33 40 00 - Temporary Flow Diversion and Bypass Pumping.pdf

Rouge Valley Sewage

Disposal System Temporary Flow Diversion and Bypass Pumping

June 10, 2024 Page 1 Phase 2C/3C - Pipe Rehabilitation

SRF Project #5858

33 40 00 - TEMPORARY FLOW DIVERSION AND BYPASS PUMPING

PART 1 – GENERAL

1.1 SUMMARY

A. This section includes specifications for flow control through temporary flow diversion and bypass pumping to support the Work being performed as part of the Rouge Valley Sewage Disposal System (RVSDS) State Revolving Fund (SRF) Project Plan: Phase 2C/3C - Pipe Rehabilitation.

B. Interceptor Abbreviations

1. DHLI – Dearborn Heights Local Improvements

2. MRIR – Middle Rouge Interceptor Relief

3. MRPIE – Middle Rouge Parkway Interceptor Extension

4. PWI – Parkway Interceptor

5. RVI – Rouge Valley Interceptor

6. WI – Wayne Interceptor

C. This Work consists of:

1. Cleaning and grouting repairs to various pipe segments throughout the

RVSDS.

2. The installation of fiberglass reinforced pipe (FRP) to serve as a pipe liner in the following reaches.

a. RVI

- Area A: 66-inch diameter from Manhole “RVI 6-30” to “RVI 6-39”

- Area B: 78-inch diameter from Manhole “RVI 6-12” to “RVI 6-23”

b. MRIR

- Area A: 54-inch diameter from Manhole “NHV 3-01” to “NHV 3-16”

- Area B: 66-inch diameter from Manhole “NHV 2-21” to “NHV 2-33”

c. MRPIE

- Area B: 60-inch diameter from Manhole “MR I-11” to “MR I-17”

3. Targeted sewer rehabilitation through bends at six Rehab Locations.

D. The Work is in active sanitary sewers with continuous flows. Conveyance of flow in the RVSDS must not be interrupted by the Work. Therefore, if execution of the work cannot be performed in the depths and velocities of typical dry weather flow, then flow diversion or bypass pumping is required to reduce or eliminate the flow in the pipe segment being worked on.

June 10, 2024 Page 2 Phase 2C/3C - Pipe Rehabilitation

E. Where the Work is occurring in one of multiple RVSDS interceptors that flow in parallel with each other, the flow in dry weather may be diverted by gravity into the other interceptors by installing sewer plugs at common junction chambers. Thirty-one diversion setups were identified for their application to the Work and are described below. These diversions are presented for each pertinent pipe segment in Table 1 with the normal dry weather flow rate and the reduced flow rate if diversion is implemented.

Additionally, if work is occurring at the junction chamber itself, a flume may be used to isolate the junction chamber while still passing dry weather flow. Figure 1 below presents an example of such a flume concept.

Figure 1. Example Flume Concept

Diversion Setup No. 1

Manhole “RVI 15-18B (JC16)”

- Install a plug on the outgoing 48” diameter RVI, Sewer “RVI 15-18B

(JC16)-18”

o All incoming flow will be diverted to the outgoing 36” diameter WI, Sewer “RVI 15-18B (JC16)-25”

June 10, 2024 Page 3 Phase 2C/3C - Pipe Rehabilitation

Diversion Setup No. 2

Manhole “NHV 5C-16”

- Install a plug on the outgoing 36” diameter MRIR, Sewer “NHV 5C-16-15” o All incoming flow will be diverted to the outgoing 30” diameter PWI, Sewer “NHV 5C-16-10”

Diversion Setup No. 3

Manhole “NHV 5C-16”

- Install a plug on the outgoing 30” diameter PWI, Sewer “NHV 5C-16-10” o All incoming flow will be diverted to the outgoing 36” diameter MRIR, Sewer “NHV 5C-16-15”

Diversion Setup No. 4

Manhole “NHV 5C-04”

