Subject: October 2023 Most Probable 24-Month Study 

The operation of Lake Powell and Lake Mead in the October 2023 24-Month Study is pursuant to the December 2007 Record of DeInterim Guidelines for Lower Basin Shortages and the Coordinated Operations of Lake Powell and Lake Mead (Interim Guidelines) 

Operating Plan (AOP). Pursuant to the Interim Guidelines, the August 2022 24-Month Study projections of the January 1, 2023, sys

water surface elevations set the operational tier for the coordinated operation of Lake Powell and Lake Mead during 2023. Consistent with Section 2.D.1 of the Interim Guidelines, a Shortage Condition consistent with Section 2.D.1.b is governing the oper

year (CY) 2023. In addition, Section III.B of Exhibit 1 to the Lower Basin Drought Contingency Plan (DCP) Agreement will govern th

CY 2023. Efforts to conserve additional water in Lake Mead under a 2021 Lower Basin Memorandum of Understanding (MOU) to f

maintain the water surface elevation of Lake Mead and additional conservation efforts under the Lower Colorado River Basin SysteProgram (LC Conservation Program) will also take place in CY 2023. The August 2023 24-Month study projected the January 1, 2024, Lake Powell elevation to be less than 3,575 feet and at or above 3elevation to be at or above 1,025 feet. Consistent with Section 6.C.1 of the Interim Guidelines the operational tier for Lake Powell in the. Mid-Elevation Release Tier and the water year release volume from Lake Powell will be 7.48 million acre-feet (maf). The 2022 Drought Response Operations Agreement (DROA) Plan1 for May 2022 through April 2023 was amended to suspend 202

March 7, 2023. A total DROA release of approximately 463 thousand acre-feet (kaf) occurred under the 2022 DROA Plan. ReclamaDROA recovery in the Upper Initial Units in WY 2023 and through April 2024. Reclamation will provide monthly DROA accounting, 

recovery, which can be found online at: https://www.usbr.gov/dcp/DROSummarySheet.pdf. 

In May of 2023, the DROA Parties agreed to the 2023 DROA Plan. The 2023 DROA Plan does not include any DROA releases, bu

prior DROA releases from the units upstream of Powell. Reclamation will continue to carefully monitor hydrologic and operational conditions and assess the need for additional responsive operations. Reclamation will continue to consult with the Basin States, Basin Tribes, Mexico, and other partners on Colorado River 

determine whether additional measures should be taken to further enhance the preservation of these benefits, as well as recovery 

future protective measures for both Lakes Powell and Mead. 

1 For more information: https://www.usbr.gov/uc/DocLibrary/Plans/20220429-2022DroughtResponseOperationsPlan-ApprovalMemo-508-DOI.pdf. 

To: All Annual Operating Plan Recipients From: Noe Santos, P.E. 

 River Operations Manager 

Boulder Canyon Operations Office Interior Region 8: Lower Colorado Basin 

 Email: nsantos@usbr.gov 

From: Alex Pivarnik  Supervisor, River Operations Group 

Upper Colorado Operations Office Interior Region 7: Upper Colorado Basin 

 Email: apivarnik@usbr.gov 
Runoff and inflow projections into upper basin reservoirs are provided by the National Weather Service’s Colorado Basin River For

Reservoir Observed Inflow (kaf) Sep Inflow Forecast (kaf) O

Jun Jul Aug Sep %Avg Oct Nov Dec Apr-J

Lake Powell 3646 1054 307 224 65% 400 440 360 1061Fontenelle 412 141 74 51 127% 50 45 35 951 Flaming Gorge 574 174 95 67 146% 60 56 39 1457 Blue Mesa 312 117 49 26 74% 29 28 26 833 Morrow Point 331 121 49 27 73% 30 29 28 901 Crystal 357 128 52 29 70% 34 33 32 988 Taylor Park 50 22 8.8 5.5 79% 5.5 4.5 4.5 118 Vallecito 75 22 10.6 8.7 56% 7 6 5.5 252 Navajo 249 46 -3.14 0.41 1% 15 25 20 1028 Lemon 23 4.9 2.0 1.83 52% 1.4 1 0.9 67 McPhee 108 23 10 8.3 76% 5 4 4 527 Ridgway 41 28 11.2 5.6 63% 6 5.2 4.6 110 Deerlodge 516 77 19.3 10.8 69% 24 30 26 2002 Durango 178 75 23 11.0 61% 15 14 14.0 532 

The draft 2024 AOP is available online at: https://www.usbr.gov/lc/region/g4000/AOP2024/AOP24_draft.pdf

The 2023 AOP is available online at: https://www.usbr.gov/uc/water/rsvrs/ops/aop/AOP23.pdf. The Interim Guidelines are available online at: https://www.usbr.gov/lc/region/programs/strategies/RecordofDecision.pdf. The Colorado River DCPs are available online at: https://www.usbr.gov/dcp/finaldocs.html. The 2021 Lower Basin MOU is available online at: https://www.usbr.gov/lc/region/g4000/2021_MOU.pdf. The Upper Basin DROA is online at: https://www.usbr.gov/dcp/droa.html. The Upper Basin Hydrology Summary is available online at: https://www.usbr.gov/uc/water/crsp/studies/24Month_10_ucb.pdf. Information on the LC Conservation Program is available online at: https://www.usbr.gov/lc/LCBConservation.html. 
Most Probable Inflow*

October 2023 24-Month Study

Fontenelle Reservoir

OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS

Reservoir Elev

End of Month

(Ft)

Live

Storage

(1000 Ac-Ft)

Total

Release

(1000 Ac-Ft)

Regulated

Inflow

Date (1000 Ac-Ft)

Evap

Losses

(1000 Ac-Ft)

Power

Release

(1000 Ac-Ft)

Bypass

Release

(1000 Ac-Ft)

* Oct 2022 40 1 22 39 61 6494.58 249

H Nov 2022 33 1 10 48 58 6490.90 224

I Dec 2022 28 1 56 2 58 6486.14 194

S Jan 2023 32 1 58 0 59 6481.53 167

T Feb 2023 28 0 10 43 53 6476.59 141

O Mar 2023 29 0 55 3 58 6470.02 113

R Apr 2023 75 1 61 0 61 6473.29 126

I May 2023 323 1 102 95 198 6494.66 250

C Jun 2023 412 2 92 269 361 6501.41 299

A Jul 2023 141 3 86 41 127 6502.91 310

L Aug 2023 74 2 71 3 74 6502.60 308

* Sep 2023 51 2 70 1 71 6499.60 285

WY 2023 1266 15 693 545 1238

Oct 2023 50 1 68 0 68 6497.02 267

Nov 2023 45 1 68 0 68 6493.71 243

Dec 2023 35 1 71 0 71 6488.25 207

Jan 2024 32 1 71 0 71 6481.68 168

Feb 2024 30 0 66 0 66 6474.34 131

Mar 2024 48 0 68 0 68 6469.57 111

Apr 2024 75 1 35 20 55 6474.27 131

May 2024 150 1 98 0 98 6484.06 181

Jun 2024 295 2 103 91 194 6498.82 280

Jul 2024 165 3 102 19 121 6504.39 321

Aug 2024 60 2 92 0 92 6499.91 288

Sep 2024 40 2 70 0 70 6495.49 256

WY 2024 1025 15 910 130 1040

Oct 2024 46 1 0 55 55 6493.99 245

Nov 2024 42 1 0 61 61 6491.08 225

Dec 2024 32 1 20 48 68 6485.40 189

Jan 2025 31 1 68 0 68 6478.74 152

Feb 2025 29 0 61 0 61 6471.68 119

Mar 2025 51 0 55 0 55 6470.73 115

Apr 2025 77 1 38 10 48 6477.10 144

May 2025 166 1 92 0 92 6489.68 216

Jun 2025 301 2 105 122 227 6499.93 288

Jul 2025 146 3 102 12 114 6503.89 318

Aug 2025 59 2 77 0 77 6501.27 298

Sep 2025 39 2 65 0 65 6497.43 269

WY 2025 1019 15 682 309 990

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3236 Processed On: 10/10/2023 1:24:39PM 
Most Probable Inflow*

