This project consists of installing two 100,000 gallons bolted or welded steel potable water tanks (the owner will choose either the bolted or welded tank by accepting the applicable line bid item in the bid schedule) with associated appurtenances, tank foundation, above-ground and below ground piping, valves, vaults, tank site grading, fencing, on-site sodium hypochlorite generation system and tank level controls. These tanks are to be constructed in the existing redwood stave tank's footprint, per agreement with the California State Park. The tanks will operate in series and parallel. Tank construction must be staged with redwood tank demolitions and pipe/valve installation to always maintain water service to the Town (except for brief interruptions during rerouting of connections.) The cure period for tank coating, inspection and testing will be required before the first tank can be put into operation service prior to the second tank demolition. An on-site sodium hypochlorite generation system and hydrogen safety management System will be constructed in the existing water treatment plant. Piping, valving and building modifications are required as shown on the plans.
Pre-bid Conference Johnsville is located at elevation 5200 feet. The Engineer anticipates that vehicle access to the tank site will not be possible at the time of bidding due to substantial snow accumulation. Snowshoe access will likely be the only way to physically observe the tanks. Photos of the tank farm have been prepared for those bidders that cannot/do not want to access the site and will be provided for download in the designated Dropbox. Individual arrangements will be made for prospective bidders for access to the Water Treatment Plant upon request.
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