. Canadian engineer. Fig. 3.—View Showing Kuugh Nature of Ground Overwhich Pipe Line was Constructed. 456 THE CANADIAN ENGINEER Volume 30. material to all parts of the line. A road-bed 8 feet widewas constructed for the pipe, which was built as a Rovfline conduit. The construction of this road-bed necessi-tated the removal of alx)ut 270,000 cubic yards ofmaterial, over half of which was rock. This rock washard trap except in the section near Sooke Lake,. Fig. 4.—View Showing Timber Trestle of Construction Railway andConcrete Trestle for the Pipe Line. which was schistose. This latter
. Canadian engineer. Fig. 3.—View Showing Kuugh Nature of Ground Overwhich Pipe Line was Constructed. 456 THE CANADIAN ENGINEER Volume 30. material to all parts of the line. A road-bed 8 feet widewas constructed for the pipe, which was built as a Rovfline conduit. The construction of this road-bed necessi-tated the removal of alx)ut 270,000 cubic yards ofmaterial, over half of which was rock. This rock washard trap except in the section near Sooke Lake,. Fig. 4.—View Showing Timber Trestle of Construction Railway andConcrete Trestle for the Pipe Line. which was schistose. This latter part of the pipe line wascovered, as slides were feared. The remainder of the linewas left uncovered. In order to facilitate the work, a narrow-gauge con-struction railway was built paralleling for the most partthe line of the concrete pipe. This was built to flow linegrade, temporary log trestles being built over ravineswhich the pipe line syphoned across. The deepest svphonis 600 feet long and has a head of 90 feet general grade of the flow line is one in a thousand. lire protection. The road-bed in all other places was rockballasted. The rails used were 20 pounds and were laidon split ties of Douglas fir. Wherever it was deemednecessary for tiie expedition of the work, side tracks werecut in. As fast as the railway was available for operation theconcrete aggregate, reinforcing, timber,etc., were hauled out and permanentstructures starte
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