- Install a plug on the outgoing 36” diameter MRIR, Sewer “NHV 5C-04-03” o All incoming flow will be diverted to the outgoing 30” diameter PWI, Sewer “NHV 5C-04-01”

Diversion Setup No. 5

Manhole “MR III-23B”

- Install a plug on the outgoing 60” diameter RVI, Sewer “MR III-23C-23B” o Incoming flow is split between the 30” diameter MRIR and the 42” diameter MRPIE, Sewers “NHV 4A-34-0006” and “MR III-23-22”, respectively

Manhole “RVI 8-19”

- Install a plug on the 18” diameter City of Westland sewer interconnecting the MRIR and RVI, Sewer “NHV 4A-23-19”

- Install a plug on the 18” diameter City of Westland sewer interconnecting the RVI and MRPIE, Sewer “RVI 8-19A-19”

Diversion Setup No. 6

Manhole “MR III-23”

- Install a plug on the outgoing 42” diameter MRPIE, Sewer “MR III-23-22” o Incoming flow is split between the 30” diameter MRIR and the 60” diameter RVI, Sewers “NHV 4A-34-0006” and “MR III-23C-23B”, respectively

Manhole “RVI 8-19”

- Install a plug on the 18” diameter City of Westland sewer interconnecting the RVI and MRPIE, Sewer “RVI 8-19A-19”

Diversion Setup No. 7

Manhole “NHV 4A-34”

- Install a plug on the outgoing 30” diameter MRIR, Sewer “NHV 4A-34-

0006” o Incoming flow is split between the 42” diameter MRPIE and the 60” diameter RVI, Sewers “MR III-23-22” and “MR III-23C-23B”, respectively

June 10, 2024 Page 4 Phase 2C/3C - Pipe Rehabilitation

Manhole “RVI 8-19”

- Install a plug on the 18” diameter City of Westland sewer interconnecting the RVI and MRIR, Sewer “NHV 4A-23-19”

Diversion Setup No. 8

Manhole “NHV 4A-16C”

- Install a plug on the outgoing 48” diameter MRPIE, Sewer “NHV 4A-16C-

12” o Incoming flow is split between the 24” diameter MRIR and the 60” diameter RVI, Sewers “NHV 4A-16A-16” and “NHV 4A-16B-0005”, respectively

Diversion Setup No. 9

Manhole “NHV 4A-16A”

- Install a plug on the outgoing 24” diameter MRIR, Sewer “NHV 4A-16A-

16” o Incoming flow is split between the 48” diameter MRPIE and the 60” diameter RVI, Sewers “NHV 4A-16C-12” and “NHV 4A-16B-0005”, respectively

Diversion Setup No. 10

Manhole “MR III-02”

- Install a plug on the outgoing 48” diameter MRPIE, Sewer “MR III-02-01” o Incoming flow is split between the 27” diameter MRIR and the 60” diameter RVI, Sewers “NHV 4A-3A-02 and “NHV 6-57-56”, respectively

Diversion Setup No. 11

Manhole “NHV 6-57”

- Install a plug on the outgoing 60” diameter RVI, Sewer “NHV 6-57-56” o Incoming flow is split between the 27” diameter MRIR and the 48” diameter MRPIE, Sewers “NHV 4A-3A-02 and “MR III-02-01”, respectively

Manhole “NHV 3-37W”

- Install a plug on the outgoing 60” diameter RVI, Sewer “RVI 12-01-54” o All incoming flow is diverted to the outgoing 42” diameter MRIR, Sewer

“NHV 3-37-36”

Diversion Setup No. 12

Manhole “NHV 3-37W”

- Install a plug on the outgoing 42” diameter MRIR, Sewer “NHV 3-37-36” o All incoming flow is diverted to the outgoing 66” diameter RVI, Sewer

“RVI 12-01-54”

Diversion Setup No. 12A

Manhole “NHV 3-37W”

