Hidden Trail Lake Reservoir Report
Last Updated: February 22, 2026
Hidden Trail Lake, also known as Ashbys Dam, is a private earth dam located in Spotsylvania, Virginia, along Brock Run.
Summary
Managed by the Department of Conservation and Recreation, this recreational dam stands at a height of 15 feet and has a storage capacity of 140 acre-feet, with a normal storage level of 90 acre-feet. The dam, completed in an unspecified year, spans 1600 feet and serves primarily for recreational purposes.
While the hazard potential of Hidden Trail Lake is undetermined and its condition remains unrated, the dam is subject to state regulation, inspection, and enforcement. With a designated emergency action plan frequency of one inspection per year, the dam's emergency preparedness and risk management measures have not been specified. Despite its lack of certain assessments, Hidden Trail Lake provides a picturesque setting for water and climate enthusiasts to enjoy various outdoor activities in the heart of Virginia's tranquil landscape.
°F
°F
mph
Wind
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Humidity
15-Day Weather Outlook
Dam Length |
1600 |
Dam Height |
15 |
River Or Stream |
BROCK RUN |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
140 |
Structural Height |
15 |
Hazard Potential |
Undetermined |
Nid Height |
15 |
Seasonal Comparison
5-Day Hourly Forecast Detail
Nearby Streamflow Levels
Po River Near Spotsylvania
|
74cfs |
Rappahannock River Near Fredericksburg
|
3160cfs |
Rapidan River Near Culpeper
|
611cfs |
North Anna River Near Partlow
|
49cfs |
Rappahannock River At Remington
|
1370cfs |
Aquia Creek Near Garrisonville
|
17cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
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. Investigations and studies are necessary.
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.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams 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, environment 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.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Hidden Trail Lake