Dam Report

Midlothian Creek Dam dam

Illinois, USA Midlothian Creek Hazard High
Today high
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Tonight low
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Dam height
22ft
Hazard rating
High
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Midlothian Creek Dam -- None dam
Midlothian Creek Dam None · Midlothian Creek
About this dam

Midlothian Creek Dam

Midlothian Creek Dam, also known as Twin Lakes, is a local government-owned structure located in Oak Forest, Illinois. Completed in 1975, the dam has a primary purpose of flood risk reduction along the Midlothian Creek. Standing at 22 feet high and with a length of 1515 feet, the earth dam plays a crucial role in managing water flow and protecting the surrounding area from potential flooding events.

Managed by the Illinois Department of Natural Resources, the Midlothian Creek Dam is regulated, inspected, and enforced by the state to ensure its safety and functionality. With a storage capacity of 1279 acre-feet, the dam not only serves as a flood control structure but also offers recreational opportunities in the area. Despite its high hazard potential, the dam's risk assessment is rated as moderate, indicating the need for continued monitoring and maintenance to mitigate any potential risks.

The dam's uncontrolled spillway, with a width of 500 feet, allows for the safe release of excess water during peak flow events. Although the condition assessment is not available, the dam's emergency action plan was last revised in 1983. With its strategic location and vital role in flood risk reduction, the Midlothian Creek Dam stands as a critical infrastructure in safeguarding the community and the environment from the impacts of extreme weather events and water resource management.

StateNone
River / streamMidlothian Creek
NID IDIL01002
Owner typeLocal Government
Primary purposeFlood Risk Reduction
Dam typeEarth
Year built1975
Dam height22 ft
Dam length1,515 ft
Max storage1,279 AF
Normal storage148 AF
Surface area30.0 ac
Drainage area10.7 sq mi
Hazard potentialHigh
ConditionNot Available
Last inspectionTue, 01 May 2018 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 Midlothian Creek Dam -- inflows here typically show up in storage 24-72 hours later.

Track Midlothian Creek Dam in the Snoflo app

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FAQ

About Midlothian Creek Dam

Where does the data for Midlothian 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 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.

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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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