Difference between revisions of "GCDAMP History Time-Line -Years"
From Glen Canyon Dam AMP
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| − | + | ==2027== | |
| − | == | + | ==2026== |
| − | * | + | *Start of [https://gcdamp.com/index.php/2027-2028_Operating_Guidelines 2027-2028 Operating Guidelines] |
| − | + | ||
| − | == | + | ==2025== |
| − | * | + | *[https://gcdamp.com/index.php/SEIS_Bypass_Releases SEIS Bypass Releases] (CoolMix) to control smallmouth bass |
| − | == | + | ==2024== |
| − | * | + | *[https://gcdamp.com/index.php/SEIS_Bypass_Releases SEIS Bypass Releases] (CoolMix) to control smallmouth bass |
| − | == | + | ==2023== |
| − | * | + | *[[The 2023 Spring HFE| The 2023 Spring HFE: 39,500 cfs for 72h]] |
| − | == | + | ==2022== |
| − | *[http:// | + | *[[A 2022 Fall HFE| A 2022 Fall HFE]] was not conducted due to the discovery of [http://gcdamp.com/index.php/Smallmouth_Bass_Page smallmouth bass] in Glen Canyon (1,600,000 mt) |
| + | *[https://gcdamp.com/index.php/The_Bugflow_Experiment The 2022 Bugflow Experiment] | ||
| − | == | + | ==2021== |
| − | * | + | *[http://gcdamp.com/index.php?title=Spring_Disturbance_Flow The 2021 Spring Disturbance Flow] |
| − | == | + | ==2020== |
| − | * | + | *[https://gcdamp.com/index.php/The_Bugflow_Experiment The 2020 Bugflow Experiment] |
| + | *COVID moves all meetings for the year to remote | ||
| − | == | + | ==2019== |
| − | * | + | *[https://gcdamp.com/index.php/The_Bugflow_Experiment The 2019 Bugflow Experiment] |
| − | == | + | ==2018== |
| − | * | + | *[[The 2018 Fall HFE]]: 38,100 cfs for 60h |
| + | *[https://gcdamp.com/index.php/The_Bugflow_Experiment The 2018 Bugflow Experiment] | ||
| − | == | + | ==2017== |
| − | + | ||
| − | == | + | ==2016== |
| − | * | + | *Publication of the LTEMP EIS |
| + | *[https://pubs.usgs.gov/of/2017/1006/ofr20171006.pdf LTEMP Science Plan] | ||
| + | *[https://www.usbr.gov/uc/progact/amp/twg/2016-10-18-twg-meeting/Attach_09b.pdf TWG Protocol Paper] | ||
| − | == | + | ==2015== |
| + | *[http://gcdamp.com/index.php?title=GCDAMP-_HFE_2015 A 2015 Fall HFE] was canceled due to the discovery of [http://gcdamp.com/index.php?title=Green_Sunfish_Page green sunfish] in Glen Canyon (1,168,000 mt) | ||
| + | *Start of a Triennial Budget and Workplan | ||
| − | + | ==2014== | |
| − | * | + | *[http://gcdamp.com/index.php?title=GCDAMP-_HFE_2014 The 2014 Fall HFE]: 37,500 cfs for 96h |
| − | == | + | ==2013== |
| − | * | + | *[http://gcdamp.com/index.php?title=GCDAMP-_HFE_2013 The 2013 Fall HFE]: 34,100 cfs for 96h |
| − | == | + | ==2012== |
| − | *[ | + | *Publication of the High Flow Experiment Protocol |
| − | * | + | *[http://gcdamp.com/index.php?title=GCDAMP-_HFE_2012 The 2012 Fall HFE]: 42,300 cfs for 96h (slow downramp) |
| + | *Razorback Sucker found in lower part of Grand Canyon- believed the fish traveled some 50 miles upstream from Lake Mead. Last one recorded had been caught in 1990. | ||
| − | == | + | ==2011== |
| − | * | + | *[http://gcdamp.com/index.php?title=Near_Shore_Ecology_(NSE)_Study 2009-2011 Fall Steady Flow Experiment] |
| + | *The 2011 Equalization flows | ||
| + | *Start of a Biennial Budget and Workplan | ||
| + | *[https://gcdamp.com/index.php/Core_Monitoring_Plan Core Monitoring Plan (draft)] | ||
| − | == | + | ==2010== |
| − | * | + | *[http://gcdamp.com/index.php?title=Near_Shore_Ecology_(NSE)_Study 2009-2011 Fall Steady Flow Experiment] |
| − | == | + | ==2009== |
| − | * | + | *[http://gcdamp.com/index.php?title=Near_Shore_Ecology_(NSE)_Study 2009-2011 Fall Steady Flow Experiment] |
| − | == | + | ==2008== |
| − | * | + | *[http://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1153&context=govdocs The 2008 Spring HFE] |
| − | == | + | ==2007== |
| − | * | + | *[https://gcdamp.com/index.php/Interim_Guidelines Beginning of Interim Guidelines for Lower Basin Shortages (2007-2027)] |
