Blalock Reservoir Dam dam
Blalock Reservoir Dam
Blalock Reservoir Dam, also known as Pates Creek Lake Dam, is a local government-owned structure located in Henry, Georgia. Constructed in 1988 for water supply purposes, this Earth-type dam stands at a height of 39 feet and has a maximum storage capacity of 6,160 acre-feet. The dam is situated on Pates Creek, within the jurisdiction of the Georgia Safe Dams Program, and is regulated, permitted, inspected, and enforced by the state authorities to ensure its safety and compliance.
Despite being classified as having a high hazard potential, Blalock Reservoir Dam is reported to be in satisfactory condition as of the last assessment in 2016. The dam features an uncontrolled spillway and outlet gates, with a moderate risk assessment rating. While the dam has not undergone any significant modifications over the years, it is subject to regular inspections every two years to monitor its integrity and address any potential risks. With its vital role in providing water supply to the area, the dam serves as a crucial infrastructure for managing water resources and climate-related challenges in the region.
As a key component of the water supply infrastructure in Henry, Georgia, Blalock Reservoir Dam plays a critical role in ensuring the availability of water resources for the local community. With its controlled operation and state-regulated oversight, the dam stands as a reliable structure for water storage and management. Despite its high hazard potential, the dam's satisfactory condition and risk management measures underscore its importance in addressing water resource and climate-related concerns in the area.
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 Blalock Reservoir Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Pates Creek At Buster Lewis Rd Near Flippen | 30 cfs | → |
| Flint River Near Lovejoy | 114 cfs | → |
| South River At Flakes Mill Road Nr Atlanta | 64 cfs | → |
| South River At Klondike Road | 164 cfs | → |
| Honey Creek At Ga 212 | 12 cfs | → |
| South River At Forest Park Road | 18 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Blalock Reservoir Dam.
Boat launches
- Lakeshore Drive Henry County
- Burch Lake Road Fayette County
- West Mcintosh Road Spalding County
- Peachtree Parkway 488, Shake Rag
- 1124 Peachtree City
- Pine Crest Drive 127, Peachtree City
Campgrounds
- Stone Mountain Park Campground
- Stone Mountain Campground
- Cochran Mill County Park
- High Falls State Park
- Newton Factory Shoals Rec Area
- Indian Springs State Park
Fishing spots
- Clayton County International Park
- Jester Creek
- Chapel Hill Park
- Griffin City Reservoir
- Padgett Lake
- Davidson Mountain Nature Preserve
Track Blalock Reservoir 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 Blalock Reservoir Dam
Where does the data for Blalock Reservoir 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 High 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 Blalock Reservoir Dam.