The Petaluma River is located on San Pablo Bay in Sonoma and Marin Counties, California. Operations and Maintenance (O&M) provides for dredging of a channel 200 feet wide to a depth of -8 feet Mean Lower Low Water (MLLW) across the flats in San Pablo Bay to the mouth of the river (Across-the-Flats Channel), 100 feet wide and -8 feet MLLW thereafter to Western Avenue in Petaluma (River Channel), and a turning basin 300 to 400 feet wide to -8 feet MLLW. The Non-Federal Sponsor (NFS) is responsible for providing a suitable upland placement site.