West Des Moines Ionwave #0510-030-2023 Addendum 2

Grand Avenue Widening Project – Major Road, Signal, and Digital Infrastructure Construction in West Des Moines, IA

The City of West Des Moines is seeking bids for the Grand Avenue Widening project, a major infrastructure initiative from South Jordan Creek Parkway to South 60th Street. - Government Buyer: - City of West Des Moines, City Clerk's Office - Scope of Work: - Grading, excavation, and subgrade preparation (over 12,000 CY of earthwork) - Installation of reinforced Portland Cement Concrete (PCC) paving (approx. 19,836 SY of 9-inch PCC) - Storm sewer modifications, including installation and removal of various sizes of reinforced concrete pipe (RCP) - Water main and fire hydrant assemblies, valve box extensions and replacements - Construction of curbs, gutters, medians, sidewalks, and detectable warnings - Installation of permanent traffic signals at three intersections, including: - Swarco McCain FLeX Controller and ATC 350i Cabinet - Managed Ethernet Switch (EtherWan) - Vehicle and pedestrian signal heads (Dialight or Leotek) - Pedestrian push buttons (Polara Engineering) - Traffic signal poles and pedestals (Valmont Industries or Millerbernd Manufacturing) - Vehicle detection system (NoTraffic Video/Radar) - Emergency vehicle preemption system (Opticom) - Battery backup system (Clary SP1250) - Traffic monitor system (Axis Q6075e-E PTZ Dome Camera) - Fiber optic cable (Corning) - Pavement markings, signage, and traffic control - Digital enterprise conduit and vault installation (including 7-way multi-duct, various HDPE conduit sizes, and large vaults) - Landscaping, seeding, erosion control, and site restoration - Unique/Notable Requirements: - All electrical and signal equipment must be new, from reputable manufacturers, and compliant with NEMA, NEC, ASTM, UL, MUTCD, and AASHTO standards - Preference for Iowa-grown products and labor - Four-year maintenance guarantee required - Adherence to federal funding requirements and environmental permits - Bid security (10%), performance and payment bonds (100%), and liquidated damages for late completion - Detailed as-built documentation and acceptance testing for fiber/conduit systems - OEMs and Vendors Mentioned: - Swarco McCain, EtherWan, Dialight, Leotek, Polara Engineering, Valmont Industries, Millerbernd Manufacturing, NoTraffic, Opticom, Clary, Axis Communications, Corning, 3M (for reflective sheeting), PELCO (for mounting hardware) - Products/Services Requested: - See detailed line items below for quantities and descriptions - Place of Performance: - West Des Moines, Iowa, with key locations including Council Chambers at 4200 Mills Civic Parkway

Description

This solicitation is a Request for Bid issued by the City of West Des Moines for the Grand Avenue Widening project from South Jordan Creek Parkway to South 60th Street. The project involves furnishing all labor, equipment, and materials for approximately 12,500 cubic yards of grading, subgrade preparation, and modified subbase; 19,836 square yards of 9-inch reinforced PCC paving; 1,985 square yards of full-depth PCC patching; storm sewer modifications; permanent traffic signals at three intersections; pavement markings; traffic control; and site restoration. Bids must be submitted electronically by May 6, 2026, and the project requires substantial completion by October 31, 2026, with full completion by June 30, 2027. The contract includes requirements for bid security, performance and payment bonds, and a maintenance guarantee for four years.

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