National Institute of Standards (NIST) – 5MW Solar Farm

Tectonic performed geotechnical, environmental, civil, and surveying services for the proposed 5 MW ground mounted solar installation on the campus of the National Institute of Standards and Technology (NIST) in Gaithersburg, MD. The details of the provided services are:

Geotechnical Engineering Services – Performed a subsurface investigation and geotechnical engineering analysis for construction site improvements. The purpose was to evaluate the subsurface conditions across the site and develop geotechnical recommendations for the design and construction of the roadway pavement sections and electrical manhole structures.

Civil Engineering Services – Performed civil design for the proposed solar system. Sediment erosion control, SWPPP, grading, and stormwater designs were included for the 5 MW system.

Environmental Engineering Services – Performed a Phase I ESA to characterize the environmental quality of the property through determining the likely presence (or not) of Recognized Environmental Conditions (RECs). This was performed in conformance with ASTM Practice E1527-13, in order to identify obvious and likely potential sources of contamination such as hazardous substances or petroleum products and assess general environmental conditions of the property.

Surveying Services – Tectonic was requested to provide additional surveying services because the array geometry and location changed requiring additional areas on the property to be surveyed. A topographic survey was performed for a 5 MW solar ground mount system for the new area required of the solar installation and prepared mapping in AutoCAD format. The mapping showed all visible improvements, roadways, structures, etc. with a 2-ft contour interval, and spot elevations on all flat surfaces and improvements, including rims and inverts on all sanitary and drainage structures. All vertical data was based on the North American Vertical Datum of 1988.

NASA John F. Kennedy Space Center Central Campus Solar Plant

NASA installed a 2 MW ground mounted solar plant generating capacity that connects to the KSC 13.2KV 60hz electrical grid at the John F. Kennedy Space Center in Merritt Island, Florida. The 1 MW array became part of NASA’s electrical distribution system. Tectonic provided civil engineering services including SWPP, a dewatering plan, grading and erosion and sediment control plans.

Project Challenges:
The location of the system was close to the coast line. The soils were corrosive and, with combination of the salt in the air, effected the electrical equipment. The system needed to be designed to take into consideration the air quality and flood zones.

Smith Cairns Carport & Rooftop 395 kW Solar Array Installation

Tectonic provided structural design, surveying, a subsurface investigation and geotechnical engineering analyses for the proposed carport and rooftop PV solar arrays to be installed at the Smith Cairns Ford car dealership at 900 Central Park Avenue in the City of Yonkers. The carport included a total of two (2) carports to be installed within the existing parking lot. This included determining the design load, performing an analysis to check the building supporting elements and examining the existing roof deck and connections to support the proposed solar installation. The solar installation will provide alternate power solutions to the Ford Dealership building resulting in cost savings as well as clean energy.

Black Oak Wind Farm

Black Oak Wind Farm, LLC, plans to construct seven 2.3 megawatt wind turbines built by General Electric, in total producing 16.1 megawatts, on approximately 1,000 acres of land. All electricity produced on the farm, which is enough to power about 5,000 local households, have been purchased by Cornell.

Tectonic provided geotechnical and environmental support services for the project consisting of the seven wind turbines and associated collector systems, a collection station, a substation and access roads. The investigation identified the engineering properties of the site soils and bedrock necessary for the design of the turbine foundations, electrical grounding and buried electrical transmission lines. These services included the preparation of the geotechnical components of the geology, soils and topography section and the groundwater components of the water resources section of the Draft Environmental Impact Statement (DEIS).

Test borings, Multi-Analysis of Surface Wave (MASW) testing, thermal resistivity testing, electrical resistivity surveys and laboratory soil testing were completed and a report with recommendations for the design and construction of the turbine and substation foundations was prepared.

Tectonic also performed a Phase 1 Environmental Site Assessment (ESA) for each of the seven wind turbine parcels spread geographically over the site and also conducted limited Phase II soil sampling to expedite screening for past agricultural practices to advance the project development schedule.

