Linear Infrastructure Solutions
JMT’s expertise in water and wastewater engineering is rooted in our linear pipeline assessment and design proficiency. Our team of more than 25 certified professionals is highly skilled in PACP and MACP standards for sanitary sewer infrastructure. We take pride in delivering responsive and cost-effective solutions to our clients. Over 85% of our projects are secured through repeat contracts and referrals. We consistently receive high ratings from utility reviews and actively participate in local and national organizations to stay updated on the latest industry trends and advancements.
Water Main Design & Technical Review Contracts
Location: Montgomery & Prince George’s Counties, MD
Client: Washington Suburban Sanitary Commission
After designing several miles of pipelines, Washington Suburban Sanitary Commission (WSSC) selected JMT to review other consultants’ designs, recognizing our value and commitment to quality.
JMT has been providing engineering services for multiple water main designs and technical reviews under multi-year on-call contracts with the WSSC since 2014. Under these contracts, JMT has completed more than 200 water main reviews, covering 370 miles of 6- to 84-inch diameter pipe. JMT technical reviewers focus on WSSC workflow processes and ensure that the designs comply with WSSC design standards and water main design best practices. Additionally, JMT has designed several miles of 4- to 20-inch water main replacements, three large valve vaults, and 37 meter-vaults. This work has included water main design, surveying, subsurface utility designation, soil borings and testing, corrosion design, and maintenance and protection of traffic plans.
Small Diameter Water Main Replacements
Location: Baltimore, MD
Client: City of Baltimore Department of Public Works
Replacing cast iron mains nearly 100 years old, JMT developed construction documents in three separate packages totaling more than $28 million.
JMT was tasked by Baltimore to design approximately 12 miles of water mains, primarily cast iron, from the 1920s-1940s. The project involved inspecting more than 900 water meters to identify water house connection materials (copper or galvanized steel). JMT’s engineering services included as-built plan research, field investigations, four design memorandums, test pits, soil borings, right-of-way verification, topographic surveying, construction document preparation, traffic control plans, corrosion control design, detailed specifications, and cost estimates. JMT also coordinated with regulatory agencies for permits. Many water mains were relocated to avoid other utilities, reducing bypass piping needs during new main installation. Test holes were conducted to ascertain the location and depth of water mains at critical intersections.
Small Diameter Water Main Design Services On-Call
Location: Pittsburgh, PA
Client: Pittsburgh Water and Sewer Authority
The Pittsburgh Water and Sewer Authority (PWSA) selected JMT for six consecutive annual contracts, totaling more than $120 million in construction costs, to replace 28+ miles of aging water main (6 – 30 inches in diameter) infrastructure to improve reliability, hydraulic conditions, and water quality.
PWSA has consistently assigned their most challenging design areas to JMT based on our performance of delivering quality, cost-effective designs on time. Subsurface utility engineering services used ground-penetrating radar to locate subsurface utilities and test holes to determine depths, materials, and sizes. Surveys included street right-of-way plans, tree surveys by certified arborists, and temporary construction easements. Permitting and public outreach streamlined timelines and fees while complying with regulations. Key stakeholders included hospitals, schools, and commercial properties. Soil boring and geotechnical testing informed water main design, addressing corrosion control and rock excavation. Corrosivity testing guided pipe material specifications like zinc coating and V-Bio® polyethylene encasement. JMT developed traffic control plans tailored to site-specific conditions, accommodating both commercial and residential areas with long term and short term setups.
Water Main Engineering Design Services On-Call
Location: Cleveland, OH
Client: City of Cleveland, Division of Water
JMT has been working with the City of Cleveland, Division of Water (CWD) since 2021, designing water main replacements and developing standard details to improve water quality and reliability for its customers.
JMT made recommendations and subsequent modifications to 150 of CWD’s existing standard construction details. These recommendations and modifications involved updating construction materials, identifying best methods and practices for water main construction, adding details for new standard practices, and researching the requirements of regulatory agencies. Under several other tasks, JMT designed 14,300 LF of new water mains, ranging from 6 to 16 inches in diameter. These were installed in streets with poor pavement ratings, requiring both street reconstruction and water main renewal. The project included various site conditions – replacing service lines near large street trees, creating maintenance and protection of traffic designs for detours and temporary flagging on a four-lane road, designing a renewed main in a city parklet with commercial services, and detailed bypass piping for same-trench renewals. JMT also developed traffic control plans at 60% and 90% design stages, tailored to each site’s conditions and land use, including both long term and short-term setups.
Piney Branch & Woodley Atlas Sewer Rehabilitation
Location: Washington, D.C.
Client: DC Water
JMT applied various rehabilitation techniques to cost-effectively deliver solutions to DC Water’s dense urban and sensitive environments.
