Ashland Reservoir: Treated Water Tank Replacement

Contact

Kiewit: Nicholas Raley, 303-237-2593.

Denver Water: Matt Wittern, 303-628-6304 or Heather Stauffer, 303-628-6663

Denver Water is improving the safety and reliability of its Ashland Reservoir site by building two new underground water storage tanks.

The project is phased for contractor Western Summit to demolish and replace one tank at a time. The two tanks could not be demolished at the same time because the water stored at the site is needed for customers and for fire protection. The entire project is scheduled to run through 2017.

The new, circular tanks are smaller in size and footprint, allowing space for a larger landscaped area on the south side of the property. The chain link fence will be replaced with a black, 8-foot-high ornamental steel fence.

Soil removed from the site is hauled to 20th and Quail Street for storage.

History of the site

Crews build a new wood roof on Ashland Treated Water Reservoir in this 1914 photo.The Ashland site dates back to the 1890s, when it had open air reservoirs with earthen bottoms.

In the 1910s and early 1920s, concrete floors and wood roofs were added to the reservoirs. The wood roofs were replaced with precast concrete in the 1960s and early 1970s.

Despite routine maintenance and significant repairs, the tanks experienced leaks, and some of the precast roof sections cracked. The tanks reached the end of their useful lives, and continued repairs would have been impractical.

Improvements to Denver Water's delivery system make it possible to reduce storage at the site from 41 million gallons to 20 million gallons.

When Ashland was constructed, it was one of a handful of storage sites for treated water. Denver Water now has many treated water storage tanks in its delivery system.

Anticipated timeline

Action Date
29th Avenue and Fenton Street intersection closure — pipe rehab Late April to late May 2016
Place roof deck on east tank
June 2016
29th Avenue and Gray intersection closure Late fall 2016
Single lane closure on 29th Avenue Multiple times throughout fall 2016
Backfill site March 2017
Landscaping, paving and sidewalks April 2017
Complete construction June 2017

Updates

  • March 2017
    • If you’ve been by the Ashland Reservoir site lately, you’ll notice that both circular underground tanks are fully constructed. Crews are putting the final touches on Tank No. 1 and we look forward to getting that put into service about mid-March.
    • Backfilling work continues on-site, bringing back a portion of the approximately 80,000 cubic yards of earth that was previously excavated to reconstruct the tanks. We expect crews to continue backfilling until the end of this month.
    • Work also continues on Conduit 3, one of the large underground pipes used to transport water throughout the system. Currently, Conduit 3 is out of service and water is being delivered to customers through Conduit 1. When ready, reconnecting the conduit back to the system will require a one-lane closure on 26th Avenue, which should last several days. 
    • In mid-March we are tentatively planning to perform work in the intersection of North Depew Street and West 29th Avenue. Crews will excavate deep underground to install a concrete vault. Vaults allow our staff access to the conduits under the street and are important for maintenance of the distribution system. West 29th Avenue will be open for the majority of this work, but some short-term closures will be required toward the end of the installation. We estimate that this work will take approximately four months to complete.  
    • Toward the end of March we plan on performing maintenance in an existing valve vault beneath 29th Avenue just west of Sheridan Boulevard. We estimate that this work will take about one week to complete. 
    • Installation of the permanent decorative iron perimeter fence is set to start by the beginning of April and will be performed in phases as construction on the site permits. Installation will most likely start on the west side of the property, and we do not expect to need access to any neighbors’ properties in order to install the fence. If we do, however, we will contact neighbors directly to ask for permission to access their property.
    • Finally, Denver Water is planning a large utility maintenance project that will significantly impact the intersection of 29th Avenue and Sheridan Boulevard starting in early April and continuing through the beginning of July. We’re working with the cities of Wheat Ridge and Denver, as well as the Colorado Department of Transportation, to design the work to minimize public inconvenience, but we expect the need to close the intersection for several weekends. Look for more information as these plans come into better focus.
  • Nov. 7, 2015

    Crews, using roughly 1,250 cubic yards of concrete, place the floor slab for Tank 1 (east tank).

