54 STAT.] 76TH CONG., 3D SESS.-CH. 395-JUNE 18, 1940 with the unexpended balance of the appropriation for these purposes for the fiscal year 1940: Provided, That the expenditures from this appropriation for any reclamation project shall be considered as supplementary to the appropriation for that project and shall be accounted for and returned to the reclamation fund as other expendi- tures under the Reclamation Act: Providedfurther, That the expend- iture of any sums from this appropriation for investigations of any nature requested by States, municipalities, or other interests shall be upon the basis of the State, municipality, or other interest advancing at least 50 per centum of the estimated cost of such investigation; Operation and maintenance administration: For necessary pay of employees, traveling and other expenses incident to the general administration of reclamation projects, either operated and main- tained by the Bureau or transferred to water users' organizations for operation and maintenance, and incident to the sale of temporarily and permanently unproductive public lands as authorized by the Act of May 16, 1930 (46 Stat. 367), including giving information and advice to settlers on reclamation projects in the selection of lands, equipment, and livestock, the preparation of land for irrigation, the selection of crops, methods of irrigation and agricultural practice, and general farm management, the cost of which shall be charged to the general reclamation fund and shall not be charged as a part of the construction or operation and maintenance cost payable by the water users under the projects, $35,000; Limitation of expenditures: Under the provisions of this Act no greater sum shall be expended, nor shall the United States be obli- gated to expend during the fiscal year 1941, on any reclamation project appropriated for herein, an amount in excess of the sum herein appropriated therefor, nor shall the whole expenditures or obligations incurred for all of such projects for the fiscal year 1941 exceed the whole amount in the reclamation fund for the fiscal year; Interchange of appropriations: Ten per centum of the foregoing amounts shall be available interchangeably for expenditures on the reclamation projects named; but not more than 10 per centum shall be added to the amount appropriated 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; Construction: For commencement and continuation of construction, and for general investigations and administrative expenses, of the following projects in not to exceed the following amounts, respec- tively, to be expended from the Reclamation Fund in the same manner and for the same objects of expenditure as specified for projects hereinbefore in this Act under the caption "Bureau of Reclamation", under the heading "Administrative provisions and limitations", but without regard to the amounts of the limitations therein set forth, all to be reimbursable under the reclamation law, and to remain avail- able until expended: Colorado-Big Thompson project, Colorado, $2,000,000; Uncompahgre project, Colorado, $100,000; Boise project, Idaho, Payette division, $900,000; the sum heretofore appropriated for construction of the Twin Springs Dam and Snake River pumping plant shall remain available for construction of either or both of the same or such other project works on the Boise River or its tributaries as may be found by the Secretary of the Interior, following current investigations, to be more feasible; Sun River project, Montana, $50,000; 435 63 Stat. 715. Provisos. Expenditures con- sidered supplemen- tary; accounting. Investigations; divi- sion of expenses. Operation and maintenance adminis- tration. 43U.8.C.I§424- 424e. Information to set- tlers. Limitation of ex- penditures. Interchange of ap- propriations Emergency flood re- pairs. Constnrctlon of des- ignated projects. Ante, p. 433 . Oolorado-Big Thompson, Colo. Uncompahgre,Colo. Boise, Idaho, Pay- ette division. Sun River, Mont.