Crab Orchard Lake, Illinois, USA

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Crab Orchard Lake is the largest of three reservoirs that are part of the 43,899-acre Crab Orchard National Wildlife Refuge in southwestern Williamson County of Illinois. Located a few miles east of Carbondale, home of Southern Illinois University, Crab Orchard Lake is a popular destination for boating, camping, fishing, and swimming. Spreading out over 6,695 watery acres, the reservoir was created after construction of a dam across Crab Orchard Creek in 1939-1941. The waters of nearby Devils Kitchen Lake and Little Grassy Lake, the smaller two reservoirs in the Wildlife Refuge, feed into Crab Orchard Lake–the fourth largest inland lake in Illinois.

Before the days of the Crab Orchard National Wildlife Refuge, farmland and forests were depleted from extensive agriculture and logging practices. In 1936 the Resettlement Administration acquired 32,000 acres to launch the Crab Orchard Creek Project, which outlined the construction of three lakes for recreation and industrial water supply. The project was transferred to the War Department during World War II, acquiring 12,000 more acres, and then to the Department of the Interior’s Fish and Wildlife Service after the end of the war. The Crab Orchard National Wildlife Refuge was established on August 5, 1947 for wildlife conservation, recreation, agriculture and industry.

Crab Orchard Lake is one of the finest angling and recreational lakes in the region. It is a fairly shallow lake with an average depth of about 9 feet, though the west end of the lake can reach depths of about 25 feet. Boating, swimming, water skiing and other water sports are popular summertime activities. There are two full-service marinas and about a dozen paved and gravel boat launch ramps located around the lake.

Crab Orchard Lake is teeming with fish, including a healthy population of largemouth bass. The largest largemouth bass caught in Crab Orchard Lake weighted in at an impressive 10.6 pounds. Other fish species include white bass, black and white crappie, flathead and channel catfish, and bluegill. Because of contaminants from heavy industry and munitions production during World War II, the Illinois Department of Public Health issued meal frequency guidelines for largemouth bass and channel catfish.

More than a million people visit the Crab Orchard National Wildlife Refuge annually to enjoy lake recreation, wildlife viewing, hiking, camping, and hunting. For a quick visit to the Refuge, a 2-1/2 mile auto tour introduces visitors to the area’s flora and fauna; white-tailed deer are usually seen in abundance at dawn and dusk. For visitors who prefer to explore on foot, the Refuge provides miles of hiking trails. Camping opportunities range from primitive campsites to modern RV sites. The Refuge also offers occasional special tours through areas that are closed to the general public. More than 200 species of birds make the Refuge their home, including osprey, bald eagles, songbirds, cormorants, Canada geese, snow geese, ducks, and herons. Waterfowl find refuge at Crab Orchard Lake during fall and spring migrations.

Because Crab Orchard Lake is nestled within the Crab Orchard Wildlife Refuge, the shoreline is not overrun with resorts and housing developments. So, take some time to enjoy the harmony between humans and wildlife in this beautiful and peaceful natural resource.

Things to do at Crab Orchard Lake

  • Vacation Rentals
  • Fishing
  • Boating
  • Swimming
  • Water Skiing
  • Camping
  • Hiking
  • Hunting
  • Wildlife Viewing
  • Birding
  • National Wildlife Refuge

Fish species found at Crab Orchard Lake

  • Bass
  • Black Bass
  • Bluegill
  • Catfish
  • Channel Catfish
  • Crappie
  • Largemouth Bass
  • Sunfish
  • White Bass
  • White Crappie

Crab Orchard Lake Photo Gallery

    Crab Orchard Lake Statistics & Helpful Links

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    Lake Type: Artificial Reservoir, Dammed

    Water Level Control: U.S. Fish & Wildlife Service

    Surface Area: 6,695 acres

    Normal Elevation (Full Pond): 405 feet

    Average Depth: 9 feet

    Maximum Depth: 25 feet

    Water Volume: 57,800 acre-feet

    Completion Year: 1941

    Drainage Area: 215 sq. miles

    Trophic State: Eutrophic

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    Trophic State | LakeLubbers

    Trophic State measures the level of algae and nutrients in a lake.

