Gross Reservoir Expansion (Gross Dam Raise) We worked with Denver Water to expand the reservoir at Gross Dam by raising the existing 340-foot-high concrete structure. “The original engineers designed the dam so that it could be raised twice, if needed,” said Jeff Martin, Gross Reservoir project manager. Hiking and fishing access remains open, please ensure you are following local COVID-19 guidelines. Denver Water is planning a major expansion of the reservoir that will increase height of the Gross Reservoir Dam by 131 feet and water storage by 77,000 acre-feet. Denver Water does not monitor ice conditions, therefore it is important to be aware of changing ice conditions. Domestic animals shall be kept on leash or lead and under human physical control at all times. Gross Reservoir is a 5.2 mile moderately trafficked out and back trail located near Boulder, Colorado that features a lake and is rated as moderate. All fires are subject to county bans. Pedestrian use only on all Gross reservoir trails. Parking is permitted only in designated parking lots or defined spaces. Pets are not permitted to enter the water. Help us improve your recreation experience! Raising the capacity of Gross was a recommendation of environmentalists as an alternative to building a new dam, a proposal that would have created Two Forks Reservoir in … “The Gross Reservoir Expansion Project builds on our deep experience in supporting utilities as they execute significant, long-term projects." Gross Reservoir, CO. Photo: Jeffrey Beall. The intersection has the Coal Creek Canyon Improvement Association Hall and United Power offices. We invite you to search for an available time and book an online meeting here. Completed in 1954, the reservoir has a surface area of 440 acres, and the spillway sits at 7,225 feet elevation. See: Denver Water drops appeal to circumvent Boulder County’s review of proposed Gross Reservoir expansion project (July 29, 2020) Boulder County responds to issuance of FERC approval for dam project. Fishing: Cold water, stocked by Colorado Parks and Wildlife. Find out what projects we're doing to improve our system. Construct a fish ladder on Cabin Creek in Grand County. Oppose Gross Dam Expansion to Save Boulder County and Protect our Natural Lands! The reservoir was built to store water from the West Slope traveling through the Moffat Tunnel and from South Boulder Creek. Reservoir Facts. Trespassing is prohibited on dam structure or within any fenced area, facility or areas posted with closure or danger signs. Named for Denver Water former Chief Engineer Dwight D. Gross, the reservoir was completed in 1954. Raitt emphasized that the outlet works project is necessary — regardless of the planned expansion of Gross Reservoir — and will ensure continued safe operations at the facility. Close. When complete, the reservoir will be capable of holding about 119,000 acre-feet of water to provide greater system balance and resiliency. Gross Reservoir Dam Project now subject to local 1041 review. Public use permitted only from sunrise to sunset. Gross Reservoir, located in Boulder County, Colorado, is owned and operated by Denver Water. Colorado signed a compact with all the other Colorado River basin states in 1922. Design Value. Construction Value. Aging outlet works at base of Denver Water dam call for major upgrade to valves, pipes. While this is not a Boulder County project, the reservoir resides entirely in unincorporated Boulder County. This fly ash will be stored in the shores of the reservoir in a high wind corridor. Named for Denver Water former Chief Engineer Dwight D. Gross, the reservoir was completed in 1954. For more information call. Standing 340 feet above the South Boulder Creek streambed, Gross Dam contains some 627,559 cubic yards of concrete. What is the Gross Reservoir Expansion Project? This definitely is worth the stop to take in the views. The reservoir will be open to monitoring and enforcement by CPW. Convey approximately 540 acres of land near the Moffat Tunnel to the U.S. Forest Service for permanent protection and management as part of the National Forest System. Foot high dam - raised 131 ft with RCC. Fish and Wildlife Service’s Upper Colorado River Recovery Program and the Platte River Recovery Implementation Program, both designed to protect endangered species. Using watercraft during posted emergency closures is prohibited. Ice covered the surface of Gross Reservoir in southwestern Boulder County in January 2019. Hike the Gill Trail to catch scenic views of Cheesman Reservoir. Provide $2 million towards aquatic habitat improvements on the Upper Colorado River. We decided to adventure out and looked west of Boulder; we took Baseline Rd west and then turned right to ascend up Flagstaff Road. Please give us feedback. Turn left (west) on Highway 72 toward Pinecliffe to County Road 77/Gross Dam Road. We are committed to being a good neighbor during construction projects. The project will raise the height of the existing 340-foot-dam by 131 feet, increasing reservoir capacity from 42,000 acre feet … October 16, 2020 - TAP - "At Gross Reservoir, one of the most important reservoirs in Denver Water’s system, it’s time to replace the outlet works, a seven-month job so big it will require sawing up massive slabs of concrete and