Reservoir Expected Operations the Operation of Lake Powell and Lake

June 24-Month Study Date: June 14, 2021

From: Water Resources Group, Salt Lake City To: All Colorado River Annual Operating Plan (AOP) Recipients

Current Reservoir Status

May Percent June 13, June 13, Reservoir Inflow of Average Midnight Midnight (unregulated) (%) Elevation Reservoir (acre-feet) (feet) Storage (acre-feet)

Fontenelle 76,000 47 6,489.80 217,000 Flaming Gorge 95,900 39 6,024.63 3,146,600 Blue Mesa 89,600 41 7,463.47 388,800 Navajo 169,200 61 6,041.47 1,128,800 Powell 542,900 23 3,561.76 8,457,500

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Expected Operations The operation of Lake Powell and Lake Mead in this June 2021 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 2021 Annual Operating Plan (AOP). Pursuant to the Interim Guidelines, the August 2020 24-Month Study projections of the January 1, 2021, system storage and reservoir water surface elevations set the operational tier for the coordinated operation of Lake Powell and Lake Mead during 2021.

The August 2020 24-Month Study projected the January 1, 2021, Lake Powell elevation to be below the 2021 Equalization Elevation of 3,659 feet and above elevation 3,575 feet. Consistent with Section 6.B of the Interim Guidelines, Lake Powell is operating under the Upper Elevation Balancing Tier for water year 2021. With an 8.23 million acre-foot (maf) release from Lake Powell in water year 2021, the April 2021 24-Month Study projected the end of water year elevation at Lake Powell to be below 3,575 feet. Therefore, in accordance with Section 6.B.1 of the Interim Guidelines, Lake Powell will continue to release 8.23 maf through the remainder of the water year 2021.

Consistent with Section 2.B.5 of the Interim Guidelines, the Intentionally Created Surplus (ICS) Surplus Condition is the criterion governing the operation of Lake Mead for calendar year 2021. In addition, Section III.B of Exhibit 1 to the Lower Basin Drought Contingency Plan (DCP) Agreement is also governing the operation of Lake Mead in calendar year 2021.

The 2021 AOP is available online at: https://www.usbr.gov/lc/region/g4000/aop/AOP21.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 Upper Basin Hydrology Summary is available online at: https://www.usbr.gov/uc/water/crsp/studies/24Month_06_ucb.pdf.

Fontenelle Reservoir -- As of June 7, 2021, the Fontenelle Reservoir pool elevation is 6483.38 feet, which amounts to 53 percent of live storage capacity. Inflows for the month of May totaled 76,000 acre-feet (af) or 47 percent of average.

Due to dry hydrologic conditions in the Upper Green River Basin, Fontenelle’s releases were lowered from 825 cfs to 700 cfs on May 24, 2021. Based on the latest observed inflows and June forecast for the period between April and July, this year’s inflows into Fontenelle Dam are projected to be the 7th driest since 1966.

The June final forecast for unregulated inflows into Fontenelle for the next three months projects dry conditions. June, July, and August inflow volumes amount to 150,000 af (50 percent of average), 65,000 af (37 percent of average), and 35,000 af (46 percent of average), respectively.

The April 22, 2021, Fontenelle Working Group meeting minutes are available online on USBR’s website at https://www.usbr.gov/uc/water/crsp/wg/ft/ftcurrnt.html. The next Fontenelle Working Group meeting is scheduled for 10:00 am on August 26, 2021. Due to the ongoing COVID pandemic this meeting will be held virtually via WebEX. The Fontenelle Working Group is an open public forum for information exchange between Reclamation and other parties associated with the operation of Fontenelle Reservoir.

Flaming Gorge -- As of June 11, 2021, Flaming Gorge Reservoir pool elevation is 6024.67 feet, which amounts to 84 percent of live storage capacity. Unregulated inflows for the month of May are approximately 96,000 acre-feet (af), which is 40% of the average May unregulated inflow volume.

The June final forecast for unregulated inflows into Flaming Gorge for the next three months projects below average conditions. June, July and August forecasted unregulated inflow volumes amount to 160,000 af (41% of average), 67,000 af (32% of average), and 37,000 af (42% of average), respectively.

The June water supply forecast of the April through July unregulated inflow volume into Flaming Gorge Reservoir is 395,000 acre-feet (40% of average).

As part of the adaptive management process, the smallmouth bass flow spike experiment is anticipated to begin on June 21. This experiment is being conducted for the first this year. Full power plant releases (4,600 cfs) are expected to begin at 4 p.m. (MDT) and this will be sustained for 72 hours. Once the experiment is completed, release will begin ramping down at a maximum of 2000 cfs per day. Releases are anticipated to be 860 cfs on June 26.

The following paragraph provides further details on the experimental smallmouth bass flow spike. In addition to increasing flow in the river, water temperatures will also decrease, which are conditions that have been shown to reduce the survival rate of smallmouth bass eggs and fry by sweeping them off the spawning nests and disrupting parental habits of adults. Smallmouth bass larvae and fry (the target of the Flow Spike Experiment) typically emerge from eggs in greatest abundance about 10-14 days following onset of spawning activity. We believe spawning activity has begun or will begin very soon (early to mid-June), as river temperatures have increased beyond 16 degrees C (about 61 degree F). We plan to schedule the experiment to happen during the week to avoid weekend recreational levels. As this week approaches, we will send out additional information including a hydrograph outlining the proposed timing and release schedule.

Reclamation is planning to hold the next Flaming Gorge Working Group meeting on August 12, 2021 at 10:00 am MDT via WebEx. The Flaming Gorge Working Group is an open public forum for information exchange between Reclamation and the stakeholders of Flaming Gorge Dam. The public is encouraged to attend and comment on the operations and plans presented by Reclamation at these meetings. Meeting notes from past Working Group meetings are posted on the Working Group webpage. For more information on this group and these meetings please contact Dale Hamilton at 801-379-1186.

Aspinall Unit Reservoirs – As of June 8, 2021 releases from Crystal Dam are approximately 1520 cfs. Gunnison Tunnel diversions have begun for the irrigation season and are currently about 1040 cfs and is near full capacity. Flows of the Gunnison River in the Black Canyon are being maintained at about 485 cfs.

The June forecast for the April through July volume of unregulated inflow to Blue Mesa has been issued and is now 310,000 acre-feet (46 percent of average). Under the Aspinall Record of Decision (Aspinall ROD), in combination with the Black Canyon Reserved Water Right Decree (BC Reserved Water Right), a spring peak release from Crystal Dam was made on May 15th and May 16th resulting in a mean flow for 24 hours in the Black Canyon of 1,023 cfs. This was slightly above what is required under the BC Reserved Water Right which, for this year computed to a target flow of 973 cfs. Flows in the Whitewater Reach were required to reach only 900 cfs under the Aspinall ROD this year based on the dry conditions that are occurring. Flows in this reach have been well above 900 cfs for most of the spring so far.

The unregulated inflow volume in May to Blue Mesa was 90,000 af (41 percent of average). Unregulated Inflow volumes forecasted for Blue Mesa for the next three months (June, July and August) are projected to be: 125,000 af (48 percent of average), 47,000 af (40 percent of average) and 33,000 af (87 percent of average), respectively. The June 24-Month Study is reflective of these new forecasts.

The 2021 water year unregulated inflow volume is projected to be 506,478 af (53 percent of average). The water supply period (April-July) for 2021 is forecasted to have 310,000 af of unregulated inflow (46 percent of average). Current forecasting projects at a probability of 80 percent that the water year unregulated inflow volume to Blue Mesa will be in the range from 250,000 acre-feet to 370,000 acre-feet.

Blue Mesa is not projected to fill in 2021 under the most probable inflow scenario. Blue Mesa is projected to be at a peak elevation of approximately 7,459 feet by late July, 2021. This will be down approximately 60 feet from the full pool elevation (7,519.4 feet) and water storage in Blue Mesa at this time will be approximately 361,000 acre-feet which is 44 percent of live capacity.

The Aspinall Unit Operations Group is an open public forum for information exchange between Reclamation and the stakeholders of the Aspinall Unit. The public is encouraged to attend and comments on the operations and plans presented by Reclamation at these meetings. Meeting notes from past working Group meetings are posted on the Operations Group webpage. For more information on this group and these meetings please contact Erik Knight in the Grand Junction Area Office at (970) 248-0629.

The next Operations Group meeting will be held on August 19, 2021 at 1:00 pm MDT. It is not yet decided if this will be an in-person meeting or virtual. Contact Erik Knight in the Grand Junction Area Office at (970) 248-0629 to get the web address for the virtual Operations Group meeting or for additional information.

Navajo Reservoir – On June 7th, the daily average release rate from Navajo Dam was 300 cfs while reservoir inflow was averaging approximately 2,266 cfs. The water surface elevation was 6040.83 feet above sea level. At this elevation the live storage is 1.122 maf (66 percent of live storage capacity) and the active storage is 0.460 maf (44 percent of active storage capacity). The Navajo Indian Irrigation Project (NIIP) is diverting 567 cfs. The San Juan-Chama project is diverting 584 cfs from the basin above the reservoir. The river flow measured at the Animas River at Farmington USGS gage was at 2,380 cfs. River flow at the San Juan River at Four Corners USGS gage was 2,640 cfs.

