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Public works identifies drainage gap after homeowner flooding on Palm Avenue; city to design targeted fix
Summary
After heavy rainfall following a neighborhood road‑raising project, public‑works staff identified a missing yard drain at the northwest corner of 269 Palm Avenue that allowed stormwater to pond and flood interior sunken living space. Staff will design a new connection and is coordinating grants and property owner adaptation options.
Public Works presented findings on Sept. 28 after an owner of 269 Palm Avenue reported interior flooding during a heavy rain event that followed completion of the Palm and Hibiscus Neighborhood Improvement Project.
What happened: The neighborhood project raised adjacent roadways and added two pump stations, backflow prevention and a new storm‑water collection system. After a July/June storm that the city characterized as an extreme event, the property owner reported water entering a sunken living room. Public Works said it inspected the site and found a low spot at the northwest corner of the parcel where a yard drain was not installed.
Staff findings and recommendations: City engineers identified three contributing items: (1) the finished‑floor (habitable space) elevations on the property included a sunken living area not reflected in the exterior grade drawings; (2) the project elevated roads and added collection inlets that changed sheet‑flow patterns; and (3) a missing yard drain at a low‑spot allowed ponding against the house. Public Works said it will design and permit a new connection to collect that low‑spot flow and will coordinate with the property owner, who intends to pursue a private‑property adaptation grant to elevate the sunken living room and other measures.
Lessons learned: Staff said future neighborhood improvement projects will include improved surveys of finished‑floor elevations and more careful checks to ensure private‑property low spots are captured. Public Works also noted the large storm produced rainfall greater than the design storm for typical street systems and that the project nevertheless prevented widespread roadway flooding in most locations.
Next steps: Public Works will design the local drainage connection, permit and construct the repair at the northwest corner, and continue to use these lessons in upcoming neighborhood improvement projects.
Speakers quoted or referenced: Joe Gomez (Public Works Director), Christina Ortega (City Engineer), property owner Andres Accion (reporter of flooding).
