august 24-month study date: august 15, 2019 · meeting will be held at the water treatment...

August 24-Month Study Date: August 15, 2019

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

Reservoir

July Inflow

(unregulated) (acre-feet)

Percent of Average

(%)

August 14, Midnight Elevation

(feet)

August 14, Midnight Reservoir Storage

(acre-feet) Fontenelle 184,000 104 6,502.60 318,000 Flaming Gorge 227,000 108 6,033.59 3,490,000 Blue Mesa 282,000 241 7,516.66 804,800 Navajo 171,000 259 6,072.30 1,513,000 Powell 2,451,000 225 3,621.04 13,874,000

_______________________________________________________________________ Expected Operations The operation of Lake Powell and Lake Mead in this August 2019 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 2019 Annual Operating Plan (AOP). Pursuant to the Interim Guidelines, the August 2018 24-Month Study projections of the January 1, 2019, system storage and reservoir water surface elevations set the operational tier for the coordinated operation of Lake Powell and Lake Mead during 2019. Consistent with Section 6.B of the Interim Guidelines, the Lake Powell operational tier for water year 2019 is the Upper Elevation Balancing Tier. With an 8.23 million acre-feet (maf) release from Lake Powell in water year 2019, the April 2019 24-Month Study projected 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. Therefore, in accordance with Section 6.B.4 of the Interim Guidelines, Lake Powell operations shifted to balancing releases for the remainder of water year 2019. Under Section 6.B.4, the contents of Lake Powell and Lake Mead will be balanced by the end of the water year, but not more than 9.0 maf and not less than 8.23 maf shall be released from Lake Powell. Based on the most probable inflow forecast, this August 24-Month Study projects a balancing release of 9.0 maf in water year 2019.

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 2019. The August 2019 24-Month Study projects the January 1, 2020 Lake Powell elevation to be below the 2019 Equalization Elevation of 3,657 feet and above elevation 3,575 feet. 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 August 24-Month Study projects an annual release of 8.23 maf in water year 2020. The August 2019 24-Month Study projects the January 1, 2020 Lake Mead elevation to be above 1,075 feet and below 1,090 feet. 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 for calendar year 2020. The 2020 operational tier determinations for Lake Powell and Lake Mead will be documented in the 2020 AOP, which is currently in development. The Interim Guidelines are available for download at: https://www.usbr.gov/lc/region/programs/strategies/RecordofDecision.pdf. The 2019 AOP is available for download at: https://www.usbr.gov/lc/region/g4000/aop/AOP19.pdf. The Colorado River DCPs are available for download at: https://www.usbr.gov/dcp/finaldocs.html.

Fontenelle Reservoir – Fontenelle Reservoir is currently at elevation 6502.72 feet, which amounts to 92 percent of live storage capacity. Inflows for the month of July totaled 184,000 acre-feet (af) or 104 percent of average. Releases are steady at 1200 cfs.

The Colorado Basin River Forecast Center has forecasted inflows that are at or near average. August, September, and October forecasted inflow volumes amount to 72,000 af (94 percent of average), 46,000 af (100 percent of average), and 46,000 af (95 percent of average), respectively.

The next Fontenelle Working Group meeting is scheduled for August 22, 2019. The meeting will be held at the Water Treatment Facility, 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 – The Colorado Pikeminnow base flow study is in progress. Targeted flows at the USGS Jensen gage with the combination of Flaming Gorge releases

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

https://www.usbr.gov/lc/region/g4000/aop/AOP19.pdf

https://www.usbr.gov/dcp/finaldocs.html

and Yampa River flows is between 2000 cfs to 2600 cfs. Releases from Flaming Gorge Dam will depend on how much flow is provided by the Yampa River. The August final forecast for unregulated inflows into Flaming Gorge for the next three months projects near average conditions: August, September, and October forecasted unregulated inflow volumes at 85,000 af (96 percent of average), 56,000 af (102 percent of average), and 60,000 af (102 percent of average), respectively. Reclamation will be holding the Flaming Gorge Working Group meeting on August 15th at 10 a.m. at Carbon County Event Center, 450 S Fairgrounds Rd, Price, UT 84501, USA 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 August 6, 2019 releases from Crystal Dam are approximately 3,100 cfs. Uncompahgre Valley Water Users Association is diverting approximately 1,150 cfs through the Gunnison Tunnel and flows in the Black Canyon are about 2,350 cfs. Releases from Crystal are in gradually being reduced as inflows to Blue Mesa steadily decrease. By Thursday, August 8, 2019 releases from Crystal will be set to approximately 2500 cfs and will likely remain at this level for the next 2 weeks. Blue Mesa did fill this year 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 7517.28 feet above sea level on August 8, 2019. The unregulated inflow volume in July to Blue Mesa was 282 kaf (241 percent of average). Unregulated Inflow volumes forecasted for Blue Mesa for the next three months (August, September and October) are projected to be: 88,000 af (140 percent of average), 53,000 af (140 percent of average) and 47,000 af (124 percent of average), respectively. The August 24-Month Study is reflective of these new forecasts. The water year unregulated inflow forecast volume for 2019 is 1.361 maf which is 143 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 Tuesday, August 15, 2019 at 1:00 pm at the Elk Creek Visitor Center at Blue Mesa Reservoir. Navajo Reservoir – On August 4th, the daily average release rate from Navajo Dam was approximately 1,030 cfs while reservoir inflow (modified unregulated) was averaging approximately 1,160 cfs. The water surface elevation was 6073.6 feet above sea level. At this elevation the live storage is 1.53 maf (90 percent of live storage capacity) and the active storage is 0.86 maf (83 percent of active storage capacity). NIIP was diverting 840 cfs from the reservoir. The river flow measured at the Animas River at Farmington USGS gage was at 1,030 cfs. River flow at the San Juan River at Four Corners USGS gage was 1,640 cfs. Total April-July modified unregulated inflow totaled 1.16 maf, or 158 percent of average. 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 July was 171 kaf (259 percent of average for the month). Forecast modified-unregulated inflow to Navajo over the next three months (August, September, and October) are projected to be: 48 kaf (106 percent of average), 42 kaf (97 percent of average), and 45 kaf (96 percent of average), respectively. A maintenance release was conducted from Navajo Dam from June 3rd through June 15th. The release peaked at 5,000 cfs on June 12th. The reservoir is likely to peak in the next several days at an elevation near 6075.5 ft. The San Juan River Recovery Implementation Program (SJRIP) has requested Available Water over the End of Water Year Storage Target of 6063 ft be used to augment baseflows in the critical habitat reach (Farmington to Lake Powell), as recommended in the Flow Recommendations decision tree (1999, updated 2016). Available water over this target will be used to increase the downstream target baseflow to 1500 cfs through October, as long as water is available. Starting in November, the target baseflow will be set as low as possible (with a minimum of 500 cfs) for two weeks, by reducing the release as low as possible, as low as 250 cfs (ROD, 2006). By mid-November, the release will resume normal operations, in an attempt to maintain the typical target baseflow range of 500 - 1000 cfs. Releases will likely range from 800 – 1200 cfs throughout the remainder of the summer. 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, August 20, 2019 at 1:00 pm at the Farmington Civic Center (200 West Arrington, Farmington, NM). Glen Canyon Dam / Lake Powell Current Status The Department of the Interior is conducting the first experimental flow at Glen Canyon Dam since implementing its Long-Term Experimental and Management Plan (LTEMP). The goal is to provide enhanced habitat for the lifecycle of aquatic insects that are the primary food source for fish in the Colorado River. Experiments under LTEMP consist of four different flow regimes: high flows, bug flows, trout management flows, and low summer flows. Collaborative discussions among technical experts resulted in a decision to begin this first experiment on May 1 and continue through August 31, 2018. This experiment is being continued for 2019, same time period, (May – August). It will slightly modify the schedule and flow rates of water releases from Lake Powell through Glen Canyon Dam, Arizona. The normally scheduled monthly and weekly release volumes will not be affected. Flows during the experiment will include steady weekend water releases with routine hydropower production flows on weekdays that include normal hourly changes in release rates. Those steady weekend flows are expected to provide favorable conditions for aquatic insects to lay and cement their eggs to rocks, vegetation, and other materials near the river’s edge. Steady weekend flows will be relatively low, within four inches of typical weekday low water levels. It is unlikely casual recreational river users will notice the changes in water levels. Insects expected to benefit from this experiment are an important food source for many species of fish, birds, and bats in the canyon. Beyond expected resource benefits, this experiment will also provide scientific information that will be used in future decision making. The unregulated inflow volume to Lake Powell during July was 2.45 (maf) (225 percent of average). The release volume from Glen Canyon Dam in July was 857 thousand acre-feet (kaf). The end of July elevation and storage of Lake Powell were 3,622 ft (78 feet from full pool) and 13.93 maf (57 percent of full capacity), respectively. Current Operations The operating tier for water year 2019 was established in August 2018 as the Upper Elevation Balancing Tier. As described in the Interim Guidelines, under balancing, the contents of Lake Powell and Lake Mead are to be balanced by the end of the water year,

