Padma Multipurpose Bridge Project

Landuse Type Mawa (ha) Janjira (ha)Fallow 4.41 21.69Total 30.81 145.297.2.2.4 Bridge end facilities72. Bridge-end-facilities include two service area and toll plazas in both side of the river. Toll Plazawill have ancillary facilities and weighbridge. The Spare Toll Plaza land on the Janjira side has beenplanned out as a location for mobilization offices and accommodation for the preliminary ProjectSupervision team whilst the full accommodation and offices are constructed on the Janjira ServiceArea. The Mawa side service area will include Temporary Offices for the Preliminary Supervisionteam, which includes accommodation, office and operative environments for onsite consultants andengineers. Janjira Side Service Area will accommodate medical center, mosque, gas station, resort,car parking, botanical garden, visitor center, and bridge experience exhibit.73. Construction of bridge end facilities at both end of the bridge has the following major activitiesthat will result in potential significant positive and negative impacts: Mobilization of equipments, construction materials/ vehicles Clearing of sites Development of infrastructureMajor Negative Impacts74. The major negative impacts are on: Noise quality Vegetation Fisheries Agriculture75. Deterioration in noise quality: The noise impact due to the mobilization of constructionequipments, materials and construction works at the sites will be of typical nature. However, the noiseimpact herein is expected high because the construction work over 27.03 ha in Mawa (SA1), 63.7 hain Janjira (SA2), and 28.88ha toll plazas of lands and several associated works that will require use oflarge number of construction equipments/machineries, construction vehicles, generators etc. Table7-15 lists the typical construction equipment and average noise level and noise level range. Thedeterioration in noise quality at a particular time depends on a number and type ofequipments/machineries, vehicles in operation and the location of receptors. Therefore, the noiselevel during construction will vary throughout the day and night. The best and easy approach is toreduce the effect of noise at recipients’ level. Hence persons working in the construction places will berequired to use ear-plugs. The noise impact on the surroundings from construction works for bridgeend facilities is expected to be within the acceptable level because of natural noise barriers (trees andplantations) in rural settings of the project area.Table 7-15: Noise generated from various construction equipmentEquipmentSound Level at Operator (dBA)AverageRangeBackground* 86Earth Moving:Front End Loader 88 85 – 91Back Hoe 86.5 79 – 89Bull Dozer 96 89 – 103Roller 90 79 – 93Scraper 96 84 – 102Grader