Button Rock
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| State | Colorado |
| County | Boulder |
| Nearest City | LYONS |
| River/Stream | NORTH ST. VRAIN CREEK |
| Coordinates | 40.21706, -105.36705 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 214 ft |
| Dam Height | 210 ft |
| Dam Length | 925 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 20,400 acre-ft |
| Max Storage | 20,400 acre-ft |
| Normal Storage | 16,080 acre-ft |
| Surface Area | 222 acres |
| Drainage Area | 99 sq mi |
| Max Discharge | 29,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | CITY OF LONGMONT (HUSON, KEN) |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/12/2022 |
| Emergency Action Plan | Yes |