Prairie Rose Lake IA 05-NSH-1462

Assessment Comments

Basis for Assessment

Both fishable and swimmable uses were assessed as  FST for the following reasons: (1) BPJ of DNR Fisheries, (2) results of monitoring show that average levels of secchi depth, total-P, and TSS are approximately equal to, or better than, overall averages for the 86 SPO impoundments sampled in 1990 and 1992; the average level of chl-a, however was worse than the overall average + 1 SD; (3) the sedimentation rate is rel.  low (1.5 cm/yr) and life expectancy is rel.  long (130 years) compared to other SPO impoundments; (4) lake does not have problems with fishkills; (5) the lake lake supports a the typical amount of fishing but a rel.  low amount of swimming.   Summary report for RCWP notes that implement of BMPs in WS has improved WQ, but monitoring data cannot be used to document the improvements (Gale et al.  1992).