Many different culvert options are available for stream crossings comprising of a no slope design, a hydraulic design, or a stream simulation design. When considering any one of these designs many concerns need to be addressed including; direct habitat loss, water quality, upstream and downstream channel impacts, ecological connectivity, construction impacts, and possible failure. Direct habitat loss can occur if the culvert is installed in current fish spawns, growth areas, feeding areas, or migration areas. Water quality is effected during construction of the culvert as dirt particles or other foreign material enters the stream. Upstream and downstream channels are affected if flow rates are changed by water depth or channel depth and can further effect stream qualitie...
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...gns are a few of the more acceptable options concerning this issue. Each option has many advantages and disadvantages although a bottomless steam simulation culvert can be considered to more effective for complete mitigation of all effects a roadway crossing has on a stream’s ecosystem. Baffles can be considered a fantastic option if conditions to not allow the development and construction of a new culvert system. Although baffles will not fully solve the problem it will allow sufficient migration of even weak fish species. There are a vast number of negative effects even a single roadway crossing can have on a stream, and it is the responsibility of all engineers and society to moderate its effect with greener solutions.
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