Subject: April 2024 Most Probable 24-Month Study

The operation of Lake Powell and Lake Mead in the April 2024 24-Month Study is pursuant to the December 2007 Record of Decision on Colorado River Interim

Guidelines for Lower Basin Shortages and the Coordinated Operations of Lake Powell and Lake Mead (Interim Guidelines) and reflects the draft 2024 Annual 

Operating Plan (AOP). Pursuant to the Interim Guidelines, the August 2023 24-Month Study projections of the January 1, 2024, system storage and reservoir

water surface elevations set the operational tier for the coordinated operation of Lake Powell and Lake Mead during 2024. 

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 3,525 feet and the Lake Mead

elevation 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 water year (WY) 2024 will be

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 2022 DROA Plan releases as of 

March 7, 2023. A total DROA release of approximately 463 thousand acre-feet (kaf) occurred under the 2022 DROA Plan. 

In May of 2023, the DROA Parties agreed to the 2023 DROA Plan which is in effect through April 2024. The 2023 DROA Plan does not include any DROA

releases, but rather provides for recovery of prior DROA releases from the units upstream of Powell.

As of February 28, 2024, Reclamation has recovered all DROA releases at Flaming Gorge and Blue Mesa Reservoirs. Monthly DROA accounting, including DROA 

releases and recovery, can be found online at: https://www.usbr.gov/ColoradoRiverBasin/documents/dcp/DROA/DROSummarySheet.pdf.

Reclamation will continue to carefully monitor hydrologic and operational conditions and assess the need for additional responsive actions and/or changes to

operations. Reclamation will continue to consult with the Basin States, Basin Tribes, Mexico, and other partners on Colorado River operations to consider and

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

future protective measures for both Lakes Powell and Mead. 

The August 2023 24-Month Study projected the January 1, 2024 Lake Mead elevation to be below 1,075 feet and above 1,050 feet. Consistent with Section 2.D.1 

of the Interim Guidelines, a Shortage Condition consistent with Section 2.D.1.a will govern the operation of Lake Mead for calendar year (CY) 2024. In addition, 

Section III.B of Exhibit 1 to the Lower Basin Drought Contingency Plan (DCP) Agreement will also govern the operation of Lake Mead for CY 2024. Lower Basin 

projections for Lake Mead take into consideration additional conservation efforts under the LC Conservation Program.

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 
The 2024 operational tier determinations for Lake Powell and Lake Mead will be documented in the 2024 AOP, which is currently in development.

Current runoff projections into Lake Powell are provided by the National Weather Service’s Colorado Basin River Forecast Center. The observed unregulated

inflow into Lake Powell for the month of March was 0.455 maf or 76% of the 30-year average from 1991 to 2020. The April 2024 unregulated inflow forecast for

Lake Powell is 0.700 maf or 78% of the 30-year average. The 2024 April through July unregulated inflow forecast for Lake Powell is 5.70 maf or 89% of average.

The WY 2024 unregulated inflow forecast for Lake Powell is 8.39 maf or 87% of average.

In this study, the CY 2024 diversion for Metropolitan Water District of Southern California (MWD) is projected to be 0.978 maf. The CY 2024 diversion for the

Central Arizona Project (CAP) is projected to be 0.862 maf. Consumptive use for Nevada above Hoover (SNWP Use) is projected to be 0.240 maf for CY 2024.

Due to changing Lake Mead elevations, Hoover’s generator capacity is adjusted based on estimated effective capacity and plant availability. The estimated

effective capacity is based on projected Lake Mead elevations. Unit capacity tests will be performed as the lake elevation changes. This study reflects these

changes in the projections.

Hoover, Davis, and Parker Dam historical gross energy figures come from Power, Operations, and Maintenance reports provided by the Lower Colorado Region’s

Power Office, Bureau of Reclamation, Boulder City, Nevada. Questions regarding these historical energy numbers can be directed to Rebecca Rogers at (702)

293-8091.
Runoff and inflow projections into upper basin reservoirs are provided by the National Weather Service’s Colorado Basin River Forecast Center and are as follows:

Reservoir Observed Inflow (kaf) Mar Inflow Forecast (kaf) Apr-Jul

Dec Jan Feb Mar %Avg Apr May Jun Apr-Jul %Avg

Lake Powell 324 283 345 455 76% 700 1800 2500 5700 89%

Fontenelle 35 29 34 50 88% 80 160 320 710 97%

Flaming Gorge 44 41 57 94 89% 140 250 400 960 99%

Blue Mesa 25 23 24 33 88% 60 200 255 600 94%

Morrow Point 26 25 25 35 86% 70 215 270 645 93%

Crystal 29 27 26 38 82% 80 240 295 710 92%

Taylor Park 4.8 4.6 3.7 4.1 89% 8 28 43 97 103%

Vallecito 3.5 3.7 3.8 5.3 58% 14 59 50 138 78%

Navajo 13.7 14.3 18.3 31 38% 75 195 135 420 67%

Lemon 0.55 0.56 0.57 0.88 54% 3 14 17 38 79%

McPhee 1.43 2.3 2.8 4.6 24% 40 90 55 200 78%

Ridgway 4 3.8 3.5 3.9 70% 6 21 34 75 82%

Deerlodge 16.1 16.7 18.3 56 74% 230 585 460 1350 113%

Durango 8.6 8.2 7.6 9.9 47% 23 120 115 300 78%

The draft 2024 AOP is available online at:

https://www.usbr.gov/lc/region/g4000/AOP2024/AOP24_draft.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/ColoradoRiverBasin/dcp/finaldocs.html. 

The Upper Basin DROA is online at:

https://www.usbr.gov/ColoradoRiverBasin/dcp/droa.html. 

The Upper Basin Hydrology Summary is available online at:

https://www.usbr.gov/uc/water/crsp/studies/24Month_04_ucb.pdf. 

