COVERED WOOD BRIDGE OVER THE TUALATIN RIVER ON THE WEST SIDE HIGHWAY
IN WASHINGTON COUNTY BUILT IN 1918
The grading in Washington County will cost complete approximately $39,699.85 of which Washington County has paid $9,395.00. The part of the paving within Washington County will cost complete $234,750.00 all of which is paid for from State Funds.
DETAILED STATEMENT OF EXPENDITURES TO NOVEMBER 30, 1918
GRADING AND PAVING MULTNOMAH COUNTY LINE TO NEWBERG
| Engineering | $ 9,445.56 | |||
| Right-of-Way Costs | 49.98 | |||
| Construction: | ||||
| Crushed Stone Shoulders, 163,663.4 lin. ft. @ .06 | $ 9,819.80 | |||
| Standard Bitulithic Pavement, 149,764.4 Sq. Yds. @ $1.28 | 191,698.43 | |||
| Broken Stone, Loose Measure, 34,885.75 Cu. Yds. at $2.40 | 83,725.80 | |||
| Clearing and Grubbing | 1,250.00 | |||
| Common Excavation, 46,773.9 Cu. Yds. @ .34 | 15,903.13 | |||
| Intermediate Excavation, 9,224.4 Cu. Yds. @ .62 | 5,719.13 | |||
| Solid Rock Excavation, 385 Cu. Yds. @ $1.15 | 442.75 | |||
| Overhaul per 100 Lin. Ft., 172,279.2 Cu. Yds. @ .01 | 1,722.79 | |||
| 12-inch Reinf. Conc. Pipe, 1,568 Lin. Ft. @ $1.25 | 1,960.00 | |||
| 24-inch Reinf. Conc. Pipe, 52 Lin. Ft. @ $2.45 | 127.40 | |||
| 36-inch Reinf. Conc. Pipe, 96 Lin. Ft. @ $4.25 | 408.00 | |||
| 6-inch Porous Drain Tile, 7,191 Lin. Ft. @ .15 | 1,078.65 | |||
| Rip-Rap, 32 Cu. Yds @ $2.75 | 88.00 | |||
| Force Account: | ||||
| Lowering and lengthening existing culverts | 1,081.67 | |||
| Replacing bridge approach at Tualatin River | 50.27 | |||
| Special wide ditches alongside road near Four Corners | 814.50 | |||
| Back-fill and planking at Onion Flat Trestle | 405.94 | |||
| Tearing down old trestles at Onion Flat | 55.33 | |||
| Replacing private water supply crossing | 13.31 | |||
| Rebuilding Right of Way Fences | 70.85 | |||
| Grading at Middleton R. R. Crossing | 1,970.47 | |||
| Blind Drains | 189.68 | |||
| New 30-foot Culvert | 223.60 | |||
| New 42-foot Culvert and special fill over it | 468.26 | |||
| Drain Tiling, back-filled with rock | 582.09 | |||
| Total amount earned by Contractor to Nov. 30, 1918 | $ 319,869.85 | |||
| Less amount retained pending completion of contract | 50,388.46 | |||
| Total paid contractor to November 30, 1918 | 269,481.39 | |||
| Total expended to November 30, 1918 | $ 278,976.93 | |||
Onion Flat Bridge
This crossing consists of a laminated wood deck on heavy stringers supported by a series of creosoted pile bents. It is on the West Side Highway about four miles southwest of Tigard and is designed for heavy traffic loading.
An asphaltic wearing surface prevents moisture coming in contact with the wooden floor and with the treated piling tends to give the maximum length of life to the main members of the structure. This bridge is 600 feet long and cost complete $8,372.22.