Allen Creek IA 06-BOY-1519

Assessment Comments

Assessment based on 2002 Fisheries data: FIBI = 44 (fair). FIBI BIC = 31.

Basis for Assessment

The assessment was based on data collected in 2002 as part of a DNR Fisheries stream sampling project: Cold Springs Fish Management.   A series of biological metrics which reflect stream water quality and habitat integrity were calculated from the Fisheries sampling data.   The biological metrics are based on the numbers and types fish species that were collected in the stream sampling reach.   The biological metrics were combined to make a fish community index of biotic integrity (FIBI).   The index ranks the biological integrity of a stream sampling reach on a rising scale from 0 (minimum) to 100 (maximum).   The 2002 FIBI was 44 (fair).   The aquatic life use support was assessed as Fully Supporting (=FS), based on a comparison of the FIBI score with biological impairment criteria (BIC) established for previous Section 305(b) reports.  The biological impairment criteria were determined from a statistical analysis of data collected at stream ecoregion reference sites from 1994-2004.   The non-riffle site FIBI BIC for this ecoregion is 31.