Thrills

https://digitalcommons.library.umaine.edu/mmb-vp/6468/thumbnail.jp

Roughness as a Factor in Culvert Hydraulics

In conjunction with the oral discussion of Roughness as a Factor in Culvert Hydraulics, which has been scheduled for the coming meeting of the Research Committee, I have assembled a few notes and diagrams with which you may wish to become familiar. It is intended that this material serve as a guide in a simplified approach to some of the basic considerations in the analysis of culverts, and not to be all inclusive

Head Determinations for Structures on U.S 23 that are Affected by Raising the Normal Pool Elevation of Ohio River Lock and Dam No. 30 at Greenup, Kentucky

During a visit to this office on July 3, 1952, Mr. J.O. Cornell requested the assistance of the Hydraulics Section of the Research Laboratory in investigating the possible head to be expected on the drainage structures on U.S. 23, that would be influenced by the proposed raising of the normal pool elevation of Ohio River Lock and Dam No. 30 at Greenup, Kentucky. In order to better evaluate the head to be expected, I have approached the problem from an analytical standpoint, outlining and comparing the results from three suggested methods. The results of the analysis of the three separate approaches are very similar which indicates that the resulting values are reliable

A Hydraulic Analysis of the Channel Relocation of Stephens Creek

Recently Mr. J.O. Cornell requested the assistance of the Drainage Section of the Research Laboratory in investigating the channel that the U.S. Corps of Engineers has designed in conjunction with the raising of Dam No. 39 and the changing of the locking system. The principal reason for this investigation was to determine the effect, if any, that this project will have upon the five-span highway bridge on U.S. 42, located approximately two thousand feet upstream from the confluence of Stephens Creek and the Ohio River and at the upstream end of the new channel

Sunshine Alley

https://digitalcommons.library.umaine.edu/mmb-vp/4883/thumbnail.jp

An Investigation of Bituminous Coatings and Pavements on Corrugated Metal Culverts

The object of this inspection was to determine the efficacy of bituminous coatings and paved inverts on corrugated metal pipe and culverts installed on Rural Secondary Projects during the past few years. The study originated after earlier investigations had led to recommendations concerning the resistance of various types of pipe and culvert materials in the presence of acid-bearing waters

Hydraulic Model Studies of Culvert Operation

Since 1951 the Division of Research has been engaged in a comprehensive study of highway drainage problems. This study has included special investigations of rainfall and runoff, drainage structures in use and the practices used in their design, culvert hydraulics, and other relevant investigations. To date, reports have been published concerning runoff and rainfall variables (1 and 2)* and the effects of barrel roughness upon culvert operation (3), together with the preparation of a drainage manual for the use of Highway Department engineers and consultants. The most recent special project, part of the over-all study, has dealt with the effects of inlet geometry upon the operation of culverts under entrance control. The procedures of this study have been somewhat unique in that they have made use of a scale model of a box culvert, set up in such a way that its operation could be closely observed and accurate readings could be made of water pressures, discharge quantities and the like. Although rather summarily reported on previously (4), the methods, underlying theories and results of this study are the subject of this report

A Survey Inspection of Plain Corrugated Metal Pipe Arches and Multi-Plate Metal Pipe Arches In Kentucky

Past observations have indicated that rusting has been rather prevalent in the large, un-paved metal drainage structures most of which have been installed since the opening of the Kentucky Rural Secondary Program in 1949. Since all of these structures are relatively new, and since rusting in any form can be considered a threat to the life of a structure, the Chief Engineer\u27s Office, in 1954, requested that a study be made to determine the over-all frequency possible causes, and individual seriousness of this condition. Altogether, a total of 86 of these un-paved structures were inspected. Although it would have been virtually impossible to inspect every one in the state, a pattern was followed which was believed to provide a representative and sufficiently large sampling. This pattern, by counties and by number of structures inspected per county, is shown in Fig. 1. Structures were located for inspection by use of the R. S. Final Estimate Forms. Almost all of the structures inspected showed evidence of rusting in one form or another. Moverover, the condition was found in areas where testing for acidity, using methyl red and methyl orange pH indicators, indicated no serious acidity of the water, sometimes heretofore thought to be prerequisite to rusting. A number of arches were found to be in need of immediate attention, and it was noted that the life of many others could undoubtedly be extended by a protective treatment of the inverts

Model Study of Flow Through Culverts

Within the past four years, the Highway Materials Research Laboratory has expended considerable effort upon investigating and developing new approaches to the problem of estimating the quantity of runoff from small drainage areas. Particular interest has been given to areas of sizes that require culverts or small bridges with less than twenty feet of span. The results of these studies have been included in the Drainage Manual recently adapted for use by the Department of Highways