Fish Iowa - Lakes, Ponds, and Reservoirs

Lakes, Ponds, and Reservoirs DNR Homepage

About Grundy County Lake

Surface Area (acres): 40.00
Maximum Depth (feet): 30 ft. (2000 - Max depth, as constructed.)
Motoring Restrictions: No wake
See below for additional location-specific regulations

Location

County: Grundy
Description: Surface mine lake
Coordinates: 42.45986382, -92.63752935

Nearby Parks

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Amenities

Amenities at Grundy County Lake include:

Boat Access
Fishing Jetty
Accessible Pier
Picnic Area
Beach
Trails
Accessible Facilities
Playground
Restrooms
Camping
Hard Surface Boat Ramp
Community Fishing Location

What to Fish For

Fishing Report

Please contact the local fisheries management biologist for current information.

Fishing Summary

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Popular Fish Species

Consumption Guidelines

Iowa-Caught Fish Are Safe to Eat, In Almost All Cases

In nearly all cases, Iowa fish are safe to eat. Cleaning and/or preparing the meal causes most of the problems regarding taste or color of fish. Like all living creatures, fish are susceptible to diseases, parasites, and other naturally occurring conditions in the water. If you suspect your fish is affected by any of these conditions, do not eat it. Consider eating smaller and younger fish which usually have lower levels of contaminants than larger ones. Most contaminants accumulate in larger, older fish. For additional information, check out our resources for eating and cooking Iowa caught fish.

To learn more about fish tissue monitoring, visit our Fish Tissue Monitoring page .

Where to Go

Explore the full Fishing Atlas

Stocking and Management

Stocking

9/12 & 10/2/23 2023 - 1,439 Channel Catfish (7.8)
09/22/2021 - 720 Channel Catfish (9.4)
09/11/2019 - 722 Channel Catfish (8.7)
09/21/2018 - 720 Channel Catfish (8.1)
9/12/16 - 721 Channel Catfish (8.9")
10/21/16 - 2,000 Redear Sunfish (Fingerling)

Management

2025 - Vegetation-Treatment: Control curly leaf and native plants for access and water quality.
2025 - Stocking-Walleye: 513 5-7" Walleye stocked by CVWC
2025 - Vegetation-Treatment: Control curly leaf pondweed for water quality and access.
2024 - Vegetation-Treatment: Brittle naiad control with herbicide provided using MFT funds and a private applicator applied.
2023 - Vegetation-Treatment: Brittle naiad management using diquat and Cide Kick II as described in the management plan.
2023 - Stocking-Walleye: 515 5-7" Walleye stocked by CVWC
2022 - Stocking-Walleye: 517 5-7" Walleye stocked by CVWC
2022 - Vegetation-Treatment: Aquatic Control applied Reward and Cide Kick II in determined management zones for NAMI control.
2021 - Vegetation-Treatment: Spot treatment for brittle naiad control. Aquatic Control applied the herbicide as determined in management plan.
2021 - Stocking-Walleye: 584 5-7" Walleye stocked by CVWC
2020 - Vegetation-Treatment: High use areas treated to reduce the risk of brittle naiad spread. Used Reward at 2 gal/acre as directed by label.
2020 - Stocking-Walleye: 350 5-7" Walleye stocked by CVWC
2019 - Vegetation-Treatment: Aquatic Control applied herbicide for brittle naiad control in identified zones in the vegetation management plan.
2018 - Vegetation-Treatment: Brittle naiad management using diquat applied to treatment zones.
2018 - Vegetation-Treatment: Brittle naiad management using diquat in treatment zones.
2017 - Vegetation-Treatment: Brittle naiad management based on 2017 management plans. Treatment using Reward herbicide at 2 gallons/acre applied subsurface.
2016 - Vegetation-Treatment: Spot treated brittle naiad at 2 gal/acre subsurface application with Tribune. Couldn't treat SW jetty due to anglers.
2015 - Vegetation-Treatment: Spot treated Brittle Naiad with Reward around the boat ramp and fishing jetties.
2014 - Vegetation-Treatment: Spot treated brittle naiad with Reward around the boat ramp and fishing jetties.
2013 - Vegetation-Treatment: Sonar was applied in June as an entire lake treatment to control brittle naiad.
2012 - Vegetation-Treatment: Sonar was applied in June as an entire lake treatment to control brittle naiad.

Regulations and Who to Talk To

Motoring Restrictions

Motoring Restrictions: No wake

Contacts for this Location

Austin Dollen, Conservation Officer (Grundy); 641-751-5246; Austin.Dollen@dnr.iowa.gov
Chris Mack, Fisheries Biologist; 3193508093; chris.mack@dnr.iowa.gov

Fishing Regulations

The summaries listed below are a partial listing provided for your benefit. Familiarize yourself with the complete Fishing Regulations here: Iowa DNR Fishing Regulations and Laws.

Black Crappie

Season: Continuous
Daily Bag Limit: combined black and white crappie, 25 fish
Possession Limit: unlimited
Length Limit: none
Other: No daily limit on private waters

Bluegill

Season: Continuous
Daily Bag Limit: 25 fish
Possession Limit: unlimited
Length Limit: none
Other: No daily limit on private waters

Channel Catfish

Season: Continuous
Daily Bag Limit: combined: channel, blue and flathead catfish, 8 fish
Possession Limit: combined: channel, blue and flathead catfish, 30 fish
Length Limit: none
Other:

Largemouth Bass

Season: Continuous
Daily Bag Limit: combined black bass, 3 fish
Possession Limit: combined black bass, 6 fish
Length Limit: 15-inch minimum
Other:

Walleye

Season: Continuous
Daily Bag Limit: combined walleye, sauger and saugeye; 5 fish
Possession Limit: combined walleye, sauger and saugeye; 10 fish
Length Limit: none
Other:

Yellow Perch

Season: Continuous
Daily Bag Limit: 25 fish
Possession Limit: 50 fish
Length Limit: none
Other:

Fish Iowa - Lakes, Ponds, and Reservoirs - Grundy County Lake