- Install a plug on the outgoing 42” diameter MRIR, Sewer “NHV 3-37-36” o All incoming flow is diverted to the outgoing 66” diameter RVI, Sewer

“RVI 12-01-54”

June 10, 2024 Page 5 Phase 2C/3C - Pipe Rehabilitation

Manhole “NHV 3-21”

- Install a minimum 30” wide flume to convey the 66” diameter RVI through the structure

Diversion Setup No. 13

Manhole “RVI 6-42A”

- Install a plug on the outgoing 54” diameter MRIR, Sewer “NHV 3-X-20” o All incoming flow is diverted to the outgoing 66” diameter RVI, Sewer

“RVI 6-42-41”

Diversion Setup No. 14

Manhole “SA06SE017”

- Install a plug on the outgoing 54” diameter DHLI, GID Gravity Main Facility

ID “SA06SE017-SA06SE002”

o All incoming flow is diverted to the 30” diameter Red Run Drain, Sewer

“SA06SW106-SA06SW103”

o Requires permission from the City of Dearborn Heights

Diversion Setup No. 15

Manhole “SA06SE017”

- Install a plug on the outgoing 54” diameter DHLI, GID Gravity Main Facility

ID “SA06SE017-SA06SE002”

o Requires permission from the City of Dearborn Heights o All flow will divert to the 24”-30” diameter Bill’s Drain, Manhole “INK-

30”

Manhole “SA06SE043”

- Install a plug on the outgoing 30” diameter Red Run Drain, Sewer

“SA06SE043-SA06SE042”

o Requires permission from the City of Dearborn Heights o All flow will divert to the 24”-30” diameter Bill’s Drain, Manhole “INK-

30”

Manhole “MR III-02”

- Install a plug on the outgoing 48” diameter MRPIE, Sewer “MR III-02-01” o Incoming flow is split between the 27” diameter MRIR and the 60” diameter RVI, Sewers “NHV 4A-3A-02” and “NHV 6-57-56”, respectively

Manhole “NHV 3-16”

- Install a plug on the 42” diameter MRIR interconnection pipe, Sewer “NHV

3-38-16” o All incoming flow is diverted to the outgoing 54” diameter MRIR, Sewer

“NHV 3-16-15”

Diversion Setup No. 16

Manhole “NHV 3-38”

- Install a plug on the 42” diameter MRIR interconnection sewer, Sewer

“NHV 3-38-16”

o All incoming flow is diverted to the outgoing 48” diameter MRPIE, Sewer “NHV-3-38-9”

June 10, 2024 Page 6 Phase 2C/3C - Pipe Rehabilitation

Manhole “RVI 6-42A”

- Install a plug on the outgoing 54” diameter MRIR, Sewer “NHV 3-X-X” o All incoming flow is diverted to the outgoing 66” diameter RVI, Sewer

“RVI 6-42-41”

Diversion Setup No. 17

Manhole “NHV 3-13”

- Install a plug on the outgoing 66” diameter RVI, Sewer “NHV 3-13-37 o All incoming flow is diverted to the outgoing 54” diameter MRIR, Sewer

“NHV 3-13-12”

Diversion Setup No. 18

Manhole “NHV 3-13”

- Install a plug on the outgoing 66” diameter RVI, Sewer “NHV 3-13-37 o All incoming flow is diverted to the outgoing 54” diameter MRIR, Sewer

“NHV 3-13-12”

Manhole “RVI 6-27”

- Install a plug on the 48” diameter RVI interconnection sewer, Sewer “RVI-

6-27-18A” o All incoming flow is diverted to the outgoing 60” diameter MRPIE, Sewer “MRI-18A-18”

Diversion Setup No. 19

Manhole “MRI-18”

- Install a plug on the outgoing 60” diameter MRPIE, Sewer “MRI-18-36” o All incoming flow is diverted to the outgoing 78” diameter RVI, Sewer

“RVI 6-26-25”

Manhole “NHV 2-36”

- Install a minimum 30” wide flume to convey the 66” diameter MRIR through the structure.