but not more than 9.0 maf and not less than 8.23 maf is to be released from Lake Powell. Under this Tier the initial annual water year release volume is 8.23 maf, and the April 2019 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 have shifted to balancing releases for the remainder of water year 2019. Lake Powell is currently projected to release 9.0 maf in water year 2019. Reclamation will schedule operations at Glen Canyon Dam to achieve as practicably as possible the appropriate total annual release volume by September 30, 2019. In August, the release volume will be approximately 900 kaf, with fluctuations anticipated between about 10,850 cfs in the nighttime to about 18,850 cfs in the daytime with 11,600 cfs steady releases during the weekend, and consistent with the Glen Canyon Dam, Record of Decision (dated December 2016). The anticipated release volume for September is 687 kaf with daily fluctuations between approximately 8.380 cfs and 14,530 cfs. The expected release for October is 640 kaf. 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 August 1, 2019, by the Colorado Basin River Forecast Center, projects that the most probable (median) unregulated inflow volume this year will be 10.8 maf (100 percent of average). There is significant uncertainty regarding this season’s snow pack 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 August forecast ranges from a minimum probable of 7.0 maf (65 percent of average) to a maximum probable of 19 maf (175 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 August 24-Month Study projects Lake Powell elevation will end water year 2020 near 3,640.14 feet with approximately 16.02 maf in storage (66 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 August 2019 are 3,605.03 feet (12.24 maf, 50 percent of capacity) and 3,657 feet (18.10 maf, 74 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 August most probable scenario, and 9.0 maf under the minimum probable and 13.49 maf under the maximum probable inflow scenarios. Upper Colorado River Basin Hydrology Upper Colorado River Basin regularly experiences significant year to year hydrologic variability. During the 19-year period 2000 to 2018, 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 2000-2018 is the lowest 19-year period since the closure of Glen Canyon Dam in 1963, with an average unregulated inflow of 8.54 maf, or 79 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 2000-2018 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 2019 unregulated inflow to Lake Powell is projected to be 13.54 maf (125 percent of average). At the beginning of water year 2019, total system storage in the Colorado River Basin was 28.01 maf (47 percent of 59.6 maf total system capacity). This is a decrease of 4.91 maf over the total storage at the beginning of water year 2018 when total system storage was 32.92 maf (55 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 47 percent of capacity at the beginning of water year 2019. Based on current inflow forecasts, the current projected end of water year total Colorado Basin reservoir storage for water year 2019 is approximately 32.2 maf (54 percent of total system capacity). The actual end of water year 2019 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 jun Forecast Outlook : apr may jun jul %Avg aug sep oct apr-jul %Avg GLDA3:Lake Powell 1242 2511 4206 2451 225%: 700/ 500/ 610/10410/: 145% GBRW4:Fontenelle 114 167 337 184 104%: 72/ 46/ 46/ 802/: 111% GRNU1:Flaming Gorge 240 252 460 227 108%: 85/ 56/ 60/ 1179/: 120% BMDC2:Blue Mesa 121 214 471 282 241%: 88/ 53/ 47/ 1088/: 161% MPSC2:Morrow Point 136 240 512 295 240%: 93/ 57/ 50/ 1183/: 160% CLSC2:Crystal 150 264 558 321 233%: 103/ 65/ 57/ 1293/: 155% TPIC2:Taylor Park 10.1 21 68 47 233%: 15/ 9/ 8/ 146/: 147% VCRC2:Vallecito 32 58 160 58 200%: 22/ 19/ 15/ 308/: 159% NVRN5:Navajo 230 270 491 171 259%: 48/ 42/ 45/ 1162/: 158% LEMC2:Lemon 5.8 12.1 46 19.6 295%: 5/ 4/ 3/ 84/: 153% MPHC2:McPhee 105 117 181 52 231%: 15/ 11/ 9/ 455/: 154% RBSC2:Ridgway 10.9 15.9 50 46 181%: 17/ 10/ 9/ 123/: 122% YDLC2:Deerlodge 260 459 643 264 264%: 32/ 17/ 30/ 1626/: 131%

