Drainage In Field Corridors, Tournament Sportsplex

Locate existing flat 12-inch drainage that is on 15-foot centers. Layout trenches parallel to existing drainage on 20-foot centers. Sod cut at a depth of 1 ¾ in. removed to the side of the trench to be reinstalled at the end of construction. Trench shall be a minimum of 9 inches wide and 15 inches deep. Rock bed shall be washed 89 granite stone of a minimum depth of 9 inches the bottom of which shall produce a constant grade of not less than 0.5 % slope. Trench shall be filled with ¾ inch layer of gravel on the bottom, then install 4 inches N12 ADS pipe in the center of the trench. Then, backfill with a minimum of 9 inches of gravel. Install 90/10 root zone mix on top of the gravel, maximum depth of 6 inches, then compact with plate compactor, level, and reinstall sod. The outfall of the 4-inch N12 pipe will be connected to the existing 6-inch N12 pipe running along the sideline of the field.

Division 31 -	Earthwork, Erosion and Sedimentation Controls.
Division 33 -	Utilities, Storm Drainage Utilities, Ponds and Reservoirs.