This fieldtrip brings ESA members to multiple urban sites where major green infrastructure projects have been implemented or are under construction. Since its founding 300 years ago, New Orleans has constantly negotiated its relationship to water through the use of pumps, canals, and levees – grey and blue infrastructure that work to move rain and floodwater out of the city’s unique topography. Since the catastrophic flooding during 2005’s Hurricane Katrina, city officials have slowly begun designing and implementing large-scale green infrastructure projects. These initiatives are intended to capture precipitation during intense rainfall, relieving pressure on the city’s aging and problem-prone municipal drainage system. Retaining water on the landscape may also decrease soil subsidence, a critical problem for a city already largely below sea level. Further, these interventions are slated for implementation on large tracts of vacant urban land, abandoned in Katrina’s aftermath. Ecological dynamics are at the center of the implementation and operation of these green infrastructure initiatives. Public health concerns over mosquitos, rodents, and invasive vegetation represent serious challenges in the design and maintenance of the projects. Led by local urban ecologists engaged in the design and monitoring of the projects, participants will also meet with city officials and project designers, toward an understanding of the promise and limits of green infrastructure in a city globally known for its water management dilemmas.