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Electrical Engineering

BHC electrical engineering staff provides complete electrical design services for a wide variety of projects. Our staff has extensive experience on large and small projects for owners, developers, architects, engineers and municipal, state, and federal government agencies. We provide cost effective designs in the following areas:

GENERAL ELECTRICAL ENGINEERING SERVICES

  • Power distribution
  • Instrumentation and control systems
  • Lighting
  • Generator systems
  • UPS systems
  • Grounding systems
  • Lightning and surge protection
  • SCADA and telemetry systems
  • Fire alarm and life safety systems
  • Value Engineering
  • Peer Reviews
  • Code Compliance Reviews
  • Renovations and Upgrades
  • Construction Engineering Services

ELECTRICAL PROJECT TYPES

  • Wastewater Treatment Facilities
  • Water Treatment Facilities
  • Pump Stations
  • Solid Waste Facilities and Landfills
  • Commercial buildings
  • Offices
  • Airfield Lighting and Terminals
  • Data centers
  • Industrial and Manufacturing Facilities
  • Mining and Mill Facilities
  • Substations
  • Tunnels and Roadways


     


 



 

Electrical Project Briefs

Lacey LS18Standby Generator for Lift Station 18, City of Lacey, WA
BHC performed a load study, provided generator sizing calculations using three different generator manufacturer’s sizing software, and provided a technical memorandum for City review. Based on the recommendations of the memorandum, BHC provided bid documents, plans, specifications, and cost estimate for the installation of a new standby generator to replace the existing one that was undersized.


 

SnoqaulmieStandby Generators, City of Snoqualmie, WA
BHC designed the installation of four standby generator sets at four sites for the City's water department. The generators ranged in size from 20kW to 500kW. All generators were designed with sound-attenuating enclosures or located inside buildings with sound-attenuation to mitigate noise propagation to residential areas. New automatic transfer switches were installed at each site. Modifications were made to the existing SCADA and telemetry systems for generator status and alarms. Each site was designed with fuel storage for a full 7-days of run time at full load. Double-walled, free-standing tanks and double-walled piping with leak detection was provided. BHC also provided services during bidding and construction.

Des Moines Creek Wastewater Treatment Plant Variable Frequency Drive Replacements, Midway Sewer District, Des Moines, WA
BHC designed the replacement of ten variable frequency drive systems, ranging in size from 1 hp to 200 hp.  The 200 hp systems were designed with 18-pulse drives to reduce harmonics and maintain compliance with IEEE 519.  Control upgrades included industrial ethernet control and power monitoring of pumping systems.  The project included replacement of 200hp vertical pump motors on the trickling filter pumps.

Manchester Pump Stations Nos. 45, 46, & 47 Upgrades, Kitsap County, WA
BHC designed the replacement of Kitsap County’s Pump Stations Nos. 45, 46, and 47.  The pump stations are located along the Puget Sound beach line in Manchester, Washington and were identified as aging and in need of complete replacement. New electrical services, metering, automatic transfer switches, standby generators, control panels, and lighting were provided.  The existing radio telemetry systems were reused for the new stations.  New submersible pumps and wetwell level controls were designed per NFPA 820.  Generators were provided with weather and sound-attenuating enclosures and located to reduce visual impacts from neighboring properties.

On-Call Wastewater Services, Lakehaven Water & Sewer District, Federal Way, WA
BHC has been providing on-call engineering services for Lakehaven Water and Sewer District’s (District’s) Redondo and Lakota WWTPs since 2011. BHC is currently working with the District to replace and upgrade the existing UV disinfection system at both the Lakota and Redondo WWTPs.  These new UV disinfection systems will be essentially identical in size and layout, except that the Redondo WWTP installation will also include addition of effluent filtration. BHC has also been providing assistance to the District to replace the existing reciprocating rake bar screens with new multi-rake bar screens at the Lakota WWTP, evaluate the aeration system at the Lakota WWTP, and optimize the interim chlorine disinfection system at the Lakota WWTP.  BHC provided electrical and control system designs for UV systems, including power distribution to UV modules, weir and control gates, and UV control panels.

2016 Source of Supply Improvements, West Sound Utility District, Port Orchard, WA
BHC designed the replacement storage and booster pumping facilities for the District’s Well 1 and 5 production site. The new facilities include a welded steel tank with roof-mounted aeration equipment for hydrogen sulfide stripping and a package pumping replacement system with controls and enclosure. The design included new electrical distribution, panelboards, solid-state soft starters, and control upgrades.

BHC designed the installation of Well 22 for municipal production at another District property, including submersible vertical turbine pump, pump building with controls and chemical (sodium hypochlorite, sodium fluoride) injection systems.  The well building was provided with a new electrical service, motor control center, variable frequency drive system, heating, ventilation, lighting, and radio telemetry system.

Cougar Mountain 3 Pump Station Rehabilitation Preliminary Design, City of Bellevue, WA
BHC completed the design of the City of Bellevue Cougar Mountain 3 Pump Station (CM3) Rehabilitation in March 2017. The project included a new utility transformer and primary extension, new electrical service, metering, automatic transfer switch, standby generator system, motor control center, variable frequency drives, controls, telemetry, security, CCTV, lighting, grounding, and redundant instrumentation.

The generator was designed with a water cooling system to minimize openings for air in the existing structure.  Sound attenuation was provided to minimize noise impacts to neighbors.  Harmonic mitigation and passive filtering was provided to maintain compliance with IEEE 519.

District Engineering Services, Salmon Creek & Miller Creek WWTPs, Southwest Suburban Sewer District, Burien, WA
BHC Consultants has provided District engineering services since 2009 and has completed numerous projects for the Miller Creek and Salmon Creek WWTPs. Currently, BHC is designing the comprehensive rehabilitation and expansion of the solids handling facilities at the Salmon Creek WWTP. This project includes the installation of a new anaerobic digester, new retaining walls, new dewatering equipment, digester covers, new digester mixing system, truck scale and building, new staff office and laboratory building, new odor control, and new sodium hypochlorite systems. The project includes an upgraded electrical service, new standby generator, automatic transfer switches, motor control centers, variable frequency drives, LED lighting, PLC control panels, and new SCADA system.

Sludge Dewatering and Blower Replacement, City of Edmonds, WA
BHC was retained by an Energy Services Company (ESCO) to provide engineering services for a project to replace the City’s existing belt press sludge dewatering system with a new screw press as an energy saving project.  Our services included preparing pre-design concept drawings and cost estimates, assistance with selecting the preferred equipment, negotiating the performance guarantee, and preparation of the plans and specifications for the equipment installation.  The FKC dewatering equipment were pre-purchased by the ESCO.  The design integrated the new equipment into the existing electrical distribution and control systems.

As a separate project, BHC designed the installation of new high-efficiency Aerzen hybrid blowers at the wastewater treatment plant.  New dissolved oxygen sensors were installed in the aeration basins.  New flow sensors and automated valves were installed to provide better monitoring and control.

 

 

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