Releases from Navajo Dam are made for authorized purposes of the Navajo Unit and are pursuant to the Record of Decision for the Navajo Reservoir Operations. Releases target the San Juan River Recovery Implementation Program's recommended downstream baseflow range of 500 cfs to 1,000 cfs through the critical habitat reach of the San Juan River (Farmington, NM to Lake Powell). Current modeling shows the release will most likely vary between 300 and 600 cfs to accomplish this for the remainder of spring.

Navajo was at 6039.3 ft of pool elevation and 1,104,936 acre-ft of storage by the end of May, which was 79 percent of average for the end of the month. The release averaged 440 cfs (as measured at the USGS San Juan at Archuleta gage) and totaled 27 kaf, which was 24 percent of average for the month. Preliminary modified unregulated inflow (MUI) into Navajo was 169 kaf, which was 66 percent of average for the month. Calculated evaporation for the month was 3 kaf. Navajo had a net storage gain of 60 kaf in May.

The most probable MUI forecast for June, July, and August is 75,000 af (34% of average), 10,000 af (15% of average), and 20,000 af (44% of average), respectively.

From April 1st through today, modified unregulated inflow to the reservoir has totaled 293.9 kaf.

The April-July runoff forecasts are as follows:

Min Probable: 300 kaf (41% of average, an increase of 30 kaf since the last forecast). Of this volume 98% has already been observed. Most Probable: 335 kaf (45% of average, an increase of 25 kaf since the last forecast). Of this volume 88% has already been observed. Max Probable: 380 kaf (52% of average, a decrease of 5 kaf since the last forecast). Of this volume 77% has already been observed.

Reclamation conducts Public Operations Meetings three times per year to gather input for determining upcoming operations for Navajo Reservoir. Input from individuals, organizations, and agencies along with other factors such as weather, water rights, endangered species requirements, flood control, hydro power, recreation, fish and wildlife management, and reservoir levels, will be considered in the development of these reservoir operation plans. In addition, the meetings are used to coordinate activities and exchange information among agencies, water users, and other interested parties concerning the San Juan River and Navajo Reservoir. The next meeting will be held virtually on Tuesday, August 24th, at 1:00 PM.

Glen Canyon Dam / Lake Powell

Current Status The unregulated inflow volume to Lake Powell during May was 543 thousand acre-feet (kaf) (23% of average). The release volume from Glen Canyon Dam in April was 624 kaf. The end of May elevation and storage of Lake Powell were 3560.57 feet (139 feet from full pool) and 8.37 million acre-feet (maf) (34% of live capacity), respectively.

Water year 2021 observed unregulated inflows from October 2020 through June 13, 2021 are 215 kaf greater than the observed unregulated inflows at this point in water year 2002, the driest year on record.

Current Operations The operating tier for water year 2021 (September 2020 through October 2021) was established in August 2020 as the Upper Elevation Balancing Tier, consistent with Section 6.B of the Interim Guidelines. Consistent with Section 6.B of the Interim Guidelines, Lake Powell’s operations in water year 2021 will be governed by the Upper Elevation Balancing Tier. With an 8.23 maf release from Lake Powell in water year 2021, the April 2021 24-Month Study projected the end of water year elevation at Lake Powell to be below 3,575 feet. Therefore, in accordance with Section 6.B.1 of the Interim Guidelines, Lake Powell will continue to release 8.23 maf through the remainder of the water year 2021.

In June the release volume will be approximately 651 kaf, with fluctuations anticipated between about 7,359 cubic feet per second (cfs) in the nighttime to about 13,869 cfs in the daytime, and consistent with the Glen Canyon Dam, Record of Decision (dated December 2016). The anticipated release volume for July 2021 is 766,000 af.

In addition to daily scheduled fluctuations for power generation, the instantaneous releases from Glen Canyon Dam may also fluctuate to provide 40 megawatts (mw) of system regulation. These instantaneous release adjustments stabilize the electrical generation and transmission system and translate to a range of about 1,100 cfs above or below the hourly scheduled release rate. Under system normal conditions, fluctuations for regulation are typically short lived and generally balance out over the hour with minimal or no noticeable impacts on downstream river flow conditions.

Releases from Glen Canyon Dam can also fluctuate beyond scheduled releases when called upon to respond to unscheduled power outages or power system emergencies. Depending on the severity of the system emergency, the response from Glen Canyon Dam can be significant, within the full range of the operating capacity of the power plant for as long as is necessary to maintain balance in the transmission system. Glen Canyon Dam currently maintains 30 mw (approximately 800 cfs) of generation capacity in reserve in order to respond to a system emergency even when generation rates are already high. System emergencies occur infrequently and typically require small responses from Glen Canyon Dam. However, these responses can have a noticeable impact on the river downstream of Glen Canyon Dam.

Inflow Forecasts and Model Projections The forecast for water year 2021 unregulated inflow to Lake Powell, issued on June 3, 2021, by the Colorado Basin River Forecast Center, projects that the most probable (median) unregulated inflow volume this year will be 3.37 maf (31% of average).

In addition to the June 2021 24-Month Study based on the Most Probable inflow scenario, and in accordance with the Upper Basin Drought Response Operations Agreement (DROA), Reclamation has conducted model runs in June to determine a possible range of reservoir elevations under Probable Minimum and Probable Maximum inflow scenarios. Normally, outside of the DROA, Probable Minimum and Probable Maximum model runs are only conducted in January, April, August, and October. The Probable Minimum inflow scenario reflects a dry hydrologic condition which statistically would be exceeded 90% of the time. The Most Probable inflow scenario reflects a median hydrologic condition which statistically would be exceeded 50% of the time. The Probable Maximum inflow scenario reflects a wet hydrologic condition which statistically would be exceeded 10% of the time. There is approximately an 80% probability that a future elevation will fall inside the range of the minimum and maximum inflow scenarios. Additionally, there are possible inflow scenarios that would results in reservoir elevations falling outside the ranges indicated in these reports.

The minimum probable 24-Month Study will continue showing operations under the Lower Elevation Balancing Tier (LEBT) that is pursuant to the 2007 Record of Decision on the Colorado River Interim Guidelines for Lower Basin Shortages and the Coordinated Operations of Lake Powell and Lake Mead (Interim Guidelines).

The DROA coordination will continue until either (i) the minimum probable projected elevation remains above 3,525 feet for 24 months or (ii) the process moves to the next step when the most probable projected elevation indicates Powell elevations below 3,525 feet and a Drought Response Operations Plan is developed.

The June forecast for water year 2021 ranges from a minimum probable of 2.83 maf (26% of average) to a maximum probable of 4.46 maf (41% of average). There is a 10% chance that inflows could be higher than the current maximum probable forecast and a 10% chance that inflows could be lower than the minimum probable forecast.

Based on the current forecast of 3.37 maf unregulated inflow, the June 24-Month Study projects Lake Powell elevation will end water year 2021 near 3,542.42 feet with approximately 7.06 maf in storage (29% of capacity). Note that projections of elevation and storage for water year 2021 have significant uncertainty at this point in the season. Projections of end of water year 2021 elevation and storage using the minimum and maximum probable inflow forecast from and results from the June DROA 2021 model runs are 3,538.92 feet (6.82 maf, 28% of capacity) and 3,552.55 feet (7.77 maf, 32% of capacity), respectively. Under these scenarios, there is a 10% chance that inflows will be higher, resulting in higher elevation and storage, and 10% chance that inflows will be lower, resulting in lower elevation and storage. The annual release volume from Lake Powell during water year 2021 will be 8.23 maf as determined under Section 6.B.1 of the Interim Guidelines.

Upper Colorado River Basin Hydrology Upper Colorado River Basin regularly experiences significant year to year hydrologic variability. During the 21-year period 2000 to 2020, however, the unregulated inflow to Lake Powell, which is a good measure of hydrologic conditions in the Colorado River Basin, was above average in only 4 out of the past 19 years. The period 2000-2020 is the lowest 21-year period since the closure of Glen Canyon Dam in 1963, with an average unregulated inflow of 8.62 maf, or 80% of the 30-year average (1981-2010). (For comparison, the 1981-2010 total water year average is 10.83 maf.) The unregulated inflow during the 2000-2020 period has ranged from a low of 2.64 maf (24% of average) in water year 2002 to a high of 15.97 maf (147% of average) in water year 2011. In water year 2018 unregulated inflow volume to Lake Powell was 4.6 maf (43% of average), the third driest year on record above 2002 and 1977. Under the current most probable forecast, the total water year 2021 unregulated inflow to Lake Powell is projected to be 3.37 maf (31% of average).

At the beginning of water year 2021, total system storage in the Colorado River Basin was 28.88 maf (48% of 59.6 maf total system capacity). This is a decrease of 2.77 maf over the total storage at the beginning of water year 2020 when total system storage was 31.64 maf (53% of capacity). Since the beginning of water year 2000, total Colorado Basin storage has experienced year to year increases and decreases in response to wet and dry hydrology, ranging from a high of 94% of capacity at the beginning of 2000 to the now current level of 48% of capacity at the beginning of water year 2021. Based on current inflow forecasts, the current projected end of water year total Colorado Basin reservoir storage for water year 2021 is approximately 22.82 maf (38% of total system capacity). The actual end of water year 2021 system storage may vary from this projection, primarily due to uncertainty regarding this season’s runoff and reservoir inflow.

