Text Size:   A+ A- A   •   Text Only
Find     
Site Image
Region 1
Beverly Beach State Park
Wooden Water Tank Replacement and Water System Upgrade
 
 
 
Old water tank at Beverly Beach 
Old water tank at Beverly Beach.
 
New water tank 
Water tank replacement after exterior painting. 
Beverly Beach State Park uses up to 43,000 gallons of water daily during the busy season. The old water system could produce 47,520 gallons daily and store 155,000 gallons of water. If the plant went down, the park could only operate for three days before running out of water. 
 
Water System Upgrade
The first priority was to increase the water plant's capacity to produce water. Engineering and field staff contacted Pall Corp., the original manufacture/designer of the existing water plant, to see if they would provide consultation at no cost.  They agreed and then suggested the water plant upgrade proceed in three phases:
  • Increase the production of the water plant by modifying the existing components of the plant.
  • Upgrade the software and computer hardware.
  • Change the maintenance schedule to match the proposed upgrades. 
One of the options OPRD considered for the first phase was to double the number of filter modules on the plant, theoretically doubling water production. Pall felt doubling the filters would require more compressed air capacity to back-flush the filters and double the number of components. The believed this option would be very difficult or impossible. 
 
Pall suggested replacing the six filter modules with newer, improved modules that had more filter membrane surface area. The new modules were ordered and installed, and successfully doubled our capacity. The plant was tested up to 55 gpm and still showed signs that it could be pushed to produce even more if needed.
 
A new computer screen component (PMI), rough-use laptop and software were purchased for the second phase. The new computer system was programmed with the new maintenance intervals. Staff now control the plant remotely or onsite.
 
Wooden Water Tank Replacement
The second priority was to replace the 50,000 gallon redwood tank with a 100,000 gallon steel tank. After researching tank options, three common types were compared -- corrugated galvanized, bolted glass lined, and welded steel. We selected welded steel because the life expectancy of ¼-inch welded galvanized was 2-3 times longer than the others. When inspected and maintained routinely, the life span is indefinite.
 
T. Bailey of Anacortes, Wash., was awarded the contract to remove the redwood tank, excavate the site for the new tank, and form-up and pour the concrete slab foundation. The slab is 31 feet in diameter and 2 feet thick with rebar reinforcement. The slab required 60 cubic yards of 4,000 psi concrete. 
 
The tank exterior was painted with epoxy type coatings and the interior sanitized.  The tank should be ready by the end of June 2009.