Fisheries Lake Survey

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Name: Red Rock

Nearest Town: Eden Prairie
Primary County: Hennepin
Survey Date: 06/13/2011
Inventory Number: 27007600

Public Access Information

Ownership Type Description
City Concrete


Lake Characteristics

Lake Area (acres): 96.91
Littoral Area (acres): 91
Maximum Depth (ft): 16
Water Clarity (ft): 15

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


Did you know? There are 15,000 miles of fishable streams in Minnesota, including 2,600 miles of trout streams.

Fish Sampled for the 2011 Survey Year

Species

Gear Used

Number of fish per net

Average Fish Weight (lbs)

Normal Range (lbs)

Caught

Normal Range

Black Bullhead Gill net 0.50 9.6 - 91.4 1.40 0.2 - 0.5
Black Crappie Gill net 1.00 1.5 - 14.7 0.14 0.1 - 0.3
Bluegill Trap net 6.67 1.9 - 29.5 0.17 0.2 - 0.3
Gill net 4.50 N/A 0.21 N/A
Green Sunfish Trap net 0.22 0.2 - 2.0 0.03 0.1 - 0.2
Hybrid Sunfish Trap net 0.67 N/A 0.35 N/A
Northern Pike Trap net 0.11 N/A 6.33 N/A
Gill net 6.50 1.5 - 7.0 3.27 1.5 - 3.4
Pumpkinseed Trap net 2.89 0.8 - 8.4 0.21 0.1 - 0.2
White Sucker Gill net 0.50 0.5 - 7.4 2.56 1.0 - 2.2
Yellow Perch Gill net 34.00 3.0 - 26.5 0.17 0.1 - 0.3
Normal Ranges represent typical catches for lakes with similar physical and chemical characteristics.


Length of Selected Species (Trapnet, Gillnet) Sampled for the 2011 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 bullhead 0 0 0 1 0 0 0 0 1
black crappie 1 1 0 0 0 0 0 0 2
bluegill 36 33 0 0 0 0 0 0 69
green sunfish 2 0 0 0 0 0 0 0 2
hybrid sunfish 1 5 0 0 0 0 0 0 6
northern pike 0 0 0 0 0 8 4 0 14
pumpkinseed 13 13 0 0 0 0 0 0 26
white sucker 0 0 0 0 1 0 0 0 1
yellow perch 8 56 1 0 0 0 0 0 68


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
2011 Black Crappie adults 20 9.1
  Bluegill adults 200 54.0

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
RED ROCK
Hennepin Co., 27007600
Bluegill Sunfish All sizes        
Bullhead   All sizes     Mercury
Crappie   All sizes     PFOS
Largemouth Bass   All sizes     PFOS
Northern Pike     All sizes   Mercury
Yellow Perch All sizes        

General Population

LAKE NAME
County, DOWID
Species Meal Advice Contaminants
Unrestricted 1 meal/week 1 meal/month Do not eat
RED ROCK
Hennepin Co., 27007600
Bluegill Sunfish All sizes        
Bullhead All sizes        
Crappie   All sizes     PFOS
Largemouth Bass   All sizes     PFOS
Northern Pike   All sizes     Mercury
Yellow Perch All sizes        

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 06/13/2011)

Red Rock Lake is a 92 acre lake with a maximum depth of 16 feet, located in Eden Prairie. The lake provides some recreational opportunities. A city park and a boat launch are present. Parking is plentiful. A city ordinance restricts the size of motors in use on the lake to 10 horsepower. Water quality in Red Rock Lake is fair, compared to other West Metro lakes. By early summer most species of fish cannot inhabit water deeper than 14 feet for extended periods of time. Anglers should keep this in mind when pursuing northern pike and crappie. Fishing in water deeper than 12 feet in mid to late summer could yield very few fish. Boaters should also keep in mind that new state laws require the drain plug be removed while traveling on public roadways.

The predator community in Red Rock Lake reflects a natural state. Northern pike and largemouth bass are present. Northern pike numbers were low compared to historic averages for Red Rock Lake. Average length was 24.5 inches. In the 2011 population assessment no largemouth bass were sampled. This is due in part to a severe winterkill that occurred during the summer of 2010-2011. The two aeration systems failed. Numerous deceased largemouth bass were observed after ice-out. A winterkill assessment showed sufficient numbers remained to repopulate the lake.

Six species of panfish are present in Red Rock Lake. Black crappie abundance is very low. Only two fish were sampled. Adult black crappie were restocked in the spring of 2011. Bluegill abundance decreased compared to the 2005 survey, but stayed within the historic average range. Abundance and mean weight are below average compared to similar lakes. Nearly 50% of sampled bluegill measured at least 6 inches. Yellow perch abundance in Red Rock Lake increased. The 2011 measure of abundance is high compared to other lakes. Mean weight of yellow perch was below average. Average length was 6.9 inches. Pumpkinseed were sampled at a below average abundance. Hybrid sunfish were also sampled.

Rough fish are present in very low numbers. No common carp were sampled in the 2011 survey. Black bullhead abundance fell to an all-time low for Red Rock Lake. White sucker were also sampled in low numbers.

Anglers can help the fishery recover from the winterkill by practicing selective harvest. Harvesting large fish reduces the biological incentive to grow large. Larger fish compete for spawning habitat and food more effectively. Thus, fish have more incentive to grow large if large fish are present in a lake. Harvesting smaller fish preserves spawning stock and increases the biological incentive to grow large which promotes big fish genetics. Harvesting smaller black crappie, bluegill and largemouth bass would aid the repopulation of Red Rock Lake.


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 C1341 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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