Dam Report

Mirror Lake Dam dam

North Carolina, USA Cullasaja River Hazard High
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Tonight low
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Dam height
22ft
Hazard rating
High
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Mirror Lake Dam -- None dam
Mirror Lake Dam None · Cullasaja River
About this dam

Mirror Lake Dam

Mirror Lake Dam, located in Macon, North Carolina, is a concrete structure standing at a height of 22 feet along the Cullasaja River. Completed in 1958, this dam serves primarily for recreational purposes, offering a serene and picturesque setting for visitors in the city of Highlands. With a storage capacity of 230 acre-feet and a surface area of 27 acres, Mirror Lake Dam provides a tranquil oasis for outdoor enthusiasts seeking a peaceful retreat.

Despite its fair condition assessment as of February 2020, Mirror Lake Dam poses a high hazard potential due to its location and structural specifications. The dam is regulated by state authorities, including the North Carolina Dam Safety Program, ensuring that regular inspections and enforcement measures are in place to maintain its integrity and mitigate any potential risks. While the dam has not undergone significant modifications in recent years, its emergency action plan and risk assessment protocols are yet to be fully developed, highlighting the importance of ongoing monitoring and management to safeguard the surrounding community and environment.

With its scenic beauty and recreational significance, Mirror Lake Dam stands as a notable landmark in Macon County, attracting visitors and locals alike to its peaceful waters and lush surroundings. As climate change continues to impact water resources and infrastructure, the maintenance and management of dams like Mirror Lake Dam play a crucial role in preserving the natural landscape and ensuring the safety of those who enjoy its recreational offerings. By adhering to regulatory guidelines and implementing necessary risk management measures, Mirror Lake Dam can continue to provide a sustainable and enjoyable experience for water resource and climate enthusiasts for years to come.

StateNone
River / streamCullasaja River
NID IDNC00159
Owner typeLocal Government
Primary purposeRecreation
Dam typeConcrete
Year built1958
Dam length138 ft
Max storage230 AF
Normal storage230 AF
Surface area27.0 ac
Drainage area4,250.0 sq mi
Hazard potentialHigh
ConditionFair
Last inspectionWed, 26 Feb 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 Mirror Lake Dam -- inflows here typically show up in storage 24-72 hours later.

Track Mirror 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 Mirror Lake Dam

Where does the data for Mirror 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 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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