| + | *[https://gcdamp.com/index.php/Strategic_Science_Plan Strategic Science Plan] | ||
| − | == | + | ==2006== |
| + | *Long-Term Experimental Plan Environmental Plan (LTEP) | ||
| + | |||
| + | ==2005== | ||
| − | == | + | ==2004== |
| − | * | + | *[https://pubs.usgs.gov/fs/2011/3012/ The 2004 Fall HFE] |
| + | *[https://gcdamp.com/index.php/GCDAMP_Budget#:~:text=2004%20GCDAMP%20Goals%20and%20AMWG%20Priority%20Questions GCDAMP Goals and AMWG Priority Questions] | ||
| − | == | + | ==2003== |
| − | * | + | *Experiment begun to remove nonnative trout from the Colorado River in Grand Canyon. |
| + | *Fluctuating nonnative fish suppression releases from January through March implemented and continued through 2005. | ||
| − | == | + | ==2002== |
| − | * | + | *U.S. Fish and Wildlife Service announces recovery goals for endangered fishes of the Colorado River Basin. |
| − | * | + | *Adaptive Management Work Group recommends implementation of the first 2 yr of an experimental design proposed by the GCMRC. |
| − | == | + | ==2001== |
| − | *Grand Canyon | + | *Humpback Chub population in Grand Canyon was in decline in the 1990s, and reached a low of about 5,000 adult fish in 2001. |
| + | *Draft ''Strategic Plan for the GCDAMP'' developed by program managers. | ||
| − | == | + | ==2000== |
| − | * | + | *[[The 2000 Low Summer Steady Flow Experiment| The 2000 Low Steady Summer Flow Experiment (LSSF)]] |
| + | *Second and third tests of the habitat maintenance flows concept conducted in spring and summer. | ||
| − | == | + | ==1999== |
| − | * | + | *AMWG Colorado River trip to develop the Vision Statement for the GCDAMP |
| − | + | ||
| − | == | + | ==1998== |
| − | * | + | |
| − | * | + | ==1997== |
| + | *The AMWG held their first meeting on September 10-11, 1997, and officially formed the Glen Canyon Technical Work Group (TWG) as a subgroup to work on tasks charged to them by the AMWG. | ||
| + | *The TWG was formed to provide stakeholders with involvement in federal decisions concerning the operation of Glen Canyon Dam and Power Plant. | ||
| + | *[[The 1997 Habitat Maintenance Flow (HMF)]] | ||
| + | *Strategic Planning Subcommittee (1997-2000) | ||
| + | *AMWG and TWG fully established | ||
| − | == | + | ==1996== |
| − | * | + | *[[The 1996 Spring HFE| The 1996 Beach/Habitat-Building Flow (BHBF)]] |
| + | *Record of Decision on the Operation of Glen Canyon Dam Final Environmental Impact Statement to comply with consultation requirements of the Grand Canyon Protection Act of 1992. (Signed by Secretary of the Interior Bruce Babbitt) | ||
| − | == | + | ==1995== |
| − | * | + | *Establishment of the Grand Canyon Monitoring and Research Center |
| − | * | + | *Transition Work Group to act as a bridge between GCES and GCDAMP (1995-1996) |
| − | == | + | ==1994== |
| − | *[http://www. | + | *Programmatic Agreement on Cultural Resources signed between the State of Arizona, Department of the Interior agencies, and six tribes over protection of cultural resources in the river corridor below Glen Canyon Dam. |
| − | + | *U.S. Fish and Wildlife Service designates critical habitat for four species of endangered Colorado River fish and completes Biological Opinion outlining reasonable and prudent alternatives that must be evaluated for dam operation. | |
| + | *Memorandum of Agreement signed for development of a Lower Colorado River Multi-Species Conservation Plan between state agencies in Nevada, California, and Arizona and federal agencies, including the Bureau of Land Management, Bureau of Reclamation, Fish and Wildlife Service, and the National Park Service.[http://www.sci.sdsu.edu/salton/LowerColoradoRiverMSCP.html MSCP History (SDSU)] | ||
| − | == | + | ==1993== |
| − | + | ||
| + | ==1992== | ||
| + | *[http://www.usbr.gov/uc/legal/gcpa1992.html Grand Canyon Protection Act of 1992] passed | ||
| − | == | + | ==1991== |
| − | * | + | *The 1990-91 Experimental Flows |
