King William Reservoir dam
King William Reservoir
The King William Reservoir, also known as the Lower Peninsula Regional Water Supply, is a vital public utility in Virginia designed for water supply purposes. Located in King William County, Virginia, this reservoir is fed by Cohoke Creek and has a capacity of 37,504 acre-feet of water, with a surface area of 1,526 acres. The dam type is an earth dam, standing at a height of 88 feet and a length of 1,700 feet, providing essential water storage for the region.
Despite being a crucial water resource, the King William Reservoir has an undetermined hazard potential and is currently not rated for its condition. It has not undergone recent inspections, and there is no information available on its emergency action plan or risk assessment measures. The reservoir's primary purpose is to supply water to the surrounding area, but there are no details on the year of completion or any modifications that have been made to the structure over the years.
Given its importance as a water supply source in the region, it is essential for water resource and climate enthusiasts to monitor the King William Reservoir's condition closely and ensure that necessary inspections and risk assessments are conducted regularly to maintain its integrity and functionality. As a critical infrastructure for the community, the reservoir plays a key role in ensuring water security and stability in the area, making it a significant asset for both residents and the environment.
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 King William Reservoir -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Totopotomoy Creek Near Studley | 2 cfs | → |
| Piscataway Creek Near Tappahannock | 13 cfs | → |
| Mattaponi River Near Beulahville | 47 cfs | → |
| Chickahominy River Near Providence Forge | 21 cfs | → |
| Dragon Swamp At Mascot | 13 cfs | → |
| Pamunkey River Near Hanover | 86 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near King William Reservoir.
Track King William Reservoir 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 King William Reservoir
Where does the data for King William Reservoir 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 King William Reservoir.