TWO BUTTES - CO00759-2094
Dam Name: TWO BUTTES
State: CO
Downstream Hazard Potential: H
Incident Type: Non-Failure
Incident Date: 08/08/2013
Incident Driver: Hydrologic/Flooding
Incident Mechanism 1: Insufficient Spillway Capacity
Incident Mechanism 2
Incident Mechanism 3
Incident IDCO00759-2094
Incident DescriptionDue to heavy rainfall reservoir went from dry 55 feet above the outlet between 8-1 & 8-8. There was concern that the spillway could flow and potentially the dam could overtop due to a spillway not meeting the Rules.
Named Hydrologic Event
EAP Enacted (Y/N) due to IncidentYes
Fatalities (Number)
Number of People Evacuated
Number of Habitable Structures Evacuated
Number of Habitable Structures Flooded
Other Infrastructure Impacts
Economic Damages (in $)
Response
Volume released at failure (ac-ft)
Additional Remarks or UpdatesSince the design event has a low probability of occurrence, allowances were made to the owner to temporarily store over the restricted storage level. Activated EAP at a Level 1, unusual condition level; Communication with Emergency Managers, and increased surveillance of the dam on a daily basis is required and being performed by the owner's staff.
Owner TypeS
Dam TypeRE
Primary Purpose(s)RF
EAPY
Dam Height106 ft
Max Storage (ac-ft)40654.00
Surface Area (acres)1182.00
Year Completed1908
NID NumberCO00759
River NameTWO BUTTE CREEK
Latitude37.6359
Longitude-102.538
Year Modified
Regulatory Agency(ies)DWR
Incident Time
Incident Duration
Incident Report Produced
Information Sources
