Helen

Helen (Tank) Lake is located in eastern Itasca County near Goodland, MN in the St. Louis River watershed. The lake is representative of ecological lake class 32. Helen Lake has a surface area of 158 acres and a littoral area of 86 acres. The maximum depth is 32 feet and the lake has 3.8 miles of shoreline. The Sechhi disk reading was 4 feet in August of 2011 and the water color was brown due to bog stain. The MPCA lists the trophic status as mesotrophic (www.pca.state.mn.us/water). Moderate amounts of the lakeshore have been residentially developed, although much of the shoreline appeared to be undisturbed. The initial survey in 1977 described a diverse aquatic plant community with plant growth to a depth of 8 feet. The shoreline was described as primarily hardwoods with emergent vegetation dominating the shoreline. The lake has one seepage inlet on the southeast end and an inlet on the south bay that flows from Little Fowler and Dode lakes. There is one outlet which flows north to Little Island Lake. There is a public access located on the southwest end of the lake. A fisheries lake management plan (LMP) was written for Helen Lake in 2009. The LMP identified northern pike and black crappie as the primary management species and largemouth bass as the secondary management species. No special regulations exist for Helen Lake, but statewide seasons and limits apply. A population assessment was conducted on Helen Lake in 2011. Electrofishing was conducted for largemouth bass in June and test netting was conducted in August. Near shore electrofishing and seining was conducted as part of a statewide effort to produce index of biological integrity data. Electrofishing for largemouth bass produced a catch of 36 bass. Helen Lake appeared to support a quality bass population as bass ranged in length from 6.3 to 18.0 inches with an average length of 13.0 inches. Seventy-three percent of the bass exceeded the quality length of 12 inches, 20% exceeded the angler preferred length of 15. Age analysis indicated 6 year classes and fairly consistent recruitment. The growth rate was near the statewide average, as individuals typically achieved 12 inches by age 5 and nearly 15 inches by age 6. Good bass angling opportunities appear to exist given the size structure and catch rate of largemouth bass. Black crappie were the most common fish captured in the gill nets. The catch rate was high compared to lakes with similar habitats. Trap net catches of crappie were average compared to similar lakes. Size distributions were described as poor in past assessments and remained so in 2011 as only 27% of the crappie exceed 8 inches. Six year classes were present, but recruitment appeared inconsistent. Inconsistent recruitment of black crappie is a common life history trait for many populations, often resulting in "boom and bust" angling cycles. Growth was slower than the statewide average, as individuals did not typically achieve 8 inches until age 6. Slow growth and inconsistent recruitment may limit the popularity of the black crappie fishery. Northern pike were the second most common fish in the gill nets. The catch rate was within the expected range for similar lakes and similar to the previous assessment of Helen Lake. Past assessments indicated poor size structure. Northern pike were typically small, ranging from 14.7 to 26.9 inches and averaged 20.2 inches in 2011. Growth rates were near the statewide average with individuals exceeding 21 inches by age 5. Five year classes were present, but recruitment appeared inconsistent. Northern pike were relatively young, averaging 3.0 years and only 17% of the sampled pike were age 5 or older. A lack of older fish may indicate poor recruitment in the recent past, high mortality of older individuals, high angler harvest, or a combination of the factors. The popularity of the northern pike fishery is likely limited by a lack of older, larger pike. Anglers should be encouraged to release pike exceeding 22 inches to help improve size and age distributions. Bluegill were the most common fish in the trap nets, although the catch rate was low compared to similar lakes. Trap net caught bluegill ranged from 3.4 to 9.1 inches with an average length of 5.0 inches. Past assessments documented poor size structure. Size structure remained relatively poor in 2011, as only 19% exceeded 6 inches. The presence of bluegill exceeding 8 inches may indicate at least some potential for quality bluegill. Seven year classes were present and recruitment appeared relatively consistent. Bluegill averaged 5 years of age and 26% of the sampled fish were age 6 or older, suggesting good adult survival. Similar lakes typically produce abundant bluegill with poor growth and the growth rate from Helen Lake was near the lake class average as individuals typically achieved 6 inches by age 7 and 8 inches by age 9. Poor size structure and modest growth may limit the popularity of the bluegill fishery. The protection of water quality and habitat is critical in maintaining or improving fish and wildlife populations. Unfortunately, human activities often negatively impact our lakes. Fertilized turf-grass lawns and failing septic systems along with the removal of shoreline and aquatic vegetation, mowing to the shore, and installing sand blanket beaches result in destabilized shorelines, uncontrolled erosion, and increased run-off, contributing excess nutrients and sediment to the lake and degrading water quality and habitat. By understanding the cumulative impacts of our actions and taking steps to avoid or minimize them, we can help insure our quality water resources can be enjoyed well into the future. Anglers can further help insure quality fishing by practicing selective harvest and catch and release. Anglers and boaters are reminded to help stop the spread of invasive species by removing all aquatic plants from boats, trailers, and equipment. All drain plugs must be removed and live and bait wells must be drained before leaving the access. Anglers and boater are encouraged to power wash and thoroughly dry all equipment prior to use in another water body.

Near shore sampling was conducted on Helen Lake on August 19 as part of a statewide effort to collect Index of Biological Integrity data. This was the second sampling of Helen in 2011 and was conducted to meet IBI sampling protocol requiring some lakes to be sampled twice per summer.

N. Pike abundance has increased since 1977 and perch abundance has declined. Crappie abundance is fairly high but little change has occurred since 1977. Panfish abundance is within normal limits for this type of lake. Natural Repro- duction appears adequate for fish population maint enance.

Based on Minnesota DNR survey data, anglers target Largemouth Bass, Hybrid Sunfish, Northern Pike, Black Crappie, and Pumpkinseed in Helen. See the full species list above for catch rates, size structure, and quality scores.

Minnesota DNR records list public access for Helen. Check the DNR LakeFinder page for the launch type and directions before you go.

Helen has a maximum depth of 33 feet and a mean depth of 15 feet, per Minnesota DNR data.

The most recent Minnesota DNR survey data for the main sport fish in Helen is from 2011. Surveys this old should be treated with some caution — fish populations change over time.

No invasive species are on record for Helen in Minnesota DNR data. Always clean, drain, and dry your equipment to help keep it that way.