Information on the LC Conservation Program is available online at: 

https://www.usbr.gov/lc/LCBConservation.html. 
Most Probable Inflow*

April 2024 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)

* Apr 2023 75 1 61 0 61 6473.29 126

H May 2023 323 1 102 95 198 6494.66 250

I Jun 2023 413 2 92 269 361 6501.41 299

S Jul 2023 141 3 86 41 127 6502.91 310

T Aug 2023 74 2 71 3 74 6502.60 308

O Sep 2023 50 2 70 1 71 6499.60 285

WY 2023 1265 15 693 545 1238

R Oct 2023 53 1 65 3 68 6497.41 269

I Nov 2023 45 1 68 0 68 6494.04 246

C Dec 2023 35 1 72 0 72 6488.41 208

A Jan 2024 29 1 72 0 72 6481.00 164

L Feb 2024 34 0 69 0 69 6473.50 127

* Mar 2024 50 0 74 0 74 6467.77 104

Apr 2024 80 1 12 41 53 6474.13 130

May 2024 160 1 92 0 92 6486.59 196

Jun 2024 320 2 104 120 224 6500.24 290

Jul 2024 150 3 102 26 128 6502.83 309

Aug 2024 55 2 90 0 90 6497.76 272

Sep 2024 45 2 70 0 70 6494.01 245

WY 2024 1056 15 890 190 1080

Oct 2024 50 1 0 61 61 6492.17 233

Nov 2024 44 1 0 62 62 6489.43 215

Dec 2024 32 1 20 45 65 6484.09 181

Jan 2025 31 1 65 0 65 6477.80 147

Feb 2025 29 0 58 0 58 6471.21 117

Mar 2025 51 0 51 0 51 6471.00 117

Apr 2025 77 1 38 14 52 6476.60 141

May 2025 166 1 92 0 92 6489.31 214

Jun 2025 301 2 104 135 239 6497.97 273

Jul 2025 146 3 94 0 94 6504.54 323

Aug 2025 59 2 69 0 69 6502.97 311

Sep 2025 39 2 54 0 54 6500.80 294

WY 2025 1025 15 645 317 961

Oct 2025 45 1 55 0 55 6499.24 283

Nov 2025 42 1 65 0 65 6495.89 259

Dec 2025 32 1 74 0 74 6489.66 216

Jan 2026 31 1 74 0 74 6482.58 173

Feb 2026 29 1 67 0 67 6475.12 134

Mar 2026 51 0 74 0 74 6469.69 111

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3250 Processed On: 4/9/2024 10:32:55AM 
Most Probable Inflow*

April 2024 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)

* Apr 2023 188 181 4 48 0 48 98 6010.17 2589 403

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

I Jun 2023 574 512 10 114 42 157 125 6029.59 3249 672

S Jul 2023 174 166 13 75 1 76 128 6031.49 3323 173

T Aug 2023 95 93 13 112 0 112 126 6030.69 3292 152

O Sep 2023 67 88 11 114 0 114 125 6029.77 3256 142

WY 2023 1847 1821 74 1099 48 1147 3391

R Oct 2023 69 84 7 100 0 100 124 6029.17 3233 137

I Nov 2023 64 85 4 89 0 89 124 6028.99 3226 126

C Dec 2023 44 81 2 131 0 131 122 6027.65 3177 164

A Jan 2024 41 85 2 131 0 131 120 6026.37 3131 165

L Feb 2024 57 94 2 117 0 117 119 6025.67 3107 160

* Mar 2024 94 119 3 65 0 65 121 6027.04 3155 141

Apr 2024 140 113 5 110 0 110 121 6027.00 3154 340

May 2024 250 182 7 210 0 210 120 6026.04 3120 795

Jun 2024 400 304 10 141 0 141 125 6030.04 3267 601

Jul 2024 170 148 14 70 0 70 128 6031.63 3329 145

Aug 2024 65 100 13 106 0 106 127 6031.19 3311 124

Sep 2024 50 75 11 104 0 104 126 6030.18 3272 119

WY 2024 1445 1471 80 1375 0 1375 3017

Oct 2024 58 69 7 75 0 75 125 6029.85 3259 104

Nov 2024 53 71 3 82 0 82 125 6029.47 3245 114

Dec 2024 34 67 2 126 0 126 122 6027.91 3186 151

Jan 2025 42 76 2 126 0 126 120 6026.52 3137 151

Feb 2025 43 72 2 95 19 113 119 6025.35 3095 138

Mar 2025 85 85 3 52 0 52 120 6026.19 3125 126

Apr 2025 111 86 5 51 0 51 121 6027.00 3154 254

May 2025 239 165 7 210 0 210 119 6025.58 3104 723

Jun 2025 389 327 10 141 0 141 126 6030.19 3272 508

Jul 2025 161 109 14 70 0 70 127 6030.83 3297 130

Aug 2025 66 76 13 106 0 106 125 6029.77 3256 125

Sep 2025 43 58 11 104 0 104 123 6028.31 3201 117

WY 2025 1324 1260 79 1237 19 1256 2641

Oct 2025 52 62 7 75 0 75 122 6027.77 3182 101

Nov 2025 50 73 3 76 0 76 122 6027.62 3176 106

Dec 2025 34 76 2 114 0 114 120 6026.56 3138 139

Jan 2026 42 85 2 114 0 114 119 6025.73 3109 139

Feb 2026 43 81 2 103 0 103 118 6025.07 3085 128

Mar 2026 85 108 3 65 0 65 120 6026.16 3124 139

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3250 Processed On: 4/9/2024 10:32:55AM 
Most Probable Inflow*

April 2024 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)

* Apr 2023 7 9 9304.30 61

H May 2023 39 20 9316.35 80

I Jun 2023 50 28 9328.01 102

S Jul 2023 22 26 9326.25 99

T Aug 2023 9 21 9319.91 87

O Sep 2023 6 15 9314.22 77

WY 2023 159 151

R Oct 2023 6 6 9314.04 77

I Nov 2023 5 6 9313.41 75

C Dec 2023 5 6 9312.49 74

A Jan 2024 5 6 9311.45 72

L Feb 2024 4 6 9310.41 71

* Mar 2024 5 6 9309.28 69

Apr 2024 6 13 9304.86 62

May 2024 14 13 9305.84 63

Jun 2024 24 20 9308.72 68

Jul 2024 24 21 9310.45 71

Aug 2024 20 21 9309.73 69

Sep 2024 18 21 9307.95 67

WY 2024 136 146

Oct 2024 9 8 9308.40 67

Nov 2024 5 7 9306.89 65

Dec 2024 5 5 9307.31 66

Jan 2025 5 5 9307.70 66

Feb 2025 5 5 9307.86 67

Mar 2025 5 7 9306.49 64

Apr 2025 9 10 9305.99 64

May 2025 15 11 9308.78 68

Jun 2025 18 17 9309.54 69

Jul 2025 24 18 9313.27 75

Aug 2025 18 20 9311.88 73

Sep 2025 18 22 9309.62 69

WY 2025 137 134

Oct 2025 9 9 9309.36 69

Nov 2025 5 7 9307.87 67

Dec 2025 5 5 9308.29 67

Jan 2026 5 5 9308.66 68

Feb 2026 5 5 9308.82 68

Mar 2026 5 7 9307.47 66

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3250 Processed On: 4/9/2024 10:32:55AM 
Most Probable Inflow*

April 2024 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)