To: All Annual Operating Plan Recipients

From: Michael Bernardo, P.E. From: Paul Davidson River Operations Manager Water Management Chief Boulder Canyon Operations Office Water Management Group Lower Colorado Basin Region Upper Colorado Basin Region P.O. Box 61470, LC-4600 125 South State Street, Room 8100 Boulder City, NV 89006-1470 Salt Lake City, UT 84138-5571 Phone: (702) 293-8111 Phone: (801) 524-3709

The operation of Lake Powell and Lake Mead in this June 2021 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 2021 Annual Operating Plan (AOP). Pursuant to the Interim Guidelines, the August 2020 24-Month Study projections of the January 1, 2021, system storage and reservoir water surface elevations set the operational tier for the coordinated operation of Lake Powell and Lake Mead during 2021.

Current runoff projections into Lake Powell are provided by the National Weather Service’s Colorado Basin River Forecast Center and are as follows. The observed unregulated inflow into Lake Powell for the month of May was 0.543 maf or 23 percent of the 30-year average from 1981 to 2010. The June unregulated inflow forecast for Lake Powell is 0.750 maf or 28 percent of the 30-year average. The 2021 April through July unregulated inflow forecast is 1.800 maf or 25 percent of average.

In this study, the calendar year 2021 diversion for Metropolitan Water District of Southern California (MWD) is projected to be 1.087 maf. The calendar year 2021 diversion for the Central Arizona Project (CAP) is projected to be 1.359 maf. Consumptive use for Nevada above Hoover (SNWP Use) is projected to be 0.248 maf for calendar year 2021.

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 PO&M 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 Colleen Dwyer at (702) 293-8420.

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

Observed Inflow (kaf) May Inflow Forecast (kaf) Seasonal Outlook Reservoir Feb Mar Apr May %Avg Jun Jul Aug Apr-Jul %Avg Lake Powell 201 297 289 543 23% 750 218 150 1800 25% Fontenelle 24 40 54 76 46% 150 65 35 345 48% Flaming Gorge 31 68 72 96 40% 160 67 37 395 40% Blue Mesa 20 29 47 91 41% 125 47 33 310 46% Morrow Point 21 30 49 93 38% 138 50 35 330 45% Crystal 24 32 54 103 37% 150 53 38 360 43% Taylor Park 3.5 3.8 6.8 16.1 57% 24 11.1 6 58 59% Vallecito 2.7 4.1 13.6 50 70% 34 12.4 10 110 57% Navajo 13.3 24 81 169 61% 75 10 20 335 46% Lemon 0.4 0.6 2.5 13.6 63% 6.8 2.1 2 25 45% McPhee 2.2 4.1 12 40 32% 19 5 4.5 76 26% Ridgway 2.6 3.7 5.2 13.8 53% 19 9.8 7 48 48% Deerlodge 18.2 36 56 192 37% 145 22 8 415 33% Durango 5.8 6.7 17.9 72 49% 64 22.1 16 176 42%

OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS June 2021 24-Month Study Most Probable Inflow* Fontenelle Reservoir

Regulated Evap Power Bypass Total Reservoir Elev Live Inflow Losses Release Release Release End of Month Storage Date (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (Ft) (1000 Ac-Ft)

* Jun 2020 288 2 107 73 180 6501.43 309 H Jul 2020 145 3 99 23 121 6504.12 330 I Aug 2020 41 2 74 0 74 6499.62 295 S Sep 2020 25 2 26 35 61 6494.55 258 WY 2020 996 15 856 137 993

T Oct 2020 32 1 0 55 55 6490.95 225 O Nov 2020 33 1 17 35 52 6487.89 205 R Dec 2020 27 1 50 1 51 6483.85 180 I Jan 2021 25 1 48 2 51 6479.03 153 C Feb 2021 24 0 46 0 46 6474.49 132 A Mar 2021 40 0 51 0 51 6472.03 121 L Apr 2021 54 1 49 0 49 6473.03 125 * May 2021 76 1 49 0 49 6478.67 152

Jun 2021 150 2 42 0 42 6495.53 265 Jul 2021 65 3 47 0 47 6497.67 281 Aug 2021 35 2 49 0 49 6495.41 265 Sep 2021 28 2 48 0 48 6492.38 243 WY 2021 589 14 495 94 589

Oct 2021 33 1 49 0 49 6489.83 226 Nov 2021 33 1 30 21 50 6487.08 208 Dec 2021 27 1 52 0 52 6482.84 182 Jan 2022 24 1 52 0 52 6477.54 153 Feb 2022 23 0 47 0 47 6472.36 129 Mar 2022 39 0 52 0 52 6469.19 115 Apr 2022 65 1 55 0 55 6471.46 125 May 2022 128 1 61 0 61 6484.14 190 Jun 2022 260 2 103 49 153 6499.58 295 Jul 2022 170 3 102 33 135 6503.76 327 Aug 2022 60 2 71 0 71 6502.08 314 Sep 2022 43 2 60 0 60 6499.67 296 WY 2022 905 15 734 104 838

Oct 2022 44 1 61 0 61 6497.15 277 Nov 2022 43 1 68 0 68 6493.47 251 Dec 2022 33 1 71 0 71 6487.74 212 Jan 2023 31 1 71 0 71 6481.07 172 Feb 2023 29 1 64 0 64 6474.01 136 Mar 2023 53 0 69 0 69 6470.43 120 Apr 2023 82 1 70 0 70 6473.14 132 May 2023 169 1 90 0 90 6487.35 210

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3146 Processed On: 6/11/2021 10:17:40AM OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS June 2021 24-Month Study Most Probable Inflow* Flaming Gorge Reservoir

Unreg Reg Evap Power Bypass Total Bank Reservoir Elev Live Jensen Inflow Inflow Losses Release Release Release Storage End of Month Storage Flow Date (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (Ft) (1000 Ac-Ft) (1000 Ac-Ft) * Jun 2020 342 236 10 157 31 188 131 6027.76 3263 530 H Jul 2020 163 134 13 90 0 90 133 6028.55 3293 131 I Aug 2020 38 67 12 112 0 112 130 6027.10 3238 124 S Sep 2020 28 64 11 98 0 98 129 6025.93 3195 112 WY 2020 1255 1251 80 1333 62 1395 2825

T Oct 2020 25 50 7 64 0 64 128 6025.38 3174 85 O Nov 2020 37 55 4 54 0 54 128 6025.33 3172 82 R Dec 2020 24 48 2 62 0 62 127 6024.91 3157 88 I Jan 2021 31 57 2 62 0 62 127 6024.75 3151 88 C Feb 2021 31 52 2 56 0 56 127 6024.59 3145 79 A Mar 2021 68 79 3 52 0 52 127 6025.21 3168 96 L Apr 2021 72 67 5 51 0 51 128 6025.49 3178 112 * May 2021 96 72 8 95 0 95 127 6024.69 3149 296

Jun 2021 160 52 10 82 0 82 125 6023.63 3110 227 Jul 2021 67 49 13 52 0 52 125 6023.22 3095 74 Aug 2021 37 51 12 52 0 52 124 6022.89 3083 60 Sep 2021 30 50 11 50 0 50 124 6022.60 3072 56 WY 2021 677 682 78 731 0 731 1343

Oct 2021 41 57 7 52 0 52 124 6022.56 3071 69 Nov 2021 43 60 3 50 0 50 124 6022.75 3078 74 Dec 2021 28 53 2 52 0 52 124 6022.74 3078 71 Jan 2022 31 59 2 52 0 52 124 6022.90 3083 69 Feb 2022 34 58 2 47 0 47 124 6023.15 3093 63 Mar 2022 83 96 3 52 0 52 126 6024.25 3133 112 Apr 2022 115 105 5 50 0 50 128 6025.55 3181 215 May 2022 170 103 8 67 0 67 129 6026.31 3209 512 Jun 2022 300 193 10 124 0 124 131 6027.81 3265 574 Jul 2022 190 155 14 59 0 59 135 6029.88 3344 134 Aug 2022 68 79 13 99 0 99 133 6029.06 3313 118 Sep 2022 47 64 11 101 0 101 131 6027.84 3266 114 WY 2022 1150 1083 79 802 0 802 2122

Oct 2022 52 69 7 78 0 78 131 6027.42 3251 109 Nov 2022 49 74 3 74 0 74 131 6027.35 3248 107 Dec 2022 33 71 2 97 0 97 130 6026.64 3221 124 Jan 2023 40 80 2 97 0 97 129 6026.14 3203 124 Feb 2023 44 79 2 88 0 88 128 6025.86 3192 112 Mar 2023 95 110 3 87 0 87 129 6026.38 3212 166 Apr 2023 125 113 5 85 0 85 130 6026.98 3234 292 May 2023 246 167 8 114 0 114 132 6028.14 3278 628

Regulated Total Reservoir Elev Live Inflow Release End of Month Storage Date (1000 Ac-Ft) (1000 Ac-Ft) (Ft) (1000 Ac-Ft) * Jun 2020 22 16 9322.93 92 H Jul 2020 8 17 9317.91 83 I Aug 2020 4 14 9311.83 73 S Sep 2020 5 9 9309.62 69 WY 2020 101 113

T Oct 2020 4 5 9308.95 68 O Nov 2020 4 5 9308.44 67 R Dec 2020 4 5 9307.73 66 I Jan 2021 4 5 9306.89 65 C Feb 2021 3 5 9305.99 64 A Mar 2021 4 5 9304.90 62 L Apr 2021 7 5 9305.94 64 * May 2021 16 10 9310.13 70

