#ColoradoRiver: “Killing the #Colorado” spotlights new solutions — American Rivers #COriver

killingthecoloradotrailerscreenshot

From American Rivers (Sinjin Eberle):

I have noticed a lot of chatter lately about the situation at Lake Mead. Dramatic overuse, prolonged drought, and the effects of increased temperatures have led to a historically low volume of water stored in the largest reservoir on the Colorado River. One of the most critical components of water in the west is less than 40% full. Yet while some people scramble for a quick fix or point fingers, others see the long game and note the optimism that working together for smart, sustainable solutions can bring. There is hope, there is a roadmap, and together we have the knowledge, skill, and foresight to make it happen.

Lake Mead behind Hoover Dam December 2015 via Greg Hobbs.
Lake Mead behind Hoover Dam December 2015 via Greg Hobbs.

The Discovery Channel recently produced a new documentary, Killing the Colorado, a made-for-TV version of the lengthy ProPublica series of the same name. The show is excellent, comprehensive, and features a number of voices that you may not expect to be featured in a film about the environment. Imperial valley agricultural producers, water managers, a red-state Senator and a blue-state Governor – all identifying problems facing the basin, and most putting forth an optimistic view that a human-caused predicament can be solved with human-inspired ingenuity.

One quote in particular is poignant – there is a scene with Colorado Governor John Hickenlooper in his office flipping through a binder full of historic water compacts. Upon his observance of the generations of water agreements, he remarks “The thing you realize when you go through these [water] compacts, is that everyone is in this together.” Given the situation facing Lake Mead, a growing chorus of voices around Lake Powell, the birth of the Colorado Water Plan, and a recognition that heathy rivers support healthy agriculture and sustainable economies, we truly are all rowing the same boat together in the Colorado Basin.

Lake Powell via Aspen Journalism
Lake Powell via Aspen Journalism

But, how can Lake Mead affect Colorado from a thousand miles downstream? Well, due to the Colorado River Compact of 1922, headwaters states like Colorado must send a certain amount of water to the Southwestern states of Arizona, Nevada, and California – it’s the law of the river, and the law of the land. And since when the Compact was developed, California was a fast growing destination, it has priority and can “call” for water if needed. For years, California has had the luxury to get much of the surplus of water that Colorado and Wyoming have sent downstream to be stored in Lake Powell and Lake Mead. But now with prolonged drought, a fast-growing population across the entire Southwest, and a substantial agricultural economy (especially in the Imperial Valley), the era of surplus water is over. As such, Lake Mead is directly connected to Colorado, whether we like it or not, and that connection is the Colorado River.

Killing the Colorado does a fantastic job over nearly an hour-and-a-half of highlighting a variety of colorful characters who have recognized that shortage and a lack of water will change everything in the future – that future is now. But while both the show and the written article are excellent at highlighting the situation, they don’t delve deeply into what I think is most important – that real solutions do exist, and we know how to implement them, it simply takes our collective will to get them moving. Solutions like urban and agricultural conservation and efficiency, like reuse and recycling, like innovative water banking and flexible management practices, like continuing the shift towards renewable energy (solar and wind don’t devour cooling water like natural gas and coal plants require). But while these efforts all seem daunting and out of an individual’s control, there are actions that each of us can take every day that together, make a huge difference. Like buying and installing your own rain barrel for your outside plants and flowers, like supporting your local farmer at the farmer’s market – small things that have a great impact, especially when we all do them together.

Solutions do exist, and as Arizona Senator Jeff Flake said “The drought over the past couple of years has awakened all of us to the future we have if we don’t do better planning. There are many things that are out of our control…Planning is so important. Conserving. Recharging. Water banking. Water markets. These are all important things that have to take place.

Let’s get started!

The Yampa River flows through the Carpenter Ranch. Photo courtesy of John Fielder from his new book, “Colorado’s Yampa River: Free Flowing & Wild from the Flat Tops to the Green.” -- via The Mountain Town News
The Yampa River flows through the Carpenter Ranch. Photo courtesy of John Fielder from his new book, “Colorado’s Yampa River: Free Flowing & Wild from the Flat Tops to the Green.” — via The Mountain Town News

#ColoradoRiver: The Plan to Strengthen Denver’s Water Supply — 5280.com #COriver

Gross Dam enlargement concept graphic via Denver Water
Gross Dam enlargement concept graphic via Denver Water

From 5280.cm (Amy Thomson):

Considering the Denver region is growing by an average of 4,500 new residents per month, a large sector of the population likely doesn’t remember the catastrophic 2002 drought. The most severe water shortage since the Dust Bowl, snowpack and soil moisture were at all-time lows, and we remained in a dry period until 2006. Luckily, with water restrictions in place, we never actually ran out of water—we just got really close.

