Iowa DNR
ADBNet

Water Quality Assessments

Impaired Waters List

Retired Segments

Retired segments are segments that are no longer used. The reason for retirement is provided below. The details and assessment history for each of these segments is preserved below.

Onion Creek IA 02-IOW-6361
from mouth (SE1/4 S23 T83N R16W Tama Co.) to headwaters in S6 T83N R15W Tama Co.
Not in Surface Water Classification (SWC) document. There are only ~ 0.8 miles of this stream not on tribal lands before it “starts” at a large pond near the headwaters. The mouth is completely within tribal land. IADNR will never assess this segment, as it doesn't have primacy on tribal land.
Uses
A1p,BWW1p
Assessments: Overall Category
  • 2020 : 3
  • 2018 : 3
  • 2016 : 3
  • 2014 : 3a
  • 2012 : 3a
  • 2010 : 3a

Retired 11/22/2021 2:05:29 PM

Cattail Creek IA 02-IOW-6360
from mouth (NW1/4 S30 T83N R15W Tama Co.) to headwaters (SE1/4 S18 T83N R15W Tama Co.) excluding portions on Mesqwaki Settlement
Not in Surface Water Classification (SWC) document. Almost the entirety of the waterbody is in the Mesqwaki settlement, so IADNR will never assess this segment, as it doesn't have primacy on tribal land.
Uses
A1p,BWW1p
Assessments: Overall Category
  • 2020 : 3
  • 2018 : 3
  • 2016 : 3
  • 2014 : 3a
  • 2012 : 3a
  • 2010 : 3a

Retired 11/22/2021 1:11:20 PM

Twelvemile Creek IA 05-GRA-6571
from tributary (T71N R29W Sec12) to tributary (T72N R29W Sec7 SW)
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.
Uses
A1p,BWW1p
Assessments: Overall Category
  • 2020 : 3
  • 2018 : 3
  • 2016 : 3
  • 2014 : 3a

Retired 11/22/2021 9:13:05 AM