january 24-month study date: january 15, 2020 · the next fontenelle working group meeting is...

January 24-Month Study Date: January 15, 2020

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

Reservoir

December Inflow

(unregulated) (acre-feet)

Percent of Average

(%)

January 13, Midnight Elevation

(feet)

January 13, Midnight Reservoir Storage

(acre-feet) Fontenelle 36,300 113 6,484.85 194,000 Flaming Gorge 43,463 125 6,028.87 3,306,000 Blue Mesa 29,850 108 7,488.71 571,350 Navajo 15,800 63 6,057.57 1,317,000 Powell 352,600 97 3,607.27 12,457,000

_______________________________________________________________________ Expected Operations The operation of Lake Powell and Lake Mead in this January 2020 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 2020 Annual Operating Plan (AOP). Pursuant to the Interim Guidelines, the August 2019 24-Month Study projections of the January 1, 2020, system storage and reservoir water surface elevations set the operational tier for the coordinated operation of Lake Powell and Lake Mead during 2020. Consistent with Section 6.B of the Interim Guidelines, Lake Powell’s operations in water year 2020 will be governed by the Upper Elevation Balancing Tier, with an initial water year release volume of 8.23 maf and the potential for an April adjustment to equalization or balancing releases in April 2020. Based on the most probable inflow forecast, this January 24-Month Study projects an annual release of 8.23 maf in water year 2020. 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 2020. 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 in calendar year 2020. The 2020 AOP is available for download at:

https://www.usbr.gov/lc/region/g4000/aop/AOP20.pdf. The Interim Guidelines are available for download at: https://www.usbr.gov/lc/region/programs/strategies/RecordofDecision.pdf. The Colorado River DCPs are available for download at: https://www.usbr.gov/lc/region/programs/dcp.html. Fontenelle Reservoir – As of January 7, 2020, the Fontenelle Reservoir pool elevation is 6485.81 feet, which amounts to 58 percent of live storage capacity. Inflows for the month of December totaled 36,283 acre-feet (af) or 113 percent of average. Releases remain at 1050 cfs. The January final forecast for unregulated inflows into Fontenelle for the next three months projects near average conditions. January, February, and March inflow volumes amount to 32,000 af (106 percent of average), 30,000 af (108 percent of average), and 48,000 af (91 percent of average), respectively. The January water supply forecast of the April through July inflow volume into the Fontenelle Reservoir is 570,000 acre-feet (79 percent of average). Current snowpack is 105 percent of median for the Upper Green Basin. The next Fontenelle Working Group meeting is scheduled for April 22, 2020 from 10:00 a.m. to 12:00 p.m. The meeting is planned to held at the 3 Telephone Canyon Road, Green River, WY 82935. 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 Reservoir – As of January 7, 2020, Flaming Gorge Reservoir pool elevation is 6029.09 feet, which amounts to 88 percent of live storage capacity. Inflows for the month of December 71740 acre-feet (af) or 122 percent of average. The average daily releases are planned to be sustained at 2150 cfs until the beginning of March 2020.

The January final forecast for unregulated inflows into Flaming Gorge for the next three months projects near average conditions. January, February and March forecasted unregulated inflow volumes at 43,000 af (107 percent of average), 46,000 af (103 percent of average), and 100,000 af (98 percent of average), respectively.

The January water supply forecast of the April through July unregulated inflow volume into Flaming Gorge Reservoir is 830,000 acre-feet (85 percent of average). Current snowpack is 105 percent of median for the Upper Green Basin.

Reclamation is planning to hold the Pre-Flaming Gorge Working Group meeting on March 19, 2020 from 10:00 am to 1:00 pm at the Uintah Conference Center in Vernal UT (313 East 200 South). The Flaming Gorge Working Group meeting to review stakeholders comments and input is scheduled for April 16, 2020 from 10:00 a.m. to 1:00 p.m. at Carbon County Event Center, 450 S Fairgrounds Rd, Price, UT 84501, USA.

https://www.usbr.gov/lc/region/g4000/aop/AOP20.pdf

https://www.usbr.gov/lc/region/g4000/aop/AOP20.pdf

https://www.usbr.gov/lc/region/programs/strategies/RecordofDecision.pdf

https://www.usbr.gov/lc/region/programs/strategies/RecordofDecision.pdf

https://www.usbr.gov/lc/region/programs/dcp.html

https://www.usbr.gov/lc/region/programs/dcp.html

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 January 13, 2020 releases from Crystal Dam are approximately 1,100 cfs. Gunnison Tunnel diversions are occurring about every 2 weeks to refill Fairview Reservoir. Flows in the Black Canyon are about 1,060 cfs. Releases from Crystal are projected to remain at about this level until the end of January 2020 when releases likely will be decreased.

Blue Mesa did fill in 2019 and achieved a peak elevation on July 25, 2019 of 7519.15 feet above sea level which corresponded to a storage content of 827,000 af (99 percent of full pool). Since this peak filling, Blue Mesa's elevation has declined to 7488.71 feet above sea level on January 13, 2020 and this trend will continue until about the beginning of April 2020.

The unregulated inflow volume in December to Blue Mesa was 29.0 kaf (108 percent of average). Unregulated Inflow volumes forecasted for Blue Mesa for the next three months (January, February, March) are projected to be: 25,000 af (104 percent of average), 23,000 af (104 percent of average) and 37,000 af (103 percent of average), respectively. The January 24-Month Study is reflective of these new forecasts. The water year unregulated inflow forecast volume for 2020 is 0.851 maf which is 89 percent of average.

The Aspinall Unit Working 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 Working 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.

Meeting notes from past working Group meetings are posted on the Working Group webpage at: https://www.usbr.gov/uc/wcao/water/rsvrs/mtgs/amcurrnt.html.

The next meeting of the Aspinall Unit Working Group will be held on Thursday, January 23, 2020 at 1:00 pm at the Holiday Inn Express located in Montrose, Colorado.

Navajo Reservoir – On January 6th, the daily average release rate from Navajo Dam was approximately 461 cfs while reservoir inflow (modified unregulated) was averaging approximately 218 cfs. The water surface elevation was 6057.91 feet above sea level. At this elevation the live storage is 1.32 maf (78 percent of live storage capacity) and the active storage is 0.66 maf (63 percent of active storage capacity). NIIP is not diverting. The river flow measured at the Animas River at Farmington USGS gage was at 181 cfs. River flow at the San Juan River at Four Corners USGS gage was 719 cfs.

