought. At crossing locations, it is standard practice to either construct the non-potable utility with C900 PVC or encase the pipe in concrete. 4. Provide supporting documentation, including necessary calculations. Not applicable. 5. Provide an explanation of any potential adverse impacts of the proposed variance to adjacent landowners. I do not foresee adverse impacts of this construction for adjacent landowners. I appreciate your understanding of the difficult constraints imposed by this site and your willingness to accept this variance request so we might meet the water department’s recommended utility layout. Do let me know if you have any questions. Sincerely, Justin J. Yarnell, PE Colorado PE Number 47241 Reviewed by Engineering 12/17/2020 1:40:19 PM "It should be known that this review shall not relieve the applicant of their responsibility to comply with the requirements of the City of Aspen. The review and approval by the City is offered only to assist the applicant's understanding of the applicable Engineering requirements." The issuance of a permit based on construction documents and other data shall not prevent the City of Aspen from requiring the correction of errors in the construction documents and other data.