Monongahela River Locks And Dam 3 dam
Monongahela River Locks And Dam 3
Located in Elizabeth, Pennsylvania, Monongahela River Locks and Dam 3, also known as Monongahela River Pool 03, is a federal structure managed by the US Army Corps of Engineers. Completed in 1907, this gravity dam plays a crucial role in navigation along the Monongahela River, with a hydraulic height of 16 feet and two locks that are 720 feet long and 56 feet wide each. The dam has a significant hazard potential and a moderate risk assessment rating, with measures in place to manage flood risks and ensure the structural integrity of the dam.
With a normal storage capacity of 16,300 acre-feet and a drainage area of 5,340 square miles, Monongahela River Locks and Dam 3 provides essential flood control and water management functions. The dam's spillway, with a width of 670 feet, is uncontrolled, allowing for the release of excess water to maintain water levels and protect the dam's integrity during severe weather events. The US Army Corps of Engineers continuously monitors and maintains the dam to address flood risks and collaborates with local emergency managers and the public to ensure readiness and preparedness in case of a dam-related emergency. More detailed information specific to this dam will be added in the future, highlighting the critical role it plays in water resource management and climate resilience efforts in the region.
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 Monongahela River Locks And Dam 3 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Monongahela River At Elizabeth | 21,100 cfs | → |
| Youghiogheny River At Sutersville | 1,340 cfs | → |
| Chartiers Creek At Carnegie | 143 cfs | → |
| Little Pine Creek Near Etna | 1 cfs | → |
| Redstone Creek At Waltersburg | 49 cfs | → |
| Youghiogheny River At Connellsville | 1,090 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Monongahela River Locks And Dam 3.
Boat launches
Campgrounds
Paddle runs
Track Monongahela River Locks And Dam 3 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 Monongahela River Locks And Dam 3
Where does the data for Monongahela River Locks And Dam 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 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 Monongahela River Locks And Dam 3.