Most Probable Inflow*August 2019 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)50 76 6500.10 2992 75 1Aug 2018*30 65 6495.11 2622 7 58Sep 2018H

1397 138215 856 528WY 2018

42 65 6491.62 2381 45 20Oct 2018I38 60 6488.29 2161 60 0Nov 2018S30 61 6483.19 1841 61 1Dec 2018T28 61 6476.81 1501 61 0Jan 2019O26 56 6470.41 1200 55 1Feb 2019R37 61 6464.13 950 61 0Mar 2019I114 71 6474.10 1371 71 0Apr 2019C167 98 6486.46 2041 98 0May 2019A337 278 6494.89 2612 107 171Jun 2019L184 125 6502.48 3173 86 39Jul 2019*

72 74 6501.96 3142 74 0Aug 201946 71 6498.35 2872 37 35Sep 2019

1121 108315 817 266WY 2019

46 71 6494.76 2611 71 0Oct 201944 68 6491.14 2361 68 0Nov 201937 71 6485.85 2011 71 0Dec 201932 71 6479.08 1621 71 0Jan 202030 66 6471.43 1250 66 0Feb 202048 67 6466.65 1050 67 0Mar 202075 75 6466.51 1051 75 0Apr 2020

155 105 6477.58 1541 97 8May 2020275 126 6500.35 3022 102 24Jun 2020170 135 6504.49 3343 101 34Jul 202068 105 6499.46 2952 102 3Aug 202045 95 6492.18 2432 21 75Sep 2020

1025 105514 911 144WY 2020

48 63 6489.73 2271 63 0Oct 202042 60 6487.00 2091 60 0Nov 202032 61 6482.08 1781 61 0Dec 202030 61 6476.07 1471 61 0Jan 202128 56 6469.84 1180 56 0Feb 202153 65 6466.69 1060 65 0Mar 202185 87 6466.03 1031 87 0Apr 2021

164 105 6478.92 1611 97 8May 2021299 170 6498.59 2882 102 68Jun 2021178 132 6504.15 3313 102 30Jul 2021

* Based on the Colorado River Basin Forecast Center's Most Probable Water Supply Forecast Model Run ID: 3097 Processed On: 8/12/2019 12:19:55PM


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 6032.67124 142345313913 0Aug 2018* 42 68119 6030.75119 132337813611 0Sep 2018H 17 52

1608 1616 263882 7WY 2018 1594 1580

99 6029.9999 13133491357 0Oct 2018I 52 7593 6029.1593 12133161334 0Nov 2018S 41 63

124 6027.49124 15332531312 0Dec 2018T 29 60124 6026.01124 15431981292 0Jan 2019O 34 68112 6024.69112 14331491272 0Feb 2019R 34 6358 6025.6758 12831851283 0Mar 2019I 74 9971 6028.7971 34133031335 0Apr 2019C 240 19899 6030.7199 56833761368 0May 2019A 252 183

215 6032.55315 950344813911 100Jun 2019L 460 400100 6033.89100 373350214114 0Jul 2019* 227 169

116 6032.87116 148346113913 0Aug 2019 85 87131 6031.39131 148340313712 0Sep 2019 56 811339 1439 335882 100WY 2019 1585 1547

76 6031.4176 10634041377 0Oct 2019 60 8571 6031.6571 10434131374 0Nov 2019 60 84

169 6029.24169 19633201342 0Dec 2019 40 74169 6027.05169 19332371302 0Jan 2020 46 85158 6025.12158 18231651272 0Feb 2020 49 8578 6026.0578 14931991293 0Mar 2020 98 11776 6027.4476 28632511315 0Apr 2020 135 13578 6029.7978 60833411348 0May 2020 230 180

242 6028.23242 682328113210 0Jun 2020 340 191113 6029.20113 188331813414 0Jul 2020 200 165123 6028.64123 144329713313 0Aug 2020 77 114119 6027.89119 134326813211 0Sep 2020 50 100

1474 1474 297480 0WY 2020 1385 1415

68 6027.7768 9632641317 0Oct 2020 55 7065 6027.7265 9532621313 0Nov 2020 50 67117 6026.34117 14232101292 0Dec 2020 35 64117 6025.12117 14231651272 0Jan 2021 40 72106 6024.20106 13331311262 0Feb 2021 45 7261 6025.5161 13831791283 0Mar 2021 102 11560 6027.3460 27532481315 0Apr 2021 134 13665 6030.1865 59733561358 0May 2021 245 186

238 6029.95259 679334713511 21Jun 2021 390 260124 6030.64124 224337413614 0Jul 2021 210 165



Taylor Park Reservoir



(Ft)

LiveStorage

(1000 Ac-Ft)

TotalRelease

(1000 Ac-Ft)

RegulatedInflow

(1000 Ac-Ft)Date* Aug 2018 3 13 9305.51 63H Sep 2018 3 8 9301.71 58

WY 2018 88 108

I Oct 2018 5 3 9302.60 59S Nov 2018 3 3 9302.61 59T Dec 2018 4 3 9302.74 59O Jan 2019 4 3 9302.92 59R Feb 2019 3 3 9303.16 60I Mar 2019 5 4 9303.75 60C Apr 2019 10 7 9306.14 64A May 2019 21 26 9302.64 59L Jun 2019 68 38 9320.92 89* Jul 2019 47 32 9328.49 103

Aug 2019 15 24 9324.14 95Sep 2019 9 21 9317.77 83WY 2019 193 168

Oct 2019 8 10 9316.87 81Nov 2019 7 6 9317.47 82Dec 2019 6 6 9317.39 82Jan 2020 5 6 9316.73 81Feb 2020 5 6 9316.42 81Mar 2020 5 6 9315.75 79Apr 2020 7 10 9313.99 76

May 2020 29 18 9320.26 87Jun 2020 40 24 9328.61 103Jul 2020 16 24 9324.53 95

Aug 2020 9 19 9319.16 85Sep 2020 7 18 9313.09 75WY 2020 144 152


May 2021 28 13 9316.92 81Jun 2021 42 19 9329.23 105Jul 2021 20 23 9327.75 102



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)* Aug 2018 28 93 7453.77 3341 93 019H Sep 2018 17 68 7444.44 2821 30 3912

