The City of Olathe manages the yard waste for approximately 143,000 residents. Composting this waste for effective management has been a growing challenge as the city grows and tries to maximize existing composting space. To maximize land already owned, the City constructed a composting facility on top of a capped landfill cell in 2018. However, it quickly experienced a range of challenges due to ineffective contact water management. After assessing various repair options, the City decided to relocate the facility to alleviate site constraints and better meet regulatory compliance. Designed in 2021, the new compost pad will meet a robust range of regulatory requirements focusing on improving contact water ruff quality and eliminating erosion. The new site boasts a stormwater treatment train, including compost screens, detention, bioswales, level spreaders, and the utilization of a stream buffer. As a result, the peak ruff is reduced to pre-development levels, and contact water ruff quality will meet stringent MS4 water quality constraints. The new compost facility can manage a volume of approximately 460,000 cubic feet of yard waste. The City and design engineers worked closely with maintenance and operations staff, as well as three bureaus of the Kansas Department of Health and Environment, to ensure that the final design met the needs of all stakeholders. After this session, participants will be able to:
• Discuss and define compost facility design parameters and concerns.
• Define parameters to consider for site selection.
• Navigate regulatory requirements.

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