* Apr 2023 77 79 1 23 0 23 7458.56 358

H May 2023 327 309 1 77 0 77 7491.44 589

I Jun 2023 312 290 1 106 6 131 7510.36 747

S Jul 2023 117 120 1 125 1 126 7509.50 739

T Aug 2023 49 61 1 105 0 105 7504.26 694

O Sep 2023 26 36 1 15 85 100 7496.50 629

WY 2023 1060 1052 8 517 170 706

R Oct 2023 30 30 1 30 33 63 7492.37 596

I Nov 2023 28 29 0 33 0 33 7491.85 592

C Dec 2023 25 26 0 40 0 40 7490.05 578

A Jan 2024 23 25 0 35 0 35 7488.79 568

L Feb 2024 24 25 0 32 0 32 7487.95 562

* Mar 2024 33 35 0 45 0 45 7486.57 551

Apr 2024 60 67 1 62 0 62 7487.14 555

May 2024 200 199 1 184 0 184 7488.94 569

Jun 2024 255 251 1 68 0 68 7510.84 751

Jul 2024 85 82 2 125 0 125 7505.79 707

Aug 2024 48 49 1 101 0 101 7499.52 654

Sep 2024 31 34 1 74 0 74 7494.46 613

WY 2024 842 852 9 827 33 860

Oct 2024 33 32 1 66 0 66 7490.18 579

Nov 2024 30 32 0 20 0 20 7491.77 592

Dec 2024 26 25 0 34 0 34 7490.67 583

Jan 2025 25 24 0 28 0 28 7490.21 579

Feb 2025 23 23 0 25 0 25 7489.95 577

Mar 2025 38 40 0 27 0 27 7491.55 590

Apr 2025 78 79 1 37 0 37 7496.73 631

May 2025 204 200 1 151 0 151 7502.45 679

Jun 2025 251 250 1 107 0 107 7518.54 820

Jul 2025 86 80 2 104 0 104 7515.71 794

Aug 2025 55 57 1 94 0 94 7511.52 757

Sep 2025 35 39 1 85 0 85 7506.06 709

WY 2025 884 881 9 776 0 776

Oct 2025 36 36 1 79 0 79 7500.92 666

Nov 2025 31 33 0 52 0 52 7498.59 647

Dec 2025 26 25 0 89 0 89 7490.61 582

Jan 2026 25 24 0 36 0 36 7489.06 570

Feb 2026 23 23 0 30 0 30 7488.08 563

Mar 2026 38 40 0 36 0 36 7488.61 567

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3250 Processed On: 4/9/2024 10:32:55AM 
Most Probable Inflow*

April 2024 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)

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

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

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

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

T Aug 2023 49 105 0 105 105 0 105 7152.17 111

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

WY 2023 1136 706 76 782 780 2 787

R Oct 2023 31 63 1 64 68 0 68 7144.23 105

I Nov 2023 29 33 1 33 33 0 33 7145.52 106

C Dec 2023 26 40 1 41 36 0 36 7152.78 111

A Jan 2024 25 35 1 36 36 0 36 7152.69 111

L Feb 2024 25 32 1 32 25 3 27 7159.02 116

* Mar 2024 35 45 2 47 55 0 56 7147.92 107

Apr 2024 70 62 10 72 67 0 67 7153.73 112

May 2024 215 184 15 199 198 0 198 7153.73 112

Jun 2024 270 68 15 83 83 0 83 7153.72 112

Jul 2024 90 125 5 130 129 0 129 7153.73 112

Aug 2024 50 101 2 103 103 0 103 7153.73 112

Sep 2024 33 74 2 76 76 0 76 7153.73 112

WY 2024 897 860 55 915 909 3 912

Oct 2024 35 66 2 68 68 0 68 7153.73 112

Nov 2024 31 20 1 21 21 0 21 7153.73 112

Dec 2024 27 34 1 35 35 0 35 7153.73 112

Jan 2025 26 28 1 29 29 0 29 7153.73 112

Feb 2025 25 25 2 27 27 0 27 7153.73 112

Mar 2025 40 27 2 29 29 0 29 7153.73 112

Apr 2025 89 37 11 48 47 0 47 7153.73 112

May 2025 226 151 22 173 173 0 173 7153.73 112

Jun 2025 265 107 14 121 121 0 121 7153.72 112

Jul 2025 90 104 4 108 108 0 108 7153.73 112

Aug 2025 56 94 1 95 94 0 94 7153.73 112

Sep 2025 36 85 1 86 86 0 86 7153.73 112

WY 2025 946 776 62 838 837 0 837

Oct 2025 37 79 1 80 80 0 80 7153.73 112

Nov 2025 32 52 1 53 53 0 53 7153.73 112

Dec 2025 27 89 1 90 90 0 90 7153.73 112

Jan 2026 26 36 1 37 37 0 37 7153.73 112

Feb 2026 25 30 2 32 32 0 32 7153.73 112

Mar 2026 40 36 2 38 38 0 38 7153.73 112

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3250 Processed On: 4/9/2024 10:32:55AM 
Most Probable Inflow*

April 2024 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)

