THE USE BOOK. 65 



permission from the county. It has been generally set- 

 tled by the courts that telephone lines, when constructed 

 along a highway, are an additional servitude, and that 

 the owners of abutting land can require compensation 

 for damages through the construction of such telephone 

 lines. The State legislature can empower a county to 

 impose such an additional servitude upon private lands, 

 provided reasonable compensation is paid, but it can 

 give no authority to impose it on the lands of the 

 United States. 



DAMS, RESERVOIRS, AND CONDUITS. 



Before issuing any special-use permit for dams, reservoirs, 

 and conduits on National Forest land, the supervisor must refer 

 the application to the supervising engineer of the Reclamation 

 Service in charge of the district concerned. The reports accom- 

 panying the Forester's copies of supervisors' permits for dams, 

 reservoirs, and conduits must always show that the permits are 

 approved by the supervising engineer of the Reclamation 

 Service. 



POWER PLANTS. 



A commercial power plant is one for the generation 

 of electrical energy for sale. 



All supervisors' permits for noncommercial power 

 plants must specifically provide that if any of the 

 power developed under the permit is sold, the permit 

 shall thereupon be subject to modification in the discre- 

 tion of the Forester. 



REG. 16. Applications for special-use permits for com- 

 mercial power plants shall consist of maps in duplicate, 

 on tracing linen, showing the project as surveyed, and 



696210!) 5 



