Latrobe and his engineering assistant Fredrick Graff crafted a model of the building to test different ideas. Latrobe was hired to design this building due to a heightened need for clean water sources because of the yellow fever outbreaks of 1793. The building never was very efficient, it needed a lot of maintenance and was ultimately discontinued. The design shows the Greek-Roman designs that Latrobe generally sticks to. Graff was put in charge of developing a more practical design after it was clear that Latrobe’s original didn’t work out.