CIVIL & STRUCTURAL ENGINEERING
LiRo-Hill’s Civil & Structural Engineering Division provides planning, design, and construction administration services that offer innovative, efficient, and cost-effective solutions for buildings, bridges, roads, and recreational facilities. We have a diverse portfolio which includes both new and renovation projects for a variety of clients. Our highly skilled staff combines technical expertise with real-world understanding of scheduling, construction challenges and operations. In conjunction with our in-house construction management, environmental, and architectural experts, we have the ability to serve a diverse clientele in a broad range of market sectors. Civil & Structural Engineering
Design Disciplines
Structural Engineering
Site/ Civil Engineering
Landscape Architecture
With a strong background in construction management, we factor constructability into all of our engineering designs and apply a practical, hands-on approach to effectively resolve design challenges.
Traffic Engineering
From state-of-the-art traffic modeling programs that allow live graphic simulations of future traffic patterns to the latest in 3D simulation software, LiRo-Hill engineers apply the right tools to meet our clients’ needs.
High Line Reconstruction
STRUCTURAL ENGINEERING
LiRo-Hill Services Bridge Design and Inspection: • Existing conditions survey and analysis • Design reports phases I-IV • Final design phases V-VI • Alignment analysis • Traffic modeling to determine future volumes • Highway realignment • Retaining wall design • Maintenance and protection of traffi c • Construction phasing
Vertical Structures: • Commercial buildings • Passenger stations • Electric power generation facilities • Transmission towers
Replacement of CR 16 Horseblock Road Bridge Suffolk County Department of Public Works
LiRo-Hill provided engineering services for the replacement of the 70-year old, four-span, steel framed bridge carrying Horseblock Road over both the Long Island Railroad and Long Island Avenue in Medford. Design services have included the development and evaluation of alternatives; survey; and design report (Phases I-IV). Required rerouting of traffic during the proposed staged demolition of the bridge was evaluated and coordinated with both the relevant agencies and the local community. Pending state funding appoval, design of the new bridge (Phases V-VI), and associated approach highway reconstruction, will proceed. All work will be performed in accordance with AASHTO and NYSDOT guidelines.
STRUCTURAL ENGINEERING
Palmer Road Bridge Westchester County Department of Public Works
LiRo-Hill is providing inspection and design services for the rehabilitation of the 100-year old Palmer Road Bridge over the Bronx River in Bronxville. The 50-ft-wide, single-span concrete arch bridge is listed on the National Register of Historic Places. After conducting an in-depth inspection of the structural components, and analyzing concrete core samples, LiRo- Hill documented conditions utilizing the NYSDOT Bridge Inventory and Inspection System for Hazardous Condition Assessment. Based on inspection and testing results, as well as a review of record drawings, a series of repair recommendations, including scour, erosion control, and MPT schemes, were developed. The approved schemes are currently in design.
Boardwalk Reconstruction City of Long Beach
In October 2012, Superstorm Sandy severely damaged this iconic 2.2-mile long boardwalk. LiRo-Hill immediately responded by performing a detailed damage assessment, developing alternative repair strategies, and preparing design documents. All wood support framing and decking, railings, lighting, and access ramps were replaced. Several resiliency features, including a continuous wave-break wall, will protect the boardwalk against future storm damage. The fast-track process enabled the construction schedule to dovetail with the release of individual design packages. LiRo-Hill was also Construction Manager for the project. A second project phase included the design and construction of new restroom and concession buildings. These prefabricated concrete structures are supported on piles at the elevation of the new boardwalk, and have been designed to evoke the classic Spanish Colonial style prevalent in Long Beach.
STRUCTURAL ENGINEERING
High Line Biennial Inspection New York City Department of Parks and Recreation
Located on Manhattan’s West Side, the elevated High Line is a unique, urban recreational venue created on a former 1930s spur for the New York Central Railroad. LiRo- Hill provided engineering inspection services to meet the requirements of the New York State Department of Transportation mandated biennial inspection, which includes inspection and structural inventory following the NYSDOT Inspection Manual and NYSDOT Bridge Inventory Manual guidelines, as well as applicable State and City codes. The scope included hands-on condition analysis and load rating calculations of all primary structural components; identification of hazardous conditions and provision of design recommendations and cost estimates for correction; and development of rehabilitation schemes to meet present day codes and standards.
