INNOVATION-May-June-2020

WAC BENNETT DAM SPILLWAY HOIST EQUIPMENT UPGRADE As part of upgrading the spillway gate hoist system, Pacific Rim Engineered Products (PREP) designed, assembled and installed hoist gearboxes for replacement of existing 1960s-era equipment. PREP engineered and assembled six gearbox assemblies (151:1 reduction), providing 155,000 foot-pounds of torque output. The new gearboxes have updated gear lubrication, modern controls interfaces (encoder, limit switches), and are of two-piece design to facilitate servicing. New gear geometry meets strict overload and seismic requirements, improving on the original powertrain. PREP removed the original equipment and installed new gearboxes and equipment, mounting to original hoist drums and frames, and aligned

PROJECT HIGHLIGHTS 2O19 | 2O20

equipment with laser tooling. Partial opening tests of the 215-ton radial spillway gates were performed, with final commissioning scheduled for Spring 2020. Owner: BC Hydro. Primary Contractor: HMI Construction Inc.–An Andritz Company. Engineering and installation by PREP: J. Deagle, P.Eng., P. Cave, P.Eng., R. Johal, P.Eng., M. Willms, P.Eng., P. Bose, M. Lapp.

STORMWATER DIVERSION FROM WASTEWATER TREATMENT SYSTEM In recent years, increased storm intensities have resulted in higher volumes of stormwater at this Lower Mainland railyard. Road runoff and stormwater collected in the fuel tank farm containment (pictured) was treated through the on-site wastewater treatment plant prior to discharging to sanitary. A stormwater diversion system was designed/installed to separate clean stormwater from industrial inputs. Controls remain in place at the fuel tank farm, that in the event of a spill, that flow would still be diverted to the industrial wastewater plant for containment and treatment. A secondary pump was added to the tank farm containment and a new stormwater piping network and oil water separator were installed prior to surface water discharge, resulting in reduced emergency response, operations and maintenance costs, and permit discharge fees. Owner: Canadian National Railway: Mike Linder, Seble Afework, P.Eng. (PEO). Primary consultant: Keystone Environmental: Christina Chan, P.Eng., Dr. Francisco Perelló, P.Eng., Antonia Gunardi, P.Eng., Mathew Barker, P.Eng. Primary contractor: Matcon Environmental.

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