what lies beneath

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1890's map of San Francisco.  Original creeks represented by blue, marshes by green, and the masses of pink running along the coast of the right half of the city illustrate modern day land fill. Because of rapid development, urbanization, and an accelerated growth of population, many of the natural watersheds have been covered and built over - severely altering San Francisco's ecosystems.  Islais creek was once the largest body of water, covering approximately 3.5 miles from Glen Park to the bay, reaching from Point Portrero to Hunter's Point.