Thunderstorm Impacts on Wastewater System Operations · Thunderstorm Impacts on Wastewater System Operations July 17, 2019. 3 Thunderstorms • Thunderstorms frequently occur in the

Massachusetts Water Resources Authority

Thunderstorm Impacts on Wastewater System Operations

July 17, 2019

3

Thunderstorms

• Thunderstorms frequently occur in the afternoon and early evening during the late Spring and Summer months and their intensity and track are hard to predict

4

Thunderstorm Staffing Preparations

Precautionary staffing necessary due to the unpredictable nature of thunderstorms

• Operations staff required at:

⁻ 3 CSO Treatment Facilities (Prison Point, Cottage Farm and Somerville Marginal)

⁻ 3 Northern Headworks (Chelsea Creek, Ward Street and Columbus Park)

⁻ 2 roving crews to respond to operational issues

• Maintenance staff stationed to address equipment issues in a timely manner at:

⁻ Chelsea Maintenance Facility, Chelsea Creek, Ward Street and Prison Point

5

Severe Weather Outlook for June 29, 2019

National Weather Service Forecast:• Thunderstorms and showers• Chance of rain 60%

6

Severe Thunderstorm Warning for Boston for Saturday June 29, 2019

7

Rainfall Totals for June 29, 20190.38”

0.79”

0.74”

0.66”

1.82”

JUNE 29th THUNDERSTORM

Measured Area Rainfall:

Hayes PS: 0.38 inchesColumbus Pk HW: 0.66 inchesWard Street HW: 0.74 inches Hanscom: 0.79 inchesChelsea Creek HW: 1.82 inches

v Chelsea Admin Building Rain Gauge registered an instantaneous rainfall rateof 12.26 in/hr at 4:30 pm

8

Severe Weather Outlook for Sunday, June 30, 2019

National Weather Service Forecast:• Thunderstorms and showers• Chance of rain 80%

9

Severe Thunderstorm Warning for Sunday, June 30, 2019

10

Rainfall Totals for Sunday, June 30, 2019

0.42”

0.16”

0.08”0.38”

0.19”

JUNE 30th THUNDERSTORM

Measured Area Rainfall:

Hayes PS: 0.42 inchesColumbus Pk HW: 0.38 inchesWard Street HW: 0.08 inches Hanscom: 0.16 inchesChelsea Creek HW: 0.19 inches

11

Rainfall Totals From June 29th to July 1st

12

Chelsea Creek Headworks Flow

0

0.2

0.4

0.6

0.8

1

1.2

1.4

0

50

100

150

200

250

3001

2:15

:00

AM

1:3

0:00

AM

2:4

5:00

AM

4:0

0:00

AM

5:1

5:00

AM

6:3

0:00

AM

7:4

5:00

AM

9:0

0:00

AM

10:

15:0

0 A

M

11:

30:0

0 A

M

12:

45:0

0 P

M

2:0

0:00

PM

3:1

5:00

PM

4:3

0:00

PM

5:4

5:00

PM

7:0

0:00

PM

8:1

5:00

PM

9:3

0:00

PM

10:

45:0

0 P

M

12:

00:0

0 A

M

1:1

5:00

AM

2:3

0:00

AM

3:4

5:00

AM

5:0

0:00

AM

6:1

5:00

AM

7:3

0:00

AM

8:4

5:00

AM

10:

00:0

0 A

M

11:

15:0

0 A

M

12:

30:0

0 P

M

1:4

5:00

PM

3:0

0:00

PM

4:1

5:00

PM

5:3

0:00

PM

6:4

5:00

PM

8:0

0:00

PM

9:1

5:00

PM

10:

30:0

0 P

M

11:

45:0

0 P

M

RAIN

FALL

(IN

CHES

/15

MIN

)

FLO

W (M

GD

)CHELSEA CREEK HEADWORKS FLOWS

JUNE 29-30 2019

Chelsea Creek HW Rainfall Chelsea Creek HW Total Flow

1.6

0.19 0.14 in.