October 2023 24-Month Study

Flaming Gorge Reservoir

OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS

Reservoir Elev

End of Month

(Ft)

Live

Storage

(1000 Ac-Ft)

Total

Release

(1000 Ac-Ft)

Evap

Losses

Date (1000 Ac-Ft)

Bank

Storage

(1000 Ac-Ft)

Power

Release

(1000 Ac-Ft)

Unreg

Inflow

(1000 Ac-Ft)

Jensen

Flow

(1000 Ac-Ft)

Bypass

Release

(1000 Ac-Ft)

Reg

Inflow

(1000 Ac-Ft)

* Oct 2022 41 65 6 111 0 111 100 6011.45 2630 142

H Nov 2022 40 63 3 102 0 102 98 6010.19 2590 132

I Dec 2022 26 57 2 107 0 107 96 6008.59 2540 135

S Jan 2023 38 65 2 108 0 108 95 6007.19 2497 143

T Feb 2023 33 58 2 98 0 98 93 6005.89 2457 134

O Mar 2023 49 77 3 61 5 66 93 6006.15 2465 119

R Apr 2023 188 181 4 48 0 48 98 6010.17 2589 404

I May 2023 521 397 7 49 0 49 111 6020.21 2917 1044

C Jun 2023 574 512 10 114 42 157 125 6029.59 3249 673

A Jul 2023 174 166 13 75 1 76 128 6031.49 3323 168

L Aug 2023 95 93 13 112 0 112 126 6030.69 3292 146

* Sep 2023 67 88 11 114 0 114 125 6029.77 3256 135

WY 2023 1847 1821 74 1099 48 1147 3376

Oct 2023 60 78 7 105 0 105 124 6028.91 3223 129

Nov 2023 56 79 3 101 0 101 123 6028.24 3198 131

Dec 2023 39 75 2 123 0 123 121 6026.90 3150 149

Jan 2024 45 84 2 123 0 123 119 6025.79 3111 150

Feb 2024 49 85 2 115 0 115 118 6024.92 3080 142

Mar 2024 100 120 3 71 0 71 120 6026.16 3124 141

Apr 2024 125 105 5 69 0 69 121 6027.00 3154 284

May 2024 215 163 7 183 0 183 120 6026.26 3128 728

Jun 2024 395 294 10 233 0 233 122 6027.66 3177 618

Jul 2024 190 146 13 79 0 79 124 6029.05 3229 144

Aug 2024 70 102 12 106 0 106 123 6028.64 3213 124

Sep 2024 46 76 11 104 0 104 122 6027.61 3176 122

WY 2024 1390 1405 77 1412 0 1412 2862

Oct 2024 54 63 7 72 0 72 121 6027.20 3161 105

Nov 2024 51 70 3 64 0 64 121 6027.27 3164 98

Dec 2024 34 70 2 93 0 93 120 6026.60 3139 118

Jan 2025 42 79 2 93 0 93 120 6026.16 3124 118

Feb 2025 43 75 2 84 0 84 119 6025.87 3114 109

Mar 2025 85 89 3 61 0 61 120 6026.52 3137 135

Apr 2025 111 82 5 60 0 60 121 6027.00 3154 263

May 2025 239 165 7 201 0 201 119 6025.85 3113 714

Jun 2025 389 315 10 96 0 96 127 6031.26 3314 463

Jul 2025 161 129 14 76 0 76 129 6032.20 3351 136

Aug 2025 66 84 13 106 0 106 127 6031.34 3317 125

Sep 2025 43 69 11 104 0 104 126 6030.20 3273 117

WY 2025 1318 1289 79 1110 0 1110 2501

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3236 Processed On: 10/10/2023 1:24:39PM 
Most Probable Inflow*

October 2023 24-Month Study

Taylor Park Reservoir

OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS

Reservoir Elev

End of Month

(Ft)

Live

Storage

(1000 Ac-Ft)

Total

Release

(1000 Ac-Ft)

Regulated

Inflow

Date (1000 Ac-Ft)

* Oct 2022 6 6 9308.80 68

H Nov 2022 4 5 9308.13 67

I Dec 2022 5 5 9307.68 66

S Jan 2023 4 5 9307.08 65

T Feb 2023 4 5 9306.26 64

O Mar 2023 4 5 9305.50 63

R Apr 2023 7 9 9304.30 61

I May 2023 39 20 9316.35 80

C Jun 2023 50 28 9328.01 102

A Jul 2023 22 26 9326.25 99

L Aug 2023 9 21 9319.91 87

* Sep 2023 6 15 9314.22 77

WY 2023 159 151

Oct 2023 6 6 9314.13 77

Nov 2023 5 6 9313.56 76

Dec 2023 5 6 9312.87 75

Jan 2024 4 6 9311.56 72

Feb 2024 4 6 9310.60 71

Mar 2024 5 6 9309.88 70

Apr 2024 8 9 9309.24 69

May 2024 26 15 9315.91 80

Jun 2024 40 18 9327.75 102

Jul 2024 16 21 9325.20 97

Aug 2024 8 18 9319.87 87

Sep 2024 6 15 9314.75 78

WY 2024 133 132

Oct 2024 6 9 9312.96 75

Nov 2024 5 5 9312.93 75

Dec 2024 4 5 9312.17 73

Jan 2025 5 5 9312.05 73

Feb 2025 4 5 9311.56 72

Mar 2025 5 5 9311.43 72

Apr 2025 9 9 9311.43 72

May 2025 26 15 9317.92 83

Jun 2025 40 18 9329.50 105

Jul 2025 15 24 9324.94 96

Aug 2025 8 18 9319.59 86

Sep 2025 7 18 9313.26 75

WY 2025 134 137

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3236 Processed On: 10/10/2023 1:24:39PM 
Most Probable Inflow*

October 2023 24-Month Study

Blue Mesa Reservoir

OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS

Reservoir Elev

End of Month

(Ft)

Live

Storage

(1000 Ac-Ft)

Total

Release

(1000 Ac-Ft)

Regulated

Inflow

Date (1000 Ac-Ft)

Evap

Losses

(1000 Ac-Ft)

Power

Release

(1000 Ac-Ft)

Bypass

Release

(1000 Ac-Ft)

UnReg

Inflow

(1000 Ac-Ft)

* Oct 2022 32 32 0 0 58 58 7441.74 266

H Nov 2022 26 27 0 1 10 11 7444.87 282

I Dec 2022 24 25 0 6 10 17 7446.44 290

S Jan 2023 24 25 0 20 0 20 7447.43 295

T Feb 2023 20 21 0 20 0 20 7447.61 296

O Mar 2023 25 26 0 19 0 19 7448.79 303

R Apr 2023 77 79 1 23 0 23 7458.56 358

I May 2023 327 309 1 77 0 77 7491.44 589

C Jun 2023 312 290 1 106 6 131 7510.36 747

A Jul 2023 117 120 1 125 1 126 7509.50 739

L Aug 2023 49 61 1 105 0 105 7504.26 694

* Sep 2023 26 36 1 15 85 100 7496.50 629

WY 2023 1060 1052 8 517 170 706

Oct 2023 29 29 1 66 0 66 7491.80 592

Nov 2023 28 29 0 36 0 36 7490.86 584

Dec 2023 26 27 0 25 0 25 7491.14 587

Jan 2024 24 26 0 43 0 43 7488.94 569

Feb 2024 23 25 0 41 0 41 7486.77 553

Mar 2024 36 37 0 43 0 43 7485.94 546

Apr 2024 65 66 1 64 0 64 7486.07 547

May 2024 195 184 1 203 25 228 7480.04 502

Jun 2024 245 223 1 42 0 42 7502.89 682

Jul 2024 90 95 1 77 0 77 7504.79 698

Aug 2024 51 61 1 84 0 84 7501.89 674

Sep 2024 33 42 1 83 0 83 7496.76 632

WY 2024 845 844 8 809 25 834

Oct 2024 35 38 1 64 0 64 7493.52 605

Nov 2024 30 30 0 30 0 30 7493.44 605

Dec 2024 26 27 0 46 0 46 7491.01 586

Jan 2025 25 25 0 46 0 46 7488.29 564

Feb 2025 23 24 0 41 0 41 7485.98 547

Mar 2025 38 38 0 40 0 40 7485.71 545

Apr 2025 78 78 1 54 0 54 7488.69 568

May 2025 204 193 1 204 28 232 7483.43 527

Jun 2025 251 229 1 63 0 63 7504.01 692

Jul 2025 86 95 1 84 0 84 7505.19 702

Aug 2025 55 65 1 87 0 87 7502.40 678

Sep 2025 35 46 1 82 0 82 7497.92 641

WY 2025 886 889 8 843 28 871

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3236 Processed On: 10/10/2023 1:24:39PM 
Most Probable Inflow*

