Iowa DNR
Iowa DNR

ADBNet

Water Quality Assessments
Impaired Waters List

Smith Creek IA 03-NSK-871

mouth (S18 T76N R12W Keokuk Co.) to headwaters in NE 1/4 S23 T77N R13W Keokuk Co.

Assessment Cycle
2004
Result Period
2000 - 2002
Designations
Assessment Methodology
Assessment Type
Monitored
Integrated Report
Category 4d
Legacy ADBCode
IA 03-NSK-0038_0
Overall Use Support
Partial
Aquatic Life Use Support
Partial
Documentation
Assessment Comments

Assessment is based on results of an IDNR investigation of a fish kill in November 2001.

Basis for Assessment

SUMMARY:  The general aquatic life uses are assessed (monitored) as "partially supported" based on results of an IDNR investigatio of a fish kill in November 2001.    This assessment is the same as that developed for the 2002 reporting cycle.  

EXPLANATION:  A fish kill occurred on this stream segment on November 8, 2001.   The kill affected approximately 1 mile of Smith Creek in S1, T76N, R13W, Keokuk County approximately 2.5 miles NE of What Cheer.   The kill was caused by the discharge of land-applied hog manure; an estimated 8,300 fish were killed.   The party responsible for the kill was identified, and restitution was sought.   According to DNR's assessment methodology for Section 305(b) reporting, occurrence of a single pollution-caused fish kill during the most recent three-year period (1999-2001) indicates "partial support" of the aquatic life uses.   Thus, the general aquatic life uses of this stream segment were assessed as "partially supported."

Monitoring and Methods
Assessment Key Dates
11/8/2001 Fishkill
Methods
140 Incidence of spills and/or fish kills
Monitoring Levels
Biological 0
Habitat 0
Physical Chemistry 0
Toxic 0
Pathogen Indicators 0
Other Health Indicators 0
Other Aquatic Life Indicators 0
# of Bio Sites 0
BioIntegrity N/A
Causes and Sources of Impairment
Causes Use Support Cause Magnitude Sources Source Magnitude
Organic enrichment/Low DO Aquatic Life Support Moderate
  • Intensive Animal Feeding Operations
  • Moderate
Unionized Ammonia Aquatic Life Support Moderate
  • Intensive Animal Feeding Operations
  • Moderate