republic-os/legislation/us/states/ia/2023-2024/sf-455.md

---
type: "Bill"
title: "A bill for an act relating to the regulation of topsoil and storm water at construction sites."
description: "A bill for an act relating to the regulation of topsoil and storm water at construction sites."
jurisdiction: "us/states/ia"
legislature: "Iowa General Assembly"
session: "2023-2024"
identifier: "SF 455"
citation: "Iowa SF 455 (2023-2024)"
classification: ["bill"]
subjects: ["construction work", "county government", "runoff", "soil and water conservation", "soils", "storm water management"]
status: "enacted"
primary_sponsors: []
version_count: 16
action_count: 47
vote_count: 5
first_action: "2023-02-28"
last_action: "2024-04-29"
source: "openstates"
source_identifier: "ocd-bill/3685490e-3850-43d0-ba9b-2e8a370acf78"
source_url: "https://www.legis.iowa.gov/legislation/billTracking/billHistory?billName=SF 455&ga=90"
source_hash: "a62430a5e313aa65e3b50eb049088e5079339106946435a794acfb2a8cc272eb"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-ia"]
---

# Iowa SF 455 (2023-2024) — A bill for an act relating to the regulation of topsoil and storm water at construction sites.

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **Introduced** (filed) — [source](https://www.legis.iowa.gov/docs/publications/LGI/90/attachments/SF455.html)
2. **Amendment H-1193** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/90/H1193.pdf)
3. **Amendment H-1209** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/90/H1209.pdf)
4. **Amendment H-1304** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/90/H1304.pdf)
5. **Amendment H-1306** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/90/H1306.pdf)
6. **Amendment H-1321** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/90/H1321.pdf)
7. **Amendment H-8004** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/90/H8004.pdf)
8. **Amendment H-8122** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/90/H8122.pdf)
9. **Amendment H-8162** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/90/H8162.pdf)
10. **Amendment S-3074** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/90/S3074.pdf)
11. **Amendment S-3082** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/90/S3082.pdf)
12. **Amendment S-5058** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/90/S5058.pdf)
13. **Reprinted** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/LGR/90/attachments/SF455.html)
14. **Reprinted Marked Up** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/LGRM/90/attachments/SF455.html)
15. **Signed Enrolled Bill (PDF)** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/LGE/90/Attachments/SF455_GovLetter.pdf)
16. **Enrolled** (enrolled) — [source](https://www.legis.iowa.gov/docs/publications/LGE/90/attachments/SF455.html)

## Votes

- Shall the bill pass? — **29–18** (pass) · upper
- Shall the bill pass? — **53–46** (pass) · lower
- Shall amendment S-3082 to amendment S-3074 be adopted? — **15–33** (fail) · upper
- Shall the bill pass? — **44–49** (fail) · lower
- Shall the bill pass? — **33–15** (pass) · upper

## Sponsors

- COMMITTEE ON LOCAL GOVERNMENT — primary (organization)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2023-02-28** Introduced, placed on calendar. `introduction`
- **2023-02-28** Committee report, approving bill. `committee-passage`
- **2023-03-14** Amendment S-3074 filed. `amendment-introduction`
- **2023-03-15** Amendment S-3082 filed, lost. `amendment-introduction`
- **2023-03-15** Amendment S-3074 adopted. `amendment-passage`
- **2023-03-15** Passed Senate, yeas 33, nays 15. `passage`
- **2023-03-15** Immediate message.
- **2023-03-15** Message from Senate.
- **2023-03-15** Read first time, referred to Local Government. `reading-1`
- **2023-03-21** Subcommittee: Stoltenberg, Deyoe and Staed.
- **2023-03-22** Subcommittee Meeting: 03/23/2023 8:00AM House Lounge 2.
- **2023-03-27** Subcommittee recommends passage. Vote Total: 2-0. `committee-passage-favorable`
- **2023-03-29** Committee report, recommending passage. `committee-passage`
- **2023-03-29** Placed on calendar.
- **2023-04-05** Amendment H-1193 filed. `amendment-introduction`
- **2023-04-06** Placed on calendar under unfinished business.
- **2023-04-12** Amendments H-1209 and H-1233 filed.
- **2023-04-24** Amendment H-1304 filed. `amendment-introduction`
- **2023-04-25** Amendment H-1306 filed. `amendment-introduction`
- **2023-05-01** Amendment H-1321 filed. `amendment-introduction`
- **2023-05-04** Rereferred to Local Government.
- **2024-01-10** Subcommittee: Dunwell, Amos Jr. and Stoltenberg.
- **2024-01-16** Subcommittee Meeting: 01/17/2024 8:00AM House Lounge 2.
- **2024-01-17** Subcommittee recommends passage. Vote Total: 2-1. `committee-passage-favorable`
- **2024-02-06** Committee report, recommending amendment and passage. `committee-passage`
- **2024-02-07** Committee amendment H-8004 filed. `amendment-introduction`
- **2024-02-07** Placed on calendar.
- **2024-03-04** Amendment H-8122 filed. `amendment-introduction`
- **2024-03-05** Amendment H-8162 filed. `amendment-introduction`
- **2024-03-06** Amendment H-8162 to committee amendment H-8004 adopted. `amendment-passage`
- **2024-03-06** Committee amendment H-8004 adopted, as amended. `amendment-passage`
- **2024-03-06** Amendments H-1193, H-1209, H-1233, H-1304, H-1306, H-1321 and H-8122 out of order.
- **2024-03-06** Failed to pass House, yeas 44, nays 49.
- **2024-03-07** Explanation of vote.
- **2024-03-06** Motion filed to reconsider vote on bill.
- **2024-03-11** Motion to reconsider vote prevailed.
- **2024-03-11** Passed House, yeas 53, nays 46. `passage`
- **2024-03-11** Immediate message.
- **2024-03-12** Message from House, with amendment S-5058.
- **2024-03-13** Fiscal note.
- **2024-03-25** Senate concurred with S-5058.
- **2024-03-25** Passed Senate, yeas 29, nays 18. `passage`
- **2024-03-25** Immediate message.
- **2024-03-25** Message from Senate.
- **2024-04-10** Reported correctly enrolled, signed by President and Speaker, and sent to Governor.
- **2024-04-10** Signed by Governor. `executive-signature`
- **2024-04-29** Fiscal note.

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/3685490e-3850-43d0-ba9b-2e8a370acf78`. Confidence: reported (aggregated from official Iowa legislature records).