Petenwell Flowage, Wisconsin Rapids,Fourteenmile Creek,Big Roche A Cri Creek,Lower Yellow (Juneau Co.) River Watershed (CW02)
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Petenwell Flowage, Wisconsin Rapids,Fourteenmile Creek,Big Roche A Cri Creek,Lower Yellow (Juneau Co.) River Watershed (CW02)
Petenwell Flowage (1377100)
23000.81 Acres
Natural Community
Natural communities (stream and lake natural communities) represent model results that use predicted flow and temperature based on landscape features and related assumptions. Ranges of flow and temperature associated with specific aquatic life communities (fish, macroinvertebrates) help biologists identify appropriate resource management goals. Wisconsin Natural Communities.
Reservoir
Year Last Monitored
This is the most recent date of monitoring data stored in SWIMS. Additional surveys for fish and habitat may be available subsequent to this date.
2024
Poor
 
This is impaired
High Phosphorus Levels, Mercury Contaminated Fish Tissue, Dioxin Contaminated Fish Tissue, Low DO, PCBs Contaminated Fish Tissue, PFOS Contaminated Fish Tissue
Mercury, Dioxin, PFOS, Total Phosphorus, PCBs
 
Adams, Juneau
Trout Water 
Trout Waters are represented by Class I, Class II or Class III waters. These classes have specific ecological characteristics and management actions associated with them. For more information regarding Trout Classifications, see the Fisheries Trout Class Webpages.
No
Outstanding or Exceptional 
Wisconsin has designated many of the state's highest quality waters as Outstanding Resource Waters (ORWs) or Exceptional Resource Waters (ERWs). Waters designated as ORW or ERW are surface waters which provide outstanding recreational opportunities, support valuable fisheries and wildlife habitat, have good water quality, and are not significantly impacted by human activities. ORW and ERW status identifies waters that the State of Wisconsin has determined warrant additional protection from the effects of pollution. These designations are intended to meet federal Clean Water Act obligations requiring Wisconsin to adopt an 'antidegradation' policy that is designed to prevent any lowering of water quality - especially in those waters having significant ecological or cultural value.
No
Impaired Water 
A water is polluted or 'impaired' if it does not support full use by humans, wildlife, fish and other aquatic life and it is shown that one or more of the pollutant criteria are not met.
Yes

Fish and Aquatic Life

Current Use
The use the water currently supports. This is not a designation or classification; it is based on the current condition of the water. Information in this column is not designed for, and should not be used for, regulatory purposes.
Restricted Aquatic Life
Fish and Aquatic Life communities are not fully supported in this ecosystem.
Attainable Use
The use that the investigator believes the water could achieve through managing "controllable" sources. Beaver dams, hydroelectric dams, low gradient streams, and naturally occurring low flows are generally not considered controllable. The attainable use may be the same as the current use or it may be higher.
WWSF
Streams capable of supporting a warm waterdependent sport fishery. Representative aquatic life communities associated with these waters generally require cool or warm temperatures and concentrations of dissolved oxygen that do not drop below 5 mg/L.
Designated Use
This is the water classification legally recognized by NR102 and NR104, Wis. Adm. Code. The classification determines water quality criteria and effluent limits. Waters obtain designated uses through classification procedures.
Cold
Streams capable of supporting a cold water sport fishery, or serving as a spawning area for salmonids and other cold water fish species. Representative aquatic life communities, associated with these waters, generally require cold temperatures and concentrations of dissolved oxygen that remain above 6 mg/L. Since these waters are capable of supporting natural reproduction, a minimum dissolved oxygen concentration of 7 mg/L is required during times of active spawning and support of early life stages of newly-hatched fish.

Overview

Petenwell Lake is a soft water, drainage impoundment on the Wisconsin River that is the second largest lake within the State. Its water level is controlled by a hydroelectric power dam having a 42-foot head and it is owned by the Wisconsin River Power Company. The water has a light brown color, is alkaline, and has a low transparency. Northern pike, walleye, largemouth bass, bluegill, pumpkinseed, crappie, perch, and bullhead are the significant game fish species present. Commercial fishing for rough fish species and bullhead has taken place. Industrial pollution is a problem. Partial winterkill conditions exist. Public parks (multiple-use areas) are present in Adams and Juneau Counties. Commercial facilities are available and a few dwellings are present. Several species of puddle ducks nest at the flowage and there is also a heron rookery. Canada geese, coot, puddle ducks and divers use the area during their spring and fall migrations. Beaver are present and muskrat are significant.

