January 20, 2011
The steel erector, Tybrook Erectors, is on site as well as the crane to erect the remainder of the trusses. The crane needed to be defrosted in order to off load it off the truck it travelled on.
Tybrook began erecting the remainder of the steel trusses over the clarifying tank area but the frigid temperatures have hampered progress.
The Happy Marmot Landscaping crew have been on site removing snow with the assistance of Gammie Trucking’s loader also doing snow clearing.
New crane arrival and defrosting in progress. January 11, 2012.
Steel shipment being offloaded by Gammie’s loader. January 13, 2012.
Happy Marmot crew removing snow accumulation in between clarifying tanks. January 10, 2012.
Two Tybrook workers installing purlin beams and using a torque wrench to tighten down bolt connections. January 13, 2012.
Progress of Truss Installation. January 23, 2012.
December 20, 2011
Construction at the site will resume in January. The project team would like to take this opportunity to wish everyone a Merry Christmas and Happy Holidays.
Best Wishes for a Safe and Happy Holidays.
November 25, 2011
The remainder of the steel for erection being shipped continues to arrive on site. Tybrook, the steel erector has arrived on site and the building skeleton is expected to take shape this month, weather prevailing.
Trusses continue to arrive on site.
First Truss being installed.
Crane lift of second truss.
The facility is taking shape. November 2011
The project team gave the students from the grade four class of the Robert Service School a tour of the site in late October. Students wrote essays on what they learned which will be posted on this website later this month.
October 14, 2011
Concrete work continues at the site and is 98% complete. Structural steel for the building frame is arriving on site. When all the necessary pieces of steel are on site, steel erection will begin. Once started this work is still slated to be complete in four to five weeks after the work begins.
Removed formwork around cast in place October 3, 2011
Newly delivered trusses to site October 6, 2011
Structural steel support columns on site October 6, 2011
Structural steel plates and bolts October 6, 2011
September 20, 2011
Completed concrete pour
September 16, 2011
Concrete work at the site is 95% complete. The last piece of concrete work is the second story floor of the facility and plans are underway to pour this concrete later in the fall.
Structural steel for the building frame is expected on site very shortly. Steel erection is anticipated to be complete in three to four weeks after the steel arrives. Metal wall and roof panels will be fabricated in October and installed afterwards.
Aerial View September 17, 2011
August 19, 2011
Completed concrete work for clarifier tanks August 17, 2011
The concrete work on the building and its foundations continues. The large tanks in the plant are also made of concrete. Concrete pours for the floor slabs on grade and exterior door ramps and landing pads will be continuing into late September. The concrete pours require at least seven days to cure and are approximately 90% complete.
Upcoming work in September will see the structural steel building erected and the metal wall panels installed. Work on the structural steel building will be started in early September and finished in late October, along with the installation of metal panels.
The project team reminds people that visitors are welcome but must call the site office trailer at 993-6241 to arrange a time. Visitors will also be required to follow safe practices at the site.
Site pan August 16, 2011
July 29, 2011
The work on the building foundation continues. This includes building formwork, installing rebar, pouring concrete and stripping formwork once the concrete has hardened. The concrete pours are approximately 60% complete.
Upcoming work in August and September will see the structural steel building erected and the metal wall panels installed.
Visitors are welcome but must check in at the site office trailer by calling 993-6241 to ensure safe practices at the site are followed.
Force main branch valves
July 7, 2011
Foundation work continues
July 8, 2011
Clarifier tank mid-section July 5, 2011
June 15, 2011
Fifth Avenue re-opened June 11, 2011
Dawson’s manhole on Fifth Avenue is installed and the road is once again open to traffic. The dewatering program is finished and the slow flow fountain has ebbed to a close earlier than anticipated. The concrete pours have started and will continue over the next couple of months.
Cement pour on site June 11, 2011
May 31, 2011
Foundation work
around the two excavated shafts.
Work began on schedule this spring and included excavation and installation of the new sewage sump. Form work and rebar in preparation for the concrete building foundation is also underway. The project team is replacing Dawson’s manhole on Fifth Avenue which is why the road is still closed. It is anticipated that the road will re-open sometime in mid-June. The slow flow fountain (now try saying that quickly!) as seen below is being used to dewater the excavation so that work can proceed.