    An oligotrophic lake is very clear (blue in color) and does not support much plant or fish life. A hyper-oligotrophic lake is the clearest of all lakes, and is nearly devoid of plants and fish.

    A mesotrophic lake is slightly green and supports a moderate degree of plant and fish life. A lake's most desired trophic state is generally this mid-point - the mesotrophic state.

    A eutrophic lake is somewhat murky and supports a large amount of plant and fish life. A hypereutrophic lake is clouded with algae, plant life, and fish life. A eutrophic or hyper-eutrophic lake can be difficult to navigate by boat - and is often an unpleasant place to swim.

    The use of phosphorus-rich and nitrogen-rich fertilizer on lawns and golf courses surrounding a lake can cause it to become eutrophic or hypereutrophic.


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    Catchment or Drainage Area | LakeLubbers

    This is the surrounding area that drains into a lake, including land, rivers and their tributaries. This is also known as the lake's "catchment basin".

    Small lakes at the highest peaks of mountains have small drainage areas. The world's oceans have the largest drainage areas.


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    Lake-Area Population | LakeLubbers

    This is the estimated number of people who live in a house with a view of a lake, plus those who self-describe the lake as their home, for example: "I live at Smith Mountain Lake."


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    Water Residence Time | LakeLubbers

    This is the estimated time that it takes for an amount of water equal to the entire volume of a lake to flow out of - or evaporate from - the lake.

    Residence Time can be as short as a few days for fast-flowing small lakes, and can exceed 100 years for slow-flowing large lakes.


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    Completion Year | LakeLubbers

    This is the year that a reservoir was first filled to the reservoir's normal elevation - or the year that a natural lake was first dammed. A large reservoir can take more than a year to fill after its dam is first closed.

    The Grand Anicut in southern India is generally considered the world's oldest dam that still operates. Grand Anicut was constructed in the second century BC. It now impounds an irrigation network that includes roughly one million acres.

    You can find many of the the world's newest reservoirs on LakeLubbers. Many of the world's oldest reservoirs appear on the last page of that list.


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    Water Volume | LakeLubbers

    This is the estimated volume of water that a lake contains -- measured at the lake's normal elevation. By this measure, the world's largest freshwater lake is Siberia's Lake Baikal.

    You can find many of the the world's largest lakes (by water volume) on LakeLubbers.

    Water Volume can be measured in acre-feet, in cubic miles, or in cubic kilometers. One acre-foot is the amount of water needed to cover one acre (43,560 square feet) to a depth of one foot. One cubic mile equals 3,379,200 acre-feet. One cubic kilometer equals 810,713 acre-feet.

    1 acre-foot is equal to 325,851 US gallons. Siberia's Lake Baikal contains about 6,276,367,740,000,000 gallons of freshwater - nearly 1 million gallons for every living person on earth.

    The other - and more widely used - measure of a lake's size is the lake's surface acreage. By that measure, the world's largest freshwater lake is North America's Lake Superior.


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    Maximum Depth | LakeLubbers

    This is the estimated greatest depth of the water in a lake -- measured at the lake's normal elevation. The world's deepest lake is Siberia's Lake Baikal; that lake's maximum depth is estimated at 5,314 feet.

    You can find many of the the world's deepest lakes on LakeLubbers. If you select the last page of that list, you will find the (maximum depth of) the shallowest lakes in our database.


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    Average Depth | LakeLubbers

    This is the estimated average depth of the water in a lake -- measured at the lake's normal elevation. If the water volume and surface area of a lake are known, an estimate of the lake's average depth can be calculated:

    Water volume ÷ Surface Area = Average Depth

    Example: 1,000,000 acre-feet ÷ 20,000 acres = 50 feet average depth


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    Maximum Elevation | LakeLubbers

    This is a lake's highest water level, measured by the lake's surface distance above sea level, that can occur during flooding. A lake's highest possible maximum elevation is usually the top of the lake's dam or spillway.

