Aquatic Invasive Species
Contact information
For information on Lakes in Wisconsin, contact:
DNR Lake
Division of Water
Bureau of Water Quality
Clean Boats, Clean Waters Contacts

Twin Bear Lake -- Twin Bear County Park

Location:

Boats Inspected (Boats Inspected:2004=0,2005=482,2006=440,2007=1205,2008=1172,2009=1318,2010=1782,2011=1636,2012=1452,2013=1342,2014=1151,2015=1169,2016=1370,2017=1213,2018=1331,2019=1380,2020=178,2021=1473,2022=1273,2023=1260,2024=954|)

People Contacted (People Contacted:2004=0,2005=979,2006=1024,2007=2945,2008=3013,2009=3145,2010=4184,2011=4060,2012=3490,2013=3431,2014=2655,2015=2566,2016=3447,2017=2874,2018=3219,2019=3135,2020=449,2021=3280,2022=2683,2023=3343,2024=2253|)

Hours Spent (Hours Spent:2004=0.75,2005=272.5,2006=159,2007=456.5,2008=430,2009=463.5,2010=730.5,2011=866.5,2012=658.25,2013=673.5,2014=527.5,2015=480,2016=629,2017=558,2018=487,2019=579,2020=95.5,2021=596,2022=477,2023=575.5,2024=464|)

Hours Spent - Paid vs. Volunteer (Paid Hours:2008=410,2009=463.5,2010=623.5,2011=512.5,2012=610.5,2013=563.0,2014=444.5,2015=440,2016=495,2017=446,2018=390,2019=438,2020=0,2021=503,2022=383,2023=385.5,2024=322|Volunteer Hours:2008=20,2009=0,2010=107,2011=354.0,2012=47.75,2013=110.5,2014=83,2015=40,2016=134,2017=112,2018=97,2019=141,2020=95.5,2021=93,2022=94,2023=190,2024=142|)

Note: for the first few years, the Clean Boats form only asked for total hours. Later, most boat inspectors used the newer form which asked for Paid vs. Volunteer.

Twin Bear Lake has the following aquatic invasive species:
Chinese Mystery Snail, Eurasian Water-Milfoil, Rusty Crayfish