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Show NPS Form 10-900-a (8-86) 0MB No. 1024-0018 United States Department of the Interior National Park Service NATIONAL REGISTER OF HISTORIC PLACES CONTINUATION SHEET Section Washington County, UT Zion National Park MRA Page however, necessitated frequent repair or replacement of the early structures. In fact, documentation indicates that the majority of existing "riprap" dates from the Mission 66 era of park development. "Bank Protection" plans from the Engineering Division, Western Office of Design and Construction, executed in January 1963, illustrate a system of twenty structures were to be built along the river for bank protection. Rock and wire were the predominant construction materials used for the riprap to be anchored, in some cases, in a concrete base. Plans indicate that new construction was both added to existing revetments (to lengthen, strengthen, or repair the older structures) and built along entirely new areas of the river bank. The 1963 plans are stamped "as constructed drawing," indicating that these plans were subsequently executed. The early revetments do not retain physical integrity from the historic period, due to the fact that most suffered extensive modifications in the mid-1960s. A few examples are completely functionless and are no longer associated with the river, having been stranded after the river changed its course. Much of the 1960s construction incorporated or expanded the earlier river control structures, thereby changing or obscuring their original qualities of design, location, materials and workmanship. SUMMARY OF CONTRIBUTING AND NONCONTRIBUTING ROAD RESOURCES: Contributing Floor of the Valley Road Culverts and drop inlets Retaining walls Parking areas: Temple of Sinawava Red Point Great White Throne Weeping Rock Court of the Patriarchs Noncontribut ing Zion Lodge Entry Area Grotto Campground/Picnic and Parking Areas* Bridle Trail Oak Creek Bridge Revetments *includes Grotto and Emerald Pools parking areas |