Jun 2021 24 16 9314.71 78 Jul 2021 11 17 9310.99 71 Aug 2021 6 15 9304.92 62 Sep 2021 4 12 9299.38 54 WY 2021 91 106

Oct 2021 5 5 9298.88 54 Nov 2021 4 4 9298.66 53 Dec 2021 4 4 9297.94 52 Jan 2022 3 4 9296.89 51 Feb 2022 3 4 9295.79 50 Mar 2022 3 4 9294.54 48 Apr 2022 5 6 9293.71 47 May 2022 24 11 9303.54 60 Jun 2022 37 15 9317.29 82 Jul 2022 15 23 9312.69 74 Aug 2022 8 22 9303.57 60 Sep 2022 6 18 9294.82 48 WY 2022 116 122

Oct 2022 6 13 9289.30 42 Nov 2022 5 5 9289.13 42 Dec 2022 5 5 9288.63 41 Jan 2023 4 5 9287.78 40 Feb 2023 4 5 9286.93 40 Mar 2023 5 5 9286.25 39 Apr 2023 9 9 9286.25 39 May 2023 27 15 9296.63 51

UnReg Regulated Evap Power Bypass Total Reservoir Elev Live Inflow Inflow Losses Release Release Release End of Month Storage Date (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (Ft) (1000 Ac-Ft) * Jun 2020 139 131 1 83 3 85 7491.64 594 H Jul 2020 46 55 1 92 1 92 7486.61 555 I Aug 2020 26 36 1 95 0 95 7478.53 495 S Sep 2020 23 26 1 80 2 82 7470.42 439 WY 2020 607 619 8 806 26 908

T Oct 2020 20 22 0 66 0 66 7463.47 389 O Nov 2020 25 25 0 18 0 18 7464.59 396 R Dec 2020 21 22 0 21 0 21 7464.73 397 I Jan 2021 22 23 0 19 0 19 7465.24 400 C Feb 2021 20 22 0 21 0 21 7465.37 401 A Mar 2021 29 30 0 32 0 32 7465.07 399 L Apr 2021 47 46 1 79 0 79 7459.68 365 * May 2021 90 83 1 96 2 98 7457.14 350

Jun 2021 125 117 1 74 0 74 7464.06 393 Jul 2021 47 53 1 97 0 97 7456.70 347 Aug 2021 33 42 1 81 0 81 7449.71 308 Sep 2021 27 35 1 73 0 73 7442.22 268 WY 2021 505 521 6 678 2 680

Oct 2021 26 27 0 70 0 70 7433.16 225 Nov 2021 22 22 0 16 0 16 7434.53 231 Dec 2021 19 20 0 17 0 17 7435.24 235 Jan 2022 18 19 0 18 0 18 7435.61 236 Feb 2022 15 16 0 15 0 15 7435.78 237 Mar 2022 26 28 0 19 0 19 7437.46 245 Apr 2022 55 56 0 41 0 41 7440.51 260 May 2022 183 170 1 167 0 167 7441.03 263 Jun 2022 255 233 1 56 0 56 7471.10 439 Jul 2022 92 100 1 72 0 72 7474.89 465 Aug 2022 49 63 1 77 0 77 7472.74 450 Sep 2022 35 47 1 72 0 72 7468.85 424 WY 2022 795 801 6 639 0 639

Oct 2022 36 43 0 69 0 69 7464.75 397 Nov 2022 31 31 0 14 0 14 7467.26 413 Dec 2022 27 27 0 15 0 15 7469.04 425 Jan 2023 25 26 0 15 0 15 7470.55 435 Feb 2023 23 24 0 14 0 14 7472.00 445 Mar 2023 37 38 0 17 0 17 7475.02 466 Apr 2023 78 78 1 38 0 38 7480.55 506 May 2023 199 187 1 166 0 166 7483.20 526

Unreg Blue Mesa Side Total Power Bypass Total Reservoir Elev Live Inflow Release Inflow Inflow Release Release Release End of Month Storage Date (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (Ft) (1000 Ac-Ft) * Jun 2020 142 85 4 89 85 0 85 7152.13 111 H Jul 2020 47 92 1 93 93 0 93 7152.06 111 I Aug 2020 27 95 1 96 95 0 97 7151.26 110 S Sep 2020 23 82 1 83 80 0 84 7149.87 109 WY 2020 632 908 25 933 917 0 933

T Oct 2020 21 66 1 67 66 0 66 7151.06 110 O Nov 2020 27 18 2 20 23 0 23 7147.26 107 R Dec 2020 24 21 3 24 23 0 23 7148.38 108 I Jan 2021 23 19 1 21 23 0 23 7145.78 106 C Feb 2021 21 21 1 22 21 0 21 7146.38 106 A Mar 2021 30 32 1 33 35 0 35 7143.99 104 L Apr 2021 49 79 1 81 82 0 82 7141.50 103 * May 2021 93 98 4 102 91 0 91 7155.08 113

Jun 2021 138 74 13 87 88 0 88 7153.72 112 Jul 2021 50 97 3 100 100 0 100 7153.73 112 Aug 2021 35 81 2 83 83 0 83 7153.73 112 Sep 2021 30 73 3 76 76 0 76 7153.73 112 WY 2021 541 680 36 716 712 0 712

Oct 2021 29 70 3 73 73 0 73 7153.73 112 Nov 2021 24 16 2 18 18 0 18 7153.73 112 Dec 2021 21 17 2 19 19 0 19 7153.73 112 Jan 2022 20 18 2 20 20 0 20 7153.73 112 Feb 2022 17 15 2 17 17 0 17 7153.73 112 Mar 2022 29 19 3 22 22 0 22 7153.73 112 Apr 2022 64 41 9 50 50 0 50 7153.73 112 May 2022 200 167 17 184 184 0 184 7153.73 112 Jun 2022 270 56 15 71 71 0 71 7153.72 112 Jul 2022 96 72 4 76 76 0 76 7153.73 112 Aug 2022 52 77 3 80 80 0 80 7153.73 112 Sep 2022 38 72 3 75 75 0 75 7153.73 112 WY 2022 860 639 65 704 704 0 704

Oct 2022 39 69 3 72 72 0 72 7153.73 112 Nov 2022 33 14 2 16 16 0 16 7153.73 112 Dec 2022 28 15 2 17 17 0 17 7153.73 112 Jan 2023 27 15 2 18 18 0 18 7153.73 112 Feb 2023 25 14 2 16 16 0 16 7153.73 112 Mar 2023 41 17 4 20 20 0 20 7153.73 112 Apr 2023 89 38 11 48 48 0 48 7153.73 112 May 2023 220 166 21 187 187 0 187 7153.73 112

Unreg Morrow Side Total Power Bypass Total Reservoir Elev Live Tunnel Below Tunnel Inflow Release Inflow Inflow Release Release Release End of Month Storage Flow Flow Date (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) * Jun 2020 148 85 6 91 92 0 93 6747.34 15 62 32 H Jul 2020 48 93 2 95 94 0 94 6750.20 16 65 32 I Aug 2020 27 97 1 97 97 0 97 6750.09 16 64 35 S Sep 2020 25 84 1 85 59 27 85 6749.98 16 59 28 WY 2020 683 933 51 984 905 72 984 447 535

T Oct 2020 23 66 2 68 49 19 67 6751.39 16 42 25 O Nov 2020 29 23 2 25 25 0 25 6751.22 16 0 24 R Dec 2020 27 23 2 26 25 0 26 6751.57 17 1 24 I Jan 2021 25 23 2 25 25 0 25 6748.38 16 0 24 C Feb 2021 24 21 2 23 23 0 23 6748.83 16 0 22 A Mar 2021 32 35 2 37 37 0 37 6748.74 16 11 25 L Apr 2021 54 82 6 88 86 0 87 6752.67 17 51 36 * May 2021 103 91 10 101 100 1 100 6753.35 17 64 37

Jun 2021 150 88 12 100 100 0 100 6753.03 17 61 39 Jul 2021 53 100 3 103 103 0 103 6753.04 17 65 38 Aug 2021 38 83 3 86 86 0 86 6753.04 17 65 21 Sep 2021 34 76 4 80 80 0 80 6753.04 17 55 25 WY 2021 591 712 49 762 740 21 760 416 342

Oct 2021 34 73 5 78 78 0 78 6753.04 17 30 48 Nov 2021 27 18 3 21 21 0 21 6753.04 17 0 21 Dec 2021 24 19 3 22 22 0 22 6753.04 17 0 22 Jan 2022 22 20 2 22 22 0 22 6753.04 17 0 22 Feb 2022 19 17 2 19 19 0 19 6753.04 17 0 19 Mar 2022 33 22 4 26 26 0 26 6753.04 17 5 21 Apr 2022 74 50 10 60 60 0 60 6753.04 17 42 18 May 2022 230 184 30 214 134 79 214 6753.04 17 62 152 Jun 2022 300 71 30 101 100 0 100 6753.03 17 61 39 Jul 2022 106 76 10 86 86 0 86 6753.04 17 65 21 Aug 2022 58 80 6 86 86 0 86 6753.04 17 65 21 Sep 2022 43 75 5 80 80 0 80 6753.04 17 55 25 WY 2022 970 704 110 814 734 79 813 385 428