removing fat steel pipes so big a short... read more. If you have passed Last Stand Tavern on the left or the fire station on the right you have gone too far. Provide flushing flows in the Williams Fork and Fraser River basins. Motor vehicles — including cars, trucks, motorcycles, minibikes, snowmobiles, four-wheel drive or other recreational vehicles — may not be operated unless the area is specifically designated and posted to permit the operation of such vehicle in the area. Gross Reservoir was completed in 1954 and named for Denver Water former Chief Engineer Dwight D. Gross. Named for Denver Water former Chief Engineer Dwight D. Gross, the reservoir was completed in 1954. Provide $1 million to the Upper Colorado River Wild and Scenic Management group to fund flow-related projects to protect the outstanding and remarkable values within segments of the Upper Colorado River. Privacy Policy, Final federal approval secured for Gross Reservoir Expansion Project. Standing 340 feet above the South Boulder Creek streambed, Gross Dam contains some 627,559 cubic yards of concrete. Completed in 1954, the reservoir has a surface area of 440 acres, and the spillway sits at 7,225 feet elevation.The reservoir receives water from the western side of the Continental Divide through the Moffat Tunnel. A view from where a dam would stand to form the potential Maroon Creek Reservoir. All watercraft are subject to U.S. Coast Guard and CPW safety standards and will be subject to safety inspections. Ellen Malan, of Denver, relaxes at Gross Reservoir outside Boulder on July 1, 2019. 340. Pet waste shall be removed immediately. The Gross Reservoir Expansion Project will raise the height of the existing dam, completed in 1954, by 131 feet, allowing the reservoir to nearly triple in size. If your building has been shut down for a prolonged period beware of water stagnation. It’s filled with water from western Colorado that’s pumped under the Continental Divide through the Moffat Tunnel. Prohibited: Trailer-hitched boats, motorized boats (gas or electric), sailboats and belly boats; single-chambered flotation devices, including inner tubes and inflatable mattresses. Our Design Standards page gives you everything you need at your fingertips. Denver Water applied for a planned expansion of the Gross Reservoir Dam in southwest Boulder County, according to Denver Water statements at the March 14 meeting. The nearly 8100 major dams in the United States in 2006. We are upgrading and modernizing the northern portion of our water system. Denver Water (owner, operator, east side recreation manager): 303-634-3641 or Customer Care Contact Form. Get some answers. $13M. Have questions about lead? The lake, owned by Denver Water, is formed by a 340-foot-high concrete dam on South Boulder Creek. Denver Water estimates that in order to mix concrete for the expanded Gross Dam they will need to transport 55,700 tons of highly toxic coal fly ash from a location 350 miles away in Wyoming. This project will increase Gross Reservoir’s capacity to 119,000 total acre-feet by adding an additional 77,000 acre-feet. This short video summarizes Denver Water’s community commitments based on years of study and robust outreach to Gross Reservoir neighbors. The reservoir receives water from the western side of the Continental Divide through the Moffat Tunnel. The col… We do offer online one-on-one appointments with our project representatives who can answer your questions about the Gross Reservoir Expansion Project. Cross-Connection Control and Backflow Prevention Program, Tax Exemption Certificates, W-9 and ACH Payment Authorization, Pipe Replacement and Lead Reduction Program Work Areas, Denver Water's Operations Complex Redevelopment, Waterton Canyon/Strontia Springs Reservoir. It serves as a combination storage and regulating facility for water that flows under the Continental Divide through the Moffat Tunnel. Begin stream bank monitoring on the North Fork of the South Platte River and South Boulder Creek to identify erosion and/or unstable banks, and make repairs, as needed. Complete a stream restoration project on the Williams Fork River. Prohibited: Glass bottles or containers, except within an enclosed vehicle; depositing litter or waste in any place other than waste receptacles. Check out, “Searching for solutions to help trout keep their cool.”. Provide more than 1,000 acre-feet of water in Grand County for environmental purposes. TAP - Nov. 20, 2020 - "The data from the fish surveys are shared with Learning By Doing, a unique partnership between East and West Slope organizations in Colorado that focuses on maintaining the aquatic environment in Grand County and improving conditions when... October 16, 2020 - TAP - "At Gross Reservoir, one of the most important reservoirs in Denver Water’s system, it’s time to replace the outlet works, a seven-month job so big it will require sawing up massive slabs of concrete and removing fat steel pipes so big a short... Boating recreation is closed at Gross reservoir. These rules and regulations are in addition to, and do not supersede, any otherwise applicable county, state and federal laws. It serves as a combination storage and regulating facility for water that flows under the Continental Divide through the Moffat Tunnel. The expansion project