| OCR Text |
Show PART II DESCRIPTION OF REGION Clear water being released from Glen Canyon Dam. Biological quality of surface water, characterized by nutrients, dissolved oxygen, and bacteria concentrations, is considered very good, except for some localized problems. Drainage from abandoned and active mines is estimated to eliminate some 120 miles of stream fisheries. Land The Upper Colorado Region includes 72,639,000 acres, of which 72,234,000 acres are land areas and 405,000 acres are water bodies of more than 40 acres. Of the 72,234,000 acres of land, approximately 2,225,000 acres are cropped, 23^987,000 acres are in forests and woodlands, and the remaining 46,022,000 acres are in grass and browse rangelands, barren areas, and urban and built-up areas. Of the cropped land 1,622,000 acres are irri- gated and 603,000 acres are dry cropland. The areas of alpine mountain peaks and barren and inaccessible land are extensive while the urban and built-up areas constitute less than 1 percent of the area. Nearly two-thirds of the land area is in public ownership under Fed- eral and State administration. The remainder is privately owned, with slightly mor*e than half of this in ownership by corporations and 20 |
