Peachtree Corners City Council will consider a zoning change Tuesday evening to approve a stream buffer variance for a portion of a 19.6 acre tract planned as part of the city’s future Town Center at Peachtree Parkway near Forum Drive.

The variance will allow encroachment into the 50-foot undisturbed buffer and 75-foot impervious stream setback line to construct a Gabion stacked-stone and wire retaining wall and accommodate parking, a walkway and a small portion of one building. The steep topography adjacent to the existing stream necessitates the use of retaining walls.

A similar variance was approved in April for the other side of the stream. In that situation, the encroachment was also the result of a retaining wall adjacent to required parking. To compensate for the buffer loss, the applicant in that case set aside land to be used for green space. In this case, the Downtown Development Authority is developing a two-acre town green that will be used as both passive and active open space.