Swan Lake IA 04-RAC-1199

Assessment Comments

Basis for Assessment

Used assessments of support of the Class A (primary contact) uses (=PS) and the Class B(LW) aquatic life uses (=PS) developed for the 1994 report.   DNR Fisheries biologist Kay Hill has conducted water quality monitoring in 1994, 1995 and 1996, and he states that water quality in the lake remains very poor due to blooms of algae that severely limit water transparency in summer months.   Hill attributes much of the problem to the large population of carp (approx 200 lbs/acre) that thrive in this shallow lake.   Dave Olson (Carroll Co.  Cons.  Bd) stated in III:25:97 phone conversation that farmer continues to spread manure on side hill that drains to lake just outside of park boundary and spreading on frozen ground occurs.   Olson said that algae blooms severely limit swimming uses and discourage boat-bass fishermen from using the lake.