Friday - June 20, 2014

Water Treatment Plant Construction Update

Aerial view of the site. Center: Ballasted flocculation structure and conduit for chemical building. Right: 54” pipe connection to the clearwell and conduit for the electrical building.

Concrete work continues to progress for new structures across the site, including the ballasted flocculation, clearwell, mechanical dewatering building and solids storage tank. Refer to the current site plan for locations of each structure. This week, the first leak test for the new gravity thickener building began and crews encased the 54” pipe connecting the new clearwell and filters in concrete.

Next week, backfilling the 54” pipe with gravel will begin. This is expected to take about a week to complete. Neighbors close the site on Mapleton Drive may experience intermittent vibration during this work.

Over the next few weeks, work will continue on the clearwell and ballasted flocculation roof slabs which are poured in a checkerboard pattern. The next large pour is scheduled for late next week. Waterblasting with a pressure washer or sandblasting of the edges of the newly poured slabs will occur one or two days after the pour. Neighbors close to the site on Mapleton Drive and Kenthorpe Way may experience intermittent noise during this work. Truck traffic will continue during concrete pouring for new structures.

Later this month, crews will excavate and install the slide rail shoring system for the new 48” overflow pipe near the chemical building. This is the same shoring system that was used on-site last week for the 54” pipe (not sheet piling that was used earlier this year). Once this is complete, auger cast piles will be drilled to support the pipe.

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. There will be no work on Friday, July 4th or Saturday, July 5th.

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.

For more information, please contact us. 

Upcoming Activities*Purpose of WorkPotential ImpactsEstimated Duration

Week of June 23 - 28

1 Continue concrete pouring for clearwell and ballasted flocculation Provide upper covering for the structures and foundation support No anticipated new noise. Trucks entering/exiting with equipment, formwork. Some intermittent noise from waterblasting or sandblasting concrete – south (Mapleton) and center of site. 3 weeks
2 Continue shoring roof support for solids storage tank and pouring concrete Provide support for forming roof and upper covering for structure No anticipated new noise, concrete pouring concrete trucks entering/exiting with equipment – center & northeast of site. 3 weeks
3 Continue water/leak testing the gravity thickener structure Cleans and tests new structure No anticipated new noise. Trucks entering/exiting and concrete poured – northeast of site. 2 weeks
4 Begin backfilling 54” pipe Refills excavated area Potential vibration during backfilling as compactor compresses fill – center of site. 1 week
5 Continue installing electrical conduit, rebar and piping; forming columns, walls and slabs for electrical building and chemical building, some concrete pouring required. Provide electrical wiring for structure & foundation to support structure No anticipated new noise. Trucks entering/exiting with equipment. Concrete pouring, concrete trucks entering/exiting center of site. 3 weeks
6 Continue forming walls for mechanical dewatering structure Provide foundation to support the mechanical dewatering building No new noise anticipated. Concrete pouring, concrete trucks entering/exiting, intermittent noise from waterblasting or sandblasting concrete – northeast of site. 2 weeks
7 Begin excavating, installing shoring support for 48” overflow pipe, and installing auger cast piles Refills excavated area, and prepares for piping installation. Piles support the pipe. Some noise and vibration as compactor compresses fill, excavator digs and drill rig moves across center of site. 2 weeks

Week of June 30 - July 3

1 Continue activities from 1- 2 and 5 - 7 above.
2 Begin applying water proof coatings on gravity thickener Water proofs the walls of the structure Some noise from pressure washer on east side of site, but less noisy than sandblasting. 1 week

*Please note, activity duration and schedules may change