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

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

I Jun 2023 357 149 26 176 119 34 174 6757.16 18 63 125

S Jul 2023 128 130 7 137 117 20 138 6752.61 17 67 77

T Aug 2023 52 105 3 108 108 0 108 6751.75 17 66 45

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

WY 2023 1243 787 106 894 698 167 893 374 547

R Oct 2023 32 68 1 69 32 39 70 6747.66 15 49 24

I Nov 2023 31 33 3 35 35 0 35 6747.08 15 14 18

C Dec 2023 29 36 3 39 38 0 38 6747.95 16 1 33

A Jan 2024 27 36 2 38 37 0 37 6751.96 17 0 32

L Feb 2024 26 27 2 29 35 0 36 6727.27 10 0 31

* Mar 2024 38 56 3 59 52 0 53 6752.01 17 12 35

Apr 2024 80 67 10 77 77 0 77 6753.04 17 42 35

May 2024 240 198 25 223 134 89 223 6753.04 17 62 161

Jun 2024 295 83 25 108 108 0 108 6753.03 17 61 47

Jul 2024 95 129 5 134 134 0 134 6753.04 17 65 69

Aug 2024 55 103 5 108 108 0 108 6753.04 17 65 43

Sep 2024 36 76 3 79 79 0 79 6753.04 17 55 24

WY 2024 984 912 87 999 869 129 998 427 551

Oct 2024 39 68 4 72 56 15 72 6753.04 17 55 17

Nov 2024 35 21 4 25 25 0 25 6753.04 17 0 25

Dec 2024 32 35 5 40 40 0 40 6753.04 17 0 40

Jan 2025 31 29 5 34 34 0 34 6753.04 17 0 34

Feb 2025 29 27 4 31 31 0 31 6753.04 17 0 31

Mar 2025 46 29 6 35 35 0 35 6753.04 17 5 30

Apr 2025 100 47 11 58 58 0 58 6753.04 17 42 16

May 2025 251 173 25 198 134 64 198 6753.04 17 62 136

Jun 2025 293 121 28 149 130 19 149 6753.03 17 61 88

Jul 2025 98 108 8 116 116 0 116 6753.04 17 65 51

Aug 2025 63 94 7 101 101 0 101 6753.04 17 65 36

Sep 2025 42 86 6 92 92 0 92 6753.04 17 55 37

WY 2025 1059 837 113 950 852 98 950 410 540

Oct 2025 43 80 6 86 60 26 86 6753.04 17 49 37

Nov 2025 37 53 5 58 58 0 58 6753.04 17 49 9

Dec 2025 32 90 5 95 95 0 95 6753.04 17 1 95

Jan 2026 31 37 5 42 42 0 42 6753.04 17 0 42

Feb 2026 29 32 4 36 36 0 36 6753.04 17 0 36

Mar 2026 46 38 6 44 44 0 44 6753.04 17 5 39

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3250 Processed On: 4/9/2024 10:32:55AM 
Most Probable Inflow*

April 2024 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)

* Apr 2023 36 45 7625.05 36

H May 2023 119 64 7651.55 91

I Jun 2023 75 41 7664.54 124

S Jul 2023 22 37 7658.55 108

T Aug 2023 11 38 7647.43 81

O Sep 2023 9 32 7636.60 57

WY 2023 314 299

R Oct 2023 6 9 7635.08 54

I Nov 2023 4 0 7636.68 57

C Dec 2023 4 0 7638.20 61

A Jan 2024 4 0 7639.77 64

L Feb 2024 4 1 7641.12 67

* Mar 2024 5 2 7642.74 70

Apr 2024 14 1 7648.09 83

May 2024 59 31 7659.14 110

Jun 2024 50 43 7661.70 117

Jul 2024 15 41 7651.07 90

Aug 2024 10 38 7638.65 62

Sep 2024 10 29 7628.36 42

WY 2024 184 196

Oct 2024 10 16 7624.33 36

Nov 2024 8 0 7628.91 43

Dec 2024 7 0 7632.54 50

Jan 2025 6 0 7635.41 55

Feb 2025 5 1 7637.37 59

Mar 2025 10 2 7641.31 67

Apr 2025 23 1 7650.55 89

May 2025 68 37 7662.59 119

Jun 2025 62 62 7662.23 118

Jul 2025 21 42 7654.03 97

Aug 2025 15 38 7644.25 74

Sep 2025 16 30 7637.79 60

WY 2025 251 230

Oct 2025 13 17 7635.61 55

Nov 2025 9 1 7639.28 63

Dec 2025 7 2 7641.80 68

Jan 2026 6 2 7643.79 73

Feb 2026 5 1 7645.34 76

Mar 2026 10 2 7648.89 85

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3250 Processed On: 4/9/2024 10:32:55AM 
Most Probable Inflow*

April 2024 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)

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

H May 2023 488 59 375 3 28 127 6063.70 1340 344

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

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

T Aug 2023 -3 1 23 3 42 42 6052.15 1196 45

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

WY 2023 1219 144 1059 24 195 565 1203

R Oct 2023 12 0 16 2 7 32 6045.70 1122 39

I Nov 2023 12 0 9 1 0 21 6044.53 1109 34

C Dec 2023 14 0 10 1 0 21 6043.54 1098 34

A Jan 2024 14 0 11 1 0 21 6042.57 1088 34

L Feb 2024 18 0 15 1 2 22 6041.71 1079 34

* Mar 2024 31 1 26 1 5 23 6041.36 1075 37

Apr 2024 75 8 55 2 19 27 6041.99 1082 50

May 2024 195 26 142 3 31 22 6049.67 1167 142

Jun 2024 135 17 111 4 45 21 6053.15 1208 136

Jul 2024 15 0 41 4 49 47 6048.18 1150 89

Aug 2024 15 1 42 3 41 39 6044.56 1110 63

Sep 2024 28 1 46 2 22 30 6043.78 1101 50

WY 2024 564 53 524 24 221 324 741

Oct 2024 33 2 38 2 8 22 6044.43 1108 41

Nov 2024 29 1 21 1 0 27 6043.77 1101 44

Dec 2024 24 0 17 1 0 25 6042.96 1092 40

Jan 2025 22 0 16 1 0 22 6042.43 1086 35

Feb 2025 29 1 24 1 0 19 6042.78 1090 31

Mar 2025 92 10 73 1 5 22 6046.88 1135 45

Apr 2025 147 18 107 2 21 21 6052.35 1199 72

May 2025 251 34 186 3 35 22 6062.47 1324 157

Jun 2025 187 25 163 4 51 21 6068.94 1411 165

Jul 2025 33 2 51 5 55 29 6066.15 1373 80

Aug 2025 24 1 45 4 47 33 6063.29 1335 62

Sep 2025 31 2 43 3 26 30 6062.13 1320 56

WY 2025 902 96 785 27 248 291 826

Oct 2025 35 2 38 2 9 22 6062.53 1325 45

Nov 2025 30 1 22 1 0 21 6062.50 1325 39

Dec 2025 24 0 18 1 0 22 6062.21 1321 37

Jan 2026 22 0 17 1 0 22 6061.85 1316 35

Feb 2026 29 1 24 1 0 19 6062.16 1320 31

Mar 2026 92 10 73 2 5 22 6065.58 1365 45

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3250 Processed On: 4/9/2024 10:32:55AM 
Most Probable Inflow*

April 2024 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)

