GCDAMP Glen Canyon Dam - Revision history

Cellsworth at 21:50, 8 September 2026

2026-09-08T21:50:01Z

Cellsworth at 21:49, 8 September 2026

2026-09-08T21:49:02Z

Cellsworth at 21:44, 8 September 2026

2026-09-08T21:44:26Z

Cellsworth at 19:39, 18 August 2026

2026-08-18T19:39:48Z

Cellsworth at 20:23, 18 June 2026

2026-06-18T20:23:18Z

Cellsworth at 20:23, 1 April 2026

2026-04-01T20:23:37Z

Cellsworth at 17:39, 1 April 2026

2026-04-01T17:39:36Z

Cellsworth at 17:22, 1 April 2026

2026-04-01T17:22:44Z

Cellsworth at 16:54, 1 April 2026

2026-04-01T16:54:21Z

Cellsworth at 20:27, 23 March 2026

2026-03-23T20:27:27Z

@@ Line 187: / Line 187: @@
 |style="color:#000;"|
-*[https://www.usbr.gov/uc/DocLibrary/Memos/20240326-EstablishmentInterimOperatingGuidanceGlenCanyonDamLowReservoirLevels-TechnicalDecisionMemo-508-TSC.pdf Glen Canyon Dam Interim Low Elevation Operational Guidance]
+*[https://www.usbr.gov/uc/DocLibrary/Memos/20240326-EstablishmentInterimOperatingGuidanceGlenCanyonDamLowReservoirLevels-TechnicalDecisionMemo-508-TSC.pdf 2024 Glen Canyon Dam Interim Low Elevation Operational Guidance]
 *[[Media:2021_Glen_Canyon_Dam_Interagency_Agreementnwgp_(fully_signed).pd.pdf| 2021 Operating Agreement between Reclamation and WAPA regarding the Operation of Glen Canyon Dam]]
 *[[Media:2017 Glen Canyon Operating Criteria Signed.pdf| 2016 Operating Criteria for Glen Canyon Dam]]

@@ Line 188: / Line 188: @@
 *[https://www.usbr.gov/uc/DocLibrary/Memos/20240326-EstablishmentInterimOperatingGuidanceGlenCanyonDamLowReservoirLevels-TechnicalDecisionMemo-508-TSC.pdf Glen Canyon Dam Interim Low Elevation Operational Guidance]
 *[[Media:2017 Glen Canyon Operating Criteria Signed.pdf| 2016 Operating Criteria for Glen Canyon Dam]]
 *[http://ltempeis.anl.gov/documents/docs/LTEMP_ROD.pdf 2016 LTEMP Record of Decision (ROD)]

@@ Line 207: / Line 207: @@
 '''2026'''
 *[[Media:202606_Information.pdf| June 2026 Operations call]]
 *[[Media:202605_Information.pdf| May 2026 Operations call]]

← Older revision		Revision as of 19:39, 18 August 2026
Line 165:		Line 165:

	There are several other laws, contracts and document which are part of the "Law of the River" in addition to these provisions, the federal Endangered Species Act and various Native American water claim settlements both affect the extent to which water developments and diversions can be utilized in the Colorado River Basin.		There are several other laws, contracts and document which are part of the "Law of the River" in addition to these provisions, the federal Endangered Species Act and various Native American water claim settlements both affect the extent to which water developments and diversions can be utilized in the Colorado River Basin.
		+
		+	\|-
		+	! <h2 style="margin:0; background:#cedff2; font-size:120%; font-weight:bold; border:1px solid #a3b0bf; text-align:left; color:#000; padding:0.2em 0.4em;"> How do operations at Glen Canyon Dam fit into operations with other CRSP hydropower units? </h2>
		+	\|-
		+	\|style="color:#000;"\|
		+
		+	Glen Canyon Dam operates in conjunction with the other CRSP facilities to meet the contractual demands of CRSP customers. Glen Canyon is the largest asset in the CRSP portfolio and provides much of the baseload, with some load following, for CRSP customers. Blue Mesa and Morrow Point provides an example of "hydropeaking" with generation only occurring during peak hours.
		+	[[File:CRSP generation v demand.JPG\|center\|thumb\|600px\|https://www.usbr.gov/uc/progact/amp/twg/2018-01-25-twg-meeting/AR04.pdf]]
		+

	\|}		\|}

@@ Line 198: / Line 198: @@
 '''2026'''
 *[[Media:202603_Information.pdf| March 2026 Operations call]]
 *[[Media:202602_Information.pdf| February 2026 Operations call]]