Diversion Setup No. 20

Manhole “NHV 2-38”

- Install a plug on the outgoing 66” diameter MRIR, Sewer “NHV 2-38-37” o All incoming flow is diverted to the outgoing 54” diameter MRPIE, Sewer “MR IV-02-01”

Manhole “NHV 2-36”

- Install a minimum 30” wide flume to convey the 60” diameter MRPIE through the structure

Diversion Setup No. 21

Manhole “NHV 2-36”

- Install a plug on the outgoing 60” diameter MRPIE, Sewer “NHV 2-36-17” o Incoming flow is split between the 66” diameter MRIR and the 78” diameter RVI, Sewers “NHV 2-35-34” and “NHV 2-35-24”, respectively

June 10, 2024 Page 7 Phase 2C/3C - Pipe Rehabilitation

Diversion Setup No. 22

Manhole “NHV 2-35”

- Install a plug on the outgoing 78” diameter RVI, Sewer “NHV 2-35-24” o Incoming flow is split between the 66” diameter MRIR and the 60” diameter MRPIE, Sewers “NHV 2-35-34” and “NHV 2-36-17”, respectively

Approximately 100 feet upstream of Manhole “RVI 6-09”

- Install a plug on the 18” diameter City of Dearborn Heights interconnection sewers

Diversion Setup No. 23

Manhole “NHV 2-36”

- Install a plug on the outgoing 66” diameter MRIR, Sewer “NHV 2-36-35” o All incoming flow is diverted to the outgoing 60” diameter MRPIE, Sewer “NHV 2-36-17”

Manhole “NHV 2-35”

- Install a minimum 30” wide flume to convey the 78” diameter RVI through the structure.

Diversion Setup No. 24

Manhole “NHV 2-35”

- Install a plug on the outgoing 66” diameter MRIR, Sewer “NHV 2-35-34” o All incoming flow is diverted to the outgoing 78” diameter RVI, Sewer

“NHV 2-35-24”

Manhole “NHV 2-17”

- Install a plug on the 18” diameter City of Dearborn Heights interconnection sewer

Diversion Setup No. 25

Manhole “NHV 2-08”

- Close the gate on the outgoing 60” diameter MRPIE, Sewer “JC 2-8A-06A” o All incoming flow is diverted to the outgoing 66” diameter MRIR and 78” diameter RVI, Sewers “NHV 2-08-08A” and “JC 2-8-01A”, respectively

Manhole “RVI 4-16C”

- Install a plug on the 12” diameter City of Dearborn Heights interconnection sewer

Diversion Setup No. 26

Manhole “NHV 2-08”

- Close the gate on the outgoing 78” diameter RVI, Sewer “JC 2-8-01A” o All incoming flow is diverted to the outgoing 66” diameter MRIR and 60” diameter MRPIE, Sewers “NHV 2-08-08A” and “JC 2-8A-06A”, respectively

Diversion Setup No. 27

Manhole “NHV 5A-1A”

- Install a plug on the outgoing 54” diameter RVI, Sewer “NHV 5A-1A-18”

June 10, 2024 Page 8 Phase 2C/3C - Pipe Rehabilitation o All incoming flow is diverted to the outgoing 42” diameter PWI, Sewer

“NHV 5A-01-11”

Diversion Setup No. 28

Manhole “SA06SE043”

- Install a plug on the outgoing 30” diameter Red Run Drain, Sewer

“SA06SE043-SA06SE042”

o Requires permission from the City of Dearborn Heights o All flow will divert to the 54” DHLI, Sewer “SA06SE017-SA06SE002”

Diversion Setup No. 29

Manhole “RVI 6-42A”

- Install a plug on the outgoing 66” diameter RVI, Sewer “RVI 6-42-41” o All incoming flow is diverted to the outgoing 54” diameter MRIR, Sewer

“NHV 3-X-20”

Manhole “NHV 3-13”

- Install a minimum 30” wide flume to convey the 54” diameter MRIR through the structure.

