STATE GEOLOGIST, 169 
Cleveland Main Intercepting Sewer,— The Main intercepting Sewer 
in Cleveland, is built on the Parmley patent system. It is 132 feet in 
internal diameter, and 3% miles of it are under construction. For 
nearly two miles it is 35 to 44 feet deep and only 17 feet away from the 
center line of the Lake Shore and Michigan Southern Railway tracks. 
“Two staggered rows of 2 by % inch soft steel anchor bars, 15 inches 
apart on centers, were built into each side wall, and projected above it to 
receive the main tension bars.” The transverse tension pieces were 
afterward bolted to these anchor bars and 8 lines of horizontal pieces 1% 
by 4 inch in dimensions were bolted to the transverse ribs. 
After the steel was in place over the forms, 3 inches of cement mortar 
was laid upon the forms, enclosing the inner rods, then the concrete was 
rammed upon this mortar and the outside finished with one inch of cement 
mortar. The concrete for the arch was made of 1 part cement, 3 sand 
and 744 crushed stone. The average price for this sewer is “about $62.00 
per lineal foot as compared with $75.00 per lineal foot bid for ordinary 
brick construction.” Figure 107 shows the work in detail. 
A portion of the Central Relief Sewer in Columbus, Ohio, is being 
built on the same system of construction. 
STEEL-CONCRETE WATER PIPE. 
In a new water power plant at Champ, near Grenoble, France, 6,888 
feet of a penstock, which conveys water to the turbines of the power plant, 
is constructed of steel concrete. It has a diameter of 10.82 feet and a 
uniform grade of 7 feet in the 1,000. The concrete portion was designed 
to carry a head of water of 65.6 feet. Iron bars from 0.43 to 0.87 inch in 
diameter are spaced at equal distances, longitudinally, around the barrel 
and outside of these and encircling them at right angles to the axis of 
the pipe are other bars from 0.24 to 0.47 inch in diameter. These longi- 
tudinal and transverse bars form meshes about 4.0 by 4.3 inches in 
dimensions. The pipe is from 8 to Io inches thick. About 118 feet of 
pipe was built per day. See figure 108. 3 
Cais ~ 
= Hemblar , 737° 
ee 
GL 
Sh, 
re 
ee as 
ef (Concrete Steel) By As ee a Piston. de chaux 
Beton de ciment 4 ks (Lire Concrete) 
~~~ aan wo 8 jf’. Beton de ciment 
Ve Vp armé 
(Concrete Steel) 
(Lime Wet 
_ Concrete) 
Fig. 108.—Detail of Concrete Steel Penstock. 
Water Conduit for Jersey City.—The water supply for Jersey City, 
N. J.,* is carried for several miles through a large steel concrete conduit. 
*Hngineering News Aug: 30, 1900. 