“We realized that we had an immediate need to correct a vulnerability in our system,” Denver Water CEO Jim Lochhead says. That’s when Denver Water started planning the Gross Reservoir Expansion Project, and after more than a decade of negotiations, the project (which was recently endorsed by Gov. John Hickenlooper) is underway.

But will it be enough? The short answer is yes—as long as Denverites work on strengthening their water conservation practices. Lochhead was pleased to note that when a storm comes through the Mile High City, there is a noticeable drop in outdoor water use, because well-informed residents are turning off their sprinkler systems. Denver residents have managed to reduce water consumption by more than 20 percent in the last 15 years, even with a 15 percent increase in population, according to Lochhead.

The decrease is not enough to mitigate the risk of drought, however. As Colorado’s largest water utility, the Denver Water system is made up of two collection systems—the Northern and the South Platte—and they are incredibly imbalanced. About 80 percent of the water comes from the south system, leaving the north very vulnerable to low rainfall or wildfires. During the notable dry years of 2002 and 2013, clients in the north end were lucky their taps continued to flow.

“We were literally only one drought away from a major problem in our system,” Lochhead says, noting that as recently as 2013, the system was virtually out of water in the north-end.

#ColoradoRiver: “..in the Colorado Constitution, the Continental Divide doesn’t exist” — Jim Pokrandt

Denver Water's collection system via the USACE EIS
Denver Water’s collection system via the USACE EIS

From The Grand Junction Daily Sentinel (Dennis Webb):

A proposal to divert Colorado River water to Denver recently has won the endorsement of Gov. John Hickenlooper and the approval of the Colorado Department of Public Health and Environment.

But Denver Water’s Gross Reservoir expansion project may be just as notable for its general lack of opposition west of the Continental Divide. That’s thanks to a wide-ranging agreement, effective in 2013, in which Denver Water obtained concessions including a promise that numerous Western Slope parties to the agreement wouldn’t oppose the expansion project. In return, Denver Water made a number of commitments to the Western Slope.

Now Western Slope interests are working on a similar agreement with Northern Water and others on what’s called the Windy Gap Firming Project, which would store Colorado River water in a proposed Boulder County reservoir.

These approaches represent a far cry from how the Western Slope used to respond to transmountain diversion proposals.

“This is the new paradigm. It’s not the old school. In the old school it was like … we’ll see you in court,” said Jim Pokrandt of the Colorado River District, a party to the 2013 Denver Water deal.

For Denver Water, what’s called the Colorado River Cooperative Agreement provided greater certainty for its customers through means such as resolving longtime disputes regarding West Slope water. For the Western Slope, the deal meant dozens of obligations by Denver Water, such as millions of dollars in monetary payments to various entities, protections of Colorado River flows and water quality, a commitment to further water conservation and reuse efforts by Denver Water customers, and a provision aimed at helping assure maintenance of historic flows in the Colorado River even when the Shoshone Power Plant in Glenwood Canyon is not operating. That hydroelectric plant has a senior right helping control flows in the river.

Another key point in that deal is a promise that Denver Water and its customers won’t try to further develop Colorado River water without agreement from the river district and affected counties.

The cooperative agreement has 18 signatories but more than 40 partners, primarily West Slope governments, water conservation and irrigation districts, and utilities. Among them are the Ute Water Conservancy District and multiple irrigation districts in Mesa County.

Pokrandt said the 2013 deal is a win-win for both sides of the Continental Divide.

“That said, yes, more water would be moving east” if the Gross Reservoir project proceeds, he said.

The project, also sometimes called the Moffat Collection System Project, would nearly triple the capacity of the Boulder County reservoir. Denver Water is targeting water in the Fraser River, a tributary of the Colorado.

“Right now there are some periods of time when Gross Reservoir is full at its current size and their water rights are in priority but they can’t take any more water,” Pokrandt said.

