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HomeMy WebLinkAboutObservation of Excavation 03.11.2025 5020 County Road 154 Glenwood Springs, CO 81601 phone: (970) 945-7988 fax: (970) 945-8454 email: kaglenwood@kumarusa.com www.kumarusa.com Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado March 11, 2025 Daniel Bucio 1160 Ballard Avenue Silt, Colorado 81652 mdconstructionllc14@gmail.com Project No. 19-7-124 Subject: Observation of Pit Excavations for Bearing Soils of the Shop Building, Amended Tract 36, Antlers Orchard, 239 LaFrenz Lane, Garfield County, Colorado Daniel: As requested, a representative of Kumar & Associates, Inc. observed the pit excavations at the subject site on March 10, 2025, to evaluate the soils exposed, for foundation support. The findings of our observations and recommendations for the foundation design are presented in this report. We previously conducted a subsoil study for design of foundations at the site and presented our findings in a report dated March 12, 2019, Project No. 19-7-124. The shop building foundation is constructed as a monolithic slab with a turn-down perimeter edge. A shallow foundation placed on the natural soils and sized for an allowable bearing pressure of 1,500 psf were recommended as the foundation support. At the time of our visit to the site, two pits had been excavated 3 feet deep adjacent to the northwest and southeast corners of the building. The soils exposed in the bottom of the pits consisted of very sandy silt of fine to coarse sand size. No free water was encountered in the pits and the soils were slightly moist. The soil conditions exposed in the pit excavations are consistent with those previously encountered on the site and suitable for support of a shallow foundation designed for the recommended allowable bearing pressure of 1,500 psf with a risk of settlement. The soils tend to settle when wetted and precautions should be taken to keep the bearing soils dry. Other recommendations presented in our previous report which are applicable should also be observed.