| − | + | *Interim operating criteria for Glen Canyon Dam implemented. | |
| + | *Razorback Sucker and Kanab Ambersnail federally listed as endangered. | ||
| − | == | + | ==1990== |
| − | * | + | *The 1990-91 Experimental Flows |
| − | + | *Beginning of Interim Operating Criteria | |
| − | + | ||
| − | * | + | |
| − | + | ||
==1989== | ==1989== | ||
| Line 120: | Line 142: | ||
*National Research Council sponsors [https://www.nationalacademies.org/publications/1832 symposium] that reviews existing knowledge on Colorado River ecosystem | *National Research Council sponsors [https://www.nationalacademies.org/publications/1832 symposium] that reviews existing knowledge on Colorado River ecosystem | ||
| − | == | + | ==1988== |
| − | * | + | *Salt Lake City Area Integrated Projects(CRSP)passed-1989 after a series of public information and comment forums. |
| − | * | + | *Glen Canyon Environmental Studies issues [http://archive.library.nau.edu/utils/getfile/collection/cpa/id/61166/filename/61167.pdf ''Glen Canyon Environmental Studies Final Report''], completing Phase I and starting Phase II (1988-1988), which would be accelerated to support environmental impact statement process. |
| − | == | + | ==1987== |
| − | * | + | *National Research Council completes review of Glen Canyon Environmental Studies, publishing [http://archive.org/details/riverdammanageme00unse River and Dam Management: a Review of the Bureau of Reclamation's Glen Canyon Environmental Studies] |
| − | + | ||
| − | + | ||
| − | == | + | ==1986== |
| − | *[http://www. | + | *[http://www.riversimulator.org/Resources/GCDAMP/GCDAMPchronicle/1983FloodGCDhannon.pdf The 1983-86 Floods] |
| + | |||
| + | ==1985== | ||
| + | *[http://www.riversimulator.org/Resources/GCDAMP/GCDAMPchronicle/1983FloodGCDhannon.pdf The 1983-86 Floods] | ||
| − | == | + | ==1984== |
| + | *[http://www.riversimulator.org/Resources/GCDAMP/GCDAMPchronicle/1983FloodGCDhannon.pdf The 1983-86 Floods] | ||
| + | *One of the last Razorback Suckers seen in Grand Canyon is caught and released at Bass Rapids | ||
| − | == | + | ==1983== |
| − | * | + | *[http://www.riversimulator.org/Resources/GCDAMP/GCDAMPchronicle/1983FloodGCDhannon.pdf The 1983-86 Floods] |
| − | + | *Glen Canyon Dam releases more than 92,000 cfs to stop Lake Powell from overtopping Glen Canyon Dam. | |
| − | + | ||
| − | == | + | ==1982== |
| − | * | + | *Glen Canyon Environmental Studies - Phase I (1982-1988) created to study effects of Glen Canyon Dam operations |
| − | + | ||
| − | == | + | ==1980== |
| − | * | + | *Lake Powell reaches full pool (3,700 ft) |
| − | * | + | *Bonytail chub listed as endangered |
| − | == | + | ==1979== |
| − | * | + | *Grand Canyon National Park designated a UNESCO World Heritage Site |
| − | * | + | *USBR proposes an upgrade of Glen Canyon Dam's generators |
| − | + | ||
| − | + | ||
| − | + | ||
| − | == | + | ==1978== |
| − | + | *U.S. Fish and Wildlife Service files jeopardy opinion on the effects of Glen Canyon Dam on endangered fishes | |
| − | + | ||
| − | * | + | |
| − | == | + | ==1975== |
| − | * | + | *Grand Canyon National Park Enlargement Act passed |
| − | + | ||
| − | == | + | ==1974== |
| − | * | + | *Colorado River Basin Salinity Control Act authorized the construction, operation, and maintenance of works in the Colorado River Basin to control the salinity of Colorado River water available for use in the United States and Mexico. Some GCDAMP stakeholders participate in the Salinity Control Forums created by the act. |
| − | + | *First Lawsuit filed over Glen Canyon Dam operations by commercial raft operators contending that the disruption of normal flows was interfering with their ability to conduct river trips. | |
| − | == | + | ==1973== |
| − | * | + | *Endangered Species Act (ESA) of 1973 passed to protect and promote the recovery of animals and plants that are in danger of becoming extinct because of the activities of people. Administered by the US Fish and Wildlife Service. |
