Specifications include, but are not limited to: CONCRETE STRUCTURES- POURED IN PLACE Work Included: The Contractor shall furnish and place all materials necessary to construct concrete drainage structures, reinforced and non-reinforced; as directed by the Engineer/Project Manager or the Plans. Such structures will ordinarily be used where the alternative precast concrete or brick structures are not feasible and/or economical; and junction boxes, catch basins and reinforced walls. Paved Ditches- 4" Reinforced: The Contractor shall construct the paved concrete ditch with a minimum of 4" thickness of 3000 psi concrete. Concrete ditch shall be reinforced with a minimum 6" x 6" wwf w/expansion joints spaced at 30' max and construction joints at 10' max. A drop end section shall be constructed on both ends of ditch to a depth of 2'. Ditch shall be constructed to a minimum 12" depth with 2:1 side slopes or as directed by Construction Plans or Engineer/Project Manager. . Minimum 3000 psi concrete to be used for tops with no additives. Minimum ten (10) day cure. 2. Contractor shall obtain field measurements for all tops. 3. Contractor shall retrieve and re-use 1033 rings and covers when possible. 4. Contractor shall remove old top completely and dispose of properly. 5. Contractor shall be responsible for all traffic control. 6. Contractor shall landscape and repair damaged grass, shrubs, etc. 7. Contractor shall be entirely responsible for integrity of catch basin top until County inspector’s approval (typically 48 hours after notification of completion). 8. Contractor shall be responsible to tie in the batch basin with the curb to produce a finished, professional look. 9. Catch basin tops shall be completed within 30 days of notification to begin. 10. Contractor shall spray paint the fronts of the catch basin steel with a light gray epoxy paint upon completion. 11. Vertical supports shall be field constructed or adjusted so that all will fit flush against supporting surface. 12. Georgia DOT standard, 1033 ring and cover shall be cast in place. Refer to GA DOT standards for further details. 13. Gwinnett County reserves the right to reject work based on poor quality or aesthetics. 14. Channel steel shall be mitered and welded with a continuous weld at all joints. 15. 1033 ring and cover shall be placed in slab so that it is positioned directly over manhole, minimum 12” from front of slab.