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I I I I I I I I I I I I I I I I functioned satisfactorily for another eighteen years. The first record of deterioration of the structure appeared in 1951 when an inspection by the SEO noted significant leakage through the dam. Shortly after this inspection the City performed repairs to the upstream face using an asphaltic compound. Between 1957 and 1974 there were several periods of concern over the structure and some minor repairs were made during this time by City maintenance crews and the dam was used under partial storage conditions. In 1974 an inspec- tion of the dam was made by the SEOt City and Rocky Mountain Consultants. A zero storage restriction was placed on the reservoir following this inspection because of the advance surface deterioration on the dam. Following the failure of Lawn Lake Dam within Rocky Mountain National Park (July 1St 1982)t the U.S. Bureau of Reclamation inspected Bluebird Dam and the other old dams within the Park under their Safety Evaluation of Existing Dams Program (SEED). The Bureau recommended that either the dam be breached or modifications should be made. The SEO ordered that the City abide by these recommendations as soon as possible. Future Plans Rocky Mountain Consultants will submit plans and spec{fications for reha- bilitation of Bluebird Dam to the SED by February It 1984. CurrentlYt either the dam may be condemned and purchased from the City by the National Park Service (and be breached to restore the area to a "wilderness" condition) or construction repairs will be made during the summer of 1984. II 1. I NVESTIGATI ON S Field work for this study was performed between August 1, 1983 and September 15t 1983. The field investigation for this study included; (1) aerial and ground surveying of the dam and reservoir; (2) geologic mapping including joint surveys; (3) visual inspection and mapping of concrete deterioration; -2-