The Coconino sun., 1916-04-21

gravel, graded to size, free from dust, loam, vegetable or other dele terious matter, and of such sizes to pass two and one-half (21s) inch round opening and be retained on a screen having one-quarter (A) inch openings.
 Natural Mixed Aggregate
 Natural mixed aggregate shall not be used as it comes from deposits, but shall be screened and used as specified
 Water
 Water shall be clean, free from acid, oil, alkali or vegetable matter,
 Forms
 Forms shall be we'll built, cubstan- tial, unyielding and properly braced, and shall conform to the lines given by the town engineer.
 Lumber once used in forms, shall be cleaned before being used again.
 Construction
 The concrete walks shall be two coat work placed as follows: On the foundation, finished as above speci- fled, and four (4) inches below and parallel to the finished surface of the proposed walk, shall be placed a con cret ebase three (3) inches thick, con sisting of the following materials: Portland cement-one part by vol ume.
 Fine aggregate-three parts by volume.
 Coarse aggregate-four parts by volume.
 A sack of cement weighing ninety four (94) pounds net shall be con sidered as having a volume of one CD cubic foot.
 The densest possible mixture of the aggregate making up the concrete is desirable, and the proportions of the aggregate may be varied by order of the Superintendent of Streets when he deems it necessary, but in no case shall the total aggregate be more than seven CD parts to one CD part cement by volume.
 After the base has been placed and worked to an even grade, and before it has taken it's initial set, there shall be laid the finish coat consisting of a layer of one inch thick, mixed in the proportions of one part cement to two (2) parts sand or screenings, and properly finished. All mixing, either by hand or machine, shall be done in thorough and workmanlike manner in accordance with the standard ap, proved methods, and to the approval of the Superintendent of Streets.
 All walks shall have rounded edges and be marked off in blocks of not more than twenty-five square feet with a marking tool cutting com. pletely through the finish coat, ant expansion joints of not less than one. quarter (h) nor more than one-halt (h) inch wide, extending through the entire thickness of the concrete to be placed as directed by the Super intendent of Streets.
 All street crossings, curbs anc gutters shall be constructed in ac cordance with Specifications No 15 of the town of Flagstaff, and thu plans of the same on file in the offic, of the town engineer.
 All walks built by contract shal have the name of the contractor anC the year in which the walk was bull stamped into the concrete surface.
 Protection
 As soon as sufficiently set, the fin ished walk shall be covered witt earth, sand or some other suitable material and kept wet for a period of three days, after which it shall bt cleaned and all rubbish and surplus material removed, and where tho sidewalk is built on fill having nc retaining walls, embankments ot earth or gravel shall be built up leve with the top of the walk and extend ing out at least one CD foot from the edge of the walk
 SECTION V
 The business district mentioned 1T this ordinance shall consist of the fol lowing blocks:
 Blocks Nos. 4, 5, 6, 1T, IS and 32 except the south and east sides ot block four (4), and the north and eas' sides of block thirty-two (32).
 SECTION VI
 Any person violating any of thu provisions of this ordinance shall b. punished by a fine of not less thar five (5) dollars nor more than fit! | (5O) dollars, or by Imprisonment il
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