Tacoma Water needed to cover the last of its existing open air storage reservoirs. After an extensive study of various cover options, Tacoma Water decided to construct two 33 MG pre-stressed, strand-wrapped concrete reservoirs inside the footprint of the existing McMillin Reservoir No. 2.
Construction of the tanks will result in the world’s largest diameter, pre-stressed, post-tensioned tanks. The project includes 64 separate roof and floor slab pours, 664 columns, and more than 300 miles of strand wrapped around the tank.
Site work includes the demolition of portions of the existing 100 MG open top, concrete McMillin Reservoir No. 2, site grading to backfill the proposed reservoirs within 2 feet of roof levels, site drainage, and reconfiguration and extension of the steel inlet, outlet and drain piping, which measure 60, 48 and 36 inches in diameter, respectively.
Due to economies of scale in the design, RH2 completed engineering for less than 1.5 percent of the overall project cost. RH2 completed the design and permitting to within a day of the originally established project schedule. Funding for this project included bond sales, Public Works Trust Fund loans and American Recovery and Reinvestment Act monies.
The design of the two 33 MG concrete reservoirs was completed in the spring of 2009, and it is anticipated that the substantial completion date of the two reservoirs will be near the end of 2011.
Congratulations to our Newest PEs!
May 24, 2016
RH2 is proud to announce that Clayton Posey, Harley Sandoval, Laura Reiter, and Mike Reiter are now Licensed Professional Engineers in the State of Washington. Kris Lillie is now a Registered Professional Engineer in the State of Oregon.
New P.E.s: Devon Petit, Eric Smith, and Michael Voth!
December 17, 2014
RH2 is proud to announce that Devon Petit, Eric Smith, and Michael Voth are now Licensed Professional Engineers in the State of Washington!
Jon Conner now a licensed S.E. in Oregon
May 22, 2014
RH2 is proud to announce that Jon Conner has passed the Professional Structural Engineering exam for the state of Oregon!