Phase I, Dulles Metro Rail

    This project involved the design and construction of a 23.1-mile extension of the existing 103-mile long WMATA rail system. Upon completion, Dulles Metrorail will provide high-quality, high-capacity transit service in the Dulles Corridor. New Metrorail service in the corridor will result in travel time savings between the corridor and downtown D.C., expand the […]

Carter G. Woodson Park

This project involved the construction and improvement of an existing park located on the triangle formed by the intersection of Rhode Island Ave, 9th St, and Q St NW in Washington, DC. Several large trees surround the park along Rhode Island Street NW and 9th Street NW, while smaller trees are planted along Q Street NW. The site is flat and has an elevation of EL 81 ft.  The construction consisted of improving the park with a statue and memorial honoring Carter G. Woodson at its center.  In addition, paver sidewalks were installed, along with a rain garden to serve as an infiltration facility for the site.


DMY’s scope of services included reviewing project information, obtaining the drilling permit from the DCRA and DDOE for field work, drilling borings and performing field infiltration tests in the cased borehole, evaluating field infiltration testing data and preparing a report.


Project Location – Washington, DC
Project Owner – District of Columbia Department of Parks & Recreation
Project Client – Lee & Associates, Inc.
Project Completion – 2013











DC Water – Biosolids Management Combined Heat and Power Plant

The Combined Heat and Power (CHP) project will make the Blue Plains Advanced Wastewater Treatment Plant (AWTP) the first in North America to use biogas from an AWTP facility.  The design-build portion of the CHP project is for $81 million and, upon completion; it will produce at least 14 MW of electric power that will supply the Blue Plains facility with nearly 30 percent of the AWTP’s average power demand. This is equal to the electricity required to power more than 8,000 homes.


The plant will also include three Solar Mercury 50 low nitrogen oxide gas turbines, digester gas cleaning and compression equipment, heat recovery steam generators, duct burners, a backup boiler, and electrical equipment needed to operate in parallel with the utility grid and ancillary systems.


DMY is currently working on this project providing special inspection and construction materials testing services which include field and laboratory testing for soil and aggregate, concrete and grout sampling and testing, and inspection of the installation of auger-cast-piles.  Structural steel inspection is also a major part of special inspection services.


Project Location – Washington, DC
Project Owner – DC Water
Project Client – PEPCO
Project Completion – 2013










Simon Elementary School

This project used geotechnical engineering services to support the design of the Simon Elementary School Playground project in Washington DC.  The new features included two rain gardens, two bioswales, pavement areas, trails and an amphitheater. A total of seven infiltration tests were conducted for the rain gardens and bioswales. Infiltration test borings were drilled to about two feet below the anticipated facility bottom to perform the field infiltration tests. DMY also drilled four soil test borings varying from 5 to 10 feet in depths at the pavement and amphitheater locations.  Subsurface soil/rock and groundwater conditions were obtained at each of the boring locations. Standard Penetration Tests (SPT) were conducted in all the borings to check for soil strength.


DMY provided geotechnical engineering services on this DGS/DDOE/DCPS pilot program.  As part of initiatives to rehabilitate local rivers, Simon Elementary School Playground renovation project served as a pilot showcasing opportunities for marrying play and sustainability. The proposed construction reduces pavement and introduces rain gardens for cleansing and infiltration, and incorporates a variety of play features including a basketball court and hard surface play areas, play equipment, and climbing mounds.



Project Location – Washington, DC

Project Owner – DC Public Schools

Project Client – LandDesign, Inc.

Project Completion – 2013