Dam Report

T C Null dam

Alabama, USA Cotahaga Creek Hazard Low
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Tonight low
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Dam height
18ft
Hazard rating
Low
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T C Null -- None dam
T C Null None · Cotahaga Creek
About this dam

T C Null

T C Null, also known as Null Lake, is a private fish and wildlife pond located in Sumter, Alabama. Built in 1972 by the USDA NRCS, this Earth type dam stands at 18 feet tall and spans 600 feet in length, providing a surface area of 62 acres and a drainage area of 0.03 square miles. With a maximum storage capacity of 93 acre-feet, this low hazard potential structure serves as a recreational spot for water resource and climate enthusiasts to enjoy.

Despite being unregulated by the state, T C Null boasts a spillway width of 50 feet and a maximum discharge rate of 850 cubic feet per second. Its moderate risk assessment rating indicates the need for careful monitoring, although the condition assessment remains unrated. With a primary purpose of supporting fish and wildlife, this picturesque pond offers a serene environment for outdoor activities while serving as a vital water resource in the region. For those interested in sustainable water management and conservation efforts, T C Null is a must-visit destination in Oakchia, Alabama.

StateNone
River / streamCotahaga Creek
NID IDAL01480
Owner typePrivate
Primary purposeFish And Wildlife Pond
Dam typeEarth
Year built1972
Dam height18 ft
Dam length600 ft
Max storage93 AF
Normal storage64 AF
Surface area62.0 ac
Drainage area0.0 sq mi
Hazard potentialLow
ConditionNot Rated

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 T C Null -- inflows here typically show up in storage 24-72 hours later.

Track T C Null 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 T C Null

Where does the data for T C Null 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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