Arrowgate Depot EV Integration

Year

2025

Model

EV Yard (30 x DC120kW)

Location

Arrowgate Depot - Montana

Executive Summary

RCE Civils & Earthmoving was appointed to deliver a turnkey infrastructure upgrade within a live Golden Arrow Bus Services depot environment. The project required integrated structural and pavement engineering to support high-frequency fleet operations under dynamic axle loading conditions. The works formed part of a broader depot modernisation initiative, requiring strict programme control, density compliance and coordination with operational site constraints.

Scope of Works

Engineered gabion retaining wall system to mitigate lateral earth pressure
Double-skin reinforced boundary wall with structural column cores and concrete infill
Heavy-duty reinforced concrete slab designed for repetitive bus loading
Subgrade correction and formation preparation
Compaction verification and QA/QC documentation
Drainage coordination and surface fall control

Executive Summary

RCE delivered the civil enabling infrastructure for the integration of high-capacity DC120kW electric bus chargers within the existing Arrowgate depot. The layout was engineered in a fishbone configuration, enabling a single charger to service four buses, optimising spatial efficiency and operational flow. This project required precise dimensional control, underground reticulation coordination and phased construction within a live fleet environment.

Scope of Works

Fishbone charging yard layout design integration
Reinforced concrete plinth design and casting for DC120kW chargers
Excavation and trenching for MV/LV reticulation routes
Installation of sleeves and duct banks
Island construction and kerbing
Surface preparation and paving prior to demarcation
Yard compliance marking readiness

Scope of Works

Engineered gabion retaining wall system to mitigate lateral earth pressure
Double-skin reinforced boundary wall with structural column cores and concrete infill
Heavy-duty reinforced concrete slab designed for repetitive bus loading
Subgrade correction and formation preparation
Compaction verification and QA/QC documentation
Drainage coordination and surface fall control

Engineering & Delivery Complexity

Charger alignment tolerances requiring millimetre-accurate plinth positioning
Service-dense excavation management
Reticulation coordination within existing underground networks
Load-bearing surface integration with heavy bus operations
Phased sequencing to maintain depot functionality

Outcome & Strategic Impact

The integration supports fleet electrification at scale and demonstrates RCE’s capability in high-density charging yard infrastructure within constrained operational environments.