“Gravel wetland” means a horizontal-flow filtration system that relies on a dense root mat, crushed stone, and a microbe rich environment to treat stormwater.

Source. #9343, eff 1-1-09; ss by #12342, eff 8-15-17 (formerly Env-Wq 1502.23); ss by #14472, eff 1-19-26, EXPIRES: 1-19-36 (formerly Env-Wq 1502.27)