Location: Mouth of the Columbia River
Repair included import and placement of about 71,000 ton of riprap on the north jetty at the mouth of the Columbia River. Tapani Inc. purchased and used a 1200 Hitachi Excavator and had a custom built rock grapple for picking and setting the jetty rock. The objective of the project was to repair the jetty so that the ocean waves wouldn’t break a hole through it. To protect the river channel (for commerce), it was crucial to complete the project before the winter.
Completing the work before the coastal winter storms hit was crucial for this project. Also, finding enough jetty rock that met the rock specification to complete the project was a challenge.
Severe winter storms pummel the coast annually, damaging the protective jetty at the mouth of the Columbia River. The jetty allows commercial ships to safely use the river channel year-round, despite inclement weather. The damage to the jetty had grown so severe that the Portland Corp. of Engineers was concerned that this would be the winter that the ocean waves would break a hole through the jetty, bringing a halt to river commerce. Tapani Inc. was hired to repair the jetty, importing and placing about 71,000 tons of riprap. To complete the project, Tapani purchased and used a 1200 Hitachi Excavator and had a custom built rock grapple for picking and setting the jetty rock.
It was crucial that all repairs be completed before winter closed in, to prevent further damage not just to the jetty, but to the local economy. Only natural rocks meeting a very particular set of specifications could be used effectively in the jetty, requiring creative sourcing and strong vendor relationships to import enough rock on time.