  • Aug. 10, 2015

    Ashland Reservoir treated water tank replacement project, summer 2015Crews are finished placing structural fill for Tank 1, and they are placing lower wall lift rebar for the outlet structure as well as rebar for the inlet and outlet wall pipes.

    Work continues to install embedded conduit for the inlet structure.

     

     

     

  • Feb. 13, 2015

    The west tank is constructed and in service, and the earthwork contractor is installing the tank's underdrain piping. East basin demolition begins in mid-February and will last for about four months. 

  • Aug. 18, 2014

    The work on the roof slab for the west tank began at 5 a.m. and wrapped up by the afternoon.

    Denver Water and its contractors appreciate the early start granted by the City of Wheat Ridge. The approximate 1,560 cubic yards of concrete delivered to the site had to be placed in a continuous single day.

    We realize neighbors were inconvenienced by the early start time. We appreciate the continual cooperation of neighbors as work is done on this important water project.

    Throughout its morning show, 9News highlighted the concrete placement and the importance of the reservoir.

    Crews placed 1,560 cubic yards of concrete to complete the 256-foot-diameter roof on Aug. 18, 2014. If you took all the concrete placed on the roof and spread it across Sports Authority Field from goal line to goal line and sideline to sideline, it would be about 10-and-a-half inches deep.

  • Aug. 12, 2014

    The roof slab for the west tank will be placed on Monday, Aug. 18, 2014. The concrete placement will start at 5 a.m. We anticipate there will be little noise associated with the prep work.

    A concrete pump truck will be parked on 30th Avenue. Concrete trucks will be delivering material to the pump truck throughout the day. As a result, PDF document parking on 30th Avenue between Fenton Street and Harlan Street will be limited. 

    Crews working on the placement will park at the Sons of Italy Hall to minimize parking impacts in the neighborhood. There will be a designated public viewing area east of the construction trailers on 30th Avenue. 

    There will be traffic control on 29th Avenue between Sheridan Boulevard and Gray Street because of the high number of concrete trucks accessing the site on Monday. 

    Summary of Activities:

    • Four concrete pumping trucks will be in use, three in the excavation and one pump located on 30th Avenue.
    • Aggregate Industries will dedicate two of their batch plants for the placement.
    • The diameter of the roof is 256 feet.
    • Approximately 1,560 cubic yards of concrete will be placed.
    • 60-70 personnel will be assisting with the placement of the roof.
    • Placement will start at 5 a.m. and is anticipated to be completed by 4 p.m.
    • Lights will be used at the site on the morning of Aug. 18 to ensure employee safety and visibility during the slab placement.
  • July 7, 2014

    July updateCrews are finishing up the plywood decking in preparation for the west tank roof slab.  Rebar and post-tensioning cables will be installed once the decking is in place.

    Cuts have been made in the north wall of the old tank so crews can install pipe encasements. T. Lowell Construction will begin work on an underground vault located on West 30th Avenue, between Gray Street and Fenton Street. Notices will be distributed to neighbors impacted by the work on 30th Avenue.  

  • May 27, 2014

    West tank at Ashland Reservoir

    The last wall of the west tank has been placed. Work inside the tank, and preparations for the lid placement, will continue through mid-July.

     

     

  • April 2, 2014

    Columns and walls April 2014Walls and columns will continue to be placed during the next few months.

     

     

     

     

     

  • March 6, 2014

    Ashland_tank_wallsCrews build the wall and column forms in this photo. The walls and columns will be placed for the next two months and will be completed in mid-May. Halfway through the wall and column pours, erection of the tanks roof shoring will begin to support the construction of the concrete roof, which is scheduled to be poured at the end of June. 

     

     

  • Jan. 22, 2014

    The base slab for the west tank was placed on Saturday. The last concrete truck left the site at 4:20 p.m. The “No Parking” signs along Fenton Street were down by 4 p.m. Crews remained on site through the evening to complete the finish work.

    Many neighbors of the site stopped by to observe the pour. We appreciate the neighborhood’s cooperation as this important weekend work occurred.

    Denver's 9 News and CBS 4 covered the pour during their newscasts.

