# Douglas County Ionwave #CI-2026-0109 Addendum 3

Construction of Sewer Conveyance Structures and Grit/Screening Facility for Northeast Omaha High-Rate Treatment Basin (NEOHRTB) – Package 2

**Posted:** August 12, 2026
**Respond By:** September 23, 2026
**Identifier:** CI-2026-0109 Addendum 3
**NAICS:** 237110, 237990, 238110, 238190

The City of Omaha Public Works Department is seeking bids for the construction of combined sewer conveyance structures and a Grit/Screening Facility as part of the Northeast Omaha High-Rate Treatment Basin (NEOHRTB) – Package 2.
- Government Buyer:
  - City of Omaha, Public Works Department
  - Douglas County Purchasing
- OEMs and Vendors:
  - Schaffer Manufacturing (referenced for custom-fabricated Corten steel grating)
  - American Cast Iron Pipe Co. (ductile iron process pipe)
  - U.S. Pipe and Foundry Co. (ductile iron process pipe)
  - Euclid Chemical (chemical sealer)
  - J.R. Smith (floor sink, trench drain, yard hydrant)
  - American Standard (water closet)
  - Woodford (wall hydrant)
- Products/Services Requested:
  - HP 14 x 89 bearing piles (driven and pre-drilled rock socket, total 2,131 + 303 linear feet)
  - Custom-fabricated Corten steel bar grating (Schaffer Manufacturing referenced)
  - Davit cranes (316 stainless steel, specified models)
  - Cast-in-place and architectural precast concrete
  - Access doors (Door No VAD-101, 2'6" x 2'6")
  - Signage (facility identification, 12" tall letters)
  - Ductile iron process pipe (American Cast Iron Pipe Co., U.S. Pipe and Foundry Co.)
  - Plumbing fixtures (water cannon, wall hydrants, floor drains, water closets, yard hydrant)
  - Electrical components and security systems
  - Mobilization/demobilization, bonds, permits, insurance
  - Environmental and stormwater pollution prevention plan (SWPPP) maintenance
  - Street repairs, crack repair, fencing/gates, construction management software/project website
- Unique/Notable Requirements:
  - Small & Emerging Small Business (SEB) reserve for ESB and SB Tier 1 & 2 (3.5% of bid)
  - Mandatory Economic Sustainability Plan (ESP) submission
  - City of Omaha General Contractor's License (Class A or B) and Mechanical Contractor License required
  - 5% bid bond for bids over $50,000; performance bond required upon award
  - All excavated soils must be disposed of at Pheasant Point landfill
  - Custom-fabricated Corten steel grating must match referenced viability (Schaffer Manufacturing)
  - Davit cranes must match specified models
  - Compliance with environmental, safety, and insurance requirements
  - FAA no hazard determination for temporary 120-foot crane
  - Extensive geotechnical and environmental assessments conducted on-site

### Description

This solicitation is for the construction of combined sewer conveyance structures, pipes, site work, and appurtenances including the 11th and Izard Active Control (IZAC) flow diversion structure, twin 60-inch diversion sewers, the 11th and Izard Grit and Screening Facility (IZGSF), and other supporting improvements. The project is part of the Northeast Omaha High-Rate Treatment Basin (NEOHRTB) Package 2. The anticipated Notice to Proceed date is December 23, 2026. The project includes a Small & Emerging Small Business (SEB) reserve for ESB and SB Tier 1 & 2 categories for 3.5% of the total bid.

[View original listing](https://douglascountypurchasing.ionwave.net/PublicDetail.aspx?bidID=1259&SourceType=1)