https://www.usbr.gov/uc/wcao/water/rsvrs/mtgs/amcurrnt.html

https://www.usbr.gov/uc/wcao/water/rsvrs/mtgs/amcurrnt.html

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. Preliminary modified-unregulated inflow into Navajo (inflow adjusted for upstream change in storage, reservoir evaporation and exportation from the basin) in December was 16 kaf (66 percent of average for the month). Forecast modified-unregulated inflow to Navajo over the next three months (January, February, and March) are projected to be: 16 kaf (73 percent of average), 20 kaf (66 percent of average), and 55 kaf (60 percent of average), respectively. The April through July runoff forecasts are as follows: Min Probable: 365,000 af (50 percent of average) Most Probable: 550,000 af (75 percent of average) Max Probable: 955,000 af (130 percent of average) Releases for the fall and winter will be made to target the San Juan River Recovery Implementation Program's recommended baseflow range of 500 cfs to 1000 cfs. Releases will likely range between 300 cfs and 600 cfs throughout the winter. 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 Navajo Unit Coordination Meeting will be held Tuesday, January 21, 2020 at 1:00 pm at the Farmington Civic Center (200 West Arrington, Farmington, NM). Glen Canyon Dam / Lake Powell Current Status The unregulated inflow volume to Lake Powell during December was 353 thousand acre-feet (kaf) (97 percent of average). The release volume from Glen Canyon Dam in December was 700 kaf. The end of December elevation and storage of Lake Powell were 3,609 ft (91 feet from full pool) and 12.60 maf (52 percent of full capacity), respectively. Current Operations The operating tier for water year 2020 (September 2019 through October 2020) was established in August 2019 as the Upper Elevation Balancing Tier, consistent with Section 6.B of the Interim Guidelines. Under this Tier the initial annual water year release volume is 8.23 maf, and if the April 2020 24-Month Study projects the end of water year elevation at Lake Powell to be above 3,575 feet, and the end of water year

elevation at Lake Mead to be below 1,075 feet, Lake Powell operations will shift to balancing releases for the remainder of water year 2020. If the April 2020 24-Month Study projects the end of water year elevation to be above the 2020 Equalization elevation of 3,657 feet Lake Powell operations will shift to Equalization releases for the remainder of water year 2020. Reclamation will schedule operations at Glen Canyon Dam to achieve as practicably as possible the appropriate total annual release volume by September 30, 2020. In January, the release volume will be approximately 760 kaf, with fluctuations anticipated between about 7,740 cfs in the nighttime to about 14,580 cfs in the daytime, and consistent with the Glen Canyon Dam, Record of Decision (dated December 2016). The anticipated release volume for February is 675 kaf with daily fluctuations between approximately 8,300 cfs and 14,370 cfs. The expected release for March is 700 kaf with daily fluctuations between approximately 7,635 cfs and 13,935 cfs. 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 1,200 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 fairly 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 2020 unregulated inflow to Lake Powell, issued on January 6, 2020, by the Colorado Basin River Forecast Center, projects that the most probable (median) unregulated inflow volume this year will be 8.94 maf (82 percent of average). There is significant uncertainty regarding this season’s snowpack development and resulting runoff into Lake Powell. Reclamation updates the minimum and maximum probable forecasts four times a year: January, April, August and October. The January forecast ranges from a minimum probable of 6.4 maf (59 percent of average) to a maximum probable of 12.82 maf (118 percent of average). There is a 10 percent chance that inflows could be higher than the current maximum probable forecast and a 10 percent chance that inflows could be lower than the minimum probable forecast.

Based on the current forecast, the January 24-Month Study projects Lake Powell elevation will end water year 2020 near 3,619.35 feet with approximately 13.69 maf in storage (56 percent of capacity). Note that projections of elevation and storage for water year 2020 have significant uncertainty at this point in the season. Projections of end of water year 2020 elevation and storage using the minimum and maximum probable inflow forecast from January 2020 are 3,598.83 feet (11.64 maf, 48 percent of capacity) and 3,649.60 feet (17.17 maf, 71 percent of capacity), respectively. Under these scenarios, there is a 10 percent chance that inflows will be higher, resulting in higher elevation and storage, and 10 percent chance that inflows will be lower, resulting in lower elevation and storage. The annual release volume from Lake Powell during water year 2020 is projected to be 8.23 maf under the January most, minimum and maximum probable inflow scenarios. Upper Colorado River Basin Hydrology Upper Colorado River Basin regularly experiences significant year to year hydrologic variability. During the 20-year period 2000 to 2019, 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 2000-2019 is the lowest 20-year period since the closure of Glen Canyon Dam in 1963, with an average unregulated inflow of 8.76 maf, or 81 percent 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 2000-2019 period has ranged from a low of 2.64 maf (24 percent of average) in water year 2002 to a high of 15.97 maf (147 percent of average) in water year 2011. In water year 2018 unregulated inflow volume to Lake Powell was 4.6 maf (43 percent of average), the third driest year on record above 2002 and 1977. Under the current most probable forecast, the total water year 2020 unregulated inflow to Lake Powell is projected to be 8.94 maf (82 percent of average). At the beginning of water year 2020, total system storage in the Colorado River Basin was 31.64 maf (53 percent of 59.6 maf total system capacity). This is an increase of 3.64 maf over the total storage at the beginning of water year 2019 when total system storage was 28 maf (47 percent 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 percent of capacity at the beginning of 2000 to the now current level of 53 percent of capacity at the beginning of water year 2020. Based on current inflow forecasts, the current projected end of water year total Colorado Basin reservoir storage for water year 2020 is approximately 31.13 maf (52 percent of total system capacity). The actual end of water year 2020 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 MAILED FROM UPPER COLORADO REGION WATER RESOURCES GROUP ATTENTION UC-430 125 SOUTH STATE STREET, ROOM 8100 SALT LAKE CITY, UT 84138-5571 PHONE 801-524-3709 ******************************************************************************** RUNOFF AND INFLOW PROJECTIONS INTO UPPER BASIN RESERVOIRS ARE PROVIDED BY THE COLORADO RIVER FORECASTING SERVICE THROUGH THE NATIONAL WEATHER SERVICES'S COLORADO BASIN RIVER FORECAST CENTER AND ARE AS FOLLOWS : Obs sep Forecast : aug sep oct nov %Avg dec jan feb : sep oct nov dec %Avg jan feb mar apr-jul %Avg GLDA3:Lake Powell 143 265 404 353 97%: 320/ 360/ 560/ 5900/: 82% GBRW4:Fontenelle 41 51 47 36 113%: 32/ 30/ 48/ 570/: 79% GRNU1:Flaming Gorge 49 53 63 43 123%: 43/ 46/ 100/ 830/: 85% BMDC2:Blue Mesa 32 28 31 29 113%: 25/ 23/ 37/ 590/: 87% MPSC2:Morrow Point 32 29 32 30 108%: 27/ 26/ 41/ 645/: 87% CLSC2:Crystal 36 33 35 34 105%: 31/ 29/ 46/ 725/: 87% TPIC2:Taylor Park 7.1 7.4 4.8 5.4 115%: 4.5/ 4.0/ 4.0/ 85/: 86% VCRC2:Vallecito 8.1 4.4 4.1 3.9 62%: 3.5/ 3/ 5/ 160/: 82% NVRN5:Navajo 3.4 5.8 14.9 15.8 63%: 16/ 20/ 55/ 550/: 75% LEMC2:Lemon 1.44 0.60 0.55 0.65 59%: 0.6/ 0.5/ 1/ 45/: 82% MPHC2:McPhee 5.8 2.5 2.3 3.0 68%: 3.2/ 3.5/ 15.0/ 260/: 88% RBSC2:Ridgway 5.8 4.8 4.7 3.9 87%: 3.7/ 3.7/ 5.5/ 87/: 86% YDLC2:Deerlodge 12.0 22 29 30 118%: 24/ 24/ 75/ 1250/: 101% DRGC2:Durango 19.9 14.5 12.5 10.0 68%: 10.0/ 9.0/ 15.0/ 350/: 84% :

Most Probable Inflow*January 2020 24-Month Study

Fontenelle Reservoir

OPERATION PLAN FOR COLORADO RIVER SYSTEM RESERVOIRS

Reservoir ElevEnd of Month

(Ft)

LiveStorage

(1000 Ac-Ft)

TotalRelease

(1000 Ac-Ft)

RegulatedInflow

(1000 Ac-Ft)Date

EvapLosses

(1000 Ac-Ft)

PowerRelease

(1000 Ac-Ft)

