NATIONAL FOBEST MANUAL. 11 



deduction will be the per cent of the total area of the reservoir sites 

 that is not National Forest land. 



(c) From the total capacity of the power site which remains after 

 deductions (a) and (&) have been made will be made a further de- 

 duction which, in per cent, shall be the product of the square of the 

 distance of primary transmission in miles and the factor of 0.001, 

 but in no case shall deduction (c) exceed 25 per cent. 



Reg. L-8. The occupancy and use of National Forest lands (other- 

 wise than by transmission lines) under a preliminary or final power 

 permit for power sites of more than 100-horsepower total capacity 

 (except permits to municipal corporations for municipal purposes, 

 or for irrigation, or for temporary construction of project works as 

 in this regulation hereafter specified) will be conditioned on the pay- 

 ment in advance for each calendar year of a rental charge calculated 

 from the " rental capacity of the power site," as defined in Regula- 

 tion Lr-7, at the following rates per horsepower per year, unless 

 otherwise ordered by the Secretary : 



For the unexpired portion of the calendar year and for the first full 

 calendar year of the survey-construction period, and similarly for the 



operation period $0. 10 



For the second full calendar year of each of said periods . 20 



For the third year . 30 



For the fourth year .40 



For the fifth year . 50 



For the sixth year .60 



For the seventh year . 70 



For the eighth year . 80 



For the ninth year .90 



For the tenth and each succeeding year 1. 00 



The occupancy and use of National Forest lands by transmission 

 lines, except only where such lines are owned and operated by a 

 municipal corporation for municipal purposes, or are part of a power 

 project under permit, or are to be used temporarily in the construc- 

 tion of project works under permit issued to the same permittee, will 

 be conditioned on the payment in advance for each calendar year of 

 a rental charge of five dollars ($5) for each mile or fraction thereof, 

 unless otherwise ordered by the Secretary. 



The rental charges on account of a preliminary power permit will 

 be calculated from the rental capacity of the power site as estimated 

 by the Secretary at the time of granting such permit. The rental 

 charges on account of a final power permit will be calculated from the 

 rental capacity of the power site as estimated by the Secretary at 

 the time of granting said final permit, provided that said estimated 

 rental capacity may be adjusted by the Secretary (a) to provide for 

 changes made during construction, (&) annually to provide for 

 changes in ownership of lands in reservoir sites and on water-conduit 

 lines, and for changes in length of primary transmission, (c) to pro- 

 vide for changes in nominal stream flow whenever such flow is in- 

 creased or decreased because of additional storage or otherwise; or 

 (d) whenever not less than ten (10) years after the determination of 

 the last preceding estimated value thereof, the permittee shall apply 

 for or the Secretary give notice of a redetermination of the rental 

 capacity of the power site. 



The first payment by every permittee shall be the charge for a full 

 year, but any excess of said payment over the pro rata charge for the 



