HomeMy WebLinkAboutAs-constructed Oil Sand Detention Tank 10.13.2020October 13, 2020
Brad Zeigel, AIA, Principal
A4 Architects, LLC
242 North Seventh Street
Carbondale, CO 81623
Jim Wilson, Building Inspector
108 8th Street, Suite 401
Glenwood Springs, Colorado 81601
RE: CRFPD Station 84, As -Constructed —Oil Sand Detention tank, Surface Grading and Drainage Systems,
Serving Expansion of Existing Fire Station Facility at 5449 C.R. 154, Garfield County.
SE Job No. 19211.01, Parcel No. 239501400136 County Building Permit BLCO-05-20-6271
Dear Gentleman:
Pursuant to discussions with and the request by the Garfield County Building Department Inspector about the
inspection process for the sand and oil interceptor and dry drainage basin, this letter provides documentation
that the As -Constructed —Oil Sand Detention tank, Surface Grading and Drainage Systems recently installed at the
above referenced site is in compliance with the permitted design. Sopris Engineering inspected the excavations,
soils, oil/sand tank, drywell basins, piping, backfill materials and the installation of the system components. Various
inspections were performed during construction, prior to final backfill and after all installations were completed in
coordination with the Earth moving contractor, Holmes Excavation and the general contractor, PNCi Construction,
Inc. Sopris Engineering performed a final inspection of the drainage systems and completed access drives and
parking areas today.
The as -constructed grading and drainage conditions associated with the driveways, parking area and installation of
the floor and surface drainage management system components is in compliance with Garfield County Regulations;
the recommendations and specifications delineated on the civil C3 Grading and Drainage Plan Permit/Construction
drawing dated 05-08-2020 and the final revised 100% CD version of the same C3 Grading and Drainage Plan
drawing dated, 07-31-20 by Sopris Engineering.
Based on final Inspections by Sopris Engineering, the As -Constructed location and functionality of the access
driveways, parking areas and all the proposed asphalt and concrete apron areas are determined to be safe and
adequate having been constructed as designed.
Sincerely,
SOPRIS ENGINEERING, LLC
Paul E. Rutledge
Design Engineer
Q:1191192111drainage oil sand constr119211-As-Constructed letter OS GradingDrain Systems .doc
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