Environmental Impact Assessment(EIA) Registration for the ...

More documents

Recommendations

Info

REVISED PROJECT DESCRIPTION AND ENVIRONMENTAL IMPACT ASSESSMENT (EIA) REGISTRATION FOR THE NEPISIGUIT FALLS GENERATING STATION MODIFICATION AND REHABILITATION PROJECT resulting environmental effects could be significant in relation to the identified thresholds of significance for each VEC (previously identified, as applicable). It is noted that Accidents, Malfunctions and Unplanned Events are evaluated individually, in isolation of each other, as the probability of a series of accidental events occurring in combination with each other is not likely to occur. It is not credible to assess the occurrence of a series of accidental events occurring in parallel or as a result of each other, nor would it be possible to predict or prevent such occurrences, even with the best of planning. These possible events, on their own, generally have a very low probability of occurrence and thus their environmental effects are of low likelihood. They have an even lower probability or likelihood of occurring together—thus their combination is not considered credible, nor of any measurable likelihood of occurrence. Various credible accidents, malfunctions, and unplanned events have been selected to complete the assessment. Since it is impossible to review and assess all possible accidents, malfunctions and upset conditions, scenarios which represent higher consequence events that would more than adequately address the consequences of less likely or lower consequence scenarios have been chosen for assessment. 4.4.2 Identification of Accidents, Malfunctions, and Unplanned Events The credible Accidents, Malfunctions and Unplanned events that have been selected, based on experience and professional judgement, are described below. Loss of Containment: Loss of Containment includes a partial or total failure of the NFGS or any of its components, resulting in temporary or permanent damage to structures and equipment as well as the unplanned release of water downstream. Failure of the Coffer Dam: Failure of the Coffer Dam during Construction includes a partial or total failure of the Coffer Dam resulting in a significant delay in the Project schedule, loss or damage to equipment, temporary or permanent damage to structures, and/or the release of sediment and/or debris downstream. In the case where a large sudden breach occurred, failure of the Coffer Dam could result in significant damage to equipment, serious injury, or even loss of life. As the Coffer Dam will be removed following Construction, this unplanned event is not relevant to the subsequent Operation or Decommissioning and Abandonment phases of the Project. Hazardous Materials Spill: A spill of petroleum, oil and lubricants (POLs) or other liquid hazardous materials may occur during refueling of machinery or through breaks or leaks in hydraulic lines of equipment. Erosion and Sediment Control Failure: Erosion and sediment control structures (e.g., check dams, sediment fencing) may fail as a result of improper installation, lack of maintenance, or an unplanned event Page 64 June 15, 2011
REVISED PROJECT DESCRIPTION AND ENVIRONMENTAL IMPACT ASSESSMENT (EIA) REGISTRATION FOR THE NEPISIGUIT FALLS GENERATING STATION MODIFICATION AND REHABILITATION PROJECT Fire: A Fire could occur during any phase of the Project due to an equipment accident, human carelessness, or natural causes such as a forest fire under dry conditions. Discovery of a Heritage Resource: Heritage Resources (including artifacts) may be uncovered during ground disturbing activities, through erosion, or by exposing new soil (e.g., through dewatering). Vehicle Accident: Project-related vehicle accidents that could occur on road transportation network, including vehicle accidents involving wildlife. Wildlife Encounter: There is the potential for encounters by Project-related workers with wildlife during Construction or Operation and Maintenance, including wildlife strikes. It is difficult to predict the precise nature and severity of these events. However, the probability of serious accidental events or those causing significant adverse environmental effects is low, particularly when construction and operation procedures incorporate contingency and emergency response planning. 4.4.3 Environmental Effects Assessment The potential interactions between the selected Accidents, Malfunctions, and Unplanned Events that could occur during the Construction or Operation and Maintenance of the Project and each relevant VEC are identified in Table 4.6 below. Table 4.6 Potential Interactions of Project-Related Accidents, Malfunctions, and Unplanned Events with the Environment Accident, Malfunction, or Unplanned Event Atmospheric Environment Water Resources Aquatic Environment Terrestrial Environment Wetland Environment Land Use and Economy Heritage Resources Current Use of Land and Resources for Traditional Purposes by Aboriginal Persons Loss of Containment 0 1 1 1 0 1 1 1 0 Failure of the Coffer Dam 0 1 1 0 0 0 0 0 0 Hazardous Materials Spill 0 1 1 1 0 1 1 1 0 Erosion and Sediment Control Failure 0 1 1 0 0 1 1 1 0 Fire 1 0 0 1 0 1 0 1 1 Discovery of a Heritage Resource 0 0 0 0 0 0 1 0 0 Vehicle Accident 0 0 0 1 0 0 0 0 1 Wildlife Encounter 0 0 0 1 0 0 0 0 0 Road Transportation June 15, 2011 Page 65
Page 1:
Revised Project Description and Env
Page 4 and 5:
REVISED PROJECT DESCRIPTION AND ENV
Page 6 and 7:
Page 8 and 9:
Page 10 and 11:
Page 12 and 13:
Page 14 and 15:
Page 16 and 17:
Boom Headpond Main Dam and Sluicewa
Page 18 and 19: REVISED PROJECT DESCRIPTION AND ENV
Page 93 and 94: View of the Spillway Dam Showing Wo
Page 95 and 96: Client: New Brunswick Power Corpora
Page 97: Client: New Brunswick Power Corpora
Page 102 and 103: Scale: Job No.: Figure No.: Cross S
Page 104 and 105: Spillway Concrete Repair Works Plan
Page 106 and 107: Scale: Job No.: Drawing No.: Plan V
Page 108 and 109: Cross Section of the Rubber Dam Dra
Page 110 and 111: Scale: Job No.: Drawing No.: Plan V
Page 114 and 115: Brunswick PERMIT FOR WATERCOURSE AN
Page 116: DOCUMENT "A" Attached to ALT 31667'
show all

Environmental Impact Assessment(EIA) Registration for the ...

Create successful ePaper yourself

Delete template?

Save as template?