The project has an estimated cost of $380 million, and Denver Water hopes to obtain the remaining major permits by the end of next year. CDPHE in June certified that the project complied with state water quality standards, and Hickenlooper endorsed it last week.

“The state’s responsibility is to ensure we do the right thing for Colorado’s future, and this project is vital infrastructure for our economy and the environment,” Hickenlooper said in a news release. “The partnerships and collaboration between Denver Water, the West Slope and conservation organizations associated with this project are just what the Colorado Water Plan is all about.”

That recently adopted plan in some respects took its lead from the Denver Water/Western Slope deal in seeking to address the state’s future water needs in a cooperative rather than confrontational manner statewide.

Pokrandt conceded that not everyone loves the Gross Reservoir proposal…

Trout Unlimited takes a more positive view of the Gross Reservoir project, pointing to its inclusion of a “Learning by Doing” program requiring monitoring of the health of the Fraser River and adjusting operations as needed. The Gross Reservoir proposal envisions drawing water from the Western Slope in wetter years and seasons, but providing the Colorado River watershed with extra water during low flow periods and investing in restoration projects.

“Moreover, Denver Water has entered into partnerships on the Front Range to ensure that the project alleviates chronic low-flow problems in South Boulder Creek. Both sides of the Divide benefit,” David Nickum, executive director of Colorado Trout Unlimited, said in a news release…

Denver Water Chief Executive Officer Jim Lochhead said in a news release, “The Denver metropolitan area is tied to the economic and environmental health of the rest of the state, and Denver Water is committed to undertake this project in a way that enhances Colorado’s values.”

Pokrandt said Western Slope water interests face the reality that under the state Constitution the right to appropriate water shall not be denied if the water can be put to beneficial use and a party can obtain the necessary financing and permitting.

“There’s not a legal stance to say no, so that’s why the river district was even formed in 1937, was to negotiate these things, because no is not an answer in the legal arena because of the Colorado Constitution,” he said.

When it comes to water rights, Pokrandt said, “in the Colorado Constitution, the Continental Divide doesn’t exist.”

#ColoradoRiver #COWaterPlan: “Having this additional storage enables that flexibility” — Jim Lochhead #COriver

Denver Water's collection system via the USACE EIS
Denver Water’s collection system via the USACE EIS

From The Denver Post (Bruce Finley):

This formal backing completes the state’s environmental reviews for the Moffat project, 13 years in the making, clearing the way for construction — if remaining federal permits are issued. Denver Water and opponents from Western Slope towns and nature groups reached a compromise aimed at enabling more population growth while off-setting environmental harm.

It is a key infrastructure project that will add reliability to public water supplies and protect the environment, Gov. John Hickenlooper wrote in a letter to Denver Water manager Jim Lochhead.

It “aligns with the key elements of Colorado’s Water Plan,” Hickenlooper wrote. “Denver Water and its partners further our shared vision for a secure and sustainable water future while assuring a net environmental benefit in a new era of cooperation.”

Denver would siphon 10,000 acre-feet a year, on average, more water out of Colorado River headwaters, conveying it eastward under the Continental Divide through a tunnel for more than 20 miles to an expanded Gross Reservoir southwest of Boulder. By raising that reservoir’s existing 340-foot dam to 471 feet, the project would increase today’s 41,811 acre-feet storage capacity by 77,000 acre-feet — more than doubling the surface area of the reservoir…

For more than a decade, Denver Water has been seeking permits, including federal approval for construction affecting wetlands and to generate hydro-electricity at the dam.

“During dry years, we won’t be diverting water. It is a relatively small amount of water. … It is a water supply that Colorado is entitled to develop,” Lochhead said in an interview.

The increased storage capacity “allows us to take water in wet times and carry it over through drought periods. It gives us operational flexibility on the Western Slope. … Having this additional storage enables that flexibility.”

Colorado leaders’ formal endorsement follows a recent Colorado Department of Public Health and Environment decision to issue a water quality permit for the project, certifying no water quality standards will be violated. Hickenlooper has directed state officials to work with federal water and energy regulators to expedite issuance of other permits. Denver Water officials said they expect to have all permits by the end of 2017, start construction 2019 and finish by 2024…

…Trout Unlimited and other conservation groups call the project a realistic compromise considering the rapid population growth along Colorado’s Front Range.