Oct 2022 45 72 5 77 77 0 77 6753.04 17 55 22 Nov 2022 37 16 5 21 21 0 21 6753.04 17 0 21 Dec 2022 33 17 5 22 22 0 22 6753.04 17 0 22 Jan 2023 31 18 4 22 22 0 22 6753.04 17 0 22 Feb 2023 29 16 4 19 19 0 19 6753.04 17 0 19 Mar 2023 47 20 6 26 26 0 26 6753.04 17 5 21 Apr 2023 100 48 12 60 60 0 60 6753.04 17 42 18 May 2023 247 187 27 214 134 80 214 6753.04 17 62 152

Regulated Total Reservoir Elev Live Inflow Release End of Month Storage Date (1000 Ac-Ft) (1000 Ac-Ft) (Ft) (1000 Ac-Ft) * Jun 2020 38 48 7660.61 114 H Jul 2020 11 38 7649.57 86 I Aug 2020 5 36 7635.21 54 S Sep 2020 4 28 7620.77 30 WY 2020 167 213

T Oct 2020 3 2 7620.99 30 O Nov 2020 3 0 7623.08 33 R Dec 2020 3 0 7624.62 36 I Jan 2021 3 0 7626.24 38 C Feb 2021 3 0 7627.63 41 A Mar 2021 4 0 7629.73 44 L Apr 2021 14 1 7636.28 57 * May 2021 50 30 7645.56 77

Jun 2021 34 37 7644.02 73 Jul 2021 12 35 7632.68 50 Aug 2021 10 32 7618.32 27 Sep 2021 10 26 7602.88 11 WY 2021 149 165

Oct 2021 10 14 7596.90 7 Nov 2021 7 2 7602.67 11 Dec 2021 5 2 7606.50 14 Jan 2022 4 2 7608.82 16 Feb 2022 4 2 7610.63 18 Mar 2022 6 2 7614.38 22 Apr 2022 19 2 7626.73 39 May 2022 57 31 7640.24 65 Jun 2022 65 43 7649.83 87 Jul 2022 27 42 7643.32 72 Aug 2022 17 38 7633.03 51 Sep 2022 15 30 7624.38 36 WY 2022 235 208

Oct 2022 13 17 7621.11 31 Nov 2022 9 2 7625.19 37 Dec 2022 7 2 7628.24 42 Jan 2023 6 2 7630.42 46 Feb 2023 5 2 7632.32 49 Mar 2023 9 2 7636.11 56 Apr 2023 23 2 7645.80 77 May 2023 69 31 7660.92 115

Mod Unreg Azotea Reg Evap NIIP Total Reservoir Elev Live Farmington Inflow Tunnel Div Inflow Losses Diversion Release End of Month Storage Flow Date (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (Ft) (1000 Ac-Ft) (1000 Ac-Ft) * Jun 2020 65 8 64 4 41 31 6060.49 1354 96 H Jul 2020 3 1 29 4 47 47 6054.99 1285 58 I Aug 2020 -15 0 16 3 44 52 6048.01 1202 46 S Sep 2020 -7 0 17 2 21 47 6043.32 1149 44 WY 2020 431 48 429 27 230 411 671

T Oct 2020 6 0 6 1 9 42 6039.09 1103 42 O Nov 2020 17 0 14 1 0 22 6038.29 1094 37 R Dec 2020 10 0 7 1 0 22 6036.88 1079 33 I Jan 2021 12 0 10 1 0 24 6035.47 1065 33 C Feb 2021 13 0 11 1 1 22 6034.25 1052 32 A Mar 2021 24 1 20 1 4 24 6033.31 1042 32 L Apr 2021 81 13 56 2 20 32 6033.54 1045 31 * May 2021 169 25 124 3 34 27 6039.27 1105 65

Jun 2021 75 7 71 4 51 25 6038.42 1096 89 Jul 2021 10 0 33 4 56 46 6031.45 1023 69 Aug 2021 20 1 42 3 47 41 6026.54 974 57 Sep 2021 25 0 40 2 26 33 6024.44 954 49 WY 2021 463 47 434 22 248 360 569

Oct 2021 30 1 34 1 9 22 6024.51 954 39 Nov 2021 25 0 21 1 0 19 6024.66 956 31 Dec 2021 19 0 16 0 0 19 6024.29 952 28 Jan 2022 18 0 16 0 0 22 6023.61 946 30 Feb 2022 20 0 18 1 0 17 6023.69 947 24 Mar 2022 59 4 51 1 5 19 6026.38 973 31 Apr 2022 117 13 87 2 21 18 6031.03 1019 52 May 2022 250 33 191 3 35 18 6043.73 1154 141 Jun 2022 185 23 140 4 51 18 6049.59 1221 146 Jul 2022 41 1 54 4 56 20 6047.39 1195 72 Aug 2022 34 1 54 3 47 28 6045.27 1171 58 Sep 2022 32 1 45 2 26 25 6044.58 1163 48 WY 2022 830 76 728 23 250 245 700

Oct 2022 37 1 40 2 9 20 6045.42 1173 40 Nov 2022 26 0 20 1 0 18 6045.52 1174 34 Dec 2022 25 0 20 1 0 18 6045.61 1175 34 Jan 2023 22 0 18 1 0 18 6045.49 1173 33 Feb 2023 30 0 26 1 0 17 6046.24 1182 29 Mar 2023 96 9 79 1 5 18 6050.89 1236 42 Apr 2023 152 18 113 2 21 18 6056.86 1308 68 May 2023 266 35 193 4 35 18 6067.37 1444 159

Unreg Regulated Evap PowerPlant Bypass Total Reservoir Elev Bank EOM Lees Inflow Inflow Losses Release Release Release End of Month Storage Storage Ferry Gage Date (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) * Jun 2020 1453 1293 45 650 0 650 3610.62 5077 12793 663 H Jul 2020 290 332 53 750 0 750 3606.25 5042 12357 774 I Aug 2020 -20 200 51 833 0 833 3599.72 4992 11723 865 S Sep 2020 47 267 46 602 0 602 3595.98 4963 11371 628 WY 2020 5848 6543 372 8230 0 8230 8425

T Oct 2020 92 246 31 640 0 640 3591.72 4932 10977 667 O Nov 2020 261 279 29 640 0 640 3587.72 4903 10615 650 R Dec 2020 168 217 23 719 0 719 3582.21 4864 10130 716 I Jan 2021 198 239 7 763 0 763 3576.45 4825 9638 757 C Feb 2021 201 235 7 675 0 675 3571.46 4792 9226 670 A Mar 2021 297 299 11 700 0 700 3566.71 4761 8844 698 L Apr 2021 289 279 17 628 0 628 3562.37 4734 8504 635 * May 2021 543 495 20 624 0 624 3560.57 4723 8366 650

Jun 2021 750 630 31 652 0 652 3559.94 4719 8318 671 Jul 2021 218 345 36 766 0 766 3554.27 4685 7895 789 Aug 2021 150 281 34 801 0 801 3547.13 4644 7382 825 Sep 2021 200 300 30 623 0 623 3542.42 4618 7055 639 WY 2021 3367 3845 276 8230 0 8230 8368

Oct 2021 325 381 20 480 0 480 3540.79 4609 6945 492 Nov 2021 350 345 20 500 0 500 3538.37 4596 6782 503 Dec 2021 300 321 16 600 0 600 3534.23 4574 6510 603 Jan 2022 270 294 4 723 0 723 3527.94 4542 6109 732 Feb 2022 260 270 4 639 0 639 3522.31 4515 5763 650 Mar 2022 425 356 7 675 0 675 3517.22 4491 5461 691 Apr 2022 660 515 11 601 0 601 3515.68 4483 5371 619 May 2022 1680 1397 14 599 0 599 3527.75 4541 6097 618 Jun 2022 2430 1961 25 628 0 628 3546.08 4638 7308 647 Jul 2022 870 755 33 709 0 709 3546.26 4639 7321 732 Aug 2022 370 471 32 758 0 758 3541.97 4616 7025 782 Sep 2022 360 471 29 568 0 568 3540.24 4606 6907 585 WY 2022 8300 7536 216 7480 0 7480 7655

Oct 2022 453 506 20 480 0 480 3540.31 4607 6912 492 Nov 2022 451 451 20 500 0 500 3539.37 4602 6849 503 Dec 2022 364 410 16 600 0 600 3536.50 4586 6659 603 Jan 2023 355 400 4 723 0 723 3531.83 4562 6355 732 Feb 2023 399 421 5 639 0 639 3528.59 4546 6149 650 Mar 2023 653 561 8 675 0 675 3526.79 4537 6037 691 Apr 2023 945 768 12 601 0 601 3529.08 4548 6180 619 May 2023 2213 1871 16 599 0 599 3546.58 4641 7343 618

Glen Side Inflow Evap Total Total SNWP Downstream Bank Reservoir Elev EOM Release Glen to Hoover Losses Release Release Use Requirements Storage End of Month Storage Date (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 CFS) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (Ft) (1000 Ac-Ft) * Jun 2020 650 19 55 973 16.4 31 978 689 1087.07 10605 H Jul 2020 750 35 68 902 14.7 36 906 676 1084.63 10398 I Aug 2020 833 69 72 847 13.8 36 850 673 1084.04 10349 S Sep 2020 602 56 59 646 10.9 28 651 668 1083.21 10279 WY 2020 8230 863 553 8263 255 8267

