Custis Dam dam
Custis Dam
Custis Dam, located in King William, Virginia, is a private-owned structure that serves primarily for recreational purposes. The dam, with a height of 12 feet and a length of 800 feet, impounds Bull Swamp, providing a storage capacity of 308 acre-feet. Despite its modest size, the dam plays a crucial role in the local environment and water resource management.
Managed by the Department of Conservation and Recreation, Custis Dam is regulated, inspected, and permitted by the state of Virginia. The dam's hazard potential is currently classified as "Undetermined" and its condition assessment is "Not Rated," indicating a need for further evaluation and monitoring. Emergency action plans and risk management measures for the dam are still under development, highlighting the importance of proactive measures to ensure the safety and integrity of the structure.
With its location in a scenic area and its role in providing recreational opportunities, Custis Dam stands as a significant feature in the landscape of King William County. As water resource and climate enthusiasts continue to monitor and assess the dam's condition, it remains an essential part of the local ecosystem and a focal point for outdoor activities in the region.
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.
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.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
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.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Custis Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Dragon Swamp At Mascot | 13 cfs | → |
| Chickahominy River Near Providence Forge | 21 cfs | → |
| Piscataway Creek Near Tappahannock | 13 cfs | → |
| Totopotomoy Creek Near Studley | 2 cfs | → |
| Mattaponi River Near Beulahville | 47 cfs | → |
| Pamunkey River Near Hanover | 86 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Custis Dam.
Boat launches
- Melrose Landing 1202, King And Queen County
- Waterfence Road 1504, King And Queen County
- Glass Island Road West Point
- White's Landing Road Gordon Landing
- Walkerton Boat Ramp
- Sunset Pointe Marina
Track Custis 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.
About Custis Dam
Where does the data for Custis 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 Undetermined 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.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Custis Dam.