Riding Mountain National Park Environmental Impact Analysis
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September 2015 Manitoba Hydro V38R/Line 81 Riding Mountain National Park Environmental Impact Analysis Submitted to: Manitoba Hydro Licensing & Environmental Assessment Department 820 Taylor Ave (3) Winnipeg, Manitoba R3M 3T1 Prepared by: M. Forster Enterprises PO Box 931 Teulon, Manitoba R0C 3B0 Joro Consultants Inc. PO Box 23 Clandeboye, Manitoba AAE Tech Services Inc. PO Box 1064 LaSalle, Manitoba R0G 1B0 Dillon Consulting Ltd. 1558 Wilson Place Winnipeg, Manitoba R3T 0Y4 Manitoba Hydro V38R/Line 81 Riding Mountain National Park Environmental Impact Analysis September 2015 EXECUTIVE SUMMARY This report documents an Environmental Impact Analysis for activities associated with two existing Manitoba Hydro transmission lines that cross through a section of Riding Mountain National Park. It is submitted in response to Section 67 of the Canadian Environmental Assessment Act 2012 (CEAA 2012) as it is being carried out on federal lands. As Parks Canada is the authority administering these lands, it is submitted to Parks Canada following the Guide to Parks Canada Environmental Impact Analysis under CEAA 2012. The 230 kV V38R and the 115 kV Line 81 transmission lines were constructed in 1964 in a common 34 kilometre long Right-of-Way that enters the park at its northern boundary and continues south through the park to its southern boundary. For almost 50 years the transmission lines and Right-of-Way have been operated and maintained by Manitoba Hydro to provide service to customers outside of the park area, through collaboration with Parks Canada and the Province of Manitoba. The process of collaboration has been undertaken to facilitate mutually agreeable approaches and practices that allow Manitoba Hydro to operate and maintain the transmission lines and Right-of-Way in a manner that protects the environment and the ecological integrity of the park while maintaining a safe and reliable electrical system. A Class Screening Report and Environmental Protection Plan for Operations and Maintenance activities was developed by Manitoba Hydro and Parks Canada in 2008, which included a strategy for the development of a long-term Integrated Vegetation Management Plan that would include vegetation management techniques intended to protect, maintain and enhance ecological integrity. Due to changes in international and national design and operational standards, the transmission lines do not currently meet compliance requirements. The Right-of-Way is too narrow and the presence of tall “danger” trees adjacent to its edges are now assessed as creating conditions that jeopardize public safety and create environmental risks in terms of potential wildfires, in addition to the reliability and integrity of the transmission system. In order to comply with these requirements, Manitoba Hydro has proposed to widen the Right-of-Way by removing 7.8 metres of vegetation on the east side and allowing partial regeneration of 5.2 metres of vegetation on the west side, which will result in a net gain of 2.6 metres of Right-of-Way width. In addition to the widening of the existing Right-of-Way, improved access is required to allow Manitoba Hydro year-round access to the Right-of-Way for Operations and Maintenance activities. The existing Moon Lake access trail includes wet and boggy areas where machinery can get stuck and cause damage to the ground cover and underlying soils. Through research, consultations and field investigations, Manitoba Hydro assessed several alternatives for improved Right-of-Way access, including construction of new trails, or improvement of the existing trail. Based on this process, the preferred alternative selected was the redevelopment of portions of the existing trail route, using innovative methods designed specifically for use in forest and wetland areas. This approach eliminated the need for additional trail development in the Park, and greatly reduced the potential for adverse effects on fish, wildlife and their habitat, as well as reducing potential adverse effects on cultural resources, visitor experiences and First Nation historical and present-day Traditional activities and uses. i Manitoba Hydro V38R/Line 81 Riding Mountain National Park Environmental Impact Analysis September 2015 Based on the above, the Project is defined as the works associated with the widening of the Right-of-Way, redevelopment of the Moon Lake access trail, Manitoba Hydro’s ongoing Operation and Maintenance activities and further development of long-term Integrated Vegetation Management Plan. Particular care was taken in undertaking the Environmental Impact Analysis, in recognition of the important ecological resources, cultural resources and visitor experiences offered by Riding Mountain National Park, and the need to protect and preserve these resources. In addition to field studies and consultation with Parks Canada staff, Manitoba Hydro engaged in communications with the Coalition of First Nations with Interest in Riding Mountain National Park so that First Nations interests, values, knowledge and cultural practices in the park are recognized, maintained and included as part of the Environmental Impact Analysis. Manitoba Hydro developed a number of innovative planning, mitigation and long-term vegetation management approaches to be applied to the Project activities to prevent or minimize potential environmental effects, while addressing the overall goal of reducing risk to the environment and public safety. With incorporation of the planning, mitigation and management approaches, the Environmental Impact Analysis completed for the Project clearing, construction and Operation and Maintenance activities found that the environmental effects of the Project were not significant. The residual effects of the Project activities are not expected to result in cumulative effects that would increase the overall significance of the residual effects, or result in a significant change now or in the future in the characteristics of the ecological resources, cultural resources or visitor experiences in Riding Mountain National Park. Manitoba Hydro is committed to continuing to collaborate with Parks Canada and the Coalition of First Nations with Interest in Riding Mountain National Park to share information and ideas, identify and work to resolve all issues and concerns related to the Project, and conduct the required Project activities in a manner that respects, protects and preserves the ecological resources, cultural resources and visitor experiences offered by Riding Mountain National Park. ii Manitoba Hydro V38R/Line 81 Riding Mountain National Park Environmental Impact Analysis September 2015 TABLE OF CONTENTS 1. INTRODUCTION ..................................................................................................................1 1.1. Project Need and Purpose ..........................................................................................4 1.2. Project Objectives .......................................................................................................4 1.3. Manitoba Hydro and Parks Canada Mandates ............................................................ 5 1.4. Scope of the Assessment ............................................................................................ 7 1.4.1. Scope of the Project ............................................................................................ 7 1.4.2. Factors and Scope of the Factors ...................................................................... 10 1.4.2.1 Factors to be Considered .............................................................................. 10 1.4.2.2 Scope of the Factors ..................................................................................... 11 1.4.2.3 Spatial Scope ................................................................................................ 12 1.4.2.4 Temporal Scope ............................................................................................ 12 1.5. Regulatory Framework .............................................................................................. 12 2. PROJECT AREA AND LOCATION ................................................................................... 13 2.1. Project Study Area .................................................................................................... 13 2.2. Local Study Area ....................................................................................................... 14 2.3. Regional Study Area ................................................................................................. 14 2.4. Management Zones within RMNP ............................................................................. 14 3. PREVIOUS STUDIES ........................................................................................................ 15 4. PROJECT DESCRIPTION ................................................................................................. 16 4.1. Overview ................................................................................................................... 16 4.2. Analysis of Alternatives ............................................................................................. 17 4.3. Project Components and Activities ............................................................................ 19 4.3.1. Ongoing Routine Operations ............................................................................. 19 4.3.2. Widening of the RoW Along the East Side ........................................................