Mann Lake Dam dam
Mann Lake Dam
Mann Lake Dam, located in Falls County, Texas, was completed in 1957 and serves as a vital structure on the Brazos River. This privately owned earth dam stands at a height of 16 feet and has a length of 720 feet, providing a storage capacity of 108 acre-feet. With a spillway width of 86 feet and uncontrolled spillway type, the dam is designed to manage a maximum discharge of 1495 cubic feet per second.
Despite being privately owned, Mann Lake Dam is regulated and inspected by the state of Texas, with permitting and inspection processes in place to ensure its safety and compliance with regulations. The dam's hazard potential is deemed to be not available, with a moderate risk assessment rating of 3. Emergency action plans have been prepared, updated, and reviewed, indicating a proactive approach to risk management and public safety in the event of emergencies.
Water resource and climate enthusiasts will find Mann Lake Dam to be an interesting structure, with its unique design features and important role in managing water flow and storage on the Brazos River. The dam's historical significance, construction details, and risk management measures make it a fascinating subject for those interested in sustainable water resource management and infrastructure development in Texas.
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 Mann Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Brazos Rv At Waco | 324 cfs | → |
| Brazos Rv Nr Highbank | 716 cfs | → |
| Middle Bosque Rv Nr Mcgregor | 38 cfs | → |
| Hog Ck Nr Crawford | 8 cfs | → |
| Little Pond Ck Nr Burlington | · | → |
| Navasota Rv Abv Groesbeck | 4 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Mann Lake Dam.
Boat launches
- Sommerfeld Drive 1823, Waco
- Pep Club Road 299, Hallsburg
- Pavelka Drive Hallsburg
- North Martin Luther King Junior Boulevard 908-998, Waco
- North Martin Luther King Jr Boulevard Waco
- North Martin Luther King Junior Boulevard 3801, Waco
Campgrounds
Fishing spots
Track Mann 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 Mann Lake Dam
Where does the data for Mann 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 Not Available 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 Mann Lake Dam.