Civil engineering is the profession that designs and constructs public works. SHN’s civil engineers design and build water and wastewater systems, prepare project sites, improve transportation, manage construction, and perform special inspections.
SHN extends the profession by pursuing new methods and technologies; for example, SHN is a leader in trenchless technologies, mechanically stabilized embankments, and Low Impact Design (LID).
- Trenchless technologies allow us to maintain or install water and sewer piping with minimal ground surface disturbance. Rivers, estuaries, wetlands, and other sensitive environments, and roads and structures, can be left undisturbed while piping is replaced and/or installed below.
- Mechanically stabilized embankments (MSEs) are stabilized slopes that allow the use of onsite soil in construction of massive retaining structures, greatly reducing costs compared to conventional retaining walls. MSEs can also decrease a project’s footprint, which limits environmental disturbance and often saves the energy and costs of moving tons of earth and rock.
- Low Impact Design (LID) “is an approach to land development (or re-development) that works with nature to manage stormwater as close to its source as possible” (EPA 2015). SHN water resources engineers have designed and constructed vegetated swales, bioretention swales, ponds and wetlands, permeable pavement, and other natural buffers between sensitive habitat and development.
The following is a partial list of SHN’s civil engineering services:
Water and Wastewater:
- System evaluations, master plans, engineering feasibility
- Water source supply, treatment, storage and distribution networks
- Wastewater collection, treatment and disposal plans
- Trenchless technologies, including Horizontal Directional Drilling (HDD)
- Grading and drainage plans, land development (subdivisions, commercial, industrial)
- Construction plan review
- Coastal infrastructure
- Mechanically stabilized embankments (MSEs)
- Flood control and drainage design
- Low Impact Design (bioretention swales, ponds and wetlands, permeable pavement)
- NPDES Permits, discharge to water permitting; see Planning & Permitting, and Environmental Services (Compliance and Pollution Prevention)
- Road and street design
- Traffic calming studies and plans
- Parking, circulation and flow improvements
- Engineer of Record and Resident Engineer responsibilities
- Bidding and contract award assistance
- Contract administration
- Post-construction services, such as long-term mitigation monitoring, warranty period assistance, and record drawings