North Mopac Dam dam
North Mopac Dam
North Mopac Dam, located in Travis County, Texas, was completed in 1960 and is owned by the local government. This earth dam, with a height of 7 feet and a length of 1500 feet, serves a primarily "Other" purpose and has a storage capacity of 98 acre-feet. The dam is regulated by the Texas Commission on Environmental Quality (TCEQ) and undergoes regular inspections to ensure its structural integrity and safety.
The dam features an uncontrolled spillway with a width of 204 feet and is equipped with two uncontrolled outlet gates. With a fair condition assessment as of April 2021, the dam poses a moderate risk (level 3) and has a hazard potential that is not available. The inspection frequency is set at 5 years, with the last inspection conducted in April 2013. Overall, North Mopac Dam plays a crucial role in managing water resources in the area and mitigating flood risks, showcasing the importance of proper infrastructure for climate resilience and water management in the region.
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 North Mopac Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Shoal Ck At Silverway Dr | · | → |
| Little Walnut Ck At Georgian Dr | 1 cfs | → |
| Bull Ck At Loop 360 Nr Austin | 5 cfs | → |
| Waller Ck At Koenig Lane | 0 cfs | → |
| Walnut Ck At Dessau Rd | 5 cfs | → |
| Ft Br Boggy Ck At Manor Rd | 21 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near North Mopac Dam.
Boat launches
- North Capital Of Texas Highway 5015, Austin
- Greenshores Drive 6921, Travis County
- Redbud Trail, Austin
- Ann And Roy Butler Hike And Bike Trail, Austin
- Bullick Hollow Road 13601, Austin
- Festival Beach Road, Austin
Campgrounds
- Camp Mabry Military
- Emma Long Metropolitan Park
- Cypress Creek - Lake Travis
- Sandy Creek - Lake Travis
- Arkansas Bend - Lake Travis
- Mckinney Falls State Park
Fishing spots
Track North Mopac Dam 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 North Mopac Dam
Where does the data for North Mopac Dam 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 North Mopac Dam.