HomeMy WebLinkAboutFile Documents.124 W Hallam St.0025.2017 (59).ARBK H-p Ku MAR 5020 County Road 154
Glenwood Springs, CO 81601
Geotechnical Engineering I Engineering Geology Phone:(970)945-7988
Materials Testing I Environmental Fax: (970)945-8454
Email: hpkglenwood@kumarusa.com
Office Locations: Denver(HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, Summit County, Colorado
August 24, 2017
Bill Guth
124 West Hallam Street
Aspen, Colorado 81611
bill@wngroup.com Project No. 17-7-628
Subject: Review of Drywell Detail, Proposed Residence, 124 West Hallam Street, Aspen,
Colorado
Gentlemen:
As requested by Andrew Green of RO/Rockett Design, we have reviewed the drywell detail
provided to us in the Roaring Fork Engineering sheet C.1.009 dated August 22, 2017.
Hepworth-Pawlak Geotechnical (now H-P/Kumar)previously conducted a subsoil study for
design of foundations at the site and presented the findings in a report dated September 25, 2015,
Job No. 115 400A.
The drywell is proposed in the southeast corner of the lot. The residence will have a basement
level with the foundation wall located about 5 feet from the proposed drywell. The perforated
section will begin at footing bearing level and be 4 feet long. A PVC membrane will be
provided vertically between the drywell and the foundation.
The drywell construction detail is acceptable with precautions to prevent undermining of the
bearing soil and to prevent drywell water discharge into the building foundation drain. The
foundation drain will need to be located on top of the footing for about 10 feet in both directions
from the drywell. Consequently, the foundation wall and footing joint will need to be watertight.
The natural soils are relatively dense and should not be adversely affected by water flow from
the drywell below the building or the adjacent property.
If you have any questions or need further assistance,please call our office.
Sincerely,
H—P KUMAR d� _
Steven L. Pawlak. P.1✓:3 5`{1 7 ��..� '.
RECEIVED
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cc: RO/Rockett Dent A Teen (aagreen@rorockettdesign.com) 09/15/2017
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Roaring Fork Engineering—Tyler Stevens (tvlers@rfeng.biz) ASPEN
BUILDING DEPARTMENT