Dam Report

Neal Shoals dam

South Carolina, USA Broad River Hazard Low
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Dam height
25ft
Hazard rating
Low
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Neal Shoals                                                       -- None dam
Neal Shoals None · Broad River
About this dam

Neal Shoals

Neal Shoals is a concrete multi-arch dam located on the Broad River in Union, South Carolina. Completed in 1905, this hydroelectric structure stands at a height of 24.5 feet and has a structural height of 32 feet. With a capacity to store up to 1492 acre-feet of water and a maximum discharge rate of 4000 cubic feet per second, Neal Shoals plays a crucial role in regulating water flow and generating hydroelectric power in the region.

Operated by a public utility, Neal Shoals is primarily overseen by the Federal Energy Regulatory Commission (FERC). The dam features an uncontrolled spillway with a width of 987 feet and two slide (sluice gate) outlet gates. Despite its low hazard potential and moderate risk assessment, the dam's condition assessment is currently unavailable, highlighting the need for ongoing monitoring and maintenance to ensure its long-term safety and efficiency.

For water resource and climate enthusiasts, Neal Shoals offers a fascinating glimpse into the intersection of infrastructure, energy generation, and environmental stewardship. As a historic hydroelectric facility with a century-old legacy, this dam continues to serve as a vital resource for water management and renewable energy production in the picturesque landscapes of Union, South Carolina.

StateNone
River / streamBroad River
NID IDSC01058
Owner typePublic Utility
Primary purposeHydroelectric
Dam typeConcrete
Year built1905
Dam height25 ft
Dam length1,295 ft
Max storage1,492 AF
Normal storage1,350 AF
Surface area550.0 ac
Drainage area2,730.0 sq mi
Hazard potentialLow
ConditionNot Available
Last inspectionMon, 11 Mar 2019 00:00:00 GMT

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.
Detailed forecast

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.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

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Deep dive

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.

TimeConditionTemp (°F)Snow (in)Rain (in)Humidity (%)Wind (mps)Wind dir
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Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks.

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Regional inflow

Nearby streamflow gauges

USGS streamgauges around Neal Shoals -- inflows here typically show up in storage 24-72 hours later.

Track Neal Shoals 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.

FAQ

About Neal Shoals

Where does the data for Neal Shoals 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.