. Engineering and Contracting. e recent works, anexamination of the designs seems to indicatethat the details adopted and the experienceobtained at Columbus have served as a basisfrom which to work. Lei-ee.—For protection from floods theworks are surrounded by a levee about ti,looft. long, its top being G ft. above the highestrecorded water level in the river and from10 to 15 ft. above the ground. The levee is16 ft. wide on top, and has side slopes of 1%horizontal to 1 vertical, the inner slope beingdressed with loam and seeded. SEPTIC T.\NKS. There are six septic tanks, four so-calledprimary
. Engineering and Contracting. e recent works, anexamination of the designs seems to indicatethat the details adopted and the experienceobtained at Columbus have served as a basisfrom which to work. Lei-ee.—For protection from floods theworks are surrounded by a levee about ti,looft. long, its top being G ft. above the highestrecorded water level in the river and from10 to 15 ft. above the ground. The levee is16 ft. wide on top, and has side slopes of 1%horizontal to 1 vertical, the inner slope beingdressed with loam and seeded. SEPTIC T.\NKS. There are six septic tanks, four so-calledprimary tanks and two secondary tanks. Theyare shown in plan in Fig. 4. and some of thedetails are shown in Figs. 5, 6, 7, 8. The primary tanks are 06 ft. 6 in. by 150ft, and the secondary tanks are 115 ft. 0 262 ft. The tanks, throughout, are of con-crete, are not covered, and are approximately12 ft. deep to the high-water fine. Each pri-mary tank has a capacity of 710,000 gals, andeach secondary tank ,000 gals. The four. Baffle Wall Collecting aud DistributitiK WallFig. 6—Section Through Tanks Nos. 4 and 6. ing. The pumping machinery is in duplicateand shown in Figs. 1 and 2. The intercepting sewer has been extendedacross under the river, a distance of about540 ft. to a sand catcher connected with theMain Sewage Pumping Station. The exten-sion consists of a 48-in. cast-iron pipe sur-rounded by concrete. To bring the dry weath-er flow of sewage from the west part of thecity to the pumping station, a new sewer, in length, has been built. For a por-tion of the way it is brick and concrete andthe remainder is concrete. At the upper endthe diameter is 3 ft., enlarging to 3 ft. 6 the concrete section is 3 ft. 6 ins. by 3ft. 6 ins. with vertical side walls. The RenickRun storm-water sewer has been extended3,050 ft. to the pumping station and river. Itis of concrete, with vertical side walls, 8 7 ft. 4 ins., enlarging to 10 ft. by 9 ft. 8 10-in. w
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