Gwinnett School of Math, Science & Technology

Gwinnett County, GA

This project consisted of the hydrology study and detention design for a new High School in Gwinnett County, GA.  Working with HGBD, Inc., we were challenged with the infill development of an existing 25 acre site with a 1,200 student High School.  Existing development and the size of the site limited our options on types of detention facilities that would satisfy the strict requirments of Gwinnett County storm water regulations.

The design included a system of nine (9) 330 linear foot 12 foot diameter corrugated metal pipes connected by a common header.  This system is directly preceded by a stormwater quality device for oil and grit separation to help protect the facility.  The facility can handle, the water quality storm event, channel protection and detention volumes.


J M Smith Engineering LLC

155 Clarkesville Street

Cornelia, GA  30531

Phone: 706.894.2331

Fax: 678.267.3731



Quick Glance


 Underground detention pond maximizing use of site

 Development consisted of in-fill of existing structures.

 Detention facility brought entire site to within pre-developed flow rates for a site in its natural condition

 System consisted of nine 330 lf 12 foot diameter interconnected  corrugated metal pipes with water quality devices







Project Profile

Hydrology Studies