Gray's Landing Lock And Dam dam
Gray's Landing Lock And Dam
Gray's Landing Lock and Dam, located in Greene, Pennsylvania, along the Monongahela River, serves as a crucial structure for navigation purposes in the region. Constructed in 1995 by the US Army Corps of Engineers, this gravity dam stands at a height of 33 feet with a length of 680 feet, providing storage of up to 12,500 acre-feet of water. Equipped with a single lock measuring 720 feet in length, the dam also features an uncontrolled spillway with a width of 576 feet to manage maximum discharges of 80,000 cubic feet per second.
With a significant hazard potential, Gray's Landing Lock and Dam undergoes regular inspections and risk assessments to ensure its structural integrity and the safety of surrounding communities. The US Army Corps of Engineers follows a comprehensive risk management plan, involving continuous monitoring, maintenance, and collaboration with local emergency managers to address flood risks associated with the dam. By updating emergency action plans and engaging with the public, the Corps aims to enhance preparedness and response capabilities in the event of a dam-related emergency, emphasizing the importance of proactive measures and awareness in safeguarding the dam and its surroundings from potential risks.
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 Gray's Landing Lock And Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Monongahela River Near Masontown | 2,120 cfs | → |
| Dunkard Creek At Shannopin | 74 cfs | → |
| South Fork Tenmile Creek At Jefferson | 24 cfs | → |
| Deckers Creek At Morgantown | 27 cfs | → |
| Redstone Creek At Waltersburg | 49 cfs | → |
| Big Sandy Creek At Rockville | 107 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Gray's Landing Lock And Dam.
Boat launches
Campgrounds
- Mason - Dixon Historical Park
- Chestnut Ridge Regional Park
- Coopers Rock State Forest
- Tall Oaks Campground
- Kentuck - Ohiopyle State Park
- Kentuck Campground
Fishing spots
- Bruceton Mills Public Fishing Area
- Deep Creek Lake
- Snowy Creek
- Broadford Lake
- Little Youghiogheny River Reservoir
- Savage River Reservoir
Paddle runs
- Begins Below The Youghiogheny River Lake Dam In Confluence, Pennsylvania To Ends In South Connellsville, Pennsylvania
- Begins As River Passes Under The Herrington Manor Road Bridge At Oakland, Maryland To The Corporate Boundary Of Friendsville, Maryland
- Route 33/8 To Jobs Run Near Porterwood
- North Fork To Hickory Lick Run
- State Park Bridge To North Fork
- Otter Creek To Blackwater
Track Gray's Landing Lock And 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 Gray's Landing Lock And Dam
Where does the data for Gray's Landing Lock And 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 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 Gray's Landing Lock And Dam.