Diversion Setup No. 30

Manhole “NHV 3-13”

- Install a plug on the outgoing 54” diameter MRIR, Sewer “NHV 3-13-12” o All incoming flow is diverted to the outgoing 66” diameter RVI, Sewer

“NHV 3-13-37”

Diversion Setup No. 31

Manhole “RVI 6-42A”

- Install a plug on the outgoing 66” diameter MRIR, Sewer “NHV 3-X-X” o All incoming flow is diverted to the outgoing 66” diameter RVI, Sewer

“RVI 6-42-41”

Manhole “NHV 3-38”

- Install a plug on the outgoing 42” diameter MRIR, Sewer “NHV 3-38-16” o All incoming flow is diverted to the outgoing 48” diameter MRPIE, Sewer “NHV-3-38-9”

Manhole “NHV 3-13”

- Install a minimum 30” wide flume to convey the 66” diameter RVI through the structure.

Diversion Setup No. 32

Lift Station 1A

- Take pump station out of operation and apply lock-out/tag-out .

F. Of note, Diversion Setups Nos. 12A and 23 may be utilized for repair of the Junction chambers JC 3-21 and JC 2-35, respectively.

June 10, 2024 Page 9 Phase 2C/3C - Pipe Rehabilitation

G. Some pipe segments do not have any upstream diversion opportunities available.

Therefore, bypass pumping from an upstream manhole to a downstream manhole around the pipe segment is the only option for flow control. These pipe segments and their estimated dry weather flow rates are presented in Table 2. The Contractor shall develop concepts and implement temporary bypass pumping for work in these reaches.

H. With flow diversion implemented, some pipe segments will experience backwater conditions from downstream sewer depths. A downstream plug or dam and pump out would be needed to fully drain these pipe segments.

I. Implementation of flow diversion will cause increase to flow rates in the reaches into which flow is diverted and precludes work from being performed in these reaches as shown in Table 1.

J. Community connection sanitary sewers discharge into the RVSDS interceptors along the Work extent.

1. Table 3 presents the RVSDS manhole into which the community connection discharges and the estimated dry weather flow rate for each community connection,

2. Table 4 presents recommended bypass pumping concepts for diverting flow from these community connections into adjacent RVSDS sewers.

3. The following three community connections can be diverted through other means:

a. Community Connection No. 1 can be diverted by gravity to PWI 2- 05 by installing a plug at Manhole NHV 5B-18.

b. Community Connection No. 15 can be diverted by gravity to Dearborn Heights RTB installing a plug in the dry weather conduit at Regulator M-33.

c. Community Connection No. 16 is the discharge line for the dewatering pump at the Dearborn Heights RTB. This connection can be emptied by turning off the dewatering pump.

K. Public comfort stations exist along the Work extent that discharge sanitary flow directly into the RVSDS interceptors. The location and into which interceptor pipe these connections occur is currently unknown. Also, whether upstream manholes or clean outs exist that could be used for bypass withdrawal is also unknown.

Therefore, it is recommended that these comfort stations be placed temporarily out of service if their sanitary flow is needed to be stopped for the execution of the Work.

1. Nolar Bend Recreation Center - 26829-27145 Edward N Hines Dr, Dearborn Heights, MI 48127 likely connects along Pipe Segment MR II-19- 18 (11P)

June 10, 2024 Page 10 Phase 2C/3C - Pipe Rehabilitation

2. Parr Recreation Area – 24140 Edward N Hines Dr, Dearborn Heights, MI 48127 likely connects along Pipe Segment NHV 3-02-01

3. Helms Haven Recreation Area – 22777-22899 Edward N Hines Dr, Dearborn Heights, MI 48127 likely connects along Pipe Segment NHV 2- 24-23

4. Boy Scout Shelter Recreation Area – 23833 Edward N Hines Dr, Dearborn Heights, MI 48127 likely connects along Pipe Segment NHV 2-34-33

L. Existing area velocity flow meters are installed on each of the interceptor pipes at the downstream end of the Work extent in each area. These flow meters may be used to review current system conditions prior to commencing flow diversion and bypass pumping activities.

