[Code of Federal Regulations]
[Title 18, Volume 1]
[Revised as of April 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 18CFR11.13]

[Page 183]
 
           TITLE 18--CONSERVATION OF POWER AND WATER RESOURCES
 
  CHAPTER I--FEDERAL ENERGY REGULATORY COMMISSION, DEPARTMENT OF ENERGY
 
PART 11_ANNUAL CHARGES UNDER PART I OF THE FEDERAL POWER ACT--Table of Contents
 
                Subpart B_Charges for Headwater Benefits
 
Sec. 11.13  Energy gains calculations.

    (a) Energy gains at a downstream project. (1) Energy gains at a 
downstream project are determined by simulating operation of the 
downstream project with and without the effects of the headwater 
project. Except for determinations which are not complex or in which 
headwater benefits are expected to be small, calculations will be made 
by application of the Headwater Benefits Energy Gains Model, as 
presented in The Headwater Benefits Energy Gains (HWBEG) Model 
Description and Users Manual, which is available for the National 
Technical Information Service, U.S. Department of Commerce, 5285 Port 
Royal Road, Springfield, VA 22161.
    (2) If more than one headwater project provide energy gains to a 
downstream project, the energy gains at the dowstream project are 
attributed to the headwater projects according to the time sequence of 
commencement of operation in which each headwater project provided 
energy gains at the downstream project, by:
    (i) Crediting the headwater project that is first in time with the 
amount of energy gains that it provided to the downstream project prior 
to operation of the headwater project that is next in time; and
    (ii) Crediting any subsequent headwater project with the additional 
increment of energy gains provided by it to the downstream project.
    (3) Annual energy losses at a downstream project, or group of 
projects owned by the same entity, that are attributable to the 
headwater project will be subtracted from energy gains for the same 
annual period at the downstream project or group of projects. A net loss 
in one calendar year will be subtracted from net gains in subsequent 
years until no net loss remains.
    (b) Energy generated at the headwater project. (1) Except as 
provided in paragraphs (b)(2) and (b)(3) of this section, the portion of 
the total annual energy generation at the headwater project that is to 
be attributed to the joint-use power cost is derived by multiplying the 
total annual generation at the headwater project and the ratio of the 
project investment cost assigned to the joint-use power cost to the sum 
of the investment cost assigned to both the specific power cost and the 
joint-use power cost of the headwater project, as follows:
[GRAPHIC] [TIFF OMITTED] TC14NO91.112

In which:

Ej=annual energy generated at the headwater project to be 
attributed to the joint-use power cost,
E=total annual generation at the headwater project,
Cj=project investment costs assigned to the joint-use power 
cost, and
Cs=project investment costs assigned to specific power costs.

    (2) If the headwater project contains a pumped storage facility, 
calculation of the portion of the total annual energy generation at the 
headwater project that is attributable to the joint-use power cost will 
be determined on a case-by-case basis.
    (3) If no power is generated at the headwater project, the amount of 
energy attributable to the joint-use power cost under this section is 
the total of all downstream energy gains included in the headwater 
benefits formula.