Grayling Marsh dam
Grayling Marsh
Grayling Marsh, also known as Mud Lake, is a state-regulated fish and wildlife pond located in Aitkin, Minnesota. Managed by the Minnesota Department of Natural Resources, this marsh serves as a vital habitat for various species of birds, fish, and other wildlife. With a normal storage capacity of 438 acre-feet and a maximum storage of 1500 acre-feet, Grayling Marsh plays a crucial role in maintaining the ecological balance of the region.
Constructed with a buttress core type and a height of 8 feet, Grayling Marsh has a low hazard potential and is deemed to be in fair condition as of the last assessment in 2017. While the dam does not have a spillway or outlet gates, its primary purpose as a fish and wildlife pond underscores its importance in supporting biodiversity in the area. Visitors to Grayling Marsh can witness firsthand the beauty of this wetland ecosystem and appreciate the efforts made to preserve and protect this natural resource.
As climate change continues to impact water resources and ecosystems, the conservation of wetlands like Grayling Marsh becomes increasingly crucial. With state-mandated inspections, permitting, and enforcement in place, Grayling Marsh stands as a testament to the commitment of the Minnesota Department of Natural Resources to safeguarding the environment. By ensuring the continued health and functionality of Grayling Marsh, water resource and climate enthusiasts can witness the resilience of nature in the face of ongoing challenges.
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 Marsh -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Mississippi River At Aitkin | 2,240 cfs | → |
| St. Louis River At Scanlon | 2,670 cfs | → |
| Mississippi River At Grand Rapids | 550 cfs | → |
| Kettle River Below Sandstone | 432 cfs | → |
| Mississippi River At Brainerd | 2,380 cfs | → |
| Prairie River Near Taconite | 202 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Grayling Marsh.
Boat launches
- Public Access Road Aitkin County
- State Highway 65 Aitkin County
- 170th Place Aitkin County
- 561st Lane Aitkin County
- Aitkin County
- 299th Place Aitkin County
Campgrounds
- Sandy Lake-Coe
- Savanna Portage State Park Campground
- Hay Lake Campground
- Savanna State Forest -Hay Lake
- Aitkin County Campground
- Jacobson County Campground
Fishing spots
Paddle runs
- The Boundary Between Logan And Workman Townships In Aitkin County To The Dam Entrance Of The Flood Diversion Channel
- Carlton County State Aid Highway #12 Bridge To The Site Of Old Sandstone Hydroelectric Dam
- The Discharge Of The Flood Diversion Channel To Riverton
- The Confluence Of The Prairie River To The Boundary Of Logan And Workman Townships
- Upper Saint Louis
- The Site Of Old Sandstone Hydroelectric Dam To The Confluence With St. Croix River
Track Grayling Marsh 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 Marsh
Where does the data for Grayling Marsh 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 Low 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 Marsh.