October 27, 2025

Protecting Critical Infrastructure – Trans Bay Cable Seismic Monitoring

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By Tony DePaolantonio

When it comes to safeguarding vital infrastructure, precision and proven expertise are non-negotiable. W5 Engineering delivered exactly that for Trans Bay Cable, implementing a state-of-the-art seismic monitoring system to protect their critical assets in the San Francisco Bay Area.

The Challenge

Ensuring the resilience of crucial power transmission infrastructure against seismic activity.

Our Solution

A comprehensive, turnkey seismic monitoring system deployed across key sites, demonstrating W5 Engineering's end-to-end capabilities from hardware to data analytics.

Project Highlights – What We Delivered:

Advanced Sensor Deployment:

  • (14) High-Resolution multi-axis MEMS Sensors: Strategically placed at transformer sites and on blast walls to capture minute seismic events.
  • (4) Wireless DS-WIFI Modules: Ensuring seamless data transmission across diverse locations, even with significant distances (verified up to 400 ft coverage per unit!).

Robust System Integration & Computing:

  • (4) Industrial-Grade PCs: Pre-loaded with industry-leading DEWESoft X and OPNET software for powerful data acquisition and analysis.
  • (4) SOLAHD DIN Rail UPS Systems: Providing uninterrupted power backup for critical monitoring operations.
  • 50” Supervisory Monitors: For crystal-clear, real-time data visualization, empowering immediate insights.
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Seamless Connectivity:

  • Expert Cabling: Full installation of armored CAT6 cable runs (approximately 500 ft per site with 14 terminations) ensuring durable and reliable connections.
  • Optimized Enclosures: Preconfigured with sealed ports and external antennas for maximum system integrity and performance.

Unwavering Annual Support:

  • Subscription-Based Maintenance: Ongoing system health monitoring and proactive support to guarantee continuous peak performance.

Site Overview – Where We Made an Impact:

W5 Engineering successfully implemented this sophisticated system across two critical sites:

  • Transformer 1 + Blast Wall: Equipped with (4) MEMS sensors (ground, lower, upper level, and blast wall), a DS-WIFI module, and an Industrial PC.
  • Control Room: Featuring a DS-WIFI module, an Industrial PC, and a 50” display for centralized monitoring and alerting.
  • Transformer 2: Outfitted with (2) MEMS sensors (lower and upper levels), a DS-WIFI module, and an Industrial PC.
  • Transformer 3: Outfitted with (2) MEMS sensors (lower and upper levels), a DS-WIFI module, and an Industrial PC.
  • Transformer 4: Also outfitted with (3) MEMS sensors (ground, lower, upper levels), a DS-WIFI module, and an Industrial PC.

In each instance, our DS-WIFI modules demonstrated their impressive range, verifying up to 400 ft of reliable wireless coverage.

Project Scope

W5 Engineering was selected to deliver and install a turnkey seismic monitoring solution across critical infrastructure sites for a major San Francisco Bay Area Utility company. Our scope included:


Deployment of high-resolution seismic sensors:

  • 11 MEMS sensors: Installed across transformer sites and blast walls
  • 4 DS-WIFI modules: Wireless data transmission across two locations
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System Integration and Computing:

  • 4 Industrial PCs preloaded with DEWESoft X and OPNET software
  • 4 SOLAHD DIN rail UPS systems for PC power backup
  • 50” Monitors for real-time data visualization

Cabling & Connectivity:

  • Full installation of armored CAT6 cable runs (~500 ft per site with 14 terminations)
  • Preconfigured enclosures with sealed ports and external antennas

Annual Site Support:

  • Ongoing maintenance and system health monitoring under subscription
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Site Overview: Two Sites on contract

Transformer 1 + Blast Wall

  • MEMS sensors (3x) at ground, lower, and upper levels
  • DS-WIFI module and Industrial PC: WiFi range verified: up to 400 ft coverage per unit.

Control Room

  • DS-WIFI module, Industrial PC, and 50” display: WiFi range verified: up to 400 ft coverage per unit.

Transformer 2

  • MEMS sensors (2x) at lower and upper levels
  • DS-WIFI module and Industrial PC: WiFi range verified: up to 400 ft coverage per unit.

Transformer 2

  • MEMS sensors (2x) at lower and upper levels
  • DS-WIFI module and Industrial PC: WiFi range verified: up to 400 ft coverage per unit.

Transformer 4

  • MEMS sensors (3x) at ground, lower, and upper levels
  • DS-WIFI module and Industrial PC: WiFi range verified: up to 400 ft coverage per unit.
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