Boulderscape Project

Alcatraz

Pier 33, The Embarcadero, San Francisco, CA 94133
Service Provided

Phase II Stabilize Cliff Below Warden’s House Alcatraz. Installation of an 8” structural shotcrete and a 1”- 4” thick Pacific Granite sculpted finish.

8

Record Installation Time

56

Avg. Savings Over Alternative Wall Finishes %

10515

Wall Square Footage
In Depth Analysis

Boulderscape Services

The California State Parks was concerned with the chances of a slope failure happening below the old Warden’s House on Alcatraz Island. A soil nail wall shoring design was created to hold the slope in place. Since Alcatraz Island is the most visited state park in California, it was very important that the finish on the soil nail wall blended in with the existing rock in the area and didn’t draw attention. Boulderscape was chosen as the contractor to create a finish that would blended in with the environment. Boulderscape mock-ups were produced with a Pacific Granite finish and shipped to the island. The mock-ups were approved by State Parks and the shotcrete process began. We placed over 380 - 2,800 pound totes of 5,000 psi specialty shotcrete to create the structural and architectural finish.

Boulderscape Service Overview

Services Provided

Installation of an 8” structural shotcrete and a 1”- 4” thick Pacific Granite sculpted finish.

Boulderscape Finish

Pacific Granite

Color Scheme

Medium Earth Blend

Shotcrete Thickness

13"

Average Relief

3"

Shoring System

Rock Bolt

Shotcrete/Concrete Mix Design

5,500 PSI

Weather

Silica Fume was added to make the concrete more durable resist strong storm surges.

CLIENT EXPERIENCE

Featured Projects
Boulderscape

Present & Past Projects

View Our Portfolio
Interested

In Creating Something Beautiful?