* Apr 2023 1399 1103 10 819 90 909 3524.99 4533 5544 929

H May 2023 4520 3634 15 1088 0 1088 3561.42 4720 7888 1107

I Jun 2023 3646 2916 31 1064 0 1064 3583.47 4855 9574 1082

S Jul 2023 1054 923 40 1149 0 1149 3580.42 4836 9328 1164

T Aug 2023 307 454 39 902 0 902 3574.71 4800 8878 908

O Sep 2023 224 414 35 474 0 474 3573.58 4793 8790 475

WY 2023 13421 12043 230 8491 90 8581 8730

R Oct 2023 324 432 24 480 0 480 3572.71 4787 8724 480

I Nov 2023 380 418 23 500 0 500 3571.43 4780 8626 509

C Dec 2023 324 418 18 600 0 600 3568.97 4765 8441 611

A Jan 2024 283 402 5 723 0 723 3564.88 4740 8138 732

L Feb 2024 345 423 6 636 0 636 3562.08 4724 7935 648

* Mar 2024 455 449 9 674 1 675 3559.02 4707 7717 686

Apr 2024 700 645 15 601 0 601 3559.41 4709 7745 615

May 2024 1800 1627 18 599 0 599 3572.14 4784 8680 619

Jun 2024 2500 2002 33 628 0 628 3587.69 4883 9922 645

Jul 2024 700 720 42 709 0 709 3587.34 4881 9893 724

Aug 2024 300 458 41 760 0 760 3583.49 4856 9576 772

Sep 2024 280 402 37 568 0 568 3581.17 4841 9388 580

WY 2024 8391 8398 272 7479 1 7480 7622

Oct 2024 385 433 26 480 0 480 3580.34 4835 9321 491

Nov 2024 433 451 25 500 0 500 3579.48 4830 9252 505

Dec 2024 361 462 20 600 0 600 3577.63 4818 9106 605

Jan 2025 350 436 6 723 0 723 3574.16 4796 8835 729

Feb 2025 397 461 6 639 0 639 3571.93 4783 8665 648

Mar 2025 614 515 10 675 0 675 3569.85 4770 8507 684

Apr 2025 920 731 16 601 0 601 3571.24 4778 8612 615

May 2025 2060 1819 21 599 0 599 3585.27 4867 9722 619

Jun 2025 2423 1941 36 628 0 628 3599.03 4962 10904 645

Jul 2025 711 691 46 709 0 709 3598.37 4957 10845 724

Aug 2025 371 506 45 758 0 758 3595.26 4935 10570 771

Sep 2025 316 453 41 568 0 568 3593.60 4923 10426 580

WY 2025 9341 8897 297 7480 0 7480 7617

Oct 2025 417 481 28 643 0 643 3591.56 4909 10249 654

Nov 2025 450 489 27 642 0 642 3589.61 4896 10083 647

Dec 2025 361 502 21 715 0 715 3587.01 4879 9866 720

Jan 2026 350 433 6 857 0 857 3582.15 4847 9467 863

Feb 2026 397 455 6 758 0 758 3578.57 4824 9181 767

Mar 2026 614 536 11 801 0 801 3575.33 4804 8926 810

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3250 Processed On: 4/9/2024 10:32:55AM 
Most Probable Inflow*

April 2024 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)

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

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

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

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

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

O Sep 2023 474 126 53 492 8.3 16 462 577 1065.82 8871

WY 2023 8581 1339 458 7633 187 7518

R Oct 2023 480 31 50 487 7.9 14 520 574 1065.34 8833

I Nov 2023 500 41 44 533 9.0 8 532 571 1064.81 8792

C Dec 2023 600 74 36 362 5.9 6 360 588 1068.05 9045

A Jan 2024 723 67 25 368 6.0 6 359 612 1072.67 9413

L Feb 2024 636 87 24 362 6.3 6 361 632 1076.52 9725

* Mar 2024 675 59 26 799 13.0 11 791 626 1075.35 9629

Apr 2024 601 101 35 924 15.5 19 924 609 1072.13 9369

May 2024 599 69 43 1085 17.7 28 1085 579 1066.33 8911

Jun 2024 628 28 52 909 15.3 34 909 559 1062.22 8592

Jul 2024 709 48 49 806 13.1 36 806 550 1060.58 8467

Aug 2024 760 96 53 732 11.9 31 732 553 1061.06 8504

Sep 2024 568 81 52 633 10.6 27 633 549 1060.29 8445

WY 2024 7480 782 488 8001 227 8013

Oct 2024 480 61 49 461 7.5 20 461 550 1060.42 8455

Nov 2024 500 57 43 602 10.1 11 602 544 1059.19 8362

Dec 2024 600 76 35 633 10.3 11 633 543 1059.16 8360

Jan 2025 723 81 24 516 8.4 10 516 559 1062.30 8598

Feb 2025 639 69 22 567 10.2 9 567 566 1063.64 8701

Mar 2025 675 129 24 825 13.4 15 825 562 1062.89 8643

Apr 2025 601 101 33 1027 17.3 15 1027 539 1058.28 8293

May 2025 599 69 40 1006 16.4 21 1006 515 1053.24 7918

Jun 2025 628 28 49 878 14.8 25 878 497 1049.42 7641

Jul 2025 709 48 46 775 12.6 27 775 491 1048.24 7556

Aug 2025 758 96 50 714 11.6 23 714 495 1049.11 7619

Sep 2025 568 81 49 616 10.3 20 616 493 1048.64 7585

WY 2025 7480 896 464 8619 209 8619

Oct 2025 643 61 46 456 7.4 16 456 504 1051.06 7760

Nov 2025 642 57 41 573 9.6 10 573 509 1052.04 7831

Dec 2025 715 76 34 520 8.5 10 520 523 1054.95 8045

Jan 2026 857 81 24 531 8.6 13 531 545 1059.59 8392

Feb 2026 758 69 22 583 10.5 12 583 558 1062.17 8589

Mar 2026 801 129 24 859 14.0 20 859 560 1062.50 8614

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3250 Processed On: 4/9/2024 10:32:55AM 
Most Probable Inflow*

April 2024 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)

