Current Happenings and News
September 28 Update -
Work has been slowed tremendously by more, and denser, rock. There is about 5 more feet of material to remove to get to the right depth and it is all pretty solid rock. This is bad news for the project schedule, but will assure that the reservoir has very good seismic stability. Crews will be working on Saturday to complete installation of the erosion control measures before the October 1st deadline.
A design change is in process for the retaining walls. Rather than drilling anchors into the hillside and building a free standing retaining wall, the geotechs have determined that the rock is solid enough that affixing a steel mesh to the face of the excavation and spraying on grout will provide a solution that is just as structurally sound at a lower price for the agency.
Traffic issues have plagued the project this week. In addition to materials delivery and employee vehicles related to the reservoir project, the long delayed installation of a back up generator for the pump station was started. A conversation with the contractor has resulted in a plan to park employee vehicles off the street that should be implemented next week. Delivery of some materials and supplies will still disrupt traffic temporarily on an intermittent basis.
Construction Update -
More rock has been removed and there's about 11 more feet of digging left to go. Since the hole is getting so deep, it has reached the point where the construction of retaining walls will be necessary. Installation of the anchors for the walls was started on September 21st and will pick up again on Monday the 24th. No weekend work has been slated for this week.
Work progress has slowed dramatically as all of the easy-to-dig soil has been removed and the contractors started into the rocky layers. So far, hydraulic breakers have not been necessary to this point, as the contractors have been able to rip the rocks out with standard excavators, although not without some additional effort and noise. The hope is that similar conditions will remain as they excavate the final 10-12 feet. The amount of material removed from the site is now over 44,000 cubic yards.
The race is on to finish the excavation and try to get the floor poured before the rainy season begins. The contractor will also begin preparing the site for the oncoming rainy season by increasing erosion control practices on site, such as plastic sheeting on steep slopes, diversion dams around the top perimeter of the excavated area, and other measures.
Weekly Plan -
For week of August 13 - 17
Hauling on 147th Walking path is concluded.
Complete the common excavation (i.e.dirt)
Begin rock excavation - The reports are that the rock should be friable enough to rip out with the excavator. If this does not prove to be the case then hydraulic breakers may be required,
Project Update -
Just under 34,000 cubic yards of material has been removed from the site and is stockpiled at the Sunrise property on 172nd and Armstrong Circle.
It took an average of 52 seconds to load each dump truck.
A non-injury safety incident occurred at the job site on August 9th. A spare on-site truck was being used to haul asphalt debris as the crews cleaned up the 147th walking path after the excavators moved down into the hole. In what appears to be a mechanical malfunction with the emergency brake, the truck rolled down the hill and went through the temporary fencing and into a home's yard. Fortunately no one was hurt. The contractor closed the site to normal work today while a complete safety incident investigation is conducted. That truck has been removed from the job site.
Last bit of digging from on top.
A perspective of how large the hole is getting.
Weekly Plan -
For the week of July 30 - August 3
Soil removal will slow a little as excavation shifts to establishing the lower haul road and construction access.
A job shack for crew will be brought on site.
A fire hydrant at the site will be removed.
As of July 27, over 20,000 yards of soil has been excavated from the reservoir site.
Weekly Plan -
Expected Work for Week of July 16-20
Update on work completed -
To date more than 7,500 cubic yards of dirt has been removed from the site.
The construction entrance and erosion control measures have been installed at the stockpile site on 172nd Avenue and Armstrong Circle.
Due to the depth of the excavation, the contractor will be removing soil from the top of the site using old 147th as access for a period.
Expected work for the week of June 18-22
- Construction signage installed
- Small equipment mobilized to site
- Erosion control and tree protection to be installed
- Removal of concrete island on Verlie
- Potential for some large equipment mobilization at end of week
- Potential for tree removal late in the week
Weekly Plan -
Week 1 of construction started off with pre-construction site preparation.
Week of June 11-15
- Notice to Proceed issued
- Construction hours signage installed
- Video documentation of haul road
- Security fence and screening installed
- 147th walking path closed
- Some light equipment staging (Portable restroom, erosion control materials, etc.)
Meet the Construction Manager - Dan Fraijo
Dan joined Sunrise Water Authority in 2010 as the Field Operations Manager with a solid history of buried infrastructure behind him. As we have shifted gears from maintenance only into construction of projects,Dan has transitioned into the role of Construction Manager. During the course of the project, Dan will spend the majority of his time at the construction site assuring that the contractor is performing to our expectations.
Mark Your Calendars!
We are cleared for take-off! Construction starts June 11.
The first couple of weeks will be dedicated to mobilization and site preparation, such as erecting security fencing and sign placement.