Jmu Amphitheatre Dam dam
Jmu Amphitheatre Dam
The Jmu Amphitheatre Dam, located in Harrisonburg, Virginia, is a state-regulated structure managed by the Department of Conservation and Recreation. Standing at a height of 27 feet, this Earth-type dam serves primarily for flood risk reduction, with a storage capacity of 135 acre-feet. Despite its undetermined hazard potential and lack of a condition assessment rating, the dam is regularly inspected by the state and is equipped with emergency action plans to ensure public safety in case of any potential risks or incidents.
Surrounded by the scenic beauty of the Harrisonburg area, the Jmu Amphitheatre Dam plays a crucial role in managing water resources and protecting the local community from flooding events. Although the exact year of its completion is unknown, the dam continues to serve its purpose effectively, with state enforcement, permitting, and inspection processes in place to uphold its structural integrity and safety standards. With a strong emphasis on flood risk reduction, this state-owned structure exemplifies the importance of proactive water resource management in mitigating potential disasters.
For water resource and climate enthusiasts, the Jmu Amphitheatre Dam represents a key infrastructure for flood control in the region, supported by state jurisdiction and regulatory oversight. With a focus on public safety and risk management, this Earth-type dam stands as a testament to the collaborative efforts of various agencies in safeguarding communities from natural hazards. As efforts to assess and improve the dam's condition continue, its role in water resource management and climate resilience remains essential for the sustainable development of Harrisonburg and the surrounding areas.
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 Jmu Amphitheatre Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Muddy Creek At Mount Clinton | 1 cfs | → |
| North River Near Burketown | 105 cfs | → |
| S F Shenandoah River Near Lynnwood | 265 cfs | → |
| Middle River Near Grottoes | 76 cfs | → |
| Linville Creek At Broadway | 5 cfs | → |
| N F Shenandoah River At Cootes Store | 129 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Jmu Amphitheatre Dam.
Boat launches
- Lake Shenandoah Trail Rockingham County
- Grove Hill River Road Page County
- Us 340 Business Page County
- Bixlers Ferry Rd Page County
Campgrounds
- Boone Shelter
- Camp Site
- Hone Quarry Campground
- Dundo
- Loft Mountain Campground
- Loft Mountain - Shenandoah National Park
Fishing spots
- Briery Branch Day Use Area
- Staunton Dam Day Use Area
- Elkhorn Lake Day Use Area
- Tomahawk Pond Day Use Area
- Braley Pond Day Use Area
- Bealers Ferry Boat Launch
Paddle runs
- North River Campground To Camp May Flather
- Canyon Exit To Spruce Knob-Seneca Rocks Nra Boundary
- Big Bend Campground To Canyon Exit (Just Prior To Confluence With North Branch)
- Headwaters South Of Flint Mountain To St. Mary's Wilderness Boundary
- Shreve Store To Big Bend Campground
- Nf Boundary Along The South Fork Tye River Near Fdt 526 And State Highway 56 To Town Of Nash
Track Jmu Amphitheatre 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 Jmu Amphitheatre Dam
Where does the data for Jmu Amphitheatre 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 Jmu Amphitheatre Dam.