Will my Grand Canyon trip run even with the low water level in Lake Powell? The quick answer is yes. Make no mistake, we are all hoping for an end to the drought, but Grand Canyon river trips are still running strong.
Grand Canyon river levels are more predictable because the vast majority of the water is released from Lake Powell through the Glen Canyon Dam. Our guides get updates regarding the amount of water that will be released and plan their routes through rapids accordingly. Although Lake Powell’s level is very low, the amount of water projected to be released from Glen Canyon Dam is comparable to the past few years. How can the releases be close to normal? The explanation is interesting and complex and is beneficial for Grand Canyon river rafters.
History of Colorado River Allocation
In order to appreciate the scope of the issue – and also rafting trips overall – it’s helpful to get an idea of the history of water policy on the Colorado River. It begins with the “Law of the River”, a collection of compacts, federal laws, court decisions, and regulatory guidelines regarding the use of Colorado River water. The most consequential of these is the 1922 Colorado River Compact. This agreement among the seven basin states (CA, AZ, NV, CO, WY, UT, NM) governs the allocation of water to each state for all uses, including drinking water and agriculture. It is this 100-year-old, 4-page document that dictates how much water flows through the Grand Canyon into Lake Mead. There are some nuances to the amount that must be provided to the lower basin states (CA, AZ, NV) each year, but at a minimum, and in the most dire shortage scenario, 7 million acre-feet of water must flow downstream below Glen Canyon Dam each year. That equates to 10,000 cubic feet/second (cfs) per day over the course of the year. For perspective, the current median annual release is 8.2 million acre-feet or 12,000 cfs per day, which is considered near-normal in the post-dam era.
The amount of water released from the dam varies depending on the season and also fluctuates on a daily basis throughout the year. This is because Glen Canyon Dam is a hydroelectric dam and power generation needs are a major driver of how much water is released. Daily timing changes depending on the season, but the releases from the dam run like clockwork; so much so that a tide table has been developed for use by river rafters. Typically, flows as low as 6,000 cfs and as high as 13,000 cfs repeatedly occur in any given 24-hour period. The point is, the river is runnable at many levels, low to high.
Current Negotiations
The seven basin states and numerous stakeholders are working to renegotiate the Colorado River Compact. The time period that was used as a basis for the average river flow (1905-1922) when the Compact was drawn up is now widely accepted to have been one of abnormally high precipitation. The current drought is likely a return to a natural cycle of much drier conditions. This, exacerbated by the effects of global climate change, leaves regulators with little choice but to rethink the Compact and its dictated water allocations.
One strategy being used to keep Lake Powell’s water level up is the use of stored water from other upstream reservoirs in the Colorado River basin. In essence, you can think in terms of total water stored in the system, rather than just a single reservoir. For example, in 2023, the Bureau of Reclamation released more water than usual from Flaming Gorge Reservoir, 455 river miles upstream from Lake Powell, to boost Lake Powell’s water level. There are numerous other reservoirs in the system to draw from as well. This more holistic, basin-wide approach to water management is one tool that can be used to share this critical resource.
To sum up, your river trip will be an adventure of a lifetime! Regardless of the status of Lake Powell and Glen Canyon Dam, the Colorado River will flow in some form or fashion. It’s been firmly entrenching itself for the last 5 million years and will continue to do so whether the water flows through the penstocks at the dam or eventually runs unimpeded. Even if less water is released from the Glen Canyon Dam, you can still expect to have a great time rafting the Grand Canyon. Some rapids will be more challenging as additional rocks become exposed, and some rapids will have new waves as rocks that were previously deep underwater get closer to the surface. There may be some uncharted waters ahead, but we’ll be there to raft them!
Become Informed and be an Advocate
You obviously care about the place, the river, and the experience. We encourage you to learn a little more about the issues and policies that affect the Colorado River and become an advocate in any way that you can. These issues are of national importance and we hope that you’ll take part in ensuring that people can continue marking a Grand Canyon rafting trip off their bucket lists for generations to come.
Want to get involved? The Grand Canyon Trust is a great place to get started! They are a local non-profit focused on ecological conservation and restoration, as well as cultural preservation in the greater Grand Canyon region. Check with them for current information on policy updates, donate to the cause, or even join one of their volunteer fieldwork trips!
Additional Links
Bureau of Reclamation – Glen Canyon Dam Operations – This is the federal agency that operates and manages water releases at Glen Canyon Dam. This site has everything you’ll want to know about current releases, future projections, and the history of the dam.
USGS Colorado River Gauge at Lees Ferry – The US Geological Survey is responsible for monitoring streamflow for rivers and creeks across the country. This is a real-time look at the current river level at the put-in for all river trips.
Lake Powell Snow Survey – The snowpack in the Rocky Mountains of Colorado is the ultimate driver of lake levels and river flows in the Colorado River basin. Check the snow survey site over the winter to see the current snowpack above Lake Powell.