Lake Ahquabi IA 04-LDM-1080

Assessment Comments

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

Basis for Assessment

Both fishable and swimmable uses were assessed as PS for the following reasons:  (1) BPJ of DNR Fisheries; (2) results of monitoring in 1990 show that average levels of secchi depth, chl-a, total-P, and TSS were worse than overall averages for the 86 SPO impoundments sampled in 1990 and 1992; the level of TSS was worse than the overall average + 1 SD and was one of the highest TSS averages for any of the 116 SPOLs sampled.   Bachmann (1991) reported that problems w/ transparency were related more to suspended sediments than to chlorophyll; (3) Bachmann (1991) reported a decrease in lake volume of 221,000 m3 from 1973 and 1990 due to sedimentation and that the rate of sedimenation for Ahquabi was relatively high.   Bachmann et al.  (1994) report relatively high level of use for swimming and rel low use for fishing.