WASHINGTON COUNTY

During 1917 and 1918, the State Highway Department in co-operation with Washington County has completed the grading, bridging and paving of the West Side Highway across that County. This work has involved the grading and paving of 12.5 miles and the construction of three bridges and one undergrade railway crossing. On this work, when final payments are complete, the State will have expended $292,000.00 and the County will have expended $10,000.00.

In addition to this construction, the Department has made surveys between Beaverton and Hillsboro and between Forest Grove and Gaston, and has furnished the County engineering services in connection with the grading of these two sections.

Paving—Multnomah County Line to Newberg

The pavement on the West Side State Highway between the Multnomah County Line and Newberg is 15.7 miles in length, of which 12.5 miles is in Washington County and 3.2 miles in Yamhill County. This pavement is a two-inch standard bitulithic surface on a crushed rock base. It is sixteen feet wide with a two-foot macadam shoulder on each side. The grading in Washington County and the paving in both Washington and Yamhill Counties was done by Oskar Huber of Portland under a contract awarded him on July 30, 1917. The work was started in August, 1917, and was completed in October, 1918.

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.

Fanno Creek Bridge

The Fanno Creek bridge at Tigard on the West Side Highway consists of a superstructure similar to the Onion Flat bridge, carried on wood bents on concrete foundations. A sidewalk was built on one side to accommodate pedestrians. The bridge is 70 feet long and cost $1,882.81.

Tualatin River Bridge

The bridge consists of a covered Howe truss wooden bridge of 144 foot span and 166 lineal feet of pile trestle approach.

Like the others constructed by the State on main highways, this bridge is of heavy traffic design, and the bridge and approaches have laminated wood floors with asphaltic wearing surfaces. Windows are provided at panel points to provide light and to add to the appearance of the structure. Cost $12,968.60.

Votaw Undercrossing

A grade separation was made on the West Side Highway near Votaw, wherein a wooden trestle was constructed to carry the Southern Pacific line above the roadway. The structure was designed and built under the supervision of the railroad’s engineering department.

Final settlement has not yet been made with the Railway Company, but it is estimated that the State’s share of the cost of this structure will be $4,000.00. The balance of the cost will be paid by the Railway Company, no share of the cost being borne by the County.

Survey—Beaverton to Hillsboro

A location survey was started January 1, 1918, from the West City limits of Beaverton and completed to the city limits of Hillsboro, a distance of 7.7 miles. The alignment parallels the Southern Pacific Railway on the north side of the tracks and eliminates four grade crossings. The entire section was graded by Washington County during the 1918 season.

Survey—Forest Grove to Gaston

A survey was made from Forest Grove to Gaston, a distance of approximately 6 miles. The alignment follows the existing road with the exception of a change at Dilley to eliminate two railroad crossings.

Considerable grading was done between Dilley and Gaston, reducing the grade to five per cent.

Mr. C. G. Reiter, County Surveyor of Washington County, was employed as locating engineer for the State, and also supervised the grading in both of the above sections.