Montour Ash Basin No 1
Montour Ash Basin No 1 is an earth dam located in Montour County, Pennsylvania, built in 1971. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Montour Ash Basin No 1
Montour Ash Basin No 1 is a dam in Montour, Pennsylvania. The dam is owned by Montour, Llc (private). It impounds the Wtrshd Chillisquaque Creek.
The dam stands 40 feet tall and stretches 8,400 feet across, creates a reservoir covering 117 acres, has a maximum storage capacity of 5,070 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1971, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. Notably, no emergency action plan is currently on file for this high-hazard dam. The most recent inspection on record was 10/13/2020.
At 40 feet, this dam is taller than 87% of dams nationwide.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Pennsylvania dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Pennsylvania |
| County | Montour |
| River/Stream | Wtrshd Chillisquaque Creek |
| Coordinates | 41.07750, -76.66667 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 8,400 ft |
| Year Completed | 1971 (55 years old) |
Storage & Hydraulics
| NID Storage | 5,070 acre-ft |
| Max Storage | 5,070 acre-ft |
| Normal Storage | 465 acre-ft |
| Surface Area | 117 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | MONTOUR, LLC |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/13/2020 |
| Emergency Action Plan | No |
Identifiers
| NID ID | PA01240 |
| Federal ID | PA01240 |
| More Info | State Dam Safety Program |