MENNO DAM - SD00026-3408


Incident ID SD00026-3408
Dam Name MENNO DAM
Downstream Hazard Potential H
State SD
Incident Date 04/01/2019
Incident Type Non-failure
Incident Driver Hydrologic/flooding
Incident Mechanism 1 Spillway Erosion/head Cutting
Incident Mechanism 2 Animal Activity
Incident Mechanism 3
Incident Description Secondary spillway experienced significant heading cutting when it operated during both April and August of 2019. Erosion related to livestock grazing on the spillway likely contributed to the development of the issue.
Named Hydrologic Event
EAP Enacted (Y/N) due to Incident No
Fatalities (Number) 0
Number of People Evacuated 0
Number of Habitable Structures Evacuated 0
Number of Habitable Structures Flooded 0
Other Infrastructure Impacts
Economic Damages (in $)
Volume released at failure (ac-ft)
Response Owner increased monitoring of the dam and secondary spillway until it was repaired in Fall of 2019.
Additional Remarks or Updates
Incident Time
Incident Duration
Incident Report Produced
Information Sources SD Dam Safety
Owner Type S
Dam Type RE
Primary Purpose(s) R
EAP Y
Year Completed 1935
Year Modified 1996
Dam Height 53 ft
Max Storage (ac-ft) 2050 ac-ft
Surface Area (acres) 48 acres
River Name JAMES RIVER TRIBUTARY
Latitude 43.2617
Longitude -97.6167
Regulatory Agency(ies) DENR
NID Number SD00026
Attachments