Mackay Res Nr Mackay Id Reservoir Report

Last Updated: November 13, 2025

Get the latest Reservoir Report, Water Levels, and Weather Forecast for Mackay Res Nr Mackay Id in Mackay Reservoir in Idaho was created in 1946 by the construction of Mackay Dam on the Big Lost River. Updated daily.


°F

°F

mph

Wind

%

Humidity

The reservoir has a capacity of 36,200 acre-feet of water and is primarily used for irrigation of agricultural land. The hydrology of the area is influenced by snowpack, which provides water for both the reservoir and the surrounding agricultural land. The reservoir is also used for recreational purposes, including fishing, boating, and camping. The Big Lost River provides water to the reservoir and is a popular destination for fly fishing. The surrounding area is known for its scenic beauty and opportunities for outdoor recreation, including hiking, hunting, and wildlife viewing.

Gage Height, Ft 24hr Change 1.58%
Percent of Normal 86%
Minimum 6.8 ft
2025-09-16
Maximum 66.67 ft
2024-06-18
Average 29 ft
Dam_Height 75.2
Hydraulic_Height 67
Drainage_Area 788
Year_Completed 1918
Nid_Storage 45000
Hazard_Potential High
River_Or_Stream BIG LOST RIVER SINKS
Foundations Rock, Soil
Surface_Area 1392
Outlet_Gates Slide (sluice gate)
Dam_Length 1430
Nid_Height 75

Reservoir Stats

       
Seasonal Comparison
Reservoir Storage, Acre-Ft Levels
Gage Height, Ft Levels

Weather Forecast