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Lake And Watershed Facts

General Information:
Lake Name: Clear Lake
State: Iowa
County: Cerro Gordo
Nearest Municipalities: Clear Lake, Ventura
Latitude: 43° 08' 01" N (gauging station)
Longitude: 93° 22' 57" W (gauging station)
EPA Region: 7
USGS Major Basin Name: Upper Mississippi
USGS Minor Basin Name: Iowa-Skunk-Wapsipinicon
USGS Hydrologic Unit Code: 07080203
Major Tributaries: Ventura Marsh
Receiving Water Body: Clear Creek

Lake Information:
Lake surface area: 1,468 hectares (3625 Ac)
Maximum depth: 5.9 meters (19.2 ft)
Mean depth: 2.9 meters (9.6 ft)
Volume: 42,054,656 m3 (34,080 Ac-ft)
Length of shoreline: 22.7 kilometers (14.1 mi)
Shoreline development index: 1.60
Hydraulic residence time: 1.6 years

Watershed Information:
Watershed area: 3,420 hectares (8,454 Ac)
Watershed area/Lake area ratio: 2.3
Watershed Land Use:

Land Use

Total Hectares

Total Acres

Percent of Watershed Area

Row Crop

1969.9

4867.6

59%

Urban

335.4

828.9

10%

Marsh

294.1

726.6

9%

Grass

251.5

621.4

8%

Trees

182.5

451.0

5%

Road

152.1

375.8

5%

Farmstead

56.5

139.5

2%

Pasture

37.9

93.6

1%

State Park

26.8

66.1

1%

CRP

25.9

63.9

1%

Hay

9.2

22.7

<1%

Terraces

2.6

6.4

<1%


Source: Clear Lake Diagnostic and Feasibility Study

CLEAR Project  ~  PO Box 863  ~  Clear Lake, IA 50428  ~  641-923-2837 Ext.3