The Coconino sun., 1916-04-28

ing on any streets within the corpo- rate limits of the town who shall hereafter lay sidewalks, shall con- form to the sidewalk grade line established by the Town Engineer, for the streets to which the property is adjacent; said established grade and profile thereof being ratified by the Common Council, and on file in the office of the Town Engineer.
 SECTION II
 All cement sidewalks hereafter constructed shall be built under the supervision and control of the Super intendent of Streets of the said town of Flagstaff, or his duly authorized representative, and according to the following specifications and require ments:
 A. Walks built in the business district shall be built to the curb line and extended continuously from the street line.
 b. The outer edge of the cement walks in the residence district shall be five (5) feet from the street line and parallel to said street line, unless otherwise directed by the Superin- tendent of Streets; the walk to ex- tend continuously from the street line to the outer edge and to be not more nor less than five (5) feet in width. c. The outer edge of the curb shall be placed ten (10) feet from the street line in both residence and business districts.
 d. The curbs at alleys and street corners shall turn in and extend to the walks, and walks at such corners shall extend to the curb to meet the street or alley crossings unless other wise directed.
 e. Stakes shall be set by the town engineer to define the edge of the walk with grade mark thereon to in- dicate the top of the finished walk, which shall be furnished without cost by the town. All walks to have a slope toward the curb of one-quarter (k) inch to the foot.
 f. All walks at alley crossings shall be constructed so as to give free ingress and egress to the alley and flush with the top of the adjoin- ing walks.
 g. Openings for drainage shall be left under all alley crossings where necessary; the sizes of such openings to be decided by the town engineer.
 SECTION III
 Foundations
 All materials excavated in con structing the foundations shall be classified as earth, loose rock and solid rock, and the prices bid for these classes of excavation, and for the embankment necessary to bring the sidewalk foundation to the proper sub-grade, shall apply to all work necessary for the proper grading of the foundations.
 Where considered necessary by the town engineer, some porous material, such as gravel or cinders, shall be used to bring the foundation up to the proper sub-grade, and proper drainage provided for the same.
 All foundations shall be cleaned of all trash and vegetable matter, and thoroughly rolled or tamped and dampened before placing any con crete upon the same.
 Retaining Walls
 Wherever considered necessary by the town engineer a stone or concrete retaining wall shall be built to retain the sidewalk foundation.
 SECTION "
 Cement
 The cement used shall be Portland | cement and must conform to the re- quirements and be subject to the tests as set forth in Specifications No. IA of the town of Flagstaff.
 Fine Aggregate
 Fine aggregate shall consist of sand or screenings from hard, durable | crushed rock or gravel consisting of quartzite grains or other equally hard material, graded from fine tc coarse, with the coarse particles pro dominating and passing, when dry, a screen having one-quarter (h) inch openings. It shall be clean, free from dust, vegetable or other deleterious matter, and all fine aggregate con taining more than five (5) per cent clay or less shall be washed before using.
 Coarse Aggregate
 Coarse aggregate shall consists of clean, hard, durable crushed rock or gravel, graded to size, free from dust, loam, vegetable or other dele terious matter, and of such sizes to