4065 Fincham Road, Riverside, CA 92507  ·  Mon–Fri 8:00–17:30 ☎ 760-478-9819  ·  career@geotehnica.com
Services

Geotechnical engineering, end to end.

From the first parcel walk-through to the final compaction report, we handle the full geotechnical lifecycle of your project — without hand-offs, without outsourced authors, and without surprises at plan-check.

01

Preliminary Site Assessment

Desktop review of geologic maps, historical aerials, fault databases and prior reports so you can price a site before you buy it.

02

Subsurface Investigations

Hollow-stem-auger and rotary-wash borings, CPTs, test pits and geophysical surveys with drilling logs stamped by a California GE.

03

Soil & Aggregate Laboratory

In-house AASHTO-accredited lab: index tests, R-value, direct shear, consolidation, expansion index, sulfate and corrosivity.

04

Foundation Engineering

Recommendations for spread footings, mat foundations, drilled piers and driven piles — with settlement and bearing capacity envelopes.

05

Seismic Hazard Studies

Site-specific response analysis, liquefaction and lateral-spread evaluation, and Alquist-Priolo fault-rupture investigations.

06

Slope Stability

Static, pseudo-static and dynamic analyses (SLIDE, SLOPE/W) with remedial recommendations for cut slopes, fills and existing landslides.

07

Retaining & Shoring

Lateral earth pressure diagrams, tie-back walls, soil-nail walls and MSE-wall geotechnical parameters.

08

Pavement Design

Flexible and rigid pavement sections for private drives, industrial yards and city streets — Caltrans and Riverside County methods.

09

Grading & Earthwork Plans

Remedial-grading recommendations, over-excavation limits, keyway design and moisture-conditioning specifications.

10

Construction Observation

Full-time and part-time observation of rough grading, backfill, pier drilling and subgrade preparation.

11

Compaction Testing

Nuclear density (ASTM D6938) and sand-cone testing with same-day results distributed to the project team.

12

Peer Review & Expert Support

Third-party review of geotechnical reports, expert declarations, and construction-defect investigation support.

Sectors we serve

Whatever you're building, we've engineered the ground for it.

  • Custom & production residential (flat and hillside)
  • Multi-family and mixed-use developments
  • K–12 and higher-education campuses
  • Municipal buildings and public works
  • Industrial, warehouse and logistics facilities
  • Renewable energy — utility-scale solar and BESS pads
  • Telecommunications monopoles and towers
  • Retail, hospitality and quick-service restaurants
Hillside residence with engineered retaining wall system

Not sure which service you need?

Send us the site address and a short description. We will scope the right investigation and quote a fixed fee.

Get a Fixed-Fee Proposal