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BROCK LAKE


Lake Information

County: Tazewell

Acreage: 10

Shoreline Length: 0.6 miles

Recreational Amenities

Boat Fishing? Electric Motors only

Boat Ramps? Yes

Boat Rental? No

Skiing? No

Swimming? No

Picnicking? Yes

Camping? No


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There are no zebra mussels in this lake.


Fish Stocking

Year

Species

Size

Count

2021

Redear Sunfish

Fingerling 1 - 3"

5328


Additional information for stocking on Brock Lake


Species

Rank

Fish Status

BLACK CRAPPIE

Good

The current crappie population is primarily made up of individuals ranging from 9 - 11 inches in good body condition.

BLUEGILL

Good

The bluegill population was sampled by 27 fish in the 2021 spring electrofishing survey. They ranged in size from 1 to 8 inches in length with an average body condition rating of 104. The current bluegill population is rated as very good. A future improvement in the bass population size structure as well as some aquatic vegetation management would help maintain this good bluegill size structure.

CHANNEL CATFISH

Good

While no channel catfish were collected in 2021, a good population has existed historically. IDNR has added Brock Lake to the channel catfish stocking schedule and the first batch of 8-10” catfish were stocked in August 2020.

LARGEMOUTH BASS

Developing

In 2021, the largemouth bass population was evaluated by 49 bass collected by Pulsed-DC electrofishing. The largemouth bass population continues to be defined by a high percentage of fish from 5 – 12 inches with a body condition of 85. We did not collect any bass over 13 inches despite a June 2020 stocking of adult fish. This stocking was a group of 75 brood bass that were being retired from Jake Wolf Fish Hatchery. With an average size of 4lbs these fish should provide some great fishing action as well as introduce a larger size class of bass that previously did not exist in the lake. The collection rate was 147/hr which indicates a high density. At this time the current bass population could use thinning of bass that are under 12 inches in length. The majority of the current bass population is under approximately 12 inches in length and growing slowly. This is due to a very high density of bass all competing for the same food resources

REDEAR SUNFISH

Developing

An initial stocking of redear sunfish occurred in October of 2021. The high density of snails in the lake (a favorite food item of redear) should lead to a good fishery in the near future.

Location: Brock Lake is located 1.2 miles west of Mackinaw, IL at 29550 E. Hoffman Rd. Mackinaw, IL 61755. The lake is the property of the Village of Mackinaw.

Description: Brock lake is 10 acres in size. Approx. 0.3 miles of shoreline is accessible to bank fisherman. This lake was enrolled into a fisheries Co-Op agreement with IDNR in 2019.

Additional Lake Information: All fish 2 Pole and line fishing only.
Electric Motors only

Site Regulations:

Largemouth Bass: 3 fish daily with only 2 being 12" or smaller and 1 being 15" or greater
Bluegill/Redear Sunfish: 25 fish daily
Channel Catfish: 3 fish daily

Contact Information:
Village of Mackinaw
309- 359-5821
IDNR Fisheries Biologist: Blake Bushman
309- 435-1010