Engineering

At CEM, we believe in providing long-term engineering solutions with lasting environmental impacts. Our standard of quality and technical proficiency go hand in hand with our commitment to providing innovative and affordable solutions to water conveyance challenges.

  • Engineering
Services We Provide:
Stormwater Management Pond Design
Cecil County Department of Public Works
North East and Perryville High Schools Stormwater Management Retrofit Design; Cecil County, Maryland

Project Scope

Cecil County Public Schools, assisted by the Cecil County Department of Public Works, obtained grant funding to design stormwater management facilities at two local high schools. The project at North East High School required a design to restore 500 linear feet of degraded stream banks. The project at Perryville High School required a design to retrofit a failing stormwater management pond. Additionally, two micro-biorention devices were also designed at each school.

Challenge

Design all features within the existing site constraints of each school while preserving the aesthetics of each campus environment.

Solution

With a commitment to proactive and transparent communication, CEM engaged the administation, students and maintenance professional at each school in the design process.

Community Impact

CEM’s designs resulted in reducing the amount of nitrogen and phosphorus entering the local waterways, which were identified as having a high priority for improvement in both the “Northeast River Watershed” and “Lower Susquehanna River and Furness Bay Watershed” assessments.

Relationship

CEM executed the work for this project in 2016.

Responsibility

Moderate ($10,000 < Budget < $100,000)

Erosion & Sediment Control Design
Maryland Transportation Authority (MDTA)
Erosion and Sediment Control Design along the Harbor Tunnel Thruway (I-895); Baltimore County, Maryland

Project Scope

In support of repair work for the Baltimore Harbor Tunnel, CEM prepared erosion and sediment control plans and details for slope stabilization areas within the existing MDTA right-of-way of I-895.

Challenge

Due to the high volume of traffic on I-895, CEM faced challenges in using traditional construction sequencing details for installation of stabilization features.

Solution

CEM worked with the client to develop an alternative sequence of construction that achieved the project goals without adding cost and maintaining the safety of drivers and construction workers.

Community Impact

Unstable slopes along this heavily traveled roadway can cause failure of the road substructure as well as pollute nearby receiving waters, thus early detection ad repair can save money and mimize adverse impacts to drivers and the environment.

Relationship

CEM began working with MDTA on this E&S Design project in 2015 and concluded the work in 2016.

Responsibility

High ($100,000 < Budget < $1,000,000)

Stream Stabilization & Remediation Design
Koren Development Company, Inc.
Moores Branch Stream Restoration Design; Green Spring, Baltimore County, Maryland

Project Scope

CEM prepared a design to restore 4,500 linear feet of degraded stream channel resulting from more than 100 years of operations at the former Green Spring Quarry. This work included designing a passive cold-water supply to downstream areas to improve trout habitat. CEM is now conducting the permit-required 5 years of post-construction monitoring to assess impacts to the stream.

Challenge

Multiple exposed sewer lines and privately-owned properties within the floodplain.

Solution

CEM first identified all project stakeholders, including a private school, and conducted multiple meetings to understand stakeholder needs for the project, and incorporate these needs, where practical, into the design to facilitate the permitting process.

Community Impact

In addition to improving downstream fish habitat, this project provided an opportunity for CEM to work with students from the adjacent school in preparing designs to eliminate stream blockages, reduce flooding of adjacent properties, and reduce sediment loads to the stream.

Relationship

This ongoing project with Koren Development Company, Inc. began in 2010.

Responsibility

High ($100,000 < Budget < $1,000,000)

ADDITIONAL SERVICES:
Green Infrastructure
Dam Safety Evaluations
Bridge Scour Analysis
Highlighted Clients
  • Maryland State Highway Administration
  • Maryland Transportation Authority
  • Washington Suburban Sanitation Commission
  • Cecil County Department of Public Works
  • Washington Gas Light Company
  • Maryland counties surrounding Baltimore and DC
  • Baltimore County Club
  • Koren Development Corporation