BypassRelease

(1000 Ac-Ft)28 61 6476.81 1501 61 0Jan 2019*26 56 6470.41 1200 55 1Feb 2019H37 61 6464.13 950 61 0Mar 2019I114 71 6474.10 1371 71 0Apr 2019S167 98 6486.46 2041 98 0May 2019T337 278 6494.89 2612 107 171Jun 2019O184 125 6502.48 3173 86 39Jul 2019R57 74 6499.98 2982 74 0Aug 2019I41 66 6496.36 2712 19 47Sep 2019C

1101 107715 799 278WY 2019

51 68 6493.83 2531 61 7Oct 2019A47 63 6491.39 2361 63 0Nov 2019L36 65 6487.01 2081 65 0Dec 2019*

32 65 6481.55 1751 65 0Jan 202030 60 6475.62 1451 60 0Feb 202048 63 6472.23 1290 63 0Mar 202075 71 6472.89 1321 71 0Apr 2020

125 86 6480.50 1701 86 0May 2020245 107 6500.86 3052 103 4Jun 2020125 111 6502.30 3163 102 9Jul 202060 78 6499.61 2962 78 0Aug 202045 65 6496.58 2742 20 45Sep 2020

919 90315 837 66WY 2020

48 66 6493.88 2541 66 0Oct 202042 64 6490.56 2321 64 0Nov 202032 66 6485.16 1971 66 0Dec 202030 66 6478.82 1611 66 0Jan 202128 60 6472.05 1280 60 0Feb 202153 69 6468.13 1110 69 0Mar 202185 79 6469.47 1171 79 0Apr 2021

164 91 6483.69 1881 91 0May 2021299 185 6500.10 3002 103 82Jun 2021178 144 6504.11 3313 101 42Jul 202177 82 6503.08 3232 82 0Aug 202146 77 6498.71 2892 20 58Sep 2021

1081 105015 868 182WY 2021

49 74 6495.07 2631 74 0Oct 202142 60 6492.49 2451 60 0Nov 202132 61 6487.92 2151 61 0Dec 2021

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3109 Processed On: 1/14/2020 1:37:05PM


Flaming Gorge Reservoir



(Ft)

LiveStorage

(1000 Ac-Ft)

TotalRelease

(1000 Ac-Ft)

EvapLosses

(1000 Ac-Ft)Date

BankStorage

(1000 Ac-Ft)

PowerRelease

(1000 Ac-Ft)

UnregInflow

(1000 Ac-Ft)

JensenFlow

(1000 Ac-Ft)

BypassRelease

(1000 Ac-Ft)

RegInflow

(1000 Ac-Ft)124 6026.01124 15431981292 0Jan 2019* 34 68112 6024.69112 14331491272 0Feb 2019H 34 6358 6025.6758 12831851283 0Mar 2019I 74 9971 6028.7971 34133031335 0Apr 2019S 240 19899 6030.7199 56833761368 0May 2019T 252 183

215 6032.55315 950344813911 100Jun 2019O 460 400100 6033.89100 376350214114 0Jul 2019R 227 169109 6032.79109 151345813913 0Aug 2019I 59 76113 6031.57113 134341013711 0Sep 2019C 49 74

1315 1415 335182 100WY 2019 1553 1529

80 6031.1380 10933931367 0Oct 2019A 53 7081 6030.9981 11533871364 0Nov 2019L 63 79

132 6029.43132 16633271342 0Dec 2019* 43 72

132 6027.96132 15632711322 0Jan 2020 43 76124 6026.70124 14832231302 0Feb 2020 46 76114 6026.66114 18932221303 0Mar 2020 100 115110 6026.95110 29532331305 0Apr 2020 130 12674 6029.2274 57433191348 0May 2020 210 171

224 6028.16224 714327813210 0Jun 2020 330 19280 6029.4980 155332913414 0Jul 2020 160 14697 6028.9697 118330913313 0Aug 2020 70 88113 6027.65113 128325913111 0Sep 2020 52 72

1360 1360 286681 0WY 2020 1300 1284

83 6027.2783 11132451317 0Oct 2020 57 7574 6027.1374 10432401303 0Nov 2020 50 7297 6026.3797 12232111292 0Dec 2020 35 6997 6025.7997 12231901282 0Jan 2021 40 7687 6025.4687 11531771282 0Feb 2021 45 7792 6026.0692 16932001293 0Mar 2021 102 11989 6026.9289 30432321305 0Apr 2021 134 12774 6029.2174 60633191348 0May 2021 245 173

237 6028.02313 733327313210 75Jun 2021 390 27688 6029.9188 188334513514 0Jul 2021 210 17699 6029.4899 124332913413 0Aug 2021 89 94

107 6028.68107 126329813311 0Sep 2021 55 871225 1301 282480 75WY 2021 1451 1421

80 6028.5980 11332951337 0Oct 2021 59 8483 6028.1383 11532771323 0Nov 2021 51 69

123 6026.59123 14832191302 0Dec 2021 35 64



Taylor Park Reservoir



(Ft)

LiveStorage

(1000 Ac-Ft)

TotalRelease

(1000 Ac-Ft)

RegulatedInflow

(1000 Ac-Ft)Date* Jan 2019 4 3 9302.92 59H Feb 2019 3 3 9303.16 60I Mar 2019 5 4 9303.75 60S Apr 2019 10 7 9306.14 64T May 2019 21 26 9302.64 59O Jun 2019 68 38 9320.92 89R Jul 2019 47 32 9328.49 103I Aug 2019 15 24 9323.77 94C Sep 2019 7 20 9316.42 81

WY 2019 191 168

A Oct 2019 7 11 9314.38 77L Nov 2019 5 6 9313.69 76* Dec 2019 5 6 9313.35 75

Jan 2020 5 6 9312.44 74Feb 2020 4 6 9311.49 72Mar 2020 4 6 9310.16 70Apr 2020 6 6 9310.19 70

May 2020 25 13 9317.24 82Jun 2020 38 22 9325.86 98Jul 2020 16 22 9322.98 92

Aug 2020 9 19 9317.42 82Sep 2020 7 18 9311.05 72WY 2020 131 140

Oct 2020 6 7 9310.52 71Nov 2020 5 5 9310.50 71Dec 2020 5 5 9310.17 70Jan 2021 4 5 9309.64 69Feb 2021 4 5 9309.07 68Mar 2021 4 5 9308.58 68Apr 2021 9 10 9307.78 66

May 2021 28 14 9316.49 81Jun 2021 42 20 9328.12 102Jul 2021 20 24 9326.42 99

Aug 2021 10 19 9321.86 90Sep 2021 7 18 9316.22 80WY 2021 145 137

Oct 2021 7 12 9313.38 75Nov 2021 5 5 9313.41 75Dec 2021 5 5 9313.10 75



Blue Mesa Reservoir



(Ft)

LiveStorage

(1000 Ac-Ft)

TotalRelease

(1000 Ac-Ft)

RegulatedInflow

(1000 Ac-Ft)Date

EvapLosses

(1000 Ac-Ft)

PowerRelease

(1000 Ac-Ft)

BypassRelease

(1000 Ac-Ft)

UnRegInflow

(1000 Ac-Ft)* Jan 2019 20 17 7438.40 2520 17 020H Feb 2019 20 23 7437.59 2480 23 020I Mar 2019 27 25 7438.01 2500 25 028S Apr 2019 118 33 7453.91 3350 33 0121T May 2019 218 105 7471.68 4471 86 18214O Jun 2019 444 194 7504.14 6961 124 70471R Jul 2019 266 138 7518.61 8232 87 51282I Aug 2019 100 137 7514.39 7841 76 6292C Sep 2019 45 93 7508.84 7361 45 4732

