Orange County Insight August 2021

Orange County Sanitary Landfill Begins Cells II Construction

By: Stephanie Straub, Assistant to the County Administrator and Public Information Officer

This summer, Orange County began work on the Cell II expansion project of the Orange County Sanitary Landfill. Cell II construction includes site grading, construction of a liner and leachate collection lines, gravel access roads, drainage features, and erosion and sediment control measures. Additionally, a disposal area with a concrete retaining wall will be adjacent to the new cell. Sargent Corporation won the bid for the project for $1,972,000 and has diligently executed task orders under the watchful eye of Draper Aden, the County ’ s contracted Landfill engineer, and Public Works Director, Aaron Caine. The expansion is slated to last approximately three months with an expected completion date of mid - August 2021.

Cell expansion projects are developed to allow for maximum use of space within strict environmental regulations. Based on Orange County ’ s volume of solid waste, cells are planned to be built at intervals to allow for thoughtful and continuous expansion of the landfill to avoid interruptions. Each cell is projected to last approximately 8 - 10 years but is entirely based off volume which can vary dramatically from year to year. Cells which are pyramid in shape, are built off of each other in a pattern to allow for access and the carefully monitored release of gas and leachate, until eventually one large mound will incorporate all cells into a large pyramid earthen structure. The Orange County Sanitary Landfill is projected to house eight (8) cells when completed.

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