Dam Report

Salt Springs dam

California, USA North Fork Mokelumne River Hazard High
Today high
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Tonight low
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Dam height
328ft
Hazard rating
High
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Salt Springs                                                      -- None dam
Salt Springs None · North Fork Mokelumne River
About this dam

Salt Springs

Salt Springs is a privately owned hydroelectric dam located in Pioneer, California, along the North Fork Mokelumne River. Built in 1931, the dam stands at a height of 328 feet and has a storage capacity of 142,000 acre-feet. With a maximum discharge of 92,790 cubic feet per second, the dam is equipped with a controlled spillway and a series of outlet gates to manage water flow effectively.

Managed by the Federal Energy Regulatory Commission, Salt Springs has a high hazard potential and is regulated by the California Department of Water Resources for safety compliance. The dam's primary purpose is hydroelectric power generation, with a structural design of rockfill construction. Its location in Calaveras County, California, makes it a vital part of the region's water resource infrastructure, providing essential services while also posing risks that must be carefully managed and monitored.

Despite its age, Salt Springs has undergone regular inspections and maintenance, ensuring its structural integrity and operational efficiency. With a risk assessment rating of Very High, the dam remains a critical piece of California's water resource management infrastructure, serving both as a source of renewable energy and a potential area of concern for climate and water resource enthusiasts alike.

StateNone
River / streamNorth Fork Mokelumne River
NID IDCA00382
Owner typePrivate
Primary purposeHydroelectric
Dam typeRockfill
Year built1931
Dam height328 ft
Dam length1,945 ft
Max storage141,857 AF
Normal storage142,000 AF
Surface area963.0 ac
Drainage area169.0 sq mi
Hazard potentialHigh
ConditionNot Available
Last inspectionWed, 30 Sep 2020 00:00:00 GMT

Dam data reference

Condition Assessment

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.
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.
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.

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, environmental 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.
Detailed forecast

Plan around the weather

Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

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Deep dive

5-day forecast table

Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.

TimeConditionTemp (°F)Snow (in)Rain (in)Humidity (%)Wind (mps)Wind dir
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Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks.

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Regional inflow

Nearby streamflow gauges

USGS streamgauges around Salt Springs -- inflows here typically show up in storage 24-72 hours later.

Track Salt Springs in the Snoflo app

Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.

FAQ

About Salt Springs

Where does the data for Salt Springs come from?

Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.

How often is the report updated?

NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.

What does the High hazard rating mean?

The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.

What's "% of normal"?

The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).

Can I get alerts when storage crosses a threshold?

Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.

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Other water bodies near here

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Premium feature

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Manage alerts in the Snoflo app

Custom alerts are configured in the iOS app -- favorite this dam, set a threshold, and you'll get a push the moment conditions cross.

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