* Apr 2023 831 -11 13 844 0 844 14.2 642.84 1694

H May 2023 855 -10 14 859 0 859 14.0 641.83 1667

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

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

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

O Sep 2023 492 -7 16 563 0 578 9.7 638.85 1587

WY 2023 7633 -108 152 7365 0 7381

R Oct 2023 487 -1 14 547 0 547 8.9 635.96 1511

I Nov 2023 533 -18 13 397 0 397 6.7 639.94 1616

C Dec 2023 362 -5 13 334 0 334 5.4 640.34 1627

A Jan 2024 368 -2 9 314 0 314 5.1 641.95 1670

L Feb 2024 362 0 8 350 0 350 6.1 642.15 1675

* Mar 2024 799 -2 10 779 0 779 12.7 642.41 1682

Apr 2024 924 -14 13 881 0 881 14.8 643.00 1699

May 2024 1085 -11 14 1060 0 1060 17.2 643.00 1699

Jun 2024 909 -17 14 878 0 878 14.8 643.00 1699

Jul 2024 806 -20 12 800 0 800 13.0 642.00 1671

Aug 2024 732 -15 15 701 0 701 11.4 642.00 1671

Sep 2024 633 -5 16 666 0 666 11.2 640.01 1617

WY 2024 8001 -112 151 7706 0 7706

Oct 2024 461 -9 14 621 0 621 10.1 633.00 1434

Nov 2024 602 -14 13 524 0 524 8.8 635.00 1486

Dec 2024 633 0 13 501 0 501 8.2 639.51 1604

Jan 2025 516 -11 9 434 0 434 7.1 641.80 1666

Feb 2025 567 -15 8 544 0 544 9.8 641.80 1666

Mar 2025 825 -11 10 770 0 770 12.5 643.05 1700

Apr 2025 1027 -14 13 1001 0 1001 16.8 643.00 1699

May 2025 1006 -11 14 980 0 980 15.9 643.00 1699

Jun 2025 878 -17 14 847 0 847 14.2 643.00 1699

Jul 2025 775 -20 12 769 0 769 12.5 642.00 1671

Aug 2025 714 -15 15 683 0 683 11.1 642.00 1671

Sep 2025 616 -5 16 648 0 648 10.9 640.01 1617

WY 2025 8619 -144 151 8323 0 8323

Oct 2025 456 -9 14 616 0 616 10.0 633.00 1434

Nov 2025 573 -14 13 495 0 495 8.3 635.00 1486

Dec 2025 520 0 13 389 0 389 6.3 639.51 1604

Jan 2026 531 -11 9 450 0 450 7.3 641.80 1666

Feb 2026 583 -15 8 560 0 560 10.1 641.80 1666

Mar 2026 859 -11 10 804 0 804 13.1 643.05 1700

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3250 Processed On: 4/9/2024 10:32:55AM 
Most Probable Inflow*

April 2024 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)

* Apr 2023 844 51 11 669 11.2 49 169 447.68 574 153 2.6

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

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

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

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

O 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

R Oct 2023 547 17 12 439 7.1 44 69 447.74 575 68 1.1

I Nov 2023 397 22 9 294 4.9 59 50 447.87 578 86 1.4

C Dec 2023 334 14 7 253 4.1 58 27 447.81 576 84 1.4

A Jan 2024 314 8 6 197 3.2 57 48 448.40 588 110 1.8

L Feb 2024 350 -1 8 264 4.6 42 58 446.99 561 88 1.5

* Mar 2024 779 -3 9 603 9.8 13 136 447.53 571 153 2.5

Apr 2024 881 18 11 632 10.6 83 165 447.50 570 145 2.4

May 2024 1060 8 13 756 12.3 99 170 448.50 589 129 2.1

Jun 2024 878 12 16 710 11.9 92 57 448.70 593 132 2.2

Jul 2024 800 16 17 681 11.1 100 21 448.00 580 134 2.2

Aug 2024 701 19 17 583 9.5 100 20 447.50 571 109 1.8

Sep 2024 666 12 15 495 8.3 92 67 447.50 570 98 1.6

WY 2024 7706 142 140 5907 838 888 1335

Oct 2024 621 20 12 456 7.4 99 66 447.50 571 83 1.4

Nov 2024 524 16 9 404 6.8 97 24 447.50 570 100 1.7

Dec 2024 501 15 7 389 6.3 104 30 446.50 552 161 2.6

Jan 2025 434 9 6 320 5.2 72 40 446.50 552 138 2.2

Feb 2025 544 4 8 421 7.6 68 45 446.50 552 124 2.2

Mar 2025 770 11 9 621 10.1 22 117 446.70 555 147 2.4

Apr 2025 1001 18 11 724 12.2 86 150 448.70 593 147 2.5

May 2025 980 8 13 730 11.9 84 150 448.70 593 110 1.8

Jun 2025 847 12 16 691 11.6 91 51 448.70 593 116 2.0

Jul 2025 769 16 17 658 10.7 94 18 448.00 580 123 2.0

Aug 2025 683 19 17 571 9.3 94 20 447.50 571 102 1.7

Sep 2025 648 12 15 486 8.2 91 59 447.50 570 99 1.7

WY 2025 8323 160 139 6470 1003 771 1450

Oct 2025 616 20 12 454 7.4 84 78 447.50 571 89 1.4

Nov 2025 495 16 9 368 6.2 81 47 447.50 570 115 1.9

Dec 2025 389 15 7 291 4.7 83 38 446.50 552 110 1.8

Jan 2026 450 9 6 324 5.3 72 51 446.50 552 138 2.2

Feb 2026 560 4 8 425 7.7 68 57 446.50 552 124 2.2

Mar 2026 804 11 9 625 10.2 20 148 446.70 555 147 2.4

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3250 Processed On: 4/9/2024 10:32:55AM 
Most Probable Inflow*

April 2024 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

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

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

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

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

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

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

WY 2023 7632 2759.0

R Oct 2023 487 7.9 1065.34 8833 -37 421.11 1037.5 180.9 71 371.7

I Nov 2023 533 9.0 1064.81 8792 -41 421.57 948.0 199.5 66 374.5

C Dec 2023 362 5.9 1068.05 9045 253 423.67 1063.1 133.1 72 367.6

A Jan 2024 368 6.0 1072.67 9413 368 429.50 1023.0 136.8 69 371.7

L Feb 2024 362 6.3 1076.52 9725 312 430.99 977.0 136.4 66 376.2

* Mar 2024 799 13.0 1075.35 9629 -95 428.69 1135.1 309.6 77 387.7

Apr 2024 924 15.5 1072.13 9369 -260 424.13 975.0 361.5 66 391.1

May 2024 1085 17.7 1066.33 8911 -459 417.87 1170.0 413.7 81 381.2

Jun 2024 909 15.3 1062.22 8592 -318 410.98 1413.9 336.0 100 369.5

Jul 2024 806 13.1 1060.58 8467 -125 408.43 1404.0 297.1 100 368.8

Aug 2024 732 11.9 1061.06 8504 37 408.18 1418.0 267.0 100 364.7

Sep 2024 633 10.6 1060.29 8445 -59 410.08 1217.0 229.9 87 363.1

WY 2024 8001 3001.7

Oct 2024 461 7.5 1060.42 8455 10 414.59 886.0 171.7 62 372.3

Nov 2024 602 10.1 1059.19 8362 -93 416.33 877.5 226.7 63 376.4

Dec 2024 633 10.3 1059.16 8360 -2 413.53 884.9 236.9 63 374.4

Jan 2025 516 8.4 1062.30 8598 239 412.85 894.0 193.5 63 375.1

Feb 2025 567 10.2 1063.64 8701 103 414.94 819.5 213.6 57 376.9

Mar 2025 825 13.4 1062.89 8643 -58 414.12 914.5 315.0 64 381.6

Apr 2025 1027 17.3 1058.28 8293 -350 411.90 778.0 396.2 56 385.9

May 2025 1006 16.4 1053.24 7918 -375 404.57 1103.0 366.4 80 364.3

Jun 2025 878 14.8 1049.42 7641 -278 398.13 1348.0 312.0 100 355.3

Jul 2025 775 12.6 1048.24 7556 -85 395.98 1348.0 275.1 100 355.1

Aug 2025 714 11.6 1049.11 7619 62 396.16 1348.0 251.5 100 352.3

Sep 2025 616 10.3 1048.64 7585 -34 397.00 1377.9 218.1 100 354.3

WY 2025 8619 3176.7

Oct 2025 456 7.4 1051.06 7760 175 402.55 1085.3 164.1 78 360.1

Nov 2025 573 9.6 1052.04 7831 71 406.94 1033.6 208.4 74 363.6

Dec 2025 520 8.5 1054.95 8045 214 405.44 1205.4 190.6 86 366.4

Jan 2026 531 8.6 1059.59 8392 348 409.44 897.4 192.8 63 362.8

Feb 2026 583 10.5 1062.17 8589 196 412.97 814.3 216.9 56 371.7

Mar 2026 859 14.0 1062.50 8614 25 413.87 833.9 330.7 58 385.0

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3250 Processed On: 4/9/2024 10:32:55AM 
Most Probable Inflow*