October 2023 24-Month Study

Morrow Point Reservoir

OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS

Reservoir Elev

End of Month

(Ft)

Total

Release

(1000 Ac-Ft)

Blue Mesa

Release

Date (1000 Ac-Ft)

Side

Inflow

(1000 Ac-Ft)

Power

Release

(1000 Ac-Ft)

Bypass

Release

(1000 Ac-Ft)

Unreg

Inflow

(1000 Ac-Ft)

Live

Storage

(1000 Ac-Ft)

Total

Inflow

(1000 Ac-Ft)

* Oct 2022 33 58 1 59 60 0 60 7156.10 114

H Nov 2022 27 11 1 12 21 0 21 7143.98 104

I Dec 2022 26 17 2 18 20 0 20 7141.82 103

S Jan 2023 26 20 2 21 20 0 20 7144.03 105

T Feb 2023 21 20 1 21 18 0 18 7148.07 108

O Mar 2023 26 19 2 21 19 0 19 7149.91 109

R Apr 2023 85 23 8 31 30 0 30 7151.54 110

I May 2023 364 77 37 114 112 0 112 7153.72 112

C Jun 2023 331 131 18 149 142 2 149 7153.53 112

A Jul 2023 121 126 4 130 130 0 130 7152.51 111

L Aug 2023 49 105 0 105 105 0 105 7152.17 111

* Sep 2023 27 100 1 100 102 0 102 7150.01 109

WY 2023 1136 706 76 782 780 2 787

Oct 2023 30 66 1 67 64 0 64 7153.73 112

Nov 2023 29 36 1 37 37 0 37 7153.73 112

Dec 2023 28 25 2 27 27 0 27 7153.73 112

Jan 2024 26 43 2 45 45 0 45 7153.73 112

Feb 2024 25 41 2 43 43 0 43 7153.73 112

Mar 2024 40 43 4 47 47 0 47 7153.73 112

Apr 2024 73 64 8 72 72 0 72 7153.73 112

May 2024 215 228 20 248 248 0 248 7153.73 112

Jun 2024 265 42 20 62 62 0 62 7153.72 112

Jul 2024 95 77 5 82 82 0 82 7153.73 112

Aug 2024 54 84 3 87 87 0 87 7153.73 112

Sep 2024 35 83 2 85 85 0 85 7153.73 112

WY 2024 915 834 70 904 900 0 900

Oct 2024 36 64 1 65 65 0 65 7153.73 112

Nov 2024 32 30 2 32 32 0 32 7153.73 112

Dec 2024 27 46 1 47 47 0 47 7153.73 112

Jan 2025 26 46 1 47 47 0 47 7153.73 112

Feb 2025 25 41 2 43 43 0 43 7153.73 112

Mar 2025 40 40 2 42 42 0 42 7153.73 112

Apr 2025 89 54 11 65 65 0 65 7153.73 112

May 2025 226 232 22 254 254 0 254 7153.73 112

Jun 2025 265 63 14 77 77 0 77 7153.72 112

Jul 2025 90 84 4 88 87 0 87 7153.73 112

Aug 2025 56 87 1 88 88 0 88 7153.73 112

Sep 2025 36 82 1 83 83 0 83 7153.73 112

WY 2025 948 871 62 933 932 0 932

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3236 Processed On: 10/10/2023 1:24:39PM 
Most Probable Inflow*

October 2023 24-Month Study

Crystal Reservoir

OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS

Reservoir Elev

End of Month

(Ft)

Live

Storage

(1000 Ac-Ft)

Total

Release

(1000 Ac-Ft)

Morrow

Release

Date (1000 Ac-Ft)

Total

Inflow

(1000 Ac-Ft)

Bypass

Release

(1000 Ac-Ft)

Below Tunnel

Flow

(1000 Ac-Ft)

Unreg

Inflow

(1000 Ac-Ft)

Tunnel

Flow

(1000 Ac-Ft)

Power

Release

(1000 Ac-Ft)

Side

Inflow

(1000 Ac-Ft)

* Oct 2022 36 60 3 63 53 10 63 6751.29 16 41 21

H Nov 2022 29 21 2 23 21 2 23 6752.92 17 0 21

I Dec 2022 28 20 2 22 22 0 22 6751.64 17 2 21

S Jan 2023 28 20 2 22 22 0 22 6751.37 16 2 21

T Feb 2023 23 18 2 20 4 16 20 6751.71 17 1 19

O Mar 2023 29 19 2 22 0 22 22 6751.16 16 2 21

R Apr 2023 97 30 12 42 20 21 41 6752.29 17 19 22

I May 2023 406 112 42 154 108 41 155 6751.26 16 48 111

C Jun 2023 357 149 26 176 119 34 174 6757.16 18 63 123

A Jul 2023 128 130 7 137 117 20 138 6752.61 17 67 76

L Aug 2023 52 105 3 108 108 0 108 6751.75 17 66 44

* Sep 2023 29 102 2 104 104 0 104 6752.00 17 63 42

WY 2023 1243 787 106 894 698 167 893 374 543

Oct 2023 34 64 4 68 52 16 68 6753.04 17 55 13

Nov 2023 33 37 4 41 41 0 41 6753.04 17 0 41

Dec 2023 32 27 4 31 31 0 31 6753.04 17 0 31

Jan 2024 30 45 4 49 49 0 49 6753.04 17 0 49

Feb 2024 28 43 3 46 46 0 46 6753.04 17 0 46

Mar 2024 47 47 7 54 54 0 54 6753.04 17 5 49

Apr 2024 83 72 10 82 82 0 82 6753.04 17 42 40

May 2024 245 248 30 278 134 144 278 6753.04 17 62 216

Jun 2024 300 62 35 97 97 0 97 6753.03 17 61 36

Jul 2024 105 82 10 92 92 0 92 6753.04 17 65 27

Aug 2024 59 87 5 92 92 0 92 6753.04 17 65 27

Sep 2024 39 85 4 89 89 0 89 6753.04 17 55 34

WY 2024 1035 900 120 1020 860 159 1019 410 609

Oct 2024 41 65 5 70 56 13 70 6753.04 17 55 15

Nov 2024 36 32 4 36 36 0 36 6753.04 17 0 36

Dec 2024 32 47 5 52 52 0 52 6753.04 17 0 52

Jan 2025 31 47 5 52 52 0 52 6753.04 17 0 52

Feb 2025 29 43 4 47 47 0 47 6753.04 17 0 47

Mar 2025 46 42 6 48 48 0 48 6753.04 17 5 43

Apr 2025 100 65 11 76 76 0 76 6753.04 17 42 34

May 2025 251 254 25 279 134 145 279 6753.04 17 62 217

Jun 2025 293 77 28 105 105 0 105 6753.03 17 61 44

Jul 2025 98 87 8 95 95 0 95 6753.04 17 65 30

Aug 2025 63 88 7 95 95 0 95 6753.04 17 65 30

Sep 2025 42 83 6 89 89 0 89 6753.04 17 55 34

WY 2025 1062 932 114 1046 887 158 1045 410 635

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3236 Processed On: 10/10/2023 1:24:39PM 
Most Probable Inflow*

October 2023 24-Month Study

Vallecito Reservoir

OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS

Reservoir Elev

End of Month

(Ft)

Live

Storage

(1000 Ac-Ft)

Total

Release

(1000 Ac-Ft)

