Fox River at McHenry (Stratton Lock and Dam) tailwater

The past week

What floods at each level

• 12 ft

  McHenry Waste Water Treatment Plant property is threatened. Miller Road is threatened west of the river in McHenry.

• 11 ft

  Multiple structures along the river are threatened in downtown McHenry. River Road is threatened at IL-120 (Elm Street) in McHenry.

• 10.5 ft

  IL-176 is threatened near Holiday Hills.

• 9 ft

  Country Club Drive, Emerald Drive, and River Road near Chapel Hill Road are threatened in McHenry.

• 8.5 ft

  Residences threatened along Country Club Drive and Emerald Drive in McHenry. Roadways threatened at Miller Riverfront Park in McHenry.

• 8 ft

  Residences along River Road are threatened near Mary Lane in McHenry. Backwater causes Boone Creek to threaten parking lots in downtown McHenry. Numerous marinas are threatened in McHenry.

• 7 ft

  Low-lying sections of Miller Riverfront Park inundated in McHenry.

• 6 ft

  Backwater causes Boone Creek to inundate sections of the McHenry river walk.

• 5.5 ft

  Water reaches bankfull along Country Club Drive and Emerald Drive in McHenry.

• 5 ft

  Roadways and structures may be threatened in Frisch's Riverside subdivision along Lagoon and River Shore Drives.

• 4.5 ft

  Roadways and structures may be threatened in the Holiday Hills subdivison along Holiday Drive.

• 3.5 ft

  Boathouses threatened along the river downstream of the dam.

• 3 ft

  Fox Waterway Agency considers "no wake" order for the Fox River from Algonquin Dam to Stratton Dam.

Highest crests on record

When the water runs low

• 1.0

  Low water levels begin to impact operations at Stratton and Algonquin Dams.

• 0.5

  Approximate stage of the 1-in-10 annual chance flow (7-day average).

• 0.0

  River nears zero flow.

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