UNDERGROUND/TUNNELING

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Water

McMillen Jacobs has been involved in the design and construction of water supply and hydroelectric
tunnels for some of the world’s major water providers. In just the last 15 years, we have designed over
120 water tunnels and pipelines. We are known for our expertise in pressure tunnel design, as well as
engineering of pipeline conduits in ground conditions ranging from soft ground to hard rock. As we look to
the future, we see water becoming a more limited and valuable resource. We will continue to provide
advanced solutions to water conveyance and storage projects.

McMillen Jacobs Associates has designed and provided construction management on a range of water
tunnels and pipelines from smaller conduits constructed via trenchless methods to large diameter tunnels
for major water conveyance pipelines with tunnel boring machines. We have designed and constructed
water projects in a variety of environments from constrained urban sites to densely forested areas rural
areas and underwater crossing in seismically active regions, our experience runs the gamut.

In addition to the design of tunnels and shafts our staff has experience with geotechnical investigations
and characterizations as well an understanding of hydraulic design criteria and the interface between
hydraulic and tunnel design.