Friday - March 28, 2014

Water Treatment Plant Construction Update

The second tower crane is now assembled

The second tower crane is now assembled

This week was an active one on the site with the second tower crane being assembled. The tower crane will provide efficient, quiet and fume-free servicing of new structures on the west of the site as compared to a diesel crane.

Over the next few weeks, work will continue on forming and pouring concrete for the columns and suspended roof for the clearwell and ballasted flocculation walls. The auger cast drill rig will also continue to install piles for new structures on the northeast and center of the site. Next week, the compactor will be working to backfill the southern side of the access road and ramp to the clearwell, on the south side of the site near Mapleton Drive.

Neighbors can expect some noise and potential vibration during the fill placement and compaction, auger cast drilling and concrete sandblasting, depending on locations or personal sensitivities. Truck traffic will continue during concrete and grout pouring for the auger cast piles and new foundations.

Work hours are Monday to Friday from 7:00 a.m. to 7:00 p.m. and Saturdays, from 9:00 a.m. to 5:00 p.m.

For more detail about what activities are happening on site please see the table below.

We apologize for the inconvenience construction may cause and thank you for your patience as work progresses.

Upcoming Activities*Purpose of WorkPotential ImpactsEstimated Duration

Week of March 31-April 5

1 Continue forming walls, columns and shoring support for clearwell, including concrete pouring Provide foundation to support the clearwell & temporary support for forming clearwell roof Concrete pouring, concrete trucks entering/exiting, intermittent noise from sand blasting concrete – south of site. Trucks entering/exiting with equipment, formwork. 4 weeks
2 Begin backfilling and compacting the south side access and ramp into clearwell Refill excavated area after concrete placement  Noise and possible vibration as compactor compresses fill and gravel - south of the site, near Mapleton Drive. 2 weeks
3 Continue forming walls for ballasted flocculation building, including concrete pouring Provide foundation to support the ballasted flocculation building Concrete pouring, concrete trucks entering/exiting, intermittent noise from sand blasting concrete – center of site 2 weeks
4 Begin forming and placing concrete base slabs for solids storage tank Provide foundation to support the solids storage tank Concrete pouring, concrete trucks entering/exiting, intermittent noise from sand blasting concrete – northeast of site 3 weeks
5 Continue installing auger cast piles for chemical building and mechanical dewatering Piles will support the base of the structures Noise, possible vibration as drill moves across the northeast of site 2 weeks
6 Begin installing underslab plumbing and electrical for chemical building Provide plumbing and electrical wiring for structure Trucks entering/exiting with equipment. No anticipated new noise. 2 weeks

Week of April 7-12

1 Continue forming walls, columns and shoring support for clearwell (see 1 above)
2 Continue backfilling and compacting south side of clearwell (see 2 above)
3 Continue forming walls for ballasted flocculation building (see 3 above)
4 Continue forming the base slabs for solids storage tank (see 4 above)
5 Continue installing auger cast piles for mechanical dewatering (see 5 above)
6 Continue installing underslab plumbing and electrical wiring for chemical building (see 6 above)
6 Begin installing conduit tubing/piping for solids storage area Conduit will be used for electrical wiring Trucks entering/exiting with equipment. No anticipated new noise. 1 week

*Please note, activity duration and schedules may change