    At lakes that include residential development, government regulations usually forbid the construction of homes below a lake's maximum elevation.


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    Minimum Elevation | LakeLubbers

    This is a lake's lowest water level, measured by the lake's surface distance above sea level, that can be reasonably expected to occur. Low lake levels can occur due to deliberate seasonal draw downs for irrigation or impending snow melt, reduced water inflows, drought and evaporation, residential or commercial water demands, and hydropower generation.

    Some lakes' minimum and maximum elevations are virtually the same. Lakes that generate hydropower may vary by several feet - according to power demand. Lakes whose primary purpose is to prevent flooding can seasonally vary by 100 feet or more.

    When some lakes reach their minimum elevation, their boat ramps may not be long enough to permit boat access - and boats docked on shallow parts of the lake may end up on dry ground. In those cases, kayakers and shore-based anglers may be among the few happy recreational users of the lake.


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    Normal Elevation | LakeLubbers

    This is a lake's normal water level, measured by the lake's surface distance above sea level. For a reservoir, this water level is also known as "full pond" or "full pool".

    You can find many of the world's highest-elevated lakes on LakeLubbers. Lakes with the lowest elevations (known by LakeLubbers) are shown on the final page of that list.


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    Shoreline Length | LakeLubbers

    This is the length of the exterior shoreline around a lake - measured at the lake's normal elevation. The shoreline length can be considerably shorter or longer when lake water levels are lower or higher than normal.

    A lake with many coves has a much longer shoreline than a lake of similar surface area that is nearly circular in shape.

    When known, the shoreline miles that we report in our statistics include only the lake's exterior shoreline, and exclude the shorelines of islands located within a lake's boundaries. In lakes with many islands, those islands' combined shorelines may exceed a lake's exterior shoreline.

    You can find many of the world's longest-shoreline lakes on Lakelubbers.


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    Surface Area | LakeLubbers

    This is the area (acreage, square kilometers, etc.) of the top surface area of a lake - measured at a lake's normal elevation. The surface area can be considerably smaller or larger when lake levels are lower or higher than normal. North America's Lake Superior is the world's largest freshwater lake by this measure.

    The other measure of a lake's size is the lake's water volume. By that measure, the world's largest freshwater lake is Lake Baikal in Siberia.

    You can find many of the world's largest lakes (acres) on Lakelubbers. There is no widely-accepted minimum surface area that defines a lake. What Lakelubbers describes as a lake, you might call a pond. The smallest lake that Lakelubbers currently includes is Hawaii's 2-acre Lake Waiau.


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    Water Level Control | LakeLubbers

    This is the organization that controls water releases or outflows from the lake or reservoir. In the USA, this is often the US Army Corps of Engineers, a power company, a municipal water system, an irrigation district, or a paper manufacturing company. In the case of private or gated lakes, a homeowners' association may be the lake's controlling authority.

    Many lakes cross borders, including North America's Great Lakes. The control of such lakes and their coveted freshwater may be amicably shared - or hotly disputed.

    "Water wars" continue at many lakes as growing populations and crop irrigation needs compete for the freshwater that lakes contain.


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    Lake Type | LakeLubbers

    There are 3 basic types of lakes that are currently included on LakeLubbers. 2 types may be dammed or not dammed, producing 5 classifications.

    - A Reservoir is a man-made freshwater lake that is usually created by damming rivers.

    - A Natural Freshwater Lake occurs naturally - often by glacial activity - and has a salinity of less than 30 parts per thousand. It may be dammed to produce electricity or for other reasons.

    - A Natural Saltwater Lake occurs naturally and has a salinity of more than 30 parts per thousand (ppt). It may be dammed.

    "Brackish" water may be categorized as freshwater or saltwater, depending on its salt content (salinity). Oligohaline water has less than 15 ppt of salt. Mesohaline water has 15-29 ppt. Polyhaline has 30-335 ppt.


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