|
Incident ID |
TX02957-3598 |
|
Dam Name |
HEATH BRANCH FISHING CLUB LAKE DAM |
|
Downstream Hazard Potential |
S |
|
State |
TX |
|
Incident Date |
05/16/2024 |
|
Incident Type |
Non-failure |
|
Incident Driver |
Hydrologic/flooding |
|
Incident Mechanism 1 |
Spillway Erosion/head Cutting |
|
Incident Mechanism 2 |
|
|
Incident Mechanism 3 |
|
|
Incident Description |
Increased flows in spillway and gate rehab project led to undermining of the spillway stilling basin |
|
Named Hydrologic Event |
multiple storms |
|
EAP Enacted (Y/N) due to Incident |
Yes |
|
Fatalities (Number) |
|
|
Number of People Evacuated |
0 |
|
Number of Habitable Structures Evacuated |
0 |
|
Number of Habitable Structures Flooded |
0 |
|
Other Infrastructure Impacts |
None |
|
Economic Damages (in $) |
Unknown |
|
Volume released at failure (ac-ft) |
|
|
Response |
Emergency repairs consisted of placing rip rap and concrete in the eroded areas |
|
Additional Remarks or Updates |
January flooding eroded rip rap between the stilling basin and tailwater weir; April/May flooding exacerbated the situation. May 16 a section of the East wing wall was observed to be displaced; rip rap was placed to stabilize the wall until the waters receded to get a better understanding of the situation. In June, once gates were able to be closed; a diver noted up to 6-ft of undermining along the stilling basin endsill, 200-ft of the tailwater weir was gone; and a large scour hole between the endsill and tailwater weir was observed. Emergency repairs included placing concrete along the damaged areas; CFD analysis was performed to determine best options for gate operations going forward (especially if gates are out of commission); final permanent repairs are in design phase |
|
Incident Time |
|
|
Incident Duration |
|
|
Incident Report Produced |
Yes |
|
Information Sources |
TCEQ |
|
Owner Type |
P |
|
Dam Type |
RE |
|
Primary Purpose(s) |
R |
|
EAP |
NR |
|
Year Completed |
1940 |
|
Year Modified |
0 |
|
Dam Height |
21 ft |
|
Max Storage (ac-ft) |
400 ac-ft |
|
Surface Area (acres) |
0 acres |
|
River Name |
MCDONALD CREEK |
|
Latitude |
30.6646 |
|
Longitude |
-95.563 |
|
Regulatory Agency(ies) |
TCEQ |
|
NID Number |
TX02957 |
|
Attachments |
|
