Johnston Pond Dam dam
Johnston Pond Dam
Johnston Pond Dam, also known as Johnson-Morrison Dam, is a privately-owned structure located in Lancaster, South Carolina. Completed in 1958, this earth dam serves primarily for recreational purposes, offering a serene getaway for water resource and climate enthusiasts. Situated on the TR-Catawba River, the dam stands at a height of 21 feet and has a length of 280 feet, with a storage capacity of 71 acre-feet.
Despite being classified as having a low hazard potential, Johnston Pond Dam is regularly inspected by the South Carolina Department of Health and Environmental Control, with the last assessment conducted in August 2017. The dam is deemed to be in fair condition, with a moderate risk assessment rating. While the spillway type is uncontrolled, the dam's overall risk management measures are unspecified.
With its picturesque surroundings and strategic location within the Catawba River watershed, Johnston Pond Dam is a noteworthy structure for those interested in water resources and climate. Its historical significance and recreational value make it a key feature in the landscape of South Carolina, offering a glimpse into the intersection of human infrastructure and natural beauty in the region.
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 Johnston Pond Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Catawba River Below Catawba | 3,430 cfs | → |
| Waxhaw Creek At Sr1103 Near Jackson | 1 cfs | → |
| Catawba River Near Rockhill | 535 cfs | → |
| Mcalpine Cr Below Mcmullen Cr Nr Pineville | 7 cfs | → |
| Four Mile Creek Near Pineville | 3 cfs | → |
| Little Sugar Creek At Pineville | 38 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Johnston Pond Dam.
Boat launches
- Catawba Nation Greenway Trail York County
- Waterford Trail Rock Hill
- Piedmont Medical Center Trail York County
- New Gray Rock Road Tega Cay
- Windward Drive Tega Cay
- Boatshore Road York County
Campgrounds
- Andrew Jackson State Park
- Sign Language
- Cane Creek Park
- Ebenezer County Park
- Mcdowell Nature Preserve
- Williams Farm
Fishing spots
- Buck Branch
- Mountain Island Park Fishing Access
- Pittman Lake
- Arrowhead Lake
- Blewett Falls Lake Grassy Island
- Johns Creek Lake
Paddle runs
Track Johnston 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 Johnston Pond Dam
Where does the data for Johnston 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 Johnston Pond Dam.