A variety of foundation systems were also used to help the contractor adapt to unforeseen subsurface conditions during construction. The at-grade trail sections use pervious concrete pavement to minimize impacts within the stream buffer and reduce stormwater flows. Kimley-Horn’s design used a combination of at-grade paved trail and elevated boardwalk to minimize fill in the floodplain and provide an accessible route through the steep, rocky terrain. To the south, the segment will eventually connect with the Atlanta BeltLine.Ĭonstructed along Rottenwood Creek, the project faced multiple challenging constraints including a narrow floodplain, a thick, mature tree canopy, a Cobb County trunk line sewer, and an existing transcontinental gas pipeline. The Segment A northern trailhead was designed to accommodate future segments to the north, which ultimately will provide bicycle and pedestrian connectivity to communal and educational facilities. The design includes sustainable design solutions such as open concrete paving to mitigate impacts to the Rottenwood Creek stream buffer and no net fill in the FEMA 100-year floodplain to mitigate impacts to adjacent and downstream properties. The structural boardwalk, consisting mainly of steel and concrete elements for long-term durability and to reduce long-term maintenance costs, was planned and designed to coordinate with a sanitary sewer line that runs along the creek. Several scenic views of the creek and surrounding forest complement the trail and natural environment. The trail has long sections of elevated structural boardwalk to avoid impacts to the Rottenwood Creek floodplain. Kimley-Horn also worked with the Cumberland CID to obtain a Public Lands Highways Division grant, which helped fund right-of-way acquisition and construction costs. Kimley-Horn was the prime design consultant for the one-mile extension of the Bob Callan Trail, providing concept development, environmental documentation, stream buffer permitting, construction plan preparation through the GDOT Plan Development Process, and a Conditional Letter of Map Revision. In addition to uncovering a formerly hidden creek and creating a pedestrian refuge, the trail also provides a recreational amenity for the many residential neighborhoods surrounding the Chattahoochee River and Rottenwood Creek.
As an extension of the existing two-mile Bob Callan Trail managed by the Cumberland Community Improvement District (CID), this one-mile addition increases pedestrian and bicycle connectivity for the surrounding communities. Kimley-Horn provided geometric roadway and structural design, FEMA floodplain coordination, and NEPA documentation for a one-mile extension of the Bob Callan Trail in Cobb County, Georgia.
Located near multiple businesses and multifamily residences, this project provides an access point to thousands in the Cumberland Community. The Bob Callan Multiuse Trail Phase II, Segment A project uniquely combines safety, sustainability, and accessibility, allowing users to experience a beautiful urban stream that was previously hidden to the public by surrounding commercial developments.
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