Blocker Lake Dam dam
Blocker Lake Dam
Blocker Lake Dam, located in Harrison, Texas, was completed in 1962 and serves as a crucial water supply structure in the region. This private-owned dam, standing at a height of 25 feet with a length of 600 feet, primarily functions to store and regulate water from the TR-Harrison Bayou. Its design, classified as an Earth dam with a Buttress core type, showcases the engineering ingenuity of the time.
Despite its age, Blocker Lake Dam maintains a high risk assessment level, indicating the potential for hazards. The absence of a spillway and limited inspection data raises concerns about its structural integrity and safety standards. While the dam has a normal storage capacity of 120 acre-feet, it is crucial for stakeholders and regulators to conduct regular assessments and implement risk management measures to ensure the dam's reliability and resilience in the face of changing climates and water resource demands.
As enthusiasts of water resources and climate, it is vital to recognize the significance of Blocker Lake Dam in the local ecosystem and community. Understanding its purpose, design, and risk factors can inform discussions and actions towards sustainable water management practices and infrastructure improvements. By monitoring and addressing the challenges faced by Blocker Lake Dam, we can contribute to the preservation of water resources and the protection of surrounding environments for generations to come.
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 Blocker Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big Cypress Ck Abv Sh 43 Nr Karnack | 167 cfs | → |
| Little Cypress Ck Nr Jefferson | 75 cfs | → |
| Black Cypress Bayou At Jefferson | 33 cfs | → |
| Sabine Rv Nr Beckville | 348 cfs | → |
| Big Cypress Ck Nr Jefferson | 16 cfs | → |
| Sabine Rv Nr Carthage | 7,250 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Blocker Lake Dam.
Boat launches
- East Dallas Street 100, Jefferson
- Boat Launch Road Harrison County
- Marion County
- Big Cypress Marina Road 1500, Jefferson
Campgrounds
- Caddo Lake State Park
- Earl Williamson Park
- Buckhorn Creek - Lake Of The Pines
- Buckhorn Creek Campground
- Brushy Creek - Lake Of The Pines
- Hurricane Creek - Lake Of The Pines
Fishing spots
Track Blocker 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 Blocker Lake Dam
Where does the data for Blocker 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 Blocker Lake Dam.