Grayling Dam dam
Grayling Dam
Grayling Dam, also known as Stump Pond Dam, is a local government-owned structure located in Grayling, Michigan. Completed in 1933, this dam on the Au Sable River stands at a height of 9 feet and has a length of 17.5 feet. With a primary purpose classified as 'Other,' the dam serves as a crucial component in the region's water resource management, providing a storage capacity of 306 acre-feet and a maximum discharge capability of 330 cubic feet per second.
Despite its age, Grayling Dam remains in good condition, with a moderate hazard potential and an undetermined risk assessment. The dam's spillway, of uncontrolled type, has a width of 18 feet, ensuring efficient water flow during periods of high discharge. With a storage capacity of 170 acre-feet under normal conditions, the dam plays a significant role in regulating water levels and protecting downstream areas from potential flooding events.
Water resource and climate enthusiasts will appreciate the vital role that Grayling Dam plays in managing the flow of the Au Sable River and ensuring water availability for various purposes in the region. Its strategic location in Crawford County, Michigan, highlights the importance of sustainable infrastructure in safeguarding water resources for both ecological and human needs. As efforts continue to assess and manage the risks associated with the dam, its historical significance and ongoing functionality underscore the critical intersection of water resource management and climate resilience in the area.
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 Grayling Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| South Branch Au Sable River Near Luzerne | 347 cfs | → |
| Au Sable River Near Red Oak | 1,450 cfs | → |
| Au Sable River At Mio | 1,390 cfs | → |
| Boardman R Above Brown Bridge Road Nr Mayfield | 245 cfs | → |
| Clam River At Vogel Center | 263 cfs | → |
| Jordan River Near East Jordan | 221 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Grayling Dam.
Boat launches
- Bright Glory Lane Grayling Charter Township
- Chase Bridge Road 10199, South Branch Township
- North Roberts Road Maple Forest Township
- Bradford Lake Drive Otsego Lake Township
- Briggs Road Otsego Lake Township
Campgrounds
- Ausable River State Forest Campground And Canoe Camp
- Burton's Landing State Forest Campground
- Keystone Landing State Forest Campground
- Lake Margrethe State Forest Campground
- 4-Mile Trail Camp
- Kneff Lake Campground
Track Grayling 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 Grayling Dam
Where does the data for Grayling 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 Grayling Dam.