WY 2019 1320 8597 601 2601344

A Oct 2019 32 85 7502.51 6821 82 328L Nov 2019 32 72 7497.65 6420 72 031* Dec 2019 30 84 7490.79 5880 84 029

Jan 2020 27 62 7486.22 5520 62 025Feb 2020 25 40 7484.14 5370 40 023Mar 2020 39 44 7483.43 5310 21 2437Apr 2020 65 67 7483.10 5291 67 065

May 2020 163 162 7483.11 5291 162 0175Jun 2020 234 56 7505.33 7061 56 0250Jul 2020 106 101 7505.71 7091 101 0100

Aug 2020 61 103 7500.60 6661 103 051Sep 2020 48 75 7497.12 6381 75 037WY 2020 861 9508 923 27851

Oct 2020 38 61 7494.19 6141 61 038Nov 2020 31 19 7495.65 6260 19 031Dec 2020 26 57 7491.74 5950 57 026Jan 2021 25 43 7489.38 5770 43 024Feb 2021 23 43 7486.76 5560 43 022Mar 2021 37 45 7485.57 5470 0 4536Apr 2021 78 57 7488.21 5671 0 5777

May 2021 207 37 7508.83 7361 6 31221Jun 2021 239 166 7516.98 8081 166 0261Jul 2021 120 97 7519.30 8292 97 0117

Aug 2021 72 108 7515.24 7921 108 063Sep 2021 48 82 7511.29 7571 82 038WY 2021 946 8189 683 134954

Oct 2021 43 84 7506.53 7161 84 038Nov 2021 31 62 7502.83 6850 62 031Dec 2021 26 104 7493.26 6070 104 026



Morrow Point Reservoir



(Ft)

TotalRelease

(1000 Ac-Ft)

Blue MesaRelease

(1000 Ac-Ft)Date

SideInflow

(1000 Ac-Ft)

PowerRelease

(1000 Ac-Ft)

BypassRelease

(1000 Ac-Ft)

UnregInflow

(1000 Ac-Ft)

LiveStorage

(1000 Ac-Ft)

TotalInflow

(1000 Ac-Ft)17 1077147.001818117 0Jan 2019* 2124 1077147.572323023 0Feb 2019H 2026 1077146.902626125 0Mar 2019I 2947 1137155.1641411533 0Apr 2019S 136

130 1137154.6813112725105 0May 2019T 240235 1137155.1023418641194 0Jun 2019O 512150 1127154.1815115113138 0Jul 2019R 295139 1127153.991391372137 0Aug 2019I 9393 1107151.099660193 0Sep 2019C 32

961 949858102859 0WY 2019 1446

86 1077147.938978185 0Oct 2019A 2972 1087149.157171172 0Nov 2019L 3285 1087149.158585184 0Dec 2019* 30

64 1077147.946565262 0Jan 2020 2743 1077147.944343340 0Feb 2020 2648 1077147.944848444 0Mar 2020 4177 1077147.9477771067 0Apr 2020 75182 1077147.9418218220162 0May 2020 19576 1077147.9476762056 0Jun 2020 270106 1077147.941061065101 0Jul 2020 105106 1077147.941061063103 0Aug 2020 5477 1077147.947777275 0Sep 2020 39

1022 1024101372950 0WY 2020 923

63 1077147.946363261 0Oct 2020 4021 1077147.942121219 0Nov 2020 3359 1077147.945959257 0Dec 2020 2846 1077147.944646243 0Jan 2021 2746 1077147.944646343 0Feb 2021 2549 1077147.944949445 0Mar 2021 4069 1077147.9469691157 0Apr 2021 8863 1077147.9463632637 0May 2021 247186 1077147.9418618620166 0Jun 2021 281104 1077147.94104104697 0Jul 2021 123111 1077147.941111113108 0Aug 2021 6785 1077147.948585382 0Sep 2021 41902 90290284818 0WY 2021 1039

86 1077147.948686384 0Oct 2021 4164 1077147.946464262 0Nov 2021 33106 1077147.941061062104 0Dec 2021 28



Crystal Reservoir



(Ft)

LiveStorage

(1000 Ac-Ft)

TotalRelease

(1000 Ac-Ft)

MorrowRelease

(1000 Ac-Ft)Date

TotalInflow

(1000 Ac-Ft)

BypassRelease

(1000 Ac-Ft)

Below TunnelFlow

(1000 Ac-Ft)

UnregInflow

(1000 Ac-Ft)

TunnelFlow

(1000 Ac-Ft)

PowerRelease

(1000 Ac-Ft)

SideInflow

(1000 Ac-Ft)19 16746.5722 20152218 3Jan 2019* 25 49 16748.2626 25162723 17Feb 2019H 24 3

30 06752.7730 29173226 0Mar 2019I 34 555 266753.2955 29175541 0Apr 2019S 150 15108 476759.30153 10519155131 31May 2019T 264 24115 516753.12282 23117280234 73Jun 2019O 558 46121 596746.79178 12415177151 57Jul 2019R 321 26119 646733.35147 8712144139 28Aug 2019I 98 594 616750.6195 33169996 0Sep 2019C 36 4768 3441087 7471091949 210WY 2019 1587 142

92 646749.7592 29169289 0Oct 2019A 33 376 26746.9076 72157571 0Nov 2019L 35 489 06746.4089 86158985 0Dec 2019* 34 4

68 06749.6368 68166965 0Jan 2020 31 446 06749.6346 46164643 0Feb 2020 29 353 56749.6353 48165348 0Mar 2020 46 587 426749.6387 45168777 0Apr 2020 85 10

136 626749.63212 15016212182 76May 2020 225 30111 616749.63111 501611176 0Jun 2020 305 35111 656749.63111 4616111106 0Jul 2020 110 5114 656749.63114 4916114106 0Aug 2020 62 881 556749.6381 26168177 0Sep 2020 43 4

1063 4211140 71411401024 77WY 2020 1038 116

68 306749.6368 38166863 0Oct 2020 44 525 06749.6325 25162521 0Nov 2020 37 464 06749.6364 64166459 0Dec 2020 32 550 06749.6350 50165046 0Jan 2021 31 50 06749.6350 50165046 50Feb 2021 29 4

47 56749.6356 51165649 9Mar 2021 46 681 426749.6381 39168169 0Apr 2021 101 1298 626749.6398 36169863 0May 2021 281 34

132 616749.63220 15916220186 88Jun 2021 315 34118 656749.63118 5316118104 0Jul 2021 138 14119 656749.63119 5416119111 0Aug 2021 75 891 556749.6391 36169185 0Sep 2021 47 6893 3851040 6551040902 146WY 2021 1176 138

92 306749.6392 62169286 0Oct 2021 47 669 06749.6369 69166964 0Nov 2021 38 5111 06749.63111 11116111106 0Dec 2021 32 5



Vallecito Reservoir



(Ft)

LiveStorage

(1000 Ac-Ft)

TotalRelease

(1000 Ac-Ft)

RegulatedInflow

(1000 Ac-Ft)Date* Jan 2019 4 0 7625.50 37H Feb 2019 4 0 7627.67 41I Mar 2019 6 6 7627.39 40S Apr 2019 32 25 7631.32 47T May 2019 58 41 7640.08 64O Jun 2019 160 101 7664.36 124R Jul 2019 69 68 7664.45 124I Aug 2019 20 38 7657.21 105C Sep 2019 8 33 7646.82 79

