Page 61 - Bridge and Highway Structure Rehabilitation and Repair

36 SECTION 1 ADMINISTRATIVE ISSUES

• Improving drainage
• Construction impact on fl oodplain
• Soil erosion and sediment transport: Minimizing the erosion of native substrate due to
sediment transport after the installation.
2. Issues related to ecology:
• Preservation of vegetative species: Ecology (flora and fauna), minimizing impacts to

natural vegetation by controlling construction access points
• Re-vegetation of disturbed areas with species may be required
• Landscape preservation
• Preservation of endangered species.
3. Maintaining air and water quality:
• Maintaining air quality and avoiding air contamination, pollution
• Noise mitigation from construction vehicles, pile driving, concreting, excavation, welding,
etc.
• Relocation hazards of underground and bridge supported utilities
• Reactions with acid producing soils.
4. Related Issues:
• Historical and cultural aspects, aesthetics, “landmark”
• Temporary works and scaffolding
• Traffi c disruption
• Socio-economic aspects, relocation
• Right-of-way issues
• Permitting considerations and implementing EPA/DEP procedures.

1.13.2 Action Required by Environmental Engineer

1. To minimize adverse environmental impacts, address these environmental concerns:
• Develop a baseline survey to define current environmental issues

• Develop an assessment of the impact of proposed repairs on air pollution or on the water
environment
• Develop considerations or measures to avoid or mitigate adverse impacts
• Eliminate impacts on wetlands by using top to bottom construction and temporary
bridge
• Develop alternatives to minimize impacts.
2. Environmental related items:
• Requirements for paint removal and containment and disposal of contaminants shall be
incorporated as per the current State Department’s policy.
• The need for bridge mounted sound walls shall be determined in conjunction with the
need for sound walls on the adjoining roadway.

1.13.3 Permit Requirements
1. The proposed construction should neither damage an existing wetland nor adversely affect

the historical significance of the bridge itself or its surroundings, except as permitted through

the environmental evaluation process. For bridges located on streams, a flood hazard area
general permit is required.
2. Engineering data and documentation are required for permit approval. As per regulations,
the following reports/proforma need to be submitted: