Specifications include, but are not limited to: 1 Contractor mobilization, traffic control, insurance, porta-potty, postings, layout staking 1 LS. 2 Temporary access road and staging area, miscellaneous trash & debris removals 1 LS. 3 Materials testing: soil density and concrete strength, by a licensed testing laboratory 1 LS. 4 Minor excavation & fill, grading and subgrade prep for concrete inlet apron and channel 110 SY. 5 Construct concrete lined channel and inlet apron, 3000 PSI concrete w/AEA 70 SY. 6 Construct small abutments for maintenance bridge, 3000 PSI concrete w/rebar & AEA 2 CY. 7 Fabricate and install steel maintenance bridge with wood decking 1 LS. 8 Subgrade prep for channel to pipe transition structure, and for energy dissipation structure 110 SY. 9 Construct pipe transition structure and energy dissipator, including formwork, 3000 PSI 10 CY. 10 Trench for 12" pipe running down the slope, compact subgrade 60 LF.
