[Code of Federal Regulations]
[Title 25, Volume 1]
[Revised as of April 1, 2005]
From the U.S. Government Printing Office via GPO Access
[CITE: 25CFR215]

[Page 691]
 
                            TITLE 25--INDIANS
 
     CHAPTER I--BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR
 
PART 215_LEAD AND ZINC MINING OPERATIONS AND LEASES, QUAPAW AGENCY
--Table of Contents
 
Sec.  215.22  Operations.

    (a) All shafts shall be securely cribbed to a point at least 8 
inches above the immediate surrounding surface and cribbing shall be 
maintained in good condition during the life of the mining lease: 
Provided, however, That at any time shafts may be permanently sealed by 
a reinforced concrete slab after first obtaining the written approval of 
the duly authorized representative of the Department of the Interior. 
The slab shall be so placed as to prevent caving of the ground around 
the shaft collar.
    (b) All shafts, prior to the expiration, surrender, or upon 
cancellation of the mining lease or abandonment of the property, shall 
be permanently sealed so as to prevent the caving of the ground around 
the shaft collar: Provided, however, That this requirement may be waived 
after first obtaining the written consent of the duly authorized 
representative of the Department of the Interior.
    (c) All shaft entrances not permanently sealed shall be so fenced, 
boxed, or covered as to prevent persons or animals from falling into the 
mine when the shaft is not in actual use, and such fencing, boxing, or 
covering shall be maintained in good condition during the life of the 
mining lease.
    (d) All shafts where hoisting is done shall be boxed or fenced on 
three sides and the fourth side equipped with a gate which shall be kept 
closed when access to the shaft is not necessary.
    (e) All churn drill holes shall be securely plugged to the surface 
unless used for ventilation or other mining purposes, in which case they 
shall be cased or otherwise prevented from caving or becoming a hazard 
to persons or animals. If cased, the casing shall extend 4 feet above 
the collar of the hole.