Power Generation Clients Long Island and New York City
Since 2001, LiRo-Hill has provided engineering and construction inspection services to Keyspan, National Grid, and TransCanada on an as-needed basis and as an extension of staff at power generating stations on Long Island and in New York City. Assignments included:
• Foundation and steel platform inspection and design • Condition inspection of underground reinforced concrete gas regulator vaults • Inspection and design services for building facades, monorails, transformer slabs, and pothead structures • Structural repair design for utility support systems • Design of steel utility hangers suspended from pre-stressed concrete bridge • Onsite Extension of Staff for infrastructure and power plant facility improvements
SITE/ CIVIL ENGINEERING
LiRo-Hill Services • Roadway and highway design • Drainage and sewer systems • Stormwater management • Utility design and relocation • Site development
NYS 347 Reconstruction – Route 111 to Mt. Pleasant Road New York State Department of Transportation
LiRo-Hill is providing engineering services for a Design- Build contract to widen, repair, and rehabilitate a 1.2- mile long section of this four-lane commercial arterial highway in Smithtown, NY. The road will be completely reconstructed and widened with additional travel lanes, and will incorporate aesthetic traffic calming and complete streets features including raised center medians, bus stop improvements, sound walls, and solar LED lighting. A Greenway Stop with information kiosk, interpretive signs, shade structures, and seating will be installed. Extensive coordination with NYSDOT and with local businesses and residents has been essential to communicate project details and to mitigate construction schedule impacts.
SITE/ CIVIL ENGINEERING
Prospect Avenue Reconstruction Town of North Hempstead Department of Public Works
A key component of the New Cassel Revitalization Plan, this federally funded project improved a one-mile section of a busy commercial road. LiRo-Hill provided design and construction administration services. The scope included traffic calming improvements; dedicated bicycle lanes; raised medians; ADA-compliant crosswalks and curb ramps; decorative streetscape elements; and a pocket park. The improvements create a more favorable environment for residents and business owners by encouraging pedestrian and bicycle traffic. The design located all new construction within the Town right-of-way, avoiding the need to prepare acquisition or easement maps. Extensive coordination with utility companies to minimize conflicts, as well as the development of MPT plans, contributed to project success.
NYS Route 112 Reconstruction – Granny Rd. to NYS Rt. 25 New York State Department of Transportation
LiRo-Hill provided preliminary and final design (Design Phases I–VI) for this project to improve safety and capacity needsandaddresspavementdeficiencieswhileminimizing right-of-way acquisitions. Turn lanes and landscaped raised medians were located within the existing right-of- way. Pavement and sidewalk rehabilitation, drainage improvements, traffic signals, and bike lanes were included. Detailed work zone traffic control plans were developed in order to safely and efficiently perform the construction within the narrow project confines. Coordination with two highway work permits, and reconnection of numerous private properties added complexity to the project.
SITE/ CIVIL ENGINEERING
Essex Court Area Drainage Investigation Town of North Hempstead Department of Public Works
LiRo-Hill performed survey, design, and construction inspection services for approximately 0.8 miles of this residential area of Port Washington. The area was repeatedly flooded due to a high water table and underground streams. A complete drainage study of existing conditions, generation of a drainage master plan, design of drainage improvements by mitigating inadequate and sub-standard conditions, and a hydrological evaluation of the proposed system were conducted. French drains were connected into a positive drainage system to prevent flooding and wet conditions. The project also included the reconstruction of pavement, concrete curbs, driveway aprons, and sidewalks, and pavement markings. Due to the limited options available for entering and exiting the court neighborhood, precise MPT considerations were maintained throughout construction.
Various Engineering Assignments Westchester County Airport
LiRo-Hill has provided a variety of civil engineering services at this busy regional airport. Work has included access road and parking field design, drainage analysis, utility relocations, pavement markings, MPT, lighting analysis, and development of phased construction plans to minimize disruptions of vehicular traffic. During the redesign of the Perimeter Road, located adjacent to a watershed, LiRo- Hill prepared a Notice of Intent and Stormwater Pollution Prevention Plan, for erosion and sediment control during construction as necessary to obtain NYSDEC approval. For a separate utility relocation task, LiRo-Hill developed a fully functional GIS database incorporating both current survey information and historical data.
LANDSCAPE ARCHITECTURE
LiRo-Hill Services • Site development • Natural and synthetic turf playing fields • Sports courts • Passive recreation areas • Playgrounds • Bio-swales and bio-basins • Sea walls, piles, docks, and boardwalks
Borella Farm Fields Town of Oyster Bay Department of Public Works
LiRo-Hill provided design and construction inspection services for the creation of this 10-acre park in Bethpage. The multi-use sport facility contains baseball, little league, and softball fields, with associated dugouts, scorer’s booths, bleachers, scoreboards and fencing. A soccer/ multi-use field with bleachers, as well as a prefabricated concrete restroom building, parking, and site amenities complete the plan. Extensive grading and tiered retaining walls extending up to a 21 ft height were required to address the steeply sloped site. The residential location necessitated careful dust and noise control, and ongoing community interface to communicate project details and address resident concerns. The project was completed on a fast-track design build schedule.
