TransportationCentral Subway
A 3.1-mile underground extension of the Market Street subway, delivering twin bored tunnels, three underground stations and a cavern beneath an operating city centre.
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Advisory Consulting
Our consulting services go deeper than design — we advise at every stage of project development.
Countless options exist for getting from Point A to Point B underground. There are also critical and unique factors specific to you and your project. We shape the correct path from Day 1 with our all-around underground expertise, problem-solving skills and forward thinking.
We collaborate with you to align the project alternatives with the key factors that matter to you — capital cost, programme, risk, third-party impact, constructability and long-term operating cost — and we will tell you when an option you like does not survive the analysis.
Where we advise
- Feasibility and alignment evaluations
- Planning-level studies and business cases
- Options appraisal and value engineering
- Third-party design and constructability review
- Ground investigation strategy and scoping
- Risk assessment and mitigation planning
- Procurement and contract packaging advice
- Programme and project management
Procurement expertise
- Design-build
- Progressive design-build
- Design-bid-build
- Alliances and collaborative models
- CMGC / CMAR
- Cost-plus and target-cost structures
What you get
- A recommendation, not a menu
- Documented basis for every decision
- Risks identified before they are priced
- Clear comparison of cost, time and risk
- A team that has delivered the work it is advising on
This service, in practice.
Projects using Advisory Consulting.
TransportationCentral Subway project details
TransportationNorthgate Link Extension
A 4.4-mile light rail extension including two cut-and-cover stations, a cut-and-cover crossover and 2.5 miles of underground guideway.
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TransportationSydney Metro City & Southwest
Metro-scale station caverns and twin running tunnels on Australia’s largest urban rail programme.
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TransportationCaldecott Improvement Project
A four-bore highway tunnel through the Oakland Hills, including a 3.5-mile bore and seismic retrofit.
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TransportationSR 99 Alaskan Way Viaduct Replacement
A four-lane, four-block downtown viaduct built as a structurally independent tunnel beneath a working street.
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TransportationCoos Bay Rail Tunnel Rehabilitation
Rehabilitation and rock-lining repair of six miles of historic single-track rail tunnel in basalt.
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We rarely work in only one discipline.
Tunnels & Underground Engineering
From feasibility studies to detailed design, to engineering and management services during construction.
Trenchless Engineering
Consulting services for small-diameter tunnels and trenchless technologies.
Tunnel Inspection & Rehabilitation
Inspection and rehabilitation services that improve the safety, functionality and longevity of underground structures.
Engineering Consulting
Multi-disciplinary engineering, analysis and digital delivery for complex underground assets.
Construction Management
Good construction management paves the way for safe, efficient project execution.
Construction Claims Services
Contractual clarity from notice to resolution, supported by forensic engineering.
Talk to the engineers who do the work.
Every enquiry is reviewed by a principal engineer in the relevant practice — not a sales team. If your question is a technical one, you will get a technical answer, and if we are not the right firm for the job, we will say so.
Or email us directly at support@hoffmantunnels.com.
