# Illinois BidBuy #27-422DNR-MINES-B-54241

Change Order for Lake Outlet Structure Modifications at Abandoned Mined Lands Site

**Posted:** September 25, 2026
**Respond By:** October 12, 2026
**Identifier:** 27-422DNR-MINES-B-54241
**NAICS:** 237110, 237990, 238110

This change order opportunity from the Illinois Department of Natural Resources, Office of Mines and Minerals, Abandoned Mined Lands Reclamation Division, concerns modifications to a lake outlet structure at the Buwick site.
- Government Buyer:
  - Illinois Department of Natural Resources
  - Office of Mines and Minerals
  - Abandoned Mined Lands Reclamation Division
- Scope of Work:
  - Modification of Structure No. 1 (primary lake outlet)
  - Replacement of the originally specified precast concrete structure with a larger precast box structure
  - Replacement of the originally specified concrete inlet pipe with a longer ductile iron pipe
- Products Requested:
  - Larger precast box structure (quantity: 1)
  - Longer ductile iron inlet pipe (quantity: 1)
- Services Requested:
  - Excavation and installation services for the above modifications
- OEMs and Vendors:
  - No specific OEMs or vendors are named in the notice
- Notable Requirements:
  - All work is to be performed at the Buwick site in Springfield, Illinois
  - Change order issued as a lump sum item
  - No unique requirements beyond the described scope changes
- Classification:
  - NIGP code 91244 (Excavation Services)

### Description

This is a change order notice for bid number 27-422DNR-MINES-B-54241. The change order increases the scope and cost of the original contract. It involves modifications to Structure No. 1 associated with the primary lake outlet, replacing the originally specified precast concrete structure with a larger precast box structure and changing the inlet pipe from concrete to ductile iron pipe. The procurement is managed by the Department of Natural Resources, Office of Mines and Minerals in Illinois.

[View original listing](https://www.bidbuy.illinois.gov/bso/external/bidDetail.sda?docId=27-422DNR-MINES-B-54241&external=true&parentUrl=close)