April 2024 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

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

H May 2023 859 14.0 641.83 1667 -28 137.48 255.0 109.4 100 127.4

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

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

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

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

WY 2023 7365 938.3

R Oct 2023 547 8.9 635.96 1511 -76 132.98 189.2 67.1 74 122.7

I Nov 2023 397 6.7 639.94 1616 105 140.75 156.4 50.0 61 125.9

C Dec 2023 334 5.4 640.34 1627 11 141.24 167.8 41.8 66 125.5

A Jan 2024 314 5.1 641.95 1670 44 143.06 164.5 39.1 65 124.8

L Feb 2024 350 6.1 642.15 1675 5 140.83 202.2 43.7 79 124.9

* Mar 2024 779 12.7 642.41 1682 7 138.42 204.0 98.4 80 126.3

Apr 2024 881 14.8 643.00 1699 16 139.02 204.0 110.4 80 125.2

May 2024 1060 17.2 643.00 1699 0 138.50 204.0 132.2 80 124.8

Jun 2024 878 14.8 643.00 1699 0 139.34 207.4 110.2 81 125.5

Jul 2024 800 13.0 642.00 1671 -27 139.46 255.0 100.5 100 125.6

Aug 2024 701 11.4 642.00 1671 0 139.58 255.0 88.2 100 125.7

Sep 2024 666 11.2 640.01 1617 -54 138.67 255.0 83.2 100 124.9

WY 2024 7706 964.9

Oct 2024 621 10.1 633.00 1434 -183 134.61 227.0 75.3 89 121.3

Nov 2024 524 8.8 635.00 1486 51 132.64 159.8 62.6 63 119.5

Dec 2024 501 8.2 639.51 1604 118 136.18 154.7 61.5 61 122.7

Jan 2025 434 7.1 641.80 1666 62 140.08 156.3 54.8 61 126.2

Feb 2025 544 9.8 641.80 1666 0 140.03 156.6 68.6 61 126.2

Mar 2025 770 12.5 643.05 1700 34 139.57 194.1 96.9 76 125.7

Apr 2025 1001 16.8 643.00 1699 -2 138.66 249.9 125.1 98 124.9

May 2025 980 15.9 643.00 1699 0 138.93 255.0 122.7 100 125.2

Jun 2025 847 14.2 643.00 1699 0 139.52 255.0 106.4 100 125.7

Jul 2025 769 12.5 642.00 1671 -27 139.66 255.0 96.8 100 125.8

Aug 2025 683 11.1 642.00 1671 0 139.69 255.0 86.0 100 125.9

Sep 2025 648 10.9 640.01 1617 -54 138.79 255.0 81.0 100 125.0

WY 2025 8323 1037.7

Oct 2025 616 10.0 633.00 1434 -183 134.65 227.0 74.7 89 121.3

Nov 2025 495 8.3 635.00 1486 51 132.86 159.8 59.2 63 119.7

Dec 2025 389 6.3 639.51 1604 118 137.02 154.7 48.0 61 123.4

Jan 2026 450 7.3 641.80 1666 62 139.96 156.3 56.7 61 126.1

Feb 2026 560 10.1 641.80 1666 0 139.91 156.6 70.6 61 126.0

Mar 2026 804 13.1 643.05 1700 34 139.37 194.1 100.9 76 125.6

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3250 Processed On: 4/9/2024 10:32:55AM 
Most Probable Inflow*

April 2024 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

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

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

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

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

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

O Sep 2023 462 7.8 448.12 582 7 81.96 120.0 32.1 100 69.5

WY 2023 5717 395.3

R Oct 2023 439 7.1 447.74 575 -7 81.03 91.0 30.6 76 69.6

I Nov 2023 294 4.9 447.87 578 3 82.97 80.0 20.0 67 67.9

C Dec 2023 253 4.1 447.81 576 -1 82.94 60.0 16.6 50 65.7

A Jan 2024 197 3.2 448.40 588 11 83.76 72.6 12.3 60 62.2

L Feb 2024 264 4.6 446.99 561 -26 80.84 94.1 17.2 78 65.3

* Mar 2024 603 9.8 447.53 571 10 77.23 115.2 41.3 96 68.6

Apr 2024 632 10.6 447.50 570 -1 78.15 117.0 44.1 98 69.9

May 2024 756 12.3 448.50 589 19 77.98 120.0 52.6 100 69.5

Jun 2024 710 11.9 448.70 593 4 78.71 120.0 49.8 100 70.1

Jul 2024 681 11.1 448.00 580 -13 78.80 120.0 47.6 100 69.8

Aug 2024 583 9.5 447.50 571 -10 78.86 120.0 40.6 100 69.7

Sep 2024 495 8.3 447.50 570 0 79.12 120.0 34.4 100 69.6

WY 2024 5907 407.1

Oct 2024 456 7.4 447.50 571 0 79.54 90.0 32.1 75 70.3

Nov 2024 404 6.8 447.50 570 0 79.84 92.0 27.6 77 68.4

Dec 2024 389 6.3 446.50 552 -19 79.56 114.2 24.4 95 62.8

Jan 2025 320 5.2 446.50 552 0 79.64 94.8 21.4 79 66.8

Feb 2025 421 7.6 446.50 552 0 78.46 92.1 29.0 77 68.9

Mar 2025 621 10.1 446.70 555 4 77.44 120.0 42.6 100 68.5

Apr 2025 724 12.2 448.70 593 38 77.73 120.0 50.3 100 69.5

May 2025 730 11.9 448.70 593 0 78.84 120.0 51.3 100 70.3

Jun 2025 691 11.6 448.70 593 0 78.94 120.0 48.6 100 70.3

Jul 2025 658 10.7 448.00 580 -13 78.95 120.0 46.1 100 70.0

Aug 2025 571 9.3 447.50 571 -10 78.94 120.0 39.8 100 69.8

Sep 2025 486 8.2 447.50 570 0 79.18 120.0 33.8 100 69.6

WY 2025 6470 447.0

Oct 2025 454 7.4 447.50 571 0 79.55 90.0 31.9 75 70.3

Nov 2025 368 6.2 447.50 570 0 80.14 92.0 25.3 77 68.7

Dec 2025 291 4.7 446.50 552 -19 80.40 109.4 18.4 91 63.5

Jan 2026 324 5.3 446.50 552 0 79.61 94.8 21.7 79 66.8

Feb 2026 425 7.7 446.50 552 0 78.42 92.1 29.3 77 68.9

Mar 2026 625 10.2 446.70 555 4 77.42 120.0 42.8 100 68.5

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3250 Processed On: 4/9/2024 10:32:55AM 
Most Probable Inflow*

