Dam Report

A. B. Evans Lake dam

Mississippi, USA Tr- Yazoo River Hazard Low
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Dam height
8ft
Hazard rating
Low
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A. B. Evans Lake -- None dam
A. B. Evans Lake None · Tr- Yazoo River
About this dam

A. B. Evans Lake

A. B. Evans Lake is a private water resource located in Humphreys, Mississippi, just 8 miles away from Belzoni. Managed by the USDA NRCS, this earth dam was completed in 1968 and serves multiple purposes, with a primary focus on agricultural and environmental needs. The lake has a capacity of 320 acre-feet and a low hazard potential rating, making it a vital resource for the local community.

With a spillway width of 1 foot and uncontrolled outlet gates, A. B. Evans Lake is designed to handle a maximum discharge of 2 cubic feet per second. The dam structure stands at 8 feet tall and spans over 10,000 feet in length, providing essential water storage for the surrounding area. While the condition assessment is currently marked as "Not Rated," the risk assessment categorizes the lake as having a moderate risk level, signaling the need for ongoing monitoring and management measures to ensure its safety and functionality in the face of climate challenges.

Despite not being under state jurisdiction or regulation, A. B. Evans Lake plays a crucial role in water resource management within the region. As part of the Vicksburg District and the broader network of natural resource conservation efforts, this lake stands as a testament to the collaborative efforts needed to safeguard water supplies in the face of changing climates. With its strategic location along the TR- Yazoo River and the endorsement of the Natural Resources Conservation Service, A. B. Evans Lake serves as a valuable asset for both agricultural and environmental sustainability in Mississippi.

StateNone
River / streamTr- Yazoo River
NID IDMS02102
Owner typePrivate
Primary purposeOther
Dam typeEarth
Year built1968
Dam height8 ft
Dam length10,240 ft
Max storage320 AF
Normal storage320 AF
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 A. B. Evans Lake -- inflows here typically show up in storage 24-72 hours later.

Track A. B. Evans 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 A. B. Evans Lake

Where does the data for A. B. Evans 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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