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HomeMy WebLinkAboutObservation of Excavation Report 08.15.2022EngÍneering, Inc. CfVIVCBOTECHNICAL August 15,2022 John Chromy Clearwater Construction Management I l0 Quent El Jebel, CO 81623 i chroruv'@ c.$m,as$en. co m (970) 618-6607 RE: Open Hole Observation Eckley Master Addition Lot 1, The Ranch at Coulter Creek PUD 1 109 Cattle Creek Ridge Rd Carbondale, CO 81623 Garfield County Project No.2l-3522 Dear John, At your request on August 10.2022, we visited the construction site for the Eckley Residence Master Addition on Lot l, The Ranch at Coulter Creek PUD, 1 109 Cattle Creek Ridge Road, Carbondale, CO 81623, Garfield County. The purpose of our site visits was to observe andlor test the soil exposed in the foundation excavation in order to verify the design bearing capacity ofl l000psf, as shown the original soils report, prepared for the existing residence, project number 19-3377, dated November 15, 2019. The excavation for the proposed addition was on the east side of the existing residence, as shown on the plans by Clearwater Construction Management, Inc., dated 06/2212022, and on the structural drawings by Hein L. Brutsaert, PE, Silver Town Structures, job no. 22-02, dated 611012022. The overall excavation was about 67 feet wide and about 47 feet long. During the site visit we observed that the excavation was completed, except at the southwest and northeast corners, and at the building sewer line crossing, where the excavation needed to be extended down to yellowish silty clay. You emailed photographs of the completed excavation. Based on the photographs, we also recommended that the loose soil be removed from the excavation and the subgrade compacted, which was done as verified by the additional photographs that you texted. P.O. Box 724,Eagle CO, 81631 Tel: 970-390-0307 www.l-[dPEngincering.com Eckley Master Addition Page 2 of 2 August 15,2022 Project No.21-3522 The soil exposed in the completed foundation excavation for the master addition is suitable for the design bearing capacity of l000psf. Perimeter drains disturbed during the excavation must be repaired, extended, and rerouted around the addition as necessary. Surface water naturally draining toward the proposed foundation should be diverted around and away from them by means of drainage swales or other approved methods. The roof drains and downspouts should extend and discharge beyond the limits of the backfill. Changes in moisture content can cause settlement of the subgrade which will have a damaging effect on the structure. We are not responsible for technical interpretation by others of the data presented in this report. This report has been prepared according to locally accepted Professional Geotechnical Engineering standards for similar methods of testing and soil conditions at this time. The fìndings and recommendation stated above are based on the soil conditions observed and tested in the foundation excavation for the addition only on the dates speciflred above. Geologic hazard studies are outside of our scope of services. There is no other waruanty either expressed or implied. If you have any questions, please do not hesitate to call. Sincerely, LKP Engineering,Inc. Luiza Petrovska, PE 5Í2422 {rrçnV J:\ WP X4-LKP\ 202IU|-3522OPEN-MASTER ADDITION.DOCX LKP Engineering, Inc.