Lake information report

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Name: Independence

Nearest Town: Maple Plain
Primary County: Hennepin
Survey Date: 07/26/2010
Inventory Number: 27017600
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Public Access Information

Ownership Type Description
Watershed District Concrete Located in Three Rivers Park District- Baker Park Reserve on southeast side of lake.


Lake Characteristics

Lake Area (acres): 832
Littoral Area (acres): 425
Maximum Depth (ft): 58
Water Clarity (ft): 3.6 (2.75-4.5)

Dominant Bottom Substrate: N/A
Abundance of Aquatic Plants: N/A
Maximum Depth of Plant Growth (ft): N/A


Did you know? Minnesota has 11,482 lakes 10 acres or larger, of which 5,483 are fishing lakes. Excluding Lake Superior, the state has 3.8 million acres of fishing water. Minnesota's portion of Lake Superior is 1.4 million acres.

Fish Sampled for the 2010 Survey Year

Species

Gear Used

Number of fish per net

Average Fish Weight (lbs)

Normal Range (lbs)

Caught

Normal Range

Black Crappie Trap net 9.08 1.8 - 21.2 0.25 0.2 - 0.3
Gill net 14.50 2.5 - 16.5 0.25 0.1 - 0.3
Bluegill Trap net 66.17 7.5 - 62.5 0.17 0.1 - 0.3
Gill net 29.83 N/A 0.17 N/A
Bowfin (dogfish) Trap net 0.50 0.4 - 1.3 6.84 2.3 - 4.1
Common Carp Trap net 0.58 0.4 - 2.0 7.18 2.6 - 6.0
Gill net 0.58 0.3 - 3.0 7.27 1.9 - 5.2
Golden Shiner Trap net 0.17 0.2 - 0.8 0.05 0.1 - 0.1
Gill net 0.42 0.3 - 1.5 0.11 0.1 - 0.1
Green Sunfish Trap net 0.33 0.2 - 1.3 0.06 0.1 - 0.2
Hybrid Sunfish Trap net 2.17 N/A 0.15 N/A
Gill net 0.33 N/A 0.19 N/A
Largemouth Bass Trap net 0.50 0.2 - 0.7 1.40 0.2 - 0.9
Gill net 0.25 0.3 - 0.8 0.77 0.4 - 1.0
Muskellunge Gill net 0.58 0.2 - 1.0 21.47 1.9 - 4.0
Northern Pike Trap net 0.17 N/A 1.77 N/A
Gill net 1.33 1.5 - 7.3 5.48 2.0 - 3.5
Pumpkinseed Trap net 5.17 0.7 - 4.2 0.12 0.1 - 0.2
Gill net 6.50 N/A 0.13 N/A
Walleye Trap net 0.33 0.3 - 1.2 1.37 0.8 - 2.8
Gill net 5.08 1.2 - 6.3 1.95 1.2 - 2.7
White Sucker Gill net 0.42 0.4 - 2.2 0.67 1.5 - 2.4
Yellow Bullhead Trap net 0.08 0.9 - 5.7 0.71 0.5 - 0.8
Yellow Perch Trap net 1.00 0.3 - 1.7 0.26 0.1 - 0.2
Gill net 39.25 2.0 - 27.9 0.14 0.1 - 0.2
Normal Ranges represent typical catches for lakes with similar physical and chemical characteristics.


Length of Selected Species (Trapnet, Gillnet) Sampled for the 2010 Survey Year

Species Number of fish caught in each category (inches)
0-5 6-8 9-11 12-14 15-19 20-24 25-29 30+ Total
black crappie 3 277 3 0 0 0 0 0 283
bluegill 410 739 0 0 0 0 0 0 1152
bowfin (dogfish) 0 0 0 0 0 1 5 0 6
common carp 1 0 0 0 2 6 5 0 14
golden shiner 3 4 0 0 0 0 0 0 7
green sunfish 4 0 0 0 0 0 0 0 4
hybrid sunfish 21 9 0 0 0 0 0 0 30
largemouth bass 0 1 3 3 2 0 0 0 9
muskellunge 0 0 0 0 0 1 0 6 7
northern pike 0 0 0 0 1 5 7 5 18
pumpkinseed 136 4 0 0 0 0 0 0 140
walleye 0 9 4 32 3 6 10 0 65
white sucker 0 3 0 1 1 0 0 0 5
yellow bullhead 0 0 1 0 0 0 0 0 1
yellow perch 33 437 6 0 0 0 0 0 483


For the record, the largest Northern Hogsucker taken in Minnesota weighed 1 lb., 15 oz. and was caught:

    Where: Sunrise River near Sunrise, Chisago County
    When: 8/16/82
    Statistics: 14.25" length, 7.1" girth

