As a subconsultant, SI Engineering, P.C. (SIE) performed a study to evaluate the structural integrity, develop an abbreviated Master Plan (MP), and prepare contract documents for the structural repairs and waterproofing of the 9th Avenue Station, West End Line. The 9th Avenue Station on the West End Line consists of two levels. The lower level does not have a passenger service and is inactive. The upper level is active and carries three tracks of “D” train service.
SIE assisted with the inspection of the station. The inspection consisted of hands-on inspection of both the upper and lower levels of the station. SIE inspectors determined and reported on the structural condition of existing structural members at the lower level of the station and ascertained and reported on structural components requiring rehabilitation and / or replacement. SIE also identified and reported on existing subway systems (communications, electrical, DC power, drainage, etc.) possibly interfering with structural repairs or component replacement during construction.
Following inspections, SIE provided support in preparing the inspection reports, the Master Plan Report including special repair details if required, concept plans, and Force Account requirements. SIE continued to provide design and CAD support through the 60%, 90%, 100%, and Bid Set submissions, including specifications. Included in these efforts was comment response / resolution following MTA reviews. SIE also provided staff augmentation to support the structural design, report writing, and drawings development as required. SIE attended a pre-bid site tour and provided support in the review and response of bidder’s questions. We provided staff augmentation to support the structural team in this phase of the project.