WY 2018 453 8957 856 39433

I Oct 2018 22 56 7437.59 2480 46 1123S Nov 2018 21 19 7438.08 2500 19 022T Dec 2018 19 21 7437.82 2490 21 020O Jan 2019 20 17 7438.40 2520 17 020R Feb 2019 20 23 7437.59 2480 23 020I Mar 2019 27 25 7438.01 2500 25 028C Apr 2019 118 33 7453.91 3350 33 0121A May 2019 218 105 7471.68 4471 86 18214L Jun 2019 444 194 7504.14 6961 124 70471* Jul 2019 266 138 7518.61 8232 87 51282

Aug 2019 97 138 7513.89 7801 108 3088Sep 2019 65 104 7509.29 7401 104 053WY 2019 1336 8718 692 1801361

Oct 2019 49 84 7505.11 7041 84 047Nov 2019 37 77 7500.28 6640 77 038Dec 2019 33 112 7490.43 5850 112 033Jan 2020 31 54 7487.44 5620 54 030Feb 2020 27 51 7484.25 5370 51 026Mar 2020 39 51 7482.54 5250 51 038Apr 2020 76 63 7484.23 5371 63 073

May 2020 209 258 7477.40 4871 202 56220Jun 2020 259 68 7501.86 6771 68 0275Jul 2020 105 63 7506.70 7171 63 097

Aug 2020 64 72 7505.66 7091 72 054Sep 2020 50 76 7502.35 6811 76 039WY 2020 978 10298 973 56970

Oct 2020 41 50 7501.25 6721 50 039Nov 2020 34 49 7499.35 6560 49 031Dec 2020 26 92 7491.09 5900 92 026Jan 2021 25 67 7485.51 5470 67 024Feb 2021 23 49 7481.97 5200 49 022Mar 2021 38 57 7479.32 5010 0 5736Apr 2021 78 84 7478.39 4941 0 8477

May 2021 206 239 7473.62 4611 6 232221Jun 2021 238 59 7497.15 6381 59 0261Jul 2021 120 75 7502.42 6811 75 0117



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)93 1127153.969494093 0Aug 2018* 1970 987135.778484268 0Sep 2018H 14

922 93793527895 0WY 2018 460

57 997136.925656156 0Oct 2018I 2420 1047143.471513119 0Nov 2018S 2322 1077147.951818121 0Dec 2018T 2117 1077147.001818117 0Jan 2019O 2124 1077147.572323023 0Feb 2019R 2026 1077146.902626125 0Mar 2019I 2947 1137155.1641411533 0Apr 2019C 136

130 1137154.6813112725105 0May 2019A 240235 1137155.1023418641194 0Jun 2019L 512150 1127154.1815115113138 0Jul 2019* 295

143 1127153.731431435138 0Aug 2019 93108 1127153.731081084104 0Sep 2019 57980 966912109871 0WY 2019 1470

87 1127153.738787384 0Oct 2019 5080 1127153.738080377 0Nov 2019 41115 1127153.731151153112 0Dec 2019 3657 1127153.735757354 0Jan 2020 3354 1127153.735454351 0Feb 2020 2955 1127153.735555451 0Mar 2020 4276 1127153.7376761363 0Apr 2020 86

283 1127153.7328328325258 0May 2020 24588 1127153.7388882068 0Jun 2020 29570 1127153.737070763 0Jul 2020 10475 1127153.737575372 0Aug 2020 5779 1127153.737979376 0Sep 2020 42

1119 11191119901029 0WY 2020 1060

53 1127153.735353350 0Oct 2020 4251 1127153.735151249 0Nov 2020 3494 1127153.739494292 0Dec 2020 2870 1127153.737070267 0Jan 2021 2752 1127153.735252349 0Feb 2021 2561 1127153.736161457 0Mar 2021 4095 1127153.7395951184 0Apr 2021 88

265 1127153.7326526526239 0May 2021 24779 1127153.7379792059 0Jun 2021 28181 1127153.738181675 0Jul 2021 123



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)98 656744.8398 36159694 0Aug 2018* 21 287 596737.2287 33138584 0Sep 2018H 15 1

959 438985 553982937 26WY 2018 505 45

55 336751.8755 24175956 0Oct 2018I 27 321 16743.1121 19141915 0Nov 2018S 26 421 06745.3222 20152218 0Dec 2018T 25 419 16746.5722 20152218 3Jan 2019O 25 49 16748.2626 25162723 17Feb 2019R 24 3

30 06752.7730 29173226 0Mar 2019I 34 555 266753.2955 29175541 0Apr 2019C 150 15

108 476759.30153 10519155131 31May 2019A 264 24115 516753.12282 23117280234 73Jun 2019L 558 46121 616746.79178 12415177151 57Jul 2019* 321 26

136 656753.04151 8617153143 15Aug 2019 103 10116 556753.04116 6117116108 0Sep 2019 65 8807 3411112 7741117966 198WY 2019 1621 151

94 306753.0494 64179487 0Oct 2019 57 786 06753.0486 86178680 0Nov 2019 47 6

120 06753.04120 12017120115 0Dec 2019 41 563 06753.0463 63176357 0Jan 2020 39 60 06753.0458 58175854 58Feb 2020 33 4

47 56753.0461 56176155 15Mar 2020 48 689 426753.0489 47178976 0Apr 2020 99 13

134 626753.04318 25617318283 184May 2020 280 35123 616753.04123 621712388 0Jun 2020 330 3582 656753.0482 17178270 0Jul 2020 116 1282 656753.0482 17178275 0Aug 2020 64 783 556753.0483 28178379 0Sep 2020 46 4

1002 3851259 87412591119 256WY 2020 1200 140

58 306753.0458 28175853 0Oct 2020 46 556 06753.0456 56175651 0Nov 2020 38 498 06753.0498 98179894 0Dec 2020 32 574 06753.0474 74177470 0Jan 2021 31 556 06753.0456 56175652 0Feb 2021 29 468 56753.0468 63176861 0Mar 2021 46 6

107 426753.04107 651710795 0Apr 2021 101 12134 626753.04299 23717299265 165May 2021 281 34113 616753.04113 521711379 0Jun 2021 315 3496 656753.0496 31179681 0Jul 2021 138 14



Vallecito Reservoir



(Ft)

LiveStorage

(1000 Ac-Ft)

TotalRelease

(1000 Ac-Ft)

RegulatedInflow

(1000 Ac-Ft)Date* Aug 2018 5 19 7613.87 22H Sep 2018 3 4 7613.06 21

WY 2018 102 153

I Oct 2018 9 3 7617.56 26S Nov 2018 5 0 7621.25 31T Dec 2018 3 0 7623.31 34O Jan 2019 4 0 7625.50 37R Feb 2019 4 0 7627.67 41I Mar 2019 6 6 7627.39 40C Apr 2019 32 25 7631.32 47A May 2019 58 41 7640.08 64L Jun 2019 160 101 7664.36 124* Jul 2019 69 68 7664.45 124

