drilling
earth moving
dredger

slippery slope
rotec
Rock Scaling Plasma Rock Breaking debris flow mitigation
Rockfall marine services Spyder
AIS has a full fleet of dredging and marine construction equipment and the experienced personnel it takes to do the job right. AIS started out in marine construction working on docks, piers, seawalls and groins. Over the years we have expanded our capabilities to include hydraulic and mechanical dredging and pile driving. We also have a fleet of support vessels and equipment, plus a full fabrication shop that can build custom attachments to meet any need. Our fleet includes two all-electric hydraulic dredges, La Encina and the Santa Barbara, and the mechanical dredge, Augustus.
  The La Encina
La Encina
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La Encina
LOA 82', beam 28', draft 4'
Power 4160v AC
1250 pump hp, 2,200 total hp
Current depth capability 40'
18-inch discharge line
54' anchor handler, barge and tender
GPS navigation/location
  The Santa Barbara
santa barbara
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The Corrin
Santa Barbara LOA 70', beam 20',
   draft 1.5'
Power 4160v AC
Variable DC pump 900 hp,
      1800 total hp
Walking spud
Current depth capability 30'
Modular construction, truckable
In addition to our hydraulic dredges, our marine support equipment includes:

  • modular barges
  • hydraulic excavators
  • crane and clamshell
  • modernized LCM-6 landing craft
  • 500 hp push boat
  • tenders and crew boats


  • We add to our fleet every year, improving our ability to complete your project on-time and on-budget.
    rockfall drapery
      July 2010: AIS dredged 150,000 yards of toxic mud from Keswick Reservoir near Redding, California for CH2MHILL and the US-EPA. The work is part of EPA's cleanup of the acid mine drainage from the Iron Mountain Mine.

    mechanical dredge

    The Augustus  Mechanical Dredger: LOA 135' — Beam 42' — Draft 4'
    7 3/4 yard bucket — 50-foot maximum dig depth — 586 hp Liebherr — P984 Litronic excavator.
    The Augustus can also be fitted with special-purpose buckets, tongs, rotary head, etc.

    AIS offers coastal marine,
    harbor and lake construction services, including:
  • Suction or mechanical dredging
  • Pier and quay construction,       rehabilitation and repair
  • Seawalls and groins
  • Difficult-access work.