“If the state needs to develop more water, they need to do it in a less-damaging, more responsible way — as opposed to going to the pristine headwaters of the South Platte River, which is what the Two Forks project was going to do,” TU attorney Mely Whiting said.

“We’ve put things in place that will make Denver Water be a steward of the river,” Whiting said. The agreement hashed out between Denver Water and conservationists “does not specifically say they have to tweak the flows to help the environment. It does say they have to monitor, for water temperature and macroinvertebrates. And if there’s a problem, they are responsible for figuring out why and they need to do something about it. It does not say exactly what they have to do but they have to fix any problem.”

Gross Dam enlargement concept graphic via Denver Water
Gross Dam enlargement concept graphic via Denver Water

From The Colorado Independent (Marianne Goodland):

Gov. John Hickenlooper has officially endorsed a project to expand Boulder County’s Gross Reservoir, a move he hopes will improve Colorado’s water capacity for the next several decades.

The endorsement was considered a formality; Hickenlooper wrote to President Barack Obama four years ago, asking for the president’s help in speeding up the process for Gross and other water projects.

Colorado is predicted to face a gap of more than one million acre-feet of water by 2050, according to a 2010 estimate that many believe may be on the low end. One acre-foot of water is the amount of water it would take to cover the field at Mile High Stadium from endzone to endzone with one foot of water. That’s 325,851 gallons of water. The average family of four uses about half an acre–foot of water per year.

Hickenlooper couldn’t give his formal okay for the expansion of the reservoir, which is northwest of Eldorado Springs, until the state’s Department of Public Health and Environment had completed its review that certifies the project would comply with state water quality standards.

At 41,811 acre feet, Gross is among the state’s smallest reservoirs. It’s operated by Denver Water, supplied by water coming from the Fraser River on the west side of the Continental Divide through the Moffat Tunnel.

The expansion would allow the reservoir to collect another 18,000 acre-feet of water, enough to supply 72,000 more households per year. The estimated cost is about $380 million, which includes design, management, permitting, mitigation and construction.

The Gross expansion has been in the works for more than 13 years, with its first permits applied for in 2003. If all goes according to plan, the permitting process will be completed in 2017,with construction to begin in 2019 or 2020. The reservoir could be fully filled by 2025, according to Denver Water spokesman Travis Thompson.

In his letter to Denver Water, Hickenlooper called the Gross project key to serving more than 25 percent of the state’s population. It will “add reliability to our public water supply, and provide environmental benefits to both the East and West Slopes of Colorado,” he said.

Aye, there’s the rub: the Western Slope, whose residents fear that anything that will divert more water from the Western Slope to the Eastern Slope will cut into their water supplies. They also worry that more diversions of Colorado River water will make it more difficult to satisfy multi-state compacts with southwestern states that rely on water from the Colorado River, of which the Fraser is a tributary.

But Jim Lochhead, head of Denver Water, told The Colorado Independent that any further diversions will require buy-in from folks on the Western Slope.

It’s part of an arrangement between Denver Water and 17 Western Slope water providers that has been in development for the past six years, Lochhead said. “We’ve worked extensively with the West Slope to develop the Colorado River cooperative agreement,” which will make the environment and economy of Western Colorado better off, he said.

The agreement addresses impacts of Denver Water projects in Grand, Summit and other counties, all the way to the Colorado-Utah border.

Lochhead hopes the Gross Reservoir project will be a model for cooperation, with benefits for both sides of the Continental Divide.

And the cost? The budget for the agreement starts at $25 million and goes up from there. That first funding goes to Summit and Grand counties for enhancement projects, which includes improved water supply for Winter Park, Keystone and Breckenridge ski areas. Lochhead said the locals will figure out exactly how to spend the money, and that Denver Water isn’t dictating what those counties will do with it beyond setting some parameters for protection of watersheds, the area of land that drains to a particular body of water.

Denver Water has also committed to making improvements to the Shoshone Power Plant on the Colorado River near Glenwood Springs, and improvements to wastewater treatment plants all the way to the western state line to enhance area water quality.

“We have an extensive list of commitments to partner with the Western Slope, to do the right thing,” Lochhead said.

