ER-27(008) Kaumualii Hwy Drainage Imp Vic of Omao Stream Bridge

The State of Hawaii Department of Transportation is requesting proposals for drainage improvements at Kaumualii Highway in the vicinity of Omao Stream Bridge (Federal-Aid Project ER-27(008)), with offers due October 29, 2026 at 2:00 p.m. Hawaii Standard Time. Bidders must possess a valid State of Hawaii General Engineering "A" license prior to award — the core eligibility requirement.

The scope encompasses demolition of existing drainage structures and pavement; abandonment in place of a 24-inch reinforced concrete pipe (RCP) with controlled low-strength material (CLSM); installation of a new 42-inch reinforced concrete pipe with drain manhole, grated drain inlets, and concrete outlet structure; installation of grouted rubble paving, reinforced concrete apron, asphalt concrete pavement, chain link fencing, and erosion control matting; and site preparation including clearing, grubbing, excavation, backfilling, grading, and grassing. The project encompasses two installation methods: microtunneling or pipe jacking from Stations 0+00 to 7+82.80 within Kaumualii Highway pavement (7 to 22 feet below existing grade) and open-trench installation from Stations 7+82.80 to 11+61.88 along the unpaved shoulder. Geotechnical conditions consist of fills, residual soils, and saprolitic soils; relict boulders and hard basalt ledges may complicate microtunneling operations. Soil is categorized as Category A (Moderately to Severely Corrosive), requiring consultation with a professional corrosion engineer for pipe protection.

The estimated construction cost ranges from $10 million to $11 million. The contractor must perform at least 30 percent of contract work with its own organization. Monthly progress payments will be issued without retainage; all subcontractors must be paid within 10 calendar days of contractor receipt of payment from HDOT.

A virtual pre-bid conference is scheduled for October 8, 2026 at 10:00 a.m. HST via Microsoft Teams (attendance encouraged but not mandatory). Requests for Information and Substitution Requests must be submitted by October 15, 2026 at 2:00 p.m. HST. The project is subject to Davis-Bacon wage determinations and federal nondiscrimination requirements. HDOT has suspended race-conscious DBE contract goals pending completion of DBE certification reevaluation.

Bidders must register and submit proposals through HIePRO.