NOVA Gas Transmission Ltd. Environmental and Socio-Economic Assessment 2017 NGTL System Expansion March 2015/ 497874/650026/650027/650028/650029/652265/652345 2.0 PROJECT DESCRIPTION This section describes and identifies the Project purpose, location, components and summarizes activities associated with the construction, operations and maintenance, as well as decommissioning and abandonment phases of the pipelines and compressor stations. Figure 1.1-1 (Section 1.0) provides the regional location of the Project. Additional Project description details are provided in Section 1.0 of the Application. 2.1 Project Purpose The Project is required to meet aggregate firm service contracts for the receipt and delivery of sweet natural gas, and all components of the Project are required to meet the firm service requests. Although the Project components are located in various areas on the NGTL System, they form the necessary components of a single system expansion. See Section 2.0 of the Application for a more thorough description of the Project purpose. The Project will entail the construction and operations of five buried natural gas pipelines and two compressor stations. The Project will be part of the NGTL System, a network of 24,500 km of pipeline that transports natural gas for use within Alberta and BC and for delivery to other markets across North America. 2.2 Alternative Means Alternative means are the various ways that are technically and economically feasible to implement and carry out the Project and are discussed briefly in Section 4.0 in compliance with Section 19(1)(g) of the CEA Act, 2012. 2.3 Components and Locations of the Project This subsection describes and identifies the technical details and proposed location of the Project components, including the pipelines and associated permanent pipeline facilities, compressor stations, construction camps, and other temporary infrastructure and workspace and access. These various components are described separately below. 2.3.1 Pipelines This ESA assumes minimum construction right-of-way widths of 32 m plus temporary workspace for the Boundary Lake, Bear Canyon, McLeod River and Pelican Lake sections. A minimum construction right-of-way width of 27 m plus temporary workspace was assumed for the Christina River Section. Additional temporary workspace will be necessary at log decks, soil and material storage sites, road and third-party utility crossings, locations where grading on slopes is required, sidebends and watercourse crossings (e.g., HDD staging areas), equipment and fuel storage sites, stockpile sites, contractor offices and yards, and borrow pits (see Section 2.3.4). The temporary workspace widths will vary for each proposed pipeline route and site-specific conditions. Where the pipeline is contiguous with existing linear facilities, and where disposition holder consent has been obtained, NGTL intends to make use of existing land disturbance to reduce overall linear disturbance. Table 2.3-1 summarizes the location and technical details of the proposed pipeline routes. TABLE 2.3-1 TECHNICAL DETAILS OF THE PROPOSED PIPELINE ROUTES Pipeline Route Technical Component Project Details Boundary Lake Total length: 91.4 km Section Length parallel to existing 85.7 km (93.7%) linear disturbances: Non-contiguous length: 5.8 km (6.3%) Product: Natural gas Maximum operating pressure: 8,450 kPa Page 2-1 NOVA Gas Transmission Ltd. Environmental and Socio-Economic Assessment 2017 NGTL System Expansion March 2015/ 497874/650026/650027/650028/650029/652265/652345 TABLE 2.3-1 Cont'd Pipeline Route Technical Component Project Details Boundary Lake Source point: Alces River Compressor Station: NW 13-85-13 W6M Section (cont’d) Delivery point: Owl Lake South Meter Station: NE 20-94-12 W6M Pipe size: 914 mm O.D. (NPS 36) Minimum depth of cover: 0.9 m (1.5 m at watercourse and road crossings) Typical trench width: 1.5 m in earth and rock soil and 1.8 m in muskeg Test medium: Water/methanol mix Bear Canyon Total length: 26.7 km Section Length parallel to existing 19.8 km (74.2%) linear disturbances: Non-contiguous length: 6.9 km (25.8%) Product: Natural gas Maximum operating pressure: 8,450 kPa Source point: Saddle Hills Compressor Station: SE 5-79-9 W6M Delivery point: Valve site NW20: SW 35-80-11 W6M Pipe size: 914 mm O.D. (NPS 36) Minimum depth of cover: 0.9 m Typical trench width: 1.2 m Test medium: Water/methanol mix McLeod River Total length: 36.3 km Section Length parallel to existing 33.5 km (92.3%) linear disturbances: Non-contiguous length: 2.8 km (7.7%) Product: Natural gas Maximum operating pressure: 8,275 kPa Source point: New valve site: NW 21-55-20 W5M Delivery point: Existing valve site: SE 11-53-18 W5M Pipe size: 1,219 mm O.D. (NPS 48) Minimum depth of cover: 0.9 m Typical Trench width: 1.2 m Test medium: Water/methanol mix Pelican Lake Total length: 56.1 km Section Length parallel to existing 53.5 km (95.4%) linear