Donald R. Wheeler (surprise Lake) Dam
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| State | New Jersey |
| County | Morris |
| Nearest City | Montville |
| River/Stream | East Branch Rockaway River |
| Coordinates | 40.95315, -74.35688 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 750 ft |
| Year Completed | 1909 (117 years old) |
Storage & Hydraulics
| NID Storage | 190 acre-ft |
| Max Storage | 190 acre-ft |
| Normal Storage | 143 acre-ft |
| Surface Area | 25 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 155 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Pequannock Properties, LLC |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/19/2024 |
| Emergency Action Plan | Yes |