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CIVIL DESIGN

SERVICE OVERVIEW

SIMCO provides certified Team Leaders (Professional Engineers) and Assistant Team Leaders for the biennial inspection of bridges in New York State. We have inspected concrete, steel, and hybrid structures ranging from culverts and small single-span structures carrying low traffic volumes to major interstate highway structures in densely populated urban areas.

FEATURED PROJECTS

Metro-North’s Harlem 125th Street Station is located in East Harlem on East 125th Street between Park Avenue northbound and Park Avenue southbound, under the Park Avenue Viaduct. It is a major Metro-North commuter rail hub, serving Grand Central Terminal in Manhattan.

The station complex, constructed in 1897, has a New York State Historic Preservation Office (NYSHPO) Opinion of Eligibility for listing on the National Register of Historic Places.

SIMCO is the Prime Consultant responsible for project management, delivery, alternatives identification and analysis, site/civil/utilities, electrical engineering, agency coordination, MPT, constructability review, construction phase services, and related activities.

This project involves design and construction phase services for demolition and design of new steel stairs for replacement of the two stairs south of East 125th Street. The existing stairs were severely deteriorated and did not meet the current NYS Building Code (see photo middle left). The new stairs are steel stringers and guardrails with aluminum treads and risers and stainless steel hand rails. The stairs are historically sensitive, NYS Building Code compliant, and designed to be resistant to deterioration by deicing salt.

The project was coordinated with numerous stakeholders, including various user departments within MTA Metro-North Railroad, NYCEDC, NYCDOT OCMC, SHPO, and others. Utilities within the project area were identified and contacted for coordination for underground facilities in the area, including Con Edison (electric and gas), Verizon, Empire City Subway, NYCDEP sewer and water, Time Warner, and MTA NYC Transit.

The project was advanced as an MTA Small Business Mentoring Program (SBMP) Tier II project.

The west stairway was opened on June 13, 2018. The east stair was opened on August 30, 2018.

Metro-North’s Harlem 125th Street Station is located in East Harlem on East 125th Street between Park Avenue northbound and Park Avenue southbound, under the Park Avenue Viaduct. It is a major Metro-North commuter rail hub, serving Grand Central Terminal in Manhattan and points north in New York and Connecticut. It is a highly visible area with significant public and commuter activity.

The station complex, constructed in 1897, has a New York State Historic Preservation Office (NYSHPO) Opinion of Eligibility for listing on the National Register of Historic Places.

SIMCO is the Prime Consultant responsible for the project management, project delivery, electrical engineering, MPT, constructability review, construction phase services, and related activities.

This project provided security lighting around the existing station building to enhance local security. Sixteen existing HP Sodium/Metal Halide fixtures were replaced with 39 high efficiency LED fixtures, which significantly enhanced lighting levels (10Fc) around the station perimeter. The fixtures and conduit are mounted on the Park Avenue Viaduct and not on the historic station building itself to avoid damaging the historic station exterior walls. The LED fixtures were selected to be sensitive to the historic exterior brick of the building.

Also included under this project was the installation of a new LED accent lighting system of the artwork located on the east and west fascia girders over East 125th Street. The new lighting replaced obsolete and inoperable incandescent and neon fixtures installed with the artwork in 2000. The 60 LED fixtures (30 east girder, 30 west girder) are controlled by a Crestron computerized programmable control center in the basement of the station building. A virtually infinite array of programmable lighting displays are available.

The project was advanced as an MTA Small Business Mentoring Program (SBMP) Tier II project. Construction was completed in September 2018 and was followed by start-up and commissioning of the LED lighting.

SIMCO supported the constructability review team for civil/utilities/MPT for the rehabilitation of the Canarsie Line between Manhattan and Brooklyn. The Canarsie Line is located under East 14th Street in Manhattan, the East River, and North 7th Street in Brooklyn.