Mohave Solar Installation Design

Tectonic designed the steel structure and concrete foundation for a 24’ by 80’ by 16’ tall elevated canopy to support a photovoltaic solar panel array on the building. Additionally, Tectonic designed the building structure and foundation to house the batteries for the solar panel array. Geotechnical investigations and as-built drawing preparation are also being performed in order to obtain the necessary information to obtain a building permit for the site.

Multi-Disciplinary Services

Tectonic has a long standing relationship with Central Hudson having performed multi-disciplined services throughout the region over the last 16 years. As part of their Transmission and Substation electrical systems upgrades and improvements, Tectonic has provided the following services:

  • Third party field inspection services, for performance of gas & electric utility facility installation throughout the lower Hudson Valley region for contractors.
  • Civil and structural engineering services for the design of caisson foundations to support transmission lines and utility poles at the Catskill Substation.
  • Subsurface investigation and geotechnical evaluation for the proposed upgrades to the Central Hudson Gas & Electric (CHG&E), 11-mile, 69 kV SB transmission line located between Kingston and Saugerties, Ulster County, New York, and the 12-mile, 69 kV H transmission line located in Catskill, Greene County, New York.
  • Structural engineering services for the design of caisson foundations to support 2 transmission towers on the NW transmission line.
  • Geotechnical investigation and prepared a report describing findings and recommendations for the construction of two (2) steel transmission poles to replace existing wood pole structures on the WM line in Walden, NY.
  • Structural analysis and field investigation of an existing elevated concrete slab and the brick bearing walls supporting the slab within a historic power station building at the Montgomery Street Substation.

Port Jervis Substation Design

Under several contracts with Orange & Rockland Utilities, Inc., Tectonic performed design services for the replacement of a transmission/distribution substation spread across two sites. As part of the Substation replacement, Tectonic performed engineering services for pedestrian improvements, earthwork analyses, pavement replacement, and maintenance and protection of traffic (MPT) planning. Additionally, Tectonic provided coordination of drainage and retaining walls, site planning oversight, cost estimating, and engineering support.

Term Agreements

Tectonic has been working with Con Ed through various Term Agreements over the last 15 years. As part of their Transmission and Substation electrical systems upgrades and improvements, Tectonic has provided the following services:

  • Structural engineering services for more than sixty (60) of Con Edison’s transmission towers.
  • Geotechnical and Environmental engineering. Geotechnical and environmental services including: performance of subsurface investigations, laboratory testing, geotechnical and environmental analyses, report preparation and geotechnical instrumentation and monitoring services.
  • Controlled inspection and materials testing services for soils, concrete, masonry, asphalt, and structural steel materials, preparation of inspection reports and performance of on-site investigations.
  • Land and property surveys, title searches, ROW and easement surveys, topographic surveys, hydrographic surveys, including soundings, construction and quantity surveys, transmission surveys including subsurface or overhead electric, gas and steam lines, and route feasibility surveys and studies.

Danskammer & Roseton Power Plant Station Modifications

Two power plants located adjacent to each other on the west bank of the Hudson River in Newburgh, NY distribute power throughout the Hudson Valley. The 500 megawatt, 4-unit, coal-fired Danskammer Power Station and the 1200 megawatt, 2-unit, gas and oil-fired Roseton Power Station required several repairs. Under a 7-year term agreement, Tectonic provided on-call consulting engineering services for a multitude of task assignments. Tectonic performed structural analysis and design, structural inspections, load capacity evaluations, design of repairs to address existing conditions, accommodate new operational needs, and design of modifications and additions to various plant infrastructure.

Solar System Installation Design New York City

To provide clean renewable energy while reducing overall energy costs for various residential and commercial buildings throughout the five boroughs of NYC, solar photovoltaic system set ups were installed ranging in energy output from 50 KW up to 150 KW. Tectonic provided professional engineering design services for over twenty installations including framing layout, structural analysis and design of the solar mounting system, drawing preparation and building design.