Lands within National Forests may be selected for administrative uses such as Supervisor's and Ranger's headquarters, gardens, pastures, corrals, planting or nursery sites or rights-of-way. These administrative sites are necessary for the present and probable future requirements of the Forest Service for fire protection and the transaction of business on the National Forests. WATER POWER, TELEPHONE, TELEGRAPH, AND POWER TRANSMISSION LINES Along the streams within the National Forests are many sites suitable for power development. These are open to occupancy for such purposes and have the advantage of being on streams whose headwaters are protected. The aggregate capacity of the water power sites on the National Forests is estimated at 12,000,000 horsepower. [Illustration: Figure 77. North Clear Creek Falls, Rio Grande National Forest, Colorado. The National Forests contain about one-third of all the potential water-power resources of the United States.] [Illustration: Figure 78. The power plant of the Colorado Power Company, on the Grand River, Holy Cross National Forest, Colorado. Every fiscal year there is a substantial increase in water power development on the National Forests.] The Government does not permit the monopolization of power in any region or allow sites to be held for speculative purposes. The objects of the regulations are to secure prompt and full development and to obtain a reasonable compensation for the use of the land occupied and the beneficial protection given the watershed. Permits for power development on the National Forests usually run for a term of 50 years and may be renewed at their expiration upon compliance with the regulations then existing. Such permits, while granting liberal terms to applicants, contain ample provision for the protection of the public interests.