M. Wet weather conditions in the RVSDS are characterized by flow depths that surcharge the interceptor pipes. This surcharging is due to a combination of excessive flows and downstream backwater conditions. Because of the downstream backwater condition, flow diversion and bypass pumping during any wet weather condition is infeasible. The RVSDS is also located within the flood plain of the Rouge River and may experience surface inundation.

N. At the request of the Contractor, the Engineer can provide GIS shapefiles of the RVSDS system.

June 10, 2024 Page 11 Phase 2C/3C - Pipe Rehabilitation

Table 1. Pipe Segments with Upstream Diversion Possible

Pipe Segment/

Structure ID

Diameter

(in)

Work

Planned

Diversion

Setup

No.

Precludes

Diversion

Setup

Nos.

Average Dry

Weather Flow Rate

In Pipe Segment

(cfs) Downstream Flow

Meter(s)

Tributary

Community

Connection

IDs

Backwater

Present Without

Upstream

Diversion

(cfs)

With

Upstream

Diversion

(cfs)

RVI 15-04-03 54 Grouting 1 -- 4.7 0.7 P21 1,2 No

NHV 5C-10-09 36 Grouting 2 3 7.7 T P3, P26 n/a No

PWI 3-03 (4P)-02 30 Grouting 3 2 1.2 T P3, P26 n/a Yes

NHV 5A-19-18 48 Grouting 4 -- 8.9 0.1 P9, P10, P11 3 No

NHV 5A-18-17 48 Grouting 4 -- 8.9 0.1 P9, P10, P11 3 No

NHV 5A-14-13 48 Grouting 4 -- 8.9 0.1 P9, P10, P11 3 No

NHV 5A-11-10 48 Grouting 4 -- 8.9 0.1 P9, P10, P11 3 No

NHV 5A-09-08 48 Grouting 4 -- 8.9 0.1 P9, P10, P11 3 No

NHV 5A-10-09 48 Grouting 4 -- 8.9 0.1 P9, P10, P11 3 No

NHV 5A-08-07 48 Grouting 4 -- 8.9 0.1 P9, P10, P11 3 No

NHV 5A-06-05 48 Grouting 4 -- 8.9 0.1 P9, P10, P11 3 No

NHV 5A-04-03 (6P) 48 Grouting 4 -- 8.9 0.1 P9, P10, P11 3 Yes

NHV 5A-44-43 48 Grouting 4 -- 8.9 0.1 P9, P10, P11 3 No

NHV 5A-41-40 48 Grouting 4 -- 8.9 0.1 P9, P10, P11 3 No

NHV 5A-28-27 48 Grouting 4 -- 8.9 0.1 P9, P10, P11 3 No

NHV 5B-05-04 42 Grouting 4 -- 8.9 0.1 P9, P10, P11 3 No

NHV 5A-40-39 48 Grouting 4 -- 8.9 0.1 P9, P10, P11 3 No

NHV 5B-03-02 42 Grouting 4 -- 8.9 0.1 P9, P10, P11 3 No

NHV 5A-47-46 48 Rehab #1 4 -- 8.9 0.1 P9, P10, P11 3 No

NHV 5A-46-45 48 Rehab #1 4 -- 8.9 0.1 P9, P10, P11 3 No

RVI 8-20-19 60 Grouting 5 6,7 20.8 T P9, P10, P11 n/a No

June 10, 2024 Page 12 Phase 2C/3C - Pipe Rehabilitation

Pipe Segment/

Structure ID

Diameter

(in)

Work

Planned

Diversion

Setup

No.

Precludes

Diversion

Setup

Nos.

