Retired Assessment Units

Retired assessment units are removed from the assessment lists. Reasons for retirement, details, and assessment history for these retired segments are preserved below.

Iowa River IA 02-IOW-3102

from confluence with Deer Creek at Tama (S34 T83N R15W Tama County) to confluence with small unnamed tributary near boundary of Meskwaki settlement (T83N R15W Sec32 SE NW Tama County)

For the 2024 cycle this segment was merged with segment 639. It was created from the remains of the removed Mesqwaki segment for the Iowa River, and is inaccessible for assessment purposes.

Uses

A1,BWW1,HH

Assessments: Overall Category

2026 : 3
2022 : 2

Retired 8/27/2026 12:58:26 PM

West Forney's Lake B IA 06-WED-1695

T70N R43W Sec22 Fremont CountySW of Bartlett.

This site is a duplicate of segment 1681 Forney Lake. This one has never been assessed, and all assessments were applied to 1681 in the past.

Uses

BLW,HH

Assessments: Overall Category

2024 : 3
2022 : 3
2020 : 3
2018 : 3
2016 : 3
2014 : 3a
2012 : 3a
2010 : 3a
2008 : 3a
2006 : 3a
2004 : 3a
2002 : 0
2000 : 0
1998 : 0
1996 : 0

Retired 2/6/2025 9:25:31 AM

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