Protect raptor species, fight invasive species, relocate rare plant species and responsibly remove trees and brush in the reservoir’s expanded footprint. Follow the journey of water from snowflake to tap. The reservoir was built to store water from the West Slope traveling through the Moffat Tunnel and from South Boulder Creek. General Information: Gross Reservoir (440 surface acres) is a storage reservoir owned and operated by Denver Water. If you have passed Last Stand Tavern on the left or the fire station on the right you have gone too far. 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. The col… Gross Dam is a 340 foot tall concrete gravity dam. Proceed at your own risk. Gross Reservoir is about an hour outside of Boulder and is home to great dispersed camping, numerous hiking trails, and a small amount of climbing. Prohibited: Trailer-hitched boats, motorized boats (gas or electric), sailboats and belly boats; single-chambered flotation devices, including inner tubes and inflatable mattresses. This was a pure chance encounter, and one worth making! Denver Water, as the city’s main water supply company is called, operates four collection systems to capture water for the city, three of which collect water from the western slope of the Continental Divide, using the watersheds of the Fraser, Williams Fork, and Blue Rivers. Fishing: Cold water, stocked by Colorado Parks and Wildlife. All fires are subject to county bans. Ice covered the surface of Gross Reservoir in southwestern Boulder County in January 2019. 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. Prohibited: Firearms, fireworks or any projectile weapons of any kind. When completed, Gross Reservoir will be able to hold an additional 77,000 acre-feet of water — more than 25 billion gallons. Richard Hackett, Boulder County. 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 person can walk through them. Fires of any kind are only permitted in grills and fire grates provided at designated sites. See recent headlines. Denver Water does not monitor ice conditions, therefore it is important to be aware of changing ice conditions. “The original engineers designed the dam so that it could be raised twice, if needed,” said Jeff Martin, Gross Reservoir project manager. The 440-acre lake is 7,500 feet above sea level with the peaks of the Colorado Rockies looking down from the west. The lake, owned by Denver Water, is formed by a 340-foot-high concrete dam on South Boulder Creek. No household waste, hazardous materials or materials not from the reservoir site may be placed in any Denver Water waste receptacle. Gross Reservoir Dam outside Boulder, on Monday, July 1, 2019. If your building has been shut down for a prolonged period beware of water stagnation. Kayak access to the river below the reservoir is available at the parking area below the dam. Denver Water plans to raise the dam there by 131 feet and to expand the capacity of the reservoir … The intersection has the Coal Creek Canyon Improvement Association Hall and United Power offices. 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. Gross Dam was built in the early 1950s and was designed to be expanded in the future to increase water storage capacity. Perhaps the best-kept secret in Boulder County is the Gross Reservoir built back in 1954 to capture the water from the South Boulder Creek drainage. Gross Reservoir is perched at 7,500 feet above sea level, located above Boulder along the South Boulder Creek Drainage. Provide more than 1,000 acre-feet of water in Grand County for environmental purposes. All rights reserved. By not requesting a rehearing of the Federal Energy Regulatory Commission’s (FERC) decision to take jurisdiction over the Gross Dam and Reservoir … Open to ice fishing. Privacy Policy. Find your next place to play at any of our recreation areas. 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... Beginning the week of Nov. 30, Denver Water will be performing a safety project at the Osprey Point boat ramp at Gross Reservoir. Beginning the week of Nov. 30, Denver Water will be performing a safety project at the Osprey Point boat ramp at Gross Reservoir. This raise will be constructed with a construction method known as a downstream buttress, which will use the existing dam as formwork. Gross Reservoir has a surface area of 440 acres and 10.9 miles of shoreline. Pet waste shall be removed immediately. 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. We do offer online one-on-one appointments with our project representatives who can answer your questions about the Gross Reservoir Expansion Project. “There is nothing on the record that Denver Water had any well-established development rights to expand Gross Dam and Gross Reservoir prior to May 17, 1974,” he ruled. Prohibited: Glass bottles or containers, except within an enclosed vehicle; depositing litter or waste in any place other than waste receptacles. 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. Find out what projects we're doing to improve our system. All watercraft are subject to U.S. Coast Guard and CPW safety standards and will be subject to safety inspections. 