Source: 1969, Surface Water Resources of Juneau County Petenwell Flowage, T18N, R4E, Section 4 Surface Acres = 22,218, S.D.F. = 3.88, Maximum Depth = 44 feet

Date  1969

Author   Aquatic Biologist

Historical Description

Jim Kreitlow (NOR) documented dissolved oxygen standards violations while sampling the lake in the mid 1990s. Dissolved oxygen concentrations below 5 mg/l were generally found during the early morning hours, probably a result of algae respiration. Values for pH above 9.0 were documented in 1996, 1997 and 1998.

The cause of these impairments is likely the result of excessive nutrient loading (phosphorus) from point and nonpoint sources in the watershed. As a result, the flowage is very eutrophic with abundant algae growth. The University of Wisconsin Stevens Point completed a nutrient and water budget modeling study in 1999 on Petenwell Flowage. Water chemistry data collected in 1996 indicates chlorophyll a concentrations ranged from 8.4 to 66.6 ug/l and total phosphorus concentrations ranged from 85 to 171 ug/l.

The Petenwell and Castle Rock Flowages Comprehensive Management Plan was completed in 1996. The report indicates severe algal blooms cause periodic shifts in dissolved oxygen. During photosynthesis, dissolved oxygen values are high (11-12 mg/l) but during respiration, they can drop below 5.0 mg/l (STORET 1992 was referenced). The report also indicates blue-green algae are the dominant phytoplankton in the Petenwell and Castle Rock Flowages. The report also references sediment sampling has been completed in both flowages however additional sampling is recommended. Previous sampling has found high levels of 2,3,7,8-TCDD and 2,3,7,8-TCDF in sediments. PCBs and mercury have also been detected at limited sampling sites. Currently, a fish consumption advisory exists on the flowage for PCBs, dioxin and mercury.

Monitoring conducted in 2003 found frequent pH exceedances during the summer.

Date  2006

Author   Aquatic Biologist

Petenwell Flowage, Wisconsin Rapids,Fourteenmile Creek,Big Roche A Cri Creek,Lower Yellow (Juneau Co.) River Watershed (CW02) Fish and Aquatic LifePetenwell Flowage, Wisconsin Rapids,Fourteenmile Creek,Big Roche A Cri Creek,Lower Yellow (Juneau Co.) River Watershed (CW02) RecreationPetenwell Flowage, Wisconsin Rapids,Fourteenmile Creek,Big Roche A Cri Creek,Lower Yellow (Juneau Co.) River Watershed (CW02) Fish Consumption

Impaired Waters

Petenwell (Flowage) Lake has been on the state's 303(d) impaired waters list since 1998 for Total Phosphorus (TP), Dioxin, PCBs, and Mercury. This lake was placed under a special fish consumption advisory for PFOS in 2020; this lake had a listing of PFOS in fish tissue placed on the 2022 Impaired Waters List.

Date  2022

Author  Ashley Beranek

Condition

Wisconsin has over 84,000 miles of streams, 15,000 lakes and milllions of acres of wetlands. Assessing the condition of this vast amount of water is challenging. The state's water monitoring program uses a media-based, cross-program approach to analyze water condition. An updated monitoring strategy (2015-2020) is now available. Compliance with Clean Water Act fishable, swimmable standards are located in the Executive Summary of Water Condition in 2018. See also the 'monitoring and projects' tab.

