Overview
Fresno Dam, located on the Milk River 14 miles west of Havre, Montana, is a compacted earthfill dam with a structural height of 110 feet and a crest length of 2,070 feet. It contains 2,105,000 cubic yards of material. An overflow-type spillway at the north end of the dam provides for a flow of 51,360 cubic feet per second through the concrete-lined channel. The outlet works discharge a maximum of 2,180 cubic feet per second through two 72-inch steel pipe outlet tubes. A conservation storage of 127,200 acre-feet is impounded in Fresno Reservoir. Provision also is made for flood control benefits.
Fresno Dam is located in a valley, which the Milk River has cut in sandstone and shales of the Judith River formation (Upper Cretaceous). The strata of the Judith River formation dip gently east-word and are frequently of the lenticular nature. Foundation is river silts and gravel in riverbed, irregularly cemented, leaky Fresno sandstone in right abutment; sandstone underlain by impervious and fairly stable Sprague shale in left abutment.
General
| Project | Milk River |
| Dam Type | Homogeneous earthfill |
| Location | Fourteen miles west of Havre, Montana |
| Longitude | -109.9456 |
| Latitude | 48.6019 |
| Watercourse | Milk River |
| Reservoir | Fresno |
| Original Construction | 1937-1939 |
| Base Width | 726.00 ft |
Dimensions
| Crest Elevation | 2,596.10 ft |
| Structural Height | 110.00 ft |
| Hydraulic Height (Normal Operating Depth at Dam) | 57.00 ft |
| Crest Width | 22.00 ft |
| Top of Active Conservation Pool (Elevation) | 2,567.00 ft |
| Volume of Dam Construction Materials | 2,105,000.00 cu yd |
| Spillway Crest Elevation | 2,575.00 ft |
| Crest Length | 2,070.00 ft |
| Top of Joint Use Pool (Elevation) | 2,575.00 ft |
| Top of Dead Storage Pool (Elevation) | 2,530.00 ft |
Hydraulics & Hydrology
| Spillway Capacity at Elevation | 51,360.00 cfs at 2,591.00 ft |
| Total Water Storage at Elevation | 129,062.00 acre-ft at 2,575.00 ft |
| Spillway Type | Uncontrolled Crest |
| Auxiliary Spillway | No |
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