| − | + | ||
| − | == | + | ==1972== |
| − | * | + | *Last verified record of Colorado Pikeminnow caught in Grand Canyon at Havasu Creek |
| − | + | ||
| − | == | + | ==1971== |
| − | + | ||
| − | + | ||
| − | == | + | ==1970== |
| + | *Long-range Operating Criteria developed for Glen Canyon Dam operations | ||
| − | + | ==1969== | |
| − | == | + | *National Environmental Policy Act (NEPA) of 1969 passed requiring Federal agencies to consider the environmental impacts of their proposed actions and reasonable alternatives to those actions. |
| − | * | + | |
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | == | + | ==1968== |
| − | * | + | *Colorado River Basin Project Act passed |
| − | == | + | ==1967== |
| − | * | + | *Humpback chub and Colorado pikeminnow federally listed as endangered |
| − | == | + | ==1966== |
| − | * | + | *National Historic Preservation Act passed |
| − | == | + | ==1965== |
| − | *[ | + | *[[The 1965 Reservoir Equalization and Channel Cleaning Floods]] |
| − | + | *United States contract for delivery of power from the Colorado River Storage Project to customers. | |
| − | * | + | |
| − | + | ||
| − | == | + | ==1964== |
| − | * | + | *U.S. Supreme Court decision in Arizona v. California confirmed apportionments of Colorado River water authorized in 1928 Boulder Canyon Project Act, including Nevada's allocation of 0.3 maf per year. The Decree in this case set many of the rules under which the river is operated. |
| − | + | ||
| − | + | ||
| − | == | + | ==1963== |
| − | * | + | *Glen Canyon Dam completed as part of the Colorado River Storage Project. |
| + | *U.S. Supreme Cort held in Arizona vs California that, as a result of the Boulder Canyon Project Act, California held an allocation of 4.4 maf, Arizona 2.8 maf, and Nevada 300,000 acre-feet of Colorado River water | ||
| − | == | + | == 1956 == |
| − | * | + | *Colorado River Storage Project Act passed authorizing Glen Canyon Dam |
| − | == | + | == 1948 == |
| − | * | + | *Upper Colorado River Basin Compact signed |
| − | + | ||
| − | == | + | == 1944 == |
| − | * | + | *Treaty with Mexico obligating the US to provide 1.5 maf of Colorado River water to Mexico annually |
| − | + | ||
| − | + | ||
| − | == | + | == 1935 == |
| + | *Hoover Dam completed | ||
| − | == | + | == 1928 == |
| − | * | + | *Boulder Canyon Project Act passed authorizing Hoover Dam. |
| − | == | + | == 1922 == |
| + | *Colorado River Compact signed allocating the Colorado River water between the upper and the lower basins. Upper basin States have the right to use 7.5 maf/yr only if that quantity is available after meeting delivery requirements of 7.5 maf/yr to the Lower basin plus the amount required to satisfy anticipated claims by Mexico. | ||
| − | == | + | == 1921 == |
| − | * | + | *[http://www.parkerliveonline.com/2013/07/24/colorado-river-day-thursday/ Colorado River was officially re-named from the “Grand” to the “Colorado.” (July 25th)] |
| − | == | + | == 1919 == |
| − | * | + | *Grand Canyon National Park created |
| − | == | + | == 1916 == |
| − | * | + | *National Park Service Organic Act passed |
| − | == | + | == 1902 == |
| − | * | + | *Reclamation Act Creates the Bureau of Reclamation |
| − | == | + | == 1869 == |
| − | *[ | + | *Major John Wesley Powell leads first recored expedition to traverse Grand Canyon |
| + | *[http://www.azcentral.com/story/travel/local/history/2014/05/27/powells-death-defying-grand-canyon-odyssey/9596303/ Powell's death-defying Grand Canyon odyssey] | ||
| − | == | + | ==*11,000 BP== |
| − | * | + | *Paleo-Indian peoples occupy Grand Canyon region |
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
Revision as of 18:20, 28 September 2026
2027
2026
- Start of 2027-2028 Operating Guidelines
2025
- SEIS Bypass Releases (CoolMix) to control smallmouth bass
2024
- SEIS Bypass Releases (CoolMix) to control smallmouth bass
