Title
Resolution to Approve Contract Amendment No. 2 with DLZ Michigan, Inc. for Construction Support Services for the 2015 Wastewater Treatment Plant Access Bridge Repair Project ($86,051.39)
Memorandum
Your approval is requested to amend a Professional Services Agreement in the amount of $86,051.39 with DLZ Michigan, Inc. (DLZ) to provide construction engineering, management and inspection services for construction of the 2015 Wastewater Treatment Plant (WWTP) Access Bridge Repair Project.
The purpose of this project is to construct repairs to the access bridge for the City's WWTP. The bridge is a single lane structure that was first constructed in 1934 and traverses the Huron River to provide access to the plant. In addition to plant traffic, the bridge also conveys three sanitary sewers and one natural gas line. The most recent improvements to the bridge were made in 2000 when the deck was overlaid, the railings and guardrails were replaced, the expansion joints were replaced and the substructure was patched.
Based on bi-annual inspections since 2000, a major bridge replacement project was anticipated and scheduled for 2017. However, a thorough inspection performed during 2014 revealed that the bridge has significant metal and concrete corrosion but is in better condition than anticipated. Implementing the repair project at this time will be more cost efficient and will postpone the need for bridge replacement by extending the life of the existing bridge for another ten to fifteen years with scheduled maintenance.
Work to be done under this project includes removal of timber debris upstream of pier, removing and replacing pier diaphragms, partial cleaning and coating of structural steel, chipping and patching of substructure, crack injection of substructure, placing scour countermeasures, cleaning expansion joint, brush and tree removal, and slope restoration.
On April 21, 2014, Council approved a contract with DLZ in the amount of $32,75...
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