1146 Interchangeable ap- propriations . Emergency flood re- pairs . Use of motor vehicles for travel, etc . All owan ce. Yuma project, Ariz .- Ca lif . Colorado River front work adjacent to . Vol .44,p.1010. Boulder Canyon pr o- ject . Constru ction. Acquisitions . Vol. 45, p . 1057. U.S. C., Supp. IV, p. 587. Proviso. Investigation and re- ports . Vol. 45, p .1065. U.S.C ., Supp. IV, p.591. Geologica l Survey . Director, and office personnel . General expenses . Authorizations for all services , etc . Ante, p . 1117. Vehicles. SEVENTY-FIRST C ONGRESS . SEss . III . CH. 187. 1931 . Ten per centum of the foregoing amounts shall be available inter- changeably for expenditures on the reclamation projects named ; but not more than 10 per centum shall be added to the amount appro- priated for any one of said projects, except that should existing works or the water supply for lands under cultivation be endangered by floods or other unusual conditions an amount sufficient to make necessary emergency repairs shall become available for expenditure by further transfer of appropriation from any of said projects upon approval of the Secretary of the Interior ; Whenever, during the fiscal year ending June 30, 1932, the Com- missioner of the Bureau of Reclamation shall find that the expenses of travel, including the local transportation of employees to and from ther homes to the places where they are engaged on construc- tion or operation and maintenance work, can be reduced thereby, he may authorize the payment of not to exceed 3 cents per mile for a motor cycle or 7 cents per mile for an automobile used for necessary official business ; Total, f rom recl amation f und, $6, 971,000 . To defray the cost of operating and maintaining the Colorado River front work and levee system adjacent to the Yuma Federal irrigation project in Arizona and California, subject only to section 4 of the Act entitled "An Act authorizing the construction, repair, and preservation of certain public works on rivers and harbors, and for other purposes," approved January 21, 1927 (44 Stat ., p . 1010), $100,000, to be immediately available . Boulder Canyon project : For the continuation ofeconstruction of the Hoover Dam and incidental works in t he main stream of the Colorado River at Black Canyon, to create a storage reservoir, and of a complete plant and incidental structures suitable for the fullest economic development of electrical energy from the water discharged from such reservoir ; to acquire by proceedings in eminent domain, or otherwi se, all l ands, ri ghts of way and other pr operty ne cessary for such purposes ; and for incidental operations ; as authorized by the Boulder Canyon, Project Act, approved December 21, 1928 (U . S . C ., Supp. III, title 33, ch . 15A) ; $15,000,000 to be immedi- at ely avai lable and to rema in avail able unt il advan ced to th e Colo- rado River Dam fund, which amount shall be available for personal services in the District of Columbia and for all other objects of expenditure that are specified for projects included in this Act under the caption "Bureau of Reclamation" without regard to the limi- tations of amounts therein set forth : Provided, That of the amount hereby appropriated, not to exceed $50,000, reimbursable, shall be av ailable for inves tigation and rep orts as authoriz ed by sec tion 15 of the Boulder Canyon Project Act . GEOLOGICAL SURVEY SALARIES For the Director of the Geological Survey and other personal services in the District of Columbia, $150,000 ; GE NERAL EXP ENSES For every expenditure requisite for and incident to the authorized work of the Geological Survey, including personal services in the District of Columbia and in the field, including not to exceed $40,000 for the purchase and exchange, and not to exceed $60,000 for the hire, maintenance, repair, and operation of motor-propelled and horse-drawn passenger-carrying vehicles for field use only by geolo- gists, topographers, engineers, and land classifiers, and the Geologi-
�
