Dam Report

Ward Lake dam

California, USA Tr Susan River Hazard Low
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Tonight low
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Dam height
23ft
Hazard rating
Low
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Ward Lake -- None dam
Ward Lake None · Tr Susan River
About this dam

Ward Lake

Ward Lake, located in Susanville, California, is a privately owned reservoir with a primary purpose of water supply for irrigation and domestic use. Constructed in 1889, this earth dam stands at a height of 23 feet and has a storage capacity of 350 acre-feet. The reservoir covers an area of 60 acres and is fed by the Tr Susan River, serving as a crucial water source for the surrounding area.

Managed by the California Department of Water Resources (DWR) under the Safety of Dams program, Ward Lake is regularly inspected and maintained to ensure its structural integrity and safety. With a low hazard potential and a satisfactory condition assessment, the dam provides reliable water storage while mitigating potential risks. Despite its age, Ward Lake continues to play a vital role in water resource management in Lassen County.

As a key component of the local water supply infrastructure, Ward Lake contributes to the sustainability of agricultural activities and community water needs in the region. With its historical significance and ongoing regulatory oversight, this reservoir serves as an essential resource for water conservation and climate resilience efforts in the area.

StateNone
River / streamTr Susan River
NID IDCA00508
Owner typePrivate
Primary purposeWater Supply
Dam typeEarth
Year built1889
Dam height23 ft
Dam length800 ft
Max storage350 AF
Surface area60.0 ac
Drainage area2.0 sq mi
Hazard potentialLow
ConditionSatisfactory
Last inspectionThu, 17 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 Ward Lake -- inflows here typically show up in storage 24-72 hours later.

Track Ward Lake 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 Ward Lake

Where does the data for Ward Lake 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 Low 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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