Glen Canyon Dam Adaptive Management Program 

Annual Reporting Meeting 2023 

Crowne Plaza Hotel 

4300 East Washington Street, Phoenix, AZ 85034 

Tuesday Jan. 24 | 8:30 a.m. - 5 p.m. MDT 

WEBINAR: https://rec.webex.com/rec/j.php?MTID=m1843da24942daa18492079fd4dacab0a 

Call in (415) 527-5035 | Participant Passcode: 2761 837 1561 

Meeting Number: 2761 837 1561 | Meeting Password: AR24 

TIME Tuesday, January 24, 2023 

8:30-8:35 

(:05) 

Welcome and Administrative: Seth Shanahan, TWG Chair, and Scott VanderKooi, Director USGS 

Southwest Biological Science Center 

8:35-9:05 

(:30) Round-Table Introductions 

Natural Processes/Aquatic Food Base 

9:05-9:20 

(:15) Bug Flows and Food Base Update, Ted Kennedy, GCMRC 

9:25-9:40 

(:15) 

Molecular and Modeling Tools for Tracking Food Base Dynamics in Changing Environments, 

Dave Lytle, Oregon State University 

9:45-10:00 

(:15) 

Production and Nutrient Content of Benthic Algae in the Glen Canyon Section of the Colorado 

River, Mia Wrey, Fordham University 

10:05-10:15 

(:10) BREAK 

10:15-10:30 

(:15) 

Predicting Water Quality in Lake Powell: Updates and Improvements to the Existing Mechanistic 

Model, Bryce Mihalevich, GCMRC 

10:35-10:55 

(:20) 

Dissolved Oxygen Dynamics in Lake Powell and in the Glen Canyon Tailwater, Bridget Deemer, 

GCMRC 

Humpback Chub 

11:00-11:50 

(:50) 

Humpback Chub Population Dynamics in Grand Canyon, Randy Van Haverbeke, USFWS, and Maria 

Dzul, GCMRC 

11:55-1:05 

(1:10) LUNCH 

1:05-1:20 

(:15) 

2022 NPS Update- Humpback Chub Translocation Monitoring and Associated Nonnative Trout 

Removal, Emily Omana Smith, NPS 

Trout Fishery 

1:25-2:05 

(:40) 

Trout Recruitment and Growth Dynamics in Glen Canyon, AZ, Mariah Giardina, GCMRC, and Josh 

Korman, Ecometric 

2:10-2:25 

(:15) 

Applying Ultrasonography in a High-Throughput Setting to Describe the Reproductive Potential 

of Brown and Rainbow Trout, James Crossman, Cross Ecology, Molly Webb, USFWS, and Josh 

Korman, Ecometric 

2:30-2:40 

(:10) BREAK 

2:40-2:55 

(:15) 

What Do We Know After Two Years of the Brown Trout Incentivized Harvest Program? Lucas Bair, 

GCMRC 

3:00-3:15 

(:15) Lees Ferry Fishery AZGFD, David Rogowski, AZGFD 

Other Native Fish/Nonnative Invasive Species 

3:20-3:35 

(:15) Grand Canyon Fish Monitoring, David Rogowski, AZGFD 

3:40-3:55 

(:15) 

Predation Risk Posed by Introduced Warm-Water Predators, David Ward, Eric Frye, Laura Tennant 

and Clay Nelson, GCMRC 

4:00-4:20 

(:20) Smallmouth Bass Depletion Effort in Glen Canyon, Laura Tennant, GCMRC 

Future Conditions 

4:25-5:00 

(:35) 

Implications of Lower Lake Powell Elevations and/or Annual Releases on Grand Canyon 

Resources, Charles Yackulic and group discussion 

5:30 – 7:00 POSTER SESSION (list of posters attached) 
 

 

 

 

 

 

 

 

 

 

 

Poster Session - Crowne Plaza Hotel, 4300 E Washington St, Phoenix, AZ, Tuesday, January 24, 2023, 5:30-7:00 PM 

Poster Title Author 

Sediment 

Riverbed Response to the 2021 Spring Disturbance Flow in Western Grand Canyon Matt Kaplinski and others, 

GCMRC 

Numerical Modeling of Mud Transport, Storage and Release on the Colorado River, 

Arizona Gerard Salter and others, GCMRC 

Drivers of Sandbar and Campsite Erosion and Deposition Robert Tusso and others, 

GCMRC 

Data visualization and management 

Modernizing data telemetry efforts for important riparian resources in the 

Grand Canyon 

Thomas Gushue and Joseph 

Thomas (GCMRC) 

