Massachusetts Water Resources Authority

Spot Pond tank and pump station

January, 2015

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Outline

•  Area  Served  by  Project  •  Need  for  Project  •  Project  approach:    Design  /  build.  •  Project  features  •  Construc@on  photos  •  Opera@onal  Challenges  

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Area Served by Project

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Need for Project: Gillis Pump station redundancy

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Need for Project: Low Service System

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Need for Project: No Storage in “Northern Low”

Shaft W

Loring Road Tanks 20 MG Nonantum Rd

Shaft 7B

Shaft 8

Shaft 9

Shaft 9A

Charles R.

Mystic R.

Malden R.

Chelsea Cr.

Spot Pond

Chestnut Hill

‘Northern Low’

‘Boston Low’

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Two Problems. One project.

•  Spot  Pond  Water  Storage  Facility  

•  Design/build  project  awarded  to  Walsh  Construc@on  Company  in  November  2011  

•  Project  consists  of    –  20  MG  storage  tank  in  two  separate  cells    –  Pump  sta@on  for  NIH  and  NH  service  area  

•  Construc@on  underway  

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Plan: Ravine Road

New England Regional Hospital

To Gillis P.S. and Spot Pond

To Fells Covered Storage

Tank 1 Tank 2

Pump Station

Low Service connection (suction)

High and Intermediate High service connections (discharge)

Detention Basin

Overflow pipe

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Rendering:

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Rendering:

Site Prior to Construction, October, 2010

Site Prior to Construction, October, 2010

Blasting Operation, Oct, 2012

Pump Station Suction Piping, June, 2013

Pump Station Slab, July, 2013

Miles of Steel Rebar, July, 2013

Rock Crushing and Material Sorting, Sept, 2013

Steel and Concrete for Roof Slab, Sept, 2013

Clearing Pipeline Road for New Pipe Installation, Sept, 2013

Concrete Slab Placement, Oct, 2013

Starting to Take Shape, Oct, 2013

Tons of Steel to Tie

Interior Baffle Walls, Oct, 2103

Staging to Support Roof Slab Installation, Oct, 2013

Staging to Support Roof Slab, Oct, 2013

Tank Overflow pipe Installation, March 2014

Jacking Pit with Soil Being Removed, March, 2014

Last Section of jacked pipe, March, 2014

Mobile Pumps Behind Gillis Pump Station, March, 2014

Standby Pump If Needed, March, 2014

Discharge Connection to Section 89, March, 2104

Overflow Pipe completion, May, 2014

Tank 2 Interior, May, 2014

Pump Station Piping, July, 2014

Switch gear, July 2014

Low Service Tie-in, Ravine Road, September, 2014

Duct bank installation in pipeline road, September, 2014

Pump Station, September, 2014

Landscaping underway, September, 2014

Slope Protection, Oct, 2014

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Northern High/Northern Intermediate High Pumping

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Operational Challenges

9.1 MGD

6 MG

20 MG

20 MG

2.6 MGD

4.2 MGD

11.7 MGD

4.2 MGD

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Low Service System

Shaft W

Loring Road Tanks 20 MG Nonantum Rd

Shaft 7B

Shaft 8

Shaft 9

Shaft 9A

Charles R.

Mystic R.

Malden R.

Chelsea Cr.

Spot Pond

Chestnut Hill

‘Northern Low’

‘Boston Low’