Page:United States Statutes at Large Volume 71.djvu/240

 204

PUBLIC LAW 85-61-JUNE 27, 1957

[71 S T A T.

expenses of surveys, design, construction, and inspection pending reimbursement to the District of Columbia by the Bureau of Public Roads, Department of Commerce, or other parties participating in such projects, reimbursement to be credited to the appropriation from which payment was made: Provided further, That the Commissioners are authorized to fix or alter the respective widths of sidewalks and roadways (including tree spaces and parking) of all highways that may be improved under appropriations contained in this Act: Provided further, That no appropriation in this Act shall be available for repairing, resurfacing, or paving any street, avenue, or roadway by private contract unless the specifications for such work shall be so prepared as to permit of fair and open competition in paving materials as well as in price: Provided further, That in addition to the provision of existing law requiring contractors to keep new pavements in repair for a period of one year from the date of the completion of the work, the Commissioners shall further require that where repairs are necessary during the four years following the said one-year period, due to inferior work or defective materials, such repairs shall be made at the expense of the contractor, and the bond furnished by the contractor shall be liable for such expense: Provided further, That this appropriation and the appropriation "Operating expenses, Department of Highways" shall be available for advance payments to Federal agencies for work to be performed, when ordered by the Commissioners, subject to subsequent adjustment. DEPARTMENT OF SANITARY ENGINEERING

Capital outlay. Department of Sanitary Engineering: For acquisition of land for incinerator numbered 4; construction of sewers and extension of the District of Columbia water-distribution system; assessment and permit work; construction of seawall at sewer yard; purchase or condemnation of lands and rights-of-way for construction, maintenance, and repair of sewers, water mains, and Sewage Treatment P l a n t; continuing construction on aeration plant and secondary sedimentation tanks, reconstruction, enlargement, rehabilitation, major repair and replacement of grit removal, sludge digestion, heating and other existing equipment and facilities; rehabilitation and replacement of screening and flow control facilities at the main sewerage pumping station; construction of screening stations in the Oxon Run trunk and Portland Street sewers; laying water mains and sewers in advance of paving and installing fire and public hydrants; constructing trunk water mains; to remain available until expended, $9,400,000, of which $1,500,000 shall not become available for expenditure until July 1, 1958, and $3,400,000 shall be payable from the water fund, and $2,000,000 shall be payable from the sanitary sewage works fund: Provided, That this appropriation and the appropriation "Operating expenses. Department of Sanitary Engineering" shall be available for the employment of engineering or other professional services by contract or otherwise, and for engineering and incidental expenses. The Secretary of the Treasury is authorized to sell United States securities now held for and on account of the water fund of the District of Columbia in such amounts as may be certified by the Commissioners as necessary and credit the proceeds of such sale to said water fund. WASHINGTON AQUEDUCT

Capital outlay, Washington Aqueduct (payable from water fund): For miscellaneous betterments, replacements, and engineering plan-

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