East Lake (Osceola) IA 04-LDM-1065

Assessment Comments

Assessment is based on results of lake monitoring and surveys by IDNR Fisheries Bureau.

Basis for Assessment

Assessment from the 1992 report (PS) was changed to FST for the 1994 report for the following reasons:  (1) DNR Fisheries believe uses at the lake are FST, (2) results of monitoring in 1990 show that average levels of secchi and TSS are slightly worse than the overall averages for the 116 SPOLs sampled in 1990 and 1992; results, however, also show that levels of total-P and chl-a approach the overall means + 1 SD.   Thus, monitoring data suggest that water quality is below average but within acceptable limits for SPOLs in Iowa (i.e., within 1 SD from the overall SPOL means).   Although designated for swimmable uses, lake does not have a swimming beach, and Bachmann et al.  (1994) report swimming.   Fishable uses threatened by sediment and nutrients from ag NPSP.