170. Edgar Jadwin, "Preliminary Examination of the Colorado River, Arizona and California, from Yuma to the Mexican Boundary Line," 58th Cong., 2d sess., H. R. Misc. Doc. 204 (1903), p. 4.
171. The Silas J. Lewis was later converted into a suction-dredge by the California Development Company. See Sykes, op. cit., p. 33.
172. Jadwin, op. cit., p. 2.
APPENDIX A
Steam Vessels Employed in the River Service 18^2-1^0^
Uncle Seem: side-wheel steamer; overall length 6$ ft.; beam 15 ft.; estimated tonnage 40; constructed, San Francisco; began operation on Colorado River December 1852.
General Jesup: side-wheel steamer; overall length 104 ft.; beam 17 ft.; estimated tonnage 49-63/95; constructed, San Francisco; began operation on Colorado River February 1854.
Colorado: stem-wheel steamer; overall length 120 ft.; estimated tonnage 60 to 80; constructed, Estuary; began operation on Colorado River December 1855.
Explorer: stem-wheel steamer (iron); overall length 54 ft.; constructed, Philadelphia; began operation on Colorado River December 1857.
Cocopah No. i: stern-wheel steamer; overall length 140 ft.; beam 29 ft.; estimated tonnage 100; constructed. Gridiron on Estuary; began operation on Colorado River September 1859.
Mohave: stern-wheel steamer; registered length 133 ft.; beam 28 ft.; estimated tonnage 192.61; constructed, Yuma; began operation on Colorado River 1863.
Esmeralda: stern-wheel steamer; registered length 93 ft.; overall length 97 to 130 ft.; beam 20 ft.; estimated tonnage 46-85/95; constructed, San Francisco; began operation on Colorado River March 1864.
Nina Tilden: stern-wheel steamer; registered length 98 ft.; beam 22 ft.; estimated tonnage 107.40; constructed, San Francisco; began operation on Colorado River July 1864.
Colorado No. 2: stern-wheel steamer; registered length 127 ft.; overall length 145 ft.; beam 26 ft.; estimated tonnage 178.59; constructed, Yuma; began operation on Colorado River 1865.
Cocopah No. 2: stern-wheel steamer; registered length 147.5 ^^'\ beam 28 ft.; estimated tonnage 231.37; constructed, Yuma; began operation on Colorado River March 1867.
Gila: stern-wheel steamer; registered length 149.47 f^-; overall length 175 ft.; beam 31 ft.; estimated tonnage 236; constructed. Port Isabel; began operation on Colorado River February 1873.
Mohave No. 2: stem-wheel steamer; registered length 149.5 ^^-i overall length 175 ft.; beam 31.6 ft.; estimated tonnage 188.03; constructed. Port Isabel; began operation on Colorado River October 1875.
Southivester: Sloop; overall length s6 ft.; beam 15 ft.
Cochan: stern-wheel steamer; registered length 135 ft.; overall length 159 ft.; estimated tonnage 234; constructed, Yuma; began operation on Colorado River 1899.
St. Vallier: stern -wheel steamer; registered length 74.3 ft.; beam 17.1 ft.; estimated tonnage 92; constructed. Needles; began operation on Colorado River 1899.
Searchlight: stern -wheel steamer; overall length 91 ft.; beam 18 ft.
Electra: steamer.
Retta: side-wheel steamer.
Katie Lloyd: steamer.
