CONSTRUCTION of GREEN STORMWATER INFRASTRUCTURE in S . 59TH ST

2026-11-03

A . The work of this Contract includes all work necessary to produce complete and fully usable water , sewer , and green stormwater infrastructure facilities ( surface and subsurface ) as shown and described in the Contract Documents . B . Construction shall not begin until all erosion and sedimentation control facilities have been installed and approved by the PWD Project Manager . The Contractor shall minimize disturbance within the working area wherever possible and restrict the limit of disturbance to the extent feasible . C . The paving work of this Contract has a designed service life of 40 years . All such work shall conform strictly to the requirements of the Philadelphia Streets Department and of the Pennsylvania Department of Transportation . D . Experience indicates that inadequate compacting of backfill in water , sewer , and above stormwater trenches frequently results in premature failure . The Contractor will be required to employ the best practices for placing and compacting backfill as directed in these specifications in order to prevent such failure . E . The Contractor shall be required to maintain a clean , functional , and safe worksite at all times . Measures indicated herein are considered the minimum acceptable requirements to maintain a responsible worksite . Site - specific conditions may mandate additional measures on any given project . In such cases , the Contractor is required to be amenable and responsive to requests from the PWD Project Manager to increase site management procedures in place . F . Green Stormwater Infrastructure 1 . In general , the work includes sawcutting and removal of existing sidewalk and paving ; excavation of trenches and disposal of material ; excavation and grading of rain gardens , stormwater bumpouts and swales ; installation of check dams and spillways ; installation of clean washed stone and geotextile ; installation of thermoplastic , ductile iron and RCP drainage pipe and fittings , cleanouts and riser structures ; installation of energy dissipaters ; installation of observation wells ; installation of trench drains and concrete aprons ; installation of new stormwater inlets , control structures and laterals ; installation and modification of existing inlets , restoration of sidewalks , curbs , streets and disturbed residential lawns ;, and placement and grading of specified stormwater and planting soils . 2 . Experience indicates that over compaction of subgrade in infiltration trenches results in failure of infiltration systems . The Contractor will be required to adhere to the specific excavation of the subgrade preparation and grading as directed elsewhere in these specifications .

Pennsylvania

2026-05-09