WY 2019 378 316

A Oct 2019 4 13 7643.13 71L Nov 2019 4 2 7644.14 73* Dec 2019 4 2 7645.07 75

Jan 2020 4 2 7645.77 77Feb 2020 3 2 7646.28 78Mar 2020 5 2 7647.55 81Apr 2020 15 2 7652.92 94

May 2020 50 31 7660.11 113Jun 2020 70 57 7664.82 125Jul 2020 25 41 7658.38 108

Aug 2020 15 38 7649.07 85Sep 2020 14 29 7642.26 69WY 2020 213 220

Oct 2020 14 16 7640.84 66Nov 2020 8 2 7643.41 72Dec 2020 6 2 7645.37 76Jan 2021 5 2 7646.88 80Feb 2021 5 2 7648.15 83Mar 2021 9 2 7650.90 89Apr 2021 23 2 7659.33 111

May 2021 71 58 7664.04 123Jun 2021 70 70 7663.86 123Jul 2021 29 42 7658.89 109

Aug 2021 20 38 7651.55 91Sep 2021 17 30 7646.29 78WY 2021 278 266

Oct 2021 16 17 7645.52 77Nov 2021 9 2 7648.18 83Dec 2021 6 2 7650.04 87



Navajo Reservoir



(Ft)

LiveStorage

(1000 Ac-Ft)

TotalRelease

(1000 Ac-Ft)

AzeteaTunnel Div

(1000 Ac-Ft)Date

RegInflow

(1000 Ac-Ft)

EvapLosses

(1000 Ac-Ft)

NIIPDiversion

(1000 Ac-Ft)

Mod UnregInflow

(1000 Ac-Ft)

FarmingtonFlow

(1000 Ac-Ft)10 8696015.3319 3100013Jan 2019*14 8656014.9016 3711017Feb 2019H113 9556024.6118 62411114Mar 2019I203 11176040.3620 10220224230Apr 2019S215 12796054.4525 13925334270May 2019T376 15016071.44114 38636457491Jun 2019O142 15316073.5660 22847526171Jul 2019R52 14596068.4078 104424640Aug 2019I29 13886063.1367 7129303Sep 2019C

1188 483 1264211261501401WY 2019

15 13626061.0833 466206Oct 2019A13 13486060.0425 4501015Nov 2019L14 13266058.2536 5901016Dec 2019*

14 13166057.4823 3301016Jan 202019 13146057.2920 2901020Feb 202049 13346058.9022 3762355Mar 202089 13736061.9427 6721212115Apr 2020

169 14716069.2931 15136427215May 2020145 15286073.3930 16553522180Jun 202055 14916070.7631 86575140Jul 202049 14416067.1447 76484128Aug 202044 13846062.7973 98263130Sep 2020

675 397 8922532968736WY 2020

38 13806062.5331 5592237Oct 202024 13746062.0230 4701030Nov 202021 13636061.1731 4601025Dec 202018 13506060.1631 4401022Jan 202127 13486060.0128 4001030Feb 202177 13876063.0331 5362992Mar 2021

128 14616068.5830 8222321170Apr 2021227 14616068.60187 33337437277May 2021195 13216057.90277 42853429224Jun 202174 12876055.0947 114574566Jul 202161 12656053.3531 69483245Aug 202154 12616052.9430 62263243Sep 2021

944 781 1374258271061062WY 2021

46 12656053.3531 5992247Oct 202127 12626053.0530 4801034Nov 202121 12516052.1531 4601025Dec 2021



Lake Powell



(Ft)

BankStorage

(1000 Ac-Ft)

TotalRelease

(1000 Ac-Ft)

RegulatedInflow

(1000 Ac-Ft)Date

EvapLosses

(1000 Ac-Ft)

BypassRelease

(1000 Ac-Ft)

LeesFerry Gage(1000 Ac-Ft)

UnregInflow

(1000 Ac-Ft)

EOMStorage

(1000 Ac-Ft)

PowerPlantRelease

(1000 Ac-Ft)804 96293576.34804 81548247303 0Jan 2019* 212730 92613571.89730 74147957339 0Feb 2019H 255791 90493569.28791 798477811574 0Mar 2019I 625720 91983571.12720 734479018899 0Apr 2019S 1242720 103433584.65720 7524881231980 0May 2019T 2511765 129143611.82765 8075087413583 0Jun 2019O 4206857 139333621.60857 8965168572015 0Jul 2019R 2451900 136103618.55900 932514358608 0Aug 2019I 472687 132773615.36687 703511652379 0Sep 2019C 143

8924 9001 924235611787 77WY 2019 12951

625 130343612.99625 633509635397 0Oct 2019A 265626 128553611.23626 630508234466 0Nov 2019L 404750 126043608.74750 756506227506 0Dec 2019* 353

760 123123605.80760 77150398453 0Jan 2020 320675 121003603.64675 68450229455 0Feb 2020 360700 119533602.12700 714501015556 0Mar 2020 560630 120593603.21630 645501823767 0Apr 2020 840630 127743610.43630 6415076281430 0May 2020 1700650 140033622.25650 6615174472024 0Jun 2020 2400750 141153623.29750 769518359929 0Jul 2020 960835 137943620.29835 852515758547 0Aug 2020 400599 136953619.35599 612514953544 0Sep 2020 375

8230 8230 83673969076 0WY 2020 8936

640 135673618.14640 650513937539 0Oct 2020 484640 133793616.34640 641512435472 0Nov 2020 460720 131153613.78720 726510328462 0Dec 2020 363860 127233609.93860 87150728446 0Jan 2021 361750 124413607.11750 75950499455 0Feb 2021 393800 122583605.25800 814503415617 0Mar 2021 665710 124063606.75710 725504624893 0Apr 2021 1056710 135473617.95710 7215137291972 0May 2021 2343750 152413633.43750 7615273502629 0Jun 2021 2666850 153143634.07850 869527963992 0Jul 2021 1091900 149693631.03900 917525163590 0Aug 2021 500670 147763629.31670 684523657519 0Sep 2021 408

9000 9000 913841810586 0WY 2021 10790

640 146783628.43640 650522839574 0Oct 2021 512640 145443627.22640 641521738533 0Nov 2021 473720 143453625.41720 726520130535 0Dec 2021 363



Hoover Dam - Lake Mead



(Ft)

BankStorage

(1000 Ac-Ft)

SNWPUse

(1000 Ac-Ft)

Side InflowGlen to Hoover

(1000 Ac-Ft)Date

EvapLosses

(1000 Ac-Ft)

TotalRelease

(1000 Ac-Ft)

TotalRelease

(1000 CFS)

GlenRelease

(1000 Ac-Ft)

EOMStorage

(1000 Ac-Ft)

DownstreamRequirements(1000 Ac-Ft)

486 104931085.75487 6827.930106804Jan 2019* 8620 106821087.97621 69411.228126730Feb 2019H 6737 108781090.24738 70712.032200791Mar 2019I 13900 107671088.95902 70015.239118720Apr 2019S 15988 105551086.48989 68616.145108720May 2019T 18911 104051084.71912 67615.35469765Jun 2019O 27946 102461082.82946 66615.46720857Jul 2019R 33801 102991083.45802 66913.07164900Aug 2019I 34690 102611083.00696 66711.75958687Sep 2019C 308868889254710879001WY 2019 234

621 102281082.61626 66510.24334625Oct 2019A 25538 103331083.85575 6729.740116626Nov 2019L 13214 108991090.49220 7083.637117750Dec 2019* 6