The Gross Reservoir expansion is critical to Denver Water’s future needs, as Lochhead sees it, because its improved capacity will allow the water utility to operate its system with more flexibility. That’s most important for Denver Water’s attention to environmental concerns, both on the Western Slope and for South Boulder Creek, which flows out of Gross Reservoir.

“The state’s responsibility is to ensure we do the right thing for Colorado’s future, and this project is vital infrastructure for our economy and the environment,” Hickenlooper said in a statement today. “The partnerships and collaboration between Denver Water, the West Slope and conservation organizations associated with this project are just what the Colorado Water Plan is all about.”

Added Lochhead in a statement Wednesday: “The Denver metropolitan area is tied to the economic and environmental health of the rest of the state, and Denver Water is committed to undertake this project in a way that enhances Colorado’s values.”

The dam that forms Gross Reservoir, located in the mountains west of Boulder. Photo: Brent Gardner-Smith/Aspen Journalism
The dam that forms Gross Reservoir, located in the mountains west of Boulder. Photo: Brent Gardner-Smith/Aspen Journalism

#ColoradoRiver: Gov. Hickenlooper endorses Gross Reservoir Expansion Project — @DenverWater #COriver

The dam that forms Gross Reservoir, located in the mountains west of Boulder. Photo: Brent Gardner-Smith/Aspen Journalism
The dam that forms Gross Reservoir, located in the mountains west of Boulder. Photo: Brent Gardner-Smith/Aspen Journalism

Here’s the release from Denver Water (Stacy Chesney/Travis Thompson):

Colorado Gov. John Hickenlooper has officially endorsed Denver Water’s proposed Gross Reservoir Expansion Project as a model for achieving a balanced approach to environmental protection and water supply development through an inclusive and collaborative public process.

The endorsement follows the Colorado Department of Public Health and Environment’s issuance of a Section 401 Water Quality Certification on June 23, 2016, which ensures compliance with state water quality standards. The certification confirms that Denver Water’s commitment to extensive mitigation and enhancement measures for the project will result in a net environmental benefit.

“The state’s responsibility is to ensure we do the right thing for Colorado’s future, and this project is vital infrastructure for our economy and the environment,” said Colorado Gov. John Hickenlooper. “The partnerships and collaboration between Denver Water, the West Slope and conservation organizations associated with this project are just what the Colorado Water Plan is all about.”

The Gross Reservoir Expansion Project — also known as the Moffat Collection System Project — will strengthen Denver Water’s system against drought and climate change by nearly tripling the capacity of Gross Reservoir, located in Boulder County.

“Colorado is a growing and dynamic state,” said Denver Water CEO Jim Lochhead. “Denver Water has the critical responsibility to sustain over 25 percent of the state’s population and the majority of our economy for decades to come.”

Since 2003, Denver Water has been involved in federal, state and local permitting processes to evaluate the proposed project and develop ways to not only mitigate identified impacts, but also to enhance the aquatic environment and the economy of Colorado. The 401 certification — one of the major regulatory requirements — recognizes and builds upon other existing Denver Water agreements such as the landmark Colorado River Cooperative Agreement, Learning by Doing cooperative effort and the Grand County Mitigation and Enhancement Coordination Plan.

“The Denver metropolitan area is tied to the economic and environmental health of the rest of the state, and Denver Water is committed to undertake this project in a way that enhances Colorado’s values,” said Lochhead.

Denver Water expects to secure all of the major permits for the project by the end of 2017. The estimated cost of the project is about $380 million, which includes design, management, permitting, mitigation and construction.

Visit http://grossreservoir.org to read more about the project and http://denverwaterblog.org for videos with voices from a few of the many project supporters including, Gov. Hickenlooper, Western Resource Advocates, Trout Unlimited, Colorado Water Conservation Board and Colorado Parks and Wildlife.

Here’s a post from Brent Gardner-Smith (Aspen Journalism) dealing with the subject but with a West Slope angle.

#COWaterPlan: Time to get started on implementation

James Eklund and Governor Hickenlooper roll out the Colorado Water Plan, Thursday, November 19, 2015 via The Colorado Independent
James Eklund and Governor Hickenlooper roll out the Colorado Water Plan, Thursday, November 19, 2015 via The Colorado Independent

From The Denver Post (Jim Lochhead, Jon Goldin-Dubois):

The big question now is, what steps do we need to take to secure Colorado’s water future? The answer lies in Chapter 10: the “Critical Action Plan” that includes important, measurable objectives, goals and actions.

