Dam Report

Holmes Lake Dam dam

Mississippi, USA Unt Of Tallahala Creek Hazard Low
Today high
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Tonight low
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Dam height
18ft
Hazard rating
Low
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Holmes Lake Dam -- None dam
Holmes Lake Dam None · Unt Of Tallahala Creek
About this dam

Holmes Lake Dam

Holmes Lake Dam is a privately owned structure located in Hinds, Mississippi, serving primarily for recreation purposes. Built in 1960 by the USDA NRCS, this earth-type dam stands at a height of 18 feet and spans a length of 550 feet, with a storage capacity of 165 acre-feet. The dam is situated along the Tallahala Creek, under the jurisdiction and regulation of the Mississippi Department of Environmental Quality.

Despite being categorized with a low hazard potential and fair condition assessment, Holmes Lake Dam poses a moderate risk, as indicated by a risk assessment rating of 3. The dam features an uncontrolled spillway and outlet gates, with no associated locks for water control. While the last inspection in June 2017 revealed a satisfactory condition, there is limited information available on emergency preparedness measures such as an Emergency Action Plan (EAP) or updated contact information.

Water resource and climate enthusiasts interested in the management and maintenance of dams like Holmes Lake Dam may find its design and operational details intriguing. With the potential for recreational activities and its location along Tallahala Creek, the dam serves as a key infrastructure for water storage and management in the region, highlighting the importance of regular inspections and risk assessments to ensure public safety and environmental protection.

StateNone
River / streamUnt Of Tallahala Creek
NID IDMS01794
Owner typePrivate
Primary purposeRecreation
Dam typeEarth
Year built1960
Dam height18 ft
Dam length550 ft
Max storage165 AF
Normal storage130 AF
Surface area15.0 ac
Drainage area0.1 sq mi
Hazard potentialLow
ConditionFair
Last inspectionThu, 22 Jun 2017 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 Holmes Lake Dam -- inflows here typically show up in storage 24-72 hours later.

Track Holmes Lake 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 Holmes Lake Dam

Where does the data for Holmes Lake 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 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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