Projects
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Project Profiles Industrial/Commercial Environmental Mitigation/ Contract List
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Project Detail
This Pier is commonly referred to as the Ammunitions Pier and is located at the mouth of San Diego Harbor on the westside of NAS North Island. With aftermath of 9/11, added security and use of this pier was radically increased. Marathon had to coordinate on a daily basis all operations around weapons loading and unloading. All priority was given to the Navy to insure proper and safe transfer of weapons back and forth from land to ship. This project required the complete concrete and rebar replacement on the top deck (top 5" to 6") of the pier surface. The utilized procedure was to hydro-demolish the deck with a high-pressure water demolition machine. This machine averaged 400 to 600 SF per day. Simultaneously, the areas that that machine could not reach, hand concrete demolish was performed. After one half of the pier was demolished to the prescribed depth and the old rebar was removed and new rebar installed, grade and flow was re-established with a 6" concrete overlay. After the deck in the first phase had cured to strength, a similar operation was performed on the second half. Additionally, the contract required the complete replacement of the primary and secondary fendering systems. While the concrete rehabilitation was being performed, the both fendering systems were removed and replaced. Installed were 64 each new 24" square x 75 foot PC/PS concrete piling. Additionally installed were over 200 each 14" diameter fiberglass/concrete composite piling for the secondary fendering system. Again, all this work was performed within a one year period while leaving at least half of the pier open for use by the Navy.
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CA License No. 411338 A, B