Madison Dam Quick Facts
Madison Dam Map
Madison Dam Information
Madison Dam is a timber crib dam located about 34 miles from Three Forks, Mt, Madison, Montana.
The dam, which is on the Madison River, was primarily built for Hydroelectric purposes, but also serves for Recreation, Water Supply and Flood Risk Reduction benefits.
The dam was designed by and commissioned in 1907 and is currently owned by NorthWestern Energy.
Madison Dam Structure
The Madison Dam is approximately 257 feet (78 m) long, 39 feet (12 m) high and has a structural volume of cubic yards (0 cubic metres).
Madison Dam Storage Capacity & Surface Area
The reservoir has a normal storage capacity of 41,917 acre-ft (51,704 Ml) and maximum capacity of 42,053 acre-ft (51,872 Ml).
The surface area of the reservoir is 3,900 acres (1,578 ha) and the total catchment area is 2,181 square miles (5,649 square kilometres).
Madison Dam Spillway
The dam has a 140 feet (43 m) wide controlled spillway with a maximum discharge capacity of 7700 cubic feet per second (218 cubic metres per second).
Madison Dam Compared to Five Famous American Dams
Madison Dam Weather
Current Conditions at Madison Dam
| Parameter | Value |
|---|---|
| Current Time | 01:46 |
| Sunrise | 07:29 |
| Sunset | 19:00 |
| Temperature (°F) | 44 |
| Feels Like (°F) | 40 |
| Cloud Coverage (%) | 87 |
| Pressure (inHg) | 1017 |
| Humidity (%) | 31 |
| Wind Speed (mph) | 9 |
| Rain (mm) | 0 |
7-Day Forecast for Madison Dam
| Day | Min Temp (°F) | Max Temp (°F) | Feels Like (°F) | Pressure (inHg) | Humidity (%) | Wind Speed (mph) | Wind Gust (mph) | Wind Dir | Precip Prob (%) | Precip Volume (mm) | Weather |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Today | 44 | 78 | 75 | 1006 | 13 | 29 | 53 | SSW | 0 | - |  |
| Sat | 38 | 65 | 55 | 1018 | 16 | 15 | 31 | SSW | 0 | - | |
| Sun | 45 | 73 | 68 | 1017 | 12 | 12 | 17 | SSW | 0 | - | |
| Mon | 47 | 71 | 65 | 1017 | 18 | 11 | 19 | WSW | 0 | - | |
| Tue | 50 | 74 | 67 | 1013 | 18 | 12 | 15 | SW | 0 | - | |
| Wed | 51 | 77 | 72 | 1012 | 17 | 12 | 17 | W | 0 | - | |
| Thu | 53 | 76 | 72 | 1012 | 20 | 15 | 19 | SW | 33 | 0 |  |
| Fri | 55 | 72 | 66 | 1015 | 28 | 8 | 14 | NE | 0 | - |  |
Madison Dam Frequently Asked Questions
Madison Dam is in Montana.
Madison Dam is in Madison County.
Madison Dam is 39 feet high.
Madison Dam is 257 feet long.
More Dams in Madison County:
Badger Creek Watershed Site M-1-A DamDunlap Lake Dam
Eaton Brook Reservoir Dam
Erieville Reservoir Dam
Holiday Shores Lake Dam
Kentucky River Dam No 10
Kentucky River Lock & Dam 11
Lake Choctaw Dam
Lake Moraine Dam
Lake Pushmataha Dam
Madison Dam
Nims Lake Dam
Ruby Dam
Silver Lake Dam
South River W/S Str. #29 Dam
Taylor Fork Lake Dam
Willow Creek Dam
More Dams in Montana:
Ackley Lake DamAshley Dam
Bair Dam
Beaver Creek Reservoir Dam
Box Elder Creek Dam
Broadwater Dam
Bullhook Dam
Bynum Reservoir Dam
Canyon Ferry Dam
Chinook, North Dam
Clark Canyon Dam
Cochrane Dam
Como Dam
Cooney Dam
Deadmans Basin Dam
Deadmans Basin Dike
Delmoe Lake Dam
Dry Fork Dam
East Fork Dam
Eureka Reservoir Dam
Eureka Reservoir West Dike
Frenchman Dam
Fresno Dam
Georgetown Dam
Gibson Dam
Hauser Dam
Hebgen Dam
Helena Valley Dam
Holter Dam
Homestead Dam
Hungry Horse Dam
Katy's Lake Dam
Kicking Horse Dam
Lake Frances East Dam
Lake Frances North Dam
Lake Sherburne Dam
Lima Dam
Lower Glasston Dam
Lower Willow Creek Dam
Madison Dam
Martinsdale, East Dam
Martinsdale, North Dam
Mccarter North Dam
Mccarter West Dam
Medicine Lake Dam No. 10
Medicine Lake Dam No. 11
Medicine Lake Dam No. 4
Morony Dam
Mystic Lake Dam
Nelson Dike Da
Condition Assessment Classification
Satisfactory
No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor
A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
High
Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner’s property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Source: National Inventory of Dams