D.f. Riley Grist Mill Dam
Significant HazardUnsatisfactory ConditionEmergency Action Plan: No
Location
| State | Massachusetts |
| County | Hampshire |
| Nearest City | Hatfield |
| River/Stream | Mill River |
| Coordinates | 42.37147, -72.60830 |
Physical Characteristics
| Dam Type | Stone |
| NID Height | 16 ft |
| Dam Length | 200 ft |
| Year Completed | 1881 (145 years old) |
Storage & Hydraulics
| NID Storage | 860 acre-ft |
| Max Storage | 860 acre-ft |
| Normal Storage | 580 acre-ft |
| Surface Area | 58 acres |
| Drainage Area | 47 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Mill River Storage, LLC;Old Mill Enterprises, LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 05/22/2019 |
| Emergency Action Plan | No |