This dataset denotes the approximate locations of historical fill areas within the City and County of Denver (CCoD) and with within approximately three-quarters of a mile of the CCoD boundaries. The data was developed in 1997 by Pinyon Environmental Engineering Resources, Inc. (Pinyon) who at the request of CCoD completed an Historical Fill Area Evaluation using documents and research involving several regional and national sources listed in the Lineage, Process Step 1" section of this document. Locations of historical fill areas are approximations and should not be used for detailed planning or engineering purposes.