20_-_Crystal_Springs_Dam__Figure_4.pdf

This is a site plan map/technical drawing showing the Crystal Springs Dam at Ash Meadows National Wildlife Refuge. The drawing depicts key infrastructure components including an inflow structure, siphon outlet works, erosion gullies, service spillway, emergency spillway, and the Upper Springs Diversion Ditch. The reservoir is labeled as Crystal Springs Reservoir with thick vegetation noted in approach channels.

The dam specifications listed in the notes indicate a length of 5000 feet, crest width of 22.5' to 25', upstream slope of ~4.0H:1V, and downstream slope of ~2.5H:1V. The drawing shows water flow patterns to the Lower Crystal Marsh and includes station markers along various points of the dam structure. A scale bar indicates measurements up to 1500 feet. The document appears to be Figure 4 from a larger set of technical drawings, dated August 2005, related to restoration work at the refuge.