Flag Lake Dam dam
Flag Lake Dam
Flag Lake Dam, located in Bossier, Louisiana, is a vital structure managed by the US Air Force primarily for flood risk reduction along the Fifi Bayou. Completed in 1940, this earth dam stands at a height of 11 feet with a hydraulic height of 5 feet and a structural height of 8 feet. With a normal storage capacity of 3000 acre-feet and a maximum discharge of 3060 cubic feet per second, the dam plays a crucial role in managing water flow in the area.
The dam also serves other purposes such as providing a habitat for fish and wildlife, as well as offering recreational opportunities to the community. With a surface area of 660 acres and a drainage area of 33.5 square miles, Flag Lake Dam is an essential part of the local ecosystem. Although categorized as having a low hazard potential, the dam is regularly inspected by the US Air Force to ensure its structural integrity and safety. Despite its age, Flag Lake Dam continues to fulfill its important role in water resource management and environmental conservation in the region.
In the event of emergencies, the dam operators have designated emergency contacts and protocols in place, although specific details on emergency action plans and risk management measures are not readily available. The risk assessment for Flag Lake Dam indicates a very high risk level, emphasizing the importance of ongoing monitoring and maintenance to prevent any potential hazards. As a key infrastructure for flood control and water resource management, Flag Lake Dam remains a critical asset for the community and a focal point for water resource and climate enthusiasts.
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.
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.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
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.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Flag Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Red Chute Bayou At Sligo | 266 cfs | → |
| Cypress Bayou Near Keithville | 124 cfs | → |
| Bayou Dorcheat Near Springhill | 15 cfs | → |
| Saline Bayou Near Lucky | 266 cfs | → |
| Big Cypress Ck Abv Sh 43 Nr Karnack | 178 cfs | → |
| Sabine Rv Nr Carthage | 7,250 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Flag Lake Dam.
Track Flag 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.
About Flag Lake Dam
Where does the data for Flag 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.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Flag Lake Dam.