Dam Report

Roanoke Creek Dam # 49a dam

Virginia, USA Little Horsepen Creek - Vahu6 Ru85 Horsepen Creek Hazard Significant
Today high
--
Tonight low
--
Dam height
34ft
Hazard rating
Significant
Loading current conditions…
Loading next 24 hours…
Loading 7-day outlook…
Roanoke Creek Dam # 49a -- None dam
Roanoke Creek Dam # 49a None · Little Horsepen Creek - Vahu6 Ru85 Horsepen Creek
About this dam

Roanoke Creek Dam # 49a

Roanoke Creek Dam # 49a, also known as Royster Lake, is a crucial structure located in Keysville, Virginia, that plays a significant role in flood risk reduction for the surrounding area. Completed in 1962, this earth dam stands at a height of 34.2 feet and has a storage capacity of 2,130 acre-feet, with a normal storage of 131 acre-feet. The dam spans a length of 502 feet and covers a surface area of 30.5 acres, serving as a key defense against potential flooding events.

Managed by the Department of Conservation and Recreation in Virginia, Roanoke Creek Dam # 49a is deemed to have a significant hazard potential, with a fair condition assessment as of July 2020. Regular inspections are conducted to ensure its structural integrity, with the last assessment taking place in July 2020. Although no spillway type or width information is provided, the dam's primary purpose of flood risk reduction underscores its importance in safeguarding the community and the environment from potential water-related disasters. As an essential component of the local government's flood management strategy, this dam stands as a crucial asset in the region's water resource and climate resilience efforts.

In the event of an emergency, it is essential for stakeholders to have preparedness measures in place, including an Emergency Action Plan (EAP) to guide responses and mitigate risks effectively. While the EAP status for Roanoke Creek Dam # 49a is unspecified, ongoing efforts to meet guidelines and ensure adherence to safety protocols are crucial for maintaining the dam's functionality and protecting the surrounding community. Overall, Roanoke Creek Dam # 49a stands as a vital infrastructure piece in Virginia's water resource management and climate resilience framework, highlighting the importance of proactive monitoring and maintenance to uphold its flood risk reduction capabilities.

StateNone
River / streamLittle Horsepen Creek - Vahu6 Ru85 Horsepen Creek
NID IDVA037007
Owner typeLocal Government
Primary purposeFlood Risk Reduction
Dam typeEarth
Year built1962
Dam height34 ft
Dam length502 ft
Max storage2,130 AF
Normal storage131 AF
Surface area30.5 ac
Drainage area5.7 sq mi
Hazard potentialSignificant
ConditionFair
Last inspectionTue, 21 Jul 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.

Loading hourly forecast…
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
Loading detailed forecast…
Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks.

Loading 15-day outlook…
Regional inflow

Nearby streamflow gauges

USGS streamgauges around Roanoke Creek Dam # 49a -- inflows here typically show up in storage 24-72 hours later.

Track Roanoke Creek Dam # 49a 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 Roanoke Creek Dam # 49a

Where does the data for Roanoke Creek Dam # 49a 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 Significant 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 Roanoke Creek Dam # 49a.