Excerpt from Comparative Design for a Highway Bridge: Thesis The site is along Spring Creek about one and one - half miles outside of the city limits of Springfield, Illinois. This water way is a shallow stream, carrying a comparatively large quantity of water during the spring season only. The concrete structure in place is of the girder type. The material is a gravel concrete of the following proportions, 1 part I cement, 2 parts sand, and 4 parts gravel. The substructure i and floor were placed in the late fall of 1910; but as cold weather! Overtook the work, it was suspended for the winter and the girders added in the following spring. 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.