Fish Iowa - Lakes, Ponds, and Reservoirs

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About Hannen Lake

Surface Area (acres): 38.00
Maximum Depth (feet): 20.9 ft. (2012)
Motoring Restrictions: Electric motors only
See below for additional location-specific regulations

Location

County: Benton
Description: Constructed lake
Coordinates: 41.86615685, -92.11354515

Nearby Parks

- No results found

Amenities

Amenities at Hannen Lake include:

Boat Access
Fishing Jetty
Accessible Pier
Picnic Area
Beach
Trails
Accessible Facilities
Playground
Restrooms
Camping
Good/Excellent Shorefishing
Hard Surface Boat Ramp
Accessible Shoreline

What to Fish For

Fishing Report

- No recent updates found

Popular Fish Species

Fishing Forecast

Bluegill numbers are moderate with all sizes up to 8-inches; the majority of the fish sampled were 5- to 6-inches. Crappie numbers are fair with most fish 10- to 11-inches. Largemouth bass numbers are good with many 13- to 18-inch fish.(2015)

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

Printable Map (PDF)

Explore the full Fishing Atlas

Stocking and Management

Stocking

09/14/2021 - 682 Channel Catfish (8.8)
09/23/2019 - 685 Channel Catfish (9.4)
09/05/2019 - 16,124 Redear Sunfish (1.4)
09/17/2018 - 683 Channel Catfish (8.4)
10/21/16 - 15 Redear Sunfish (Adult)
10/21/16 - 1,900 Redear Sunfish (Fingerling)
10/10/16 - 685 Channel Catfish (9.3")

Management

2021 - Vegetation-Treatment: Under the ice whole lake treatment utilizing systemic herbicide Sonar(A.S.) to control curlyleaf pondweed
2021 - Vegetation-Treatment: Under the ice whole lake treatment utilizing system herbicide Sonar (A.S.) to control curlyleaf pondweed.
2020 - Vegetation-Treatment: Under the ice whole lake treatment for curly leaf pondweed control utilizing systemic herbicide Sonar (A.S.)
2020 - Vegetation-Treatment: Under the ice whole lake treatment for curly leaf pondweed control utilizing systemic herbicide Sonar (A.S.)
2019 - Vegetation-Treatment: Whole lake treatment using Sonar (A.S.) under the ice for curly leaf pondweed control. Initial concentration of 10 ppb for this treatment.
2018 - Vegetation-Treatment: Brittle naiad management treatment using diquat in treatment zone.
2017 - Vegetation-Treatment: Spot treatment of brittle naiad based on 2017 brittle naiad management plan.
2016 - Vegetation-Treatment: Spot treatment of brittle naiad with Reward at 2 gal/acre subsurface application
2013 - Vegetation-Treatment: Sonar was applied in June as an entire lake treatment to control brittle naiad.
2012 - Watershed-Activities: A watershed meeting was conducted with the Benton County Conservation Board to discuss procedures on how the Lake Restoration Program applies to Hannen Lake. A lake assessment will be completed this winter and we will meet again after that to develo
2012 - Fishery Renovation-Chemical-Rotenone: Rotenone was applied at a rate of 0.10 ppm to Hannen Lake (Benton County) to control gizzard shad. Three boats applied 18.86 gallons of rotenone over a four hour period. Gizzard shad were first discovered in the lake in 2011 and we wanted to be pro
2012 - Vegetation-Treatment: Sonar was applied in June as an entire lake treatment to control brittle naiad.
2012 - Watershed-Activities: A watershed meeting was conducted with the Benton County Conservation Board to discuss procedures on how the Lake Restoration Program applies to Hannen Lake.
2011 - Survey-Population: Gizzard shad were collected during an electrofishing survey.

Regulations and Who to Talk To

Motoring Restrictions

Motoring Restrictions: Electric motors only

Contacts for this Location

Ron Lane, Conservation Officer; 319-350-2871; Ron.Lane@dnr.iowa.gov
Chris Mack, Fisheries Biologist; 3193508093; chris.mack@dnr.iowa.gov
Brett Reece, Conservation Officer; 641-751-0931; Brett.Reece@dnr.iowa.gov

Fishing Regulations

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:

Fish Iowa - Lakes, Ponds, and Reservoirs - Hannen Lake