|
Incident ID |
MD00000-3432 |
|
Dam Name |
Claude Johnson Dam |
|
Downstream Hazard Potential |
L |
|
State |
MD |
|
Incident Date |
03/02/2020 |
|
Incident Type |
Non-failure |
|
Incident Driver |
Seepage/internal Erosion |
|
Incident Mechanism 1 |
Spillway Pipe Failure |
|
Incident Mechanism 2 |
Piping |
|
Incident Mechanism 3 |
Sinkhole |
|
Incident Description |
Owner contacted MDE, 25'x10x7' sinkhole upstream. Nearly breached |
|
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 $) |
Unknown |
|
Volume released at failure (ac-ft) |
|
|
Response |
Siphon installed and pool restricted until repairs |
|
Additional Remarks or Updates |
|
|
Incident Time |
|
|
Incident Duration |
3 months |
|
Incident Report Produced |
No |
|
Information Sources |
MD Dam Safety |
|
Owner Type |
|
|
Dam Type |
RE |
|
Primary Purpose(s) |
R |
|
EAP |
NR |
|
Year Completed |
1960 |
|
Year Modified |
0 |
|
Dam Height |
11 ft |
|
Max Storage (ac-ft) |
28 ac-ft |
|
Surface Area (acres) |
3 acres |
|
River Name |
St. Marys River |
|
Latitude |
38.2835 |
|
Longitude |
-76.5378 |
|
Regulatory Agency(ies) |
MD Dam Safety |
|
NID Number |
MD00000 |
|
Attachments |
|