← Older revision		Revision as of 20:23, 1 April 2026
Line 354:		Line 354:
	*Takes some sort of optimization program (GTMax) that schedules releases when electrical power has the most value		*Takes some sort of optimization program (GTMax) that schedules releases when electrical power has the most value

		+	\|-
		+	! <h2 style="margin:0; background:#cedff2; font-size:120%; font-weight:bold; border:1px solid #a3b0bf; text-align:left; color:#000; padding:0.2em 0.4em;"> What are the minimum monthly volumes while still staying within the ROD daily minimum releases of 5,000 and 8,000 cfs? </h2>
		+	\|-
		+	\|style="color:#000;"\|
		+
		+	{\| class="sortable wikitable" style="text-align:center;"
		+	\|-
		+	!Month
		+	!Minimum Monthly Volume (af)
		+
		+	\|-
		+	\|January\|\|400,950\|\|
		+	\|-
		+	\|February\|\|362,149\|\|
		+	\|-
		+	\|March\|\|400,950\|\|
		+	\|-
		+	\|April\|\|388,017\|\|
		+	\|-
		+	\|May\|\|400,950\|\|
		+	\|-
		+	\|June\|\|388,017\|\|
		+	\|-
		+	\|July\|\|400,950\|\|
		+	\|-
		+	\|August\|\|400,950\|\|
		+	\|-
		+	\|September\|\|388,017\|\|
		+	\|-
		+	\|October\|\|400,950\|\|
		+	\|-
		+	\|November\|\|388,017\|\|
		+	\|-
		+	\|December\|\|400,950\|\|
		+	\|-
		+	\|'''Total'''\|\|'''4,720,868'''\|\|
		+
		+	\|}

	\|-		\|-

@@ Line 283: / Line 283: @@
 *[[Media:Apr2020_Information.pdf| April 2020 Operations call]]
 *[[Media:Mar2020_Information.pdf| March 2020 Operations call]]
 |-
@@ Line 385: / Line 313: @@
 '''Determine the Monthly Volume:'''
-*Above or look at the 24-Month Study
+*Above or look at the [https://www.usbr.gov/uc/water/crsp/studies/index.html 24-Month Study]
 **Example: August, 757,000 AF

@@ Line 355: / Line 355: @@
 '''2003'''
 *[https://pubs.usgs.gov/pp/pp1677/pdf/pp1677.pdf Topping et al. 2003.  Computation and analysis of the instantaneous-discharge record for the Colorado River at Lees Ferry, Arizona, May 8, 1921 through September 30, 2000: U.S. Geological Survey Professional Paper 1677, 118 p.]
 |-
@@ Line 362: / Line 385: @@
 '''Determine the Monthly Volume:'''
-*From the 24-Month Study
+*Above or look at the 24-Month Study
 '''Calculate the Daily Fluctuation Factor: '''
 *June, July, and August: 10% of the Monthly Volume (in cfs)
 *All others: 9% of the Monthly Volume (in cfs)
 '''Determine the Allowable Daily Fluctuation (cfs): '''
 *Multiply the Monthly Volume by the Daily Fluctuation Factor
 '''Determine the Number of Days in the month: <br>
 '''Calculate the Daily Volume (acre feet):'''
 *Divide the Monthly Volume by the Number of Days in the month
 '''Calculate the Mean Daily Discharge (cfs):'''
 *Multiply the Daily Volume by 43560.000627
 *Divide by 86400
 '''Calculate the Base Flow (cfs):'''
 *Divide the Allowable Daily Fluctuation by 2
 *Subtract this number from the Mean Daily Discharge
 '''Calculate the Peak Flow (cfs):'''
 *Divide the Allowable Daily Fluctuation by 2
 *Add this number from the Mean Daily Discharge
 '''Calculate the number of Hours on Peak:'''
 *Takes some sort of solver program (GTMax) to construct a hydrograph that maximizes the number of hours on peak with the available Daily Volume
 '''Calculate the timing of Hours on Peak:'''

← Older revision		Revision as of 20:27, 23 March 2026
Line 198:		Line 198:

	'''2026'''		'''2026'''
		+	*[[Media:202603_Information.pdf\| March 2026 Operations call]]
		+	*[[Media:202602_Information.pdf\| February 2026 Operations call]]
	*[[Media:202601_Information.pdf\| January 2026 Operations call]]		*[[Media:202601_Information.pdf\| January 2026 Operations call]]