Core Capability

DEEP DRAINAGE

Executing complex outfall and drainage infrastructure in highly sensitive and constrained locations across the North West.

Executing complex outfall and drainage infrastructure in highly sensitive and constrained locations across the North West.

Executing complex outfall and drainage infrastructure in highly sensitive and constrained locations across the North West.

6.0m

Max Trench Depth

1500mm

Max Pipe Dia.

S104

Adoptable Standard

Service Breakdown

SCOPE OF
WORKS.

01

Main Sewer Connections

Precise connection to existing highly-pressured or deep main sewer networks, managing live flow and extreme water table logistics safely.

01

Main Sewer Connections

Precise connection to existing highly-pressured or deep main sewer networks, managing live flow and extreme water table logistics safely.

02

Attenuation & Soakaways

Installation of large-scale offline cellular storage tanks and advanced SUDS (Sustainable Urban Drainage Systems) for major residential developments.

02

Attenuation & Soakaways

Installation of large-scale offline cellular storage tanks and advanced SUDS (Sustainable Urban Drainage Systems) for major residential developments.

03

Complex Shoring & Temporary Works

In-house design and deployment of heavy-duty trench boxes, drag boxes, and hydraulic bracing to guarantee 100% safety in constrained excavations.

03

Complex Shoring & Temporary Works

In-house design and deployment of heavy-duty trench boxes, drag boxes, and hydraulic bracing to guarantee 100% safety in constrained excavations.

04

Adoptable Systems

Full delivery of Section 104 adoptable drainage, ensuring rigorous testing, CCTV surveys, and immediate local authority sign-off without delays.

04

Adoptable Systems

Full delivery of Section 104 adoptable drainage, ensuring rigorous testing, CCTV surveys, and immediate local authority sign-off without delays.

Execution & Machinery

ENGINEERED
FOR DEPTH.

Deep drainage is high-risk engineering. We do not rely on third-party plant hire. GRS utilises its wholly-owned fleet of heavy excavators and specialized shoring equipment to control the critical path and eliminate downtime.

Technical Specs

Technical Specs

Technical Specs

Direct Workforce

Direct Workforce

Direct Workforce

Hydraulic Shoring Systems

Hydraulic Shoring Systems

Hydraulic Shoring Systems

Dewatering & Overpumping

Dewatering & Overpumping

Dewatering & Overpumping

Laser Guided Pipelaying

Laser Guided Pipelaying

Laser Guided Pipelaying

GALLERY

Next Steps

READY TO BREAK GROUND?

Engage our delivery team for your upcoming deep drainage or infrastructure package.

OR SPEAK TO THE TEAM DIRECT:

01744 410600

North West Civil Engineering.

Built on heritage. Driven by absolute by absolute delivery.

Collins Industrial Estate, Merton Bank Road, St. Helens, Merseyside, WA9 1HY

2026 GRS Contractors Ltd.All rights reserved.Registered in eEngland & Wales.

North West Civil Engineering.

Built on heritage. Driven by absolute by absolute delivery.

Collins Industrial Estate, Merton Bank Road, St. Helens, Merseyside, WA9 1HY

2026 GRS Contractors Ltd.All rights reserved.Registered in eEngland & Wales.

North West Civil Engineering.

Built on heritage. Driven by absolute by absolute delivery.

Collins Industrial Estate, Merton Bank Road, St. Helens, Merseyside, WA9 1HY

2026 GRS Contractors Ltd.All rights reserved.Registered in eEngland & Wales.