Folsom Dam Quick Facts
Folsom Dam Map
Folsom Dam Information
Folsom Dam is a concrete gravity dam located in Sacramento County, California.
The dam, which is on the American River, was primarily built for Hydroelectric purposes, but also serves for Irrigation and Recreation benefits.
The dam was designed by and commissioned in 1956 and is currently owned by US Bureau of Reclamation.
Folsom Dam Structure
The Folsom Dam is approximately 1,400 feet (427 m) long, 275 feet (84 m) high and has a structural volume of 1,170,000 cubic yards (894,529 cubic metres).
Folsom Dam Storage Capacity & Surface Area
The reservoir has a normal storage capacity of 894,000 acre-ft (1,102,731 Ml) and maximum capacity of 1,002,000 acre-ft (1,235,947 Ml).
The surface area of the reservoir is 11,180 acres (4,524 ha) and the total catchment area is 1,870 square miles (4,843 square kilometres).
Folsom Dam Spillway
According to the latest available data, the Folsom Dam does not have any spillways.
Folsom Dam Compared to Five Famous American Dams
Folsom Dam Weather
Current Conditions at Folsom Dam
| Parameter | Value |
|---|---|
| Current Time | 22:25 |
| Sunrise | 07:14 |
| Sunset | 18:25 |
| Temperature (°F) | 67 |
| Feels Like (°F) | 67 |
| Cloud Coverage (%) | 2 |
| Pressure (inHg) | 1014 |
| Humidity (%) | 67 |
| Wind Speed (mph) | 3 |
| Rain (mm) | 0 |
7-Day Forecast for Folsom 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 | 61 | 83 | 78 | 1016 | 41 | 6 | 11 | SE | 0 | - |  |
| Wed | 62 | 77 | 69 | 1015 | 57 | 7 | 13 | SE | 62 | 0 |  |
| Thu | 56 | 72 | 66 | 1011 | 45 | 11 | 24 | NNW | 0 | - | |
| Fri | 47 | 77 | 66 | 1018 | 13 | 15 | 26 | WNW | 0 | - | |
| Sat | 53 | 78 | 64 | 1019 | 13 | 7 | 14 | SW | 0 | - | |
| Sun | 57 | 78 | 69 | 1020 | 13 | 5 | 8 | ESE | 0 | - |  |
| Mon | 59 | 79 | 70 | 1016 | 24 | 4 | 7 | W | 0 | - |  |
| Tue | 61 | 83 | 72 | 1016 | 22 | 5 | 5 | WNW | 0 | - | |
Folsom Dam Frequently Asked Questions
Folsom Dam is in California.
Folsom Dam is in Sacramento County.
Folsom Dam is 275 feet high.
Folsom Dam is 1,400 feet long.
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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