[Code of Federal Regulations]
[Title 40, Volume 27]
[Revised as ofJuly 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR434.80]

[Page 291]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 434--COAL MINING POINT SOURCE CATEGORY BPT, BAT, BCT LIMITATIONS AND NEW SOURCE PERFORMANCE STANDARDS--Table of Contents
 
                 Subpart H--Western Alkaline Coal Mining
 
Sec. 434.80  Specialized definitions.

    Source: 67 FR 3407, Jan. 23, 2002, unless otherwise noted.


    (a) The term brushing and grubbing area means the area where woody 
plant materials that would interfere with soil salvage operations have 
been removed or incorporated into the soil that is being salvaged.
    (b) The term regraded area means the surface area of a coal mine 
that has been returned to required contour.
    (c) The term sediment means undissolved organic and inorganic 
material transported or deposited by water.
    (d) The term sediment yield means the sum of the soil losses from a 
surface minus deposition in macro-topographic depressions, at the toe of 
the hillslope, along field boundaries, or in terraces and channels 
sculpted into the hillslope.
    (e) The term topsoil stockpiling area means the area outside the 
mined-out area where topsoil is temporarily stored for use in 
reclamation, including containment berms.
    (f) The term western coal mining operation means a surface or 
underground coal mining operation located in the interior western United 
States, west of the 100th meridian west longitude, in an arid or 
semiarid environment with an average annual precipitation of 26.0 inches 
or less.