Fisheries Lake Survey

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Name: Divide (Twohey)

Nearest Town: Isabella
Primary County: Lake
Survey Date: 06/13/2011
Inventory Number: 38025600

Public Access Information

Ownership Type Description
US Forest Service Carry-In Many access points off of USFS forest road #172 along the north shore
US Forest Service Carry-In 50 ft. down hill from parking area on north shore.
US Forest Service Carry-In Access from USFS campground on the north side of the lake.

Lake Characteristics

Lake Area (acres): 61.11
Littoral Area (acres): 36.7
Maximum Depth (ft): 22
Water Clarity (ft): 11.7 (9.5-15)

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

Did you know? The DNR Section of Fisheries has a full-time staff of 285. There are 4 regional and 28 area fisheries offices.

Fish Sampled for the 2011 Survey Year


Gear Used

Number of fish per net

Average Fish Weight (lbs)

Normal Range (lbs)


Normal Range

Golden Shiner Trap net 19.40 N/A 0.08 N/A
Gill net 5.00 N/A 0.10 N/A
Rainbow Trout Trap net 1.10 N/A 0.26 N/A
Gill net 8.67 N/A 0.33 N/A
Splake Trap net 2.10 N/A 0.11 N/A
Gill net 24.67 N/A 0.68 N/A
White Sucker Trap net 0.10 0.5 - 3.4 2.76 0.8 - 1.6
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
golden shiner 121 86 0 0 0 0 0 0 209
rainbow trout 0 12 23 2 0 0 0 0 37
splake 1 46 13 29 6 0 0 0 95
white sucker 0 0 0 0 1 0 0 0 1

For the record, the largest Tiger Muskellunge taken in Minnesota weighed 34 lbs., 12 oz. and was caught:

    Where: Lake Elmo, Washington County
    When: 7/7/99
    Statistics: 51" length, 22.5" girth

Fish Stocking Activity

Fish Stocked by Species for the Last Ten Years

Year Species Size Number Pounds
2015 Rainbow Trout yearlings 1,995 730.8
  Splake fingerlings 3,000 73.0
2014 rainbow trout yearlings 1,999 713.9
  splake fingerlings 2,900 69.4
2013 Rainbow Trout yearlings 2,019 612.0
  Splake fingerlings 2,535 63.0
2012 Rainbow Trout yearlings 1,965 642.1
  Splake fingerlings 2,998 91.7
2011 Rainbow Trout yearlings 1,984 493.4
  Splake fingerlings 3,010 109.5
2010 Rainbow Trout yearlings 2,004 167.0
  Splake fingerlings 4,003 113.7
2009 Rainbow Trout yearlings 2,001 772.4
  Splake fingerlings 4,078 126.7
2008 Rainbow Trout yearlings 1,998 711.1
  Splake fingerlings 3,933 117.0
2007 Rainbow Trout yearlings 2,001 714.7
  Splake fingerlings 2,985 112.6
2006 Rainbow Trout yearlings 2,000 775.2
  Splake fingerlings 3,981 119.3

Stocking Notes
1 - indicates fish purchased and stocked by private citizens and sporting groups.
2 - indicates fish purchased by the DNR for stocking.

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 guidelines 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

County, DOWID
Species Meal Advice Contaminants
Unrestricted 1 meal/week 1 meal/month Do not eat
Lake Co., 38025600
Rainbow Trout   All sizes     Mercury
Splake   All sizes     Mercury

General Population

County, DOWID
Species Meal Advice Contaminants
Unrestricted 1 meal/week 1 meal/month Do not eat
Lake Co., 38025600
Rainbow Trout All sizes        
Splake 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.

PCBS - Polychlorinated biphenyls
PFOS - Perfluorooctane sulfanate

Status of the Fishery (as of 06/13/2011)

Divide Lake is 61 acres with 60% littoral area, having a maximum depth of 22 feet. Located 4.9 miles east of Isabella, MN on USFS Rd #172 (Dumbbell Lake Road), there are three sites at the USFS campground (fee) with drinking water, outhouse and garbage pickup and a carry-down access to the lake. A second access has a parking area for two or three vehicles, on the north shore of the lake, then a 50 foot walk down hill to the lake. Designated Stream Trout Lake signs are posted near each of the accesses.

Divide Lake is one of the more popular managed stream trout lakes in the Finland Management Area and gets moderate fishing pressure in the summer and winter angling seasons. Splake fingerlings are stocked annually in the fall and rainbow trout yearlings are stocked annually in the spring.

Splake numbers in Divide Lake were above average for the Finland Area and similar to catches in previous investigations. The average length of the catch was 10.3 inches (0.6 pound); the largest splake sampled was 17.8 inches (2.6 pounds). Slightly more than 50% of the fish sampled in 2011 were yearling splake, stocked as fingerlings in the fall of 2010, which brought down the average size of the fish in this report.

The rainbow trout sample in 2011was slightly below management goals set for Divide Lake. The average length of rainbow trout in the catch was 9.4 inches (0.3 pound), the largest rainbow trout 12.6 inches (0.75 pound). More than 50% of the rainbow trout sampled were yearlings stocked in the spring of 2011, which brought down the average size of the fish in this report. Rainbow trout populations are difficult to assess with standard sampling gear, many different methods have been tried to attain a larger sample without much success. Angling for rainbow trout is often better for the public in Divide Lake than population assessment catch rates would indicate.

For more information on this lake, contact:

Area Fisheries Supervisor
PO Box 546
6686 Hwy 1
Finland, MN 55603
Phone: (218) 353-8840
Internet: Finland Fisheries

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 C0425 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

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