Regulated

Inflow

Date (1000 Ac-Ft)

* Oct 2022 14 3 7635.84 56

H Nov 2022 7 0 7639.00 62

I Dec 2022 5 0 7641.15 67

S Jan 2023 5 0 7643.44 72

T Feb 2023 5 2 7644.74 75

O Mar 2023 7 36 7630.44 46

R Apr 2023 36 45 7625.05 36

I May 2023 119 64 7651.55 91

C Jun 2023 75 41 7664.54 124

A Jul 2023 22 37 7658.55 108

L Aug 2023 11 38 7647.43 81

* Sep 2023 9 32 7636.60 57

WY 2023 314 299

Oct 2023 7 17 7631.51 48

Nov 2023 6 2 7633.72 52

Dec 2023 6 2 7635.83 56

Jan 2024 5 2 7637.36 59

Feb 2024 5 2 7638.91 62

Mar 2024 6 2 7640.78 66

Apr 2024 18 2 7647.86 82

May 2024 65 31 7661.18 115

Jun 2024 61 54 7663.56 122

Jul 2024 18 41 7654.29 98

Aug 2024 12 38 7643.26 72

Sep 2024 11 29 7634.35 53

WY 2024 220 221

Oct 2024 10 16 7630.80 46

Nov 2024 8 2 7634.09 53

Dec 2024 7 2 7636.68 58

Jan 2025 6 2 7638.68 62

Feb 2025 5 2 7640.22 65

Mar 2025 10 2 7643.87 73

Apr 2025 23 2 7652.74 94

May 2025 68 42 7662.60 119

Jun 2025 62 62 7662.24 118

Jul 2025 21 42 7654.04 97

Aug 2025 15 38 7644.27 74

Sep 2025 16 30 7637.80 60

WY 2025 251 241

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3236 Processed On: 10/10/2023 1:24:39PM 
Most Probable Inflow*

October 2023 24-Month Study

Navajo Reservoir

OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS

Reservoir Elev

End of Month

(Ft)

Live

Storage

(1000 Ac-Ft)

Total

Release

(1000 Ac-Ft)

Azotea

Tunnel Div

Date (1000 Ac-Ft)

Reg

Inflow

(1000 Ac-Ft)

Evap

Losses

(1000 Ac-Ft)

NIIP

Diversion

(1000 Ac-Ft)

Mod Unreg

Inflow

(1000 Ac-Ft)

Farmington

Flow

(1000 Ac-Ft)

* Oct 2022 44 2 32 1 5 33 6019.84 865 51

H Nov 2022 23 0 16 1 0 19 6019.52 862 37

I Dec 2022 17 0 13 0 0 22 6018.45 852 37

S Jan 2023 20 0 15 0 0 20 6017.85 847 34

T Feb 2023 18 0 15 1 1 17 6017.38 843 31

O Mar 2023 71 0 98 1 3 18 6025.86 920 46

R Apr 2023 245 24 235 2 8 21 6045.83 1124 108

I May 2023 488 59 376 3 28 128 6063.70 1340 344

C Jun 2023 249 47 163 4 38 168 6060.10 1294 342

A Jul 2023 46 11 49 4 45 32 6057.46 1261 82

L Aug 2023 -4 1 23 3 42 42 6052.15 1196 45

* Sep 2023 1 0 24 3 25 46 6047.88 1147 47

WY 2023 1219 144 1058 24 195 564 1203

Oct 2023 15 0 25 2 9 29 6046.56 1132 44

Nov 2023 25 0 20 1 0 18 6046.71 1134 32

Dec 2023 20 0 16 1 0 18 6046.43 1130 32

Jan 2024 21 0 18 1 0 18 6046.32 1129 31

Feb 2024 29 1 25 1 0 17 6046.92 1136 30

Mar 2024 60 5 51 1 6 18 6049.13 1161 36

Apr 2024 115 14 85 2 21 18 6052.87 1205 58

May 2024 220 29 157 3 36 18 6060.91 1304 142

Jun 2024 175 23 145 4 52 18 6066.37 1376 153

Jul 2024 29 2 51 5 55 29 6063.50 1338 79

Aug 2024 25 2 49 4 46 32 6060.95 1305 62

Sep 2024 26 1 43 3 25 30 6059.85 1291 54

WY 2024 760 76 685 27 250 264 754

Oct 2024 31 2 36 2 9 19 6060.39 1297 41

Nov 2024 28 1 21 1 0 18 6060.55 1300 36

Dec 2024 24 0 19 1 0 18 6060.52 1299 33

Jan 2025 22 0 18 1 0 18 6060.41 1298 31

Feb 2025 29 1 25 1 0 17 6060.97 1305 29

Mar 2025 92 10 74 2 5 18 6064.68 1353 41

Apr 2025 147 18 107 3 21 18 6069.57 1419 69

May 2025 251 34 191 4 35 229 6063.84 1342 364

Jun 2025 187 25 163 4 51 193 6057.15 1257 337

Jul 2025 33 2 51 4 55 29 6054.13 1220 80

Aug 2025 24 1 45 3 47 33 6050.97 1182 62

Sep 2025 31 2 43 3 26 30 6049.70 1168 56

WY 2025 899 96 793 27 249 639 1178

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3236 Processed On: 10/10/2023 1:24:39PM 
Most Probable Inflow*

October 2023 24-Month Study

Lake Powell

OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS

Reservoir Elev

End of Month

(Ft)

Bank

Storage

(1000 Ac-Ft)

Total

Release

(1000 Ac-Ft)

Regulated

Inflow

Date (1000 Ac-Ft)

Evap

Losses

(1000 Ac-Ft)

Bypass

Release

(1000 Ac-Ft)

Lees

Ferry Gage

(1000 Ac-Ft)

Unreg

Inflow

(1000 Ac-Ft)

EOM

Storage

(1000 Ac-Ft)

PowerPlant

Release

(1000 Ac-Ft)

* Oct 2022 437 535 17 480 0 480 3529.92 4520 5832 494

H Nov 2022 349 394 17 498 0 498 3528.02 4511 5720 507

I Dec 2022 281 358 13 550 0 550 3524.75 4496 5531 560

S Jan 2023 361 424 4 500 0 501 3523.45 4490 5456 510

T Feb 2023 270 337 4 480 0 480 3521.04 4479 5320 493

O Mar 2023 573 552 6 486 0 486 3522.02 4484 5375 500

R Apr 2023 1399 1103 10 819 90 909 3524.99 4497 5544 929

I May 2023 4520 3634 15 1088 0 1088 3561.42 4685 7888 1107

C Jun 2023 3646 2916 31 1064 0 1064 3583.47 4820 9574 1082

A Jul 2023 1054 923 40 1149 0 1149 3580.42 4800 9328 1164

L Aug 2023 307 454 39 902 0 902 3574.71 4764 8878 908

* Sep 2023 224 414 35 474 0 474 3573.58 4757 8790 475

WY 2023 13421 12043 230 8491 90 8581 8730

Oct 2023 400 501 24 480 0 480 3573.54 4757 8788 496

Nov 2023 440 486 24 500 0 500 3573.10 4754 8753 505

Dec 2023 360 441 19 600 0 600 3570.94 4741 8589 603

Jan 2024 365 460 5 723 0 723 3567.62 4721 8340 727

Feb 2024 415 488 6 639 0 639 3565.66 4709 8195 650

Mar 2024 580 528 10 675 0 675 3563.67 4698 8050 689

Apr 2024 900 781 16 601 0 601 3565.75 4710 8202 618

May 2024 1950 1815 20 599 0 599 3580.19 4798 9310 620

Jun 2024 2450 2001 35 628 0 628 3595.02 4898 10549 645

Jul 2024 825 758 45 709 0 709 3595.07 4898 10553 724

Aug 2024 365 489 44 758 0 758 3591.73 4875 10263 772

Sep 2024 350 488 40 568 0 568 3590.42 4866 10152 584

WY 2024 9400 9237 286 7480 0 7480 7633

Oct 2024 447 491 27 643 0 643 3588.46 4853 9986 659

Nov 2024 466 470 26 642 0 642 3586.26 4838 9803 647

Dec 2024 361 435 21 715 0 715 3582.86 4816 9525 718

Jan 2025 350 419 6 857 0 857 3577.72 4783 9113 861

Feb 2025 397 445 6 745 13 758 3573.93 4759 8818 769

Mar 2025 614 534 10 801 0 801 3570.57 4739 8561 815

Apr 2025 920 755 16 713 0 713 3570.88 4740 8585 730

May 2025 2060 2097 21 710 0 710 3586.82 4842 9850 731

Jun 2025 2423 2024 36 745 0 745 3600.10 4934 11000 762

Jul 2025 711 677 46 842 0 842 3597.92 4918 10805 857

Aug 2025 371 500 45 900 0 900 3593.23 4885 10393 914

Sep 2025 316 450 40 674 0 674 3590.38 4866 10148 690

WY 2025 9436 9297 301 8987 13 9000 9153

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3236 Processed On: 10/10/2023 1:24:39PM 
Most Probable Inflow*

