Dam Report

Crystal Lake Dam dam

South Carolina, USA Red Bank Creek Hazard Significant
Today high
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Tonight low
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Dam height
25ft
Hazard rating
Significant
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Crystal Lake Dam -- None dam
Crystal Lake Dam None · Red Bank Creek
About this dam

Crystal Lake Dam

Crystal Lake Dam, located in Lexington, South Carolina, is a privately owned earth dam built in 1900 for recreational purposes, spanning 690 feet with a height of 25 feet. Situated on Red Bank Creek, the dam has a storage capacity of 342 acre-feet and a surface area of 57 acres. Although the dam is primarily used for recreation, it is also regulated by the South Carolina Department of Health and Environmental Control, with state permitting, inspection, and enforcement in place to ensure its safety and compliance.

The condition assessment of Crystal Lake Dam is rated as fair, with a significant hazard potential, prompting regular inspections every three years. The last inspection was conducted in December 2020, with emergency action plans in place to address any potential risks. Owned by a private entity, the dam holds historical significance as a key feature in the local landscape, offering recreational opportunities for visitors while maintaining a balance between human enjoyment and environmental stewardship.

Despite its age, Crystal Lake Dam continues to serve its purpose effectively, providing a serene setting for outdoor activities and water resource enthusiasts to enjoy. With its stone core and soil foundation, the dam stands as a testament to engineering ingenuity of the past, further highlighting the importance of ongoing maintenance and regulatory oversight to ensure its long-term sustainability and safety for generations to come.

StateNone
River / streamRed Bank Creek
NID IDSC00149
Owner typePrivate
Primary purposeRecreation
Dam typeEarth
Year built1900
Dam height25 ft
Dam length690 ft
Max storage342 AF
Normal storage228 AF
Surface area57.0 ac
Hazard potentialSignificant
ConditionFair
Last inspectionThu, 17 Dec 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 Crystal Lake Dam -- inflows here typically show up in storage 24-72 hours later.

Track Crystal Lake 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.

FAQ

About Crystal Lake Dam

Where does the data for Crystal Lake 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 Significant 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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