Tillamook Bay Entrance, North Jetty

Location: Tillamook, OR
Client: Kiewit Pacific

An apparent increase in the Pacific Ocean wave climate exposed the Tillamook Bay jetties to more extreme storm waves, which resulted in damage to the jetty heads, trunks and north jetty root. Kiewit Pacific Co. selected Otak to be part of Tillamook North Jetty capping project team. Otak supported the project’s goal of procuring and placing stone to repair the jetty by providing horizontal and vertical survey control data. The Otak team also assisted with the calibration of GPS equipment that was used during the construction phase; provided topographic mapping of the jetty; and performed earthwork volume calculations. This work also required adjusting the Corps-designed repair to fit existing ground conditions and available rock quantities.