Okahara and Associates, Inc.

A Local Engineering Firm Serving Our Community

About the firm

Okahara and Associates, Inc. is a Hawaii-based multi-discipline engineering corporation established in 1979, with offices in Hilo and Honolulu. Okahara provides civil engineering, mechanical engineering, and landscape architecture services to government agencies, public utilities, and private clients across the Hawaiian islands. Originally focused on mechanical equipment design for the sugar mill industry, Okahara expanded into HVAC, plumbing, and fuel systems in the mid-1980s and later added civil infrastructure and land development services. Current project work ranges from wastewater trunk sewers and water system improvements to highway design, airport apron repaving, and public park landscaping.

Established: 1979
Team: Small
Firm type: Civil Engineering · Mechanical Engineering · Landscape Architecture

Capabilities

Civil Engineering

Okahara provides a full range of civil engineering services for public and private clients throughout Hawaii.

Site Work Design
Subdivision Design
Highway Design
Water System Design
Wastewater System Design
Hydrologic / Hydraulic Design
Watershed Studies
Permitting
Airport and Airfield Design
Harbor and Boat Ramp Improvements
Drainage Studies and Planning

Mechanical Engineering

The mechanical engineering practice covers building systems and utility infrastructure for municipal, institutional, and correctional facility clients.

Pump Station Design
HVAC System Design
Plumbing System Design
Fuel System Design
Energy Efficiency Design
Retro-commissioning

Landscape Architecture

Landscape architecture supports site, park, roadway, and public-space projects across Hawaii.

Landscape Design
Irrigation Design
Landscape Lighting Design
Landscape Construction Management and Consultation
ISA Certified Arborist Consultation

Industries

Government · Water Supply · Wastewater · Highways & Roads · Aviation · Parks & Open Space · Justice & Corrections · Stormwater & Flood Control

Projects

Awa Street Wastewater Pump Station Force Main and Sewer System Improvements - Waiakamilo Road Trunk Sewer

Honolulu, HI · Wastewater · 2018 · Client: City and County of Honolulu

Project details

Prime, civil, and mechanical consultant on a $120 million project involving replacement of over a mile of gravity trunk sewer installed via microtunneling along Waiakamilo Road and Houghtailing Street in Honolulu. Design and bid package included sewer line installation, utility relocations, geotechnical guidance, structural design, traffic control plan, permitting, noise variance, and environmental assessment. Construction began 2018.

Saddle Road, PTA Phases 1, 2, 3 & East Side Phases 1 & 2

Big Island, HI · Highways & Roads · Client: Federal Highway Administration / Hawaii Department of Transportation

Project details

Prime consultant on six construction contracts totaling 30 miles of realigned or reconstructed road under an FHWA IDIQ. Performed all civil engineering and project management, led consultant team covering environmental, geotechnical, surveying, structural, and electrical disciplines, and assisted with permits and rights-of-way.

Pi'ihonua Reservoir No. 2 Replacement

Island of Hawaii, HI · Water Supply · 2005 · Client: County of Hawaii

Project details

Design documents for a new 2.0 million gallon concrete reservoir and booster pump station, including connections to existing waterlines, SCADA instrumentation and controls, facility piping, earthwork, drainage, and demolition of the existing Piihonua Reservoir No. 2.

Neal Blaisdell Center - Administration Building Air Conditioning System Improvements

Honolulu, HI · Government · 2010 · Client: City and County of Honolulu

Project details

Prime and mechanical consultant for replacement of a roof-mounted, air-cooled chiller plant serving the Neal Blaisdell Center Administration Building. Scope included cooling load modeling, equipment replacement, air system rebalancing, and construction phasing. Construction cost: $240,000.