07040-015 Saylor Creek Watershed Final Report

Phase 2 of the Saylor Creek Improvement Project is focused on channel restoration. The existing stream channel is generally incised, running through areas primarily covered with heavy trees, brush and weeds. The ravine ranges from 6 to 20 feet deep through the corridor with very steep slopes in several areas. In two areas storm outlets are undercut or suspended above the channel. Tall undercut, eroded banks exist along several of the outside bends. Sediment deposition on the inside bends limits the cross-section of the channel, increasing flow velocity and forcing this faster flow toward the eroded outside bank. A wide array of practices will need to be implemented to address channel erosion. Improvements will be specifically tailored to address problems observed at each bend. The result will be a channel with a more natural appearance, and reduced use of hard armor and revetment. Some sections will require minimal grading with removal of underbrush for improved maintenance access and more sun exposure, better allowing deep­ rooted plants and flowers to establish to provide further erosion protection. Straight sections with steep banks will require grading to pull back slopes, increasing the creek's capacity to convey storm flows at slower velocities. Sections with sharp bends will require slope pull back and armor protection. A constructed wetland will collect and treat runoff from a small sub-watershed, before being discharged into the main tributary.

Ultimate Load Behavior of Full-Scale Highway Truss Bridges: Phase I - Ultimate Load Tests of the Hubby Bridge - Boone County, Interim Report, HR-169, 1975

As a result of the construction of the Saylorville Dam and Reservoir on the Des Moines River, six highway bridges crossing the river were scheduled for removal. One of these, an old pinconnected high-truss single-lane bridge, was selected for a testing program which included ultimate load tests. The purpose of the ultimate load tests, which are summarized in this report, was to relate design and rating procedures presently used in bridge design to the field behavior of this type of truss bridge. The ultimate load tests consisted of ultimate load testing of one span of the bridge, of two I-shaped floorbeams, and of two panels of the timber deck. The theoretical capacity of each of these components is compared with the results from the field tests.

Ultimate Load Behavior of Full-Scale Highway Truss Bridges: Phase II - Service Load and Supplementary Tests, Interim Report, HR-169, 1975

As a result of the construction of the Saylorville Dam and Reservoir on the Des Moines River, six highway bridges crossing the river were scheduled for removal. Two of these were incorporated into a comprehensive test program to study the behavior of old pin-connected high-truss single-lane bridges. The test program consisted of ultimate load tests, service load tests and a supplementary test program. The results reported in this report cover the service load tests on the two bridges as well as the supplementary tests, both static and fatigue, of eyebar members removed from the two bridges. The field test results of the service loading are compared with theoretical results of the truss analysis.