2023
2022
- A 2022 Fall HFE was not conducted due to the discovery of smallmouth bass in Glen Canyon (1,600,000 mt)
- The 2022 Bugflow Experiment
2021
2020
- The 2020 Bugflow Experiment
- COVID moves all meetings for the year to remote
2019
2018
- The 2018 Fall HFE: 38,100 cfs for 60h
- The 2018 Bugflow Experiment
2017
2016
- Publication of the LTEMP EIS
- LTEMP Science Plan
- TWG Protocol Paper
2015
- A 2015 Fall HFE was canceled due to the discovery of green sunfish in Glen Canyon (1,168,000 mt)
- Start of a Triennial Budget and Workplan
2014
- The 2014 Fall HFE: 37,500 cfs for 96h
2013
- The 2013 Fall HFE: 34,100 cfs for 96h
2012
- Publication of the High Flow Experiment Protocol
- The 2012 Fall HFE: 42,300 cfs for 96h (slow downramp)
- Razorback Sucker found in lower part of Grand Canyon- believed the fish traveled some 50 miles upstream from Lake Mead. Last one recorded had been caught in 1990.
2011
- 2009-2011 Fall Steady Flow Experiment
- The 2011 Equalization flows
- Start of a Biennial Budget and Workplan
- Core Monitoring Plan (draft)
2010
2009
2008
2007
2006
- Long-Term Experimental Plan Environmental Plan (LTEP)
2005
2004
2003
- Experiment begun to remove nonnative trout from the Colorado River in Grand Canyon.
- Fluctuating nonnative fish suppression releases from January through March implemented and continued through 2005.
2002
- U.S. Fish and Wildlife Service announces recovery goals for endangered fishes of the Colorado River Basin.
- Adaptive Management Work Group recommends implementation of the first 2 yr of an experimental design proposed by the GCMRC.
2001
- Humpback Chub population in Grand Canyon was in decline in the 1990s, and reached a low of about 5,000 adult fish in 2001.
- Draft Strategic Plan for the GCDAMP developed by program managers.
2000
- The 2000 Low Steady Summer Flow Experiment (LSSF)
- Second and third tests of the habitat maintenance flows concept conducted in spring and summer.
1999
- AMWG Colorado River trip to develop the Vision Statement for the GCDAMP
1998
1997
- The AMWG held their first meeting on September 10-11, 1997, and officially formed the Glen Canyon Technical Work Group (TWG) as a subgroup to work on tasks charged to them by the AMWG.
- The TWG was formed to provide stakeholders with involvement in federal decisions concerning the operation of Glen Canyon Dam and Power Plant.
- The 1997 Habitat Maintenance Flow (HMF)
- Strategic Planning Subcommittee (1997-2000)
- AMWG and TWG fully established
1996
- The 1996 Beach/Habitat-Building Flow (BHBF)
- Record of Decision on the Operation of Glen Canyon Dam Final Environmental Impact Statement to comply with consultation requirements of the Grand Canyon Protection Act of 1992. (Signed by Secretary of the Interior Bruce Babbitt)
1995
- Establishment of the Grand Canyon Monitoring and Research Center
- Transition Work Group to act as a bridge between GCES and GCDAMP (1995-1996)
1994
- Programmatic Agreement on Cultural Resources signed between the State of Arizona, Department of the Interior agencies, and six tribes over protection of cultural resources in the river corridor below Glen Canyon Dam.
- U.S. Fish and Wildlife Service designates critical habitat for four species of endangered Colorado River fish and completes Biological Opinion outlining reasonable and prudent alternatives that must be evaluated for dam operation.
- Memorandum of Agreement signed for development of a Lower Colorado River Multi-Species Conservation Plan between state agencies in Nevada, California, and Arizona and federal agencies, including the Bureau of Land Management, Bureau of Reclamation, Fish and Wildlife Service, and the National Park Service.MSCP History (SDSU)
1993
1992
1991
- The 1990-91 Experimental Flows
- Interim operating criteria for Glen Canyon Dam implemented.
- Razorback Sucker and Kanab Ambersnail federally listed as endangered.
