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Abstract:The purpose of the Colorado statewide historic bridge inventory was to document and evaluate the National
Register of Historic Places eligibility all on-system highway bridges and grade separation structures built in
Colorado between 1959 and 1968. The results of this study were to be documented in a searchable database, in
individual historic bridge site forms, and in Multiple Property Documentation Form (MPDF), a report that
includes a historic context and provides guidance for evaluating historic properties. The project scope also
included an update to information about the listed, eligible, or possibly eligible bridges identified in CDOT’s
previous bridge inventories from 1983, 1987, and 2000. The project was not completed during the contract
period, so all of the data is in draft form and there are no results to report.
Implementation:
The results of the inventory will be used by the history staff at CDOT Headquarters and Regions 4 and 6 in
coordinating compliance with Section 106 of the National Historic Preservation Act for projects involving
bridge replacement and repair. It will be distributed to each of the CDOT transportation regions for use in
project planning. The survey will also be used by the Colorado Office of Archaeology and Historic Preservation
(OAHP) and local historical societies, preservation groups, certified local governments, and other organizations
interested in historic bridges. The results of the study will be distributed to agencies and groups and once the
study has been completed, a copy of the inventory will be housed at the Colorado OAHP for use by historians,
consultants, preservation groups, and members of the public.
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