Dam Report

Bryson dam

North Carolina, USA Oconaluftee Hazard High
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Dam height
45ft
Hazard rating
High
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Bryson                                                            -- None dam
Bryson None · Oconaluftee
About this dam

Bryson

Bryson is a captivating hydroelectric dam located in Ela, North Carolina, on the Oconaluftee River. Built in 1925, this multi-arch dam stands at a height of 45 feet and has a hydraulic height of 33 feet, with a structural height of 35 feet. With a normal storage capacity of 235 acre-feet and a maximum discharge rate of 118,000 cubic feet per second, Bryson plays a crucial role in water resource management in the region.

Operated by the Federal Energy Regulatory Commission, Bryson's controlled spillway and two Tainter radial gates ensure efficient water discharge and flood control. Despite its high hazard potential and very high risk assessment rating, Bryson remains a vital piece of infrastructure for the local community. With no state regulation or enforcement, the dam's inspection frequency is set at once per year, with the last inspection conducted in September 2020.

For water resource and climate enthusiasts, Bryson represents both the challenges and opportunities associated with hydroelectric power generation. As a privately-owned dam with a rich history dating back almost a century, Bryson's role in shaping the local landscape and providing essential water storage and discharge services cannot be understated. With its unique design and operational features, Bryson stands as a testament to the innovative engineering solutions that have been developed to harness the power of rivers for sustainable energy production.

StateNone
River / streamOconaluftee
NID IDNC00790
Owner typePrivate
Primary purposeHydroelectric
Dam typeMulti-Arch
Year built1925
Dam height45 ft
Dam length341 ft
Max storage260 AF
Normal storage235 AF
Surface area43.0 ac
Drainage area188.0 sq mi
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 Bryson -- inflows here typically show up in storage 24-72 hours later.

Track Bryson 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 Bryson

Where does the data for Bryson 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.

More reservoirs

Other water bodies near here

Snoflo-tracked reservoirs and dams within driving distance of Bryson .

Premium feature

Favorites and alerts are part of Snoflo Premium. Save reservoirs, set storage thresholds, and get push notifications when conditions cross.

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Manage alerts in the Snoflo app

Custom alerts are configured in the iOS app -- favorite this dam, set a threshold, and you'll get a push the moment conditions cross.

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