LTEMP Metrics - Revision history

Cellsworth at 21:18, 8 September 2026

2026-09-08T21:18:47Z

Cellsworth at 21:16, 8 September 2026

2026-09-08T21:16:19Z

Cellsworth at 21:11, 8 September 2026

2026-09-08T21:11:00Z

Cellsworth at 20:59, 8 September 2026

2026-09-08T20:59:22Z

Cellsworth at 20:53, 8 September 2026

2026-09-08T20:53:28Z

Cellsworth at 20:33, 8 September 2026

2026-09-08T20:33:44Z

Cellsworth at 20:25, 8 September 2026

2026-09-08T20:25:00Z

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==[https://gcdamp.com/index.php?title=CULTURAL '''Cultural and Archaeological Resources''']==

===Resource Goal===
*Maintain the integrity of potentially affected NRHP-eligible or listed historic properties in place, where possible, with preservation methods employed on a site-specific basis.

===Metrics===
*Integrity
*Topographic Change at a Sample of Sites
*Change in Vulnerability to Loss of Integrity

==[https://gcdamp.com/index.php?title=ECOSYSTEM '''Natural Processes''']==

===Resource Goal===
*Restore, to the extent practicable, ecological patterns and processes within their range of natural variability, including the natural abundance, diversity, and genetic and ecological integrity of the plant and animal species native to those ecosystems.

===Metrics===
*Deviation from Natural Flow Metric ( with “sub-metrics”: spring-early summer, late summer-fall, and winter deviation from natural flows)
*Sub-daily Flow Fluctuation Metric
*Springtime Gross Primary Productivity
*Percent EPT Metric

==[https://gcdamp.com/index.php/Humpback_Chub_Page '''Humpback Chub''']==

===Resource Goal===
*Meet humpback chub recovery goals, including maintaining a self-sustaining population, spawning habitat, and aggregations in the Colorado River and its tributaries below the Glen Canyon Dam.

===Metrics===
*Current Biological Opinion tier of humpback chub in the Little Colorado River (LCR) Aggregation
*Grand Canyon-wide abundance of adult humpback chub
*Proportion of Grand Canyon Ecosystem with evidence of all three life stages of humpback chub

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		+	==LTEMP Metrics==
	Section 6.1 (c) of the 2016 LTEMP ROD states that “The DOI, in consultation with the Adaptive Management Working Group, will develop monitoring metrics for the goals and objectives using those in Appendix C of the FEIS as a starting point” (DOI, 2016b). Appendix C refers to a suite of “performance metrics” developed by Runge and others (2015) for evaluating the relative merits of the seven alternatives evaluated in the 2016 EIS. Those metrics were “intended to be objective measures of the performance of alternatives relative to goals for each affected resource being evaluated in the LTEMP EIS” (Runge and others, 2015). Comparisons of the performance of those metrics, among other considerations, ultimately led to selection of Alternative D as the preferred alternative.		Section 6.1 (c) of the 2016 LTEMP ROD states that “The DOI, in consultation with the Adaptive Management Working Group, will develop monitoring metrics for the goals and objectives using those in Appendix C of the FEIS as a starting point” (DOI, 2016b). Appendix C refers to a suite of “performance metrics” developed by Runge and others (2015) for evaluating the relative merits of the seven alternatives evaluated in the 2016 EIS. Those metrics were “intended to be objective measures of the performance of alternatives relative to goals for each affected resource being evaluated in the LTEMP EIS” (Runge and others, 2015). Comparisons of the performance of those metrics, among other considerations, ultimately led to selection of Alternative D as the preferred alternative.

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 *Nonnative Invasive Species
 *[https://gcdamp.com/index.php/File:Goal_11_Riparian_Vegetation.jpg Riparian Vegetation]
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 *[https://gcdamp.com/index.php/File:Goal_2_Natural_Processes_Metrics.jpg Natural Processes]
 *[https://gcdamp.com/images_gcdamp_com/2/2e/BAO_Approved_POSTER_Dzul_IP-186132_HBC_Metrics_2025_v3%2C1-28-2026.pdf Humpback Chub]
-*Hydropower and Energy
+*[[Media:BAO_Approved-Hydropower_Metrics_Poster-MAnderson_20260122_1511.pdf|Hydropower and Energy]]
 *Other Native Fish
-*Recreational Experience
+*[[Media:BAO_Approved-Recreation_Metrics_Poster-MAnderson_20260122.pdf|Recreational Experience]]
 *Sediment
-*Tribal Perspectives
+*[[Media:BAO_Approved-Tribal_MetricsPoster,MAnderson_20260128_1022.pdf|Tribal Perspectives]]
 *Rainbow Trout Fishery
 *Nonnative Invasive Species

