Yahara Lakes Info Page

From the Database

Lake Mendota went down 0.05 inches in the last 24 hours.
1,948,521 cubic feet of water was drained.
Net outflow rate of 22.55 cfs.

Lake Monona went down 0.21 inches in the last 24 hours.
2,463,396 cubic feet of water was drained.
Net outflow rate of 28.51 cfs.

Lake Waubesa went down 0.12 inches in the last 24 hours.
906,048 cubic feet of water was drained.
Net outflow rate of 10.49 cfs.

Lake Kegonsa went down 0.24 inches in the last 24 hours.
2,795,681 cubic feet of water was drained.
Net outflow rate of 32.36 cfs.

Current Streamflow

Pheasant Branch flow rate: 3.44 cfs.

Spring Harbor flow rate: 0.39 cfs.

Windsor flow rate: 1.22 cfs.

Yahara @ Main flow rate: 127.5 cfs.

Starkweather flow rate: 0 cfs.

Yahara @ McFarland flow rate: 4.08 cfs.

Yahara @ Exchange flow rate: 0 cfs.

Yahara @ Stoughton flow rate: 261.17 cfs.

Streamflow Obstruction

Date

Waubesa

Kegonsa

Head

Yahara Flow

Current

4.12 ft.

2.41 ft.

1.71 ft.

4 cfs.

2012-02-07

4.13 ft.

2.42 ft.

1.71 ft.

226 cfs.

2011-01-31

4.14 ft.

2.37 ft.

1.77 ft.

0 cfs.

Current streamflow is at 1.81% capacity based upon historical data for this water level.

Flow Rates

There is an unaccounted increase in streamflow through Waubesa at McFarland, and an even greater disparity downstream from Stoughton. This needs to be accounted for in some manner.

What if the dam breaks?

Initial flow rate of over 2656cfs will raise Monona 19 inches and lower Mendota 6 inches in the first 24 hours of the event. that rate will slow until the lakes equalize.

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