Nothing contained in this chapter shall be construed to alter, amend, repeal, construe, interpret, modify, or be in conflict with the provisions of the Boulder Canyon Project Act () [ et seq.], the Boulder Canyon Project Adjustment Act () [ et seq.], the Colorado River Compact, the Upper Colorado River Basin Compact, the Rio Grande Compact of 1938, or the treaty with the United Mexican States (Treaty Series 994).45 Stat. 105743 U.S.C. 61754 Stat. 77443 U.S.C. 618