Mackinnon Gss dam
Mackinnon Gss
Mackinnon Gss is a privately owned earth dam located in Ellis County, Texas, designed by the USDA NRCS in 1977 for fire protection, stock, and small fish pond purposes. With a height of 19 feet and a length of 789 feet, the dam has a storage capacity of 117 acre-feet and serves the TR-MILL CREEK river/stream. Despite being regulated by the state with permitting and inspection requirements in place, the dam does not have a spillway and is classified as having a high risk potential.
This dam, situated in the Fort Worth District, is crucial for fire protection and recreational activities in the area. Although it lacks certain structural features, such as a spillway, the Mackinnon Gss dam plays a significant role in storing water for various purposes. As a private entity, the dam is not owned or funded by federal agencies but is subject to state regulations and inspections to ensure its safety and efficiency.
For water resource and climate enthusiasts, the Mackinnon Gss dam represents a unique engineering feat in Texas, blending functionality with environmental considerations. With its earth structure type and buttress core design, this dam stands as a testament to the importance of sustainable water management practices and the need for ongoing risk assessments and maintenance to ensure its continued effectiveness in serving the 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 Mackinnon Gss -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Richland Ck At Hwy 22 Nr Mertens | 309 cfs | → |
| Chambers Ck At Fm 55 Nr Avalon | 7 cfs | → |
| White Rk Ck At Fm 308 Nr Irene | 498 cfs | → |
| Ash Ck At Hwy 171 Nr Malone | 434 cfs | → |
| Waxahachie Ck Nr Bardwell | 1 cfs | → |
| Richland Ck Nr Dawson | 0 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Mackinnon Gss.
Boat launches
- Northwest 3360 Road, Frost
- Navarro County
- Ellis County
- High View Marina Road, Ennis
- Lakeshore Drive Waxahachie
- Old Park Road Ellis County
Campgrounds
- Pecan Point - Navarro Mills Reservoir
- Wolf Creek - Navarro Mills Reservoir
- Mott - Bardwell Lake
- Liberty Hill - Navarro Mills Reservoir
- Oak Park - Navarro Mills Reservoir
- Highview - Bardwell Lake
Fishing spots
Track Mackinnon Gss 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 Mackinnon Gss
Where does the data for Mackinnon Gss 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 Mackinnon Gss.