While we do not allow any type of swimming or boating at Jansen Family Park, we are doing all that we can to encourage other uses for the pond. The pond is a registered fish farm with the Wisconsin Department of Agriculture, Trade & Consumer Protection. This means that as long as you have our permission to fish here you do not need a fishing license.
Back in the early 1980's, the city was looking for a source of clay to cap the old city dump just up the road. After referring to the local soils maps they found what they thought was the perfect clay very close by. They brought in the heavy equipment and begun to haul out the clay. The odd shape of the pond shows the original vein they they were following. When they had most of the clay they needed they dug a channel over to the artisan well. They did not consult the plat map as they were doing this and they ended up digging on to the neighbors property. So the very end of the finger and a small section of the south west corner of the pond is actually not on Jansen Park property.
As of June 2015 the property to the west of the park has been sold and the new neighbor has made it very clear that he will not allow full access to the path around the pond. Please stay off of the property blocked off by the small finger of the pond. .
After the pond filled and it was originally stocked it became apparent that the clay used to cap the dump was not sufficient to keep the water from running through it. There was some concern as to the effects that the runoff would have on the ground water in the area. The city took many water samples from the wells in the area and from the pond. They even caught a couple of fish from the pond and had them tested to see if there was any contamination. All of the tests came back negative.The water from the wells was safe to drink and the fish were safe to eat.
After Jack bought the park and finished most of the building on the property, it was decided to make the pond a more suitable fish habitat. It was found that the pond was only about 6 to 7 feet deep, making it susceptible to a freeze out. We were advised to make the pond at least 12 feet deep in the middle. A lot of material was removed and that was used to fill in the hollow to the east of the building and the rest was used to create the berm on southeast shore of the pond.
At the same time that we were doing this dredging we hired Aquatic Biologists, Inc. to help us create a healthy environment for the fish we planned to stock. After the pond was dug, Robert Langjahr placed numerous pallet piles around the pond for fish habitat. Originally we stocked hybrid bluegills, largemouth bass, and fat head minnows as a food fish. Later on we stocked some yellow perch even some walleye.
As of 2005 we no longer stock the pond. The main reason for this is that I became aware of a small group of people that would come over to the pond and would catch large amounts of very small fish and take them home. We originally hoped to create a self sustaining fish population at the park that would not have to replenished every year.
At this time we are in the process of creating a sign to inform the public that we would like the pond to be a catch and release pond. Even though we have not stocked the pond in two years We have been told that people are still catching some nice bluegills, some 12" to 14" bass and even the random yellow perch from time to time. We have become concerned when we heard that some one caught a northern. If there is indeed a northern in the pond we may have more and they will consume all of the smaller food fish and not leave anything for the bass and other good species.