Assessment Comments
Assessment is based on results of (1) IDNR-UHL ambient monthly monitoring from 2002-04 and (2) information on intermittency of this stream.
Basis for Assessment
SUMMARY: The Class B(LR) aquatic life uses are assessed (evaluated) as "fully supported " although this stream suffers from naturally-occurring problems with flow stability (i.e., intermittency). The sources of data for this assessment is the results of IDNR/UHL ambient water quality monitoring conducted from August 2002 through October 2004 at IDNR station 10340002 near Greene.
EXPLANATION: The Class B(LR) aquatic life uses are assessed (monitored) as “fully supported” based on results of routine ambient water quality monitoring. This stream is known to be prone to intermittency; the causes of this intermittency are believed to be naturally-occurring. Despite this problem, results of ambient water quality monitoring conducted by IDNR/UHL near Greene, Iowa, during the 2002-2004 assessment period continue to suggest “full support” of the Class B(LR) aquatic life uses. None of the samples collected violated state criteria for dissolved oxygen (20 samples), temperature (20 samples), pH (19 samples), or ammonia-nitrogen (12 samples); none of the four samples analyzed for pesticides and toxic metals contained levels above the Class B(LR) criteria. The results of this monitoring suggest that, when Flood Creek has sufficient water, the water quality is relatively good.