will raise the height of the existing Gross Reservoir dam, completed in 1954, by 131 feet, allowing the reservoir to nearly triple in size. ), and the Dam has a storage capacity of 254, 036 acre ft. Construction of the Dam … Gross Reservoir, with 440 acres of surface area, nestles among low mountains in the Front Range southwest of Boulder. Hiking: North Shore picnic area (trailhead to Rocky Point), South Side Dam, Miramonte picnic area and Osprey Point (trailhead), to South Boulder Creek inlet. Get up to a $100 rebate on a WaterSense-labeled toilet. Good for drivers, bad for the Fraser River, Keep it cool: Good for the Fraser River and its trout, Searching for solutions to help trout keep their cool, Gross Reservoir Expansion Proposal Presents Water Demand, Environmental Concerns. Construct and maintain sediment pond on Berthoud Pass to keep the Fraser River bottom clean. Have you visited recently or planning to visit soon? Gross Reservoir is perched at 7,500 feet above sea level, located above Boulder along the South Boulder Creek Drainage. Create an environmental pool in Gross Reservoir that will be managed by the Cities of Boulder and Lafayette to provide flows into South Boulder Creek during periods of low or no flows. Carry-on boating has allowed Gross to become a frequent fishing destination for Front Range anglers. There are no RV hookups. It serves as a combination storage and regulating facility for water that flows under the Continental Divide through the Moffat Tunnel. This is a rugged spot for tents, but make sure you’re in the right spots. Ice fishing allowed only when conditions permit. Dogs are also able to use this trail but must be kept on leash. Provide $6 million to Grand County to use towards environmental projects, and continue to participate in the “. The Dillon Reservoir is owned and operated by Denver Water, and is their largest water storage facility. Gross Reservoir has a surface … This compact requires that a certain amount of water be left in the river for the lower basin. Gross Res is a stunning alpine body of water that is open to the public for free. Gate on south dam road subject to being opened and closed by Denver Water staff. Monitor stream temperatures and water quality in Gross Reservoir, South Boulder Creek and the Fraser River Basin. No household waste, hazardous materials or materials not from the reservoir site may be placed in any Denver Water waste receptacle. Take Flagstaff Road west until it turns into Gross Dam Road. The National Inventory of Dams defines a major dam as being 50 feet (15 m) tall with a storage capacity of at least 5,000 acre feet (6,200,000 m 3), or of any height with a storage capacity of 25,000 acre feet (31,000,000 m 3). If we do find ourselves amid a major water shortage the demands from the lower basin states will drain any reservoir with such junior rights as Aspen’s (1971). Ice fishing when conditions permit. South Boulder Creek flows out of the 340 foot-high dam. Boulder, Colorado. No available parking for trailers/campers/RVs/ and buses. The Reservoir has a capacity of 257,304 acre ft. (1 acre ft. = 325,851 gal. Kayak access to the river below the reservoir is available at the parking area below the dam. Protect raptor species, fight invasive species, relocate rare plant species and responsibly remove trees and brush in the reservoir’s expanded footprint. The Gross Reservoir Expansion Project would, among other things, increase the reservoir’s current capacity by 77,000 acre-feet of water. Follow the journey of water from snowflake to tap. Out of concern for the safety of our employees and community, Denver Water has suspended in-person office hours and events indefinitely. The east side of the reservoir is open year-round, and open to boating from May to September, but the west side is closed during the winter. Just a short drive from Boulder, Gross Reservoir offers tremendous, but primitive outdoor experiences. Overnight camping on Denver Water property is prohibited. On July 17, 2020, the Federal Energy Regulatory Commission ordered Denver Water to proceed with design and construction to expand the reservoir. Proceed at your own risk. Allow Grand County to store up to 2,500 acre-feet of water in Williams Fork Reservoir for environmental purposes. Current conditions, fishing reports, maps, water levels, boating, camping, articles, blogs, and photos. Vehicles may not be left parked and unattended at any time from sunset to sunrise, even in designated areas. Fishing is subject to all state regulations enforced by Colorado Parks and Wildlife statutes. The higher dam will expand the capacity of the reservoir in Boulder County by 77,000 acre-feet. “The project will only take... Nov. 30, 2020 - Beginning the week of Nov. 30, Denver Water will be performing a safety project at the Osprey Point boat ramp at Gross Reservoir. Snagging kokanee permitted Sept. 1 to Jan. 31 only. Provide funding towards Colorado Parks and Wildlife’s cutthroat trout habitat projects to protect and restore native trout populations. If … Prohibited: Firearms, fireworks or any projectile weapons of any kind. Ruedi Reservoir - fishing in Basalt, Colorado. “The (current outlet works) is really at the end of its service life,” Raitt said. Also, read more on our Community Responsiveness page and on DenverWaterTAP.org ! Only non-motorized car top boats are permitted on reservoir (car top boats are those that can be lifted onto and taken from the top of a passenger vehicle and are no more than 18 feet in length). 