Arizona republican., 1920-03-17
STATE PAVING
 CHEAPER THAN '
 C0UNTY'S BIDS
Highway Jobs, Some Now In Progress, Apparently To Cost Far Less Than Bids Made To County Highway Commission

Highway costs, incurred under the management of the state engineers office, appear to be lower than esti- mates of the proposed costs for high way paving work as shown by bids re- ce1vcd by the Maricopa county highway commission, according to figures just compiled from the records of the state engineer and the published reports of the county highway commission.
 The comparisons show that the states work on the Mesa-Tempe high way. now in progress, is costing 37 per cent less than the proposed cost ac- cording to bids received by the county highway commission for work of the same descriptions; and that the states work on the sa-Tempe highway for another class of construction is 9 per cent less than that of biGs received by the county highway commission.
 Grading costs per mile, varying from S2.1Oo to s4,o00, are not included in the comparisons because local topo- graphical variations would not be sub Ject for average comparisons. The cost of cement is based on the unit price per barrel to the amount used per square yard, the factor 3.25 being used for county figures and 3.7 for state highway prices.
 These Jobs Compared The following five paving jobs are take for comparison, two as bid for the county. and three that are now un- Ger construction by the state:
 No. 1 job is under the county's $4.ooo,o0o project, and calls for six inch concrete paving IS feet to $a.1s.
 No. ? job is the states Tempe Mesa, $16oo00 job, calling for six wide, the total cost per square yard amounting to S2.32.
 Florence s11o,ooo job. eaIiins for six-inch concrete pavement 1s feet wide, the total cost per square-yard amounting to SPA.
 No. 4 job is the states Tempe Mesa $4o,oo0 job of two inch bitu- iithic on four-inch concrete, 18 feet wide, the total cost per square yard amounting to S2.377.
 No job is under the county's S4,oo0, 900 project, calling for two inch biiutithic on crushed rock base, 16 feet wide, the total cost per square yard amounting to
 Three Factors The totals of cost per square yard in | III five jobs are based on three factors, ] the first factor being the combined. cost | of labor sand, and stone. the second l factor being the cost of cement, nd the | third factor being the cost of freight. l The cost of freight is based upon the | unit freight price per barrel to the 1 amount used per square yard. 94 l ptA SdSd, per OdETei, OT 37e pounds at g cents per hundred. 1 The itemized costs, per job, are given | below:
 Job No. 1.-Labor. sand and stone, $2.17; cement, s.6o; freight,
 Job No. 2-Labor. sand and stsssne, s1-54; cement, $:4e; freight,
 Job No. s-Labor, sand and stone, $1.47: cement, s.45; freight, S.32.
 Job No. 4-Labor, sand, asphalt and stone, $1.s5; cement, $.252; freight $.175.
 Job No. 5-Labor, sand and stone, S2.27; asphalt instead of cement, and freight charge included, $.217; royalty, st.10.
 Cost Per Mile
 The following figures, per mile | based on cost per square yarG, follow | in order of jobs:
 1.lcounty, 16 it., in. con, S2e.27s.o5.
 Estate, IS ft, in. con-, $23,-
 s-.state, 1s ft, 6 in., con-, s2s,- 554.4o.
 4-State, IS ft., bituIthic, $25- 101.12.
 5-county, 16 ft., bituIithic, $24,- 284.37. ]. Easing the actual cost of 6-inch | concrete pavement 16 feet wide (coun- | ty) at s3-19 per square yard, the cost | per mile Cor 9,3s7 square yards) would | be s29.27S.05.
 2. Easing the actual cost of 6-inch concrete pavement IS feet wide Estate |