397 112801094.85397 7336.53183760Jan 2020 9504 114911097.26504 7478.82991675Feb 2020 9935 112801094.86935 73315.23357700Mar 2020 141016 109061090.571016 70917.14049630Apr 2020 21984 105321086.21984 68516.04530630May 2020 28946 101931082.19946 66315.95417650Jun 2020 29835 100981081.05835 65613.66780750Jul 2020 29781 101481081.65781 66012.771100835Aug 2020 30720 100411080.37720 65312.15891599Sep 2020 25849385415488648230WY 2020 236

515 101731081.94515 6618.44282640Oct 2020 24637 101711081.93637 66110.74354640Nov 2020 16459 104201084.89459 6777.53751720Dec 2020 10520 107801089.11520 7018.53183860Jan 2021 9519 110481092.21519 7189.32891750Feb 2021 9983 108871090.35983 70816.03257800Mar 2021 141019 105861086.841019 68817.13949710Apr 2021 21998 102751083.16998 66816.24530710May 2021 29951 100241080.16951 65216.05317750Jun 2021 29823 100351080.29823 65213.46680850Jul 2021 29777 101501081.67777 66012.671100900Aug 2021 30714 101161081.26714 65812.05891670Sep 2021 25891489145467849000WY 2021 245

515 102471082.83515 6668.44382640Oct 2021 24646 102371082.71646 66510.94354640Nov 2021 16478 104671085.45478 6807.83751720Dec 2021 11



Davis Dam - Lake Mohave



(Ft)

EOMStorage

(1000 Ac-Ft)

TotalRelease

(1000 Ac-Ft)

SideInflow

(1000 Ac-Ft)Date

EvapLosses

(1000 Ac-Ft)

PowerRelease

(1000 Ac-Ft)

SpillRelease

(1000 Ac-Ft)

HooverRelease

(1000 Ac-Ft)

TotalRelease

(1000 CFS)6.8 1668641.89418041810-29487Jan 2019*

10.2 1704643.20569056910-6621Feb 2019H12.2 1687642.577490749137738Mar 2019I14.9 1686642.528860886170902Apr 2019S15.2 1707643.32937093722-9989May 2019T14.9 1696642.89886088625-12912Jun 2019O14.5 1712643.48894089525-11946Jul 2019R13.0 1680642.31800080023-11802Aug 2019I12.9 1573638.35767076718-17696Sep 2019C

853908538198-1428892WY 2019

9.6 1572638.28589058915-24626Oct 2019A7.7 1675642.13457045711-4575Nov 2019L4.0 1638640.77247024790220Dec 2019*

5.6 1666641.80343034310-16397Jan 20208.3 1671642.00475047510-13504Feb 202014.3 1700643.05878087813-15935Mar 202016.5 1699643.00985098517-171016Apr 202015.5 1699643.00951095122-11984May 202015.2 1699643.00904090425-16946Jun 202013.4 1671642.00825082525-12835Jul 202012.1 1671642.00747074723-11781Aug 202012.5 1618640.01744074418-12720Sep 2020

814508145198-1538541WY 2020

11.1 1434633.00680068015-4515Oct 20209.3 1486635.00556055610-19637Nov 20205.2 1604639.5131903199-12459Dec 20207.0 1666641.80432043210-16520Jan 20218.9 1666641.80495049510-13519Feb 202115.0 1700643.05920092013-15983Mar 202116.6 1699643.00987098717-171019Apr 202115.7 1699643.00964096422-11998May 202115.3 1699643.00910091025-16951Jun 202113.2 1671642.00813081325-12823Jul 202112.1 1671642.00743074323-11777Aug 202112.4 1618640.01737073718-12714Sep 2021

855708557197-1598914WY 2021

11.1 1434633.00680068015-4515Oct 20219.5 1486635.00565056510-19646Nov 20215.5 1604639.5133803389-12478Dec 2021



Parker Dam - Lake Havasu



(Ft)

EOMStorage

(1000 Ac-Ft)

TotalRelease

(1000 Ac-Ft)

EvapLosses

(1000 Ac-Ft)Date

CAPDiversion

(1000 Ac-Ft)

MWDDiversion

(1000 Ac-Ft)

Flow ToMexico

(1000 CFS)

DavisRelease

(1000 Ac-Ft)

Flow ToMexico

(1000 Ac-Ft)

TotalRelease

(1000 CFS)

SideInflow

(1000 Ac-Ft)4.1 122446.58250 2.0553916 87Jan 2019* 418 196.7 143447.53372 2.65711518 31Feb 2019H 569 13

10.2 185447.86630 3.0577839 11Mar 2019I 749 -512.0 170447.29712 2.956714411 28Apr 2019S 886 611.3 128448.62693 2.159215413 51May 2019T 937 812.0 138448.47717 2.358910415 53Jun 2019O 886 1112.0 146448.12739 2.45829217 59Jul 2019R 894 1510.3 111447.22636 1.856510217 67Aug 2019I 800 158.6 103449.03514 1.760016015 61Sep 2019C 767 26

15156231 1571140 690WY 2019 8539 173

7.0 68447.77430 1.157615112 30Oct 2019A 589 185.0 118449.10300 2.06011259 16Nov 2019L 457 232.6 109448.16159 1.8583727 46Dec 2019* 247 17

4.6 100446.50281 1.6552876 14Jan 2020 343 186.8 126446.50389 2.2552828 1Feb 2020 475 11

10.6 167446.70653 2.75551639 45Mar 2020 878 511.7 153448.70699 2.659315711 81Apr 2020 985 1211.3 125448.70696 2.059316513 77May 2020 951 1312.0 139448.70715 2.35939616 76Jun 2020 904 1111.4 150448.00701 2.45805017 77Jul 2020 825 1910.1 114447.50621 1.95715017 77Aug 2020 747 208.9 110447.50530 1.957013515 68Sep 2020 744 14

14786174 1333140 610WY 2020 8145 181

7.5 69447.50459 1.157116612 61Oct 2020 680 246.0 88447.50354 1.55711419 61Nov 2020 556 143.6 93446.50221 1.5552667 62Dec 2020 319 224.2 102446.50259 1.7552916 90Jan 2021 432 187.0 127446.50391 2.3552848 17Feb 2021 495 11

10.5 167446.70648 2.75551709 86Mar 2021 920 511.7 152448.70694 2.659316311 83Apr 2021 987 1211.5 127448.70705 2.159317213 74May 2021 964 1312.1 141448.70720 2.45939916 72Jun 2021 910 1111.2 152448.00689 2.55805217 74Jul 2021 813 1910.0 117447.50618 1.95715217 74Aug 2021 743 208.9 113447.50529 1.957014015 56Sep 2021 737 14

14506289 1395139 810WY 2021 8557 182

7.6 73447.50470 1.257117312 42Oct 2021 680 246.0 91447.50358 1.55711669 41Nov 2021 565 143.9 96446.50237 1.6552887 42Dec 2021 338 22



Hoover Dam - Lake Mead



(Ft)

HooverGross Energy

MKWH

HooverStatic Head

(Ft)

PowerRelease

(1000 CFS)Date

Percent ofUnits

Available KWH/AF

Change InStorage

(1000 Ac-Ft)

PowerRelease

(1000 Ac-Ft)

EOMStorage

(1000 Ac-Ft)

