As used in this chapter, the following terms have the following meanings: (a) “City” means the City of Vallejo. (b) “Commission” means the San Francisco Bay Conservation and Development Commission. (c) “County” means the County of Solano. (d) “Department” means the Department of Transportation. (e) “Plan” means the White Slough Specific Area Plan adopted pursuant to this chapter. (f) “South White Slough” means all tidally influenced areas south of State Highway Route which would naturally drain northerly to the Napa River, any areas within the tidally influenced portions of the slough that have been filled pursuant to a commission permit, and any areas within the tidally influenced portions of the slough which have been filled after January 1, 1977, without a permit from the commission. (g) “White Slough” means, within the county and the city, the historic, unfilled bed of White Slough, all lands surrounding the historic bed of White Slough that have been touched by tidal waters since January 1, 1977, any areas within the tidal and tidally influenced portions of the slough that have been filled pursuant to a permit from the commission, and any areas within the tidal and tidally influenced portions of the slough which have been filled after January 1, 1977, without a permit from the commission. (h) “White Slough Project” means, within the county and the city, the restoration and enhancement of the habitat values of South White Slough, the widening of State Highway Route between Sacramento Street and State Highway Route to not more than four traffic lanes with medians and shoulders of the minimum width possible, the construction of new tidal channels and control structures underneath the existing and the widened portions of State Highway Route 37, the construction of new interchanges between State Highway Route and State Highway and Sacramento Street, the covering with fill of an existing sewerline on the south side of the highway widening, and the relocation of the existing sewerline north of State Highway Route within the area required for the widening of State Highway Route 37.