Padma Multipurpose Bridge Project

Daily AnnualPM 5 1,923NO x 83 30,310SO 2 4 1,572CO 2 7,932 2,895,180CO 3,204 1,169,460TOC 108 39,245Note: Based on US EPA AP42, Table 3.3-1, 199792. Water Quality: There is a potential for hydrocarbon leakage and spills from storages andequipments; discharge of untreated sewerage from work camps to the water resources; or percolationthrough seepage and contamination of the local water table. Other potential sources of watercontamination are washing bays for equipment and trucks, construction water, spills of petrochemicalsfrom barges, floating cranes, vessel, personnel launches and generators. The high contents ofarsenic, manganese, and iron in both shallow and deep groundwater table in Bangladesh arecommon. There is a potential for polluted water supply system. There is a potential for clogging ofstorm water drains and surrounding lowlands due to dumping of solid waste and leaf into drains.7.2.2.6 Public Utility Crossings93. The provision of the following public utility crossings will be available on the lower deck of thebridge. High pressure gas transmission pipeline; High voltage power transmission line (an alternative option is being considered to install thepower line parallel and away from the bridge); and Optical fiber telecommunication cable.94. Installation of these utilities will not be done on the bridge during construction stage and hencewill not trigger out any potential impacts/risks. Provision for these utilities is kept in the bridge forfuture installation and connection.7.2.3 Operation and Maintenance Stage7.2.3.1 Main BridgeMajor Negative Impact95. Although the provision of railway is considered in the main bridge including the railway viaduct inthe detailed design, railway connection will be established at a later stage. However, we haveassessed the impacts of the railway during operation stage. The major negative impacts due to theoperation of the bridge are on; Deterioration in noise quality Scour at pier location96. Noise Quality: The significant negative impact identified for the main bridge is the deterioration innoise quality on the bridge, which is mainly due to movement of future rail on lower deck. Due to steeltruss structure at the lower deck, movement of railway is expected to generate noise similar toHardinge Bridge at Paksey in Bangladesh. Table 7-20 provides the predicted noise level. Thegenerated noise in bridge will be far away from the human settlements close to the bank and impactwill be minimal. Only the rail passengers over a limited time are expected to expose to the increasednoise from railway movement on the bridge. However, noise impact on the migratory birds will be aconcern.Table 7-20: Predicted noise level due to the railway operation7-27