The Piney Branch Sewershed Rehabilitation project and SLRP-5 in Woodley Park and Atlas District involved rehabilitating 38,000 LF of sewer pipes from 8 to 90 inches in diameter, performing two open-cut point repairs, and installing 11 new manholes for access. Located in dense urban areas with key stakeholders like foreign embassies and large hotels, JMT evaluated various rehabilitation technologies based on performance, cost, and impact. Our design team recommended CIPP lining for sewers under 36 inches and spin cast geopolymer lining for larger pipes to minimize traffic disruption and bypass pumping. The geopolymer liner also minimized bypass pumping requirements for the large diameter combined sewer system. JMT obtained all the required Department of Consumer and Regulatory Affairs (DCRA) and DDOT public space permits, NPS permit, soil erosion, and maintenance of traffic permits.
Improvements to the Jones Falls Sewershed Collection System
Location: Baltimore, MD
Client: City of Baltimore Department of Public Works
JMT delivered a multi-phased approach, working with local minority partners, that led to more than 20 miles of rehabilitated sanitary sewer assets under the City’s Consent Decree.
JMT was responsible for designing improvements recommended by the Jones Falls Collection System Evaluation and Sewershed Plan under the Consent Decree. As an initial step to preparing a Design Memorandum Report (DMR), JMT analyzed 123,000 feet of CCTV data covering 7,058 lateral connections and 600 manhole inspection reports. The City divided the construction into two separate efforts involving 119,400 LF of CIPP lining for pipes ranging from 8 to 27 inches in diameter, 620 LF of pipe bursting, 2,445 trenchless lateral rehabilitations, and 620 manhole rehabilitations. The JMT design team carried out comprehensive field investigations, including topographical surveys, test pits, and soil borings for pipe-bursting areas. For trenchless rehabilitation and short open-cut point repair areas, plans were prepared using GIS base maps, followed by site visits to collect necessary information for traffic maintenance plans, pavement restoration details for open-cut repairs, erosion and sediment control details, and detailed cost estimates. Obtaining jurisdictional agency approvals required environmental site investigations and plans, the preparation of 16 applications and letters, and meticulous tracking and coordination. Before construction, right-of-entry (ROE) agreements were prepared for more than 300 properties affected by, or requiring access for, contractor rehabilitation work. JMT also prepared presentation materials for two community meetings.
Zekiah Area Rehabilitation Design
Location: Baltimore County, MD
Client: Charles County Department of Public Works
JMT used internal service departments to meet strict deadlines for complex sewer rehabilitation designs in roadways and environmentally sensitive areas as required by the County’s Consent Decree.
The Mattawoman I/I Study identified the Zekiah Area as the first of several rehabilitation project areas since it was one of the most severe contributors of wet weather infiltration and inflow (I/I) to the Mattawoman Wastewater Treatment Plant. Further sewer system evaluation survey (SSES) inspections confirmed the presence of significant defects and failures within the sewers and manholes that contributed to the high I/I peak flows. Engineering and design services included the detailed analysis of CCTV and manhole inspections, additional temporary flow monitoring within portions of this system area, and a selection of rehabilitation methods and technologies. The design included 3 miles of 24-inch diameter CIPP lining, open cut repairs, and structural manhole lining. Our team performed the rehabilitation designs, as well as the topographic surveys, utility designation, deed research, wetland delineations, and environmental permitting.
Orems Sanitary Sewer Improvements
Location: Baltimore, MD
Client: Baltimore County Department of Public Works
JMT utilized various internal service departments to complete complex sewer rehabilitation designs in roadways and environmentally sensitive areas under stringent deadlines associated with the County’s Consent Decree.
JMT designed the rehabilitation of 217 pipe segments (8 to 48 inches in diameter), including 36,550 LF of CIPP lining, 12 open-cut point repairs, 276 LF of sectional CIPP liners, 97 lateral repairs, 2,584 VLF of structural manhole lining, and seven new manholes. Most sewers were in roadways, but some segments near waterways required Maryland Department of the Environment (MDE) permits for trenchless rehabilitation. We also completed 4,200 LF of CCTV inspection and 21 manhole inspections per PACP and MACP standards to meet Consent Decree requirements.
Under another task, JMT designed 2,300 LF of 42- and 48-inch sewer main in a forested area north of Eastern Boulevard with significant standing water. Due to unknown water sources and permitting requirements, these pipes were separated from the main project for design and permitting. The project focused on accessing environmentally sensitive areas to rehabilitate three pipes and five manholes, including 2,300 LF of CIPP lining, 24 vertical VLF of cementitious manhole lining, and 38 VLF of epoxy manhole lining. JMT coordinated with MDE, MDOT, Maryland Aviation Administration, and Baltimore County Soil Conservation District (SCD) to design access roads and replanting plans that met all wetland disturbance and rehabilitation requirements. A Joint Permit Application was submitted to MDE and the US Army Corps of Engineers due to wetland impacts.