Dam Report

Hemlock Lake Dam dam

North Carolina, USA Morgan Creek Hazard High
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Tonight low
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Dam height
25ft
Hazard rating
High
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Hemlock Lake Dam -- None dam
Hemlock Lake Dam None · Morgan Creek
About this dam

Hemlock Lake Dam

Hemlock Lake Dam, also known as Trout Lake Dam, is a private structure located in Sherwood Forest, North Carolina. Completed in 1937, this concrete buttress dam stands at a structural height of 25 feet and serves primarily for recreational purposes. Situated on Morgan Creek, the dam boasts a hydraulic height of 23 feet and a capacity to hold 40 acre-feet of water, with a normal storage of 37 acre-feet.

Despite its fair condition assessment as of March 2020, Hemlock Lake Dam is classified as having a high hazard potential. It is regulated by the North Carolina Department of Environmental Quality, Division of Energy, Mineral, and Land Resources, Dam Safety Program, ensuring that regular inspections and enforcement measures are in place. The dam's emergency action plan preparation and compliance with guidelines, as well as the availability of inundation maps for risk assessment, are factors that remain undisclosed in the available data.

In the picturesque setting of Transylvania County, Hemlock Lake Dam stands as a vital recreational asset, providing both enjoyment and the responsibility of risk management for the community. Its history and design showcase the intersection of water resource management and climate resilience, making it a focal point for enthusiasts seeking to understand the intricate balance between human activity and natural forces.

StateNone
River / streamMorgan Creek
NID IDNC00191
Owner typePrivate
Primary purposeRecreation
Dam typeConcrete
Year built1937
Dam length100 ft
Max storage40 AF
Normal storage37 AF
Surface area4.0 ac
Hazard potentialHigh
ConditionFair
Last inspectionFri, 27 Mar 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 Hemlock Lake Dam -- inflows here typically show up in storage 24-72 hours later.

Track Hemlock 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 Hemlock Lake Dam

Where does the data for Hemlock 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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