72,000 acre-feet will be for Denver Water use and 5,000 acre-feet will go to the environmental pool that provides additional water for South … Check out, “Good for drivers, bad for the Fraser River.”, Restore a portion of Fraser Flats in Grand County. Gross Reservoir, located in Boulder County, Colorado, is owned and operated by Denver Water. Standing 340 feet above the South Boulder Creek streambed, Gross Dam contains some 627,559 cubic yards of concrete. Treat your curiosity about water quality to a virtual tour of our potable treatment process. Watercraft are allowed on the Friday of Memorial Day weekend through Sept. 30. Gross Dam Road will take you to both the north and south access points. South Boulder Creek flows out of the 340 foot-high dam. $464M. Camping: The Winiger Ridge campground site is comanaged by Denver Water and the U.S. Forrest Service and is subject to state or local fire bans that may be posted. It serves as a combination storage and regulating facility for water that flows under the Continental Divide through the Moffat Tunnel. Take Highway 93 north from Golden to Highway 72. Complete a stream restoration project on South Boulder Creek. Through a cooperative process, replace culverts on Fraser River, Cabin Creek and St. Louis Creek with aquatic organism passage culverts that will enable free passage of fish and other aquatic organisms. Likewise, camping is primitive. Denver Water plans to raise the dam there by 131 feet and to … Find your next place to play at any of our recreation areas. Boating: Friday of Memorial Day weekend to Sept. 30, West side U.S. Forest Service closes late fall to early spring. Local residents and environmental groups are fighting against the expansion due to concerns about environmental impacts and the lack of conservation … Continue to participate in the U.S. Launching and landing drones/RC airplanes is prohibited on Denver Water property. If you have questions, please contact us. It is unlawful to operate watercraft under the influence of alcohol or drugs. Fires of any kind are only permitted in grills and fire grates provided at designated sites. All rights reserved. The Gross Reservoir Expansion Project is a major component of Denver Water’s long-term, multi-pronged approach to deliver safe, reliable water to the more than 1.5 million residents in our service area today and many of the projected millions who will call Colorado home in the decades to come. Gross Dam and Reservoir, completed in 1954 on South Boulder Creek, is capable of holding about 40,000 acre feet of water carried from the Fraser River through the Moffat Tunnel. Length 5.2 miElevation gain 980 ftRoute type Out & back You can go fishing, hiking, camping, paddling and picnicking here; take out a boat, too, but no motors allowed. Jeff Martin, Denver Water’s program manager on the Gross Reservoir Expansion Project sits for an interview about the project goals, core values and minimizing inconvenience to our neighbors. Expanding Gross Reservoir will help protect our customers from negative impacts of a future drought and shortfalls in our overall water storage system. Gross Reservoir has a surface area of 440 acres and 10.9 miles of shoreline. “The project itself was shaped and designed to avoid damaging or affecting flows in the driest of years,” he said. Law Week Colorado - Nov. 24, 2020 - "... the agreement obligates Denver Water to reduce diversions during drought years. No body contact with water is permitted: swimming, wading and diving are prohibited. This was a pure chance encounter, and one worth making! ASPEN – The city of Aspen filed two applications Monday in Division 5 Water Court for “finding of reasonable diligence” on the conditional water rights it has maintained since 1965 for the potential storage reservoirs on upper Castle and Maroon creeks. Only portable ice fishing shelters are permitted and must be removed from surface of lake when not in use. Just 11 miles from Downtown Boulder, Denver Water proposes to enlarge the current Gross Dam, resulting in the biggest and most environmentally damaging construction project in Boulder County history. Picnicking: Limited picnicking is now available, though larger picnic area shelters located on the east side of the reservoir are closed until further notice. The trail offers a number of activity options and is accessible year-round. Check out, “Keep it cool: Good for the Fraser River and its trout.”, Release water into Ranch Creek in response to high temperatures found through water temperature monitoring. It was built for water storage and as a regulating facility for waters from the Western Slope transferred through the Moffat Tunnel. Boating: Car-top non-motorized boating only, allowed on the Friday of Memorial Day weekend through Sept. 30. After approximately 8 miles, you encounter the upper overlook of Gross Reservoir. Ground or open fires of any type are prohibited. U.S. Forest Service Boulder district: 303-541-2500, Colorado Parks and Wildlife: 303-291-7227, © 2021 Denver Water.
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