Design work under this contract encompassed preliminary engineering and final structural design for rehabilitation of the stations, with the exception of Pelham Parkway. The surveying services for this project included:

TOPOGRAPHIC SURVEY/UTILITY MAPPING

KSE prepared topographic and utility surveys (including reflected ceiling plans for all utilities at the platform level) for street-level areas, mezzanine levels, and platform levels. Street-level surveys included utility, stair, and intersection locations; curbs and sidewalks; lane lines, striping, and gore striping; spot elevations; and curb reveals, among other physical characteristics. Mezzanine-level surveys located stairs, and critical structures (mezzanine hangars, through girders, and tops of staircases and landings, among other such features), including their elevations. The firm also provided legal grade elevations and minimum existing clearances between the lowest portion of each station and the roadway.
Utilities identified at the stations included New York City DOT traffic signals and street lighting; Con Edison electric and gas lines and customer electrical service boxes; and telephone, cable, sewer, and water services.

STRUCTURAL ENGINEERING

KSE conducted platform and station (wall) condition surveys and prepared associated drawings showing concrete spalls, cracks, defective joints, and other structural deficiencies. Platform condition surveys included areas both underneath and above the platforms and were intended to map, identify the type of concrete used (precast or cast-in-place), and quantify the magnitude of concrete cracking and spalling on each platform. KSE also checked structural calculations to determine whether columns supporting the station mezzanines were overstressed.

SITE/CIVIL ENGINEERING

Sidewalk reconstruction plans will be prepared to address existing deficiencies and accommodate the reconstruction of the stairway landings at street levels. A Builders Pavement Plan were prepared for the sidewalk reconstruction.