T Oct 2020 640 35 43 730 11.9 21 734 661 1081.88 10167 O Nov 2020 640 56 42 714 12.0 11 718 656 1081.07 10100 R Dec 2020 719 59 37 497 8.1 8 500 671 1083.72 10322 I Jan 2021 763 72 30 593 9.6 11 616 683 1085.95 10510 C Feb 2021 675 55 28 574 10.3 8 581 690 1087.26 10622 A Mar 2021 700 33 31 945 15.4 15 935 675 1084.39 10378 L Apr 2021 628 37 38 1057 17.8 23 1056 647 1079.30 9953 * May 2021 624 28 43 1086 17.7 28 1077 616 1073.50 9480

Jun 2021 652 29 51 1001 16.8 27 1001 592 1068.82 9106 Jul 2021 766 64 63 879 14.3 32 879 583 1067.09 8970 Aug 2021 801 81 67 782 12.7 34 782 583 1067.10 8971 Sep 2021 623 71 55 708 11.9 29 708 577 1065.92 8879 WY 2021 8230 621 529 9566 247 9586

Oct 2021 480 58 40 577 9.4 23 577 571 1064.69 8783 Nov 2021 500 71 39 604 10.1 12 604 566 1063.68 8705 Dec 2021 600 67 34 504 8.2 6 504 573 1065.18 8821 Jan 2022 723 95 28 528 8.6 11 528 589 1068.20 9057 Feb 2022 639 97 26 569 10.3 9 569 597 1069.76 9181 Mar 2022 675 111 29 913 14.9 15 913 586 1067.72 9019 Apr 2022 601 81 36 998 16.8 17 998 564 1063.27 8673 May 2022 599 50 40 970 15.8 21 970 540 1058.56 8315 Jun 2022 628 29 48 927 15.6 29 927 519 1054.20 7989 Jul 2022 709 64 59 818 13.3 33 818 511 1052.44 7860 Aug 2022 758 81 62 787 12.8 34 787 508 1051.88 7820 Sep 2022 568 71 51 701 11.8 31 701 500 1050.03 7685 WY 2022 7480 876 492 8895 240 8895

Oct 2022 480 58 37 547 8.9 26 547 495 1049.11 7619 Nov 2022 500 71 37 663 11.1 15 663 486 1047.23 7484 Dec 2022 600 67 31 556 9.0 10 556 491 1048.14 7549 Jan 2023 723 95 26 518 8.4 11 518 507 1051.56 7796 Feb 2023 639 97 24 548 9.9 9 548 516 1053.56 7942 Mar 2023 675 111 27 891 14.5 16 891 507 1051.66 7803 Apr 2023 601 81 33 977 16.4 17 977 486 1047.14 7478 May 2023 599 50 37 955 15.5 21 955 464 1042.29 7136

Hoover Side Evap Power Spill Total Total Reservoir Elev EOM Release Inflow Losses Release Release Release Release End of Month Storage Date (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 CFS) (Ft) (1000 Ac-Ft) * Jun 2020 973 -10 25 932 0 933 15.7 643.34 1708 H Jul 2020 902 -4 25 884 0 884 14.4 642.91 1696 I Aug 2020 847 -10 23 822 0 822 13.4 642.61 1688 S Sep 2020 646 1 18 791 0 791 13.3 636.50 1525 WY 2020 8263 -50 198 8063 0 8063

T Oct 2020 730 -12 15 725 0 725 11.8 635.65 1503 O Nov 2020 714 -34 11 560 0 560 9.4 639.83 1613 R Dec 2020 497 -6 9 509 0 509 8.3 638.82 1586 I Jan 2021 593 -3 10 475 0 474 7.7 642.71 1691 C Feb 2021 574 -17 10 550 0 550 9.9 642.63 1688 A Mar 2021 945 -10 13 920 0 920 15.0 642.69 1690 L Apr 2021 1057 -21 17 1028 0 1028 17.3 642.37 1682 * May 2021 1086 -10 22 1055 0 1055 17.2 642.32 1680

Jun 2021 1001 -13 25 943 0 943 15.9 643.00 1699 Jul 2021 879 -10 25 858 0 858 13.9 642.50 1685 Aug 2021 782 -11 23 762 0 762 12.4 642.00 1671 Sep 2021 708 -11 18 759 0 759 12.8 639.01 1591 WY 2021 9566 -158 197 9144 0 9143

Oct 2021 577 -11 15 707 0 707 11.5 633.00 1434 Nov 2021 604 -23 10 519 0 519 8.7 635.00 1486 Dec 2021 504 -11 9 365 0 365 5.9 639.51 1604 Jan 2022 528 -17 10 439 0 439 7.1 641.80 1666 Feb 2022 569 -9 10 550 0 550 9.9 641.80 1666 Mar 2022 913 -7 13 859 0 859 14.0 643.05 1700 Apr 2022 998 -8 17 974 0 974 16.4 643.00 1699 May 2022 970 -8 22 940 0 940 15.3 643.00 1699 Jun 2022 927 -13 25 889 0 889 14.9 643.00 1699 Jul 2022 818 -10 25 810 0 810 13.2 642.00 1671 Aug 2022 787 -11 23 753 0 753 12.2 642.00 1671 Sep 2022 701 -11 18 725 0 725 12.2 640.01 1617 WY 2022 8895 -138 197 8532 0 8532

Oct 2022 547 -11 15 704 0 704 11.4 633.00 1434 Nov 2022 663 -23 10 579 0 579 9.7 635.00 1486 Dec 2022 556 -11 9 417 0 417 6.8 639.51 1604 Jan 2023 518 -17 10 430 0 430 7.0 641.80 1666 Feb 2023 548 -9 10 529 0 529 9.5 641.80 1666 Mar 2023 891 -7 13 837 0 837 13.6 643.05 1700 Apr 2023 977 -8 17 954 0 954 16.0 643.00 1699 May 2023 955 -8 22 925 0 925 15.0 643.00 1699

Davis Side Evap Total Total MWD CAP Reservoir Elev EOM Flow To Flow To Release Inflow Losses Release Release Diversion Diversion End of Month Storage Mexico Mexico Date (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 CFS) (1000 Ac-Ft) (1000 Ac-Ft) (Ft) (1000 Ac-Ft) (1000 Ac-Ft) (1000 CFS) * Jun 2020 933 -5 15 700 11.8 94 103 447.85 577 137 2.3 H Jul 2020 884 3 17 700 11.4 95 69 447.58 572 151 2.4 I Aug 2020 822 2 17 649 10.6 79 61 448.03 581 127 2.1 S Sep 2020 791 4 15 542 9.1 92 164 446.61 554 111 1.9 WY 2020 8063 98 139 6041 631 1319 1494

T Oct 2020 725 21 12 448 7.3 94 164 447.77 576 66 1.1 O Nov 2020 560 20 9 357 6.0 92 123 447.50 571 92 1.5 R Dec 2020 509 9 7 286 4.7 95 145 446.46 551 90 1.5 I Jan 2021 474 13 6 256 4.2 70 124 447.88 578 122 2.0 C Feb 2021 550 -2 8 430 7.7 0 111 447.56 572 124 2.2 A Mar 2021 920 2 9 663 10.8 99 149 447.28 566 179 2.9 L Apr 2021 1028 2 11 728 12.2 102 163 448.04 581 167 2.8 * May 2021 1055 -2 13 746 12.1 107 168 448.51 590 137 2.2

Jun 2021 943 6 15 728 12.2 104 89 448.50 589 130 2.2 Jul 2021 858 15 17 685 11.1 108 61 448.00 580 131 2.1 Aug 2021 762 15 17 598 9.7 102 58 447.50 571 92 1.5 Sep 2021 759 14 15 522 8.8 98 128 447.50 570 103 1.7 WY 2021 9143 113 139 6448 1070 1485 1433

Oct 2021 707 21 12 469 7.6 102 141 447.50 571 71 1.2 Nov 2021 519 18 9 330 5.5 96 98 447.50 571 94 1.6 Dec 2021 365 20 7 225 3.7 99 69 446.50 552 94 1.5 Jan 2022 439 17 6 302 4.9 97 47 446.50 552 138 2.2 Feb 2022 550 7 8 398 7.2 24 121 446.50 552 124 2.2 Mar 2022 859 7 9 619 10.1 97 129 446.70 555 147 2.4 Apr 2022 974 11 11 707 11.9 94 125 448.70 593 147 2.5 May 2022 940 9 13 692 11.3 97 135 448.70 593 110 1.8 Jun 2022 889 6 16 697 11.7 94 75 448.70 593 116 2.0 Jul 2022 810 15 17 672 10.9 97 40 448.00 580 123 2.0 Aug 2022 753 15 17 611 9.9 97 40 447.50 571 101 1.6 Sep 2022 725 14 15 517 8.7 94 103 447.50 570 99 1.7 WY 2022 8532 161 139 6239 1087 1123 1365

Oct 2022 704 21 12 485 7.9 97 125 447.50 571 89 1.4 Nov 2022 579 18 9 367 6.2 94 122 447.50 571 115 1.9 Dec 2022 417 20 7 259 4.2 97 89 446.50 552 110 1.8 Jan 2023 430 17 6 308 5.0 86 42 446.50 552 136 2.2 Feb 2023 529 7 8 400 7.2 14 108 446.50 552 122 2.2 Mar 2023 837 7 9 622 10.1 86 115 446.70 555 145 2.4 Apr 2023 954 11 11 711 12.0 83 112 448.70 593 144 2.4 May 2023 925 9 13 702 11.4 86 120 448.70 593 108 1.8

