Case Study: A Facelift on Alcatraz Island

Words: Dan Kamys

May 2013

Case Study: Rehabs and Restorations

Case Study: A Facelift on Alcatraz Island

QUIKRETE Cos. recently supplied shotcrete in 3,000-pound bulk bags for a restoration project on Alcatraz Island, also known as “The Rock.”

The QUIKRETE Cos. recently supplied shotcrete in 3,000-pound bulk bags for a restoration project on Alcatraz Island, also known as “The Rock.”

Boulderscape, a design architect specializing in shotcrete application, used QUIKRETE Shotcrete MS – Fiber Reinforced and QUIKRETE Shotcrete MS to successfully repair and stabilize a failing slope on the 22-acre island.

In addition to facing dangerous application conditions, a condensed six-week shotcrete schedule was required to avoid disruptions to regular tour operations, while considering the habitat and migration patterns of local sea birds. “Navigating a variety of unique factors made this a very fulfilling project for everyone,” says Steve Jimenez, senior VP commercial sales for Boulderscape. “We couldn’t start until the indigenous birds migrated from the island in November, and we had to complete our portion of the work before the birds returned in February. “This meant everything had to be expedited, starting with the delivery of material,” he continues. “Beyond the challenging schedule, the application process was full of danger. The nozzlemen had to be hoisted more than 60 feet in lifts to spray-apply the shotcrete before sculptors repelled down the cliff to shape the material. The end result was a structurally sound slope that matched the surrounding environment.” In one weekend, 131 bulk bags of Shotcrete MS – Fiber Reinforced and 126 bulk bags of Shotcrete MS were delivered to Alcatraz Island for the project. QUIKRETE delivered16 truckloads of material to Pier 50 in San Francisco that were later shipped on two barges to Pier 33 on Alcatraz Island. It was offloaded at night by crane, one-by-one, before finally being transported to the jobsite on trailers pulled by four-wheel, all-terrain vehicles. Shotcrete MS – Fiber Reinforced is a single-component Micro Silica enhanced repair and restoration material that achieves more than 9,000 PSI at 28 days, and features very low rebound and permeability characteristics.
For more information on QUIKRETE and its products, visit www.quikrete.com, like it on Facebook and follow it on Twitter @QUIKRETE.
Return to Table of Contents
Chairman’s Message: VALUE IN REVIEWING OUR YEAR
December 2025

My father used to have a way of teaching me lessons by purposefully not intervening when I struggled. He thought if I felt at least a little of the pain of a potentially bigger mistake, I’d come out of it wiser and more prepared for the next time. He woul

Dick Dentinger
Chairman’s Message
Read More
Outreach Outlook: A Year of Momentum and Building Our Future Together
December 2025

As 2025 draws to a close, it’s a natural time for reflection. This month marks a personal milestone for me, my one-year anniversary as the National Director of Youth Outreach & Education. What an incredible year it has been for the newly established Outre

Robert Melgaard
Outreach Outlook
Read More
GEN NXT: Logan Sullivan
December 2025

This month, the MCAA got to talk to Pennsylvania native Logan Sullivan. A young mason starting out in the industry whose enthusiasm for the craft of bricklaying is evident. His passion and genuine love for the craft could be felt throughout the interview,

Justin Stengel
GEN NXT
Read More
The 2026 Masonry Innovations
December 2025

Be the first to know what's to come in the new year! The masonry industry is always advancing, from new material color-ways to brand new technology, see what our MAP Members are bringing to the table in 2026!

Justin Stengel
Industry News
Read More