LANDSCAPE ARCHITECTURE
Field of Dreams Sports Facility Town of Oyster Bay Department of Public Works
This well used Town recreational facility provides fields for soccer, football, and lacrosse events. LiRo-Hill completed design and construction inspection services for the project. Above ground utilities and poor site drainage presented major design challenges. The new fields were constructed with a modified soil structure which allowed for increased vertical drainage of rain water. Utilities were relocated underground to permit unimpeded construction. The final plan included on-site parking, extensive landscaping, prefabricated buildings, basketball courts, playgrounds, and walkways. During a subsequent project phase, LiRo-Hill designed a turf system consisting of a 50/ 50 mix of sand and rubber crumb infill in place of the initially installed natural grass.
Shell Creek Bulkhead Rehabilitation Town of Hempstead Department of Parks & Recreation
The existing 1,750 ft long steel bulkhead protecting the shoreline of Shell Creek Park showed signs of deterioration after 40 years of service. LiRo-Hill performed a survey to determine the extent of the damage. Test pits exposed the existing tie rods and deadmen for inspection. Although areas of the steel pile had lost section, it was determined that the bulkhead could be refaced and that a complete replacement would not be required. A restoration design, incorporating cathodic protection to extend the service life of the steel sheeting, was developed. The project included replacement of the asphalt walkway bordering the bulkhead, a continuous safety railing, and a new gazebo looking out toward Reynolds Channel. Coordination with NYSDEC was required for project approval and permitting.
LANDSCAPE ARCHITECTURE
Theodore Roosevelt Memorial Park Improvements Town of Oyster Bay Department of Public Works
LiRo-Hill prepared a master plan, developed design documents, and provided construction inspection services for the restoration of this early 20th century park. Due to consistent flooding and incompatible prior renovations, the design aesthetic of the park had been severely compromised. The project addressed drainage issues and reconnected the park to the adjacent commercial district. A new elevated synthetic turf soccer field spans over storm- water leaching chambers, and a bioswale now improves onsite water retention. The deteriorated seawall was stabilized by installing a reinforced fiberglass cantilevered bulkhead and resetting the original stone facing. New walkways, period lighting, and selective tree removal and planting have restored the intent of the historic Memorial Area landscape plan.
Neighborhood Parks Upgrades Town of Hempstead
LiRo-Hill provided design services, under several contracts, for improvements to 10 neighborhood parks located throughout the Town. A portfolio of standard park elements were developed to tie the sites into a unified park system. The design program emphasized universal and sustainable design and ease of maintenance of the facilities. The scope for each park was unique, including a combination of the following items: grading and drainage improvements; pavement and walkway replacement; installation of playground equipment, sports courts, picnic tables, seating, and passive areas; lighting improvements; fencing; spray pools; and irrigation systems. Designs included adherence to ADA guidelines, and the utilization of a non-invasive plant species program.
TRAFFIC ENGINEERING
LiRo-Hill Services • Traffic planning and operational studies • Data collection and management • Capacity analyses and impact assessments • Corridor and network studies • Accident investigations and safety studies • Signal timing and optimization plans • Traffic signs and pavement marking plans • Traffic signal design • Traffic calming studies and design • Pedestrian and parking studies • Mitigation measures and alternative plans • Maintenance and Protection of Traffic (MPT) and detour plans • Construction staging, cost estimating and specifications • Traffic simulation and modeling • GIS applications
Grand Avenue Traffic Study Nassau County Department of Public Works
The Nassau County Infill Redevelopment Feasibility Study recognized the area surrounding the LIRR Baldwin Station, including the Grand Avenue corridor, as suitable for redevelopment through strategic mobility improvements. The mix of land uses, existing commercial street wall and proximity to the station provide the fabric for a vibrant downtown and central business district. LiRo-Hill prepared a traffic and complete streets study for the area. The primary study goal was to identify traffic calming measures and improvements that will provide a safer pedestrian environment, improve circulation and serve as a catalyst for economic development, leading to the revitalization of downtown Baldwin.
