Allen Lake
Significant HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| State | Colorado |
| County | Boulder |
| Nearest City | LONGMONT |
| River/Stream | LEFT HAND CREEK-OS |
| Coordinates | 40.14047, -105.28410 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 1,525 ft |
| Year Completed | 1928 (98 years old) |
Storage & Hydraulics
| NID Storage | 865 acre-ft |
| Max Storage | 865 acre-ft |
| Normal Storage | 700 acre-ft |
| Surface Area | 36 acres |
| Max Discharge | 8,821 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | LEFT HAND DITCH COMPANY (TERRY PLUMMER) |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/23/2022 |
| Emergency Action Plan | Yes |