Hoover GenCapacity

MW1006.1104931085.75 376.8183.4361 637.9487Jan 2019* 442.101119.0106821087.97 396.7246.4189 7011.2621Feb 2019H 443.821112.0108781090.24 400.6295.7195 7012.0738Mar 2019I 444.26810.1107671088.95 405.2365.4-111 5115.2902Apr 2019S 439.99803.9105551086.48 402.5398.2-211 5116.1989May 2019T 440.791591.0104051084.71 393.7359.0-150 10015.3912Jun 2019O 439.381486.0102461082.82 392.7371.7-159 9315.4946Jul 2019R 435.561297.0102991083.45 390.9313.553 8113.0802Aug 2019I 439.021494.1102611083.00 384.4267.4-38 9311.7696Sep 2019C 439.88

3494.18877WY 2019

1198.0102281082.61 386.2241.9-33 7410.2626Oct 2019A 439.171192.0103331083.85 386.0221.9104 759.7575Nov 2019L 438.74838.0108991090.49 371.481.6567 523.6220Dec 2019* 448.42

1152.1112801094.85 390.1154.9381 706.5397Jan 2020 443.48943.1114911097.26 398.9201.0211 578.8504Feb 2020 447.801127.0112801094.86 410.2383.7-211 6815.2935Mar 2020 446.191365.9109061090.57 400.2406.8-374 8517.11016Apr 2020 440.741493.9105321086.21 389.6383.5-374 9416.0984May 2020 435.501562.0101931082.19 391.0369.9-340 10015.9946Jun 2020 430.681562.0100981081.05 390.5326.1-95 10013.6835Jul 2020 428.451562.0101481081.65 387.9302.851 10012.7781Aug 2020 428.511562.0100411080.37 386.1278.1-107 10012.1720Sep 2020 428.82

3352.38541WY 2020

1066.0101731081.94 395.9204.0131 688.4515Oct 2020 434.721066.0101711081.93 393.0250.3-1 6810.7637Nov 2020 437.791075.0104201084.89 392.9180.3249 687.5459Dec 2020 437.141088.0107801089.11 399.2207.6360 688.5520Jan 2021 438.48994.0110481092.21 397.1205.9268 619.3519Feb 2021 442.101374.9108871090.35 402.0395.1-162 8516.0983Mar 2021 439.651395.0105861086.84 395.7403.3-301 8817.11019Apr 2021 436.351368.9102751083.16 389.5388.6-311 8816.2998May 2021 432.801567.3100241080.16 389.0370.1-250 10016.0951Jun 2021 428.171568.1100351080.29 388.7319.811 10013.4823Jul 2021 427.071575.8101501081.67 387.3301.1115 10012.6777Aug 2021 428.151573.5101161081.26 386.1275.5-34 10012.0714Sep 2021 429.27

3501.58914WY 2021

1070.3102471082.83 396.6204.3131 688.4515Oct 2021 435.611069.9102371082.71 394.4254.8-10 6810.9646Nov 2021 438.611079.2104671085.45 395.2189.0231 687.8478Dec 2021 437.80



Davis Dam - Lake Mohave



(Ft)

DavisGross Energy

MKWH

DavisStatic Head

(Ft)

PowerRelease

(1000 CFS)Date

Percent ofUnits

Available KWH/AF

Change InStorage

(1000 Ac-Ft)

PowerRelease

(1000 Ac-Ft)

EOMStorage

(1000 Ac-Ft)

Davis GenCapacity

MW159.61668 135.856.830 636.8418Jan 2019* 143.26641.89209.51704 120.968.836 8210.2569Feb 2019H 144.69643.20218.81687 126.694.8-17 8612.2749Mar 2019I 140.17642.57210.81686 126.3111.9-1 8314.9886Apr 2019S 142.03642.52238.61707 127.6119.522 9415.2937May 2019T 139.79643.32255.01696 128.3113.6-12 10014.9886Jun 2019O 140.50642.89255.01712 126.5113.216 10014.5895Jul 2019R 142.50643.48255.01680 127.3101.8-32 10013.0800Aug 2019I 139.60642.31255.01573 125.196.0-107 10012.9767Sep 2019C 137.20638.35

1079.98538WY 2019

243.51572 124.473.2-2 959.6589Oct 2019A 138.85638.28153.01675 121.755.6103 607.7457Nov 2019L 143.18642.13156.31638 123.730.5-37 614.0247Dec 2019* 141.96640.77

164.51666 127.443.728 655.6343Jan 2020 141.40641.80209.51671 126.860.35 828.3475Feb 2020 140.78642.00218.81700 125.3110.029 8614.3878Mar 2020 139.03643.05214.21699 125.0123.1-1 8416.5985Apr 2020 138.75643.00238.61699 125.3119.10 9415.5951May 2020 139.09643.00255.01699 125.4113.40 10015.2904Jun 2020 139.18643.00255.01671 125.5103.6-27 10013.4825Jul 2020 139.31642.00255.01671 125.593.70 10012.1747Aug 2020 139.29642.00255.01618 124.592.6-54 10012.5744Sep 2020 138.16640.01

1018.98145WY 2020

243.51434 120.982.3-183 9511.1680Oct 2020 134.22633.00153.01486 119.366.451 609.3556Nov 2020 132.42635.00156.31604 123.939.5118 615.2319Dec 2020 137.56639.51156.31666 126.254.562 617.0432Jan 2021 140.09641.80156.51666 126.562.70 618.9495Feb 2021 140.40641.80194.11700 124.9115.034 7615.0920Mar 2021 138.69643.05249.91699 125.0123.4-1 9816.6987Apr 2021 138.74643.00255.01699 125.2120.70 10015.7964May 2021 139.02643.00255.01699 125.4114.10 10015.3910Jun 2021 139.15643.00255.01671 125.6102.1-27 10013.2813Jul 2021 139.39642.00255.01671 125.593.30 10012.1743Aug 2021 139.31642.00255.01618 124.591.7-54 10012.4737Sep 2021 138.21640.01

1065.68557WY 2021

227.01434 120.982.2-183 8911.1680Oct 2021 134.22633.00159.81486 119.267.451 639.5565Nov 2021 132.36635.00154.71604 123.841.9118 615.5338Dec 2021 137.41639.51



Parker Dam - Lake Havasu



(Ft)

ParkerGross Energy

MKWH

ParkerStatic Head

(Ft)

PowerRelease

(1000 CFS)Date

Percent ofUnits

Available KWH/AF

Change InStorage

(1000 Ac-Ft)

PowerRelease

(1000 Ac-Ft)

EOMStorage

(1000 Ac-Ft)

Parker GenCapacity

MW117.1553446.58 68.217.01 984.1250Jan 2019* 82.7595.4571447.53 68.625.518 796.7372Feb 2019H 81.87111.3577447.86 70.444.36 9310.2630Mar 2019I 82.11115.0567447.29 69.549.5-11 9612.0712Apr 2019S 79.40119.0592448.62 72.248.625 9911.3673May 2019T 80.51120.0589448.47 70.250.3-3 10012.0717Jun 2019O 80.43120.0582448.12 69.551.4-7 10012.0739Jul 2019R 80.11120.0565447.22 69.744.3-17 10010.3636Aug 2019I 77.13120.0600449.03 69.835.934 1008.6514Sep 2019C 83.07

433.76211WY 2019

90.0576447.77 70.130.2-24 757.0430Oct 2019A 83.2192.0601449.10 67.220.225 775.0300Nov 2019L 84.29

