Investing $1.8 billion into our water supply
Preparing a water system to meet future challenges means investing in a flexible, resilient operation that’s ready for just about anything — such as a warming climate, pandemics, population growth, periodic droughts, competition for water resources, security threats and changing regulatory environments.
From meeting day-to-day challenges to addressing long-range issues, Denver Water is building and maintaining just such a system, one that stretches from the mountains to homes and businesses across the Denver metro area.
The goal: Ensuring a clean, safe, reliable water supply for 1.5 million people, about 25% of Colorado’s population, now and in the future.
To continue meeting that goal, Denver Water expects to invest about $1.8 billion into its water system during the next 10 years, from large projects to regular inspection and maintenance programs designed to ensure the system is flexible, resilient and efficient.
Read how Denver Water customers are investing in their water system.
In addition to rates paid by customers, funding for Denver Water’s infrastructure projects, day-to-day operations and emergency expenses, like water main breaks, comes from bond sales, cash reserves, hydropower sales, grants, federal funding and fees paid when new homes and buildings are connected to the system. The utility does not make a profit or receive tax dollars.
In addition, major credit rating agencies recently confirmed Denver Water’s triple-A credit rating, the highest possible, citing the utility’s track record of strong financial management.
Here’s an overview of some of Denver Water’s recently completed and ongoing work:
Northwater Treatment Plant
Denver Water in 2024 celebrated the completion of the new, state-of-the-art Northwater Treatment Plant next to Ralston Reservoir north of Golden. The new treatment plant was completed on schedule and under budget.
The treatment plant can clean up to 75 million gallons of water per day and the plant’s design left room for the plant to be expanded to clean up to 150 million gallons of water per day in the future as needed.
A major feature of the site visible from Highway 93 is the round, concrete tops of two giant water storage tanks. Most of the two tanks are buried underground; each tank is capable of holding 10 million gallons of clean, safe drinking water.
The plant is a major part of Denver Water’s North System Renewal Project, a multi-year initiative that included building a new, 8.5-mile pipeline between the Northwater Treatment Plant and the Moffat Treatment Plant. The new pipe, completed in 2022, replaced one that dated from the 1930s.
The Moffat Treatment Plant, which also started operations in the 1930s, is still used a few months during the year and will eventually transition to a water storage facility.
Lead Reduction Program
The water Denver Water delivers to customers is lead-free, but lead can get into drinking water as the water passes through old lead service lines that carry water from the water main in the street into the home.
The Lead Reduction Program, which launched in January 2020, is the biggest public health campaign in the utility’s history and considered a leader in the effort to remove lead pipes from the nation’s drinking water infrastructure.
The program reduces the risk of lead getting into drinking water by raising the pH of the water delivered and replacing the estimated 60,000 to 64,000 old, customer-owned lead service lines at no direct cost to the customer. Households enrolled in the program are communicated with regularly and provided with water pitchers and filters certified to remove lead to use for cooking, drinking and preparing infant formula until six months after their lead service line is replaced.
To date, Denver Water has replaced more than 28,000 customer-owned lead service lines at no direct cost to the customers. The program received $76 million in federal funding in 2022 to help accelerate the pace of replacement work in underserved communities, resulting in thousands of additional lines being replaced during 2023 and 2024.
Water storage
Work on the Gross Reservoir Expansion Project, the subject of more than 20 years of planning, got underway in April 2022. Expected to be complete in 2027, the project will raise the height of the existing dam by 131 feet.
The higher dam will nearly triple the amount of water that can be stored in Gross Reservoir, providing Denver Water with more flexibility to manage its water supply in the face of increasingly variable weather and snowpack patterns.
The additional storage capacity also will provide a greater balance between Denver Water’s separate north and south water collection areas. (Read Denver Water’s statement on a recent court ruling here.)
Check out the work done on Gross Dam during summer 2024:
After two years of preparation and foundation work, Gross Dam’s new look began to take shape in 2024 when workers began placing new, roller-compacted concrete at the base of the Boulder County dam in early May.
Raising the dam involves building 118 steps on the downstream side of the dam. Each step is 4 feet tall with a 2-foot setback.
At the height of construction, there will be as many as 400 workers on-site, and when complete the dam will be the tallest in Colorado.
Ongoing investments for the future
As the metro area grows and changes, it’s often an opportunity for Denver Water to upgrade older elements of its system.
Denver Water is continuing its investment in replacing about 80,000 feet of water mains under streets every year while also installing new water delivery pipe where needed. The utility has more than 3,000 miles of pipe in its system, enough to stretch from Seattle to Orlando.
In early 2025, Denver Water will wrap up a major project: replacing 5 miles of 130-year-old water pipe under East Colfax Avenue, from Broadway to Yosemite Street. The pipe replacement work was done in advance of the East Colfax Bus Rapid Transit project. That effort, led by the Denver Department of Transportation and Infrastructure, broke ground in early October.
In addition to replacing the water mains under Colfax, Denver Water crews are replacing any lead service lines they encounter during the project.
Changing our landscapes
In recognition of the drought in the Colorado River Basin, Denver Water and several large water providers across the basin in 2022 committed to substantially expanding existing efforts to conserve water.
Among the goals outlined in the agreement is the replacement of 30% of the nonfunctional, water-intensive Kentucky bluegrass in our communities — like the decorative expanses of turf grass in traffic medians — with more natural ColoradoScapes that include water-wise plants and cooling shade trees that offer more benefits for our climate, wildlife and the environment.
Denver Water supported a new state law passed in 2024 designed to halt the expansion of nonfunctional, water-thirsty grass by prohibiting the planting or installation of high-water-using turf in commercial, institutional, or industrial property or a transportation corridor. The bill takes effect Jan. 1, 2026. The new law doesn’t affect residential properties.
Denver Water also is working with partners — including local governments, fellow water providers and experts in water use and landscapes — to develop programs that will help transform our landscapes and expand our indoor and outdoor conservation efforts.
The utility in 2024 held water-wise gardening workshops and offered a limited number of customer discounts on Resource Central’s popular Garden In A Box water-wise garden kits and turf removal services.
Get tips and information about rebates available for conserving water indoors and out at denverwater.org/Conserve.
The utility also has started work transforming its own landscapes, including about 12,000 square feet around its Einfeldt pump station near the University of Denver. It’s Youth Education program has helped Denver-area students remodel landscapes at their schools.
And it’s supporting partners, such as Denver’s Parks and Recreation Department, which is replacing 10 acres of water-intensive Kentucky bluegrass covering the traffic medians on Quebec Street south of Interstate 70. The project is replacing the homogenous expanse of turf with a closely managed, water-wise Colorado prairie meadow filled with grasses and wildflowers that provide habitat to pollinators.
These projects are examples of how Denver Water is planning for a warmer, drier future by partnering with our community. Together, we can build a system and a landscape that supports our customers and creates a thriving, vibrant community now and in the future.