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Gibson Island Water System Improvement Project: Public Meeting June 5, 2012

Learn about the urgent need to replace the deteriorated 40-year-old water storage tank on Gibson Island. Find out about the proposed new tank, its environmental impact, and construction plans.

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Gibson Island Water System Improvement Project: Public Meeting June 5, 2012

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  1. GIBSON ISLAND WATER SYSTEM CAPITAL IMPROVEMENT PROJECT Public Information Meeting June 5, 2012

  2. THE PROBLEM… The Gibson Island Water Storage Tank is Nearing the End of Its Design Life • The existing tank is over 40 years old and needs repair • Deteriorated coatings and corroded exposed steel • Deteriorated concrete foundation • Structural defects

  3. FINDING THE BEST SOLUTION… The County Compared Rehabilitation Versus Replacement • The results of a December 2009 engineering study recommended the total replacement of the existing tank. • The study concluded that rehabilitation of the existing tank is impractical given its condition and age.

  4. FINDING THE BEST SOLUTION… The County Investigated Alternative Tank Sites and Configurations • An engineering study was performed to evaluate possible new tank sites and select the most optimal location and configuration.

  5. FINDING THE BEST SOLUTION… The County Investigated Alternative Tank Sites and Configurations • The new tank should be a ground storage tank (non- elevated) to maintain current invisibility to public view. • Only three locations exist on the Island having ground elevations high enough to hydraulically support a new ground level tank

  6. FINDING THE BEST SOLUTION… The County Investigated Alternative Tank Sites and Configurations • Location 3 determined to be least favorable option: • Within Critical Area • Close proximity to surrounding homes • Location 2 feasible but less favorable option: • Within Critical Area • Lower ground elevations require taller tank • Requires construction of access road and additional system piping

  7. FINDING THE BEST SOLUTION… The County Investigated Alternative Tank Sites and Configurations • The results of an August 2011 engineering study concluded: • Location 1 (Adjacent to the existing tank) is the most optimal site • Capacity: 220,000 gallons • Height: 30 feet • Diameter: 36 feet • Material: Coated Steel or Concrete

  8. THE PROPOSED NEW TANK… Existing Tank • Capacity: 173,000 gallons • Height: 25 feet • Diameter: 35 feet • Material: Painted Steel New Tank • Capacity: 220,000 gallons • Height: 30 feet • Diameter: 36 feet • Material: Coated Steel or Concrete

  9. NO IMPACT TO THE ENVIRONMENT… • Once the new tank is completed, the existing tank will be demolished and the area will undergo restorative landscaping • No disturbance within Critical Area • No net loss of vegetative cover

  10. WHAT YOU CAN EXPECT DURING CONSTRUCTION • No noticeable changes to water pressure or water quality • The new tank will remain hidden from view from the road and surrounding residences • Traffic and noise will be minimal during construction

  11. Questions? For general inquiries & further information: Mr. Kyle Massey 410-224-1271 Presentation will be made available online at: www.aacounty.org/dpw

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