Montour Ash Basin No 1 dam
Montour Ash Basin No 1
Montour Ash Basin No 1, located in Derry Township, Pennsylvania, is a privately owned earth dam completed in 1971 with a height of 40 feet and a length of 8400 feet. The dam serves a primary purpose classified as "Other" and has a normal storage capacity of 465 acre-feet. With a hazard potential rated as "High" and a condition assessment deemed as "Satisfactory," the dam is under the regulatory jurisdiction of the Pennsylvania Department of Environmental Protection.
The Montour Ash Basin No 1 sits within the watershed of Chillisquaque Creek and is monitored for state permitting, inspection, and enforcement. In 2011, mechanical modifications were made to the dam, ensuring its continued stability and safety. The dam's maximum storage capacity is 5070 acre-feet, with a surface area of 117 acres and a drainage area of 0.2 square miles. Despite its high hazard potential, the dam's condition assessment indicates that it is currently in satisfactory condition, providing a crucial water resource management function in the region.
As an essential part of the water infrastructure in Montour County, Pennsylvania, Montour Ash Basin No 1 plays a vital role in regulating water flow and storage within the region. With its satisfactory condition assessment and regular inspection schedule, the dam ensures the safety of nearby communities and the environment. Monitoring agencies and regulatory bodies work together to uphold the dam's integrity and safeguard against potential risks, highlighting the importance of maintaining a robust water resource management system 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 Montour Ash Basin No 1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Chillisquaque Creek At Washingtonville | 11 cfs | → |
| Susquehanna River At Danville | 7,610 cfs | → |
| Chillisquaque Creek Near Potts Grove | 47 cfs | → |
| West Branch Susquehanna River At Allenwood | 6,830 cfs | → |
| Fishing Creek Near Bloomsburg | 222 cfs | → |
| Susquehanna River At Bloomsburg | 7,000 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Montour Ash Basin No 1.
Boat launches
Campgrounds
- Steel Steeds Motorcycle Campground
- Bald Eagle #4
- Bald Eagle #5
- Bald Eagle #8
- Ricketts Glen State Park
- Modern Cabins
Paddle runs
Track Montour Ash Basin No 1 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 Montour Ash Basin No 1
Where does the data for Montour Ash Basin No 1 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 Montour Ash Basin No 1.