Lake Butte des Morts
Lake Butte des Morts
Lake Butte des Morts is located in Wisconsin
Lake Butte des Morts
Lake Butte des Morts
LocationWinnebago County, Wisconsin,
United States
Coordinates44°04′23″N 088°38′31″W / 44.07306°N 88.64194°W / 44.07306; -88.64194
Primary inflowsFox River, Wolf River
Primary outflowsFox River
Basin countriesUnited States
Max. length11.6 km (7 mi)
Max. width2.8 km (2 mi)
Surface area34.7 km2 (8,575 acres)
Average depth2.1 m (7 ft)
Max. depth2.7 m (9 ft)
Water volume65,550,085 m3 (1.7316500×1010 US gal)
Residence time6 days
Shore length150.6 km (31 mi)
Surface elevation226 m (741 ft)
SettlementsOshkosh, Wisconsin,
Butte des Morts, Wisconsin
1 Shore length is not a well-defined measure.

Big Lake Butte des Morts (/ˌbjuːdəˈmɔːr/[1]) is a shallow freshwater lake located in the U.S. state of Wisconsin, in Winnebago County. It is part of the Winnebago Pool (also known as the Winnebago System) of lakes in east central Wisconsin, along with Lake Winnebago, Lake Poygan, and Lake Winneconne. The lake is fed by the Fox River in the southwest and the Wolf River draining from Lake Winneconne in the northwest, and drains via the Fox River southeast into Lake Winnebago.[2] The lake is part of the Butte des Morts region in Winnebago County, Wisconsin. This lake is not connected to Little Lake Butte des Morts, which is located to the north, downstream of Lake Winnebago, fed by the lower Fox River.

The name "Butte des Morts" was given by French colonial settlers. It means "Mound of the Dead", in reference to a nearby prehistoric Native American burial mound. In the Menominee language this place is known as Paehkuahkīhsaeh which means "small mound".[3]

Physical Aspects

With a surface area of 34.7 km2 (8,575 acres), it is the second smallest of the Winnebago Pool Lakes after Lake Winneconne. Much of the lake is flooded marshland, which was created by the damming of the Fox River downstream in Menasha in the 19th century.[2] This has resulted in the lake's flat and shallow character, with a maximum depth of 2.7 m (9 ft).[4] It is rather narrow, with a maximum length of 11.6 km (7 mi) but a maximum width of just 2.8 km (2 mi). Its total watershed (the combined drainage areas of the Fox and Wolf Rivers plus minor tributaries) is 5,566.2 square miles (14,416 km2).[2] Surface water temperature varies from a minimum of about 0.4 °C (33 °F) in the winter to a maximum of about 26.7 °C (80 °F) in the summer. The extensive littoral zone will usually freeze over in the winter, though only during particularly cold winters does the entire lake freeze over. The lake is polymictic, maintaining a continuously mixed water column with no patterns of seasonal temperature stratification.

Water Quality

Lake Butte des Morts is classified as eutrophic. The lake is listed with the Wisconsin DNR as having "impaired" water quality, citing high levels of phosphorus, mercury, and PCBs and low levels of dissolved oxygen, among other problems.[5][6] Much of these pollutants enter the watershed from agricultural and urban runoff.[5] Large algal blooms and high E. coli populations occasionally make the water unsafe for swimming.[5][7] The water is typically a murky brown or green color, with high turbidity, though prior to the 1970s the water was reported to be much clearer.[8] Lake Butte des Morts has been the subject of numerous DNR management and monitoring projects aimed at protecting or improving water quality, often alongside other bodies of water in the same watershed.[5]

Biology

Fish species found in the lake include walleye, drum, white bass, largemouth bass, smallmouth bass, carp, flathead and channel catfish, northern pike, crappie, yellow perch, bluegill and sturgeon.[9] Wetland plants common in and around the lake are American lotus, common reed, and wild rice. Invasive species include Chinese mystery snail, curly-leaf pondweed, Eurasian watermilfoil, round goby, rusty crayfish, and zebra mussel.[9] Dominant phytoplankton genera include Anabaena, Scenedesmus, and Melosira.[2]

Human Use

The city of Oshkosh lies between Lake Butte des Morts and Lake Winnebago. The unincorporated community of Butte des Morts lies on the lake's northern shore, west of Oshkosh. Lake Butte des Morts is part of the Fox-Wisconsin Waterway, which used to be used to travel between the Mississippi River and Lake Michigan, but with the closure of both the Portage Canal and the locks on the lower Fox River has ceased operation. A marked navigation channel guides passage across the lake from the inflow of the Wolf River in the west (connecting to Lake Poygan), to the outflow of the Fox River east to Lake Winnebago, a remnant of the waterway. Lake Butte des Morts is popular among both fishermen and recreational boaters during the warm months, and with ice fishermen in the winter. U.S. Highway 41 (US 41) / Interstate 41 (I41) spans the east end of the lake via a bridge and causeway combination. The bridge includes the Tribal Heritage Crossing, a designated national trail, which is a portion of the Wiouwash State Trail.[10] Terrell's Island is a DNR-organized wetlands conservation project located on the south shore, enclosed by a breakwall that extends some distance into the lake.

Welcome sign at the entrance to Terrell's Island

References

  1. ↑ Miss Pronouncer: Hear how to pronounce; The Wisconsin pronunciation guide for cities, counties, Indians & lawmakers
  2. 1 2 3 4 "Report on Lake Butte des Morts, Winnebago County, Wisconsin EPA Region V". NSCEP. USEPA.
  3. ↑ Hoffman, Mike. "Menominee Place Names in Wisconsin". The Menominee Clans Story. Retrieved 2018-10-06.
  4. ↑ "Lake Butte des Morts". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved May 24, 2018.
  5. 1 2 3 4 "Water Detail - Lake Butte des Morts, Lake Butte Des Mortes,Fox River,Arrowhead River and Daggets Creek Watershed (UF04, UF05, WR01)". dnr.wi.gov. Retrieved 2020-12-11.
  6. ↑ Robertson, Dale M.; Siebers, Benjamin J.; Diebel, Matthew W.; Somor, Andrew J. (2018). "Water-quality response to changes in phosphorus loading of the Winnebago Pool Lakes, Wisconsin, with special emphasis on the effects of internal loading in a chain of shallow lakes". Scientific Investigations Report. doi:10.3133/sir20185099.
  7. ↑ "Water Quality E. coli (Monitoring) Report". Wisconsin Beach Health.
  8. ↑ Sloey, William E. (1970). "The Limnology of Hypereutrophic Lake Butte des Morts, Wisconsin". Proceedings of Rhte 13th Conference on Great Lakes Research.
  9. 1 2 "Lakepage: Lake Butte des Morts". Wisconsin Department of Natural Resources. Retrieved 8 November 2020.
  10. ↑ Dickmann, Noell (June 13, 2015). "Tribal Heritage Crossing Designated as National Trail". The Post Crescent. Gannett Company. p. 3D.
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