Little Cedar River IA 02-CED-578

from confluence with Burr Oak Cr. (S12 T98N R16W Mitchell Co.) to dam of impoundment at Stacyville in SE 1/4 S31 T100N R16W Mitchell Co.

Open Data Collection Period Modal

For purposes of developing stream/river water quality assessments for integrated reporting, three years of water quality data are typically used for both conventional pollutant parameters (e.g., indicator bacteria) and the less frequently monitored toxic parameters (e.g., toxic metals). Since the 2004 IR cycle, DNR has used a three-year data gathering period for streams, rivers, and beaches. For most assessments, the use of three years of data increases the number of samples upon which the decision on use support is based and helps address the problem of weather-related year-to-year fluctuations in water quality.

Due to the lower sampling frequency in Iowa’s ambient lake, biological, fish kill, and fish tissue monitoring programs, five years of data are used for developing IR assessments and for identifying Section 303(d) listings.

Data Type	Data Timeframe
Beach Sampling Data	CY 2012 - 2014
Stream/River Water Quality Data	CY 2012 - 2014
Lake Water Quality Data	CY 2010 - 2014
Biological Sampling Data	CY 2010 - 2014*
Fish Kill Data	CY 2010 - 2014
Fish Tissue Sampling Data	CY 2010 - 2014
Continuous Dissolved Oxygen Sampling Data	CY 2010 - 2014
*Biological sites sampled in both 2009 and 2013 were also assessed.

Open Segment Map
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Cycle: 2016
Release Status: Final
Overall IR: 3 - Insufficient data exist to determine whether any designated uses are met.
Trend: Unknown
Created: 9/23/2016 7:31:48 AM
Updated: 9/23/2016 7:31:48 AM

Use Support

Class A1

Recreation - Primary contact

Not Assessed

Class BWW1

Aquatic Life - Warm Water Type 1

Not Assessed

Class HH

Human Health -

Not Assessed

General Use

General Use water -

Not Assessed

Impairment Delistings

No delistings for this assessment cycle.

Documentation

Assessment Summary

The presumptive Class A1 (primary contact recreation) and fish consumption (Class HH) uses remain "not assessed" (IR 3a) due to the lack of information upon which to base an assessment. The degree to which the Class B(WW-1) aquatic life uses are supported is being changed from “fully supported” (evaluated) as assessed for the 2012 Integrated Reporting cycle to “not assessed” for the 2014 cycle. Previous Class B(WW1) aquatic life use assessments were based on 1999 IDNR Fisheries sampling data: "fully supporting" (IR 2a). Due to the age of these data (> 10 years), the aquatic life uses are now considered "not assessed" (IR 3a).

Assessment Explanation

Previous Class B(WW1) aquatic life use assessments were based on 1999 IDNR Fisheries sampling data: "fully supporting" (IR 2a). Due to the age of these data (> 10 years), the aquatic life uses are now considered "not assessed" (IR 3a).

[Note: Prior to the 2008 Section 305(b) cycle, this stream segment was designated only for Class B(WW) aquatic life uses, including fish consumption uses. Due to changes in Iowa’s surface water classification that were approved by U.S. EPA in February 2008, and due to the completion of a Use Attainability Analysis, this segment is also now designated for Class A1 (primary contact recreation) uses. This segment remains designated for warmwater aquatic life use (now termed Class B(WW1) uses), and for fish consumption uses (now termed Class HH (human health/fish consumption uses).]

Monitoring and Methods

Assessment Key Dates

None listed

Methods

150

Monitoring data more than 5 years old