Dam Report

Dawson Dam dam

West Virginia, USA Callahan Branch Hazard High
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Tonight low
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Dam height
33ft
Hazard rating
High
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Dawson Dam -- None dam
Dawson Dam None · Callahan Branch
About this dam

Dawson Dam

Dawson Dam, located in Greenbrier, West Virginia, is a privately owned structure designed by TERRADON and completed in 2009. This rockfill dam stands at a height of 33 feet and stretches 516 feet in length, creating a reservoir with a storage capacity of 551 acre-feet. The primary purpose of Dawson Dam is for recreation, offering a surface area of 29.1 acres for water enthusiasts to enjoy. Despite its high hazard potential, the dam is currently deemed to be in satisfactory condition as of the last assessment in 2014.

The dam is situated on Callahan Branch and is regulated by the West Virginia Department of Environmental Protection. It is regularly inspected, with the most recent inspection conducted in February 2018. Dawson Dam has a drainage area of 235 square miles and a normal storage capacity of 398 acre-feet. While there are no associated structures or locks, the dam serves as a vital recreational resource for the surrounding community, providing opportunities for boating, fishing, and other water-based activities. As a significant part of the local landscape, Dawson Dam plays a crucial role in water resource management and climate resilience efforts in the region.

StateNone
River / streamCallahan Branch
NID IDWV02508
Owner typePrivate
Primary purposeRecreation
Dam typeRockfill
Year built2009
Dam height33 ft
Dam length516 ft
Max storage551 AF
Normal storage398 AF
Surface area29.1 ac
Drainage area235.0 sq mi
Hazard potentialHigh
ConditionSatisfactory
Last inspectionMon, 12 Feb 2018 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 Dawson Dam -- inflows here typically show up in storage 24-72 hours later.

Track Dawson 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 Dawson Dam

Where does the data for Dawson 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.

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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