Padma Multipurpose Bridge Project

Annex 8-1ECP 9: Borrow Areas Development & OperationProject Activity/Impact SourceDevelopment andoperation of borrowareasEnvironmental ImpactsGenerally dredge materials will beused as borrow material for fillingof construction sites to the 100year flood level. In case, theborrow pits developed by theContractor, there will be impactson local topography, landscapingand natural drainage.Mitigation Measures/ Management GuidelinesThe Contractor shall Use dredge materials from the Padma river as borrow materials to the maximum extentpossible Identify borrow pits in consultation with the local governments and BBA. Obtain the borrow material from: barren land or land without tree cover outside the road reserve; excavating land and creating new water tanks/ponds; land acquired temporarily outside the road reserve; excavation of proposed culverts; Do not dug the borrow pits within 5m of the toe of the final section of the roadembankment. Dig the borrow pits continuously. Ridges of not less than 8 m widths shall be left atintervals not exceeding 300 m and small drains should be cut through the ridges tofacilitate drainage Slope the bed level of the borrow pits, as far as possible, down progressively towards thenearest cross drain, if any, and do not lower it than the bed of the cross-drain, to ensureefficient drainage. . Do not dig the depth of borrow pits exceeding 45 cm when it becomes necessary toborrow earth from temporarily acquired cultivable lands. Strip the topsoil to a depth of 15cm and stockpile for later rehabilitation of the pit. Thereafter, dug out soil to a further depthnot exceeding 30 cm and use in forming the embankment. Spread the stockpiled top soilback on the land once the borrow pit is no longer required. Do not locate the borrow pits within 500 m of any identified archaeological, religious orcultural sites if any. Haul the borrow materials to embankments, or other areas of fill, only after sufficientspreading and compaction plant is operating at the place of deposition. Follow the below for restoration of borrow areas are: Return stockpiled topsoil to the borrow pit if is used for agriculture; Stabilize the banks of the borrow pit with the top soil if it is used for fish pondsPadma Multipurpose Bridge Design ProjectFinal Report (Environmental Action Plan)Environmental Impact Assessment Report A8-11June 7, 2010