The San Diego Water Board issued a Clean Water Act section 401 water quality certification (Order No. R9-2023-0219) to the Project Applicant to develop a “village-core” mixed-use development on a 575.3-acre site that consists of 943 single-family dwelling units, 2,117 multi-family dwelling units, and 440 mixed-use residential units on 9.5 acres that also includes 20,000 square feet of commercial/retail uses, a 2.6-acre common purpose facility site, a 10.8-acre elementary school site, a 7.3-acre neighborhood park, and roads and infrastructure for the community. Additionally, the Project includes 253.6 acres of preserved open space, 31.1 acres of manufactured slopes and basins, a 51.5-acre community park site, and 22.6-acre active recreation area located south of the village, within the Otay River Valley. The project will also involve installation of a storm drain outfall that will discharge to the Otay River and a utility access road and pedestrian trail connection to the Otay Valley Regional Park trail system through an off-site facilities corridor south of the Project site. Unavoidable permanent loss of stream channel and wetland waters of the State of California will be mitigated at a permittee-responsible mitigation site downstream of and contiguous with other existing compensatory mitigation sites within the Otay River.