Johns Creek Dam #1 Dam
Johns Creek Dam #1
Johns Creek Dam #1, also known as Mcdaniels Lake, is a flood risk reduction structure located in Craig, Virginia. Designed by Gannet Fleming, Inc. and the Virginia DCR - Division of Soil and Water Conservation, this earth dam stands at a height of 62 feet and has a length of 1500 feet. With a storage capacity of 3759 acre-feet and a drainage area of 19.1 square miles, this dam plays a crucial role in managing water resources in the region.
The dam is situated on Johns Creek and is regulated by the Department of Conservation and Recreation in Virginia. It has a high hazard potential but is currently in fair condition, as assessed during the last inspection in April 2020. The primary purpose of Johns Creek Dam #1 is flood risk reduction, serving to protect the surrounding area from potential flooding events. With its strategic location and design, this dam plays a vital role in mitigating the impact of extreme weather events on the community.
Although specific details about the construction year and spillway type are not provided, Johns Creek Dam #1 remains a key infrastructure for water resource management in Virginia. Its presence ensures the safety and resilience of the region in the face of climate change and increasing water-related challenges. For water resource and climate enthusiasts, this dam represents a case study in effective flood risk reduction and sustainable water management practices.
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 Johns Creek Dam #1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Roanoke River At Lafayette | 93 cfs | → |
| Walker Creek At Bane | 119 cfs | → |
| Roanoke River At Glenvar | 113 cfs | → |
| Johns Creek At New Castle | 23 cfs | → |
| New River At Radford | 2,250 cfs | → |
| S F Roanoke River Near Shawsville | 58 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Johns Creek Dam #1.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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About Johns Creek Dam #1
Where does the data for Johns Creek Dam #1 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 High 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 below 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.
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.