Updated: 10/4/21

GLEN CANYON DAM ADAPTIVE MANAGEMENT PROGRAM

TECHNICAL WORK GROUP MEETING

OCTOBER 13-14, 2021 

DAY 1 WEBINAR

https://rec.webex.com/rec/j.php?MTID=m742796aa8930f23dd5779a02e208068b

Call in: (415) 527-5035 | Participant Passcode: 2761 566 7048

Meeting Number: 2761 566 7048 | Meeting Password: TWG13

FINAL AGENDA

STARTS AT 8:30 a.m. Pacific Daylight Time (PDT)

START

TIME

(Duration)

Wednesday, October 13, 2021 (Day 1)

Topic, Presenter, and Purpose

8:30

Pacific 

Time

(:30) 

Welcome and Administrative: Seth Shanahan, Technical Work Group (TWG) Chair 

 Introductions and Determination of Quorum (16 members)

 Adoption of Prior Meeting Minutes 

 Next Meeting Date(s): January 11-13, 2022 

 Ad Hoc Group Membership and Updates 

 Review Action Items, Motions, and Votes Form 

 Update on Program Funding

 Science Advisors Program Status

 Update on Activities Impacted Due to COVID-19 Restrictions 

 Update on Monitoring and Research Trips to Occur From Today Until Next Meeting

9:00

(:60) 

Update on Hydrology, Glen Canyon Dam Operations, and Water Quality Conditions in Lake 

Powell and Below Glen Canyon Dam: Heather Patno and Jeremiah Drewel, Bureau of Reclamation

(Reclamation)

 Presentation (45 minutes)

 Q&A and discussion (15 minutes)

10:00

(:30)

Discuss Dissolved Oxygen: Clarence Fullard and Mike Horn, Reclamation

 Presentation (5 minutes)

 Q&A and discussion (25 minutes)

10:30

(:15) 

BREAK

10:45

(:30)

Colorado River System 5-year Projected Future Conditions and Other Information: Alan Butler,

Reclamation

 Presentation (20 minutes)

 Q&A and discussion (10 minutes)

11:15 

(:15)

Long-Term Hydrologic Projections for the Colorado River Basin and Methods for Considering 

Uncertainty: Jim Prairie, Reclamation

 Presentation (10 minutes)

 Q&A and discussion (5 minutes)

11:30

(:60) LUNCH
Updated: 10/4/21

START

TIME

(Duration)

Wednesday, October 13, 2021 (Day 1)

Topic, Presenter, and Purpose

12:30

(:30)

Current Levels of Threats from Non-Native Aquatic Species in Glen Canyon National Recreation 

Area and Grand Canyon National Park – An Update to Appendix F from the Expanded Non-Native 

Aquatic Species Management Plan Environmental Assessment: Brian Healy, National Park Service 

(NPS) 

 Presentation (15 minutes)

 Q&A and discussion (15 minutes)

1:00

(:30)

Existing and Planned Monitoring of Non-Native Aquatic Species in Lake Powell and Below Glen 

Canyon Dam: Brian Healy, NPS; Ken Hyde, NPS; Clarence Fullard, Reclamation; Jan Boyer, AZGFD; 

GCMRC, et al. 

 Presentation (15 minutes)

 Q&A and discussion (15 minutes)

1:30

(:30)

Addressing Detections of Non-Native Aquatic Species Through Preventative and Reactive 

Actions: Brian Healy, NPS; Ken Hyde, NPS; Jan Boyer, AZGFD; GCMRC; et al.

 Discussion (30 minutes)

2:00

(:15) BREAK

2:15

(:60)

Monitoring Metrics: Helen Fairley, Grand Canyon Monitoring and Research Center (GCMRC)

 Presentation (30 minutes)

 Q&A and discussion (30 minutes)

3:15

(:60)

Projected Climate and Geomorphic Changes in the Little Colorado River Watershed and Potential 

Links to Humpback Chub Habitat: Dave Dean, Joel Unema, and Charles Yackulic, GCMRC

 Presentation (30 minutes) 

 Q&A and discussion (30 minutes)

4:15

(:05) 

