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I I I I I I I I I I I I 1 I I I I I I Apart from the 1 imitations on capacity, the physical conditions of the raw water supply facilities varies widely. A general description of the condition of major system components is as follows: Reservoirs. For purposes of this report, only the lower level reservoirs will be addressed, namely, Juniata. Purdy Mesa and Reeder. In 1985, an inspection of the Reeder, Purdy Mesa and Juniata dams was made by a representative of the State Engineer's Office. The investigation found both Purdy Mesa and Juniata to be "conditionally satisfactory and the state of maintenance good". At Juniata dam. which has a Class I hazard classification. the State's main concern is erosion on the downstream slope. At Purdy Mesa. a Class II hazard classification, their concern is that the spillway needs rehabilitation. The City is currently taking steps to resolve these issues. Reeder Reservoi r is under an ei ght foot fill i ng restri ct i on imposed by the State Engineer's Office. due to the presence of seepage on the downstream face of the dam. Access and inspection is made difficult by heavy vegetation in the embankment area. See Chapter 4 for further discussion of the status and potential of Reeder Reservoir. Flow Lines. In 1972 HDR performed an evaluation of the Kannah Creek and Purdy Mesa flow 1 ines. The major areas of deficiency were del ineated. with the primary concerns being badly corroded steel pipe and entrapped air. The net effect is a gradual decrease in capacity. both voluntary (to protect corrosion- weakened pipe from blowout). and involuntary (due to air entrapment). Specific recommendations were made to extend the pipeline serviceability. some of which have been implemented. An updated evaluation is being considered by City staff at this time to determine the maximum service life of the flow lines. 2-7