Reclaimed Water Mains

Location: Tustin Ranch, Irvine, Calif.

Client: Irvine Ranch Water District

Burns & McDonnell designed two reclaimed water mains totaling over 4,000 linear feet (lf) for the Irvine Ranch Water District in the cities of Tustin and Irvine, Calif. Burns & McDonnell prepared a Preliminary Design Report (PDR) for the District’s review.  The PDR outlines the approach Burns & McDonnell employed for the design of these reclaimed mains.  Special design considerations for this project included traffic control, preliminary potholing, boring and jacking of steel casing designed for railway crossing in Walnut Avenue, reconnection of existing services, installation of laterals for new and proposed reclaimed services, provision of all necessary appurtenances, cathodic protection and permitting procurement.

 As both the affected roadways are heavily crosshatched with existing utilities, Burns & McDonnell staff had to perform an extensive research of utility record drawings and verify this information with applicable utility personnel to prepare base map drawing for the project’s design. Both roadways are subject to heavy traffic flow.  Thus, traffic control plans were required as part of the municipal encroachment permit process for any work (including preliminary potholing) to be done.  We contracted with traffic engineers at Berriman & Henigar for preparation of traffic control plans for both preliminary potholing and construction.