Upper Long Lake
High HazardUnsatisfactory ConditionEmergency Action Plan: Yes
Location
| State | Colorado |
| County | Jefferson |
| Nearest City | ARVADA |
| River/Stream | RALSTON CREEK-OS |
| Coordinates | 39.82285, -105.23565 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 46 ft |
| Dam Height | 46 ft |
| Dam Length | 1,500 ft |
| Year Completed | 1939 (87 years old) |
Storage & Hydraulics
| NID Storage | 1,770 acre-ft |
| Max Storage | 1,770 acre-ft |
| Normal Storage | 1,500 acre-ft |
| Surface Area | 60 acres |
| Max Discharge | 8 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | DENVER BOARD OF WATER COMMISSIONERS |
| Owner Type | Public Utility |
| Hazard Classification | High |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 06/08/2022 |
| Emergency Action Plan | Yes |