Reports

2023 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
2021 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Sp
2021 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
2020 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Repor
2020 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
EPA Approval Letter for site-specific criteria for phosphorus for Castle Rock Lake, Petenwell Lake, and Lake Wisconsin
EPA's Review of the Wisconsin Department of Natural Resources Request for Approval of Site-Specific Total Phosphorus Criteria For Petenwell Lake, Castle Rock Lake, and Lake Wisconsin Under Section 303(c) of the Clean Water Act
2019 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
Site-Specific Total Phosphorus Criteria for Petenwell Lake, Castle Rock Lake, and Lake Wisconsin: Technical Support Document
2020 Comprehensive WQ Assessments
2018 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
Final Draft 2018 Impaired Waters List
Final Assessment Data from TSI Package and Assessment Units 2018
2017 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
Comprehensive 2018 Lake/Impoundment Water Quality Assessments
2016 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
2015 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
2015 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Eurasian Watermilfoil Survey Map
Comprehensive 2016 Lake Reservoir Assessments
Petenwell Plant Survey Summary 2010-2014
Petenwell 2010 Plant Data Spreadsheet
2014 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
Comprehensive 2014 TP Lakes Assessment
2013 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
Adaptive Management Plan Annual Report 2013 [Wisconsin River Power Company]
Petenwell Plant Survey Summary 2010-2013
2012 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
2012 Petenwell Plant Summary
Petenwell Plant Survey Final Report 2011
2011 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
Big Roche A Cri Watershed Plan 2011 (CW06)
Petenwell Lake 1377100 Chla PkgRpt2012
Petenwell Lake 1377100 TP PkgRpt2012
2010 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
2009 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
2009 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Order Amending Purple Loosestrife Control Measures in Approved Monitoring Plan
Petenwell Lake, Adams County - Aquatic Plant Sampling Map (1) (195 mpts)
Petenwell Lake, Adams County - Aquatic Plant Sampling Map (195 mpts)
Petenwell Lake, Adams County - Aquatic Plant Sampling Map (2) (195 mpts)
Petenwell Lake, Adams County - Aquatic Plant Sampling Map (3) (195 mpts)
Petenwell Lake, Adams County - Aquatic Plant Sampling Map (4) (195 mpts)
Petenwell Lake, Adams County - Garmin Text File
2008 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Supplement to the FERC Approved Invasive Species Monitoring Plan
2008 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
2007 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
Petenwell Lake Slow no Wake Areas
2006 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
2005 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
2005 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Order Revising Order Approving Purple Loosestrife and Eurasian Watermilfoil Monitoring Plan Pursuant to License Article 408
2004 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
2003 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Invasive Species Monitoring Report
2003 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Order Approving Purple Loosestrife and Eurasian Watermilfoil Monitoring Plan Pursuant to License Article 408
2002 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Amendment to the Proposed Invasive Species Management Plan
2002 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. P-1984A and P-1984B, Purple Loosestrife and Eurasian Watermilfoil Monitoring Plans
PETENWELL FLOWAGE IMPAIRED WATERS LISTING DOCUMENTATION
2001 Petenwell and Castle Rock Hydroelectric Projects, FERC Project Nos. 1984A and 1984B, Order Issuing New License (Major Project)
PETENWELL FLOWAGE WATER QUALITY MODELING
Lake Bathymetry Map for Petenwell Lake

Recommendations

Educate and engage residents
Adams County proposes to provide educational and technical assistance to the public and Adams County lake organizations for the installation of shoreline buffers on waterways so they comply with the Adams County Shoreland, Wetland, and Habitat Protection Ordinance.
Habitat Restoration - Shoreland
Water Quality Modeling
Adams County proposes to provide up to 75% of the cost of shoreland restoration practices to lake front property owners on the Petenwell Flowage. Grant funds will be distributed to fund removal of sea walls, minor bank re-shaping, placement of rip-rap, establishment of vegetative buffers and implementation if individual stormwater management plans.
Lake Classification
Adams County proposes to wrap up its county-wide lake classification effort. Major project elements to include: 1) completion of water sampling, 2) development of lakes classification report and individual lake summaries, 3) development of a powerpoint presentation, 4) four public meetings, 5) expansion of shoreline restoration packet.
Lake Classification
Adams County continue its lake classification efforts through collecting and assessing chemical and biological data on all lakes within the county that afford public access. Major project componants to include: 1) collection and assessment of chemical and biological data, 2) development of a "library" of information for public use, 3) development of management recommendations, 4) I&E for riparians and lake users.
Lake Classification
Adams County proposes to initiate a Lakes Classification effort to assist in comprehensive plan development for communities surrounding its lakes with public access. Phase 1 elements, to be funded with this grant, include: 1) delination of surface watersheds and flow patterns, 2) delineation of ground watersheds, 3) identification and mapping of land uses, 4) inventory and mapping of shoreline erosion and development problems, 5) identification and mapping of sensitive/critical areas and natural heritage habitats, 6) verification of wetland delineations, 7) delineations of lake watersheds, 8) development of lake maps
Water Quality Modeling
Golden Sands Resource Conservation and Development Council, Inc. proposes to complete the second year of funding for water quality modeling of the Petenwell Flowage. Implementation of this plan will provide information on the following: 1) water/nutrient budget for the Petenwell Flowage, 2) sources of nutrients, 3) effects of nutrient reduction, and 4) prediction of the total maximum daily loads necessary to reach desired target nutrient levels. A working Model will be provided as well as a final report will be available for interested parties.

