Laurel Run Reservoir dam
Laurel Run Reservoir
Laurel Run Reservoir, located in the City of St. Marys, Pennsylvania, serves as a vital water supply source for the local community. This Earth-type dam, completed in 1970, stands at a height of 84 feet and boasts a storage capacity of 3,682 acre-feet. Despite its significant role in providing water for the region, the reservoir's condition assessment is marked as poor, with a high hazard potential.
The Pennsylvania Department of Environmental Protection regulates and inspects Laurel Run Reservoir, ensuring its compliance with state laws and safety standards. The reservoir covers a surface area of 92 acres and is situated on the Laurel Run river, with a drainage area of 8.8 square miles. With a maximum storage capacity of 3,682 acre-feet and a normal storage level of 2,679 acre-feet, the reservoir plays a crucial role in meeting the water supply needs of the surrounding population.
While Laurel Run Reservoir continues to provide essential water resources for the City of St. Marys, its poor condition and high hazard potential highlight the importance of ongoing maintenance and risk management measures. As a key component of the local water supply infrastructure, the reservoir's upkeep and regulatory oversight are crucial to ensuring a sustainable and reliable water source for the community 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 Laurel Run Reservoir -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Clarion River At Johnsonburg | 842 cfs | → |
| Clarion River At Ridgway | 2,880 cfs | → |
| Eb Clarion River At Eb Clarion River Dam | 244 cfs | → |
| West Branch Clarion River At Wilcox | 225 cfs | → |
| Sevenmile Run Near Rasselas | 18 cfs | → |
| East Branch Clarion River Near Clermont | 0 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Laurel Run Reservoir.
Boat launches
- Instanter Boat Launch
- Little Toby Creek
- Irwin Run Canoe Launch
- Treasure Lake Road 15351, Sandy Township
- Treasure Lake Road 16311, Sandy Township
- Kyle Lake
Campgrounds
- East Branch Lake
- Red Mill
- Boy Scount Camp
- Parker Dam State Park
- Twin Lakes Rec Area
- Kelly Pines Campground
Paddle runs
Track Laurel Run Reservoir 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 Laurel Run Reservoir
Where does the data for Laurel Run Reservoir 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 High 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 Laurel Run Reservoir.