TOLNA DAM NO. 1 - ND00027-2609
Dam Name: TOLNA DAM NO. 1
State: ND
Downstream Hazard Potential: S
Incident Type: Non-Failure
Incident Date: 03/13/2015
Incident Driver: Deterioration or Poor Condition
Incident Mechanism 1: Spillway Chute Failure
Incident Mechanism 2
Incident Mechanism 3
Incident IDND00027-2609
Incident DescriptionCaused by water flowing under the spillway and causing erosion under the spillway
Named Hydrologic Event
EAP Enacted (Y/N) due to Incident
Fatalities (Number)0
Number of People Evacuated0
Number of Habitable Structures Evacuated0
Number of Habitable Structures Flooded0
Other Infrastructure Impacts
Economic Damages (in $)
Response
Volume released at failure (ac-ft)
Additional Remarks or UpdatesThis is an old dam built in the 1930s and it has a history of problems with seepage under the spillway. No evacuations were necessary, but ND Highway 15, immediately downstream of the dam, was closed overnight as a precaution. The dam did not fail completely, and is currently being repaired.
Owner TypeL
Dam TypeRE
Primary Purpose(s)R
EAPY
Dam Height36 ft
Max Storage (ac-ft)3080.00
Surface Area (acres)166.00
Year Completed1936
NID NumberND00027
River NameTOLNA COULEE
Latitude47.8045
Longitude-98.3943
Year Modified
1941
Regulatory Agency(ies)NDSWC
Incident Time
Incident Duration
Incident Report Produced
Information Sources
