30 CFR § 800.14 - Determination of bond amount.
(a) The amount of the bond required for each bonded area shall:
(1) Be determined by the regulatory authority;
(3) Reflect the probable difficulty of reclamation, giving consideration to such factors as topography, geology, hydrology, and revegetation potential; and
(b) The amount of the bond shall be sufficient to assure the completion of the reclamation plan if the work has to be performed by the regulatory authority in the event of forfeiture, and in no case shall the total bond initially posted for the entire area under one permit be less than $10,000.
(c) An operator's financial responsibility under § 817.121(c) of this chapter for repairing material damage resulting from subsidence may be satisfied by the liability insurance policy required under § 800.60.