John Hart Generating Station Replacement Project. October 2017 Community Construction Update Report #52

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1 John Hart Generating Station Replacement Project October 2017 Community Construction Update Report #52 Prepared by: Stephen Watson, BC Hydro (O) or (C)

2 Project Status The blast to remove the rock plug for the water intake approach channel was successfully completed on October 3; Excavation of the approach channel rock has begun using an on-shore crane and a clam-shell bucket. The double-lined silt curtain remains in the reservoir for water quality protection; Work on the intake operating gate is almost complete final stages of concrete will be placed in November; Work to install the intake shaft lower elbow is ongoing. Welding of the upper bend elbow is complete and it has now been lowered into place; Formwork and concrete placements continue for the surge tank. Once complete the surge tank will be 20 metres tall from its base; however, the area around it will be filled so only 10 metres will be visible above the ground; Concrete paving of the 1.6 km power tunnel invert (floor) will continue throughout November; The power tunnel manifold concrete works is almost complete. Structural concrete work for the project is expected to be finished in November; Electrical and mechanical work on the three turbine/generator units is progressing well. Our first rotor was installed and a second stator was installed. Assembly of rotors for the remaining two units are underway on the project site; Installation of the suspended ceiling in the powerhouse and the office complex is underway; The office complex now has both the structural steel and a concrete floor in place. Finishing work including installation of drywall, lighting, plumbing, and equipment has begun and will continue through the fall; Installation of the water bypass system in the valve bay is underway; and The tailrace is being prepared for drilling and blasting of the rock plug removal in November. This month Georgean Price and family permanently shut down Generator #5 within the existing powerhouse.

3 Project Schedule November: Powerhouse office complex installation of drywall, lighting, plumbing; October-December: Turbine water inlet valves installed; November: All concrete works completed; November: Blast to remove tailrace rock plug beside the Campbell River; December: Powerhouse suspended ceiling installation complete; December: Installation of the valves and piping for the low level outlet/environmental flow release system begins; December: Dry testing of Turbine/Generator #3 underway; December-February: Water intake structure installation of electrical and mechanical works (cable trays, lighting, piping, valves, etc.); and December-February: Draft tubes and water bypass outlet gates testing. Jobs and Economics Total estimated number of workers, employees on the site (end of Sept): 296 On-site ASL-JV employees: % local (90 KM) residents; 100% BC residents; $56 million paid in wages since project start; and Workforce includes: admin/clerks, biologist/enviro techs, carpenters, cement masons, crane operators, drafters, electricians, engineers, first aid, ironworkers, labourers, operators, mechanics, and teamsters. Total ASL-JV subcontractor/supplier and vendor spend to date: ~$256 million: Includes: subcontractors, car dealerships and vehicle maintenance, equipment purchase/rentals, catering, printing, and so on. The first rotor was installed into Turbine/Generator #3 on October 5.

4 Construction Pictures John Hart Dam 4 Oct 22.

5 Spilling water down Elk Falls Canyon. The right photo shows the blast event beside the new water intake. 5

6 Construction Pictures John Hart Dam The clam bucket work has begun to remove the blasted rock from the reservoir bottom. Inset photo shows rock being trucked off the site. 6

7 Construction Pictures John Hart Dam 7 The low level outlet works downstream of the John Hart dam.

8 Construction Diagram Concrete Work Intake operating gate. Valve house building. Low level outlet pipe. Inlet valve foundations. Operating valve foundations. Environmental flow release system pipe. 8

9 Low Work on the Level surge tank. Outlet Formwork August

10 Low Level Outlet Formwork August 6-27 The upstream power tunnel manifold and construction of the rock trap (captures any loose rock pieces) in front of it. 10

11 Gate gallery. Formwork for water bypass outlets. 11 One of the water inlets to the water bypass facility viewed from the power tunnel manifold. This part of the facility is protect downstream fish habitat.

12 Work within the tailrace tunnel. Water inlet to Turbine/Generator #2. Water inlet to Turbine/Generator #3. Water inlet to Turbine/Generator #1. 12

13 View through the water inlet. View down the length of the 520 metre long tailrace tunnel. 13

14 14 The approach to the water inlet to Turbine/Generator #3. Adit B is in the background.

15 Formwork installed for half of the water inlet to Turbine/Generator #3 and to enclose the power tunnel manifold area. 15

16 View of the Construction Pictures Power Tunnel downstream side of the power tunnel manifold construction. 16 The main access tunnel and getting ready to place concrete inside the office complex.