Public Comment

4:20 ADJOURN 
Updated: 10/4/21

GLEN CANYON DAM ADAPTIVE MANAGEMENT PROGRAM

TECHNICAL WORK GROUP MEETING

OCTOBER 13-14, 2021 

DAY 2 WEBINAR

https://rec.webex.com/rec/j.php?MTID=m50627cd3cb931e5b2890e36e16b62307

Call in: (415) 527-5035 | Participant Passcode: 2764 404 3653

Meeting Number: 2764 404 3653 | Meeting Password: TWG14

DRAFT AGENDA

STARTS AT 8:30 a.m. Pacific Daylight Time (PDT)

START

TIME

(Duration)

Thursday, October 14, 2021 (Day 2)

Topic, Presenter, and Purpose

8:30

Pacific 

Time

(:30) 

Welcome and Administrative: Seth Shanahan, TWG Chair 

 Introductions and Determination of Quorum (16 members)

 Unresolved Issues from Yesterday’s Meeting 

9:00

(:30) 

Discussion About Possible Experimental and Management Actions That May be Implemented in 

the Next 12 Months and Any Budgeting Issues: Clarence Fullard, Bureau of Reclamation

(Reclamation); and Mike Moran, Grand Canyon Monitoring and Research Center (GCMRC)

 Presentation (10 minutes)

 Q&A and discussion (20 minutes)

9:30

(:30) 

Potential Fall High Flow Experiment (HFE) ≤ 96 Hours or ≤ 192 Hours; Status of Resources 

and Experimental Plan: Lee Traynham, Reclamation; and Mike Moran, GCMRC

 Presentation (15 minutes) 

 Q&A and discussion (15 minutes)

10:00

(:15) 

BREAK

10:15

(:45)

Discuss Temperature Control, Including a Re-Review of the Cooling Capacity of the Bypass Flows 

and Obtaining TWG Input on Refining the Problem Statement: Nick Williams and Clarence 

Fullard, Reclamation 

 Presentation (10 minutes)

 Q&A and discussion (35 minutes)

11:00

(:45)

Morphodynamic Sandbar Model: Erich Mueller, GCMRC

 Presentation (25 minutes)

 Q&A and discussion (20 minutes)

11:45

(:60) LUNCH

12:45

(:45) 

Additional Information Regarding Purchase Power Cost Estimates, Including Assumptions and 

Uncertainty, Such That Effects To Hydropower Are Minimized If Bug Flows Are 

Implemented In The Future: Jerry Wilhite and Clayton Palmer, Western Area Power Administration 

(WAPA)

 Presentation (20 minutes)

 Q&A and discussion (25 minutes)
Updated: 10/4/21

START

TIME

(Duration)

Thursday, October 14, 2021 (Day 2)

Topic, Presenter, and Purpose

1:30

(:45) 

Informational Updates

 Spring Disturbance Flow: Ted Kennedy, GCMRC

 Bug Flow Review: Ted Kennedy, GCMRC

 Rainbow and Brown Trout Status in Lees Ferry: Jan Boyer, AZGFD

 Trout Recruitment, Growth, and Population Dynamics: GCMRC

 Green Sunfish Status and Incentivized Harvest Program Implementation: Ken Hyde, NPS

 Colorado Pikeminnow Reintroduction Feasibility Report: Kim Dibble, GCMRC

2:15

(:15) 

BREAK

2:30

(:30) 

Update on 5-Year Review of Management Triggers for Humpback Chub: Kerri Pedersen,

Reclamation; and Kirk Young, U.S. Fish and Wildlife Service 

 Presentation (10 minutes)

 Q&A and discussion (20 minutes)

3:00

 (:25) 

Peer Review Comments on the GCMRC Fiscal Year 2020 Annual Project Report for the Glen 

Canyon Dam Adaptive Management Program: Dawn Johnson, Senior Biologist, Wood PLC

 Presentation (10 minutes)

 Q&A and discussion (15 minutes)

3:25

 (:30)

2021 Annual Reporting Meeting - Planning: TWG Members  

 Discussion (30 minutes)

3:55 

(:30)

Discussion of Emerging Issues, Updates on Items of Interest That Are in Consideration 

for Implementation Before Next TWG Meeting, and Request for Agenda Items for Next Meeting: 

TWG Members

 Discussion (30 minutes)

4:25

(:05) 

Public Comment

4:30 ADJOURN