disturbances: Non-contiguous length: 2.6 km (4.6%) Product: Natural gas Maximum operating pressure: 9,930 kPa Source point: Buffalo Creek Compressor Station: SW 19-86-18 W4M Delivery point: Pelican Lake Compressor Station: NE 30-81-16 W4M Pipe size: 762 mm O.D. (NPS 30) Minimum depth of cover: 0.9 m Typical trench width: 1.2 m Test medium: Water/methanol mix Christina River Total length: 19.6 km Section Length parallel to existing 17.1 km (87.5%) linear disturbances: Non-contiguous length: 2.5 km (12.5%) Product: Natural gas Maximum operating pressure: 9,930 kPa Source point: Leismer-Kettle Crossover: NW 26-80-6 W4M Delivery point: Graham Lateral Loop 2 Junction: NW 14-79-5 W4M Page 2-2 NOVA Gas Transmission Ltd. Environmental and Socio-Economic Assessment 2017 NGTL System Expansion March 2015/ 497874/650026/650027/650028/650029/652265/652345 TABLE 2.3-1 Cont'd Pipeline Route Technical Component Project Details Christina River Pipe size: 610 mm O.D. (NPS 24) Section (cont’d) Minimum depth of cover: 0.9 m Typical trench width: 1.2 m Test medium: Water/methanol mix Note: Presented values for total length, length parallel to existing linear disturbances and non-contiguous length are rounded. Length parallel to existing linear disturbances and non-contiguous length were calculated using the full (i.e., not rounded) values. 2.3.1.1 Permanent Pipeline Facilities In addition to the proposed pipeline routes, the following permanent facilities will also be constructed within the construction rights-of-way: • tie-ins; • valve sites; • cathodic protection; • launcher and receiver facilities to accommodate cleaning and in-line inspection; and • miscellaneous works such as pipeline warning signs and aerial markers. See Sections 7.0 and 8.0 of the Application for additional detail on the associated permanent pipeline facilities. 2.3.2 Compressor Stations The location and technical details of the components of each of the proposed compressor stations are summarized in Table 2.3-2. TABLE 2.3-2 TECHNICAL DETAILS OF THE PROPOSED COMPRESSOR STATION UNIT ADDITIONS Technical Component Project Details Alces River Unit Addition Compressor Station Location: NW 13-85-13 W6M Compressor Station Components General Electric NovaL T16 gas turbine compressor (new unit) (Make/Model): Mars 100-1500S gas turbine with C601 compressor (existing unit) Fuel Type: Natural gas Construction Schedule: Q4 2016 to Q2 2017 Existing Alces River Compressor 160 m x 150 m Station Footprint: Proposed Alces River Unit Approximately 160 m x 100 m (partially within existing station boundaries) Addition Footprint: Total Compressor Station 160 m x 190 m Footprint: Structures on Site: Anticipated new structures: one compressor station building; one auxiliary power unit (APU) generator skid; two mechanical buildings; one utility gas enclosure; and one drum rack. Existing structures: two compressor station buildings (one used as heated storage); one control building; one utility gas enclosure; two local control module buildings; one heated storage building; and one drum rack. Page 2-3 NOVA Gas Transmission Ltd. Environmental and Socio-Economic Assessment 2017 NGTL System Expansion March 2015/ 497874/650026/650027/650028/650029/652265/652345 TABLE 2.3-2 Cont'd Technical Component Project Details In-Service Date: Beginning on April 1, 2017 Expected Useful Life of 25 years Compressor Station: Power Rating: 16.5 MW Otter Lake Unit Addition Compressor Station Location: SW 8-91-16 W5M Compressor Station Components General Electric LM2500 gas turbine compressor (new unit) (Make/Model): Siemens/Rolls-Royce RB211 gas turbine compressor (existing unit) Fuel Type: Natural gas Construction Schedule: Q4 2016 to Q2 2017 Existing Otter Lake Compressor 300 m x 300 m Station Footprint: Otter Lake Unit Addition Approximately 140 m x 300 m (within existing station boundaries) Footprint: Total Compressor Station 300 m x 300 m Footprint: Structures on Site: Anticipated new structures: one (Unit B2) compressor building; one APU generator skid; two mechanical buildings; one electrical building; one utility gas enclosure; and one compressor control/cooler Motor Control Centre building. Existing structures: one (Unit A1) compressor station building; one APU generator building; two mechanical buildings; one electrical building; one personnel building; one compressor control/cooler Motor Control Centre building; one utility gas enclosure; one living quarters building; one heated storage building; and one drum rack building. In-Service Date: Beginning on April 1, 2017 Expected Useful Life of 25 years Compressor Station: Power Rating: 30 MW 2.3.3 Construction Camps The temporary construction camp associated with the Otter Lake Unit Addition is considered quantitatively in this ESA. The construction camp is located at SW 10-91-16 W5M and SE 11-91-16 W5M approximately 5 km east of the compressor station site and will use existing access (Figure 1.1-1[h]).