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Greening American Trail

In the spirit of American Trail’s conservation messages, the exhibit and facilities were constructed using sustainable practices. The zoo strives to model conservation best practices in everyday Zoo operations—whether recycling technologies, using alternative energy, and employing environmentally sound materials and practices.

Green practices incorporated into American Trail include:

  • American Trail reused an existing site (formerly Beaver Valley) with lower-impact construction methods, including retaining walls that reduced the disturbance of soils, vegetation, and tree roots and minimize the impact on upslope trees. Next to the retaining walls are small rain-gardens that help manage storm water drainage
  • All of the water in the seal and sea lion exhibit is recycled originating from the District of Columbia’s water system. Tap water, however, does not meet the stringent standards for aquatic animal care. A new state-of-the-art filtration system scrubs the water and removes any chemical treatments. The pH balance is adjusted for the animals and filtered a final time using ozone filtration.
  • Aquatic life support systems and equipment have been replaced to provide better control of water chemistry and quality.
  • Thanks to careful design of the pools and expanded backwash systems, this exhibit uses less than half the amount of water similar pools (designed with standard techniques) would use.
  • An ozone disinfectant system will reduce our dependence on chlorine for disinfecting the pool water.
  • Low emitting materials, certified wood, materials with recycled content, and regional materials were used to align with Leadership in Energy and Environmental Design (LEED) standards.
  • Full cut-off light fixtures will limit light pollution.
  • Shading of the pools will keep the water form absorbing so much heat from the sun.
  • Heating, ventilation, and cooling of people and animal spaces is controlled individually in each space, to reduce energy use when those spaces are not being used.