← Older revision		Revision as of 20:53, 8 September 2026
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	*[https://gcdamp.com/index.php/File:Goal_2_Natural_Processes_Metrics.jpg Natural Processes]		*[https://gcdamp.com/index.php/File:Goal_2_Natural_Processes_Metrics.jpg Natural Processes]
	*[https://gcdamp.com/images_gcdamp_com/2/2e/BAO_Approved_POSTER_Dzul_IP-186132_HBC_Metrics_2025_v3%2C1-28-2026.pdf Humpback Chub]		*[https://gcdamp.com/images_gcdamp_com/2/2e/BAO_Approved_POSTER_Dzul_IP-186132_HBC_Metrics_2025_v3%2C1-28-2026.pdf Humpback Chub]
		+	*Hydropower and Energy
		+	*Other Native Fish
		+	*Recreational Experience
		+	*Sediment
		+	*Tribal Perspectives
		+	*Rainbow Trout Fishery
		+	*Nonnative Invasive Species
		+	*[https://gcdamp.com/index.php/File:Goal_11_Riparian_Vegetation.jpg Riparian Vegetation]

← Older revision	Revision as of 20:25, 8 September 2026
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	+	==[https://gcdamp.com/index.php/HYDROPOWER '''Hydropower and Energy ''']==

	+	===Resource Goal===
	+	*Maintain or increase Glen Canyon Dam electric energy generation, load following capability, and ramp rate capability, and minimize emissions and costs to the greatest extent practicable, consistent with improvement and long-term sustainability of downstream resources.
	+
	+	===Metrics===
	+	*Glen Canyon Dam Energy Production
	+	*Economic Value of Glen Canyon Dam Energy Production
	+	*Marketable Capacity of Glen Canyon Dam Energy
	+
	+
	+	==[https://gcdamp.com/index.php/FISH '''Other Native Fish Species''']==
	+
	+	===Resource Goal===
	+	*Maintain self-sustaining native fish species populations and their habitats in their natural ranges on the Colorado River and its tributaries.
	+
	+	===Metrics===
	+	*Proportion of Grand Canyon Ecosystem (GCE) with evidence of all 3 life stages of Bluehead Sucker (Catostomus discobolus), Flannelmouth Sucker (Catostomus latipinnis), Razorback Sucker (Xyrauchen texanus)
	+	*Proportion of GCE with Speckled Dace (Rhinichthys osculus) (any life stage)
	+	*Proportion of GCE with extirpated species (any life stage)
	+
	+
	+	==[https://gcdamp.com/index.php?title=RECREATION '''Recreational Experience''']==
	+
	+	===Resource Goal===
	+	*Maintain and improve the quality of recreational experiences for the users of the Colorado River Ecosystem. Recreation includes, but is not limited to, flatwater and whitewater boating, river corridor camping, and angling in Glen Canyon.
	+
	+	===Metrics===
	+	*Economic Value of Recreation Experience
	+
	+
	+	==[https://gcdamp.com/index.php?title=GCDAMP_Sediment '''Sediment''']==
	+
	+	===Resource Goal===
	+	*Increase and retain fine sediment volume, area, and distribution in the Glen, Marble, and Grand Canyon reaches above the elevation of the average base flow for ecological, cultural, and recreational purposes.
	+
	+	===Metrics===
	+	Performance Metric:
	+	*Sand Bar Volume (includes multiple “sub-metrics”, e.g., normalized sandbar volume by type, mean sand bar response to HFEs)
	+
	+	Surveillance Metrics:
	+	*Sand Supply By River Segment (Sand Mass Balance)
	+	*Silt & Clay Retention by River Segment (Turbidity)
	+
	+
	+	==[https://gcdamp.com/index.php/Tribal_Resources '''Tribal Perspectives''']==
	+
	+	===Resource Goal===
	+	*Maintain the diverse values and resources of traditionally associated Tribes along the Colorado River corridor through Glen, Marble, and Grand Canyons.
	+
	+	===Metrics===
	+	*Is the Colorado River ecosystem healthy? Please explain why or why not.
	+	*How well is LTEMP doing at meeting its goals? Please explain the basis for your assessment.
	+	*Overall, is the Grand Canyon doing better, worse, or about the same as last year? Please explain the basis for your assessment.
	+
	+
	+	==[https://gcdamp.com/index.php?title=FISHERY '''Rainbow Trout Fishery''']==
	+
	+	===Resource Goal===
	+	*Achieve a healthy high-quality recreational rainbow trout fishery in GCNRA and reduce or eliminate downstream trout migration consistent with NPS fish management and ESA compliance.
	+
	+	===Metrics===
	+	*Trout Angler Catch Rate
	+	*Rainbow Trout (Oncorhynchus mykiss) Abundance
	+
	+
	+	==[https://gcdamp.com/index.php/Nonnative_Invasive_Aquatic_Species '''Nonnative Invasive Species''']==
	+
	+	===Resource Goal===
	+	*Minimize or reduce the presence and expansion of aquatic nonnative invasive species.
	+
	+	===Metrics===
	+	*Average number of “risky species” per Habitat Segment in Grand Canyon Ecosystem
	+	*Average number of “risky species” with evidence of recent recruitment per Habitat Segment in Grand Canyon Ecosystem
	+
	+
	+	==[https://gcdamp.com/index.php/Riparian_Vegetation '''Riparian Vegetation''']==
	+
	+	===Resource Goal===
	+	*Maintain native vegetation and wildlife habitat, in various stages of maturity, such that they are diverse, healthy, productive, self-sustaining, and ecologically appropriate.
	+
	+	===Metrics===
	+	*Total Plant Cover
	+	*Native Plant Richness
	+	*Native to Non-native Plant Species Cover Ratio

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