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. Reeistration Requirements: Integrity Considerations: In addition to having significance as <br />outlined in the previous section, the railroad must also retain essential chazacteristics and <br />physical features that convey its historical identity. The National Register identifies seven {7) <br />elements of integrity including: location, design, setting, materials, workmanship, feeling; and <br />association (USDI-NPS). <br />These elements of integrity are very broad brush. To make them easier to use with the railroads <br />the following descriptions have been developed. <br />A modern rail line may overlay a historic route/resource. For example, if the character and <br />feeling of the original or historic rail line has been lost by construction of a modem, high speed <br />railroad on the same route, then, while the overall railroad system may be significant, the historic <br />railroad segment is not, due to a loss of integrity. Similarly, ifa stream was once crossed bya <br />bridge, but the crossing has been replaced by a fill and culvert then the bridge is no longer extant <br />and thus can not be considered significant. Precise location will likely have varied over time, but <br />if the railroad stayed in the general azea, for example, along the stream or ridge, then locational <br />integrity will be considered extant. In all cases, drastic rerouting such as from one drainage <br />bottom to another, integrity of location will have been lost. Closely associated with location is <br />the element of setting. Minor rerouting, such as a rail line at drainage bottom that moves from <br />one side of a drainage to the other shall be considered to have integrity of setting. Those, for <br />example, that have been removed from the drainage to a different locale shall have lost setting <br />• integrity. Association of the transportation resource to its immediate natural surroundings will be <br />the measure of integrity of location and setting. <br />To determine if a resource retains integrity from naturally occurring processes a different test <br />may be used to detect the presence of historic fabric and function. The measure of this <br />requirement shall be passage. Routes that remain passable by the same method of transportation <br />for which they were originally built shall be considered to have maintained their design and <br />workmanship integrity elements.. If, however the passage test is failed other tests may be applied: <br />For example, rail lines that have been abandoned and the tracks removed no longer remain <br />passable by trains. However, if the roadbed remains reasonably intact and due to general size, <br />profile and grade remains cleazly discernable as once having been a railroad; then the segment <br />shall be considered to have integrity as a railroad. However, if the roadbed that remains has been <br />heavily impacted by either man or nature and it no longer conveys the sense of its fabric or <br />historic function/purpose then it shall be considered to have lost its integrity. Equally, if once <br />extant features, such as railway stations, are no longer present, those portions of the route shall be <br />considered to have lost thew historic, functional integrity. If remains of those features aze found, <br />they steal] be considered.for their archaeological potential to address the reseazch concerns <br />discussed in the previous pages. For railroad associated azchaeological resources to be <br />considered eligible they must also have integrity of azchaeological context and not exhibit <br />evidences ofpost-depositional distwbance. To be considered to have integrity an archaeological <br />deposit must be in an undisturbed matrix and not exhibit signs of secondary depositional context. <br />u <br />33 <br />