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o 0 1 "l .~; 9 Revised Supplemental Draft Environmental Assessment-Chapter 3-Affected Environment and Environmental Consequences filings in June 1882. By November 1882, the Denver and Rio Grande Railroad was completed from the Gunnison River Valley to Grand Junction. In 1889, tracks were extended along the Colorado River, past the current site at the Price-Stubb Diversion Dam. The dam and associated pumping facilities were completed in 1911 to supply irrigation water to the Price and Stubb Ditches for use by early settlers in the Palisade area. Reclamation's review of reports and historic preservation actions for various undertakings in the affected area produced documentation of turn of the century irrigation features of historical importance, including the Price-Stubb Diversion Dam. No significant archaeological sites have been found. As a standard cultural resource protection measure, all fish passage construction contracts would require work to be . stopped if cultural resource sites were encountered. Work could not resume until measures needed to avoid or minimize adverse impacts to significant resources are agreed to by the Colorado State Historic Preservation Officer (SHPO). Protect Historic Dam Issue: The Price-Stubb Diversion Dam is eligible for listing on the National Register of Historic Places, and Federal agencies are responsible for ensuring that their actions do not adversely affect historic qualities of eligible sites. Existing Conditions: Since 1919, Palisade and Mesa County Irrigation Districts have not used the Price-Stubb Diversion Dam and associated facilities to divert flows of the Colorado River to irrigate their lands. The Price-Stubb Diversion Dam is in good condition despite a long period of non-u~e. However, there is concern that the scour hole below the dam may be undermining the foundation of the dam. The canal headworks have deteriorated, and the associated pump canal and pump plant have been destroyed over the years. E.R. Jacobson first recorded features of the historic system in 1981 to obtain a preliminary FERC permit to study its water power development potential. Reclamation also recorded the site in 1982, under the name "Palisade Dam (5ME769). The Jacobson Hydro No. 1 Project proposed to use each feature of the abandoned system in the developing the hydropower project. The application for the license (Jacobson, 1983) notes the stone lining of the diversion pool at the canal headworks is intact only on its northwest side. After its abandonment, the canal was filled in with earth. A stone wall or lining that is evident on the east side of the canal and next to the river, may be original. Only the foundation of the pump plant remains. Of all the features of the abandoned system, only the Price-Stubb Diversion Dam has not undergone extensive change or obliteration. In 1984, the SHPO determined that the dam was eligible for listing on the National Register of Historic Places-as a classic example of an ogee crest dam built between 50