October 2023 24-Month Study

Hoover Dam - Lake Mead

OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS

Reservoir Elev

End of Month

(Ft)

Bank

Storage

(1000 Ac-Ft)

SNWP

Use

(1000 Ac-Ft)

Side Inflow

Glen to Hoover

Date (1000 Ac-Ft)

Evap

Losses

(1000 Ac-Ft)

Total

Release

(1000 Ac-Ft)

Total

Release

(1000 CFS)

Glen

Release

(1000 Ac-Ft)

EOM

Storage

(1000 Ac-Ft)

Downstream

Requirements

(1000 Ac-Ft)

* Oct 2022 480 94 46 418 6.8 16 434 482 1046.28 7417

H Nov 2022 498 18 40 713 12.0 8 714 467 1043.02 7187

I Dec 2022 550 63 32 438 7.1 8 439 475 1044.82 7313

S Jan 2023 501 103 22 412 6.7 7 413 485 1046.97 7466

T Feb 2023 480 46 21 494 8.9 8 493 485 1047.02 7469

O Mar 2023 486 226 23 754 12.3 11 749 481 1046.03 7399

R Apr 2023 909 243 31 831 14.0 12 830 498 1049.69 7661

I May 2023 1088 185 40 855 13.9 22 772 520 1054.28 7995

C Jun 2023 1064 62 50 886 14.9 23 874 530 1056.39 8152

A Jul 2023 1149 61 48 760 12.4 30 758 553 1061.02 8501

L Aug 2023 902 112 54 580 9.4 25 580 574 1065.35 8834

* Sep 2023 474 127 53 492 8.3 16 462 577 1065.82 8871

WY 2023 8581 1340 458 7633 187 7518

Oct 2023 480 77 50 494 8.0 16 494 576 1065.79 8868

Nov 2023 500 63 44 576 9.7 8 576 572 1065.01 8807

Dec 2023 600 72 36 389 6.3 8 389 587 1067.89 9033

Jan 2024 723 75 25 550 8.9 11 550 600 1070.42 9233

Feb 2024 639 71 23 612 10.6 8 612 604 1071.20 9295

Mar 2024 675 97 25 788 12.8 14 788 601 1070.54 9243

Apr 2024 601 60 34 1003 16.8 16 1003 577 1065.88 8875

May 2024 599 37 42 983 16.0 20 983 552 1060.89 8491

Jun 2024 628 22 50 893 15.0 28 893 532 1056.89 8189

Jul 2024 709 55 48 787 12.8 32 787 526 1055.58 8091

Aug 2024 758 86 52 750 12.2 34 750 526 1055.69 8099

Sep 2024 568 72 50 648 10.9 30 648 521 1054.57 8017

WY 2024 7480 786 480 8472 224 8472

Oct 2024 643 77 48 460 7.5 24 460 533 1056.94 8193

Nov 2024 642 63 42 586 9.9 14 586 536 1057.73 8252

Dec 2024 715 72 35 518 8.4 9 518 550 1060.53 8464

Jan 2025 857 75 24 566 9.2 10 566 570 1064.59 8775

Feb 2025 758 71 23 537 9.7 7 537 586 1067.73 9020

Mar 2025 801 97 25 881 14.3 13 881 585 1067.48 9000

Apr 2025 713 60 34 1006 16.9 15 1006 568 1064.09 8736

May 2025 710 37 42 986 16.0 19 986 550 1060.41 8454

Jun 2025 745 22 51 896 15.1 26 896 537 1057.85 8261

Jul 2025 842 55 48 791 12.9 30 791 539 1058.20 8287

Aug 2025 900 86 53 753 12.2 32 753 548 1060.04 8426

Sep 2025 674 72 52 651 10.9 28 651 549 1060.23 8441

WY 2025 9000 786 475 8632 227 8632

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3236 Processed On: 10/10/2023 1:24:39PM 
Most Probable Inflow*

October 2023 24-Month Study

Davis Dam - Lake Mohave

OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS

Reservoir Elev

End of Month

(Ft)

EOM

Storage

(1000 Ac-Ft)

Total

Release

(1000 Ac-Ft)

Side

Inflow

Date (1000 Ac-Ft)

Evap

Losses

(1000 Ac-Ft)

Power

Release

(1000 Ac-Ft)

Spill

Release

(1000 Ac-Ft)

Hoover

Release

(1000 Ac-Ft)

Total

Release

(1000 CFS)

* Oct 2022 418 -2 14 541 0 541 8.8 633.78 1454

H Nov 2022 713 -15 13 516 0 516 8.7 640.22 1623

I Dec 2022 438 4 13 436 0 436 7.1 639.97 1617

S Jan 2023 412 2 9 347 0 347 5.6 642.12 1675

T Feb 2023 494 -18 8 429 0 444 8.0 643.00 1699

O Mar 2023 754 -6 10 705 0 705 11.5 644.17 1731

R Apr 2023 831 -10 13 844 0 844 14.2 642.84 1694

I May 2023 855 -10 14 833 0 859 14.0 641.83 1667

C Jun 2023 886 -15 14 819 0 819 13.8 643.22 1705

A Jul 2023 760 -15 12 736 0 736 12.0 643.06 1700

L Aug 2023 580 -14 16 555 0 555 9.0 642.86 1695

* Sep 2023 492 -6 16 563 0 578 9.7 638.85 1587

WY 2023 7633 -107 152 7325 0 7381

Oct 2023 494 -11 14 544 0 544 8.8 636.00 1512

Nov 2023 576 -16 13 468 0 468 7.9 639.01 1591

Dec 2023 389 -2 13 348 0 348 5.7 640.01 1618

Jan 2024 550 -11 9 481 0 481 7.8 641.80 1666

Feb 2024 612 -13 8 592 0 592 10.3 641.80 1666

Mar 2024 788 -10 10 733 0 733 11.9 643.05 1700

Apr 2024 1003 -14 13 978 0 978 16.4 643.00 1699

May 2024 983 -13 14 955 0 955 15.5 643.00 1699

Jun 2024 893 -21 14 858 0 858 14.4 643.00 1699

Jul 2024 787 -21 12 781 0 781 12.7 642.00 1671

Aug 2024 750 -17 15 717 0 717 11.7 642.00 1671

Sep 2024 648 -6 16 679 0 679 11.4 640.01 1617

WY 2024 8472 -154 151 8135 0 8135

Oct 2024 460 -11 14 618 0 618 10.1 633.00 1434

Nov 2024 586 -16 13 506 0 506 8.5 635.00 1486

Dec 2024 518 -2 13 385 0 385 6.3 639.51 1604

Jan 2025 566 -11 9 485 0 485 7.9 641.80 1666

Feb 2025 537 -13 8 517 0 517 9.3 641.80 1666

Mar 2025 881 -10 10 826 0 826 13.4 643.05 1700

Apr 2025 1006 -14 13 981 0 981 16.5 643.00 1699

May 2025 986 -13 14 959 0 959 15.6 643.00 1699

Jun 2025 896 -21 14 861 0 861 14.5 643.00 1699

Jul 2025 791 -21 12 784 0 784 12.8 642.00 1671

Aug 2025 753 -17 15 721 0 721 11.7 642.00 1671

Sep 2025 651 -6 16 682 0 682 11.5 640.01 1617

WY 2025 8632 -154 151 8327 0 8327

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3236 Processed On: 10/10/2023 1:24:39PM 
Most Probable Inflow*

