Dam Report

Lema dam

California, USA Tr Churn Creek Hazard Low
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Dam height
31ft
Hazard rating
Low
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Lema -- None dam
Lema None · Tr Churn Creek
About this dam

Lema

Lema, a private water supply dam located in Redding, California, was completed in 1957 and stands at a height of 31 feet with a hydraulic height of 27 feet. The primary purpose of Lema Dam is to provide water for irrigation and other water supply needs in the area. It is regulated by the California Department of Water Resources and undergoes regular inspections to ensure its safety and functionality.

With a storage capacity of 108 acre-feet and a surface area of 14 acres, Lema Dam plays a crucial role in managing water resources in the region. Despite being classified as a low hazard potential structure, the dam is assessed to be in satisfactory condition as of September 2017. The last inspection conducted in July 2020 indicated that the dam continues to meet safety standards, further highlighting its importance in water management and infrastructure.

Managed by the Natural Resources Conservation Service, Lema Dam on Tr Churn Creek serves as a vital water resource infrastructure in Shasta County. Its strategic location and design enable it to efficiently store and supply water for agricultural and domestic use, contributing to the overall water security of the area. As climate change impacts water availability, structures like Lema Dam play a critical role in ensuring sustainable water management practices for the future.

StateNone
River / streamTr Churn Creek
NID IDCA00937
Owner typePrivate
Primary purposeWater Supply
Dam typeEarth
Year built1957
Dam height31 ft
Dam length516 ft
Max storage108 AF
Surface area14.0 ac
Drainage area0.2 sq mi
Hazard potentialLow
ConditionSatisfactory
Last inspectionThu, 23 Jul 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 Lema -- inflows here typically show up in storage 24-72 hours later.

Track Lema 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 Lema

Where does the data for Lema 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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