The study was conducted to assess the environmental impacts on proposed Golchattor Bridge is planned for construction over the River Dhaleshwari at Tangail district. Primary data were collected from field survey, focus group discussion (FGD), questionnaire survey (QS) and key informant interview (KII), whereas secondary data were collected from different books, journals, published documents of LGED and DoE. The result found that the air quality and noise level did not exceed the Bangladesh standard, and surface water quality was also within the permissible limit. During the construction and operation phase of the proposed bridges, the main environmental issues are air and dust pollution, noise and vibration, solid and hazardous waste, liquid waste discharge, etc. The study also depicted that risk of contamination in soils, groundwater and surface water from liquid waste and leaks of hazardous materials during handling, transportation and storage at the site. During the operation phase, the ambient air and noise quality may be affected and a risk of increase in road traffic and road accident. Magnitude of impact matrix in project activities at the pre-construction, construction and operation stage are as 1.19, 0.96 and 0.94 where pre-construction, construction and operation impact is low. The effective implementation of EMP and allegiance with the Local Government Engineering Department assists in minimizing the environmental impacts to acceptable levels.

Key words: EIA, Dhaleshwari River, mitigation, EMP, Bangladesh.