Fish Stocking Activity

Fish Stocked by Species for the Last Ten Years

Year Species Size Number Pounds
2013 Muskellunge* yearlings 250 83.0
  Walleye fingerlings 10,579 455.0
  Walleye fingerlings 17,516 496.0
2012 Muskellunge* fingerlings 95 14.3
  Muskellunge* yearlings 263 37.0
2011 Walleye fingerlings 26,236 937.0
2010 Muskellunge fingerlings 1,001 195.2
2009 Walleye adults 48 43.0
  Walleye fingerlings 12,003 527.6
  Walleye fingerlings 3,951 149.5
  Walleye fingerlings 912 101.0
  Walleye yearlings 70 19.0
  Walleye yearlings 4 4.0
2008 Muskellunge fingerlings 485 118.3
  Muskellunge* fingerlings 600 120.7
2007 Walleye fingerlings 6,599 622.4
2006 Muskellunge* fingerlings 1,000 234.2
  Walleye yearlings 25 7.8
  Walleye adults 343 163.8
  Walleye fingerlings 691 86.0
2005 Walleye fingerlings 13,694 545.4
2004 Muskellunge* fingerlings 1,002 233.0

Privately Stocked Fish
* indicates privately stocked fish. Private stocking includes fish purchased by the DNR for stocking and fish purchased and stocked by private citizens and sporting groups.

Stocking Fish Sizes
Fry - Newly hatched fish that are ready to be stocked usually called "swim-ups". Walleye fry are 1/3 of an inch or around 8 mm.
Fingerling - Fingerlings are one to six months old and can range from a size of one to twelve inches depending on the species. Walleye fingerlings range from three to eight inches each fall.
Yearling - Yearling fish are at least one year old. A one-year-old fish can range from three to twenty inches depending on the species. Walleye yearlings average from six to twelve inches.
Adult - Adult fish are fish that have reached maturity. Depending on the species, maturity can be reached at two years of age. Walleye reach maturity between the ages of four and six years.

Fish Consumption Guidelines

These fish consumption guidelines help people make choices about which fish to eat and how often. Following the guidelin es enables people to reduce their exposure to contaminants while still enjoying the many benefits from fish.

Pregnant Women, Women who may become pregnant and Children under age 15

LAKE NAME
County, DOWID
Species Meal Advice Contaminants
Unrestricted 1 meal/week 1 meal/month Do not eat
INDEPENDENCE
Hennepin Co., 27017600
Bluegill Sunfish   All sizes     Mercury
Carp   All sizes     Mercury
Crappie   All sizes     Mercury
Northern Pike   shorter than 27" 27" or longer   Mercury
Walleye   shorter than 19" 19" or longer   Mercury

General Population

LAKE NAME
County, DOWID
Species Meal Advice Contaminants
Unrestricted 1 meal/week 1 meal/month Do not eat
INDEPENDENCE
Hennepin Co., 27017600
Bluegill Sunfish All sizes        
Carp All sizes        
Crappie All sizes        
Northern Pike   All sizes     Mercury
Walleye   All sizes     Mercury

DOWID - MN DNR, Division of Waters' lake ID number.

Contaminants listed were measured at levels that trigger advice to limit consumption.

Listing of consumption guidelines do not imply the fish are legal to keep, MN DNR fishing regulations should be consulted.

Dioxin
Mercury
PCBS - Polychlorinated biphenyls
PFOS - Perfluorooctane sulfanate


Status of the Fishery (as of 07/26/2010)

Lake Independence is an 844-acre lake located in western Hennepin County in the city of Maple Plain. Baker Park Reserve (Three Rivers Park District) borders the southeast portion of the lake and provides a two-lane concrete boat access. Lake Independence offers a diverse sportfish community consisting of black crappie, bluegill, largemouth bass, muskellunge, pumpkinseed, northern pike, walleye, and yellow perch. Since 1999, management plan goals include stocking walleye at 2.0 lb/littoral acre (850 lb) in odd-numbered years while stocking 1000 muskellunge in even-numbered years. A population assessment was conducted, starting in late July 2010, to determine the species composition and abundance of fish in the lake.

Water quality in Lake Independence has been declining in recent years. Three Rivers Park District has been monitoring the water quality and nutrient loading within the lake. Watershed development and the numerous hobby farms within the watershed are suspected to be the source of nutrient input into Lake Independence. Dissolved oxygen levels fell below 2 ppm at 16 ft in 2010, despite the lake's maximum depth of 58 feet.