Concrete pours will begin in early June and will continue for about ten weeks. The concrete batch plant is located in the Callison Subdivision and is being run by Pine Tree Services out of Atlin, British Columbia.
The Slow Flow Fountain dewatering excavation
April 6, 2011
The City of Dawson has submitted their application for the Water Licence needed to carry on with the wastewater project. In accordance with the requirements of the Yukon Waters Act, the public hearing was scheduled for March 29 to March 31. However, as of March 21, 2011 the Water Board decided that a formal hearing will not be required.
Construction at the site is slated to resume late April to early May. At this time the excavation work will begin for the installation of the new sewage sump which will be located adjacent to the screening plant. This work will take about two and half weeks to complete.
Dawson City Wastewater Treatment Facility
November 1, 2010
Drilling of both main shafts was completed in the early hours of October 18. Installation of all the components within the shafts was finished on October 26.
Both completed shafts now include:
- a steel aeration vessel
- grout that has been injected between the steel vessels and bedrock
- their internal components.
The internals of the west shaft
The steel vessels have been pressure tested to 150% of their design pressure. No leaks have been detected.
The last task for Construction Drilling Inc. (CDI) will be to attach the steel Downcomer Support Frames (aka "boats") to the tops of the steel shafts. These are semi-circular pieces that connect the steel shafts to the concrete and steel head tanks that will be inside the plant itself.
The former re-circulation pond is now being drained by Grenon’s evacuator truck and the contents are being disposed of at the Dempster turnoff sewage disposal lagoon. Read more about water in the drilling process
Remaining work for 2010 is being decided by Corix Water Systems and their team. CDI has begun removing their equipment and materials from the site. The CDI team has been in Dawson since early June.
B20 inch downcomer being installed
in east shaft
East shaft 38
inch aeration vessel session
September 1, 2010
The east and west casings.
The drill rig is sitting on the west casing
Drilling and grouting of the grout holes that stabilize the bedrock to accommodate the main shafts was completed at the end of July. I beams were driven into the precise shaft location to prepare for the installation of the two 54 inch diameter overburden casings. The overburden casings were then lifted into position and both casings were driven into the ground in an alternating fashion using a vibro-hammer until they were seated 2 metres into bedrock.
The shaft locations are referenced as the east shaft and the west shaft. A collar was installed on the west shaft to accommodate the alignment of the big drill and drilling began at the end of August.
Water from drilling operations entering the re-circulation pond from the steel settling tank
Corix has constructed a 16 metre by 12 metre lined pond as part of the drilling process in order to re-circulate the water required for drilling.
Drilling is going well and will continue into the month of September. Once the work on the west shaft is complete, the drill will be re-assembled on the east shaft and the same procedure will begin again.
A welded 80 foot casing
being lifted
Initial welding of the “vessels” (the large sealed pipe that will go into the shaft holes to contain the sewage while it is treated) has also been completed.
Visitors are welcome but must check in at the site office trailer by calling 993-6241 to ensure safe practices at the site are followed.
June 28, 2010
50 inch drill bit
Construction Drilling Inc. is on site and grouting of the pre-grout holes is underway. Corix requested a waiver on the noise bylaw from Town Council to allow for work to take place around the clock in order to hasten this task and keep the overall project on schedule. Town Council has approved this waiver and the target for completion of this work is slated for sometime in early July.
Drilling of the main shafts is expected to begin in mid July and construction of the facility is still slated for the fall.
Big drill gantry frame
Shaft casing guide
June 1, 2010
The public consultation under the Yukon Environmental and Socio-economic Assessment Act (YESAA) has concluded and the Designated Office has posted the evaluation report and the Decision Document on the Yukon Environmental and Socio-economic Assessment Board (YESAB) Online Registry.
Both the evaluation report and the decision document can be found at:
http://www.yesab.ca/
The next step is to acquire all the necessary permits required to begin drilling the shafts. It is expected that drilling will begin in early June and continue throughout the summer.