Electric railway rails—
Manul'acture and delivery . _ . _ _ . . _ t _ . _ _ _ . _ . _ , . _ . . _ . . . . . _. 3.0th per pound Erection .............................................. _ _ 0.400 per pound Concrete roadway slab and bitulithic paving . . _ _ . . l _ _ . _ _ . l . .- “.18 per square yard
Concrete sidewalk slabs . _ _ . _ _ . ._ _ . _ . . _ _ . . . . _ _ _ . . _ . _ _ _ _ _ _ _ _ _ _ 2.10 per square yard
Appamnnes—ln Vancouver:
Embankment in place (net) ............................... _. 13.24c per cubic yard Rock fllls . . . _ . _ . _ _ _ _ _ _ _ _ _ _ _ _ . _ _ . . _ . . . . _ . . . _ . _ . _ . i _ . _ c _ _ . . __ $2.00 per cubic yard
(solid measurement) Concrete slope protection slabs _ . _ . _ . . _ _ . _ . . . _ . _ _ . . . . . V . , _ . _. .80 per square yard
(:urbs _ _ _ _ . _ _ _ _ _ _ _ _ _ . _ _ i _ _ _ . . _ _ _ , , i _ . . _ _ . _ _ _ _ . _ . _ _ _ . . . . _ _ _ . 11.00 per.cubic yard
Sidewalks . _ . . . . . _ . . . . . _ _ _ . . . . . i . . . . _ . . . _ _ _ _ . _ _ _ _ _ _ . _ , . , _ _ __ .80 per square yard
Concrete paving base . . . _ _ . _ . . _ . . . _ . _ . _ _ _ _ _ , i . _ . . . . . _ _ . . _ _ . __ .70 per square yard
Broken stone in paving base _ _ . _ _ . . . _ _ _ _ , _; . _ . _ . . _ _ _ _ _ . _ _ A . .i 1.39 per cubic yard (loose measurement) Bitulitliic paving on concrete base _ _ . _ _ _ _ . _ . _ . _ . _ _ . _ . _ _ . . _ . . i- 1.15 per square yard Bitulithic paving on broken stone base ____________________ __ 1.17 per square yard HAYDEN ISLAND AND Estes AviaNm—z APPROACH: Embankment in place _ . . . _ _ _ . _ . _ . . . V . . _ . . . . . . l . . . . . . . . . . . . .. 13.24c per cubic yard Rock fills . _ _ _ _ _ _ _ . . . . . . . . . . _ . . _ . . . . . _ . . _ . . , . . . _ . . _ . . , , , . . .. $2.00 per cubic yard (loose measurement! Concrete slope protection slabs _ . _ . . e . _ . . _ . . . . . . . . . . . . . . . l . ._ .80 per square yard Broken stone in paving base . . _ _ _ . _ _ _ _ _ _ . . t _ , l . _ _ . . _ . , _ _ . . __ 1.48 per cubic yard (loose measurement) Bitulithic paving on broken stone base . . . . . _ . . . . . . . , . l . _ _ _ -. 1.17 per square yard Barrier fence (timber) . _ . . . _ . l . _ . . . . _ _ . _ _ . . . _ . _ _ . _ _ _ . . . . . . . . .36 per lineal foot Broken stone in shoulders _ . . _ _ . _ . _ _ _ . . . _ . . . . _ . . . . . , . _ . _ _ _ _ -_ 1.95 per cubic yard
(loose measurement) DERBY STREET Arraomznz
Embankment in place . _ _ . . _ . . . i . . . _ . . . . _ . . . . , . . . _ . . . , _ _ . . _ __ 16.48c per cubic yard Slope protection slabs _ _ _ . . _ _ _ _ _ . . . , . . . _ . l . . . . _ _ _ . . _ _ _ . . . . . _. 90.00c per square yard Rock fills . . . _ . . . . . . . _ . . . . . _ . . . _ . _ . . . . , . . . . . . _ . l . . t l . . _ _ . . .. $2.15 per cubic yard (solid measurement) Broken stone in maeadam pavement . . . , . , l . , . . . . . . . . _ . _ . . . , .- 1.95 per cubic yard
(lOOSC measurement)
MAINTENANCE
In the Columbia River Interstate Bridge and approaches you have a property which should be maintained in good condition. So maintained. there is hardly any limit to the life of the structure; but indifferently maintained, deterioration might come about with comparative rapidity.
(1) Paint:
The feature most subject to deterioration, aside from the pavement, is the steel superstructure work. To prevent rust the structure must be kept painted. For the purpose of future guidance in buying paint different makes of standard bridge paints were used—on different parts of the structure. You have thus a large, practical, comparative test of the different paints. As nearly as practicable, all paints were handled and applied uniformly, so that the paint which lasts longest, excepting accidents, should be considered the best paint for your location and conditions.