The station complex, constructed in 1897, has a New York State Historic Preservation Office (NYSHPO) Opinion of Eligibility for listing on the National Register of Historic Places.

The Canarsie tubes were heavily damaged by brackish river water flooding after Superstorm Sandy in October 2012. Due to the extensive damage to the tunnel infrastructure, including power, signals, and communications, NYC Transit determined that a comprehensive rehabilitation was required to restore the tunnel to modern standards and meet significant increases in ridership. The project also included NFPA 130 life safety egress upgrades and Americans with Disabilities Act (ADA) upgrades, including elevators. These enhancements will be constructed at the First Avenue Station in Manhattan and the Bedford Avenue/Driggs Avenue Station in Brooklyn.

In addition to the tunnel rehabilitation, a new traction power substation will be constructed at East 14th Street and Avenue “B” in Manhattan to support service enhancements.

SIMCO’s role was to review and make design recommendations for civil, utility, and MPT staging and logistics. SIMCO provided input relative to utilities relocation, including staging consistency. Critical utilities within the work area in Manhattan that required temporary support and protection included electric oil-o-static lines and steam lines.

SIMCO reviewed the maintenance of local land access during construction, including the relocation of service road ramps on East 14th Street, and maintenance of emergency access. Traffic mitigation measures to facilitate motor vehicle and pedestrian movement while offering the contractor adequate construction staging, operations and laydown areas were examined.

SIMCO performed field review, utility investigations and design services for the maintenance and protection of traffic (MPT) for the retro-fitting of points of water egress into the subway system.

This project includes field identification and inspection of TA manholes and pullboxes, stairways and ventilation grates at the street level at nine subway stations, and two facilities, the Hunter’s Point Portal and the Richardson Avenue Fan Plant.

Responsibilities included coordination with the NYCT CPM and Cable Groups, field measurement of utility and ventilation grates for retrofitting, inspection of the manholes for power and communications cables, ducts, conduits and other sub-surface penetrations for plugs to prevent water intrusion.

SIMCO conducted detailed inspection and photo documentation of all TA street hardware for use by the designers.

SIMCO prepared MPT plans, including General MPT Notes; typical details for long term, stationary, and moving construction operations; and sections and key plans for the implementation of the flood mitigation measures. SIMCO’s responsibilities also included coordination with NYCDOT Office of Construction Coordination and Mitigation (OCMC) and other stakeholders as necessary for MPT review and Traffic Stipulations.

This was a project under the NYC Transit’s Superstorm Sandy Term Agreement to mitigate the impacts of flooding and salt water on TA facilities during future major storm events.

SIMCO provided site, civil, and utility design services for the construction of three traction power substations along the Metro-North Hudson Line in Riverdale, Tarrytown, and Croton. The sub-station replacements were needed to address damage from Superstorm Sandy.

The civil designs incorporate new FEMA 100-year Advisory Base Flood Elevations (ABFE) and MTA adjustments to address potential future storms and tidal surges. The new sub-stations are raised approximately 6 feet above the existing grade as a resiliency measure against future storms.

SIMCO’s role in the design effort for this project is to provide all civil engineering design and construction support services, which are on-going.

Design activities included:

  • Analysis and recommendation of the proposed elevations of the new substations in accordance with updated 100-year FEMA ABFE and MTA adjustments for tidal surge
  • Location analysis and discipline coordination for the design of a new Crews’ Quarters with office, conference room, lavatory, locker, and shower facilities
  • Coordination with mechanical and plumbing disciplines relative to water service and treatment of effluent
  • Alternative sub-station location analysis
  • Design of 180 linear feet of variable height Gabion basket retaining wall
  • Final Contract Plans and Specifications, including multi-discipline coordination
  • Site grading, drainage, soil erosion, and sediment control
  • Parking analysis and final layout for the Riverdale Station commuter parking lot to minimize the impact of a reduced number of commuter spaces during staged reconstruction and final parking lot configuration
  • Construction Phase Services