Difficult Access Drilling Specialists                                                                               
     'We're the best Dam drillers in the business' 
What we do

A Little About Our Latest Drilling Projects and Specialisation 

Specialisation

The majority of the Mulligan Geotechnical drilling projects involve difficult access. When our clients can't figure out how to get holes in required locations, they often call on Mulligan Geotechnical. Our ability to perform these projects rely on three factors:  
  • We have experienced personnel who can safely establish site access
  • We have equipment that can be utilised in restricted access areas 
  • We have the capacity to modify or build equipment to suite the access restrictions

Dams

Mulligan Geotechnical is a leader in dam specialisation. Some of our drilling projects are the first steps towards the construction of new dams, pump back systems and upgrades.
  • Installation of Rockbolts, Stress Bars, Multi-strand anchors
  • Uplift pressure holes
  • Investigation
  • Drainage holes
  • Instrumentation
  • Pressure Grouting
  • Rehabilitation work within galleries, crests, aprons and spillways.
Our new purpose-built difficult access gallery rig has the precise dimensions and capabilities for these applications.
Dam Gallery Drilling Rig

Slope Stabilisation 

 We work in all manner of difficult access situations, road and landslip sites, cliff faces, mountains, batters, rivers and dams.
Services supplied:
  • Rock bolting, soil nails, anchors
  • Rock scaling, de-vegetation
  • Industrial rope access
  • Mitigation
  • Catch fences and rockfall barriers
  • Meshing
  • Drainage holes
  • Shotcrete
  • Formwork, Concreting and Grouting
  • Boulder Demolition
Stabilisation, EWP, drape mesh, rock bolts, soil nails, drilling
Lawrence Hargrave Drive

Geotechnical

Our team at Mulligan Geotechnical have safely and effectively provided geotechnical services investigation on an array of large and small scale projects across Eastern Australia.

Environmental
  • Monitoring well installation
  • Direct push sampling
  • Landfill geotechnical sampling & instrumentation
  • Sonic drilling
  • Insitu ground water sampling
  • Solid and hollow stem auger.
  • Water, Soil and Contamination Investigation
Investigation
  • Drill rigs with multiple capabilities
  • Inclined and vertical drilling
  • Tubex and Robit Systems
  • Earthing Grid Holes
Instrumentation
  • Vibrating wire piezometers
  • Split sample testing
  • Undisturbed samples
  • Lugeon (water pressure)
  • Pressure grouting using inflatable packers
  • Pressure metre testing overcoring
  • Down hole surveys
  • Core orientation
  • SPT's
Snowy Hydro 2.0

Grouting

Our grouting experience is utilised for the installation of grout curtains, ground modification, pressure grouting of blowout holes, structural grouting and other drilling and grouting applications.

Boulder Anchoring Falls Creek

Previous Projects

Some of our previous projects include: 
  • Cotter Dam Enlargement Project - ACT                                        
  • Burdekin Falls Dam Foundation Drainage - QLD
  • Woolgoolga to Ballina Hwy Upgrade - NSW
  • Lawrence Hargrave Drive Slope Stablisation 1998
  • Clyde Mountain Kings Hwy, Alpine Way, Kosciuszko Rd, Snowy Mountains Hwy, Cabramurra Road, Kennedy Hwy slope stablisation.
  • Sturt Dam Improvement Project - SA
  • Snowy Hydro 2.0 Feasibility Study - NSW  
  • Shoalhaven Pumpback System - NSW
  • Warragamba Dam Raising Feasibility Study - NSW
  • Fairbairn Dam Upgrade - QLD
  • Abbot Point Expansion Project - North QLD                                          
  • Palm Island - QLD
  • Port Vila Harbour Wharf Upgrade - Vanuatu 
  • Forth River Dams Upgrade - Tasmania
  • Slope Remediation Thredbo post slip
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