Dam Report

Hewitt Lake Dam dam

North Carolina, USA Denson Creek-Os Hazard Low
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Tonight low
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Dam height
25ft
Hazard rating
Low
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Hewitt Lake Dam -- None dam
Hewitt Lake Dam None · Denson Creek-Os
About this dam

Hewitt Lake Dam

Hewitt Lake Dam, located in Montgomery, North Carolina, serves as a vital recreational resource for the local community. Built in 1969, this earth dam stands at 25 feet in structural height and has a hydraulic height of 15 feet. With a storage capacity of 50 acre-feet, the dam provides essential water storage for the surrounding area, ensuring a steady water supply for recreational activities and wildlife habitat maintenance.

Despite being privately owned, Hewitt Lake Dam undergoes regular state inspections to maintain its fair condition and low hazard potential. The dam's primary purpose is for recreation, offering opportunities for fishing, boating, and other water-based activities. Situated on Denson Creek-Os, the dam not only provides a scenic backdrop for outdoor enthusiasts but also plays a crucial role in managing water resources in the region.

With a maximum discharge capacity of 185 cubic feet per second, Hewitt Lake Dam is equipped to handle potential flooding events while enhancing the overall resilience of the local water infrastructure. As climate change continues to impact water resources, dams like Hewitt Lake play a crucial role in mitigating risks and ensuring sustainable water management practices for future generations.

StateNone
River / streamDenson Creek-Os
NID IDNC00476
Owner typePrivate
Primary purposeRecreation
Dam typeEarth
Year built1969
Dam length255 ft
Max storage50 AF
Normal storage42 AF
Surface area5.0 ac
Hazard potentialLow
ConditionFair
Last inspectionWed, 07 Nov 2012 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 Hewitt Lake Dam -- inflows here typically show up in storage 24-72 hours later.

Track Hewitt 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 Hewitt Lake Dam

Where does the data for Hewitt 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 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.

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