Green Infrastructure
Definition
Nature-based systems that manage stormwater, reduce urban heat, improve air quality, and provide community benefits using vegetation, soil, and natural processes. Examples include rain gardens, bioswales, green roofs, urban forests, permeable pavement, and constructed wetlands. Green infrastructure costs 20-30% less than traditional gray infrastructure (pipes and tunnels) while delivering multiple community benefits.
Louisville Context
MSD has installed over 250 green stormwater projects since 2009, including rain gardens in Shawnee Park and bioswales in the Portland neighborhood. However, green infrastructure represents less than 5% of Louisville’s total CSO investment, with most funding going to underground tunnels. Louisville has significant opportunity to expand green infrastructure in partnership with Parks Department and community organizations.
Why It Matters
Green infrastructure provides better value than pipes and tunnels by managing stormwater while also reducing flooding, cooling neighborhoods, creating habitat, and improving property values. Communities with green infrastructure see lower sewer rates and higher quality of life than those relying solely on underground systems.
Dave’s Proposal
Dave will shift Louisville’s infrastructure priorities toward green solutions that deliver multiple benefits. His budget-neutral approach reallocates $15 million annually from planned gray infrastructure to green infrastructure, creating jobs while cooling neighborhoods and managing stormwater more cost-effectively.