Hearn Dam dam
Hearn Dam
Hearn Dam, located in Tyler, Texas, along Magnus Branch, is a privately owned earth dam primarily used for recreational purposes. Standing at a height of 17 feet and stretching 550 feet in length, the dam has a storage capacity of 68 acre-feet, with a normal storage level of 28 acre-feet. The dam features an outlet system with one controlled gate and two uncontrolled gates, with a spillway width of 99 feet.
Although the dam has not been rated for condition assessment, it has undergone regular state inspections and is permitted for operation. The Fort Worth District of the US Army Corps of Engineers has jurisdiction over the dam, with no federal agency ownership or funding associated with it. While the dam's hazard potential and risk assessment are not available, an Emergency Action Plan (EAP) was last revised in 2010, ensuring preparedness in case of emergencies.
Water resource and climate enthusiasts interested in the management and maintenance of dams like Hearn Dam can appreciate the data provided, giving insight into the structure's design, purpose, and safety protocols. The dam's role in providing recreational opportunities while also contributing to water storage and management in the area highlights the importance of sustainable practices and monitoring for such vital infrastructure.
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 Hearn Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Neches Rv Nr Town Bluff | 4,390 cfs | → |
| Neches Rv Nr Rockland | 1,370 cfs | → |
| Village Ck Nr Kountze | 1,210 cfs | → |
| Menard Ck Nr Rye | 59 cfs | → |
| Long King Ck At Livingston | 19 cfs | → |
| Trinity Rv Nr Goodrich | 5,310 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Hearn Dam.
Boat launches
Campgrounds
- Lake Tejas City Park
- Indian Village Campground
- Alabama - Coushatta Lake Tombigbee
- Campers Cove - Town Bluff Reservoir
- B.A. Steinhagen Lake Campground
- Magnolia Ridge - Town Bluff Reservoir
Fishing spots
Paddle runs
- Preserve Boundary In The Big Sandy Unit To Confluence With Big Sandy Creek
- Preserve Boundary Of The Big Sandy Unit To Confluence With Village Creek
- Town Bluff Dam To Hwy 96 Bridge
- Confluence With Big Sandy Creek To Confluence With The Neches River
- Us Highway 69 To Ba Steinhagen Reservoir
- Preserve Boundary In The Big Sandy Unit To Confluence With Trinity River
Track Hearn 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 Hearn Dam
Where does the data for Hearn 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 Hearn Dam.