Zimmerhanzel Lake Dam dam
Zimmerhanzel Lake Dam
Zimmerhanzel Lake Dam, located in Hutto, Texas, is a private dam that serves primarily for recreational purposes. Completed in 1968, this earth dam stands at a height of 18.5 feet and stretches 600 feet in length, creating a storage capacity of 304 acre-feet. Overlooking the TR-Brushy Creek, the dam is regulated by the Texas Commission on Environmental Quality (TCEQ) and undergoes regular inspections to ensure its structural integrity.
The dam features an uncontrolled spillway with a width of 45 feet, allowing for a maximum discharge of 775 cubic feet per second. With a surface area of 25.5 acres, the dam's normal storage capacity is 187 acre-feet within a drainage area of 0.36 square miles. Despite its moderate risk assessment rating, the dam's condition is reported as satisfactory as of the latest assessment in April 2021. Notable modifications were made in 2000 and 2012 to enhance its hydraulic capabilities, ensuring the safety of surrounding communities in case of emergencies.
With its picturesque location and recreational offerings, Zimmerhanzel Lake Dam stands as a vital water resource in Williamson County, Texas. As a popular spot for outdoor enthusiasts and nature lovers, the dam plays a significant role in providing both leisure activities and critical water management functions for the local community.
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 Zimmerhanzel Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Brushy Ck At Kenney Fort Blvd At Round Rock | 42 cfs | → |
| Brushy Ck At Ih 35 | 39 cfs | → |
| Walnut Ck At Dessau Rd | 2 cfs | → |
| Brushy Ck At Cedar Park | 20 cfs | → |
| S Fk San Gabriel Rv At Georgetown | 36 cfs | → |
| Little Walnut Ck At Georgian Dr | 1 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Zimmerhanzel Lake Dam.
Boat launches
- Lake Pflugerville Park
- County Road 347 1520, Granger
- Lake Overlook Road 598, Georgetown
- Cedar Breaks Park Road, Georgetown
- Little Webberville Park
- Park Road 3, Georgetown
Campgrounds
- Berry Springs Park And Preserve
- Willis Creek - Granger Lake
- Taylor - Granger Lake
- Wilson Fox - Granger Lake
- Cedar Breaks - Lake Georgetown
- Camp Mabry Military
Fishing spots
Track Zimmerhanzel Lake 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 Zimmerhanzel Lake Dam
Where does the data for Zimmerhanzel Lake 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 Zimmerhanzel Lake Dam.