Accessing Grand Canyon Resource Monitoring Information Through Data 

Visualizations 

Tom Gushue, Joseph Thomas, 

Caitlin Andrews, Erica Byerley 

and others, GCMRC 

Colorado River Online Data Resources 

Tom Gushue, Joseph Thomas, 

Caitlin Andrews, Erica Byerley 

and others, GCMRC 

Glen Canyon Dam Adaptive Management Program Wiki: A one-stop shop for 

information. Craig Ellsworth 

Water Quality 

Visualizing Over 60 Years of Data at Lake Powell Caitlin Andrews, GCMRC 

Riparian Vegetation/Archaeological Sites 

Riparian Vegetation Status and Trends Emily Palmquist, GCMRC 

LTEMP Experimental Vegetation Treatments in Grand Canyon National Park 

Lonnie Pilkington, Daniel 

Boughter, Cameron Prophet & 

Ashton Bedford, NPS 

LTEMP Vegetation Management Experiments to Improve the Geomorphic Condition 

of Archaeological Sites in GRCA: Preliminary Results 

Joshua Caster and others, GCMRC 

and NPS 

Fisheries 

Predictive Models for Adaptive Management- Brown Trout Lucas Bair, GCMRC 

Green Sunfish: Aquatic Gremlins of the Southwest Eric Frye & David Ward, GCMRC 

Aquatic Food Base 

Gross Primary Productivity in Marble and Grand Canyon Lindsay E. Hansen, GCMRC 

A deep dive on net-spinning caddisflies (Hydropsyche oslari): 

Measurements of body size and stable isotope ratio for adult caddisflies provides 

insights into growing conditions during the Bug Flow experiment. 

Megan Starbuck, Anya 

Metcalfe, Jeff Muehlbauer, Ted 

Kennedy 
 

 

 

 

 

 

 

Wednesday Jan. 25 | 8:30 a.m. - 5 p.m. MDT 

WEBINAR: https://rec.webex.com/rec/j.php?MTID=m0af636e0e091f89145ad77ac2461e191 

Call in (415) 527-5035 | Participant Passcode: 2760 181 8675 

Meeting Number: 2760 181 8675 | Meeting Password: AR25 

TIME Wednesday, January 25, 2023 

8:30-8:35 

(:05) 

Morning Welcome 

Sediment 

8:35-9:05 

(:30) Project A Update and Evaluation of LTEMP Sand Management, David Topping, GCMRC 

9:10-9:30 

(:20) 

Project B Overview and Evaluation of High-Flow Experiments During Aridification, Paul Grams, 

GCMRC 

9:35-9:55 

(:20) 

Sandbars and Campsites: Response to High-Flow Experiments and Recent Trends, Katie Chapman 

+ others, NAU and GCMRC

10:00-10:15 

(:15) BREAK 

10:15-10:30 

(:15) Overflight Remote Sensing, Joel Sankey, GCMRC 

10:35-10:55 

(:20) 

A Continuous High-Resolution Profile of the Riverbed and Water Surface for 460-km of the 

Colorado River in Grand Canyon, Arizona, Shannon Sartain and others, GCMRC 

11:00-11:20 

(:20) 

Streamflow, Sediment and Vegetation Dynamics; Implications for Geomorphic Change in the 

Colorado River and its Tributaries, Dave Dean, GCMRC 

Hydropower and Energy Resources 

11:25-11:45 

(:20) Glen Canyon Hydropower Production & Value: Status & Trends, Clayton Palmer WAPA 

11:50-1:00 

(1:10) LUNCH 

Tribal Perspectives 

1:00-1:20 

(:20) Hopi River Monitoring, Jakob Masse, Hopi Tribe 

1:25-1:40 

(:15) Navajo Nation Monitoring Update, Erik Stanfield Navajo Nation 

1:45-2:05 

(:20) 

What of Invasive Species of Thought? Identifying the Legacies of the Glen Canyon Adaptive 

Management Program and its Sciences in Practice, Edward Wemytewa, Giorgio Hadi Curti and Kurt 

Dongoske, Pueblo of Zuni 

2:10-2:30 

(:20) 

Learning from the Colonial Legacies of the Glen Canyon Dam Adaptive Management Program 

(GCDAMP): Braiding Indigenous Knowledge and Western Science to Re-Center Indigenous 

Stewardship of Traditional Cultural Landscapes, Dr. Ora Marek-Martinez, NAU 

2:35-2:50 

(:15) Tribal Perspectives, Question and Answer, Group Discussion 

2:50-3:00 

(:10) BREAK 

Archeological and Cultural Sites 

3:00-3:20 

(:20) 

Archaeological Sites are Eroding in Grand Canyon: Floods, Low Flows and Vegetation 

Management Can Help, Joel Sankey, GCMRC 

3:25-3:45 

(:20) 

50 Years of Ecological Change to Campsites in the Riparian Zone along the Colorado River in 

Grand Canyon National Park, Arizona, Helen Fairley, GCMRC 

3:50-4:05 

(:15) Riparian Restoration at Paria Beach, Kelly Burke, GCWC 

Riparian Vegetation 

4:10-4:30 

(:20) Riparian Vegetation Research and Modeling, Brad Butterfield, NAU 

4:35-4:50 

(:15) 

The Changing Status and Role of Common Reed (phragmites australis) along the Colorado River 

Downstream from Glen Canyon Dam, Arizona, Larry Stevens, GCWC 

4:55-5:00 

(:05) Wrap Up, Scott Vanderkooi 

5:00 Adjourn