Attachment J-3 Specifications Updated_AMD-2026-06-03.pdf

This document is Amendment 0003 to Solicitation No. W912EK26BA002, a federal construction contract issued by the U.S. Army Corps of Engineers for flood risk management work in Cedar Rapids, Iowa.

The amendment revises three primary specification sections: Section 00 73 05 (Pages 10-17), Section 01 22 00 (Price and Payment Procedures), and Section 31 41 16 (Metal Sheet Piling). Key modifications include revised contractor requirements for mobilization/demobilization with 60 percent payment upon completion and 40 percent upon final demobilization; clarified clearing and grubbing cost allocation to include disposal of removed trees and trees felled by others; updated watermain modifications to specify inclusion of concrete supports, bedding, drain piping with geogrid screens, thrust blocks, and abandonment of existing watermains; and new flood wall construction specifications requiring minimum elastic section modulus of 30 cubic inches per foot and minimum thickness of 0.375 inch for sheet piling sections. The amendment also introduces amended metal sheet piling requirements (Section 31 41 16), including specifications for hot-rolled steel sections meeting ASTM A572/A572M Grade 50, interlock requirements with minimum 5-degree swing angle, fabrication methods per Section 05 50 14, and comprehensive pile driving procedures addressing equipment, placement, driving sequences, and documentation. Additional specifications address high water action planning, special safety requirements for work over or near water with U.S. Coast Guard-approved life jackets, equipment operation on floating plants with Activity Hazard Analyses, and coordination with Cedar Rapids Water Division for water service interruptions requiring 5-day to 48-hour advance notice depending on work type. The contract includes revised drawings identified in Volume 117 and establishes weather-dependent delay provisions with monthly anticipated adverse weather work days ranging from 6 to 31 days depending on season.