Jim Naismith Reservoir dam
Jim Naismith Reservoir
Jim Naismith Reservoir, located in San Patricio, Texas, is a vital water supply resource designed by HDR and completed in 2000. This Earth-type dam stands at 21 feet high and spans 5300 feet, with a storage capacity of 758 acre-feet. The reservoir serves as a key water source for the region, with a normal storage capacity of 614 acre-feet and a surface area of 35 acres.
Managed by the local government and regulated by the Texas Commission on Environmental Quality (TCEQ), Jim Naismith Reservoir plays a crucial role in ensuring water availability and quality in the area. With a spillway width of 5 feet and a maximum discharge of 31 cubic feet per second, the reservoir is equipped to handle water management effectively. Although the hazard potential and condition assessment are not currently rated, the reservoir's risk assessment is moderate (3), signaling a need for ongoing monitoring and management to ensure its continued functionality and safety.
Despite being uncontrolled, the reservoir's outlet gates manage water flow efficiently, and with regular inspections every 5 years, the structure is maintained to meet regulatory guidelines. With its strategic location and importance for water supply, Jim Naismith Reservoir stands as a crucial asset for water resource and climate enthusiasts, highlighting the intersection of infrastructure, sustainability, and environmental management in water resource management.
Dam data reference
Condition Assessment
- Satisfactory
- No 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.
- 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.
- 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.
Hazard Potential Classification
- High
- Dams 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, environmental 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.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Jim Naismith Reservoir -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Oso Ck At Corpus Christi | 2 cfs | → |
| Rincon Bayou Channel Nr Calallen | 1 cfs | → |
| Nueces Rv At Calallen | · | → |
| Mission Rv At Refugio | 0 cfs | → |
| Copano Ck Nr Refugio | · | → |
| Petronila Ck At Fm 665 Nr Driscoll | 0 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Jim Naismith Reservoir.
Boat launches
- Parkview Place, Corpus Christi
- Ransom Road 430, Aransas Pass
- Redfish Bay Causeway, Aransas Pass
- J C Barr Boulevard Port Aransas
- Cove Harbor South 102, Rockport
- Joe Fulton Corridor Nueces County
Track Jim Naismith Reservoir in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About Jim Naismith Reservoir
Where does the data for Jim Naismith Reservoir come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the Not Available hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Jim Naismith Reservoir.