Impoundment No. 3 dam
Impoundment No. 3
Impoundment No. 3 is a private water resource located in Jefferson County, Alabama, near the city of Graysville. With a dam height of 25 feet and a maximum discharge capacity of 320 cubic feet per second, this impoundment plays a significant role in water management in the region. While the primary purpose and specific design features of the dam are not specified in the data, its hazard potential is deemed significant, highlighting the importance of proper maintenance and oversight.
Despite being privately owned and not regulated by the state, Impoundment No. 3 is a crucial component of the local water infrastructure. Its condition is currently not rated, indicating a need for further assessment and potentially the development of an Emergency Action Plan (EAP) to address any potential risks associated with the dam. The lack of state jurisdiction and permitting raises questions about the level of oversight and regulation for this impoundment, especially in the face of changing climate patterns and increasing water resource challenges.
As water resource and climate enthusiasts, understanding the intricacies of impoundments like No. 3 allows for a more comprehensive view of how human activities intersect with natural systems. The data provided offers a glimpse into the complexities of managing water resources, highlighting the need for sustainable practices and robust regulatory frameworks to ensure the safety and longevity of such structures. Further research and monitoring will be crucial to fully grasp the implications of Impoundment No. 3 on the local ecosystem and community, underscoring the interconnectedness of water management and climate resilience.
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 Impoundment No. 3 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Locust Fork At Sayre | 244 cfs | → |
| Fivemile Creek Near Republic | 41 cfs | → |
| Village Creek Near Docena | 43 cfs | → |
| Village Creek Near Pratt City | 51 cfs | → |
| Village Creek At Avenue W At Ensley | 38 cfs | → |
| Village Creek At 24th St. At Birmingham | 229 cfs | → |
About Impoundment No. 3
Where does the data for Impoundment No. 3 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 below 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.
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.