    Over the next five to six months, the walls and columns for the tank will be constructed. Concrete trucks will deliver regularly to the site during this construction phase.

  • Jan. 15, 2014

    The base slab for the west tank will be placed on Saturday, Jan. 18, 2014. The concrete placement will start at 7 a.m. Prep work for the arrival of concrete will begin at 5 a.m. We anticipate there will be little noise associated with the prep work. 

    A concrete pump truck will be parked on 30th Avenue. Concrete trucks will be delivering material to the pump truck throughout the day. As a result parking on 30th Avenue between Fenton Street and Harlan Street will be limited. 

    Crews working on the placement will park at the Sons of Italy Hall to minimize parking impacts in the neighborhood. There will be a designated public viewing area east of the construction trailers on 30th Avenue. 

    There will be a traffic control on 29th Avenue between Sheridan Boulevard and Gray Street because of the high number of concrete trucks accessing the site on Saturday. 

    Summary of Activities:

    • Four concrete pumping trucks will be in use, three in the excavation and one pump located on 30th Avenue.
    • Aggregate Industries will dedicate two of their batch plants for the placement.
    • The diameter of the slab is 256 feet.
    • Approximately 1,270 cubic yards of concrete will be placed.
    • 60-70 personnel will be assisting with the placement of the base slab.
    • Prep work begins at 5 a.m., placement will start at 7 a.m. and is anticipated to be completed by 4 p.m.
    • Finish work on the slab will continue into the evening. Lights will be used at the site on the evening on the 18th.
  • Jan. 9, 2014

    This weekend, Jan. 11 and 12, crews will be working at the Ashland site. The city of Wheat Ridge has granted permission for the weekend work hours. Crews will be installing post tension cables in preparation for the pour of the base slab of the west tank.    

    Jan. 18 has been set as a tentative pour date for the base slab. This date will change if unfavorable weather is forecast. Updates will be sent and posted next week. Weekend work hours could continue until the day of the pour. On the day of the pour, a high volume of concrete trucks will deliver to the site. The base slab must be poured in one day. Again updates and more information will be sent next week.  

  • Dec. 12, 2013

    The concrete form work for the base slab on the west tank has been installed. The steel reinforcement, as well as the post tensioning strands, are being set in place. 

    The tentative pour date for the concrete slab on the west tank is scheduled for Saturday, Jan. 11. This date may change because of weather conditions. In order to pour the concrete properly, optimal weather conditions are required. Please check the website for updates on the pour date. 

    Twenty-ninth Avenue from Fenton Street to Ingalls Street is closed to through traffic to allow the installation of a drain line for the west tank. The subcontractor for the drain line project is working from 7 a.m. to 7 p.m., seven days a week in order to reopen the street by Christmas. 

    The Ashland Project will be shut down on Dec. 25 and Jan. 1.

  • Oct. 28, 2013

    The direction drill project on Gray Street from 28th Avenue to 29th Avenue has been completed. The road has been repaved and is open. 

    A second direction drill project will be required from the Ashland site to 29th Avenue. The work will take place at the end of November and will take two weeks to complete. 

    Most of the structural fill material needed for the area underneath the tank floor slab has been delivered to the Ashland site. The west tank under slab piping is being installed and will be completed within two weeks. Once the under slab piping is complete, work will begin on setting forms for the west tank floor slab.

  • Oct. 1, 2013

    As of Saturday, the drilling and reaming for the installation of the new 16-inch drain line for the new water tanks at the Ashland Reservoir Tank Replacement Project was completed. 

    Starting today at 7 a.m., our subcontractor will begin pulling the 16-inch HDPE pipe into the drilled hole on Gray Street starting from the Ashland Reservoir on 29th Avenue to 28th Avenue. Crews will pull the pipe using the drill rig that is currently set up on 28th Avenue. 

    The trick with pulling the pipe is that once they start, they cannot stop until the pipe is pulled to its permanent position.

    We hope this activity will not exceed our elated 7 a.m. to 5 p.m. window; however, the City of Wheat Ridge has granted WSCI permission to stay as long as needed to complete the activity. 

