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<br /> <br />classified as <br />162 (b) of the <br />August 1977. <br />standards. <br /> <br />a Class II <br />Clean Air <br />Current air <br /> <br />area under Section <br />Act, as amended in <br />quality meets these <br /> <br />b. Fire <br /> <br />The Sangre de Cristo WSA is not an area of high <br />fire occurrence. Because of the extensive <br />visibility, fires are generally detected early <br />before becoming large. However because of the <br />rugged terrain and susceptibility or expOsure <br />to winds there is the potential for occasional <br />large fires. Potential threat to private <br />property or values outside the WSA is generally <br />considered low. <br /> <br />c. <br /> <br />Integrated Pest Management. <br /> <br />; <br />~ <br />i <br />! <br /> <br />Overmature ponderosa pine in the study area has <br />been attacked by the mountain pine beetle in <br />recent years. Outbreaks of this pest are still <br />active, although epidemic situations are not as <br />prevalent now. <br /> <br />Western spruce budworm is active in <br />Douglas-fir/White fir stands throughout the <br />area. Defoliation has been severe in some <br />stands and is expected to remain stable or <br />increase in the near future. See Figure 8. <br /> <br />9. Hydrology and Water Quality <br /> <br />The eastern portion of the Sangre de Cristo WSA <br />includes parts of 13 watersheds, all of which are <br />tributaries of the Arkansas River. <br /> <br />The western portion of the National Forest WSA <br />includes parts of 14 watersheds which are all <br />tributaries of the Rio Grande River. <br /> <br />All of the streams are classified as having A-type <br />stream channels. The channel gradients are very <br />steep and stable for the most part. The stream bed <br />and channel banks are composed of large, coarse <br />material. The streams are fairly deeply entrenched. <br /> <br />50 <br /> <br />-'("')6'-8 <br />l ',) ... :J <br />