127EAV26Q0123 Grapevine Fire BAR Photos.pdf

This document consists of technical standards, site maps, and photographs related to stockwater tank construction and dam embankments for the U.S. Forest Service Region 3.

The first section establishes minimum standards for dams impounding under 10 acre-feet of water. For new construction, Forest Service personnel must approve site location, fill material, foundation material, spillway size and location, and dam layout must be surveyed by qualified surveyors. For existing construction, maximum water depth against the dam is 10 feet when constructed with a crawler tractor; soil placement cannot exceed 6-inch lifts with crawler tractor compaction; spillways must pass through natural material; core trenches must be 3 feet deep or extend to bedrock; and borrow material should be sourced from within the reservoir basin below the high water mark when feasible. The second section provides a detailed schematic from U.S. Forest Service Region 3 showing stockwater embankment cross-sections and specifications, including maximum embankment height, crest length, base length, crest width, volume, reservoir capacity, drainage area, elevation, slope percentage, and soil texture characteristics. The remaining pages contain a topographic map indicating access routes through Whitehorse to Forest Road 9002W and Pine Flat Springs, with notation of a locked gate, Texas gate access point, potential staging area, and Highway 169/Whitehorse Junction reference point. Supplementary photographs show the existing terrain conditions at the proposed project site, depicting forested areas with natural drainage patterns and existing vegetation typical of the region.