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. Please give us feedback. Osprey Point, the Inlet Trail and the Miramonte Picnic Area will be closed the week of Nov. 30 because of safety project. Provide $6 million to Grand County to use towards environmental projects, and continue to participate in the “. A safety project at the Osprey Point boat ramp will force closures of some areas. Access to South Side Dam and Windy Point recreation areas remain accessible. Sign up to receive Denver Water’s weekly TAP Headlines. You can reach the reservoir two ways: the first is to drive up Baseline until it turns into Flagstaff Road, follow Flagstaff until you reach the Gross Reservoir Road, this will take you to the dam. 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). The application is currently under review. Gross Reservoir, with 440 acres of surface area, nestles among low mountains in the Front Range southwest of Boulder. From Boulder take Baseline Rd. Have you visited recently or planning to visit soon? Dogs are also able to use this trail but must be kept on leash. Complete a stream restoration project on the Williams Fork River. Standing 340 feet above the South Boulder Creek streambed, Gross Dam contains some 627,559 cubic yards of concrete. Law Week Colorado - Nov. 24, 2020 - "... the agreement obligates Denver Water to reduce diversions during drought years. for the proposed expansion of Gross Dam and Reservoir. Take Flagstaff Road west until it turns into Gross Dam Road. This is a rugged spot for tents, but make sure you’re in the right spots. © 2020 Denver Water. Gross Dam Road will take you to both the north and south access points. Shore angling and limited boat access (see regulations) are allowed. 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. It’s filled with water from western Colorado that’s pumped under the Continental Divide through the Moffat Tunnel. Completed in 1954, the reservoir has a surface area of 440 acres, and the spillway sits at 7,225 feet elevation. Raising the dam. It serves as a combination storage and regulating facility for water that flows under the Continental Divide through the Moffat Tunnel. Monitor stream temperatures and water quality in Gross Reservoir, South Boulder Creek and the Fraser River Basin. Trespassing is prohibited on dam structure or within any fenced area, facility or areas posted with closure or danger signs. Pedestrian use only on all Gross reservoir trails. The enlarged dam will increase the capacity of the reservoir by 77,000 acre-feet, and includes 5,000 acre-feet of storage dedicated to South Boulder Creek … 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. Provide flushing flows in the Williams Fork and Fraser River basins. Our Design Standards page gives you everything you need at your fingertips. Construct and maintain sediment pond on Berthoud Pass to keep the Fraser River bottom clean. If you have questions, please contact us. 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 … Anglers can expect to catch rainbow trout, brown trout, lake trout, splake, kokanee salmon and tiger muskie. 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. A Denver Water truck drives by Gross Dam in Boulder County on Wednesday. Gross Reservoir, located in Boulder County, Colorado, is owned and operated by Denver Water. Aging outlet works at base of Denver Water dam call for major upgrade to valves, pipes. Snagging kokanee permitted Sept. 1 to Jan. 31 only. Provide $2 million towards aquatic habitat improvements on the Upper Colorado River. Get up to a $100 rebate on a WaterSense-labeled toilet. The reservoir receives water from the western side of the Continental Divide through the Moffat Tunnel. Complete a stream restoration project on South Boulder Creek. We invite you to search for an available time and book an online meeting here. 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. Construct a fish ladder on Cabin Creek in Grand County. Allow Grand County to store up to 2,500 acre-feet of water in Williams Fork Reservoir for environmental purposes. Named for Denver Water former Chief Engineer Dwight D. Gross, the reservoir was completed in 1954. No body contact with water is permitted: swimming, wading and diving are prohibited. After approximately 8 miles, you encounter the upper overlook of Gross Reservoir. These rules and regulations are in addition to, and do not supersede, any otherwise applicable county, state and federal laws. (Chris Schneider, Special to The Colorado Sun) Gross Reservoir lies in the foothills above Boulder Colorado. On July 17, 2020, the Federal Energy Regulatory Commission ordered Denver Water to proceed with design and construction to expand the reservoir. Gross Reservoir was completed in 1954 and named for Denver Water former Chief Engineer Dwight D. Gross. Continue to participate in the U.S. We decided to adventure out and looked west of Boulder; we took Baseline Rd west and then turned right to ascend up Flagstaff Road. Hiking: North Shore picnic area (trailhead to Rocky Point), South Side Dam, Miramonte picnic area and Osprey Point (trailhead), to South Boulder Creek inlet. Gross Reservoir Dam Project now subject to local 1041 review. Boating: Car-top non-motorized boating only, allowed on the Friday of Memorial Day weekend through Sept. 30. The outlet works are a critical part of any big dam. “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. For more information call. The higher dam will expand the capacity of the reservoir in Boulder County by 77,000 acre-feet. No available parking for trailers/campers/RVs/ and buses. In addition to leading the fight to stop the proposed Gross Reservoir Expansion, members of TEG have formed multiple organizations over the past 20 years to support fire and flood mitigation and to help residents in need. The reservoir will be open to monitoring and enforcement by CPW. When complete, Gross Reservoir will be able to hold 119,000 acre-feet, second only to Dillon Reservoir in Summit County, which is capable of holding just north of 257,000 acre-feet. Image credit: Denver Water. 