National dam
National
National is a private-owned dam located in St. Clair, Alabama, specifically in the city of Morning Star. Built in 1944, National serves as a water supply structure with a primary purpose of providing water storage. The dam is classified as a Rockfill type, with a hydraulic height of 7 feet and a structural height of 12 feet. It has a maximum storage capacity of 53 acre-feet and a normal storage of 30 acre-feet. The dam is situated on TR Trout Creek and is under the jurisdiction of the Mobile District of the US Army Corps of Engineers.
Despite its age, the condition of National is currently rated as "Not Rated" with a significant hazard potential. The dam has not been inspected in recent times, and there is no Emergency Action Plan (EAP) in place. The risk assessment and management measures for the dam are also unknown. With a history dating back to the mid-20th century, National provides a glimpse into the water resource infrastructure in Alabama and the challenges faced in maintaining and monitoring older dams for safety and functionality. For water resource and climate enthusiasts, the story of National is a reminder of the importance of proper maintenance and monitoring of critical water supply structures to ensure public safety and water security in the face of changing climate conditions.
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 National -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big Canoe Creek At Ashville Al | 115 cfs | → |
| Choccolocco Creek At Jackson Shoal Nr Lincoln Al | 407 cfs | → |
| Blackburn Fork Little Warrior R Nr Holly Springs | 25 cfs | → |
| Choccolocco Creek Near Boiling Spring | 143 cfs | → |
| Kelly Creek Near Vincent Al | 392 cfs | → |
| Talladega Creek At Alpine Al | 136 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near National.
Boat launches
- Woods Bend Road 3100, Ragland
- St. Clair County
- Ohatchee
- Riverview Drive St. Clair County
- Al 77 Lincoln
- Lakeshore Drive 128, Highland Lake
Campgrounds
- Anniston Army Depot Rv Military
- Noccalula Falls Campground
- Lake Chinnabee
- Cheaha State Park
- Turnipseed Hunter Camp
- Turnipseed Campground
Fishing spots
Track National 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 National
Where does the data for National 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 Significant 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.