Power Power Reservoir Elev EOM Change In Hoover Hoover Gen Hoover Percent of Release Release End of Month Storage Storage Static Head Capacity Gross Energy Units Date (1000 Ac-Ft) (1000 CFS) (Ft) (1000 Ac-Ft) (1000 Ac-Ft) (Ft) MW MKWH Available KWH/AF * Jun 2020 973 16.4 1087.07 10605 -366 438.87 1511.0 383.4 94 393.9 H Jul 2020 902 14.7 1084.63 10398 -207 437.22 1502.1 351.6 94 389.9 I Aug 2020 847 13.8 1084.04 10349 -50 438.65 1502.1 328.8 94 388.2 S Sep 2020 646 10.9 1083.21 10279 -70 441.07 1264.0 250.3 81 387.6 WY 2020 8263 3256.3

T Oct 2020 730 11.9 1081.88 10167 -111 439.76 1154.0 284.7 74 390.2 O Nov 2020 714 12.0 1081.07 10100 -68 437.77 1303.0 275.5 85 385.6 R Dec 2020 497 8.0 1083.72 10322 222 442.26 1266.0 191.3 81 384.9 I Jan 2021 593 9.6 1085.95 10510 189 440.07 1191.0 233.1 74 393.3 C Feb 2021 574 10.3 1087.26 10622 112 440.33 1080.0 225.4 67 392.4 A Mar 2021 945 15.4 1084.39 10378 -244 437.56 1109.0 376.2 70 398.0 L Apr 2021 1057 17.8 1079.30 9953 -425 427.23 1086.9 415.5 70 393.2 * May 2021 1086 17.7 1073.50 9480 -473 423.99 1042.9 433.7 69 399.5

Jun 2021 1001 16.8 1068.82 9106 -374 417.99 1451.0 374.2 100 374.0 Jul 2021 879 14.3 1067.09 8970 -136 414.76 1451.0 332.5 100 378.0 Aug 2021 782 12.7 1067.10 8971 1 414.23 1434.0 291.5 100 373.0 Sep 2021 708 11.9 1065.92 8879 -92 414.79 1434.0 262.5 100 370.8 WY 2021 9566 3696.1

Oct 2021 577 9.4 1064.69 8783 -95 416.79 1293.0 212.8 91 368.8 Nov 2021 604 10.1 1063.68 8705 -78 420.72 870.9 229.7 62 380.5 Dec 2021 504 8.2 1065.18 8821 116 418.54 921.1 190.8 65 378.8 Jan 2022 528 8.6 1068.20 9057 236 419.30 843.0 196.2 58 371.9 Feb 2022 569 10.3 1069.76 9181 124 420.12 938.9 216.2 65 379.8 Mar 2022 913 14.9 1067.72 9019 -161 417.31 1220.0 344.2 85 376.8 Apr 2022 998 16.8 1063.27 8673 -346 414.01 1150.0 373.4 82 374.3 May 2022 970 15.8 1058.56 8315 -358 409.60 1108.0 361.9 81 373.1 Jun 2022 927 15.6 1054.20 7989 -325 403.13 1332.0 336.2 100 362.6 Jul 2022 818 13.3 1052.44 7860 -129 400.43 1315.0 295.7 100 361.5 Aug 2022 787 12.8 1051.88 7820 -41 399.61 1315.0 282.6 100 359.3 Sep 2022 701 11.8 1050.03 7685 -134 399.06 1298.0 249.2 100 355.6 WY 2022 8895 3288.8

Oct 2022 547 8.9 1049.11 7619 -66 399.97 1281.0 192.0 100 351.2 Nov 2022 663 11.1 1047.23 7484 -135 402.42 1174.3 237.6 85 358.3 Dec 2022 556 9.0 1048.14 7549 66 400.24 1123.2 196.6 81 353.8 Jan 2023 518 8.4 1051.56 7796 247 400.91 1040.4 188.2 74 363.2 Feb 2023 548 9.9 1053.56 7942 146 403.74 927.7 198.8 65 363.1 Mar 2023 891 14.5 1051.66 7803 -139 401.33 1195.7 327.2 85 367.1 Apr 2023 977 16.4 1047.14 7478 -325 398.05 1134.5 349.1 82 357.3 May 2023 955 15.5 1042.29 7136 -342 393.53 1098.3 339.9 81 355.9

Power Power Reservoir Elev EOM Change In Davis Davis Gen Davis Percent of Release Release End of Month Storage Storage Static Head Capacity Gross Energy Units Date (1000 Ac-Ft) (1000 CFS) (Ft) (1000 Ac-Ft) (1000 Ac-Ft) (Ft) MW MKWH Available KWH/AF * Jun 2020 932 15.7 643.34 1708 5 140.36 255.0 117.3 100 125.8 H Jul 2020 884 14.4 642.91 1696 -12 139.88 255.0 112.0 100 126.7 I Aug 2020 822 13.4 642.61 1688 -8 141.10 255.0 104.0 100 126.5 S Sep 2020 791 13.3 636.50 1525 -163 133.32 255.0 98.1 100 123.9 WY 2020 8063 1015.1

T Oct 2020 725 11.8 635.65 1503 -22 134.17 215.5 91.1 85 125.5 O Nov 2020 560 9.4 639.83 1613 110 140.14 168.3 67.8 66 121.2 R Dec 2020 509 8.3 638.82 1586 -27 135.77 153.0 65.2 60 128.2 I Jan 2021 475 7.7 642.71 1691 105 143.89 156.3 55.9 61 117.7 C Feb 2021 550 9.9 642.63 1688 -2 141.55 156.5 71.1 61 129.2 A Mar 2021 920 15.0 642.69 1690 2 138.82 161.2 117.8 63 128.0 L Apr 2021 1028 17.3 642.37 1682 -9 138.42 253.3 130.1 99 126.6 * May 2021 1055 17.2 642.32 1680 -2 139.64 255.0 133.2 100 126.2

Jun 2021 943 15.9 643.00 1699 19 138.62 255.0 117.8 100 124.9 Jul 2021 858 13.9 642.50 1685 -14 139.37 255.0 107.7 100 125.6 Aug 2021 762 12.4 642.00 1671 -14 139.45 255.0 95.7 100 125.6 Sep 2021 759 12.8 639.01 1591 -81 137.56 255.0 94.1 100 123.9 WY 2021 9144 1147.5

Oct 2021 707 11.5 633.00 1434 -156 133.54 227.0 85.1 89 120.3 Nov 2021 519 8.7 635.00 1486 51 132.68 159.8 62.1 63 119.5 Dec 2021 365 5.9 639.51 1604 118 137.20 154.7 45.2 61 123.6 Jan 2022 439 7.1 641.80 1666 62 140.04 156.3 55.4 61 126.2 Feb 2022 550 9.9 641.80 1666 0 139.98 156.6 69.4 61 126.1 Mar 2022 859 14.0 643.05 1700 34 139.04 194.1 107.6 76 125.3 Apr 2022 974 16.4 643.00 1699 -2 138.81 249.9 121.9 98 125.1 May 2022 940 15.3 643.00 1699 0 139.16 255.0 117.8 100 125.4 Jun 2022 889 14.9 643.00 1699 0 139.28 255.0 111.5 100 125.5 Jul 2022 810 13.2 642.00 1671 -27 139.41 255.0 101.7 100 125.6 Aug 2022 753 12.2 642.00 1671 0 139.25 255.0 94.5 100 125.5 Sep 2022 725 12.2 640.01 1617 -54 138.28 255.0 90.3 100 124.6 WY 2022 8532 1062.5

Oct 2022 704 11.4 633.00 1434 -183 134.06 227.0 85.0 89 120.8 Nov 2022 579 9.7 635.00 1486 51 132.25 159.8 69.0 63 119.2 Dec 2022 417 6.8 639.51 1604 118 136.80 154.7 51.4 61 123.2 Jan 2023 430 7.0 641.80 1666 62 140.11 156.3 54.3 61 126.2 Feb 2023 529 9.5 641.80 1666 0 140.15 156.6 66.7 61 126.3 Mar 2023 837 13.6 643.05 1700 34 139.17 194.1 105.0 76 125.4 Apr 2023 954 16.0 643.00 1699 -2 138.92 249.9 119.4 98 125.2 May 2023 925 15.0 643.00 1699 0 139.24 255.0 116.0 100 125.4

Power Power Reservoir Elev EOM Change In Parker Parker Gen Parker Percent of Release Release End of Month Storage Storage Static Head Capacity Gross Energy Units Date (1000 Ac-Ft) (1000 CFS) (Ft) (1000 Ac-Ft) (1000 Ac-Ft) (Ft) MW MKWH Available KWH/AF * Jun 2020 700 11.8 447.85 577 6 79.56 120.0 48.8 100 69.7 H Jul 2020 700 11.4 447.58 572 -5 81.49 120.0 48.6 100 69.3 I Aug 2020 649 10.6 448.03 581 8 80.50 120.0 45.0 100 69.3 S Sep 2020 542 9.1 446.61 554 -27 78.70 120.0 37.7 100 69.6 WY 2020 6041 416.0

