Operating Basin No 1 Levee Reservoir Report
Last Updated: December 18, 2025
Operating Basin No 1 Levee, located in Calhoun, Texas, was completed in 1957 and stands as a crucial structure for water resource management in the area.
°F
°F
mph
Wind
%
Humidity
Summary
This private-owned levee, with a dam height of 13 feet and a length of 14,400 feet, serves a primary purpose of "Other" and is classified as an Earth dam with a Buttress core. It has a storage capacity of 3,155 acre-feet and covers a surface area of 480 acres, providing essential flood control and water storage functions for the region.
Managed by the Texas Commission on Environmental Quality (TCEQ), the Operating Basin No 1 Levee is subject to state regulations, inspections, and enforcement to ensure its structural integrity and operational effectiveness. While the dam is currently rated as "Not Rated" in terms of condition assessment, it has a high risk potential assigned to it, indicating the importance of regular monitoring and maintenance to mitigate potential hazards. With no spillway and limited outlet gates, the levee plays a vital role in protecting the surrounding area from flooding and managing water levels in the Off Ch-Goff Bayou.
Although the dam has not been modified in recent years and lacks an official Emergency Action Plan (EAP), its strategic location and design make it a critical asset for water resource management in the region. With a risk assessment of "High (2)" and limited information on risk management measures, stakeholders and enthusiasts in water resources and climate will find the Operating Basin No 1 Levee an intriguing structure worth monitoring and studying for its role in safeguarding the local community and environment.
Year Completed |
1957 |
Dam Length |
14400 |
Dam Height |
13 |
River Or Stream |
OFF CH-GOFF BAYOU |
Primary Dam Type |
Earth |
Surface Area |
480 |
Hydraulic Height |
13 |
Nid Storage |
3155 |
Structural Height |
13 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
13 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
North End Of Gbra Calhoun Canal Nr Long Mott
|
31cfs |
Guadalupe Rv At Sh 35 Nr Tivoli
|
472cfs |
Guadalupe Rv Nr Tivoli
|
550cfs |
San Antonio Rv Nr Mcfaddin
|
235cfs |
Guadalupe Rv Nr Bloomington
|
262cfs |
Placedo Ck Nr Placedo
|
44cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Operating Basin No 1 Levee