Contract Awarded for Roberto Clemente Bridge
The Pennsylvania Department of Transportation has awarded a contract in the amount of $34,477,777 to Mosites Construction Company of Pittsburgh for rehabilitation of the Sixth Street (Roberto Clemente) Bridge in Pittsburgh.
The project is estimated to cost between $30,000,000 and $35,000,000.
The contract bid Nov. 4 last year and was awarded Dec. 2. Work is slated to begin Feb. 14.
Mosites Construction Company was the lowest of four apparent bidders. Additional bids include:
Scope of Work
Mosites Construction of Pittsburgh has been awarded a contract for rehabilitation of the Sixth Street (Roberto Clemente) Bridge including fabricated structural steel repair to floor beams, buckle plates, tower bases, stringers, stiffening girders, approach span girders and other miscellaneous steel structures. The work will also include cleaning tower interiors, cleaning of masonry surfaces and coating application. The bridge has a 430-foot span between towers with a total suspended length of 960 feet.
As part of the rehabilitation of this structure, an estimated 11,000 “love locks” will be removed from the bridge’s metal mash panels. The bridge owner, Allegheny County, will be donating the removed locks to the Industrial Arts Workshop of Hazelwood to create a public art installation. The structure will be closed for repairs through December 2023.
The contractor will perform cleaning and painting of stiffening girder and tower interior surfaces using an organic zinc-rich coating system. The work will include removal of bolted access plates and pre-cleaning to remove all debris, and preliminary abrasive blast-cleaning to facilitate inspection of base metal deterioration. The steel will require final abrasive blast-cleaning soluble salt and chloride remediation, and the application of a three-coat organic zinc/epoxy/urethane system selected from NEPCOAT List B.
The project includes painting existing hand-railings along Fort Duquesne Boulevard and coating existing mesh-style handrails. The mesh-style handrails will require abrasive blast-cleaning, soluble salt remediation and application of an epoxy primer and urethane top coat. Hand railings along Fort Duquesne Boulevard will require abrasive blast-cleaning, soluble salt remediation and application of a zinc-rich primer, epoxy intermediate and urethane finish coating.
The contract includes additional items for coating existing structural steel members. The steel will be abrasive blast-cleaned to Near White standards (SSPC-SP 10/NACE No. 2), tested for soluble salt with as-needed chloride remediation and recoated with a 3-coat organic zinc-epoxy-urethane system selected from NEPCOAT List B. Containment according to SSPC-Guide 6 and waste disposal according to Guide 7 are required.
Work will include cleaning of towers and membrane waterproofing application at tower bases. An additional 261 square yards of anti-graffiti coating application is required for concrete and masonry surfaces. The anti-graffiti system will consist of either a two-coat epoxy/siloxane or three-coat epoxy/urethane/urethane system. Contractors will also oversee high molecular weight methacrylate deck repair. The estimated cost for the methacrylate system is $50,000. Additionally, 66 square yards of epoxy resin protective coating will be used on reinforced concrete surfaces.
The project includes 9,904 square yards of penetrating sealant protective coating for reinforced substructure surfaces and an additional 4,398 square yards of penetrating sealant protective coating to be applied to concrete superstructure surfaces. The owner-approved coating manufacturers are BASF and Euclid.
Certifications to SSPC-QP 1, QP2 and QP 3 are required.
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