Flood Mitigation EA

The National Park Service (NPS) at Coronado National Memorial in cooperation with the Federal Highways Administration (FHWA) is proposing to re-surface, restore and rehabilitate the previously paved 3.5 miles of roadway within the memorial and to provide a sustainable drainage system along the paved portion of the roadway. The purposes of the project is to address healthy and safety concerns related to the aging roadway infrastructure that has reached the end of its structural integrity, enhance the experience of park visitors and restore the aggraded channel within Montezuma Wash. Extreme flooding in recent years has altered the channel of Montezuma Wash and it is currently threatening the stability of the road. The Coronado Cave Trail is currently located within the channel of Montezuma Wash. Due to the extreme flooding events experienced in the past few years maintaining this portion of the trail has come at an increased expense and a repetitive maintenance issue. East Montezuma Canyon Road has been determined eligible for listing on the National Register of Historic Places by the Arizona State Historic Officer (SHPO). Informal vehicle pull offs along the road shoulder have developed without environmental planning. These pull off areas are primarily used by law enforcement agencies but occasionally they are used by park visitors. The memorial's location on the international border results in a high volume of law enforcement vehicular traffic and the parking along the road shoulder has increased in recent years.

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