Management Goals

Wisconsin's Water Quality Standards provide qualitative and quantitative goals for waters that are protective of Fishable, Swimmable conditions [Learn more]. Waters that do not meet water quality standards are considered impaired and restoration actions are planned and carried out until the water is once again fishable and swimmable

Management goals can include creation or implementation of a Total Maximum Daily Load analysis, a Nine Key Element Plan, or other restoration work, education and outreach and more. If specific recommendations exist for this water, they will be displayed below online.

Monitoring

Monitoring the condition of a river, stream, or lake includes gathering physical, chemical, biological, and habitat data. Comprehensive studies often gather all these parameters in great detail, while lighter assessment events will involve sampling physical, chemical and biological data such as macroinvertebrates. Aquatic macroinvertebrates and fish communities integrate watershed or catchment condition, providing great insight into overall ecosystem health. Chemical and habitat parameters tell researchers more about human induced problems including contaminated runoff, point source dischargers, or habitat issues that foster or limit the potential of aquatic communities to thrive in a given area. Wisconsin's Water Monitoring Strategy was recenty updated.

Grants and Management Projects

Project Name (Click for Details)Year Started
ADAMS COUNTY: LCO-Adams Co. Lakes Class Phase 22004
ADAMS COUNTY: RES-Adams Ord. Imp. 22013
ADAMS COUNTY: Adams County Shoreline Restoration Workshop for Professionals2001
ADAMS COUNTY: RES-Petenwell Restoration2006
ADAMS COUNTY: 319 Match - LMI - 14-Mile Watershed 9-Key Elements Plan Implementation2021
ADAMS COUNTY: Adams County Lakes Shoreline Development Audit1995
GOLDEN SANDS: Petenwell Flowage Water Quality Modeling1996
GOLDEN SANDS RC&D: Golden Sands RC&D Petenwell & Castle Rock Flowages2015
ADAMS COUNTY: LCO-Adams Co Lakes Class - Phase 32005
PETENWELL & CASTLE ROCK STEWARDS: PACRS Edu-Outreach2013
GOLDEN SANDS: LMI-Petenwell Flowage Water Quality Monitoring1997
ADAMS COUNTY: Adams AIS Specialist2006
ADAMS COUNTY: LCO-Adams Co Lakes Classification - Phase 12003
Fish Propagation Actions2001

