Chastain Meadows Regional Stormwater Management Facility
Cobb County, GA
Noonday Creek is located in a highly-urbanized portion of Cobb County with a drainage basin of 14+ square miles. To reduce downstream flooding during smaller storm events and alleviate ongoing channel degradation, Cobb County constructed a regional stormwater management facility across the creek in the Chastain Meadows area. The principal spillway of the dam consists of a quadruple barrel 10-foot by 11-foot concrete box culvert with a rectangular weir box sized to reduce the flows during the lower storm events. The embankment is designed to overtop during large storm events and has overtopping protection provided by tapered articulated concrete block mats.
• On-Call Services associated with the redesign of this unique structure due to our familiarity with the design and installation of articulated concrete block mats for use as overtopping protection.
• peer review of the previous RCC dam and spillway design
• DAMBRK modeling and inundation mapping
• Georgia Safe Dams Program coordination
• design and evaluation services of the new facility including soil borings materials testing spillway analysis embankment design seepage drain layout and configuration design and layout of the articulated concrete block mats realignment of the existing 36-inch sanitary sewer outfall preparation of construction documents bidding construction administration.