TRAFFIC ENGINEERING
Traffic Safety Improvements for Three East River Bridges New York City Department of Transportation
LiRo-Hill improvement recommendations for roadways, approaches, and ramps at the Manhattan, Williamsburg, and Ed Koch Queensboro Bridges. Extensive data was collected to quantify existing conditions, traffic volumes, vehicle classifications, accident history, operating traffic speeds, traffic control devices, clearances, and profiles. developed traffi c safety Data obtained were critically reviewed and analyzed to determine appropriate safety measures including speed limits, warning sign requirements, and advisory speeds along critical sections. Schematic plans were developed to show the proposed improvement measures. All analyses were conducted in accordance with the National Manual on Uniform Traffic Control Devices (MUTCD) and the New York Supplement, as well as applicable NYCDOT, NYSDOT and AASHTO guidelines.
Modeling Services for Times Square New York City Department of Transportation
Reconstruction of 7th Avenue and Broadway from 41st to 48th Streets in Manhattan required lane closures in the streets surrounding Times Square, one of the busiest areas in New York City. In order to study the system-wide traffic impacts and evaluate mitigation measures during construction, LiRo-Hill modified and calibrated a subarea simulation network, based on the existing Manhattan Traffic Model (MTM) in AIMSUN platform, to develop feasible mitigation measures, MPT, and detour plans. MTM is an extensive microscopic simulation model utilized by NYCDOT for various traffic analyses related to ongoing infrastructure projects. The AIMSUN model exhibits heavy vehicular and pedestrian flows and their interaction and congestion causing conflicts.
TRAFFIC ENGINEERING
County Route 80 Traffic Engineering Services Suffolk County Department of Public Works
LiRo-Hill completed preliminary and final design (Phases I-IV) for improvements to a 1.7-mile section of this heavily travelled Suffolk County arterial. Several alternatives, including maintaining the existing roadway configuration, widening the roadway, and installing roundabouts and raised medians, were studied. Future traffic projections were made by extrapolating data from the NYSDOT LITP 2000 Trans Plan Model. Traffic analysis was completed utilizing HCS and SYNCHRO software programs; VISSIM and RODEL were utilized to study the roundabouts and to generate animated traffic simulations of existing and future conditions. The final design included pavement rehabilitation; positive storm drainage systems; intersection improvements; traffic signal replacements; and concrete curbs and sidewalks.
Traffic Engineering Services at NY & NJ Airports Port Authority of NY & NJ
LiRo-Hill has provided traffic engineering services at LaGuardia, John F. Kennedy, Newark, and Stewart Airports on an as-needed basis since 1999. Assignments have included: • Exit roadway signing evaluation • Parking garage egress ramp analysis • MPT program development • Evaluation of traffic control devices • Sign service request preparation for signs, pavement markings, and delineation devices • Parking lot design • Speed and delay studies
• Accident analysis • Pedestrian studies • Variable message sign design
Our Relationships
We take pride in the long-standing relationships that we have built with our clients. Their project needs are of paramount importance to us, and our commitment to meet their goals has led many of them, including major agencies and municipalities, to repeatedly choose us for their programs and construction management projects. Some of these prominent clients include:
New York City Department of Transportation New York State Department of Transportation MTA – Long Island Rail Road New York City Economic Development Corporation Lower Manhattan Development Corporation Port Authority of New York and New Jersey New York City School Construction Authority Nassau County Department of Public Works Suffolk County Department of Public Works Westchester County Department of Public Works Town of Oyster Bay, NY
T own of Hempstead, NY Town of Huntington, NY Town of North Hempstead, NY Town of Brookhaven, NY City of Long Beach, NY Village of Massapequa Park, NY Village of Farmingdale, NY Village of Port Jefferson, NY SUNY Stony Brook Brookhaven National Laboratories Keyspan / National Grid
Integrated Services, One Objective: Client Satisfaction
Since our founding in 1983, The LiRo-Hill Group has provided construction management, engineering, and architectural solutions for public and private sector clients who value responsiveness and professionalism. Maintaining a network of offices in the Northeast and on the West Coast, our multi- disciplined staff coordinates closely with our clients to define project requirements and to proactively meet project goals.
LiRo-Hill offers the following core capabilities:
• Program & Construction Management • Resident/ Construction Engineering & Inspection • Environmental Services • Civil & Structural Engineering • Mechanical, Electrical, & Telecom Engineering • Architecture & Sustainable Design
• Disaster Response Services • Virtual Design & Construction
Our technical professionals collaborate across divisions to deliver fully integrated services that benefit our clients. Our designers provide a construction-based approach that encourages the development of creative yet practical solutions to real world construction challenges. Our construction managers and inspectors draw on that expertise to deliver successful projects.
NEW YORK CITY T 212.563.0280
BUFFALO, NY T 716.882.5476
BOSTON,NY T 617.723.7100
SYOSSET, NY T 516.938.5476
Visit us at www.LiRo-Hill.com Connect with us
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