Harrison Pond Dam dam
Harrison Pond Dam
Harrison Pond Dam, located in Johnson, Georgia, is an earth dam with a height of 11 feet and a hydraulic height of 9 feet. The dam, constructed with a buttress core type, spans 360 feet in length and has a storage capacity of 112 acre-feet. The dam's purpose and primary dam type are not listed, but its low hazard potential and moderate risk assessment indicate a relatively stable structure with minimal risk of failure.
Despite being unlisted by state agencies for ownership and regulation, Harrison Pond Dam is subject to state inspection and enforcement. The dam, with a surface area of 15 acres and draining a watershed of 390 acres, features an uncontrolled spillway and outlet gates. The last inspection in 2014 rated the dam's condition as "Not Rated," suggesting a need for updated assessments to ensure its continued safety and functionality.
Water resource and climate enthusiasts may be interested in Harrison Pond Dam for its unique design and moderate risk profile. The dam's location in Georgia, its low hazard potential, and the lack of recent condition assessments present an opportunity for further exploration and study. As a vital component of the local water infrastructure, understanding the dam's structural integrity and risk management measures is crucial for ensuring the safety of surrounding communities and the preservation of water resources 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 Harrison Pond Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Ogeechee River At Midville | 344 cfs | → |
| Williamson Swamp Creek At Davisboro | 31 cfs | → |
| Oconee River Near Oconee | 591 cfs | → |
| Oconee River At Dublin | 737 cfs | → |
| Buffalo Creek At Ga 272 | 23 cfs | → |
| Oconee River At Avant Mine | 372 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Harrison Pond Dam.
Fishing spots
Track Harrison Pond 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 Harrison Pond Dam
Where does the data for Harrison Pond 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 Low 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 Harrison Pond Dam.