Arizona republican., 1915-12-07

crete. 1 wish to advise that We have been laying this type of pavement since 1909 and have been getting ex- ceilent results.
 Asphaltic concrete makes a good, economical, pavement.
 We have been paying from S1.S0 to S1.40 per square yard for a four inch concrete base and a TWO incn asphaltic wearing surface. and $I.40 to $50 per square yard for a five inch concrete base with a two inch wearing surface.
 Our oldest pavement of this tyre has shown no signs of disintegratiCn and TO repairs have been necessary.
 | think that this type of bitdmi nous pavement is the best type that is being iaid today and it is quite popular with OUT peoplehere
 will send you a copy of our specifications The 1915 supply IS exhausted but will send you a 1914 copy in which the formula is the same.
 Very truly yours,
 (Signed)
 A R. YOUNG.
 City Engineer.
 The specifications under which this pavement is laid showing eX- ceeding care to guard the interest of the tax payer and to obtain a long life pavement
 A number of Iowa cities have, dur ing recent years, laid considerable asphaltic concrete under varying specifications. the price per square ward running from s1.59 to S1.95. A number of California cities, including Pasadena. Fullerton and Fresno are also using some form of asphaltic concrete pavement with decided sue cess The following letter from the city engineer of Fresno contains some interesting information on this subject:
 "Gentlemen:
 In reply to your inquiry concern ing asphaltic concrete pavement will say that we have had three such jobs in Fresno of excellent quality, all laid under the Warren patents Two residence streets were paved with five inches of asphaltic concrete, laid in two compressions or courses, the lower three inches thick and upper two inches thick, at cost of $l27 per square yard. One business street was paved seven inches thick in two lavers: the lower one five inches thick and top two inches thick, at a cost of $1.6O per square yard. All of these jobs were done three years ago and are in excellent condition today. Fresno City paid d royalty of 25 cents per square yard directly to the Warren Co. 1 believe. and while the present administration or the city is satisfied with the merits of the pavement, no more has been laid on account of prejudice against the use of patented materials on pub lie work
 The cities of Fort Worth, Houston and san Antonio. Texas are also us- ing considerable asphaltic concrete pavement san Antonio having laid about 164,0O0 square yards of this ravement Roswell, \. NJ. has also used this pavement; the mayor Of Roswell in a letter under date ot Get. 27th stated as follows regarding this pavement:
 The work that has been done for Roswell has been very satisfactory so far by both companies. The price has varied from S1.61 to S2.05 per square yard. The concrete base was 3 incIes on some and inches on others. They recommend a 4 ar 4ia inch base where they have good solid sub-soil and of course that would make it some cheaper.
 If there is any further information that I can give you at any time, | will be glad to do so.
 Yours very truly.
 (Signed)
 J. $. LEA
 Considerable asphaltic concrete is laid without cement concrete base and of this tyne of pavement We have several examples locally. The pave ment which has recently been lad just south of the Center School prop erty is an example of this type. IL has an asphaltic concrete base 37s inches thick on which is laid 1iH inches of bitufninous wearing sur face The total cost of this pave ment in place is s1.50 but if laid in large quantities this price could prob ably be materially reduced.
 This is practically identical with the pavement on First Avenue which cost S1.51 a square yard. Another locally used pavement which might he classed as asphaltic concrete is the Warrenite pavement composed of bituminous concrete inches in thickness laid on an earth base on McDowell Road from Third street to Twelfth street the total cost 5f which was S1.21 per square yard. Another example of this type of pavement is on North Central avenue from the Little Maricopa Canal to where the oil macadam pavement commences just south of Orange wood. This stretch of nearly three miles is wearing well under fairly heavy use. and cost S1.19 per square yard.
 In a recent letter MT. w. G. Gear hart state engineer of the Kansas State Agricultural College. in re- sopnse to an inquiTy writes us as follows regarding Topeka pavement: The Topeka pavement you speak of is what we call the asphaltie concrete. It generally consists of a , inch concrete base and a to inch asphaltic concrete wearing sur face. As a matter of fact this wear ing surface is the same as the War ren Brothers so-called patented War renite or bitulithic pavement and it 1 became known as Topeka paving beI cause the Warren Brothers brought suit q number of years ago against | the city of Topeka. and .hc city was able to prove the exact proportion of l different sizes of materials used ia | their pavement, and after the testi- i mony for both sides was all in and ! the arguments had been made the ! Warren Brothers came into court and admitted their patent had not beer 1 infringeG in order that theN would