Dam Report

Varvil Dam dam

Michigan, USA Sawmill Creek Hazard Low
Today high
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Tonight low
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Dam height
20ft
Hazard rating
Low
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Varvil Dam -- None dam
Varvil Dam None · Sawmill Creek
About this dam

Varvil Dam

Varvil Dam, also known as Lake Dana Dam, is a privately owned structure located in Marquette, Michigan. Built in 1966 by the USDA NRCS, this earth dam stands at a height of 20 feet and stretches 160 feet in length. Its primary purpose is for recreation, with a storage capacity of 75 acre-feet and a surface area of 15 acres.

Situated on Sawmill Creek, Varvil Dam is regulated by the Michigan DEGLE and undergoes regular inspections to ensure its safety and compliance with state regulations. With a low hazard potential and a moderate risk assessment rating, this dam provides valuable recreational opportunities while also managing water resources in the area. Despite its age, the dam's condition is currently not rated, highlighting the need for ongoing maintenance and risk management measures to safeguard its long-term functionality and safety for both the environment and local community.

Although Varvil Dam does not have associated federal agency involvement, its presence plays a crucial role in the local ecosystem and recreational activities. With its uncontrolled spillway type and moderate risk assessment, it serves as a reminder of the importance of proper dam management and maintenance in ensuring the sustainable use of water resources amidst a changing climate.(Collectors please fact-check).

StateNone
River / streamSawmill Creek
NID IDMI01537
Owner typePrivate
Primary purposeRecreation
Dam typeEarth
Year built1966
Dam height20 ft
Dam length160 ft
Max storage75 AF
Normal storage20 AF
Surface area15.0 ac
Drainage area2.6 sq mi
Hazard potentialLow
ConditionNot Rated
Last inspectionTue, 01 Jan 1901 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 Varvil Dam -- inflows here typically show up in storage 24-72 hours later.

Track Varvil 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 Varvil Dam

Where does the data for Varvil 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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