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HomeMy WebLinkAboutFile Documents.124 W Hallam St.0025.2017 (4).ARBKMarkup Summary Page: 1 Author: jackd File Name: 124 W. Hallam St. - Varience Request.pdf Variance must be approved and stamped by geotechnical engineer. 124 W. Hallam St. - Varience Request.pdf (1) Page: [3] C.1.002 DEMO PLAN Author: jackd File Name: CIVIL DRAWIGS_REVISION 1.2017.06.29.pdf Still need an excavation and stabilization plan. CIVIL DRAWIGS_REVISION 1.2017.06.29.pdf (2) Page: [11] C.1.010 CROSS SECTIONS Author: jackd File Name: CIVIL DRAWIGS_REVISION 1.2017.06.29.pdf No variance will be granted for discharging impervious area onto neighboring property without a drainage easement. 124 W. Hallam St. Jack, I am requesting a variance for 124 W. Hallam St. regarding the Drywell setbacks from the south property line and the prosed structures foundation. Criteria from which the applicant seeks a variance. In section Section 8.5.4.2- of the City of Aspen’s Urban Runoff Management Plan: “Drywells – Physical Site Suitability” it states that dry wells must be located at least 10 feet from building foundations. The design engineer shall evaluate potential impacts of infiltrated runoff on nearby foundations even when spacing from the foundation is greater than 10 feet. Justification for not complying with the criteria Due to the limited size of the lot, 6000 sf (60’ x100’), there is limited room for drainage infrastructure after the structure had been designed. To meet all the setbacks would vacate a vast portion of the lot limiting the square footage for the structure. With such high prices per square foot in this area, it is beneficial to the client to maximize the allowable structure square footage. The 10’ set back will be satisfied for the property line boarding the neighbor. The drywell will be up against the ROW and about 5’ away from the foundation. PVC liner will be used around the side of the drywell facing the foundation to prevent infiltration toward the structure. This drywell is also sized for total detention so no over flows will occur during the 100 year events. This total detention requirement has also increased the drywell’s diameter further increasing the setback area. Supporting Documentations See the Civil Set included with this submittal. Potential adverse impacts for proposed variance and alternate criteria on downstream water bodies public and private. City of Aspen Received 06/23/17 Building Department Variance must be approved and stamped by geotechnical engineer. No variance will be granted for discharging impervious area onto neighboring property without a drainage easement. INCLUDED PLEASE SEE CIVIL DRAWING C.1.010. INCLUDED IS A TRENCH DRAIN WHICH HANDLES DRAINAGE - WATER WILL NOT BE DISCHARGED ONTO NEIGHBORING PROPOERTY. (ALSO, CLIENT OWNS NEIGHBORING PROPERTY) SEE SIGNED/STAMPED VARIANCE LETTER. SEE ALSO REVISED STRUCTURAL SHEETS S-120 AND DETAIL 4 ON S-400 WITH WATERSTOP AT FOUNDATION NEAR DRYWELL (PER GEOTECH LETTER) 09/14/2017