Abstract: This invention relates to a novel environmentally compatible culvert system. More particularly, this invention relates to a novel multi-component modular environmental culvert system which is constructed of reaction injection molded components, comprising modular interconnecting bases, modular interconnecting corrugated arch systems, and modular joining binders. A modular culvert system comprising: (a) at least one base grid module; (b) at least one corrugated arch module resting on the grid; and (c) an arch shaped binder module adjacent the arch module.