April 2024 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 

* Apr 2023 291 17 5 9 3 4

H May 2023 412 18 21 40 20 7

I Jun 2023 439 43 32 50 22 8

S Jul 2023 483 29 38 45 22 8

T Aug 2023 374 44 31 37 21 6

O Sep 2023 194 44 4 35 20 6

Summer 2023 2195 194 131 215 109 39

R Oct 2023 199 38 8 23 6 6

I Nov 2023 206 34 9 10 5 6

C Dec 2023 245 49 11 12 6 6

A Jan 2024 294 49 9 12 5 5

L Feb 2024 257 44 9 8 5 5

* Mar 2024 270 25 13 18 9 4

Winter 2024 1471 241 59 83 36 32

Apr 2024 229 37 18 24 13 1

May 2024 232 71 54 72 23 6

Jun 2024 251 48 21 30 19 7

Jul 2024 287 24 38 47 23 8

Aug 2024 306 36 31 37 19 7

Sep 2024 227 35 22 27 14 5

Summer 2024 1533 251 184 236 111 33

Oct 2024 192 26 19 24 10 0

Nov 2024 200 28 6 7 4 0

Dec 2024 239 42 10 13 7 1

Jan 2025 286 42 8 10 6 4

Feb 2025 251 32 7 10 5 3

Mar 2025 264 17 8 11 6 3

Winter 2025 1432 188 59 75 38 11

Apr 2025 235 17 11 17 10 2

May 2025 238 71 46 62 23 6

Jun 2025 258 48 33 44 22 7

Jul 2025 295 24 33 39 20 7

Aug 2025 313 36 29 34 18 5

Sep 2025 234 35 26 31 16 4

Summer 2025 1573 230 178 227 109 32

Oct 2025 263 25 24 29 10 4

Nov 2025 262 26 16 19 10 5

Dec 2025 290 38 27 33 16 5

Jan 2026 345 38 11 13 7 5

Feb 2026 302 35 9 12 6 4

Mar 2026 317 22 11 14 8 4

Winter 2026 1779 184 97 119 58 27

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3250 Processed On: 4/9/2024 10:32:55AM
Most Probable Inflow*

April 2024 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 * * * * * * * * E F F E C T I V E S P A C E * * * *

Apr 2024 752 277 573 15596 17198 17991 35188 429 162 232 823 15596 17991 34410 1500 924 0 24.5

May 2024 727 272 566 15569 17134 18251 35385 399 164 205 767 15569 18251 34587 1500 1085 0 25.1

Jun 2024 694 259 481 14634 16067 18709 34777 359 148 85 591 14634 18709 33935 1500 909 0 26.5

Jul 2024 454 77 440 13392 14363 19028 33390 100 -40 -5 55 13392 19028 32475 1500 806 0 26.3

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

Aug 2024 373 121 498 13420 14412 19153 33565 373 121 498 991 13420 19153 33565 1500 732 0 25.9

Sep 2024 428 174 538 13738 14877 19116 33993 428 174 538 1140 13738 19116 33993 2270 633 0 25.4

Oct 2024 493 215 547 13925 15180 19175 34356 493 215 547 1255 13925 19175 34356 3040 461 0 25.2

Nov 2024 519 249 540 13993 15300 19165 34465 519 249 540 1307 13993 19165 34465 3810 602 0 25.0

Dec 2024 551 236 547 14061 15396 19258 34654 551 236 547 1335 14061 19258 34654 4580 633 0 24.9

Jan 2025 643 245 556 14207 15651 19260 34911 643 245 556 1444 14207 19260 34911 5350 516 0 24.8

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

Jan 2025 643 245 556 14207 15651 19260 34911 307 227 466 1000 14207 19260 34467 5350 516 0 24.8

Feb 2025 727 249 561 14478 16015 19022 35037 391 229 471 1091 14478 19022 34591 1500 567 0 24.7

Mar 2025 798 251 558 14649 16256 18919 35175 461 231 467 1159 14649 18919 34727 1500 825 0 24.6

Apr 2025 769 238 512 14807 16327 18977 35304 428 220 415 1063 14807 18977 34846 1500 1027 0 24.5

May 2025 715 197 449 14702 16063 19327 35390 368 179 329 875 14702 19327 34903 1500 1006 0 25.5

Jun 2025 693 149 324 13592 14758 19702 34460 339 126 164 629 13592 19702 33923 1500 878 0 26.8

Jul 2025 465 8 237 12410 13120 19979 33099 91 -18 22 95 12410 19979 32484 1500 775 0 26.6

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

Aug 2025 391 34 275 12468 13168 20064 33232 391 34 275 700 12468 20064 33232 1500 714 0 26.3

Sep 2025 444 71 313 12744 13572 20001 33573 444 71 313 828 12744 20001 33573 2270 616 0 25.9

Oct 2025 516 119 328 12888 13851 20035 33886 516 119 328 962 12888 20035 33886 3040 456 0 25.7

Nov 2025 546 162 323 13064 14096 19860 33956 546 162 323 1031 13064 19860 33956 3810 573 0 25.6

Dec 2025 576 181 323 13231 14312 19789 34101 576 181 323 1081 13231 19789 34101 4580 520 0 25.5

Jan 2026 657 246 327 13448 14677 19575 34253 657 246 327 1229 13448 19575 34253 5350 531 0 25.4

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

Jan 2026 657 246 327 13448 14677 19575 34253 303 224 95 622 13448 19575 33645 5350 531 0 25.4

Feb 2026 729 258 332 13847 15166 19228 34393 375 235 99 709 13847 19228 33783 1500 583 0 25.3

Mar 2026 791 265 328 14133 15517 19031 34548 434 242 94 771 14133 19031 33935 1500 859 0 25.2

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3250 Processed On: 4/9/2024 10:32:55AM