Dam Report

Saddle Dike No. 1 - Jocassee dam

South Carolina, USA Keowee Hazard High
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Dam height
35ft
Hazard rating
High
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Saddle Dike No. 1 - Jocassee                                      -- None dam
Saddle Dike No. 1 - Jocassee None · Keowee
About this dam

Saddle Dike No. 1 - Jocassee

Saddle Dike No. 1 in Jocassee, South Carolina, is a significant public utility structure associated with the Federal Energy Regulatory Commission. Completed in 1973, this earth dam stands at a height of 35 feet and spans 825 feet in length, serving primarily for hydroelectric purposes. Situated in Oconee County, the dam's reservoir boasts a storage capacity of 1,160,298 acre-feet, covering a surface area of 7,565 acres and harnessing the power of the Keowee River.

Despite its crucial role in providing hydroelectric power, Saddle Dike No. 1 poses a high hazard potential, prompting regular inspections by the Federal Energy Regulatory Commission. The dam's condition assessment is currently not available, but an Emergency Action Plan was last revised in December 2020 to ensure preparedness for any unforeseen events. Despite its risks, the dam continues to be a vital component of the region's water resource management, reflecting the delicate balance between harnessing nature's power and ensuring public safety.

Located in the scenic surroundings of Clemson, SC, Saddle Dike No. 1 stands as a testament to engineering ingenuity and the ongoing efforts to manage water resources in a sustainable and responsible manner. As water resource and climate enthusiasts, the complex interplay between infrastructure development and environmental stewardship at sites like Saddle Dike No. 1 serves as a compelling case study in the quest for a harmonious coexistence between human needs and natural ecosystems.

StateNone
River / streamKeowee
NID IDSC00529
Owner typePublic Utility
Primary purposeHydroelectric
Dam typeEarth
Year built1973
Dam height35 ft
Dam length825 ft
Max storage1,160,298 AF
Normal storage1,160,298 AF
Surface area7,565.0 ac
Hazard potentialHigh
ConditionNot Available
Last inspectionWed, 30 Sep 2020 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 Saddle Dike No. 1 - Jocassee -- inflows here typically show up in storage 24-72 hours later.

Track Saddle Dike No. 1 - Jocassee 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 Saddle Dike No. 1 - Jocassee

Where does the data for Saddle Dike No. 1 - Jocassee 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.

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