Aug 2019 22 38 7658.33 108Sep 2019 19 30 7654.00 97WY 2019 391 312


May 2020 64 63 7664.90 125Jun 2020 68 68 7664.81 125Jul 2020 27 41 7659.14 110

Aug 2020 17 38 7650.72 89Sep 2020 14 29 7644.04 73WY 2020 265 285


May 2021 71 62 7664.03 123Jun 2021 70 70 7663.85 122Jul 2021 29 42 7658.88 109



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)7 9916028.2751 474230-7Aug 2018*3 9196020.8046 4127202Sep 2018H

283 405 5312242436268WY 2018

17 8976018.3531 4071123Oct 2018I10 8886017.4318 3401015Nov 2018S9 8796016.3918 3000012Dec 2018T10 8696015.3319 3100013Jan 2019O14 8656014.9016 3711017Feb 2019R113 9556024.6118 62411114Mar 2019I203 11176040.3620 10220224230Apr 2019C216 12796054.4525 14325334270May 2019A376 15016071.44114 38536457491Jun 2019L141 15316073.5659 22447526171Jul 2019*

62 14786069.8562 114484248Aug 201951 14396066.9961 98263242Sep 2019

1221 460 1301214261471447WY 2019

45 14436067.2431 61102245Oct 201934 14546068.0822 4401139Nov 201927 14506067.7931 4901029Dec 201925 14446067.3331 4701026Jan 202031 14456067.3929 4301031Feb 202067 14746069.5131 5262780Mar 2020

109 15296073.4430 8321317145Apr 2020238 15226072.96204 35136436275May 2020170 13586060.83276 41153424195Jun 202058 13086056.8747 102574245Jul 202056 12826054.7531 64483136Aug 202048 12726053.9030 56263134Sep 2020

908 791 13612562892980WY 2020

41 12726053.8731 5592240Oct 202025 12666053.4230 4701031Nov 202021 12566052.5331 4601025Dec 202018 12436051.4431 4401022Jan 202127 12416051.3028 4001030Feb 202177 12806054.5431 5362992Mar 2021

128 13546060.5130 8222221170Apr 2021231 14136064.98133 27937437277May 2021195 13126057.13238 38953429224Jun 202174 12926055.5632 99574566Jul 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)900 114773597.12900 911497250260 0Aug 2018* 11670 110283592.28670 690493645230 0Sep 2018H 1

9000 9000 91583865459 0WY 2018 4612

625 108623590.46625 650492330477 0Oct 2018I 351585 105073586.50662 669489429307 77Nov 2018S 254740 100993581.85740 744486222322 0Dec 2018T 228804 96293576.34804 81548247303 0Jan 2019O 212730 92613571.89730 74147957339 0Feb 2019R 255790 90493569.28790 798477811573 0Mar 2019I 624720 91983571.12720 734479018899 0Apr 2019C 1242720 103433584.65720 7524881231980 0May 2019A 2511765 129143611.82765 8085087413583 0Jun 2019L 4206857 139333621.60857 9055168572015 0Jul 2019* 2451

900 138273620.60900 917516058843 0Aug 2019 700686 137653620.02686 700515553672 0Sep 2019 500

8923 9000 923335712313 77WY 2019 13535

640 137493619.87640 650515437660 0Oct 2019 610640 136933619.33640 641514935614 0Nov 2019 580720 136113618.56720 726514328660 0Dec 2019 450760 134383616.90760 77151299582 0Jan 2020 430680 133383615.95680 68951219582 0Feb 2020 450710 132193614.79710 724511116597 0Mar 2020 640640 133793616.34640 655512426839 0Apr 2020 985630 147463629.05630 6415233322138 0May 2020 2250660 164783643.98660 6715372542584 0Jun 2020 2730750 164703643.91750 769537168809 0Jul 2020 870800 161603641.32800 817534667532 0Aug 2020 425600 160193640.14600 614533561509 0Sep 2020 380

8230 8230 836844211107 0WY 2020 10800

640 158633638.81640 650532342514 0Oct 2020 489640 156923637.34640 641530940495 0Nov 2020 462720 154733635.46720 726529232516 0Dec 2020 363860 151213632.38860 871526310489 0Jan 2021 361750 148603630.07750 759524311479 0Feb 2021 393800 146573628.24800 814522618599 0Mar 2021 665710 147983629.51710 725523828890 0Apr 2021 1056710 160623640.50710 7215339352110 0May 2021 2343750 175643652.78750 7615459582430 0Jun 2021 2666850 176273653.28850 869546472990 0Jul 2021 1091



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)

748 99181078.88749 64512.27074900Aug 2018* 28723 98701078.29725 64212.25884670Sep 2018H 24923792405416909000WY 2018 241

634 98891078.52641 64310.442100625Oct 2018I 23689 98721078.32690 64211.64267662Nov 2018S 16467 101321081.46468 6597.63652740Dec 2018T 11486 104931085.75487 6827.930106804Jan 2019O 8620 106821087.97621 69411.228126730Feb 2019R 6737 108781090.24738 70712.032201790Mar 2019I 13900 107671088.95902 70015.239118720Apr 2019C 15988 105551086.48989 68616.145108720May 2019A 18911 104051084.71912 67615.35469765Jun 2019L 27946 102461082.82946 66615.46721857Jul 2019* 33

781 103581084.16781 67312.771100900Aug 2019 28625 104261084.96625 67810.55991686Sep 2019 218783880054711589000WY 2019 219

720 103661084.24720 67411.74382640Oct 2019 23559 104381085.10559 6789.44354640Nov 2019 14332 108051089.40332 7025.43751720Dec 2019 11550 110421092.13550 7189.03183760Jan 2020 9635 111351093.20635 72411.02991680Feb 2020 8959 109081090.59959 70915.63257710Mar 2020 181033 105271086.151033 68417.43949640Apr 2020 22975 101601081.79975 66015.94530630May 2020 31902 98701078.29902 64215.25317660Jun 2020 31811 97931077.36811 63713.26680750Jul 2020 34721 98671078.25721 64111.770100800Aug 2020 31694 97871077.28694 63611.75791600Sep 2020 24889288925457848230WY 2020 257

