Dam Report

Steffen Brothers Reservoir Dam dam

Washington, USA Little Stemilt Creek Hazard High
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Tonight low
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Dam height
15ft
Hazard rating
High
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Steffen Brothers Reservoir Dam -- None dam
Steffen Brothers Reservoir Dam None · Little Stemilt Creek
About this dam

Steffen Brothers Reservoir Dam

Located in Malaga, Washington, the Steffen Brothers Reservoir Dam stands as a testament to engineering and ingenuity. Completed in 1947, this private-owned structure serves multiple purposes, including irrigation and recreation, making it a vital resource for the local community. With a dam height of 15 feet and a storage capacity of 34 acre-feet, it not only provides water for irrigation but also creates a picturesque surface area of 4.2 acres for recreational activities.

Managed by the Washington Department of Ecology, the Steffen Brothers Reservoir Dam is subject to regular inspections, with a fair condition assessment and a high hazard potential. Despite its age, the dam continues to play a crucial role in water resource management in the area, showcasing the importance of proper maintenance and oversight. With its location along Little Stemilt Creek and proximity to the Seattle District, this dam is a key component of the water infrastructure in Chelan County.

Congressional District 08, represented by Kim Schrier (D), benefits from the presence of the Steffen Brothers Reservoir Dam, which not only provides water for irrigation but also offers a recreational oasis for locals and visitors alike. As climate change continues to impact water resources, structures like this dam become increasingly vital in managing and conserving water for both agricultural and recreational purposes. The ongoing maintenance and regulatory oversight ensure the safety and sustainability of this essential water resource in Washington state.

StateNone
River / streamLittle Stemilt Creek
NID IDWA01018
Owner typePrivate
Primary purposeRecreation
Dam typeEarth
Year built1947
Dam length500 ft
Max storage34 AF
Normal storage20 AF
Surface area4.2 ac
Drainage area0.0 sq mi
Hazard potentialHigh
ConditionFair
Last inspectionWed, 09 Jun 2021 12:00:00 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 Steffen Brothers Reservoir Dam -- inflows here typically show up in storage 24-72 hours later.

Track Steffen Brothers Reservoir Dam 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 Steffen Brothers Reservoir Dam

Where does the data for Steffen Brothers Reservoir Dam 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.