1990
- The 1990-91 Experimental Flows
- Beginning of Interim Operating Criteria
1989
- Secretary of the Interior Lujan orders an environmental impact statement on dam operations.
- National Research Council sponsors symposium that reviews existing knowledge on Colorado River ecosystem
1988
- Salt Lake City Area Integrated Projects(CRSP)passed-1989 after a series of public information and comment forums.
- Glen Canyon Environmental Studies issues Glen Canyon Environmental Studies Final Report, completing Phase I and starting Phase II (1988-1988), which would be accelerated to support environmental impact statement process.
1987
- National Research Council completes review of Glen Canyon Environmental Studies, publishing River and Dam Management: a Review of the Bureau of Reclamation's Glen Canyon Environmental Studies
1986
1985
1984
- The 1983-86 Floods
- One of the last Razorback Suckers seen in Grand Canyon is caught and released at Bass Rapids
1983
- The 1983-86 Floods
- Glen Canyon Dam releases more than 92,000 cfs to stop Lake Powell from overtopping Glen Canyon Dam.
1982
- Glen Canyon Environmental Studies - Phase I (1982-1988) created to study effects of Glen Canyon Dam operations
1980
- Lake Powell reaches full pool (3,700 ft)
- Bonytail chub listed as endangered
1979
- Grand Canyon National Park designated a UNESCO World Heritage Site
- USBR proposes an upgrade of Glen Canyon Dam's generators
1978
- U.S. Fish and Wildlife Service files jeopardy opinion on the effects of Glen Canyon Dam on endangered fishes
1975
- Grand Canyon National Park Enlargement Act passed
1974
- Colorado River Basin Salinity Control Act authorized the construction, operation, and maintenance of works in the Colorado River Basin to control the salinity of Colorado River water available for use in the United States and Mexico. Some GCDAMP stakeholders participate in the Salinity Control Forums created by the act.
- First Lawsuit filed over Glen Canyon Dam operations by commercial raft operators contending that the disruption of normal flows was interfering with their ability to conduct river trips.
1973
- Endangered Species Act (ESA) of 1973 passed to protect and promote the recovery of animals and plants that are in danger of becoming extinct because of the activities of people. Administered by the US Fish and Wildlife Service.
1972
- Last verified record of Colorado Pikeminnow caught in Grand Canyon at Havasu Creek
1971
1970
- Long-range Operating Criteria developed for Glen Canyon Dam operations
1969
- National Environmental Policy Act (NEPA) of 1969 passed requiring Federal agencies to consider the environmental impacts of their proposed actions and reasonable alternatives to those actions.
1968
- Colorado River Basin Project Act passed
1967
- Humpback chub and Colorado pikeminnow federally listed as endangered
1966
- National Historic Preservation Act passed
1965
- The 1965 Reservoir Equalization and Channel Cleaning Floods
- United States contract for delivery of power from the Colorado River Storage Project to customers.
1964
- U.S. Supreme Court decision in Arizona v. California confirmed apportionments of Colorado River water authorized in 1928 Boulder Canyon Project Act, including Nevada's allocation of 0.3 maf per year. The Decree in this case set many of the rules under which the river is operated.
1963
- Glen Canyon Dam completed as part of the Colorado River Storage Project.
- U.S. Supreme Cort held in Arizona vs California that, as a result of the Boulder Canyon Project Act, California held an allocation of 4.4 maf, Arizona 2.8 maf, and Nevada 300,000 acre-feet of Colorado River water
1956
- Colorado River Storage Project Act passed authorizing Glen Canyon Dam
1948
- Upper Colorado River Basin Compact signed
1944
- Treaty with Mexico obligating the US to provide 1.5 maf of Colorado River water to Mexico annually
1935
- Hoover Dam completed
1928
- Boulder Canyon Project Act passed authorizing Hoover Dam.
1922
- Colorado River Compact signed allocating the Colorado River water between the upper and the lower basins. Upper basin States have the right to use 7.5 maf/yr only if that quantity is available after meeting delivery requirements of 7.5 maf/yr to the Lower basin plus the amount required to satisfy anticipated claims by Mexico.
1921
1919
- Grand Canyon National Park created
1916
- National Park Service Organic Act passed
1902
- Reclamation Act Creates the Bureau of Reclamation
1869
- Major John Wesley Powell leads first recored expedition to traverse Grand Canyon
- Powell's death-defying Grand Canyon odyssey
*11,000 BP
- Paleo-Indian peoples occupy Grand Canyon region
