Orange & Rockland Gas Line Replacement – New York State Route 17

Tectonic performed a topographic survey of approximately 6,900 LF of roadway along New York State Route 17 in Sloatsburg, NY. The survey was used for the design of the replacement of an existing old gas line.

Route 17 is a major commuter road with heavy traffic volumes in the morning and early afternoon. Due to this high volume of traffic, Tectonic used its Mobile LiDAR Mapping system to collect topographic data at posted highway speeds without risking survey personnel in traffic to obtain the data. The base data was collected during a two-hour time span between times of heavy commuter traffic. Control was set using GNSS receivers linked to the NYSDOT Continuously Operating Reference Station (CORS) network to assure and check the accuracy of data obtained. The data gathered by our Mobile Mapping system exceeded the accuracy requirement. All maps were field checked by survey crews to ensure completeness, and final maps were produced using AutoCAD Civil 3D. Additionally, field crews measured inverts of drainage and sanitary sewer structures and incorporated the measurements in the final mapping.

Tectonic worked with the County of Suffolk to provide mapping and surveying services for the County’s wastewater infrastructure before and after Hurricane Sandy. The mapping provided was performed using GPS receivers with Real Time Kinematic (RTK) capabilities. The data was presented in the Environmental Systems Research Institute’s (ESRI) GIS format for inclusion in the County’s GIS system. Additional surveying services Tectonic provided include measurements and inspection of the structures to ascertain the condition and direction of flow of the system, and creation of individual reports for each structure that were submitted and “hot-linked” to allow the end user to pull up the reports while viewing the GIS. Tectonic’s survey crew successfully worked through minor scheduling setbacks due to the impacts of the hurricane.

Tectonic provided surveying services as a subconsultant for the Brookfield Manhattan West mixed-use development project in the Hudson Yards District of Manhattan, specifically 3 Manhattan West, a 67-story luxury residential tower, features 844 apartments slated to open in 2017.

Tectonic has provided the following services:

• As-builts of all the concrete in the building, which include the flatness of all floors, plumbness of the core wall and location of the slab edge.
• Measurements on all floors performed three times on each floor: post pour, immediately after the concrete is poured; post stripped, immediately after the forms are removed; and post shoring removal, immediately after the shoring is removed.

Tectonic’s survey crew has excelled at keeping pace with the ongoing construction to make sure all sets of measurements were taken on each floor.

The development project as a whole will include 7 million square feet of premier office, residential, retail and open space all located in a total of 5 buildings. A central plaza will provide open space with arts and events for tenants and the community.

Tectonic has provided, and is currently providing, surveying services to the New York City School Construction Authority (NYCSCA) at multiple school locations throughout the five boroughs in New York City. The surveys will be used for the design and construction of new school buildings and additions. Tectonic performs primarily detailed topographic and boundary surveys of these sites and prepares mapping in AutoCAD format showing all the improvement and utilities on and adjacent to the property. All surveys are tied to the coordinate system and datum in use in the borough the project was located.

Tectonic has performed surveys on over 150 new and/or existing school sites, and provides additional services including construction support and monitoring for settlement and movement of existing structures. As with prior contracts held with the NYCSCA, Tectonic is highly capable of completing the work at a very aggressive schedule.

Tectonic has provided, and is currently providing, surveying services at Stewart International Airport to the Port Authority of NY & NJ, as part of a capital improvement plan to expand the airport.

Tectonic performed multiple surveying tasks including:

• ALTA/ACSM Land Title Survey for the acquisition of the property.
• Mapping of lead-in lines, airside utilities and the existing weather information power line in the area of the main taxiways, utilizing a combination of GPS (Real-Time Kinematic) and a Robotic total station to increase efficiency.
• Performing topographic surveys for portions of the existing parking areas and additional areas to be developed into new parking lots.
• Performing terminal gate mark outs, layouts of new containment lines for aircrafts and gates, and boring location surveys for the redesign of the airport runways.
• Staking out lease lines and runway safety zones in the area of construction.
• Scanning existing paper copies of utility plates to create a geocoded digital database of all utility information.
• Performing as-built surveys of various sewer manholes throughout the airport airside and landside for inclusion in the airports digital database.

Tectonic continues to provide support as the airport grows. All work performed met strict Port Authority mapping standards and used the coordinate system and datum established by Tectonic, making inclusion in the airports digital database a seamless exercise.