Monitoring Projects

WBICOfficial Waterbody NameStation IDStation NameEarliest Fieldwork DateLatest Fieldwork DateView StationView Data
1377100Petenwell Lake293144Wisconsin River - 1 Mi Ne Of Yellow Banks6/3/19986/17/1998MapData
1377100Petenwell Lake10017913Petenwell Lake -- Access - Devil's Elbow9/3/20058/19/2023MapData
1377100Petenwell Lake10031202Juneau County Wilderness Park bay5/27/20109/26/2012MapData
1377100Petenwell Lake10034892503 Barnum Bay Trail7/27/20107/27/2010MapData
1377100Petenwell Lake013164Petenwell Flowage - West Of Barnum Bay10/4/19946/17/1998MapData
1377100Petenwell Lake293061West Petenwell Ditch - Ditch-16th Ave And 13th9/23/198011/18/1981MapData
1377100Petenwell Lake013162Petenwell Flowage - 1 Mile Ab Dam9/13/19946/17/1998MapData
1377100Petenwell Lake10031211Petenwell Flowage - Strongs Prairie Flats at 3 mi. NE of dam5/26/20109/26/2012MapData
1377100Petenwell Lake013155Petenwell Flowage - Sed End T18nr04e04MapData
1377100Petenwell Lake013023Wisconsin River - Above Petenwell Dam8/17/19757/23/1981MapData
1377100Petenwell Lake013169Petenwell Flowage - 1 Mi Se Longview Pt6/17/19989/16/2023MapData
1377100Petenwell Lake293127Castle Rock Lake - West Side Just Ab Dam / Petenwell Sed Mid (T20nr5es32)2/20/19962/20/1996MapData
1377100Petenwell Lake10021031Petenwell Flowage River Mile 180.29/13/19949/13/1994MapData
1377100Petenwell Lake013165Wisconsin River-Petenwell Flowage - West Of Adams County Park2/21/19962/21/1996MapData
1377100Petenwell Lake293060West Petenwell Ditch - 10th St.9/23/19801/21/1982MapData
1377100Petenwell Lake10017929Petenwell Lake -- Petenwell Park Access off Bighorn Dr. (Adams Co)7/28/20048/12/2022MapData
1377100Petenwell Lake013168Petenwell Flowage - NE Of Longview Pt6/3/19989/9/2015MapData
1377100Petenwell Lake10052675Petenwell Lake Longview Access5/31/20195/31/2019MapData
1377100Petenwell Lake10040779Petenwell-Bay N of Twin Lakes Access7/19/20137/19/2013MapData
1377100Petenwell Lake013166Wisconsin River-Petenwell Flowage - Nw Of East Dike2/20/19962/20/1996MapData
1377100Petenwell Lake10031169Petenwell Flowage 03 (7.8 miles US of dam)4/20/20101/1/2015MapData
1377100Petenwell Lake10033600Petenwell Lake - Dock 1-2 at Adams Co. Petenwell Park S of boat basin8/19/20238/19/2023MapData
1377100Petenwell Lake013134Petenwell Flowage - Deep Hole7/31/19739/9/2015MapData
1377100Petenwell Lake293126Castle Rock Lake - N Of Yellow R Arm / Petenwell Sed Up (T20nr5es09)2/19/19962/19/1996MapData
1377100Petenwell Lake121Wisconsin River at Fish Lake5/6/19765/6/1976MapData
1377100Petenwell Lake293128Petenwell Sed Low (T19nr4es22)MapData
1377100Petenwell Lake013153Petenwell Flowage - Sed Upper T20nr5es8MapData
1377100Petenwell Lake10029567Petenwell Lake - Off Private Dock - Arkdale5/26/20086/4/2023MapData
1377100Petenwell Lake10030964Petenwell Lake -- 20th Drive Access9/16/20119/13/2013MapData
1377100Petenwell Lake10031199Upper Petenwell Flowage - south of Catfish Bay5/27/20108/29/2012MapData
1377100Petenwell Lake293145Petenwell Flowage at Yellow Banks8/14/19756/17/1998MapData
1377100Petenwell Lake293138Petenwell Flowage - Near 20th Ave.10/4/19946/17/1998MapData
1377100Petenwell Lake013015Wisconsin River Petenwell Flowage - 1 Mile North Of Long View Point8/17/19752/24/1993MapData
1377100Petenwell Lake10017910Petenwell Lake - Wilderness Park Access5/28/20065/6/2024MapData
1377100Petenwell Lake293134Petenwell Flowage - Pilot Cove6/29/19936/30/1993MapData
1377100Petenwell Lake10017599Petenwell Lake / Wisconsin River -- Access off County Hwy Z7/6/20127/31/2024MapData
1377100Petenwell Lake10031168Petenwell Flowage TMDL monitoring 04 (10.4 miles US of dam)4/20/20101/1/2015MapData
1377100Petenwell Lake10017433Petenwell Lake / Wisconsin River -- Access near Brown Deer Dr9/17/20115/31/2019MapData
1377100Petenwell Lake10031208Petenwell Flowage - 0.75 mi. south of 10th St. boat landing4/27/20109/26/2012MapData
1377100Petenwell Lake122Wisconsin River at Lake Petenwell5/5/19765/6/1976MapData
1377100Petenwell Lake013189Petenwell Lake -- Chicago Ave Boat Landing9/16/20115/31/2019MapData
1377100Petenwell Lake10037893Lake Petenwell near shore HAB response monitoring7/25/20127/25/2012MapData
1377100Petenwell Lake10021032Petenwell Flowage Rm 185.49/13/19949/13/1994MapData
1377100Petenwell Lake10021053Petenwell Flowage 2 Mi Se Of Armenia Boat Landing.6/17/19986/17/1998MapData
1377100Petenwell Lake10017912Petenwell Lake / Wisconsin River -- Fourteen Mile Creek Access8/7/20116/4/2014MapData
