The current building sits on what used to be a large slough. The area was filled in and the water diverted through a large culvert behind the library. With the rising and lowering of the tide, heavy rains, and long dry periods, the fill beneath the library continues to shift. Various parts of the building are rising and falling at different rates. The pilings under the building have failed due to the soil shifting and because they no longer have the same tension as when they were driven into the ground over fifty years ago. Through a 2014 engineering study, it was determined that all of the pilings under the building have failed.
Although the building is currently safe to occupy, there is a concern the constant shifting of the foundation could cause structural damage requiring the closure of the building. There are cracks in ceiling beams and support posts.