Triad/Holmes Associates (THA) has been providing a comprehensive range of civil engineering, land surveying and mapping services for over 30 years. We have extensive experience with commercial, residential, institutional and public works projects.
Construction Phase Services
Grading and Drainage Designs & Plans
Project Development and Entitlement Assistance
Septic System Designs and Plans
Site Planning and Mapping
Storm Water Pollution Prevention Plans (SWPPP)
Water, Sewer, and Storm Drainage Studies and Design
Elevation/Forms/Slab Certificates
Building Location Survey
Title Insurance Surveys (ALTA)
Construction Staking Surveys
Monitoring & Deformation Surveys
Aerial Mapping & Photography
Contact our offices in the Eastern Sierra, the San Francisco Bay Area, the Central Coast, or the Napa Valley and start benefiting
from our broad experience and excellent reputation.
We look forward to hearing from you.
Website Design by Fox Consulting
Branches and additional offices:
(760) 934-7588549 Old Mammoth Rd Mammoth Lakes, CA 93546
(760) 375-8400500 Scott St Ridgecrest, CA 93555-3312
(650) 366-0216777 Woodside Rd Ste 2A Redwood City, CA 94061-3799
(925) 485-10801061 Serpentine Ln Pleasanton, CA 94566-4800
(760) 873-4273873 N Main St Bishop, CA 93514-2433
(805) 544-8908555 Chorro St Ste A1 San Luis Obispo, CA 93405-2397