Dam 21 dam
Dam 21
Dam 21, also known as 42f, is a federal-owned structure located in Killeen, Texas, along the Coryell River. The primary purpose of this earth dam is debris control, with a height of 22 feet and a length of 1110 feet. It has a storage capacity of 272 acre-feet and a maximum discharge rate of 1542 cubic feet per second. The dam is owned, funded, designed, constructed, regulated, inspected, and operated by the US Army, highlighting its importance in national defense and infrastructure management.
Despite being classified as having a low hazard potential, Dam 21 is subject to moderate risk, with a risk assessment rating of 3. Regular inspections are conducted, with the most recent one taking place in September 2020. The dam does not fall under state regulation or permitting, further emphasizing its federal ownership and management. While the condition assessment is listed as "Not Available," the structure's overall risk management measures and emergency action plan status are not disclosed in the data.
For water resource and climate enthusiasts, Dam 21 serves as a crucial piece of infrastructure for debris control along the Coryell River in Texas. Its federal ownership and management by the US Army highlight its significance in national defense and emergency response efforts. With a moderate risk rating and regular inspections, the dam plays a vital role in ensuring the safety and stability of the surrounding area. Further details on its condition assessment, risk management measures, and emergency action plan status would provide a more comprehensive understanding of the dam's role in water resource management and climate resilience.
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 Dam 21 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Cowhouse Ck At Pidcoke | 33 cfs | → |
| Lampasas Rv Nr Kempner | 64 cfs | → |
| Lampasas Rv At Ding Dong | 133 cfs | → |
| Leon Rv At Gatesville | 146 cfs | → |
| S Fk Rocky Ck Nr Briggs | 7 cfs | → |
| Nolan Ck At S Penelope | 64 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Dam 21.
Track Dam 21 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 Dam 21
Where does the data for Dam 21 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 Dam 21.