Valley Link Viaduct

P—104

1.6 km

Length

Valley Link Viaduct

Client

State DOT

Client

State DOT

Location

Boise, ID

Sector

Infrastructure

Delivery

Design-build

Value

$420M

Duration

40 months

Status

In progress

Year

2027

§ 01 — Overview

A 1.6 km curved viaduct built without closing the valley road

The challenge

A 1.6 km curved viaduct over a valley floor that carries the only local road and a protected creek.

Engineering approach

We chose a launched-girder scheme that kept all heavy plant on the deck, eliminating falsework in the valley except at one span.

Execution

Pier heads were precast and lifted into position, cutting the time spent working above the road by roughly half.

§ 05

Key metrics

1.6 km

Length

Piers

Road closures

612

Precast segments

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