Economical, Effective Concrete Rehab Solution For Escondido

July 2014, Vol. 69 No. 7

Less than an hour north of San Diego, CA, lies Escondido, a quaint city surrounded by rocky hills and beautiful skylines.

Escondido was founded in 1888 and currently has a population of 144,000. The Escondido-Vista Water Treatment Plant supplies water to more than 25,000 residential, commercial and agricultural customers. As the city has continued steady growth, the water treatment plant’s aging infrastructure has continued to deteriorate, therefore a solution was sought.

The plant, constructed in 1976, currently treats 75 million gallons per day (mgd) but has the capacity to treat up to 90 mgd. The local water originates from the watershed and well fields located near Lake Henshaw. It is then transferred to Lake Wohlford via an open canal. Additional water is purchased from the Colorado River and Northern California via the State Water Project. The water is stored in Dixon Lake and then enters the plant through a 54-inch diameter pipe. The treatment of the water includes coagulation, sedimentation, filtration and disinfection to ensure destruction of pathogenic organisms. After treatment, water is distributed from the Escondido-Vista Water Treatment Plant to the Vista Irrigation District, part of Rincon del Diablo MWD and throughout Escondido through a system of pipes and reservoirs.

Upon inspection of the facility, it was concluded that the plant’s 90,000 square feet of concrete showed signs of degradation with exposed aggregate. To decrease the probability of building a new facility, it was decided to rehabilitate the current facility to save taxpayers’ money.

The city of Escondido put out a call for bids and Murrieta, CA-based National Coating and Lining Company (NCLC), a Raven Certified Applicator, won the project for being low bidder. NCLC brings 40 years of combined expertise in the restoration and protection of concrete and ferrous metals throughout the water and waste water industry, making it an exceptional fit for the $1.2 million project in Escondido.

Neil Greenwood, city of Escondido utility construction manager, expressed that NCLC was the most experienced contractor of all those who submitted bids when it comes to concrete coatings and all the issues that were encountered with a project with this magnitude. Aquatapoxy’s successful proven history in potable water infrastructures gave Greenwood confidence to specify Raven A-6 in the bid specifications. Greenwood was familiar with NCLC’s ability, as one of the top applicators of Raven products, having had many successful projects with the city of Escondido.

Challenges and issues

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