Impoundment No.1 dam
Impoundment No.1
Impoundment No.1, located in Cedarville, Michigan, is a private-owned dam primarily used for tailings storage. With a height of 30 feet and a length of 7400 feet, this earth dam has a storage capacity of 3720 acre-feet. Despite being under the jurisdiction of the Mine Safety and Health Administration, the dam is not regulated or inspected by the state, posing a high hazard potential.
The last inspection of Impoundment No.1 was conducted in March 2010, with the condition assessment listed as "Not Available". With no emergency action plan or risk management measures in place, there are concerns about the safety and resilience of this dam in the face of potential climate-related challenges, such as increased precipitation and extreme weather events. It is crucial that proper monitoring and maintenance protocols are implemented to ensure the safety of surrounding communities and water resources.
As water resource and climate enthusiasts, it is important to advocate for increased oversight and enforcement of regulations to mitigate the risks associated with high-hazard dams like Impoundment No.1. By promoting transparency, emergency preparedness, and sustainable management practices, we can work towards safeguarding our water infrastructure and minimizing the potential impacts of climate change on these critical structures.
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 Impoundment No.1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Black River Near Garnet | 28 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Impoundment No.1.
Boat launches
- South Krause Road Pickford Township
- South Dock Road Raber Township
- Township Boat Launch Road Raber Township
- Sailors Encampment Drive 1600, St. Joseph Township
- West Dandelion Trail Clark Township
- South Scenic Drive Bruce Township
Campgrounds
- Munuscong River - State Forest
- Munuscong River State Forest Campground
- Kinross Rv Park East
- Lime Island State Forest Campground
- Kinross Rv Park West
- Detour State Forest Campground
Fishing spots
Paddle runs
- Origin At Confluence Of Outlets Of Frenchman Lake And Carp Lake (Sec 26, T44n, R6w) To West Section Line Of Sec 30, T43n, R5w
- Source In Sec 21, T47n, R12w To Mouth At Whitefish Bay
- East Branch From Western Forest Boundary (Sec 19, T46n, R6w) To Confluence With Mainstem
Track Impoundment No.1 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 Impoundment No.1
Where does the data for Impoundment No.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 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 Impoundment No.1.