October 2023 24-Month Study

Parker Dam - Lake Havasu

OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS

Reservoir Elev

End of Month

(Ft)

EOM

Storage

(1000 Ac-Ft)

Total

Release

(1000 Ac-Ft)

Evap

Losses

Date (1000 Ac-Ft)

CAP

Diversion

(1000 Ac-Ft)

MWD

Diversion

(1000 Ac-Ft)

Flow To

Mexico

(1000 CFS)

Davis

Release

(1000 Ac-Ft)

Flow To

Mexico

(1000 Ac-Ft)

Total

Release

(1000 CFS)

Side

Inflow

(1000 Ac-Ft)

* Oct 2022 541 26 12 393 6.4 106 66 447.14 564 67 1.1

H Nov 2022 516 1 9 336 5.6 103 67 447.09 563 89 1.5

I Dec 2022 436 14 7 277 4.5 101 63 447.06 562 87 1.4

S Jan 2023 347 16 6 261 4.2 54 40 447.14 564 125 2.0

T Feb 2023 444 1 8 370 6.7 16 40 447.47 570 130 2.3

O Mar 2023 705 39 9 553 9.0 70 91 448.31 586 168 2.7

R Apr 2023 844 50 11 669 11.2 49 169 447.68 574 153 2.6

I May 2023 859 31 13 655 10.7 73 166 446.26 547 135 2.2

C Jun 2023 819 16 15 636 10.7 70 69 448.25 585 130 2.2

A Jul 2023 736 17 17 634 10.3 70 22 448.36 587 131 2.1

L Aug 2023 555 22 17 485 7.9 61 19 447.78 576 105 1.7

* Sep 2023 578 13 15 462 7.8 43 55 448.12 582 123 2.1

WY 2023 7381 248 139 5730 816 867 1443

Oct 2023 544 21 12 444 7.2 52 61 447.50 570 68 1.1

Nov 2023 468 14 9 351 5.9 68 58 447.00 561 85 1.4

Dec 2023 348 17 6 247 4.0 56 60 446.50 552 83 1.3

Jan 2024 481 7 6 313 5.1 87 76 446.50 552 138 2.2

Feb 2024 592 4 8 411 7.1 87 84 446.50 552 124 2.2

Mar 2024 733 2 9 608 9.9 9 97 446.70 555 147 2.4

Apr 2024 978 7 11 727 12.2 90 109 448.70 593 147 2.5

May 2024 955 4 13 734 11.9 86 115 448.70 593 110 1.8

Jun 2024 858 10 16 714 12.0 83 44 448.70 593 116 2.0

Jul 2024 781 17 17 686 11.2 86 11 448.00 580 123 2.0

Aug 2024 717 19 17 621 10.1 86 11 447.50 571 102 1.7

Sep 2024 679 12 15 533 9.0 83 50 447.50 570 99 1.7

WY 2024 8135 134 139 6388 872 776 1342

Oct 2024 618 21 12 482 7.8 86 52 447.50 571 89 1.4

Nov 2024 506 14 9 375 6.3 83 48 447.50 570 115 1.9

Dec 2024 385 17 7 270 4.4 86 54 446.50 552 110 1.8

Jan 2025 485 7 6 313 5.1 90 76 446.50 552 138 2.2

Feb 2025 517 4 8 411 7.4 12 84 446.50 552 124 2.2

Mar 2025 826 2 9 608 9.9 102 97 446.70 555 147 2.4

Apr 2025 981 7 11 726 12.2 93 109 448.70 593 147 2.5

May 2025 959 4 13 733 11.9 89 115 448.70 593 110 1.8

Jun 2025 861 10 16 714 12.0 86 44 448.70 593 116 2.0

Jul 2025 784 17 17 686 11.2 89 11 448.00 580 123 2.0

Aug 2025 721 19 17 621 10.1 89 11 447.50 571 102 1.7

Sep 2025 682 12 15 533 9.0 86 50 447.50 570 99 1.7

WY 2025 8327 134 139 6472 990 750 1420

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3236 Processed On: 10/10/2023 1:24:39PM 
Most Probable Inflow*

October 2023 24-Month Study

Hoover Dam - Lake Mead

OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS

Reservoir Elev

End of Month

(Ft)

Hoover

Gross Energy

MKWH

Hoover

Static Head

(Ft)

Power

Release

Date (1000 CFS)

Percent of 

Units

Available KWH/AF

Change In

Storage

(1000 Ac-Ft)

Power

Release

(1000 Ac-Ft)

EOM

Storage

(1000 Ac-Ft)

Hoover Gen

Capacity

MW

* Oct 2022 418 6.8 1046.28 7417 88 402.36 924.5 145.8 70 348.8

H Nov 2022 713 12.0 1043.02 7187 -230 395.39 948.8 254.6 72 357.1

I Dec 2022 438 7.1 1044.82 7313 126 403.20 975.8 152.9 72 348.9

S Jan 2023 412 6.7 1046.97 7466 152 403.66 866.6 143.8 64 348.8

T Feb 2023 494 8.9 1047.02 7469 4 399.03 810.5 175.9 60 356.5

O Mar 2023 754 12.3 1046.03 7399 -70 397.62 863.6 270.4 65 358.8

R Apr 2023 831 14.0 1049.69 7661 262 402.80 839.3 300.5 65 361.7

I May 2023 855 13.9 1054.28 7995 335 405.85 986.6 313.1 71 366.3

C Jun 2023 886 14.9 1056.39 8152 156 407.42 1080.0 326.9 78 369.0

A Jul 2023 760 12.4 1061.02 8501 349 413.93 1283.0 280.8 90 369.5

L Aug 2023 580 9.4 1065.35 8834 333 420.26 1308.1 212.8 90 366.9

* Sep 2023 492 8.3 1065.82 8871 37 419.70 1160.0 181.4 79 368.4

WY 2023 7632 2759.0

Oct 2023 494 8.0 1065.79 8868 -3 419.15 1037.5 186.8 71 377.8

Nov 2023 576 9.7 1065.01 8807 -60 419.28 948.0 216.7 66 376.2

Dec 2023 389 6.3 1067.89 9033 226 419.02 957.0 142.9 66 367.6

Jan 2024 550 8.9 1070.42 9233 200 420.24 1044.0 204.5 71 372.1

Feb 2024 612 10.6 1071.20 9295 62 422.19 921.1 231.9 62 378.7

Mar 2024 788 12.8 1070.54 9243 -52 420.47 1112.0 301.6 75 382.8

Apr 2024 1003 16.8 1065.88 8875 -368 415.52 1351.0 374.1 93 373.1

May 2024 983 16.0 1060.89 8491 -384 411.37 1242.0 367.5 88 374.0

Jun 2024 893 15.0 1056.89 8189 -302 405.62 1390.0 324.6 100 363.5

Jul 2024 787 12.8 1055.58 8091 -97 403.31 1399.4 285.8 100 362.9

Aug 2024 750 12.2 1055.69 8099 8 403.04 1399.4 270.5 100 360.8

Sep 2024 648 10.9 1054.57 8017 -83 403.19 1386.6 230.8 100 356.3

WY 2024 8472 3137.5

Oct 2024 460 7.5 1056.94 8193 176 410.31 830.0 169.9 60 369.1

Nov 2024 586 9.9 1057.73 8252 59 414.17 830.0 219.3 60 373.9

Dec 2024 518 8.4 1060.53 8464 212 413.48 895.0 194.7 63 375.8

Jan 2025 566 9.2 1064.59 8775 311 414.70 907.9 209.8 63 370.5

Feb 2025 537 9.7 1067.73 9020 245 418.22 821.5 202.9 56 377.6

Mar 2025 881 14.3 1067.48 9000 -20 416.03 1278.8 335.7 87 381.1

Apr 2025 1006 16.9 1064.09 8736 -264 413.80 1269.7 375.3 87 373.2

May 2025 986 16.0 1060.41 8454 -282 410.28 1251.5 361.7 87 366.9

Jun 2025 896 15.1 1057.85 8261 -194 407.21 1232.7 329.2 87 367.4

Jul 2025 791 12.9 1058.20 8287 26 405.08 1419.4 288.4 100 364.8

Aug 2025 753 12.2 1060.04 8426 140 406.50 1432.3 274.3 100 364.3

Sep 2025 651 10.9 1060.23 8441 14 408.15 1433.6 235.1 100 361.1

WY 2025 8632 3196.4

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3236 Processed On: 10/10/2023 1:24:39PM 
Most Probable Inflow*

