Overview
East Park Dam, which forms East Park Reservoir, is part of the Orland Project. East Park Dam is on Little Stony Creek in Glen County about 33 miles southwest of the town of Orland. Completed in 1910, the dam stores irrigation waters diverted and impounded from Little Stony Creek, Squaw Creek, and Little Indian Creek. East Park Reservoir is 2.7 miles long and encompasses 1,820 acres. The reservoir has a total capacity of 52,000 acre-feet. There are 25 miles of shoreline, 10 miles of which are available for public use. The dam is a curved, concrete thick-arch gravity structure. East Park Dam was placed on the National Register of Historic Places in the mid-1980s.
General
| Project | Orland |
| Longitude | -122.5150 |
| Latitude | 39.3567 |
| Watercourse | Little Stony Creek |
| Original Construction | 1908-1910 |
| National ID Number | CA10145 |
Dimensions
| Crest Elevation | 1198.68 ft |
| Top Parapet (Elevation) | 1201.68 ft |
| Structural Height | 139.00 ft |
| Hydraulic Height (Normal Operating Depth at Dam) | 90.00 ft |
| Crest Length | 266.00 ft |
| Crest Width | 10.00 ft |
| Volume of Dam Construction Materials | 12400.00 cu yd |
Hydraulics & Hydrology
| Total Water Storage at Elevation | 48211.0 acre-ft at 1198.18 |
| Spillway Capacity at Elevation | 9200.0 cfs at 1201.68 |
| Outlet Works Capacity at Elevation | 750.0 cfs at 1198.18 ft |
| Drainage Area | 102.0 sq mi |
| Hydrometeorological Report (HMR) | HMR 58 |
| Maximum Water Surface Elevation | 1208.56 ft |
| Auxiliary Spillway | No |
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