    Once the new 16-inch drain line is pulled, WSCI and our subcontractors will take roughly two weeks to tie the new 16-inch drain line into the existing drain system, backfill the excavated drill pits and repave the area, demobilize and clean the construction area at 28th at which time Gray Street will be re-opened.

    WSCI would like to thank the local community affected by the installation of new drain line and appreciates your cooperation and understanding. 

  • Sept. 20, 2013

    The Ashland Reservoir Tank Replacement Project was shut down for a week and a half due to heavy rain. Work has been done to dewater and dry the site.  As of Thursday, Sept. 19, 2013, work resumed to scarify and re-compact the structural fill that was already in place. 

    Once the top layer of soil is re-compacted, more structural fill will be delivered to the site to prepare the subgrade for the installation of the under slab piping. The under slab piping will serve the new tank once the tank is placed into service.   

    The Gray Street drill operation was also delayed due to the heavy rain fall but work resumed Thursday. Western Summit hopes to turn Gray Street back over to the local community as soon as possible. 

    The majority of the excavated soil has been hauled to the soil storage site at 20th and Quail in Lakewood. Once all the soil has been hauled to the storage site, work will be done to stabilize the piles of soil. Dust prevention measures will be put in place at the site and the site will be regularly checked by Western Summit staff.   

  • Aug. 21, 2013

    The over-excavation for the construction of the west water tank is nearly complete.The over-excavation for the construction of the west water tank is nearly complete. Soil being hauled to the soil storage site at 20th and Quail will be minimal until the construction of the second tank begins. Once the soil at the 20th and Quail site is placed, measurements will be taken to maintain and control the dirt and dust from leaving the site.

    Once the excavation process is completed, the west tank under slab piping will be installed. The construction on Gray Street from 28th Avenue to the Ashland project site continues and is scheduled to be complete in early September.

  • July 24, 2013

    The installation of a shoring wall for site access is complete. The construction of a second shoring wall along the western most slope of the project site has begun.

    Work is being done on the temporary dewatering system for the west tank, and once complete, excavation will continue. Excess soil from the Ashland site will continue to be hauled to the temporary storage facility at 20th Avenue and Quail Street in Lakewood. The soil will be hauled using the PDF document designated route. Best management practices have been installed at the soil storage site to control dust and water runoff. 

    Trucks have continued to haul debris from the west basin demolition using designated haul routes. The haul trucks are required to be covered. Western Summit Constructors has been monitoring the hauling contractor at several sites along the routes.
     
    A permit from the City of Wheat Ridge has been obtained to perform a directional drill for a new drain line on Gray Street. A drill rig will be set up at the intersection of 28th Avenue and Gray Street to drill the new drain line north to the Ashland Reservoir. This activity will not allow through traffic on Gray Street from 26th Avenue to 29th Avenue. However local residents will be allowed to access their driveways during this street work. This work is schedule to take four weeks.

  • June 28, 2013

    Work has begun on the installation of the shoring wall located at the access ramp for the site. The shoring wall will protect the existing east basin. Work continues on the relocation of a storm sewer in the intersection of 29th and Gray.

    The work at 29th and Gray is scheduled to be completed by June 30. A construction fence has been installed at 20th and Quail where soil from the Ashland project will be stored. Trucks will haul soil from the Ashland site to 20th and Quail using the PDF document approved route

  • June 13, 2013

    As part of the work at the Ashland Reservoir site, T. Lowell Construction will be working in the intersection of 29th Avenue and Gray Street to relocate a portion of the storm sewer. The intersection will be closed June 19 — 21. Traffic will be detoured in both directions of 29th Avenue.

  • June 3, 2013

    The removal of the west basin's roof was completed on May 24. This past week, the demolition crew has been busy separating the disposable rubble from the recyclable concrete. Colorado Cleanup began hauling debris the morning of May 31 using the designated PDF document haul routes.

    The next phase of the project is to remove the west basin's concrete slab using excavators equipped with hydraulic jack hammers. Colorado Cleanup will continue to haul off the debris as the concrete slab is removed. Beginning mid-to-late June, work will be done on Gray Street and 29th Avenue. A notification of construction will be uploaded with dates of street closures before this work is to be done.

