Nankin Mill Dam dam
Nankin Mill Dam
Nankin Mill Dam, located in Westland, Michigan, along the M Br River Rouge, is a gravity dam constructed in 1921 primarily for recreational purposes. Standing at a height of 17 feet and stretching 600 feet in length, this dam provides a storage capacity of 140 acre-feet and covers a surface area of 25 acres. With a drainage area of 62.88 square miles, the dam has a maximum discharge capacity of 2340 cubic feet per second.
Despite its satisfactory condition assessment as of January 2018, Nankin Mill Dam poses a high hazard potential due to its location and structural features. The dam is regulated by the Michigan Department of Environment, Great Lakes, and Energy (EGLE), with state permitting, inspection, and enforcement in place to ensure its safety and compliance with regulations. The dam's emergency action plan, last revised in May 2016, reflects a very high risk assessment, emphasizing the need for ongoing risk management measures and preparedness.
As a popular spot for recreation and leisure activities in Wayne County, Nankin Mill Dam serves as a vital piece of infrastructure for the local community. Its controlled spillway, measuring 73 feet in width, helps manage water flow and mitigate potential flooding risks. With a designated emergency contact plan and regular inspection schedule, the dam continues to provide both functional and recreational benefits while maintaining a focus on safety and risk management in the face of changing climate conditions.
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 Nankin Mill Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Middle River Rouge Near Garden City | 115 cfs | → |
| Middle River Rouge At Plymouth | 40 cfs | → |
| Lower River Rouge At Inkster | 132 cfs | → |
| River Rouge At Detroit | 114 cfs | → |
| Middle River Rouge At Dearborn Heights | 170 cfs | → |
| Lower River Rouge At Dearborn | 109 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Nankin Mill Dam.
Boat launches
- Hines Drive 33469, Livonia
- Hines Drive Livonia
- Monroe Street Dearborn
- Longwood Court Northville Township
- South Dearborn Street Melvindale
- Lake Point Boulevard Van Buren Township
Campgrounds
- Group Use Area
- Wayne County Fairgrounds Rv
- East Bend Group Camp
- Proud Lake State Rec Area
- Group Camp 2
- Group Camp 6
Track Nankin Mill 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 Nankin Mill Dam
Where does the data for Nankin Mill 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 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 Nankin Mill Dam.