Lanman Gss No 1 dam
Lanman Gss No 1
Lanman Gss No 1 is a privately owned earth dam located in Johnson County, Texas, designed by the USDA NRCS for fire protection, stock, and small fish pond purposes. Completed in 1981, the dam stands at a height of 21 feet with a length of 652 feet, providing a storage capacity of 68 acre-feet. Situated on the TR-S Fork Chambers Creek, the dam serves multiple functions including recreation and water resource management.
Despite its age, Lanman Gss No 1 has not been rated for its condition assessment and is listed as having a high risk potential. The dam features no spillway, locks, or significant drainage area, highlighting its vulnerability in times of high discharge. With no inspection frequency or emergency action plan in place, there is a need for increased monitoring and risk management measures to ensure the safety and integrity of the structure for both water resource and climate enthusiasts in the area.
As part of the Fort Worth District, Lanman Gss No 1 falls under state jurisdiction with permitting and inspection requirements in place. The dam's primary designer, the Natural Resources Conservation Service, remains responsible for its design and construction. With the potential for significant risk and the absence of critical safety measures, there is a pressing need for enhanced oversight and management to protect the surrounding community and water resources in the event of an emergency.
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 Lanman Gss No 1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Nolan Rv At Blum | 47 cfs | → |
| Mountain Ck Nr Venus | 4 cfs | → |
| Village Ck At Everman | 34 cfs | → |
| Walnut Ck Nr Mansfield | 19 cfs | → |
| Brazos Rv Ds Lk Granbury Nr Granbury | 359 cfs | → |
| Waxahachie Ck At Waxahachie | 15 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lanman Gss No 1.
Boat launches
- Country Club Road 2412, Cleburne
- Hagler Road 3034-3098, Cleburne
- U.S. 67 2374-2456, Cleburne
- Pr 21 North 2212, Cleburne
- Plowman Creek Park Road, Morgan
- Fort Graham, Whitney
Campgrounds
- Site: 001, Loop: Mustang Non Site Specific
- Site: Gs, Loop: Mustang Point
- Dallas / Arlington Koa
- Camp Thurman
Fishing spots
Track Lanman Gss No 1 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 Lanman Gss No 1
Where does the data for Lanman Gss No 1 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 Lanman Gss No 1.