43 CFR § 3809.431 - When must I modify my plan of operations?

---
identifier: "/us/cfr/t43/s3809.431"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "43 CFR § 3809.431 - When must I modify my plan of operations?"
title_number: 43
title_name: "Public Lands: Interior"
section_number: "3809.431"
section_name: "When must I modify my plan of operations?"
chapter_name: "BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR"
subchapter_number: "C"
subchapter_name: "MINERALS MANAGEMENT (3000)"
part_number: "3800"
part_name: "MINING CLAIMS UNDER THE GENERAL MINING LAWS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "16 U.S.C. 3101  30 U.S.C. 22-42, 181  301-306, 351-359, and 601  31 U.S.C. 9701; 40 U.S.C. 471  42 U.S.C. 6508; 43 U.S.C. 1701  and Pub. L. No. 97-35, 95 Stat. 357."
regulatory_source: "45 FR 13974, Mar. 3, 1980, unless otherwise noted."
cfr_part: "3800"
---


# 3809.431 When must I modify my plan of operations?

You must modify your plan of operations when any of the following apply:

(a) Before making any changes to the operations described in your approved plan of operations;

(b) When BLM requires you to do so to prevent unnecessary or undue degradation; and

(c) Before final closure, to address impacts from unanticipated events or conditions or newly discovered circumstances or information, including the following:

(1) Development of acid or toxic drainage;

(2) Loss of surface springs or water supplies;

(3) The need for long-term water treatment and site maintenance;

(4) Repair of reclamation failures;

(5) Plans for assuring the adequacy of containment structures and the integrity of closed waste units;

(6) Providing for post-closure management; and (7) Eliminating hazards to public safety.