H. A. Van Norman was in charge of the construction work done with dredges and the building of the unlined canal on the Owens Valley division. O.W. Peterson was in charge of the construction of the open lined canal from the north end of the Alabama Hills to the Haiwee reservoir. Phil Wintz had charge of the building of the South Haiwee Dam. C. H. Richards was in charge of the construction of the covered conduits and tunnels in the Rose Valley and Little Lake divisions. F. J. Mills was Division Engineer of the Grapevine division, consisting of tunnels and pressure pipes. Louis Mesmer built the Freeman Division. A. C. Hansen completely constructed the Jawbone division and a large portion of the Mojave division. John Gray had charge of the greater portion of the construction of the Elizabeth Tunnel and the power tunnels in the San Francisquito Canyon. W. C. Aston was in charge of the south portal of the Elizabeth tunnels and steel pipe. E. F.Scattergood was Electrical Engineer in charge of construction of the power plants. Roderick MacKay had general supervision of the operation of the cement mill and of the selection and advisory of the heavy mechanical equipment. E. W. Bannister was Office Engineer in general charge of the drafting room and of the office of records.