13

Ward Street Headworks Flow

0

50

100

150

200

250

300

12:1

5:00

AM

1:30

:00

AM

2:45

:00

AM

4:00

:00

AM

5:15

:00

AM

6:30

:00

AM

7:45

:00

AM

9:00

:00

AM

10:1

5:00

AM

11:3

0:00

AM

12:4

5:00

PM

2:00

:00

PM

3:15

:00

PM

4:30

:00

PM

5:45

:00

PM

7:00

:00

PM

8:15

:00

PM

9:30

:00

PM

10:4

5:00

PM

12:0

0:00

AM

1:15

:00

AM

2:30

:00

AM

3:45

:00

AM

5:00

:00

AM

6:15

:00

AM

7:30

:00

AM

8:45

:00

AM

10:0

0:00

AM

11:1

5:00

AM

12:3

0:00

PM

1:45

:00

PM

3:00

:00

PM

4:15

:00

PM

5:30

:00

PM

6:45

:00

PM

8:00

:00

PM

9:15

:00

PM

10:3

0:00

PM

11:4

5:00

PM

0

0.2

0.4

0.6

0.8

1

1.2

1.4

FLO

W (M

GD

)

RAIN

FALL

(IN

CHES

/15

MIN

)

WARD STREET HEADWORKS FLOWJUNE 29-30 2019

Ward Street HW Rainfall Ward Street HW Total Flow

14

Prison Point CSO Inlet Elevation

0

0.2

0.4

0.6

0.8

1

1.2

1.4

80

85

90

95

100

105

110

12:

15:0

0 A

M

1:1

5:00

AM

2:1

5:00

AM

3:1

5:00

AM

4:1

5:00

AM

5:1

5:00

AM

6:1

5:00

AM

7:1

5:00

AM

8:1

5:00

AM

9:1

5:00

AM

10:

15:0

0 A

M

11:

15:0

0 A

M

12:

15:0

0 P

M

1:1

5:00

PM

2:1

5:00

PM

3:1

5:00

PM

4:1

5:00

PM

5:1

5:00

PM

6:1

5:00

PM

7:1

5:00

PM

8:1

5:00

PM

9:1

5:00

PM

10:

15:0

0 P

M

11:

15:0

0 P

M

12:

15:0

0 A

M

1:1

5:00

AM

2:1

5:00

AM

3:1

5:00

AM

4:1

5:00

AM

5:1

5:00

AM

6:1

5:00

AM

7:1

5:00

AM

8:1

5:00

AM

9:1

5:00

AM

10:

15:0

0 A

M

11:

15:0

0 A

M

12:

15:0

0 P

M

1:1

5:00

PM

2:1

5:00

PM

3:1

5:00

PM

4:1

5:00

PM

5:1

5:00

PM

6:1

5:00

PM

7:1

5:00

PM

8:1

5:00

PM

9:1

5:00

PM

10:

15:0

0 P

M

11:

15:0

0 P

M

RA

INFA

LL (

INC

HE

S/1

5 M

IN)

LEV

EL

(FE

ET

MD

C)

PRISON POINT CSO INLET LEVEL

JUNE 29-30 2019

Chelsea Creek HW Rainfall Prison Point Inlet Structure Level

0.14

in.

1.67

in.

0.19

in.

15

Somerville Marginal CSO Inlet Elevation

0

0.2

0.4

0.6

0.8

1

1.2

1.4

101

102

103

104

105

106

107

108

109

110

111

12:

15:0

0 A

M

1:1

5:00

AM

2:1

5:00

AM

3:1

5:00

AM

4:1

5:00

AM

5:1

5:00

AM

6:1

5:00

AM

7:1

5:00

AM

8:1

5:00

AM

9:1

5:00

AM

10:

15:0

0 A

M

11:

15:0

0 A

M

12:

15:0

0 P

M

1:1

5:00

PM

2:1

5:00

PM

3:1

5:00

PM

4:1

5:00

PM

5:1

5:00

PM

6:1

5:00

PM

7:1

5:00

PM

8:1

5:00

PM

9:1

5:00

PM

10:

15:0

0 P

M

11:

15:0

0 P

M

12:

15:0

0 A

M

1:1

5:00

AM

2:1

5:00

AM

3:1

5:00

AM

4:1

5:00

AM

5:1

5:00

AM

6:1

5:00

AM

7:1

5:00

AM

8:1

5:00

AM

9:1

5:00

AM

10:

15:0

0 A

M

11:

15:0

0 A

M

12:

15:0

0 P

M

1:1

5:00

PM

2:1

5:00

PM

3:1

5:00

PM

4:1

5:00

PM

5:1

5:00

PM

6:1

5:00

PM

7:1

5:00

PM

8:1

5:00

PM

9:1

5:00

PM

10:

15:0

0 P

M

11:

15:0

0 P

M

RA

INFA

LL (

INC

HE

S/1

5 M

IN)

LEV

EL

(FE

ET

MD

C)

SOMERVILLE MARGINAL CSO INLET LEVEL

JUNE 29-30 2019

Somerville Remote Rain Gauge Somerville Marginal Inlet Level

0.97

0.39 0.16

in.

