The fly ash wastes produced by incineration in Yilan undergo a process of solidification and are placed carefully in the storage arenas behind nearby dunes. In recent years, the government decided to move the fly ash from open landfills to covered warehouses, reducing the possibilities of environmental contamination.
The project site and the incinerator are located within the Lize Industrial Area. This area was once covered by multiple layers of dunes. The proposed design turned the original planned landfill 90 degrees, making it parallel with the seaside dunes. Using a designed sequence of stacking, layer and layers of dunes will “grow” back to protect the Lanyang Plain from tsunami.
The Storage Warehouse was conceived as an abstract sand dune. The roof is supported by a combination of steel angles, instead of commonly used “H” beams, to form a long span mega space. The zigzag concrete walls on the north and south sides form resistant structures. During the removal of formwork, parts of the concrete will fall off. The texture and shades of raw concrete look like a cross section of a naturally collapsed sand dune. The warehouse provides temporary storage for the solidified ash, so the construction material used are minimal and recyclable. This allows the site to be use flexibly in the future.
Before the storage warehouse reach full capacity, the solidified ashes will be transported to the landfill west of the warehouse during the non-rainy season. In order to reduce the use of concrete in the newly designed landfill, impervious HDPE blankets are used to mold the solidified ash into pyramid-shaped units. Sewage pipelines are installed at the bottom of the landfill to intercept possible pollution seepage in order to avoid contaminating the land and groundwater with careful monitoring. This also allows for the removal of the solidified material for reuse in the future. The landfill storage sequence is designed to allow vegetation and human activities to enter. With changes every year, the terrain and the vegetation will grow with the coastal landscape. They are like the multiple layers of sand dunes recorded on ancient map creating fresh stories. By turning an environmental crisis into a design opportunity, the project becomes a large scale environmental classroom encouraging visitors to reflect on sustainability issues like waste treatment and recycling.