KCI provided site/civil engineering and builder services for this new residential development comprised of 74 townhomes. Engineers completed the initial layout, carried the project through the Baltimore County Phase 1 and 2 process, developed final engineering for the required infrastructure, and provided support services needed to build the townhouses.
Hunt Valley Overlook was one of the first large-scale developments in Baltimore County designed and approved under the state of Maryland’s 2007 stormwater management regulations requiring Environmental Site Design (ESD) to the maximum extent practicable. ESD in stormwater management aims to mimic existing drainage and infiltration patterns by managing stormwater where it is generated. This eliminates traditional large retention ponds. By using these techniques, KCI created a design that combined environmental sensitivity, smaller footprints, and more usable green space. At this site, engineers incorporated ESD practices and techniques that are more visually appealing and have a lower profile, including multiple micro-bioretention facilities and bio-swales to manage stormwater runoff. Although not required, KCI also provided quantity management for the 10-year storm.
In order to comply with the required amount of ESD facilities and targeted management of specific impervious areas (roofs, driveways and roads), KCI developed an intricate system of storm drain outfalls to ensure that water from specific areas went to specific facilities for treatment. The challenge for the designer was coordination of multiple separate drainage systems as well as the regular public utilities, all within a strip of land that at one point is only approximately 100 feet wide. Furthermore, the county allowed the use of an avant-garde system of micro-bioretention facility clustering. Developed by the reviewers at Baltimore County, KCI successfully implemented this concept in order to maximize buildable site area while still maintaining a full ESD system.
The existing topography along this narrow strip of land also created significant concerns. The property drops a total of 120 feet along its length and 30 feet along its narrow width. With York Road snaking along the east side and protected Forest Conservation Easements on the west, the challenge was to fit homes, open space, and supporting infrastructure within a very tight location while preserving the existing topography on both sides. In order to site townhomes in these steep conditions, KCI created a series of terraced house groups. Utilizing engineered slopes and some very large retaining walls (in excess of 30 feet high), engineers developed a layout that is visually appealing and also maximizes the available area for home sites.