The Pueblo Alto and Mile-Hi neighborhoods in Albuquerque, New Mexico, face recurring flooding that has persisted for decades. Constructed in the 1950s and 1960s, these neighborhoods have experienced flooding due to undersized storm drain infrastructure and high volumes of runoff from upstream areas. The City of Albuquerque (CABQ) has invested in construction of various traditional drainage improvement projects, but flooding continues. Beginning with a study phase in 2021, CABQ is developing a combined green/gray stormwater infrastructure project, the Pueblo Alto/Mile Hi Green Stormwater Infrastructure (GSI) Pilot Project, to mitigate flooding issues. The project includes modeling of existing and post-project conditions, using a sophisticated two-dimensional (2D) combined hydrologic and hydraulic analysis, including rain-on-grid methodology, to represent surface runoff and storm drain flows. This will be the first large-scale GSI project implemented by CABQ. Currently in the design phase, the education, outreach, and coordination activities by the project team continue.