100.6583448.16 59.39.4-18 842.6159Dec 2019* 81.68

91.0552446.50 63.717.9-31 764.6281Jan 2020 76.0895.4552446.50 64.625.10 796.8389Feb 2020 75.04111.3555446.70 65.142.64 9310.6653Mar 2020 74.39118.0593448.70 65.946.138 9811.7699Apr 2020 75.17119.0593448.70 66.546.30 9911.3696May 2020 76.09120.0593448.70 66.647.60 10012.0715Jun 2020 76.05120.0580448.00 66.246.4-13 10011.4701Jul 2020 75.71120.0571447.50 65.540.7-9 10010.1621Aug 2020 75.13120.0570447.50 65.134.50 1008.9530Sep 2020 74.89

406.96174WY 2020

90.0571447.50 65.930.20 757.5459Oct 2020 76.2992.0571447.50 65.023.00 776.0354Nov 2020 76.19100.6552446.50 61.813.7-19 843.6221Dec 2020 75.2794.8552446.50 62.716.20 794.2259Jan 2021 75.0793.1552446.50 64.925.40 787.0391Feb 2021 75.16

120.0555446.70 64.842.04 10010.5648Mar 2021 74.01120.0593448.70 65.845.738 10011.7694Apr 2021 75.08120.0593448.70 66.546.90 10011.5705May 2021 76.05120.0593448.70 66.648.00 10012.1720Jun 2021 76.05120.0580448.00 66.245.6-13 10011.2689Jul 2021 75.71120.0571447.50 65.540.5-9 10010.0618Aug 2021 75.13120.0570447.50 65.134.50 1008.9529Sep 2021 74.89

411.66289WY 2021

90.0571447.50 66.031.00 757.6470Oct 2021 76.2992.0571447.50 65.023.30 776.0358Nov 2021 76.19109.4552446.50 62.014.7-19 913.9237Dec 2021 74.86



Upper Basin Power


FontenelleReservoir

1000 MWHR

CrystalReservoir

1000 MWHR

GlenCanyon

1000 MWHRDate

FlamingGorge

1000 MWHR

BlueMesa

1000 MWHR

MorrowPoint

1000 MWHR335 1 447 4 6Jan 2019*302 1 342 6 8Feb 2019H325 4 322 6 9Mar 2019I

1790 19 24233 36 51Winter 2019294 10 427 9 14Apr 2019S299 21 638 23 45May 2019T332 22 882 33 64Jun 2019O391 23 739 28 54Jul 2019R412 22 742 24 49Aug 2019I312 18 244 15 22Sep 2019C

2041 115 34273 131 248Summer 2019281 18 531 26 27Oct 2019A280 14 531 22 25Nov 2019L336 17 551 26 30Dec 2019*322 11 548 18 23Jan 2020285 8 445 12 15Feb 2020294 9 442 6 17Mar 20201798 78 29249 110 137Winter 2020264 15 540 19 27Apr 2020267 23 627 47 65May 2020281 19 982 17 27Jun 2020328 19 1029 31 38Jul 2020365 19 735 32 38Aug 2020260 14 241 23 27Sep 20201765 109 38255 168 222Summer 2020278 12 630 18 23Oct 2020277 4 527 6 7Nov 2020310 11 535 17 21Dec 2020368 9 535 13 16Jan 2021319 0 432 13 16Feb 2021338 8 434 0 18Mar 2021

1889 44 30194 67 101Winter 2021300 14 533 0 24Apr 2021304 17 727 2 23May 2021329 22 987 52 66Jun 2021379 20 1032 31 37Jul 2021400 20 836 34 40Aug 2021297 15 239 26 30Sep 2021

2010 109 40255 144 220Summer 2021283 16 729 26 31Oct 2021282 12 531 19 23Nov 2021316 19 545 31 38Dec 2021



Flood Control CriteriaBeginning of Month Conditions


NavajoKAFDate

FlamingGorgeKAF

BlueMesaKAF

LakePowellKAF

Upper BasinTotalKAF

LakeMeadKAF

TotalKAF

FlamingGorgeKAF

BlueMesaKAF

NavajoKAF

LakePowellKAF

Tot or MaxAllowKAF

LakeMeadKAF

TotalKAF

BOM SpaceRequired

KAF

MeadSched Rel

KAF

MeadFC RelKAF

SysContMAF

* * * * 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 * * * *558 242 370 11718 12889 16478 29366 558 242 370 1171 11718 16478 29366 5350 397 0 31.3Jan 2020558 242 370 11718 12889 16478 29366 162 144 357 663 11718 16478 28859 5350 397 0 31.3Jan 2020648 277 380 12010 13315 16097 29411 251 181 366 798 12010 16097 28905 1500 504 0 31.2Feb 2020726 293 382 12222 13623 15886 29508 329 198 368 894 12222 15886 29001 1500 935 0 30.9Mar 2020743 298 362 12369 13772 16097 29869 343 205 340 888 12369 16097 29353 1500 1016 0 30.7Apr 2020729 301 323 12263 13616 16471 30087 323 206 278 807 12263 16471 29540 1500 984 0 31.3May 2020606 301 225 11548 12680 16845 29524 187 193 139 519 11548 16845 28912 1500 946 0 32.5Jun 2020510 124 168 10319 11121 17184 28305 80 -1 25 104 10319 17184 27607 1500 835 0 32.5Jul 2020

* * * * C R E D I T A B L E S P A C E* * * *448 120 205 10207 10981 17279 28260 448 120 205 774 10207 17279 28260 1500 781 0 32.1Aug 2020489 163 255 10528 11435 17229 28663 489 163 255 907 10528 17229 28663 2270 720 0 31.7Sep 2020561 192 312 10627 11692 17336 29028 561 192 312 1065 10627 17336 29028 3040 515 0 31.4Oct 2020595 215 316 10755 11881 17204 29085 595 215 316 1126 10755 17204 29085 3810 637 0 31.3Nov 2020623 203 322 10943 12091 17206 29297 623 203 322 1149 10943 17206 29297 4580 459 0 31.3Dec 2020686 235 333 11207 12461 16957 29418 686 235 333 1254 11207 16957 29418 5350 520 0 31.2Jan 2021

* * * * E F F E C T I V E S P A C E * * * *686 235 333 11207 12461 16957 29418 325 235 116 676 11207 16957 28840 5350 520 0 31.2Jan 2021744 253 346 11599 12942 16597 29539 382 253 129 763 11599 16597 28959 1500 519 0 31.1Feb 2021789 273 348 11881 13291 16329 29619 425 273 130 827 11881 16329 29037 1500 983 0 30.8Mar 2021783 282 309 12064 13438 16490 29928 414 282 84 780 12064 16490 29334 1500 1019 0 30.9Apr 2021746 262 235 11916 13159 16791 29950 370 262 -15 617 11916 16791 29324 1500 998 0 32.0May 2021587 94 235 10775 11691 17102 28793 199 94 -55 238 10775 17102 28115 1500 951 0 33.5Jun 2021521 22 375 9081 9999 17353 27352 123 19 27 169 9081 17353 26602 1500 823 0 33.6Jul 2021

* * * * C R E D I T A B L E S P A C E* * * *418 1 409 9008 9837 17342 27179 418 1 409 828 9008 17342 27179 1500 777 0 33.3Aug 2021443 37 431 9353 10264 17227 27491 443 37 431 911 9353 17227 27491 2270 714 0 32.9Sep 2021506 72 435 9546 10561 17261 27822 506 72 435 1014 9546 17261 27822 3040 515 0 32.7Oct 2021536 113 431 9644 10724 17130 27854 536 113 431 1080 9644 17130 27854 3810 646 0 32.5Nov 2021572 145 434 9778 10929 17140 28069 572 145 434 1151 9778 17140 28069 4580 478 0 32.5Dec 2021


january 24-month study date: january 15, 2020 · the next fontenelle working group meeting is...

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