Dam Report

Cedar Creek Holding dam

Idaho, USA Cedar Creek Salmon Falls Creek Hazard Low
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Tonight low
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Dam height
24ft
Hazard rating
Low
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Cedar Creek Holding -- None dam
Cedar Creek Holding None · Cedar Creek Salmon Falls Creek
About this dam

Cedar Creek Holding

Cedar Creek Holding, also known as Cedar Mesa Reservoir, is a private water resource located in Twin Falls, Idaho. Managed by the USDA NRCS, this reservoir serves primarily for irrigation purposes with a storage capacity of 200 acre-feet and covering an area of 22 acres. Constructed in 1966, Cedar Creek Holding stands at a height of 23.7 feet with a spillway width of 95 feet, ensuring a maximum discharge of 162 cubic feet per second.

This Earth dam, built on rock and soil foundations, plays a crucial role in water management along Cedar Creek and Salmon Falls Creek. With state regulatory oversight by the Idaho Department of Water Resources, Cedar Creek Holding has been deemed to have low hazard potential and fair condition assessment as of its last inspection date in September 2020. Despite its moderate risk assessment level, the reservoir continues to provide essential irrigation water to the surrounding agricultural lands.

As a key player in the water infrastructure of the region, Cedar Creek Holding contributes to the sustainable utilization of water resources in Idaho. With its efficient design and operation, this reservoir exemplifies the importance of private ownership in water management and underscores the significance of state regulation and inspection in ensuring the safety and functionality of such vital structures in the face of changing climate conditions.

StateNone
River / stream Cedar Creek Salmon Falls Creek
NID IDID00187
Owner typePrivate
Primary purposeIrrigation
Year built1966
Dam height24 ft
Dam length2,000 ft
Normal storage200 AF
Surface area22.0 ac
Drainage area7.0 sq mi
Hazard potentialLow
ConditionFair
Last inspectionThu, 24 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 Cedar Creek Holding -- inflows here typically show up in storage 24-72 hours later.

Track Cedar Creek Holding 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 Cedar Creek Holding

Where does the data for Cedar Creek Holding 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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