459 99691079.50459 6487.54282640Oct 2020 26582 100181080.09582 6519.84254640Nov 2020 18543 101861082.10543 6628.83751720Dec 2020 14567 105011085.84567 6839.23083860Jan 2021 9651 106451087.53651 69211.72891750Feb 2021 9975 104871085.68975 68215.93157800Mar 2021 181050 101571081.751050 66017.63949710Apr 2021 23992 98491078.04992 64016.14430710May 2021 32919 96281075.33919 62615.45217750Jun 2021 32828 96301075.36828 62613.56580850Jul 2021 34



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)11.9 1679642.29730073023-13749Aug 2018*13.7 1561637.87814081418-11725Sep 2018H

898108981198-1039240WY 2018

10.3 1540637.08635063515-11641Oct 2018I10.3 1581638.62610061011-28690Nov 2018S6.3 1639640.7938603869-14468Dec 2018T6.8 1668641.89418041810-29487Jan 2019O

10.2 1704643.20569056910-6621Feb 2019R12.2 1687642.577490749137738Mar 2019I14.9 1686642.528860886170902Apr 2019C15.2 1707643.32937093722-9989May 2019A14.9 1696642.89886088625-12912Jun 2019L14.5 1712643.48894089525-11946Jul 2019*

12.7 1678642.25780078023-11781Aug 201912.3 1538637.00735073518-12625Sep 2019

848608486198-1388800WY 2019

11.0 1564638.00676067615-4720Oct 20198.5 1591639.01503050311-19559Nov 20195.2 1583638.7031903199-12332Dec 20197.2 1666641.80441044110-16550Jan 2020

10.6 1666641.80612061210-13635Feb 202014.6 1700643.05896089613-15959Mar 202016.8 1699643.0010010100117-171033Apr 202015.3 1699643.00941094122-11975May 202014.5 1699643.00860086025-16902Jun 202013.0 1671642.00801080125-12811Jul 202011.2 1671642.00687068723-11721Aug 202012.1 1618640.01717071718-12694Sep 2020

845508455198-1598892WY 2020

10.2 1434633.00624062415-4459Oct 20208.4 1486635.00501050110-19582Nov 20206.9 1583638.7142404249-12543Dec 20207.4 1666641.80458045810-16567Jan 202111.3 1666641.80628062810-13651Feb 202114.8 1700643.05912091213-15975Mar 202117.1 1699643.0010180101817-171050Apr 202115.6 1699643.00958095822-11992May 202114.7 1699643.00877087725-16919Jun 202113.3 1671642.00818081825-12828Jul 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)9.9 104447.53611 1.75712217 99Aug 2018* 730 228.6 94448.95512 1.659816415 95Sep 2018H 814 9

15006479 1431139 910WY 2018 8981 100

6.4 68448.12394 1.158217612 86Oct 2018I 635 236.0 97447.99357 1.65801739 85Nov 2018S 610 163.5 105446.53218 1.75521437 70Dec 2018T 386 264.1 122446.58250 2.0553916 87Jan 2019O 418 196.7 143447.53372 2.65711518 31Feb 2019R 569 13

10.2 185447.86630 3.0577839 11Mar 2019I 749 -512.0 170447.29712 2.956714411 28Apr 2019C 886 611.3 128448.62693 2.159215413 51May 2019A 937 812.0 138448.47717 2.358910415 53Jun 2019L 886 1112.0 146448.12739 2.45829217 59Jul 2019* 894 16

10.2 108447.80624 1.85769017 63Aug 2019 780 208.6 100447.50513 1.757115515 61Sep 2019 735 14

15106218 1554140 686WY 2019 8486 167

7.6 62447.50467 1.057017112 43Oct 2019 676 246.0 88447.50358 1.55711159 30Nov 2019 503 144.5 83446.50274 1.4552437 31Dec 2019 319 224.3 121446.50262 2.0552926 95Jan 2020 441 187.5 148446.50431 2.6552928 85Feb 2020 612 1111.5 187446.70706 3.05551579 18Mar 2020 896 512.2 173448.70728 2.959315111 74Apr 2020 1001 1211.3 116448.70695 1.959315713 77May 2020 941 1312.1 124448.70718 2.15935016 74Jun 2020 860 1111.0 131448.00677 2.15805017 77Jul 2020 801 199.7 101447.50598 1.65711317 77Aug 2020 687 208.5 93447.50508 1.657012415 74Sep 2020 717 14

14276422 1215139 754WY 2020 8455 182

7.9 63447.50487 1.057111212 30Oct 2020 624 246.0 96447.50359 1.65711129 29Nov 2020 501 145.1 106446.50311 1.75521127 30Dec 2020 424 224.3 121446.50262 2.05521046 100Jan 2021 458 187.7 148446.50430 2.75521048 90Feb 2021 628 1111.5 187446.70704 3.05551699 23Mar 2021 912 512.2 173448.70727 2.959316311 80Apr 2021 1018 1211.3 116448.70694 1.959316913 83May 2021 958 1312.0 124448.70716 2.15936216 80Jun 2021 877 1111.0 131448.00676 2.15806217 83Jul 2021 818 19



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

MW1562.099181078.88 383.8287.4119 10012.2749Aug 2018* 435.011562.098701078.29 384.7278.7-49 10012.2725Sep 2018H 434.15

3614.39240WY 2018

1406.198891078.52 386.7247.819 8710.4641Oct 2018I 435.29755.098721078.32 385.8266.1-16 4911.6690Nov 2018S 434.47959.9101321081.46 396.6179.6260 617.6453Dec 2018T 438.59

1006.1104931085.75 376.8183.4361 637.9487Jan 2019O 442.101119.0106821087.97 396.7246.4189 7011.2621Feb 2019R 443.821112.0108781090.24 400.6295.7195 7012.0738Mar 2019I 444.26810.1107671088.95 405.2365.4-111 5115.2902Apr 2019C 439.99803.9105551086.48 402.5398.2-211 5116.1989May 2019A 440.79

1591.0104051084.71 393.7359.0-150 10015.3912Jun 2019L 439.381486.0102461082.82 392.7371.7-159 9315.4946Jul 2019* 435.56

1297.0103581084.16 393.6307.4112 8112.7781Aug 2019 432.101600.0104261084.96 383.0239.368 10010.5625Sep 2019 433.24