  • May 16, 2013

    Demolition has begun on the west tank at the Ashland Reservoir site and will continue through late June. Once the demolition of the west tank is complete, the construction of the new water tank will begin. The east tank must remain in service until the newly constructed west tank is completed and placed in service. Trucks will begin hauling off excavated soil and material from the site using the designated PDF document hauling route.

  • April 22, 2013

    Western Summit Constructors has received the necessary permit from the city of Wheat Ridge to begin demolition work. Work on the access road to the site off of 29th Avenue will be established. The installation of temporary fencing and sound barriers are scheduled to begin this week.

    Demolition of the west basin will begin once the prep work for the demolition is complete. The demolition and excavation subcontractor for the project is Colorado Cleanup. There will be other subcontractors on site, however, Western Summit will remain the point of contact for any questions or concerns residents or business may have with the project.

    The demolition process of the west tank is scheduled to take two months to complete.

    Work at 29th Avenue and Sheridan Boulevard will begin the week of April 29. Work will also be done at 29th Avenue and Fenton Street. These two sites are part of a project to isolate a pipeline, Conduit 23, connected to Ashland Reservoir. At times during the project, work will be done near Ashland Reservoir on pipelines and underground vaults that are connected to the Ashland Reservoir site.

  • April 4, 2013

    Construction trailers are on site and Western Summit has begun preparing for the removal of the roof on the west tank. Western Summit is working with the city of Wheat Ridge to secure the needed permits for the demolition. The removal of the roof will be noisy and will involve heavy equipment at the site.  

    PDF document notice regarding work on a pipeline under 29th Avenue was sent out recently. The work on this pipeline has been postponed until June. Once a start date for the work in 29th Avenue has been established, a notice will be distributed to neighbors. 

    To limit parking impacts from the project, all construction personnel on the project site have been parking their personal vehicles at the Wheat Ridge United Church of Christ on West 29th Avenue. Construction vehicles will be parked near the site.

  • Oct. 5, 2012

    The City of Wheat Ridge has approved a special use permit for the Ashland project. This permit spells out the approved haul routes and work hours, and describes the approved variances for fencing, landscaping and replacement of the existing water quality monitoring building.

    The permit requires most construction traffic to be routed east from the site on 29th Avenue, and then south on Sheridan Boulevard. The permit also limits construction parking within the neighborhood. Western Summit is currently negotiating parking lot rental with nearby organizations.

    Preliminary work inside the existing tanks will begin the week of Oct. 2. The work is scheduled to be complete by the end of this year. Demolishing existing tanks will not begin until early 2013.

Site information Notices to neighbors Photo simulations
(actual site will look different)
PDF document Site map  PDF document Feb. 7, 2012  PDF document Existing, looking northwest 
PDF document Haul route
PDF document Jan. 4, 2012  PDF document Proposed, looking northwest 
PDF document Construction route
PDF document Fall 2012  PDF document Looking southwest 
PDF document 29th and Gray traffic control plan
PDF document 20th and Quail
PDF document Looking southeast 
PDF document Gray Street drill traffic control plan
PDF document Spring 2013 PDF document Looking northeast 
PDF document Traffic map of Tank 2 roof slab concrete pour PDF document March 15, 2013  
PDF document Traffic map of Tank 1 base slab concrete pour
PDF document April 16, 2013  
  PDF document April 19, 2013  
  PDF document June 13, 2013  
  PDF document 20th and Quail — June 2013  
  PDF document July 2013 — Gray Street Drill Notification  
  PDF document August 2013 — Gray Street Drill Update  
  PDF document November 2013 — Gray Street closure
 
  PDF document January 2014 — Tank 2 concrete pour  
  PDF document July 2014 — West 30th Ave. and Fenton/Grey Street Closure  
  PDF document August 2014 — Tank 2 roof slab concrete pour  
  PDF document November 2015 — Tank 1 base slab concrete pour
 
  PDF document April 2016 — 29th Avenue and Fenton Street closure  
  PDF document March 2017 — Update to neighbors