October 2023 24-Month Study

Davis Dam - Lake Mohave

OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS

Reservoir Elev

End of Month

(Ft)

Davis

Gross Energy

MKWH

Davis

Static Head

(Ft)

Power

Release

Date (1000 CFS)

Percent of 

Units

Available KWH/AF

Change In

Storage

(1000 Ac-Ft)

Power

Release

(1000 Ac-Ft)

EOM

Storage

(1000 Ac-Ft)

Davis Gen

Capacity

MW

* Oct 2022 541 8.8 633.78 1454 -141 134.35 185.9 66.9 73 123.5

H Nov 2022 516 8.7 640.22 1623 169 141.13 154.7 62.5 61 121.1

I Dec 2022 436 7.1 639.97 1617 -7 140.89 159.6 53.9 63 123.5

S Jan 2023 347 5.6 642.12 1675 58 143.26 157.9 44.3 62 127.7

T Feb 2023 429 8.0 643.00 1699 24 141.81 185.8 56.7 73 132.3

O Mar 2023 705 11.5 644.17 1731 32 141.44 215.5 93.4 85 132.4

R Apr 2023 844 14.2 642.84 1694 -36 138.90 255.0 108.3 100 128.3

I May 2023 833 14.0 641.83 1667 -28 137.48 255.0 109.4 100 131.4

C Jun 2023 819 13.8 643.22 1705 38 141.71 249.9 103.9 98 126.9

A Jul 2023 736 12.0 643.06 1700 -4 143.75 250.1 94.0 98 127.6

L Aug 2023 555 9.0 642.86 1695 -5 143.43 255.0 71.5 100 128.7

* Sep 2023 563 9.7 638.85 1587 -108 139.25 204.0 73.6 80 130.8

WY 2023 7325 938.3

Oct 2023 544 8.8 636.00 1512 -75 136.05 189.2 66.7 74 122.6

Nov 2023 468 7.9 639.01 1591 79 136.57 154.7 57.6 61 123.0

Dec 2023 348 5.7 640.01 1618 27 139.59 156.3 43.7 61 125.8

Jan 2024 481 7.8 641.80 1666 49 139.98 172.7 60.7 68 126.1

Feb 2024 592 10.3 641.80 1666 0 139.82 204.0 74.6 80 126.0

Mar 2024 733 11.9 643.05 1700 34 139.81 210.6 92.3 83 126.0

Apr 2024 978 16.4 643.00 1699 -2 138.79 255.0 122.3 100 125.0

May 2024 955 15.5 643.00 1699 0 139.06 255.0 119.7 100 125.3

Jun 2024 858 14.4 643.00 1699 0 139.45 255.0 107.8 100 125.6

Jul 2024 781 12.7 642.00 1671 -27 139.58 255.0 98.2 100 125.7

Aug 2024 717 11.7 642.00 1671 0 139.48 255.0 90.2 100 125.7

Sep 2024 679 11.4 640.01 1617 -54 138.58 255.0 84.8 100 124.8

WY 2024 8135 1018.6

Oct 2024 618 10.1 633.00 1434 -183 134.63 227.0 75.0 89 121.3

Nov 2024 506 8.5 635.00 1486 51 132.77 159.8 60.6 63 119.6

Dec 2024 385 6.3 639.51 1604 118 137.04 154.7 47.6 61 123.5

Jan 2025 485 7.9 641.80 1666 62 139.71 156.3 61.0 61 125.9

Feb 2025 517 9.3 641.80 1666 0 140.23 156.6 65.3 61 126.3

Mar 2025 826 13.4 643.05 1700 34 139.23 194.1 103.7 76 125.4

Apr 2025 981 16.5 643.00 1699 -2 138.77 249.9 122.7 98 125.0

May 2025 959 15.6 643.00 1699 0 139.04 255.0 120.1 100 125.3

Jun 2025 861 14.5 643.00 1699 0 139.44 255.0 108.2 100 125.6

Jul 2025 784 12.8 642.00 1671 -27 139.56 255.0 98.6 100 125.7

Aug 2025 721 11.7 642.00 1671 0 139.46 255.0 90.6 100 125.6

Sep 2025 682 11.5 640.01 1617 -54 138.55 255.0 85.2 100 124.8

WY 2025 8327 1038.4

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3236 Processed On: 10/10/2023 1:24:39PM 
Most Probable Inflow*

October 2023 24-Month Study

Parker Dam - Lake Havasu

OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS

Reservoir Elev

End of Month

(Ft)

Parker

Gross Energy

MKWH

Parker

Static Head

(Ft)

Power

Release

Date (1000 CFS)

Percent of 

Units

Available KWH/AF

Change In

Storage

(1000 Ac-Ft)

Power

Release

(1000 Ac-Ft)

EOM

Storage

(1000 Ac-Ft)

Parker Gen

Capacity

MW

* Oct 2022 393 6.4 447.14 564 -15 81.28 91.9 27.2 77 69.1

H Nov 2022 336 5.6 447.09 563 -1 82.54 82.0 22.8 68 68.0

I Dec 2022 277 4.5 447.06 562 0 82.38 60.0 18.5 50 66.8

S Jan 2023 261 4.2 447.14 564 2 81.41 72.6 17.3 60 66.4

T Feb 2023 357 6.7 447.47 570 6 81.43 94.3 25.4 79 71.2

O Mar 2023 553 9.0 448.31 586 16 81.24 120.0 38.6 100 69.8

R Apr 2023 669 11.2 447.68 574 -12 79.27 120.0 46.4 100 69.4

I May 2023 655 10.7 446.26 547 -26 78.52 116.1 45.3 97 69.2

C Jun 2023 636 10.7 448.25 585 37 79.10 120.0 44.0 100 69.2

A Jul 2023 634 10.3 448.36 587 2 82.12 120.0 44.1 100 69.6

L Aug 2023 485 7.9 447.78 576 -11 81.56 120.0 33.5 100 69.1

* Sep 2023 449 7.8 448.12 582 7 81.96 120.0 32.1 100 71.7

WY 2023 5703 395.3

Oct 2023 444 7.2 447.50 570 -12 79.94 91.0 31.4 76 70.7

Nov 2023 351 5.9 447.00 561 -9 80.03 81.0 24.1 68 68.6

Dec 2023 247 4.0 446.50 552 -9 80.54 60.0 15.7 50 63.6

Jan 2024 313 5.1 446.50 552 0 79.71 73.5 20.9 61 66.8

Feb 2024 411 7.1 446.50 552 0 78.66 96.2 28.4 80 69.1

Mar 2024 608 9.9 446.70 555 4 77.53 120.0 41.7 100 68.6

Apr 2024 727 12.2 448.70 593 38 77.71 120.0 50.5 100 69.5

May 2024 734 11.9 448.70 593 0 78.82 120.0 51.5 100 70.2

Jun 2024 714 12.0 448.70 593 0 78.79 120.0 50.1 100 70.2

Jul 2024 686 11.2 448.00 580 -13 78.77 120.0 47.9 100 69.8

Aug 2024 621 10.1 447.50 571 -10 78.59 120.0 43.1 100 69.4

Sep 2024 533 9.0 447.50 570 0 78.83 120.0 36.9 100 69.3

WY 2024 6388 442.3

Oct 2024 482 7.8 447.50 571 0 79.34 90.0 33.8 75 70.1

Nov 2024 375 6.3 447.50 570 0 80.08 92.0 25.7 77 68.6

Dec 2024 270 4.4 446.50 552 -19 80.59 114.2 17.2 95 63.6

Jan 2025 313 5.1 446.50 552 0 79.71 94.8 20.9 79 66.8

Feb 2025 411 7.4 446.50 552 0 78.54 92.1 28.4 77 69.0

Mar 2025 608 9.9 446.70 555 4 77.53 120.0 41.7 100 68.6

Apr 2025 726 12.2 448.70 593 38 77.71 120.0 50.5 100 69.5

May 2025 733 11.9 448.70 593 0 78.82 120.0 51.5 100 70.2

Jun 2025 714 12.0 448.70 593 0 78.79 120.0 50.1 100 70.2

Jul 2025 686 11.2 448.00 580 -13 78.77 120.0 47.9 100 69.8

Aug 2025 621 10.1 447.50 571 -10 78.59 120.0 43.1 100 69.4

Sep 2025 533 9.0 447.50 570 0 78.83 120.0 36.9 100 69.3

WY 2025 6472 447.7

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3236 Processed On: 10/10/2023 1:24:39PM 
Most Probable Inflow*