1377100Petenwell Lake10031171Petenwell Flowage 01 (1.8 miles US of dam)4/20/20101/1/2015MapData
1377100Petenwell Lake10057939Petenwell Flowage - Sandbar @ Wisconsin River Mouth7/10/20237/10/2023MapData
1377100Petenwell Lake013182Petenwell Flowage -- Petenwell Park Boat Launch - Bighorn DriveMapData
1377100Petenwell Lake10017918Petenwell Lake / Wisconsin River -- Access off Apache Ln7/27/20127/27/2012MapData
1377100Petenwell Lake10031200Upper Petenwell Flowage - east of Hochee Point5/27/20108/29/2012MapData
1377100Petenwell Lake013021Wisconsin River - Near Petenwell Park8/17/19758/17/1975MapData
1377100Petenwell Lake10018501Wisconsin River / Petenwell Flowage -- Access off Blackhawk Dr.6/19/20125/31/2019MapData
1377100Petenwell Lake013022Wisconsin River - 3.2 Mi Above Petenwell DamMapData
1377100Petenwell Lake10021041Petenwell Flowage 1 Mi Se Of Longview Point6/3/19986/3/1998MapData
1377100Petenwell Lake10031198Upper Petenwell Flowage - Yellow Banks5/27/20108/29/2012MapData
1377100Petenwell Lake013180Petenwell Flowage - County Park Monroe Center - Offshore Cylindro Sample7/7/20046/15/2006MapData
1377100Petenwell Lake10031207Petenwell Flowage - 0.5 mi. NE of 10th St. boat landing5/26/20109/26/2012MapData
1377100Petenwell Lake10031196Upper Petenwell Flowage - SW of Cattail Islands5/27/20108/29/2012MapData
1377100Petenwell Lake10031206Petenwell Flowage - 0.5 mi. W of Petenwell Cty Pk6/10/20109/26/2012MapData
1377100Petenwell Lake10031170Petenwell Flowage 02 (4.7 miles US of dam)4/20/20101/1/2015MapData
1377100Petenwell Lake10031203Petenwell Flowge - south of Monroe Park boat landing5/27/20109/26/2012MapData
1377100Petenwell Lake293148Petenwell Flowage - 3 Mi Abv Dam6/3/19986/17/1998MapData
1377100Petenwell Lake013154Petenwell Flowage - Sed Mid T19nr05e185/27/20109/26/2012MapData
1377100Petenwell Lake013004Wisconsin River Petenwell Flowage - Off Wilderness Park8/14/19752/24/1993MapData
1377100Petenwell Lake10031205Petenwell Flowage - NW of Petenwell County Park5/27/20109/26/2012MapData
1377100Petenwell Lake293146Petenwell Flowage - 1 Mi Blw Yellow Bk6/17/19986/17/1998MapData
1377100Petenwell Lake10017505Petenwell Lake / Wisconsin River -- Access off Badger Court9/17/20115/31/2019MapData
1377100Petenwell Lake10017917Petenwell Lake -- Access off County Hwy Z8/8/20105/19/2014MapData
1377100Petenwell Lake234Wisconsin River - Upper Petenwell5/11/19709/2/2003MapData
1377100Petenwell Lake013001Wisconsin River at Petenwell Dam1/10/19618/1/2024MapData
1377100Petenwell Lake10017496Petenwell Lake - Wisconsin River -- Barnum Bay8/3/20098/19/2023MapData
1377100Petenwell Lake10031197Upper Petenwell Flowage - SW of Duck Island5/27/20108/29/2012MapData
1377100Petenwell Lake013019Wisconsin River - Near Violet Lawn School2/26/19792/27/1979MapData
1377100Petenwell Lake013020Wisconsin River - Near Monroe Park8/17/19758/17/1975MapData
1377100Petenwell Lake293140Petenwell Flowage at Barnum Bay8/6/20098/6/2009MapData
1377100Petenwell Lake10031210Petenwell Flowage - 2.2 mi. NE of dam5/26/20109/26/2012MapData
1377100Petenwell Lake013170Petenwell Flowage - 1 Mi Se Halls Pt6/3/19986/3/1998MapData
1377100Petenwell Lake293149Petenwell Flowage - 2 Mi Abv Dam5/26/20109/26/2012MapData
1377100Petenwell Lake10017927Wisconsin River - Pentenwell Lake -- Access5/31/20195/6/2024MapData
1377100Petenwell Lake013005Wisconsin River at Petenwell Dam8/6/19752/9/1978MapData
1377100Petenwell Lake10033596Petenwell Lake- Boat walkway south of southern boat ramp at The Lure8/31/20128/31/2012MapData
1377100Petenwell Lake013017Wisconsin River at New Rome6/30/19777/23/1981MapData
1377100Petenwell Lake293147Petenwell Flowage at Halls Point6/3/19989/9/2015MapData
1377100Petenwell Lake10031201Petenwell Flowage - Barnum Bay 5/27/20108/31/2012MapData
1377100Petenwell Lake013002Wisconsin River Upper Petenwell Flowage - Near Yellow Banks Of Juneau County 4th St. EastMapData
1377100Petenwell Lake10001322Petenwell Lake9/1/19929/30/2017MapData
1377100Petenwell Lake10051455Harmful Bluegreen Algae Sampling8/23/20188/23/2018MapData
1377100Petenwell Lake10037676Petenwell Flowage -- Barnum Bay Marina Private Access6/22/20127/14/2012MapData
1377100Petenwell Lake10017928Petenwell Lake - 20th Drive Access - Wisconsin River Power Company (WRPCO) 7/5/20109/2/2013MapData
1377100Petenwell Lake10021040Petenwell Flowage at Mi Above Dam Deepest Point6/3/19986/17/1998MapData
1377100Petenwell Lake10031209Petenwell Flowage - 2.2 mi. SW of Petenwell Co. Park5/26/20109/26/2012MapData

