Retired Segment: Twelvemile Creek
Segment Parameters
Segment ID
6571
Segment Name
Twelvemile Creek
Location Desc
from tributary (T71N R29W Sec12) to tributary (T72N R29W Sec7 SW)
Uses
A1p,BWW1p
WBType
River
Size
10.27
CreateDate
9/3/2015 10:07:47 AM
LegacyADBCode
IA 05-GRA-0131_0
Basins
05-GRA
Retirement
Retired Date
11/22/2021 9:13:05 AM
Reason
This segment’s assessment history goes back to only 2014, and every assessment was “Not Assessed”. This segment’s linework was merged with that of segment 1365 to match the SWC, and this particular segment ID is now retired.
Segment Memos
6/15/2020
Due to changes in Iowa’s surface water classification approved by U.S. EPA in 2008, this segment has presumptive Class A1 primary contact recreation and Class BWW1 warmwater aquatic life designated uses. According to Iowa Water Quality Standards, all perennial streams and intermittent streams with perennial pools that are not specifically listed in the Iowa surface water classification are designated as Class A1 and Class BWW1 waters.
Assessments
2020 Assessment Cycle
- Overall IR Category
- 3
- Trend
- Unknown
- Last Updated
- 10/26/2020 12:54:46 PM
Use Support
A1p
Not Assessed
BWW1p
Not Assessed
GenUse
Not Assessed
Summary
Insufficient water quality information available to assess use support.
Narrative
2018 Assessment Cycle
- Overall IR Category
- 3
- Trend
- Unknown
- Last Updated
- 9/12/2019 1:06:40 PM
Use Support
A1p
Not Assessed
BWW1p
Not Assessed
GenUse
Not Assessed
Summary
Insufficient water quality information available to assess use support.
Narrative
2016 Assessment Cycle
- Overall IR Category
- 3
- Trend
- Unknown
- Last Updated
- 3/28/2017 2:06:50 PM
Use Support
A1p
Not Assessed
BWW1p
Not Assessed
GenUse
Not Assessed
Summary
Insufficient water quality information available to assess use support.
Narrative
2014 Assessment Cycle
- Overall IR Category
- 3a
- Last Updated
- 2/17/2015 7:37:47 AM
- Segment Classes
- General Use,Class A1,Class B(WW-1)
Assessments
- overall
- Not assessed
- assessType
- Not Assessed
Assessment Levels
Summary
Insufficient water quality information available to assess use support.
Narrative
Insufficient water quality information available to assess use support. Thus, this waterbody is considered Not Assessed.