17 Construction The powerhouse Pictures area looking back Powerhouse towards the service tunnel. View down Turbine/Generator #2. 17

18 The installation of the first rotor took place in early October. Powerhouse view. 18

19 It weighed 117 metric tones and was placed inside Turbine/Generator Office #3. complex. Main access tunnel. 19

20 Gate General gallery. Electric crews placed the rotor inside the stator. Discovery Channel s Daily Planet filmed the installation and it should air in November Outlet from one of the turbine/generators into the surge chamber. 20

21 The gate gallery gantry crane. 21

22 22 Below the gate gallery is the surge chamber.

23 Powerhouse Area The stator and work within Turbine/Generator #3. 23 Building the rotor (electromagnets) for Turbine/Generator #2. The spinning rotor and magnets, surrounded by the copper winding in the stationary stator, creates the magic of electricity production.

24 Tailrace Area The gate gallery area downstream of the powerhouse. Gantry crane shown near water bypass #1 gate slot. 24

25 Construction Diagram Concrete Work Gate gallery. Unit #1 draft tube gate slot. Water bypass #1 gate slot. Gantry crane rails. Surge chamber. Unit #1 draft tube outlet. Water bypass #1 outlet. 25

26 Tailrace Area Located below the gate gallery is the surge chamber, where water will enter the tailrace tunnel to the Campbell River. 26

27 Mrs. Price Shuts Down The First Unit

28 Mrs. Price Shuts Down The First Unit Members from the Price family, BC Hydro, and InPower BC.

29 Environment Drone flight down the canyon In early October, the project s environmental team worked with SuavAir to fly a drone down Elk Falls Canyon to collect imagery about the river s gravel substrate. The aim was to gather baseline data about the existing deposits of gravel that fish may use for spawning (drone picture shown below) prior to the new generating station being brought online in Using geographic information system (GIS) technology, the images can be combined into a gravel data map that can be compared with a future flight s data, if future gravel mapping is required. A new I Saved A Frog sticker is out! This popular program recognizes workers who go above and beyond to make a difference to our environment - whether saving a critter, protecting habitat or cleaning up a spill. Hard hat stickers are a highly prized item on our project site.

30 People Profile Crystal Uzzell-Modras About Crystal Background: Crystal has worked in finance/accounting in a variety of industries for most of her career. She studied accounting at North Island College (NIC) and Vancouver Island University, as well as having many years of hands on experience. Home: Born and raised on Vancouver Island, Crystal has spent most of her years in Campbell River. She and her husband Mike have two daughters. Kylie is studying Animal Health at NIC and Jana is studying business management at UBC-Okanagan. Hobbies: When not at work Crystal enjoys spending time with her family and friends enjoying good food and wine. She also likes spending time reading, gardening and shopping. Project Responsibility: Crystal works in the finance/accounts payable department for ASL-JV. She and her coworkers make sure that vendors get paid correctly, and in a timely manner. Sometimes this requires a bit of investigative work to verify that invoices are ok to pay. To this end, she regularly consults with field engineers to make sure that invoices are accurate and that the product or service is complete. Life is a journey to be experienced not a problem to be solved. (Winnie the Pooh). I have had many great experiences working with such a vast, diverse and wonderful group of people!

31 Construction Point Of Interest Each month, BC Hydro and InPower BC will provide a construction fact, occurrence, or situation. Point of Interest November blast to remove the rock plug between the tailrace tunnel and the Campbell River. The rock plug at the tailrace exit will be removed with a single blast. Then the rock will be removed to create an upward-sloped channel outlet that the tunnel water will pass through to enter the Campbell River. All the previous blasts in the tailrace area have been analysed and the data about the rock and vibrations is being used to develop the firing sequence for the blast; Based on that data, the blast overpressure shock wave is planned to be at 100kPa (normal atmospheric pressure) at a distance of 50 metres from the blast hydrophones will be placed in the water to measure this pressure; Department of Fisheries and Oceans guidelines to protect surrounding aquatic habitats and fish in the river have been built into the blast plan pre-blast scare detonations will be used disperse fish and wildlife from the area; Vibrations from the blast are being carefully controlled and as a precaution, to protect downstream fish habitat flows, the existing generating station will be briefly and temporarily taken off-line. Required water flows will be released down Elk Falls Canyon; The new tailrace stop logs will be protected from the blast by using cobbles and straw bales (above right photo); The boreholes (drilling shown in below right photo) will be verified for their respective depths prior to loading with explosives and adjusted as necessary to keep the overpressure shock wave at 100kPa at 50 metres, with minimal vibration; The total volume of the rock to be removed for the blast is estimated to be about 2,800 cubic metres; and The Canyon View Trail will be briefly closed just prior and during the blast event.