Arizona republican., 1920-01-04
LOOSE ROCK FOR
 ROAD BASE IF ETS
 NJ FEDERAL AID
Government To Spurn This Type Maddock Learns Warren Bros. Patent To Expire In May, 1920 Informs Commission As To Governments Stand

The government will withhold fed eral aid, it became known yesterday. if the Maricopa County Highway commission decides to build roads fol- lowing one of the types found among specifications promulgated by the commission for the use of bidders. The variety of the specifications was for the purpose of stimulating compet- ition.
 Thomas Maddock, state engineers is in receipt. of telegram from J. $. Bright. U. $. district engineer at Den yer. in which the government repre- sentative notes that the Bureau of Public Roads would disapprove of the thrilled crushed rock base type of pay ing. At the same time Bright in formed the state engineer that the basic patent on Warren Brothers bit ulithic paving will expire in May of this year. but that amendments and supplementary patents extend prob ably until 1928
 Here is MT. Maddocks query:
 Phoenix, Ariz.. Dec. 27, 1919. J. S. Bright, District Engineer,
 Denver. Colorado.
 Please advise if Bureau of Public Roads would allow federal aid on pavement of six-inch crushed rock and two-inch bituminous or Topeka v peting type account royalty? When will bituminous patents expire?
 STATE ENGINEER. This is Mr. Bright's reply:
 Denver. Colorado, Dec. 30. 1919. State Engineer,
 Phoenix, Arizona.
 Burs<u will not approve thrilled crushed rock base period base period hrc m ant axnfrRS May nineteen twenty but amendments and supplementary patents extend probably to nineteen twenty eight and their effect on base patent is unknown
 BRIGHT. On Friday, Mir Maddock sent the following letter to the Maricopa Coun- ty Highway Commission:
 January ?, 1920. Maricopa County Highway Com.
 Phoenix, Arizona.
 Gentlemen:
 Tn order to avoid possible future misunderstood nding, I am sending you a copy of a telegram from this depart ment to the Bureau of Public Roads, district engineer in Denver, together with his answer.
 Under this ruling it would be i'm possible to secure federal aid from present or future funds allotted this state should you adopt from your vari- ous types of pavement the one pro- viding for inches of loose rock base and inches of hard surface top.
 Hoping that this information will be of some slight service to you, I am
 Yours respectfully.
 THOS. MADDOCk,
 State Engineer The fact that the government en- gineers refuse to endorse a pavement consisting of inches of loose rock, and inches of surfacing. either pat ented or not. said Mir. Maddock, will probably influence the county high way commission in eliminating this type of construction which would un- doubtedly have been cheaper than crushed rock mixed with asphalt or Portland cement.
 Many people will be interested in knowing that the bitulithic basic patents expire in May of this year." he said, The royalty on this type, at p cents a. square yard, would amount to $733,920 for an 1S-foot pavement for PTS miles of road
 While changes in the system of lay ing asphalt top have been made in the last few years, and patented by those interested concluded the state engineer 'it is believed that fully 90 per cent of the asphalt pavements in the city of Phoenix is laid under the original basic patents alone. the ex piration of which will permit the coun- ty and city to use this type without paying royalty.