Walleye abundance (5.1/gill net) is moderately high compared to other similar lakes in the state. However, gill-net catch is below the long-term average (past 7 assessments) of 10.7/net, and is the lowest on record since 1984. Average length and weight were 15.5 inches and 1.95 pounds, with the longest measuring 29.1 inches. Thirty percent were 15 inches or longer, 25% were 20 inches or longer, and 16% were 25 inches or longer. The walleye population is supported by the strong 2007 year class that comprised 50% of the catch. The next strongest year class was in 2009 which comprised 18% of the catch. These 1 and 3 year old fish dominated the sample and should grow into desirable sizes in next 2 to 3 years. Walleye averaged 15 inches by age 4 and 21 inches by age 5.

Black crappie abundance is lower than some of the previous assessments; however, catch was still moderately high in gill nets (14.5/net) and moderate in trap nets (9.1/net) compared to other similar lakes in the state. Mean length and weight of black crappie from both gear types was 7.8 inches and 0.24 pounds. Thirty-four percent were 8 inches or longer and the longest measured 9.5 inches. Ages ranged from 1 through 6. The largest year class was 2004, which comprised 53% of the sample. Black crappie averaged 8 inches by age 4.

Bluegill abundance is high (66.2/trap net) and size is moderate (mean = 0.17 pounds) compared with other similar lakes in the state. Trap net catch is near the long-term average (49.5/net over previous 7 assessments), although is less than half that observed in the last assessment in 2007 (134.6/trap net). Mean length of bluegill in trap nets was 6.0 inches. Sixty-nine percent were 6 inches or longer and the longest measured 7.1 inches. Ages ranged from 2 to 6. The largest year class was 2008, which comprised 42% of the sample. Bluegill averaged 6 inches by age 4.

Northern pike abundance has historically been low in Lake Independence, averaging 2.2/gill net over the previous 7 assessments. In 2010, 1.3/gill net were sampled, which is considered low compared to other similar lakes in the state. Alternatively, size structure is good. Ninety-four percent were 21 inches or longer, 50% were 28 inches or longer, and 19% were 34 inches or longer. Ages 2 through 9 were represented, with the 2007 year class (44%) being the most abundant. Northern pike reached 21 inches by age 3 and 28 inches by age 4.

Nine largemouth bass were collected during the assessment; however, passive sampling gears, such as trap nets and gill nets, are not effective methods for collecting largemouth bass. The data presented for this species is not indicative of relative abundance. Electrofishing is the typical method for largemouth bass assessments but was not conducted during this survey. Mean size was 12.3 inches and 1.2 pounds with the largest reaching 16.1 inches and 2.7 lbs. Fifty-six percent were 12 inches and longer and 22% were 15 inches and longer.

Yellow perch are abundant. Gill net catch was high (39.3/net) compared to other similar lakes in the state. Yellow perch gill net catch has historically remained relatively stable. Current yellow perch numbers are similar to the mean over the previous 7 assessments (40.2/gill net). Mean length and weight were 6.9 inches and 0.14 pounds. Ten percent were 8 inches or longer and the longest measured 9.1 inches. Ages 2 through 6 were represented, with the 2007 year class (56%) being the most abundant. Yellow perch reached 8 inches by age 5.

Spring ice-out trap netting is used to index adult muskellunge abundance but this was not conducted in this assessment, so the data presented for this species is not indicative of relative abundance. However, 7 muskellunge were sampled ranging from 22.6 to 47.6 inches. Lake Independence is a popular muskellunge fishery in the western metro area.

In an assessment of the shallow, nearshore fish community, backpack electrofishing and seining were conducted at two different times throughout the summer. The most abundant species observed were bluegill and bluntnose minnow. Additionally, black bullhead, yellow bullhead, green sunfish, largemouth bass, pumpkinseed, yellow perch, black crappie, hybrid sunfish, walleye, golden shiner, spotfin shiner, fathead minnow, Iowa darter, and Johnny darter were observed. An Index of Biotic Integrity (IBI) was estimated based on all fish sampled in this assessment. The absence of sensitive species contributed to low IBI scores of 68.1 and 83.8, indicating water quality and habitat may be impaired.

Other species sampled in low abundance were common carp and white sucker.


For more information on this lake, contact:

Area Fisheries Supervisor
7050 E Hwy 101, Suite 100
Shakopee, MN 55379
Phone: (952) 496-4141
Internet: West Metro Fisheries
E-Mail: MetroWest.Fisheries@state.mn.us

Lake maps can be obtained from:

Minnesota Bookstore
660 Olive Street
St. Paul, MN 55155
(651) 297-3000 or (800) 657-3757
To order, use B0031 for the map-id.


For general DNR Information, contact:

DNR Information Center
500 Lafayette Road
St. Paul, MN 55155-4040
TDD: (651) 296-6157 or (888) MINNDNR
Internet: www.dnr.state.mn.us
E-Mail: info.dnr@state.mn.us

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