Environmental Impact Statement (EIS) Database

EIS Details

EIS Title

Post-2026 Operational Guidelines and Strategies for Lake Powell and Lake Mead Final Environmental Impact Statement

EIS Number

20260089

Unique Identification Number

EISX-010-10-000-1784905264

Document Type

Final

Federal Register Date

07/31/2026

EIS Comment Due/ Review Period Date

Amended Notice Date

Amended Notice

Supplemental Information

Issuance of Notice of Intent to Prepare an EIS:

06/16/2023

EPA Comment Letter Date

State or Territory

CO - AZ - CA - NM - NV - UT - WY

Lead Agency

Bureau of Reclamation

Contact Name

KayLee Nelson

Contact Phone

702-293-8073

Rating (if Draft EIS)

As of October 2018, EPA discontinued the use of ratings for Draft EISs.





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EIS Document(s):

P26_FEIS_Exec Summary_508.pdf (80 pp, 6,356 K)

P26_FEIS_Cover-Abstract-Contents_Vol-I_508.pdf (16 pp, 2,697 K)

P26-FEIS_1_Ch1 PurposeNeed_508.pdf (34 pp, 3,853 K)

P26-FEIS_2_Ch2 Alternatives_508.pdf (28 pp, 1,120 K)

P26-FEIS_3_Ch3 AE-EC_508.pdf (228 pp, 7,211 K)

P26-FEIS_4_Ch4 ConsultCoord_508.pdf (6 pp, 252 K)

P26_FEIS_Cover-Contents_Vol-II_20260726_508.pdf (6 pp, 2,679 K)

P26-FEIS_Appendix_A_CRSSModelingAssumptions_WITH_ATTS_508.pdf (90 pp, 3,520 K)

P26-FEIS_Appendix_B_ModelingAssumptionsLakePowellLakeMead_508.pdf (70 pp, 1,652 K)

P26-FEIS_Appendix_C_ShortageAllocationModel_WITH_ATTACH_C_1_508.pdf (246 pp, 8,802 K)

P26-FEIS_Appendix_D SupplyDriven Sensitivity_508.pdf (8 pp, 545 K)

P26-FEIS_Appendix_E_DMDU Overview and Approach_508.pdf (14 pp, 395 K)

P26-FEIS_Appendix_F_ Hydrologic Uncertainty SuperEnsemble_508.pdf (20 pp, 1,755 K)

P26-FEIS_Appendix_G_Initial Conditions_508.pdf (10 pp, 776 K)

P26-FEIS_Appendix_H_UnusedTribalDemand_508.pdf (22 pp, 611 K)

P26-FEIS_Appendix_I_AlternateUpperBasinDemandScenarios_508.pdf (34 pp, 4,624 K)

P26-FEIS_Appendix_J_602a_Analysis_508.pdf (12 pp, 409 K)

P26-FEIS_Appendix_K Mexico Shortage Sensitivty Analysis_508.pdf (20 pp, 1,106 K)

P26-FEIS_Appendix_L_UpperBasinBaselineDemandSchedule_508.pdf (8 pp, 268 K)

P26-FEIS_Appendix_M_LowerBasinBaselineDemandSchedule_508.pdf (32 pp, 1,007 K)

P26-FEIS_Appendix_N_International Border Region_508.pdf (46 pp, 6,538 K)

P26-FEIS_Appendix_O PIP Appendix_508.pdf (10 pp, 634 K)

P26-FEIS_Appendix_P_TribalConsultationEfforts_508.pdf (20 pp, 1,669 K)

P26-FEIS_Appendix_Q_Federal Register Notices_508.pdf (18 pp, 3,682 K)

P26-FEIS_Appendix_R_ResponsetoPublicComments_508.pdf (60 pp, 703 K)

P26-FEIS_Appendix_S_Additional_Description_of_Alternatives_508.pdf (38 pp, 907 K)

P26-FEIS_Appendix_T_2YearAnalysis_WITH_ATTACHMENT_508.pdf (88 pp, 3,377 K)

P26_FEIS_Cover-Contents_Vol-III_508.pdf (4 pp, 2,633 K)

P26-FEIS_TA_03 (Hydro)_508.pdf (114 pp, 8,250 K)

P26-FEIS_TA_04 (Water Del)_508.pdf (110 pp, 5,815 K)

P26-FEIS_TA_08 (Aquatic)_508.pdf (206 pp, 7,967 K)

P26-FEIS_TA_09 (Vegetation)_508.pdf (94 pp, 3,808 K)

P26-FEIS_TA_13 (Tribal)_508.pdf (24 pp, 445 K)

P26-FEIS_TA_14 (Rec)_508.pdf (44 pp, 1,445 K)

P26-FEIS_TA_15 (Dams)_508.pdf (78 pp, 6,566 K)

P26-FEIS_TA_16 (Socioeconomics)_508.pdf (90 pp, 4,177 K)

P26-FEIS_TA_17 (Lands)_508.pdf (70 pp, 5,278 K)

P26-FEIS_TA_05 (GeoSedi)_508.pdf (38 pp, 2,771 K)

P26-FEIS_TA_06 (Water Qual)_508.pdf (48 pp, 2,745 K)

P26-FEIS_TA_07 (Air)_508.pdf (68 pp, 3,449 K)

P26-FEIS_TA_10 (Wildlife)_508.pdf (74 pp, 865 K)

P26-FEIS_TA_11_(Cultural)_508.pdf (70 pp, 2,350 K)

P26-FEIS_TA_12_(Paleo)_508.pdf (62 pp, 7,730 K)

P26-FEIS_TA_18 (ITAs)_508.pdf (44 pp, 6,386 K)

P26-FEIS_TA_19 (Visual)_508.pdf (28 pp, 1,689 K)

P26_FEIS_Cover-Contents_Vol-IV_508.pdf (4 pp, 2,526 K)

P26-FEIS_5_List of Preparers_508.pdf (8 pp, 237 K)

P26-FEIS_6_References_508.pdf (22 pp, 308 K)

P26-FEIS_7_Glossary_508.pdf (20 pp, 277 K)

P26-FEIS_8_Index_508.pdf (4 pp, 131 K)