Watershed Characteristics

Petenwell Lake is located in the Lower Yellow (Juneau Co.) River watershed which is 261.05 mi². Land use in the watershed is primarily forest (43.70%), wetland (43.70%) and a mix of open (6.60%) and other uses (6.00%). This watershed has stream miles, lake acres and 65,343.09 wetland acres.

Nonpoint Source Characteristics

This watershed is ranked Low for runoff impacts on streams, Low for runoff impacts on lakes and Low for runoff impacts on groundwater and therefore has an overall rank of Low. This value can be used in ranking the watershed or individual waterbodies for grant funding under state and county programs.However, all waters are affected by diffuse pollutant sources regardless of initial water quality. Applications for specific runoff projects under state or county grant programs may be pursued. For more information, go to surface water program grants.

Natural Community

Petenwell Flowage is considered a Reservoir under the state's Natural Community Determinations.

Natural communities (stream and lake natural communities) represent model results and DNR staff valiation processes that confirm or update predicted conditions based on flow and temperature modeling from historic and current landscape features and related variables. Predicated flow and temperatures for waters are associated predicated fish assemblages (communities). Biologists evaluate the model results against current survey data to determine if the modeled results are corect and whether biological indicators show water quaity degradation. This analysis is a core component of the state's resource management framework. Wisconsin's Riverine Natural Communities.