October 2023 24-Month Study

Upper Basin Power

OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS

Fontenelle

Reservoir

1000 MWHR

Crystal

Reservoir

1000 MWHR

Glen

Canyon

Date 1000 MWHR

Flaming

Gorge

1000 MWHR

Blue 

Mesa

1000 MWHR

Morrow

Point

1000 MWHR 

* Oct 2022 175 42 0 21 10 2

H Nov 2022 181 38 0 6 2 1

I Dec 2022 199 40 1 6 2 4

S Jan 2023 182 41 4 5 2 4

T Feb 2023 172 37 5 6 0 1

O Mar 2023 173 23 4 6 0 3

Winter 2023 1083 220 15 49 16 15

R Apr 2023 291 17 5 9 3 4

I May 2023 412 18 21 40 20 7

C Jun 2023 439 43 32 50 22 8

A Jul 2023 483 29 38 45 22 8

L Aug 2023 374 44 31 37 21 6

* Sep 2023 194 44 4 35 20 6

Summer 2023 2195 194 131 215 109 39

Oct 2023 190 35 20 23 9 5

Nov 2023 197 34 11 13 7 5

Dec 2023 236 42 7 10 5 5

Jan 2024 282 41 13 16 9 5

Feb 2024 248 39 12 16 8 4

Mar 2024 261 24 13 17 9 4

Winter 2024 1414 215 75 95 47 27

Apr 2024 232 23 19 26 14 2

May 2024 236 62 59 89 23 6

Jun 2024 254 78 12 22 17 7

Jul 2024 292 27 24 30 16 8

Aug 2024 311 36 26 31 16 7

Sep 2024 232 35 25 31 15 5

Summer 2024 1557 261 164 229 101 35

Oct 2024 261 24 19 23 10 0

Nov 2024 261 22 9 12 6 0

Dec 2024 288 31 14 17 9 1

Jan 2025 343 31 14 17 9 4

Feb 2025 296 28 12 16 8 4

Mar 2025 316 21 12 15 8 3

Winter 2025 1765 158 79 100 51 12

Apr 2025 280 20 16 24 13 2

May 2025 284 68 59 92 23 6

Jun 2025 308 33 19 28 18 7

Jul 2025 352 26 26 31 16 8

Aug 2025 371 36 27 32 16 6

Sep 2025 276 35 25 30 15 5

Summer 2025 1870 217 171 236 103 34

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3236 Processed On: 10/10/2023 1:24:39PM
Most Probable Inflow*

October 2023 24-Month Study

Flood Control Criteria - Beginning of Month Conditions

OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS

Navajo

Date KAF

Flaming

Gorge

KAF

Blue

Mesa

KAF

Lake

Powell

KAF

Upper Basin

Total

KAF

Lake

Mead

KAF

Total

KAF

Flaming

Gorge

KAF

Blue

Mesa

KAF

Navajo

KAF

Lake

Powell

KAF

Tot or Max

Allow

KAF

Lake

Mead

KAF

Total

KAF

BOM Space

Required

KAF

Mead 

Sched Rel

KAF

Mead 

FC Rel

KAF

Sys

Cont

MAF

* * * * P R E D I C T E D S P A C E * * * * * * * * C R E D I T A B L E S P A C E * * * *

Oct 2023 469 195 501 14523 15689 18749 34438 469 195 501 1166 14523 18749 34438 3040 494 0 25.2

Nov 2023 521 233 516 14526 15796 18752 34548 521 233 516 1270 14526 18752 34548 3810 576 0 25.1

Dec 2023 569 240 514 14560 15884 18813 34697 569 240 514 1324 14560 18813 34697 4580 389 0 25.1

Jan 2024 654 238 517 14725 16134 18587 34721 654 238 517 1409 14725 18587 34721 5350 550 0 25.0

* * * * E F F E C T I V E S P A C E * * * *

Jan 2024 654 238 517 14725 16134 18587 34721 246 139 394 779 14725 18587 34091 5350 550 0 25.0

Feb 2024 732 255 519 14974 16480 18387 34867 324 158 395 877 14974 18387 34238 1500 612 0 24.8

Mar 2024 800 272 512 15118 16702 18325 35027 390 177 387 954 15118 18325 34397 1500 788 0 24.7

Apr 2024 776 278 487 15264 16805 18377 35182 361 184 355 900 15264 18377 34541 1500 1003 0 24.6

May 2024 726 277 443 15112 16558 18745 35303 305 183 288 776 15112 18745 34632 1500 983 0 25.4

Jun 2024 702 322 344 14004 15372 19129 34502 273 216 149 639 14004 19129 33772 1500 893 0 26.8

Jul 2024 554 142 272 12765 13733 19431 33164 111 13 22 145 12765 19431 32342 1500 787 0 26.7

* * * * C R E D I T A B L E S P A C E * * * *

Aug 2024 461 126 310 12761 13658 19529 33186 461 126 310 897 12761 19529 33186 1500 750 0 26.3

Sep 2024 510 151 343 13051 14055 19521 33575 510 151 343 1004 13051 19521 33575 2270 648 0 25.9

Oct 2024 579 193 357 13162 14291 19603 33895 579 193 357 1130 13162 19603 33895 3040 460 0 25.7

Nov 2024 604 219 350 13328 14502 19427 33929 604 219 350 1174 13328 19427 33929 3810 586 0 25.6

Dec 2024 622 220 348 13511 14701 19368 34069 622 220 348 1190 13511 19368 34069 4580 518 0 25.6

Jan 2025 682 239 349 13789 15059 19156 34215 682 239 349 1270 13789 19156 34215 5350 566 0 25.4

* * * * E F F E C T I V E S P A C E * * * *

Jan 2025 682 239 349 13789 15059 19156 34215 399 144 107 650 13789 19156 33596 5350 566 0 25.5

Feb 2025 735 260 350 14200 15545 18845 34391 450 166 107 723 14200 18845 33769 1500 537 0 25.3

Mar 2025 778 278 343 14496 15895 18600 34494 491 184 99 775 14496 18600 33870 1500 881 0 25.2

Apr 2025 758 280 295 14753 16086 18620 34706 468 186 44 698 14753 18620 34070 1500 1006 0 25.1

May 2025 713 257 229 14729 15928 18884 34812 416 162 -45 533 14729 18884 34146 1500 986 0 26.0

Jun 2025 681 297 306 13464 14748 19166 33914 378 190 -7 561 13464 19166 33190 1500 896 0 27.3

Jul 2025 409 133 391 12313 13247 19359 32606 85 3 23 110 12313 19359 31783 1500 791 0 27.2

* * * * C R E D I T A B L E S P A C E * * * *

Aug 2025 342 123 428 12509 13402 19333 32736 342 123 428 893 12509 19333 32736 1500 753 0 26.8

Sep 2025 396 146 466 12921 13929 19194 33122 396 146 466 1008 12921 19194 33122 2270 651 0 26.3

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3236 Processed On: 10/10/2023 1:24:39PM