T Oct 2020 448 7.3 447.77 576 22 81.85 90.0 32.2 75 71.8 O Nov 2020 357 6.0 447.50 571 -5 81.16 90.0 23.9 75 66.9 R Dec 2020 286 4.7 446.46 551 -19 80.52 118.1 19.7 98 68.9 I Jan 2021 256 4.2 447.88 578 26 82.16 97.7 16.1 81 62.9 C Feb 2021 430 7.7 447.56 572 -6 79.82 97.2 29.8 81 69.3 A Mar 2021 663 10.8 447.28 566 -5 79.45 120.0 46.2 100 69.7 L Apr 2021 728 12.2 448.04 581 14 79.77 120.0 50.2 100 68.9 * May 2021 746 12.1 448.51 590 9 80.39 120.0 52.0 100 69.7

Jun 2021 728 12.2 448.50 589 0 75.86 120.0 48.4 100 66.5 Jul 2021 685 11.1 448.00 580 -9 75.61 120.0 45.3 100 66.1 Aug 2021 598 9.7 447.50 571 -10 75.13 120.0 39.1 100 65.4 Sep 2021 522 8.8 447.50 570 0 74.89 120.0 33.9 100 65.0 WY 2021 6448 436.8

Oct 2021 469 7.6 447.50 571 0 76.14 92.9 30.9 77 65.8 Nov 2021 330 5.5 447.50 571 0 76.19 92.0 21.3 77 64.7 Dec 2021 225 3.7 446.50 552 -19 74.82 110.3 13.9 92 61.7 Jan 2022 302 4.9 446.50 552 0 75.12 93.9 19.1 78 63.5 Feb 2022 398 7.2 446.50 552 0 75.15 93.2 25.9 78 64.9 Mar 2022 619 10.1 446.70 555 4 74.01 120.0 40.0 100 64.7 Apr 2022 707 11.9 448.70 593 38 75.08 120.0 46.6 100 65.8 May 2022 692 11.3 448.70 593 0 76.05 120.0 46.0 100 66.4 Jun 2022 697 11.7 448.70 593 0 76.05 120.0 46.4 100 66.5 Jul 2022 672 10.9 448.00 580 -13 75.71 120.0 44.4 100 66.1 Aug 2022 611 9.9 447.50 571 -10 75.13 120.0 40.0 100 65.5 Sep 2022 517 8.7 447.50 570 0 74.89 120.0 33.6 100 65.0 WY 2022 6239 408.1

Oct 2022 485 7.9 447.50 571 0 76.19 91.9 32.0 77 66.0 Nov 2022 367 6.2 447.50 571 0 76.14 93.0 23.9 78 65.1 Dec 2022 259 4.2 446.50 552 -19 74.77 111.3 16.2 93 62.4 Jan 2023 308 5.0 446.50 552 0 75.12 93.9 19.6 78 63.6 Feb 2023 400 7.2 446.50 552 0 75.10 94.3 26.0 79 64.9 Mar 2023 622 10.1 446.70 555 4 74.01 120.0 40.2 100 64.7 Apr 2023 711 12.0 448.70 593 38 75.08 120.0 46.8 100 65.8 May 2023 702 11.4 448.70 593 0 76.05 120.0 46.7 100 66.5

Glen Flaming Blue Morrow Crystal Fontenelle Canyon Gorge Mesa Point Reservoir Reservoir Date 1000 MWHR 1000 MWHR 1000 MWHR 1000 MWHR 1000 MWHR 1000 MWHR * Jun 2020 290 58 24 28 18 8 H Jul 2020 335 35 27 32 18 9 I Aug 2020 367 43 28 32 19 7 S Sep 2020 262 37 23 28 11 2 Summer 2020 1806 254 146 182 102 37 T Oct 2020 277 24 18 22 9 0 O Nov 2020 275 20 5 7 3 1 R Dec 2020 304 24 5 7 3 3 I Jan 2021 319 24 5 6 3 3 C Feb 2021 278 21 5 6 2 3 A Mar 2021 285 20 8 11 6 3 Winter 2021 1738 132 46 60 25 14 L Apr 2021 254 19 20 28 17 3 * May 2021 249 36 24 32 20 3 Jun 2021 250 28 20 32 17 3 Jul 2021 291 17 26 36 18 3 Aug 2021 300 17 21 30 15 4 Sep 2021 230 17 19 28 14 3 Summer 2021 1572 134 131 185 101 19 Oct 2021 176 17 17 26 13 3 Nov 2021 182 17 4 6 4 2 Dec 2021 217 17 4 7 4 3 Jan 2022 258 17 4 7 4 3 Feb 2022 225 16 4 6 3 3 Mar 2022 235 17 5 8 5 3 Winter 2022 1293 102 38 61 32 18 Apr 2022 206 17 10 18 10 3 May 2022 208 22 42 66 23 4 Jun 2022 228 42 15 25 17 7 Jul 2022 262 20 20 27 15 8 Aug 2022 279 34 22 29 15 5 Sep 2022 207 34 20 27 14 5 Summer 2022 1390 169 129 193 95 32 Oct 2022 175 26 19 26 13 5 Nov 2022 182 25 4 6 4 5 Dec 2022 217 33 4 6 4 5 Jan 2023 259 33 4 6 4 5 Feb 2023 226 30 4 6 3 4 Mar 2023 239 29 5 7 5 4 Winter 2023 1059 146 35 50 28 23 Apr 2023 212 28 11 17 10 4 May 2023 216 38 48 67 23 6

Flaming Blue Lake Upper Basin Lake Flaming Blue Tot or Max Lake Lake BOM Space Mead Mead Sys Gorge Mesa Navajo Powell Total Mead Total Gorge Mesa Navajo Allow Powell Mead Total Required Sched Rel FC Rel Cont Date KAF KAF KAF KAF KAF KAF KAF KAF KAF KAF KAF KAF KAF KAF KAF KAF KAF 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 * * * * Jun 2021 789 480 596 15956 17820 18140 35961 93 1 32 126 15956 18140 34222 1500 1001 0 24.8 Jul 2021 722 437 606 16004 17768 18514 36282 15 -50 -13 -48 16004 18514 34469 1500 879 0 24.1 * * * * C R E D I T A B L E S P A C E * * * * Aug 2021 721 482 678 16427 18309 18650 36958 721 482 678 1881 16427 18650 36958 1500 782 0 23.4 Sep 2021 749 522 727 16940 18938 18649 37588 749 522 727 1998 16940 18649 37588 2270 708 0 22.8 Oct 2021 781 561 747 17267 19357 18741 38098 781 561 747 2090 17267 18741 38098 3040 577 0 22.4 Nov 2021 800 604 747 17377 19528 18837 38365 800 604 747 2151 17377 18837 38365 3810 604 0 22.2 Dec 2021 811 598 745 17540 19694 18915 38609 811 598 745 2154 17540 18915 38609 4580 504 0 22.1 Jan 2022 837 595 749 17812 19993 18799 38792 837 595 749 2181 17812 18799 38792 5350 528 0 22.0 * * * * E F F E C T I V E S P A C E * * * * Jan 2022 837 595 749 17812 19993 18799 38792 473 256 426 1156 17812 18799 37767 5350 528 0 22.0 Feb 2022 860 593 755 18213 20422 18563 38985 494 256 432 1182 18213 18563 37959 1500 569 0 21.7 Mar 2022 876 592 755 18559 20782 18439 39221 507 256 431 1193 18559 18439 38192 1500 913 0 21.4 Apr 2022 849 584 729 18861 21024 18601 39625 475 250 398 1123 18861 18601 38585 1500 998 0 21.1 May 2022 791 570 682 18951 20994 18947 39942 410 235 329 975 18951 18947 38873 1500 970 0 21.7 Jun 2022 698 567 548 18225 20038 19305 39343 307 219 156 682 18225 19305 38213 1500 927 0 23.0 Jul 2022 537 391 481 17014 18422 19631 38053 131 20 34 184 17014 19631 36829 1500 818 0 23.0 * * * * C R E D I T A B L E S P A C E * * * * Aug 2022 425 364 506 17001 18297 19760 38057 425 364 506 1296 17001 19760 38057 1500 787 0 22.5 Sep 2022 470 379 530 17297 18677 19800 38477 470 379 530 1380 17297 19800 38477 2270 701 0 22.1 Oct 2022 535 406 538 17415 18893 19935 38828 535 406 538 1479 17415 19935 38828 3040 547 0 21.8 Nov 2022 569 433 529 17410 18940 20001 38941 569 433 529 1530 17410 20001 38941 3810 663 0 21.6 Dec 2022 598 416 527 17473 19015 20136 39151 598 416 527 1542 17473 20136 39151 4580 556 0 21.6 Jan 2023 663 404 526 17663 19258 20071 39328 663 404 526 1594 17663 20071 39328 5350 518 0 21.5 * * * * E F F E C T I V E S P A C E * * * * Jan 2023 663 404 526 17663 19258 20071 39328 375 254 526 1155 17663 20071 38889 5350 518 0 21.5 Feb 2023 722 394 528 17967 19611 19824 39435 432 244 528 1204 17967 19824 38995 1500 548 0 21.4 Mar 2023 768 384 519 18173 19845 19678 39523 476 235 519 1231 18173 19678 39081 1500 891 0 21.3 Apr 2023 765 363 465 18285 19879 19817 39696 469 214 463 1146 18285 19817 39248 1500 977 0 21.3 May 2023 731 323 393 18142 19589 20142 39731 428 174 367 969 18142 20142 39253 1500 955 0 22.4

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3146 Processed On: 6/11/2021 10:17:40AM