Satisfying Several Stakeholders
Century successfully managed the coordination of a larger-than-usual group of key stakeholders over the course of the project, working with the Anne Arundel County Department of Public Works, the Army Corps of Engineers, the Maryland Department of the Environment, the developer, the bridge contractor, and several other companies and agencies.
Impactful Subsurface Evaluations
Geotechnical engineering services consisted of 24 test borings, laboratory testing, geotechnical evaluation and preparation of a geotechnical report for the proposed bridge, culvert and stormwater management facilities. When it was determined that the use of shallow foundations for support of the bridge abutment and piers would result in estimated settlements of two to four inches, Century recommended non-displacement driven pile foundations instead. It was also recommended that the bridge culvert foundations be lowered and supported on a stiff clay layer, designed for an allowable bearing pressure of 4,000 pounds per square foot.
Environmentally-Friendly Design
Despite the presence of several sensitive environmental features in the 130-acre wooded project site, the new roadway is minimally invasive and was designed with preservation in mind. Several stormwater management facilities along both sides of the new roadway greatly reduce the project’s potential negative impact. Even when the originally-planned 150-foot bridge was shortened just prior to construction, Century’s redesign avoided any additional impact to the surrounding wetland.
Project Facts
Owner
Anne Arundel County Department of Public Works/The Halle Companies