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. Carry-on boating has allowed Gross to become a frequent fishing destination for Front Range anglers. The Gross Reservoir is the main reservoir for water crossing over the Continental Divide through the Moffat tunnel. Hike the Gill Trail to catch scenic views of Cheesman Reservoir. Domestic animals shall be kept on leash or lead and under human physical control at all times. Length 5.2 miElevation gain 980 ftRoute type Out & back Parking is permitted only in designated parking lots or defined spaces. Watercraft are allowed on the Friday of Memorial Day weekend through Sept. 30. 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. Ground or open fires of any type are prohibited. Help us improve your recreation experience! Likewise, camping is primitive. The Nederland town board is asking Boulder County commissioners to deny the expansion of Gross Reservoir. 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. Camping: The Winiger Ridge campground is currently closed, pursuant to the U.S. Forest Service temporary closures for forest land due to unprecedented and historic fire conditions. 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. Overnight camping on Denver Water property is prohibited. Using watercraft during posted emergency closures is prohibited. Standing 340 feet above the South Boulder Creek streambed, Gross Dam contains some 627,559 cubic yards of concrete. Boating: Friday of Memorial Day weekend to Sept. 30, West side U.S. Forest Service closes late fall to early spring. 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. U.S. Forest Service Boulder district: 303-541-2500, Colorado Parks and Wildlife: 303-291-7227. “The project itself was shaped and designed to avoid damaging or affecting flows in the driest of years,” he said. Only portable ice fishing shelters are permitted and must be removed from surface of lake when not in use. We are upgrading and modernizing the northern portion of our water system. Final federal approval secured for Gross Reservoir Expansion Project. Gross Reservoir, located in Boulder County, Colorado, is owned and operated by Denver Water. The expansion project at Gross Reservoir will raise the dam 131 feet to a final height of 471 feet. Raising the dam will increase the reservoir’s storage capacity by 77,000 acre-feet of water and make Gross Reservoir the second-largest in Denver Water’s system. To ensure public safety, this area including the Inlet Trail and Miramonte Picnic Area will be closed to the public while work is performed over the next three weeks, weather dependent. Get some answers. Launching and landing drones/RC airplanes is prohibited on Denver Water property. There are no RV hookups. Turn left (west) on Highway 72 toward Pinecliffe to County Road 77/Gross Dam Road. Gross Res is a stunning alpine body of water that is open to the public for free. on left, follow signs to … This definitely is worth the stop to take in the views. Out of concern for the safety of our employees and community, Denver Water has suspended in-person office hours and events indefinitely. You can go fishing, hiking, camping, paddling and picnicking here; take out a boat, too, but no motors allowed. Check out, “Searching for solutions to help trout keep their cool.”. Denver Water (owner, operator, east side recreation manager): 303-634-3641 or Customer Care Contact Form. To ensure public safety, this area including the Inlet Trail and Miramonte Picnic Area will be closed to the public while work is performed over the next three weeks, weather dependent. What is the Gross Reservoir Expansion Project? to Flagstaff Rd., continue climbing for 9 miles to Gross Dam Rd. We are committed to being a good neighbor during construction projects. Also, read more on our Community Responsiveness page and on DenverWaterTAP.org ! It was built for water storage and as a regulating facility for waters from the Western Slope transferred through the Moffat Tunnel. Have questions about lead? It serves as a combination storage and regulating facility for water that flows under the Continental Divide through the Moffat Tunnel. Ice fishing when conditions permit. 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. Vehicles may not be left parked and unattended at any time from sunset to sunrise, even in designated areas. Provide funding towards Colorado Parks and Wildlife’s cutthroat trout habitat projects to protect and restore native trout populations. On September 21, 2020, Denver Water submitted an Areas and Activities of State Interest (1041) review application to the Boulder County Community Planning & Permitting Dept. While this is not a Boulder County project, the reservoir resides entirely in unincorporated Boulder County.

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