Dam Report

Swan Creek Dam dam

Michigan, USA Swan Creek Hazard Low
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Dam height
22ft
Hazard rating
Low
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Swan Creek Dam -- None dam
Swan Creek Dam None · Swan Creek
About this dam

Swan Creek Dam

Swan Creek Dam, located in Allegan, Michigan, was completed in 1937 and serves primarily for recreational purposes. This Earth dam stands at a height of 22 feet and has a hydraulic height of 16.6 feet, with a length of 660 feet. It has a maximum storage capacity of 2200 acre-feet, with a normal storage of 560 acre-feet, covering a surface area of 140 acres. The dam is situated on Swan Creek and is regulated by the Michigan Department of Environment, Great Lakes, and Energy (DEGLE).

With a low hazard potential and fair condition assessment, Swan Creek Dam has a moderate risk rating. The spillway type is uncontrolled, with a width of 24 feet. The dam undergoes inspections every five years, with the most recent one conducted in October 2019. The dam poses a moderate risk (3) and is under the jurisdiction of the State of Michigan, ensuring proper permitting, inspection, and enforcement measures are in place to manage any potential risks. Enthusiasts of water resources and climate may find Swan Creek Dam an intriguing structure to study, given its historical significance and the role it plays in the local ecosystem.

StateNone
River / streamSwan Creek
NID IDMI00006
Owner typeState
Primary purposeRecreation
Dam typeEarth
Year built1937
Dam height22 ft
Dam length660 ft
Max storage2,200 AF
Normal storage560 AF
Surface area140.0 ac
Drainage area41.1 sq mi
Hazard potentialLow
ConditionFair
Last inspectionThu, 24 Oct 2019 00:00:00 GMT

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.
Detailed forecast

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.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

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Deep dive

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.

TimeConditionTemp (°F)Snow (in)Rain (in)Humidity (%)Wind (mps)Wind dir
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Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks.

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Regional inflow

Nearby streamflow gauges

USGS streamgauges around Swan Creek Dam -- inflows here typically show up in storage 24-72 hours later.

Track Swan Creek 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.

FAQ

About Swan Creek Dam

Where does the data for Swan Creek 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 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.

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Premium feature

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Manage alerts in the Snoflo app

Custom alerts are configured in the iOS app -- favorite this dam, set a threshold, and you'll get a push the moment conditions cross.

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