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Home My WebLink AboutB23-2219 040-120-036 Geo Report f.. W. GILBERT ENGINEERING 140 Yellowstone Drive, Suite 110 • Chico, CA 95973 Civil Engineering / Land Surveying Phone: (530} 809-1315 • Fax: (530) 588-9030 www.wgilbertengineering.com August 15, 2023 County of Butte Butte County Fire Department Fire Prevention Bureau 176 Nelson Avenue Oroville, CA 95965 Attn: Chris Boyd Subject: Building Permit Number B23-2219, Plan Check #1 Dear Chris: Two (2) copies of the fire hydrant plan for Old Durham Wood are enclosed. The plans were revised consistent with the fire hydrant plans approved by the County for the first phase of the Old Durham Wood project in 2017. A soils report has not been prepared for the site. The soil below the site consists of deposits of the "Doemill-Jokerst" soils that consist primarily of bedrock that has a compressive strength of more than 3,500 psi. See attached soil data sheet from the NRCS. The applicant is supplying that manufacturer's data sheets via a separate submittal. Please review and attachments and let us know if you have any comments or need additional information. Thank you. Sincerely, W. Gilbert Engineering • Wesley E. bert, .E. ` R.C.E. 3 89 • President, W.G. Civil Engineers, Inc. dba W. Gilbert Engineering REVIEWED BY LIFE SAFETY OFFICER Enclosures BUTTE CO. FIRE DEFT. • approved as submitted Cc: Tim Merrill ❑ approved with conditions per ache ' - P:\O1 Project Folders\1022 -Old Durham Wood MUP\OEng\Correspondence\Fire Hydrant Submittal Letter 081523.docx Map Unit Description: Doemiil-Jokerst, 0 to 3 percent slopes---Butte Area,California,Parts of Butte and Plumas Counties Butte Area, California, Parts of Butte and Plumas Counties 614—Doemill-Jokerst , 0 to 3 percent slopes Map Unit Setting National map unit symbol: hgzk Elevation: 160 to 520 feet Mean annual precipitation: 25 to 29 inches Mean annual air temperature: 61 to 63 degrees F Frost-free period: 250 to 255 days Farmland classification: Not prime farmland Map Unit Composition Doemill, gravelly loam, and similar soils: 50 percent Jokerst, very cobbly loam, and similar soils:40 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Doemill, Gravelly Loam Setting Landform: Ridges Landform position (two-dimensional): Summit Landform position (three-dimensional): Crest Micro features of landform position: Mounds Down-slope shape: Linear Across-slope shape: Linear Parent material: Loamy residuum weathered from volcanic breccia Typical profile A - 0 to 1 inches: gravelly loam Bt1 - 1 to 5 inches: gravelly loam Bt2- 5 to 9 inches: gravelly loam Bt3 - 9 to 14 inches: gravelly loam R - 14 to 24 inches: bedrock Properties and qualities Slope: 0 to 3 percent Surface area covered with cobbles, stones or boulders: 5.0 percent Depth to restrictive feature.' 10 to 20 inches to lithic bedrock Drainage class: Somewhat poorly drained Runoff class: Very high Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.43 to 1.28 in/hr) Depth to water table: About 2 to 20 inches Frequency of flooding: None Frequency of ponding: None Available water supply, 0 to 60 inches: Very low (about 2.1 inches) Lsi)\ Natural Resources Web Soil Survey 8/1612023 1-000 Conservation Service National Cooperative Soil Survey Page 1 of 3 Map Unit Description: Doemill-Jokerst,0 to 3 percent slopes---Butte Area, California, Parts of Butte and Plumes Counties Interpretive groups Land capability classification (irrigated): 6s Land capability classification (nonirrigated): 6s Hydrologic Soil Group: D Ecological site: R018XA101 CA- Basalt Flow Plateaus Hydric soil rating.- No Description of Jokerst, Very Cobbly Loam Setting Landform: Ridges Landform position (two-dimensional): Summit Landform position (three-dimensional): Crest Micro features of landform position: Swales Down-slope shape: Linear Across-slope shape: Linear Parent material: Loamy residuum weathered from volcanic breccia Typical profile A - 0 to 1 inches: very cobbly loam 8t- 1 to 4 inches: gravelly loam R - 4 to 14 inches: bedrock Properties and qualities Slope: 0 to 3 percent Surface area covered with cobbles, stones or boulders. 17.0 percent Depth to restrictive feature: 2 to 10 inches to lithic bedrock Drainage class: Poorly drained Runoff class: Very high Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.71 to 1.13 in/hr) Depth to water table:About 0 to 10 inches Frequency of flooding: NoneFrequent Frequency of ponding: Frequent Available water supply, 0 to 60 inches: Very low (about 0.4 inches) Interpretive groups Land capability classification (irrigated): 8 Land capability classification (nonirrigated): 8 Hydrologic Soil Group: D Ecological site: R018XA101CA- Basalt Flow Plateaus Hydric soil rating: No Minor Components Rock outcrop, mudflow breccia Percent of map unit: 5 percent Landform: Ridges Hydric soil rating: No Lithic xerorthents Percent of map unit: 3 percent Landform: Ridges USDA Natural Resources Web Soil Survey 8/16/2023 Conservation Service National Cooperative Soil Survey Page 2 of 3 Map Unit Description: DoemiU-Jokerst,0 to 3 percent slopes--Butte Area, California, Parts of Butte and Plumas Counties Hydric soil rating: No Unnamed, frequent long ponding Percent of map unit: 2 percent Landform: Ridges Microfeatures of landform position:Vernal pools Hydric soil rating: Yes Data Source Information Soil Survey Area: Butte Area, California, Parts of Butte and Plumes Counties Survey Area Data: Version 20, Sep 6, 2022 uSrm Natural Resources Web Soil Survey 8/16/2023 Conservation Service National Cooperative Soil Survey Page 3 of 3