The Alpharetta City Council has approved spending $407,425 to have its on-call engineering consultant design the Big Creek Greenway extension from the trail’s current terminus at Marconi Drive north to Union Hill Park on the Fulton-Forsyth county line.
The council accepted Pond & Co.’s proposal to design bridges to span creeks, tunnels under roadways, and elevated structures over wetlands. The consultant will identify opportunities along the trail for creek and wetland overlooks, seating areas, passive parks and other enhancements, according to a staff report to the council.
Pond also will be responsible for updating survey information, preparing construction documents, hydrological and flood studies for creek crossings, geotechnical services for bridge foundations, walls, tunnels and elevated trails, and limited construction administration, staff said.
The trail design is expected to be completed 9 to 12 months after the notice to proceed.