Wood Rodgers prepared the Project Report and PS&E for the construction of a new partial-cloverleaf interchange to replace an existing signalized intersection on a four-lane expressway section of State Route 99/70 (SR-99/SR-70). The geometric design accommodates the conversion of SR 99 to a six-lane freeway and substantial widening of Elverta Road. Wood Rodgers strategically managed key issues associated with this project including traffic forecasting, relocation of major irrigation/drainage channels on both sides of the highway, right-of-way acquisition, relocation of electric transmission and distribution lines, relocation of major fiber optic telephone lines and mitigation of potential impacts to giant garter snake, a federally threatened species.