This chapter calls for reducing the future gap between water supply and demand by continuing water conservation and reuse efforts, incorporating water-saving actions into land-use planning, working to preserve agricultural economies while increasing flexibility and efficiency, creating stream and watershed protection plans, and increasing education and outreach.

These ideas are well thought out, reasoned and critical to implement. And the legislature took a few baby steps on some of these earlier this year. It legalized capturing rainwater through residential rain barrels, and it increased the ability of Front Range agricultural water users to retain their water rights but share some of their water with other users in times of need. The legislature also allocated $5 million to the CWCB to begin implementing the water plan.

However, now is not the time to claim success or, conversely, to throw in the towel. Now is the time to use the collective attention, work and energy of the tens of thousands of citizens who helped shape the plan and those who work daily on water issues in the state to push through critical parts of the plan to ensure a secure water future for Colorado.

Fortunately, we don’t have to reinvent the wheel to get this done. We have proven examples on how to kick-start, incubate, and work cooperatively to implement the water plan’s suggested actions.

For instance, the Colorado River Cooperative Agreement between Denver Water and West Slope local governments, water providers and ski areas will enhance the health of streams in the Colorado River Basin while allowing Denver Water to strengthen its system against drought and climate change by enlarging Gross Reservoir. As a result, the project actually benefits both sides of the Great Divide. Future projects like the expansion of Gross Reservoir that include appropriate mitigation are part of the solution. They should receive state support and funding because they can align with the state’s water values and the plan’s well-articulated criteria for being sustainable, collaborative and cost-effective. Indeed, the plan’s criteria should be applied to all project proposals — including the $5 million noted above — to ensure public funds are spent wisely.

Most importantly, we can take simple, immediate actions to increase water-use efficiency. The governor can accelerate reuse, graywater, and green infrastructure by funding the Colorado Department of Public Health and Environment to update its regulations. He can work to remove barriers to water reuse and green stormwater management and use. He can improve river health by setting a time frame for the CWCB and basin roundtables to establish priority lists of rivers that should have local stream management plans done. And, he can support water banks — to better facilitate sharing water for a multitude of purposes — in key river basins…

Jon Goldin-Dubois is president of Western Resource Advocates. Jim Lochhead was appointed Denver Water’s CEO and manager in 2010.

Lost Man Creek finds its way back to Roaring Fork River

Flows in the main stem of the Roaring Fork River on Tuesday, June 14, 2016 below the diversion dam on the upper Roaring Fork. The flows shown heading toward Aspen, about 250 cfs, include  flow from  Lost Man Creek and  the main stem of the Fork.
Flows in the main stem of the Roaring Fork River on Tuesday, June 14, 2016 below the diversion dam on the upper Roaring Fork. The flows shown heading toward Aspen, about 250 cfs, include flow from Lost Man Creek and the main stem of the Fork.

by Brent Gardner-Smith, Aspen Journalism

ASPEN – On Tuesday, June 14 the Twin Lakes Reservoir and Canal Co. turned out the flow of Lost Man Creek into the main stem of the Roaring Fork River, instead of sending it under the Continental Divide to Twin Lakes Reservoir.

Lost Man Creek is a major tributary of the upper Roaring Fork River and nearly its entire flow is typically diverted through the Twin Lakes Tunnel.

The creek flows out of sweeping high country valley and runs into Lost Man Reservoir. It’s then diverted into a canal and dumps into the main stem of the Roaring Fork River behind a dam.

That dam doesn’t form a reservoir, but instead diverts water from both Lost Man Creek and the Fork into a tunnel under Green Mountain and then, after another stretch of canal, into Grizzly Reservoir.

Once water from Lost Man Creek and the main stem of the Roaring Fork reaches Grizzly Reservoir it joins water from Lincoln, New York, Brooklyn and Tabor creeks and normally flows into the Twin Lakes Tunnel. The water in the tunnel daylights into Lake Creek and flows down to Twin Lakes Reservoir in Twin Lakes, Colorado.

From Twin Lakes Reservoir, all of the water collected and diverted by what’s officially known as the Independence Pass Transmountain Diversion System is sent to Aurora, Colorado Springs, Pueblo West, Pueblo and fields in the lower Arkansas River basin.

