... and a laterite bottom put in; so far as he knew, that runway had remained in use until the permanent strip had been completed. When introducing' the Paper, the Author had paid special attention to the ditches. It was usual in Singapore, even with large ditches, to pave them with half-round inverts and pre-cast...

... SHALLOW DRAINS OPEN DITCHES STABILITY SLOPES EMBANKMENTS NON COHESIVE VERTICAL SAND BIBLIOGRAPHY EUREKA CALIFORNIA USA .THE INSTITUTION OF CIVIL ENGINEERS ROAD ENGINEERINGDIVISION MEETING. Tuesday. 12 November. 1946. WILLIAM HENRY MORGAN. C.B.E., D.S.O., M.I.C.E., Chairman...