
On Tuesday, November 24th, I had the opportunity to head to the Bureau of Reclamation (from now on denoted as BoR), located west of Loveland, with Noah (a fellow Colorado Climate Center inhabitant) and Colleen (who works for the Poudre School District). Noah and Colleen collaborate on a project (
Walking Through the Water Year) to teach students about Colorado's climate. At the BoR, we met with Kara Lamb, who was to give us the full tour of the Colorado Big-Thompson project on the east side of the Continental Divide. I'm going to describe the tour, and you can either follow along with the schematic above, or with the slideshow shown below.
First a little Colorado Big-Thompson Project history: Back in the 1930s, it soon became clear that if Colorado's Front Range population grew any more, there would be no water available as aquifers would eventually be completely used and the climate was too arid. Roosevelt signed the bill in 1937 and the BoR, a federal program that had been established in the early 1900s specifically for the purpose of providing westerners with water, was given the task of transferring water from the mountains (where it was more than plentiful) to the Front Range. Many years later, and after the construction of multiple dams, reservoirs, powerplants, tunnels, and canals, the mountains can provide us with water after each snowy season. After all the water is collected in the mountains, it travels 13 miles through a tunnel (the Alva B. Adams Tunnel) to the Mary's Lake and Lake Estes, located in Estes Park on the east side of the mountains.
Our first stop on our tour took us to the Pole Hill Powerplant. Water fed to this powerplant comes directly from Lake Estes via the Olympus Tunnel. Two things can happen at this point: 1) the water will fall 800 feet through the tunnel and generate power through the powerplant before being moved on, or 2) during times when it is not generating power, the water falls out of the tunnel and is fed through a creek and then a canal before being moved on.
The water's next stop, and ours as well, is to the Pinewood Reservoir and through the Rattlesnake Dam. From the reservoir, we moved up the mountain side to see where the water bifurcates (splits into two). In the pictures, you will see two tunnels which snake down the mountain side and head for the Flatiron Powerplant (which is located right next to the BoR offices). The powerplant can generate power from the twin tunnels and/or send the water to the Flatiron Reservoir and to Carter Lake. Water that is sent south to Carter Lake continues south where it ends at Boulder Reservoir. This Reservoir provides water to residents of Boulder, Broomfield, Lafayette, and Longmont. However, we followed the water in its journey north.
After leaving the Flatiron Reservoir, the water is sent through the Charles Hansen Feeder Canal. Along this canal, at the intersection of the canal and the Big-Thompson River, one of three things can happen: 1) The water is fed to the Big-Thompson Powerplant, 2)the water is fed to the Big-Thompson River, or 3)the water continues through the canal where it crosses Highway 34 and the Big Thompson Canyon. According to Kara, this tunnel used to be called the "big green tunnel" until it was painted a color that would nicely match the surrounding rocks.
After this long trek, the water finally reaches the Horsetooth Reservoir, just west of Fort Collins. Much of this water is used by the communities in northern Colorado. Some of this water continues on its long journey to the plains via the Poudre River. And that is the amazing journey of a snowflake, which fell high on a mountain top, melted in the spring, and traveled many miles to end up in your glass of drinking water.