But due to constraints in its water rights, Twin Lakes Reservoir and Canal Co. is being forced to curtail its diversions from the Indy Pass system, which means in all, 600 cfs of native flows will be turned out Wednesday and will flow either into the main stem of the Fork or upper Lincoln Creek, which flows into the Fork just above the Grottos.

On Tuesday, just flows from Lost Man Creek and the Fork were turned out from the diversion system, adding about 250 cfs to the Fork as it flowed past Lost Man Campground.

On Wednesday, the flows from the Lincoln Creek side of the system will be added to the released native flow of water heading downstream toward Aspen.

The Twin Lakes Tunnel, which has been diverting over 600 cfs since June 6, is set to be closed at noon Wednesday, according to Kevin Lusk, the president of the board of Twin Lakes Reservoir and Canal Co. and a senior engineer with Colorado Springs Utilities, which owns 55 percent of the water diverted from the upper Fork.

The Twin Lakes Tunnel is expected to be closed for two to three week and the return of native flows to the Fork – for the second year in a row – may flood the North Star Nature Preserve and create what some locals called “Lake North Star.”

Last year, when the Twin Lakes Tunnel closed, the Fork peaked at the “Roaring Fork Near Aspen” gauge at 1,680s cfs on June 18.

Tuesday evening, flows in the Fork at “Roaring Fork Near Aspen” gauge, at Stillwater Drive, were at 640 cfs, up from 400 cfs before the flow of Lost Man Creek was returned to the Fork.

With the addition of Wednesday of about 350 cfs coming down Lincoln Creek, the flows at Stillwater Dr. could reach the 1,000 cfs range. The Fork, at its confluence with the Colorado River in Glenwood Springs, was flowing at 4,150 cfs on Tuesday night.

Hot and sunny weather expected over the next week in the Aspen area will also likely drive up the flow in the river.

Lost Man Creek, on June 14, 2016, flowing out of the high country near Independence Pass in the upper Roaring Fork River basin. Just below this point the creek reaches Lost Man Reservoir.
Lost Man Creek, on June 14, 2016, flowing out of the high country near Independence Pass in the upper Roaring Fork River basin. Just below this point the creek reaches Lost Man Reservoir.
Looking upstream from the dam across Lost Man Creek that forms Lost Man Reservoir, on Tuesday, June 14, 2016.
Looking upstream from the dam across Lost Man Creek that forms Lost Man Reservoir, on Tuesday, June 14, 2016.
The canal that moves water from Lost Man Reservoir, under SH 82, and into the main stem of the Roaring Fork River, just above a river-wide diversion dam across the Fork.
The canal that moves water from Lost Man Reservoir, under SH 82, and into the main stem of the Roaring Fork River, just above a river-wide diversion dam across the Fork.
A view from the dam across the main stem of the Roaring Fork River - just above Lost Man Campground - and the entrance to the tunnel under Green Mountain. That tunnel normally leads the water to Grizzly Reservoir and to the Twin Lakes Tunnel.
A view from the dam across the main stem of the Roaring Fork River - just above Lost Man Campground - and the entrance to the tunnel under Green Mountain. That tunnel normally leads the water to Grizzly Reservoir and to the Twin Lakes Tunnel.
Flows in the main stem of the Roaring Fork River on Tuesday, June 14, 2016 below the diversion dam on the upper Roaring Fork. The flows, shown heading toward Aspen, include about 250 cfs from  Lost Man Creek and  the portion of the main stem of the Fork that was previously being diverted.
Flows in the main stem of the Roaring Fork River on Tuesday, June 14, 2016 below the diversion dam on the upper Roaring Fork. The flows, shown heading toward Aspen, include about 250 cfs from Lost Man Creek and the portion of the main stem of the Fork that was previously being diverted.
The flows in the half-mile-long section of Lost Man Creek between Lost Man Reservoir and the Roaring Fork River. The tail end of Lost Man Creek has been reduced to a trickle for decades. Above Lost Man Reservoir, the creek is too deep to wade across safely. Below the reservoir, it's easy to step over.
The flows in the half-mile-long section of Lost Man Creek between Lost Man Reservoir and the Roaring Fork River. The tail end of Lost Man Creek has been reduced to a trickle for decades. Above Lost Man Reservoir, the creek is too deep to wade across safely. Below the reservoir, it's easy to step over.