Wendell R. Gwinn

George G. Hebaus

A Laboratory Evaluation of Trash Racks for Drop Inlets

Excerpt from Model Study of a Box-Inlet Chute Spillway and Saf Stilling Basin A scale model of a proposed box-inlet chute spillway and Saint Anthony Falls (saf) stilling basin for Boomer Lake, Stillwater, Okla., was tested to determine the head-discharge rating and required riprap. Lest results indicate that the riprap should have a mean diameter of 1 foot or more and that the trapezoidal channel at the stilling-basin exit should have 3 1 side slopes, with the bottom as wide as the distance between the basin sidewalls and level with the top of the end sill. Some thickening of the riprap would be necessary for the probable maximum ﬂood event, which the spillway could pass without overtopping. Index terms: box-inlet chute spillways, head-discharge ratings, riprap, saf stilling basins, scale models. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Wendell R. Gwinn

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