3460.08785WY 2019

1403.0103661084.24 392.2282.5-61 8811.7720Oct 2019 435.991190.1104381085.10 390.4218.273 749.4559Nov 2019 436.841213.0108051089.40 376.5125.2367 755.4332Dec 2019 439.071145.0110421092.13 392.9216.2237 709.0550Jan 2020 442.251129.0111351093.20 398.9253.393 6811.0635Feb 2020 443.291324.0109081090.59 402.9386.3-227 8115.6959Mar 2020 440.761258.1105271086.15 400.1413.5-381 7817.41033Apr 2020 437.151493.9101601081.79 392.3382.4-367 9415.9975May 2020 431.111576.098701078.29 385.1347.3-290 10015.2902Jun 2020 426.561576.097931077.36 386.0313.1-76 10013.2811Jul 2020 424.691591.098671078.25 381.4275.173 10011.7721Aug 2020 425.001591.097871077.28 381.7264.9-80 10011.7694Sep 2020 425.61

3478.18892WY 2020

1078.199691079.50 389.1178.7182 677.5459Oct 2020 432.001079.0100181080.09 392.7228.549 679.8582Nov 2020 435.681087.1101861082.10 387.0210.0168 688.8543Dec 2020 435.101150.0105011085.84 389.2220.7315 709.2567Jan 2021 435.491131.9106451087.53 397.1258.6144 6811.7651Feb 2021 437.341328.7104871085.68 399.0389.1-158 8115.9975Mar 2021 435.511268.3101571081.75 396.9416.7-331 7817.61050Apr 2021 432.531504.898491078.04 382.6379.4-307 9416.1992May 2021 427.071587.796281075.33 383.0351.8-221 10015.4919Jun 2021 423.241587.696301075.36 384.6318.52 10013.5828Jul 2021 422.24



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

MW255.01679 127.192.7-17 10011.9730Aug 2018* 141.02642.29255.01561 124.3101.2-119 10013.7814Sep 2018H 136.59637.87

1126.38981WY 2018

184.31540 122.477.8-21 7210.3635Oct 2018I 135.95637.08158.11581 128.478.440 6210.3610Nov 2018S 137.20638.62153.01639 122.547.358 606.3386Dec 2018T 140.00640.79159.61668 135.856.830 636.8418Jan 2019O 143.26641.89209.51704 120.968.836 8210.2569Feb 2019R 144.69643.20218.81687 126.694.8-17 8612.2749Mar 2019I 140.17642.57210.81686 126.3111.9-1 8314.9886Apr 2019C 142.03642.52238.61707 127.6119.522 9415.2937May 2019A 139.79643.32255.01696 128.3113.6-12 10014.9886Jun 2019L 140.50642.89255.01712 126.5113.216 10014.5895Jul 2019* 142.50643.48

255.01678 126.198.4-34 10012.7780Aug 2019 139.94642.25255.01538 123.390.6-140 10012.3735Sep 2019 136.84637.00

1071.08486WY 2019

208.91564 121.882.326 8211.0676Oct 2019 135.25638.00153.01591 123.762.227 608.5503Nov 2019 137.31639.01200.71583 125.440.0-8 795.2319Dec 2019 139.16638.70179.31666 125.855.583 707.2441Jan 2020 139.62641.80189.91666 125.877.00 7410.6612Feb 2020 139.68641.80255.01700 125.1112.134 10014.6896Mar 2020 138.83643.05255.01699 124.9125.1-1 10016.81001Apr 2020 138.66643.00255.01699 125.4118.00 10015.3941May 2020 139.15643.00255.01699 125.6108.10 10014.5860Jun 2020 139.44643.00255.01671 125.6100.7-27 10013.0801Jul 2020 139.45642.00255.01671 125.886.50 10011.2687Aug 2020 139.67642.00255.01618 124.689.4-54 10012.1717Sep 2020 138.33640.01

1056.88455WY 2020

208.91434 121.375.7-183 8210.2624Oct 2020 134.59633.00153.01486 119.760.051 608.4501Nov 2020 132.81635.00200.71583 122.852.197 796.9424Dec 2020 136.36638.71179.31666 125.757.683 707.4458Jan 2021 139.51641.80189.41666 125.678.90 7411.3628Feb 2021 139.41641.80255.01700 125.0114.034 10014.8912Mar 2021 138.73643.05255.01699 124.8127.1-1 10017.11018Apr 2021 138.56643.00255.01699 125.3120.00 10015.6958May 2021 139.05643.00255.01699 125.5110.10 10014.7877Jun 2021 139.34643.00255.01671 125.5102.7-27 10013.3818Jul 2021 139.35642.00



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

MW120.0571447.53 69.942.7-9 1009.9611Aug 2018* 79.27120.0598448.95 70.135.927 1008.6512Sep 2018H 83.02

451.76479WY 2018

90.0582448.12 70.927.9-16 756.4394Oct 2018I 82.8393.0580447.99 73.026.1-3 786.0357Nov 2018S 82.25116.1552446.53 59.112.9-27 973.5218Dec 2018T 81.03117.1553446.58 68.217.01 984.1250Jan 2019O 82.7595.4571447.53 68.625.518 796.7372Feb 2019R 81.87111.3577447.86 70.444.36 9310.2630Mar 2019I 82.11115.0567447.29 69.549.5-11 9612.0712Apr 2019C 79.40119.0592448.62 72.248.625 9911.3673May 2019A 80.51120.0589448.47 70.250.3-3 10012.0717Jun 2019L 80.43120.0582448.12 69.551.4-7 10012.0739Jul 2019* 80.11

120.0576447.80 65.741.0-6 10010.2624Aug 2019 75.33120.0571447.50 65.133.4-6 1008.6513Sep 2019 75.03

428.06198WY 2019

90.0570447.50 65.930.80 757.6467Oct 2019 76.2993.0571447.50 65.023.20 786.0358Nov 2019 76.14114.2552446.50 62.617.2-19 954.5274Dec 2019 74.6594.8552446.50 62.716.40 794.3262Jan 2020 75.0793.1552446.50 65.128.00 787.5431Feb 2020 75.16

120.0555446.70 64.945.84 10011.5706Mar 2020 74.01120.0593448.70 65.948.038 10012.2728Apr 2020 75.08120.0593448.70 66.546.20 10011.3695May 2020 76.05120.0593448.70 66.647.80 10012.1718Jun 2020 76.05120.0580448.00 66.144.8-13 10011.0677Jul 2020 75.71120.0571447.50 65.439.1-9 1009.7598Aug 2020 75.13120.0570447.50 65.033.00 1008.5508Sep 2020 74.89

420.46422WY 2020

90.0571447.50 66.132.20 757.9487Oct 2020 76.2992.0571447.50 65.023.40 776.0359Nov 2020 76.19

109.4552446.50 63.319.7-19 915.1311Dec 2020 74.8694.8552446.50 62.716.40 794.3262Jan 2021 75.0792.1552446.50 65.228.10 777.7430Feb 2021 75.21

