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Collection: Directories and Documents > Historical Clippings

Historical Clippings Book - Fashion (HC-17) (451 pages)

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200 THE HIGHWAY MAGAZINE Old Timbers and Boulders in Fill F'ail to Hold Up Culvert Jacking Job 36-inch corrugated pipe economically placed near Healdsburg, California, despite unusual difficulties, as told in Pacific Road Builder and Engineering Review. By NORRIS WIGGINS direction of County Surveyor and Engineer E. A. Peugh and under the supervision of County Bridge Engineer Lyle Everett, recently completed the installation of 100 feet of 36-inch, 12 gage Armco culvert under a 15-foot fill on the West Side Road near Healdsburg in the fourth supervisorial district (Supervisor Joe Cox). The installation was necessitated by the collapse of a 15-foot concrete retaining wall which damaged the existing monolithic concrete culvert and caused the fill to slide out, undermining a portion of concrete road pavement. A series of hard rains caused the fill to become saturated behind the wall which failed under the additional pressure. The retaining wall was constructed, as was the concrete culvert, in 1910 and was not reinforced except by a number of 1-inch tierods through the fill. The wall was raised in 1917 and was 110 feet long with a 24-inch base and 12-inch top. S Girectio County, California, under the In order. to salvage the remainder of the pavement and fill, it was necessary to jack 38 feet of corrugated culvert pipe through the fill. It was also advisable, as long as a portion of the fill had to be replaced and as it was located on a dangerous curve, to widen it and decrease the curvature. This required approximately 2500 cubic yards of fill material which was secured from a nearby embankment by means of a one-half yard gas-shovel and two trucks. The shovel also removed the debris from the collapsed wall and prepared the bed for the 64 feet of outlet culvert extension. It was necessary to jack the culvert downstream, instead of upstream, which is the usual procedure, because of the debris and marshy conditions on the downstream side. Also it was advisable to utilize a three-foot oak tree as a back-stop for the jacking equipment on the upstream side. The jacking was accomplished by six men working night and day and required 235 man-hours of work. Collapse of retaining wall and portion of pavement created a dangerous condition.