17


Deer Island Treatment PlantMaintenance Coating Contract

July 17, 2019

• Painting/coating/concrete and steel repairs in several areas of the Deer Island Treatment Plant:

– Primary Scum Building Scum Wells (8 Total)– Odor Control Facilities Carbon Adsorbers (6 Total)– Module 3 Digester Overflow Boxes (4 Total)

20

Contract S583 Scope of Services Summary

21

Contract S583 Scum Well Scope

Mixer

Mixer

Scum Well Below

• 4 Primary Batteries each with 2 Scum Wells for a total of 8 Scum Wells

22

S583 Odor Control Facility Carbon Adsorber Scope

• East and West Odor Control Facility - 5 Carbon Adsorbers• Residuals Odor Control Facility - 1 Carbon Adsorber

6 Total

S583 Module 3 Digester Overflow Box Scope

Four (4) Overflow Boxes Total

Advertised and bid in accordance with Chapter 149 of the Massachusetts General laws. Bids were opened June 11, 2019:

Atlas Painting And Sheeting Co. $2,020,000*Engineer’s Estimate $2,275,000Soep Painting Corporation $2,495,000John W. Egan Co. Inc. $3,508,990* Atlas bid was deemed non-responsive as it did not include the DCAMM Update Statement

Based on the bid evaluation, Soep Painting Corporation was found to be the lowest responsible and eligible bidder

24

Contract S583 Procurement Summary


Piping Relocation at the Pelletizing Plant

July 17, 2019

MWRA Pellet Plant

27

• Process liquid digested sludge from Deer Island – 105 dry tons sludge daily

• Markets and distributes 31,000 tons pellets annually

• On-site storage for 5,000 tons of dried pellets

• Five adjacent silos

• Four remote silos connected by pipe conveyance system

MWRA Pellet Plant Layout

28

Remote Silos

Adjacent Silos

Building 11

Sludge Receiving Tanks

Building 11 Pellet Piping Transfer Lines

29

Adjacent Silos

Building 11

Transfer Lines

Remote Silos

Transfer Lines

Partial roof collapse

Building 11 Demolition – September 2018

30

Post Demolition – Building 11

31

New Transfer Line Route

• Loss of access to remote silos reduces on-site storage by 45%

• Board approved Amendment 2 to NEFCO Contract for increased expenses-January 2019

• This Contract will install a new pellet conveyance piping system on dedicated supports

Contract 7173

32

• Bids Received:

1. Walsh Construction Co. II, LLC $4,250,445.002. William M. Collins Co., Inc. $5,658,061.003. IPC Lydon, LLC $6,187,762.004. Engineer’s Estimate $3,200,000.00

• Contractor: Walsh Construction Co. II, LLC (lowest responsive bidder)

• Contract Duration: 450 days


Bellevue 2 and Turkey Hill Steel Tank Painting

July 17, 2019

35

Bellevue 2 and Turkey Hill Water Tank Painting

Turkey HillArlington

Bellvue 2, West Roxbury

Chelsea

36

Turkey Hill Foundation Repair Contract Repair Limits

water tank

foundation

3” depth of concrete removal

20”

36”

37

Demolition of Deteriorated Concrete on Foundation

20”

36”

Water tank

Steel rebar

38

“Test” section to determine extent of demo required

20”

36”

Original concrete

Repair mortar

Steel rebar

Wire mesh reinf.

Water tank

39

Foundation Core Samples

Originalconcrete

Repair mortar coating

Six concrete core samples taken2 ¾” diameter, up to 8” depth

40

Final Foundation Repair Detail

Water tank

6” depth

4” depth

41

Bellevue 2 “Robot” Paint Removal

November 2018

Vacuum hose

Original coating

Robot paint remover

42

Bellevue 2 Interior surface

October 2018March 2019

Failure of previous coating

Operating water level

43

Bellevue 2 Ceiling Final Coating Complete

March 2019

44

Bellevue 2 Before and After

September 2018

April 2019

45

Bellevue 2 MWRA Drone View

46

Bellevue 1 and 2

47

Turkey Hill Tank Antennas, February 2019

Arlington FDArlington PDArmstrong AmbulanceLifeline AmbulanceMassDOTMass State PoliceVerizonT-MobileSprintCingularAT&TFederal AgencyMWRA

48

Turkey Hill Water Tank “Robot” Paint Removal

Robot paint remover

Primer coating

Bare Steel

Original Coating

49

Turkey Hill Exterior Finish Coating Complete

June 2019

50

Turkey Hill Water Tank Interior Ceiling and Wall at Finish Coating

Documents

Thunderstorm Impacts on Wastewater System Operations · Thunderstorm Impacts on Wastewater System Operations July 17, 2019. 3 Thunderstorms • Thunderstorms frequently occur in the