120.0555446.70 64.945.74 10011.5704Mar 2021 74.01120.0593448.70 65.947.938 10012.2727Apr 2021 75.08120.0593448.70 66.546.10 10011.3694May 2021 76.05120.0593448.70 66.647.70 10012.0716Jun 2021 76.05120.0580448.00 66.144.7-13 10011.0676Jul 2021 75.71



Upper Basin Power


FontenelleReservoir

1000 MWHR

CrystalReservoir

1000 MWHR

GlenCanyon

1000 MWHRDate

FlamingGorge

1000 MWHR

BlueMesa

1000 MWHR

MorrowPoint

1000 MWHR393 19 750 24 33Aug 2018*288 16 147 8 29Sep 2018H

2045 111 36297 133 193Summer 2018268 9 439 11 19Oct 2018I248 2 536 5 4Nov 2018S313 2 547 5 6Dec 2018T335 1 447 4 6Jan 2019O302 1 342 6 8Feb 2019R325 4 322 6 9Mar 2019I

1790 19 24233 36 51Winter 2019294 10 427 9 14Apr 2019C299 21 638 23 45May 2019A332 22 882 33 64Jun 2019L391 23 739 28 54Jul 2019*372 23 743 34 52Aug 2019283 20 348 33 39Sep 2019

1972 119 36278 159 268Summer 2019264 16 628 26 31Oct 2019264 15 626 24 29Nov 2019296 21 662 34 41Dec 2019312 11 562 16 21Jan 2020278 0 558 15 19Feb 2020290 8 429 15 20Mar 2020

1704 71 32265 129 161Winter 2020262 15 528 18 27Apr 2020261 23 729 58 102May 2020281 21 889 20 32Jun 2020324 14 1042 19 25Jul 2020345 14 1045 22 27Aug 2020258 14 244 23 29Sep 2020

1730 102 40275 161 242Summer 2020274 10 525 15 19Oct 2020272 10 524 15 19Nov 2020306 17 543 27 34Dec 2020363 13 543 20 25Jan 2021316 10 438 14 19Feb 2021336 12 422 0 22Mar 2021

1531 59 23172 92 115Winter 2021297 19 522 0 34Apr 2021301 23 724 2 95May 2021324 20 887 17 29Jun 2021372 17 1045 23 29Jul 2021



Flood Control CriteriaBeginning of Month Conditions


NavajoKAFDate

FlamingGorgeKAF

BlueMesaKAF

LakePowell

KAF

Upper BasinTotalKAF

LakeMeadKAF

TotalKAF

FlamingGorgeKAF

BlueMesaKAF

NavajoKAF

LakePowell

KAF

Tot or MaxAllowKAF

LakeMeadKAF

TotalKAF

BOM SpaceRequired

KAF

MeadSched Rel

KAF

MeadFC Rel

KAF

SysContMAF

* * * * P R E D I C T E D S P A C E * * * * * * * * C R E D I T A B L E S P A C E* * * *274 7 165 10388 10835 17131 27966 274 7 165 447 10388 17131 27966 1500 781 0 32.7Aug 2019319 50 218 10495 11081 17019 28099 319 50 218 586 10495 17019 28099 2270 625 0 32.4Sep 2019405 90 257 10557 11308 16951 28259 405 90 257 751 10557 16951 28259 3040 720 0 32.3Oct 2019429 126 253 10573 11381 17011 28392 429 126 253 808 10573 17011 28392 3810 559 0 32.3Nov 2019445 166 242 10629 11482 16939 28421 445 166 242 853 10629 16939 28421 4580 332 0 32.3Dec 2019573 245 246 10711 11775 16572 28347 573 245 246 1064 10711 16572 28347 5350 550 0 32.3Jan 2020

* * * * E F F E C T I V E S P A C E * * * *573 245 246 10711 11775 16572 28347 182 151 50 384 10711 16572 27667 5350 550 0 32.3Jan 2020695 268 252 10884 12099 16335 28434 306 175 56 537 10884 16335 27756 1500 635 0 32.2Feb 2020804 292 251 10984 12331 16242 28573 415 200 54 668 10984 16242 27894 1500 959 0 31.9Mar 2020789 305 222 11103 12420 16469 28889 395 213 18 626 11103 16469 28198 1500 1033 0 31.8Apr 2020738 292 167 10943 12140 16850 28990 336 203 -62 477 10943 16850 28270 1500 975 0 32.9May 2020599 342 174 9576 10691 17217 27908 184 241 -95 330 9576 17217 27123 1500 902 0 34.5Jun 2020511 153 338 7844 8845 17507 26353 87 34 11 132 7844 17507 25483 1500 811 0 34.4Jul 2020

* * * * C R E D I T A B L E S P A C E* * * *442 112 388 7852 8794 17584 26377 442 112 388 942 7852 17584 26377 1500 721 0 34.1Aug 2020502 121 414 8162 9199 17510 26709 502 121 414 1037 8162 17510 26709 2270 694 0 33.7Sep 2020583 149 424 8303 9458 17590 27048 583 149 424 1156 8303 17590 27048 3040 459 0 33.5Oct 2020603 158 424 8459 9644 17408 27052 603 158 424 1186 8459 17408 27052 3810 582 0 33.4Nov 2020623 173 430 8630 9857 17359 27216 623 173 430 1227 8630 17359 27216 4580 543 0 33.2Dec 2020706 240 440 8849 10234 17191 27425 706 240 440 1386 8849 17191 27425 5350 567 0 33.1Jan 2021

* * * * E F F E C T I V E S P A C E * * * *706 240 440 8849 10234 17191 27425 374 128 229 731 8849 17191 26771 5350 567 0 33.1Jan 2021783 283 453 9201 10719 16876 27595 451 171 241 863 9201 16876 26940 1500 651 0 32.9Feb 2021845 309 455 9462 11071 16732 27803 512 198 242 952 9462 16732 27146 1500 975 0 32.7Mar 2021809 328 416 9665 11219 16890 28108 471 219 196 886 9665 16890 27441 1500 1050 0 32.6Apr 2021743 335 342 9524 10944 17220 28165 397 226 97 720 9524 17220 27465 1500 992 0 33.8May 2021577 369 283 8260 9489 17528 27017 217 244 -1 460 8260 17528 26248 1500 919 0 35.3Jun 2021459 191 384 6758 7792 17749 25541 87 42 42 170 6758 17749 24678 1500 828 0 35.4Jul 2021


august 24-month study date: august 15, 2019 · meeting will be held at the water treatment...

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