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HomeMy WebLinkAboutFile Documents.700 Gillespie St.0129.2018 (37).ACBKPATTILLO ASSOCIATES ENGINEERS, INC. S T R U C T U R A L C O N S U L T A N T S 1215 grand avenue, post office box 751 glenwood springs, colorado 81602 phone (970) 945-9695 e-mail: info@paengineers.com January 27, 2019 Harry Teague Architects 129 Emma Road, Ste A Basalt, CO 81621 Attn: Jeffrey Woodruff, Project Architect Re:Aspen Center for Physics Pavilion Roof PAE Project 18023 To Whom It May Concern: Based on information and recommendations provided by Hepworth-Pawlak Geotechnical, Inc., in a report dated August 29, 1995, regarding Recommendations for Foundation Drain and Dry Well Discharge, Proposed Aspen Center for Physics, 600 West Gillespie Street, Aspen, Colorado, (see attached), it is my professional opinion that the use of a drywell discharge for roof and site drainage is appropriate for the proposed improvements included with the proposed Pavilion Roof project, under the condition that the drywell be located a minimum distance of 15 feet from any structural foundation element. The Typical Dry Well Detail drawing provided with their report (Figure 1) should be implemented for construction. During construction, the soils for the drywell excavation should be inspected and approved by a geotechnical engineer to verify conformance with stated conditions in the report. If flow and absorption rates require confirmation, a civil engineer should be consulted. Sincerely, Robert M. Pattillo, P.E. Principal Engineer RMP email copy:Jeffrey Woodruff (jeffrey@teaguearchitects.com) HEPWORTH-PAWLAK GEOTECHNICAL, INC. MZB Road 154 Glcmvo Springs, CO BIWI /�- rax 970 94541St Thane 9]0 %4 79N August 29, 1995 Harry Teague Architects Attn: Brad Zeigel 412 North Mill Street Aspen, Colorado 81611 Job No. 195 415 Subject: Recommendations for Foundation Drain and Dry Well Discharge, Proposed Aspen Center for Physics, 600 West Gillespie Street, _ Aspen, Colorado Dear Mr. Zeigel: As requested, we have reviewed the project information provided and discussed with you the proposed foundation drain and dry well disposal at the subject site. A subsoil study for foundation design was conducted by Huntingdon Engineering and Environmental and their findings presented in a report dated January 31, 1995, Job. No. 4 15995. The proposed building will have a basement area of 4,200 square feet at the northwest end. The rest of the building will have slab -on -grade Floor level near the existing ground surface. The boring logs by Huntingdon show the subsurface profiles to be somewhat erratic, with silty sand below about 13 feet in the proposed basement area. No free water was found to the maximum boring depth of 21 feet. The basement area of the building will be protected again temporary seasonal perched conditions. The remaining building should not need a perimeter subdrain, since there is no below grade floor level to protect. A dry well is proposed for the basement foundation drain, since daylight gravity discharge is not practical. - Based on the proposed construction, the subsoil profiles provided, and our experience in the area, a dry well should be acceptable for the foundation drain disposal. The drainage characteristics of the upper gravels is assumed to he relatively good and the, - underlying silty sands to be moderate. We should evaluate the actual subsoils encountered in the dry well excavation at the time of construction. . Harry Teague Architects August 29, 1995 Page 2 A typical detail of a dry well is shown on Fig. 1 attached. The well should be placed inside the basement, with a cover for future access and maintenance. If building plans or dry well use change from those described in this report, we should be contacted for review and additional comments. If you have any questions or if we can be of further assistance, please let us know. HEPWORTH-PAWLAK GEOTECHNICAL, INC. Steven L. Pawlak, P.E. SLP/kmk attachment Inspection/Access Cover Finished Floor Compacted Backfill Filter Fabric Inlet Pipe —T Perforated Concrete Pipe 3/4" - 1 112" °po oe a'i 3' Minimum Screened Rock OQ°oa°o c qI u1 n °o�aro oe� 3 - DRY DRY WELL SCHEMATIC NOT TO SCALE 195 415 HEPWORTH-PAWLAK Typical Dry Well Detail ri 1 GEOTECHNICAL, Inc. 9'