scope:

This manual will focus on the "training structures" component of navigation channel design in mainly open-river channels; however, many of the types of structures presented can and have been used in lock and dam systems. The information in this manual is applicable to "open-river" projects (no locks and dams) and "run-of-the-river" projects (low-head locks and dams with no reservoir storage capacity). High-head locks and dam projects have deep upstream pools and do not need channel training structures except for the reach immediately downstream from the lock structure. Channel width, depth, alignment, and maintenance dredging are covered in ASCE Manual of Practice No. 94. Subjects included in this manual are planning, design, construction, cost, repair, environmental impact, model studies, and case histories.

PURPOSE

This manual presents design guidance on various types of waterway training structures. These structures confi ne and stabilize a channel by reshaping it to create reliable depths and widths for safe and dependable vessel transit. The goal of river training systems is to provide the desired channel dimensions and alignment with little or no maintenance dredging. The proper use of dikes and revetments can achieve this goal, as shown by Fig. 1-1. Navigation channels can be in rivers (one fl ow direction) or in coastal areas (reversing tidal fl ow). This manual is confi ned to river systems. These river channels are subdivided into "open river" and lock and dam systems built in existing rivers. Information on tidal channel training structures can be found in ASCE Manuals and Reports on Engineering Practice No. 107, Ship Channel Design and Operation (McCartney et al. 2005). Appendix I provides a list of numerous terms related to channel training works presented in this manual.