Average Dry

Weather Flow Rate

In Pipe Segment

(cfs) Downstream Flow

Meter(s)

Tributary

Community

Connection

IDs

Backwater

Present Without

Upstream

Diversion

(cfs)

With

Upstream

Diversion

(cfs)

RVI 8-13-12 60 Grouting 5 6,7 20.8 T P9, P10, P11 n/a Yes

RVI 8-14-13 60 Grouting 5 6,7 20.8 T P9, P10, P11 n/a Yes

MR III-23B-26 60 Grouting 5 6,7 20.8 T P9, P10, P11 n/a No

MR III-20-19 42 Grouting 6 5,7 4.8 3.4 P9, P10, P11 4 No

MR III-19-18 42 Grouting 6 5,7 4.8 3.4 P9, P10, P11 4 No

MR III-18-17 42 Grouting 6 5,7 4.8 3.4 P9, P10, P11 4 No

MR III-16-15 42 Grouting 6 5,7 4.8 3.4 P9, P10, P11 4,5 No

MR III-15-14 42 Grouting 6 5,7 4.8 3.4 P9, P10, P11 4,5 No

MR III-12A-16C 48 Grouting 6 5,7 7.5 6.1 P9, P10, P11 4,5,6 Yes

NHV 4A-17A-16A 30 Grouting 7 5,6 0.4 0.4 P9, P10, P11 7,8,9 Yes

MR III-11-10A 48 Grouting 8 9 7.4 T P9, P10, P11 10 No

MR III-05-04 48 Grouting 8 9 7.4 T P9, P10, P11 10 No

NHV 4A-09-08 24 Grouting 9 8 0.1 T P9, P10, P11 n/a No

NHV 4A-08-07 24 Rehab #3 9 8 0.1 T P9, P10, P11 n/a No

MR III-02-01 48 Grouting 10 11,12 7.9 T P9, P10, P11 n/a No

MR II-19-18 (11P) 48 Grouting 10 11,12 8.1 0.3 P33, P34, P35 11,12 No

MR II-17-0007 48 Grouting 10 11,12 8.2 0.5 P33, P34, P35 11,12,13 No

MR II-11-10 48 Grouting 10 11,12 8.4 0.5 P33, P34, P35 11,12,13 No

MR II-12-11 48 Grouting 10 11,12 8.4 0.2 P33, P34, P35 11,12,13 No

NHV 6-54-53 66 Grouting 11 10,12 29.8 T P9, P10, P11 n/a No

NHV 3-29-X, NHV-X-3-28 42 Rehab #2 12 10,11 6.1 T P33, P34, P35 n/a No

NHV 3-26-25 42 Grouting 12 10,11 6.1 T P33, P34, P35 n/a No

NHV 3-25-24 42 Rehab #5 12 10,11 6.1 T P33, P34, P35 n/a No

June 10, 2024 Page 13 Phase 2C/3C - Pipe Rehabilitation

Pipe Segment/

Structure ID

Diameter

(in)

Work

Planned

Diversion

Setup

No.

Precludes

Diversion

Setup

Nos.

Average Dry

Weather Flow Rate

In Pipe Segment

(cfs) Downstream Flow

Meter(s)

Tributary

Community

Connection

IDs

Backwater

Present Without

Upstream

Diversion

(cfs)

With

Upstream

Diversion

(cfs)

NHV 3-24-23 42 Rehab #5 12 10,11 6.1 T P33, P34, P35 n/a Yes

(Structure) JC 3-21 -- Rehab #4 12A 10,11 6.1 T P33, P34, P35 n/a Yes

NHV 3-X-20 54 Grouting 13 10,11 16.9 T P33, P34, P35 n/a No

SA06SE016-SA06SE032 48 Grouting 14 15,28 2.6 T P33, P34, P35 n/a Yes

SA06SE032-38 48 Grouting 14 15,28 2.6 T P33, P34, P35 n/a Yes

MR II-10-38 48 Grouting 15 14 8.9 0.4 P33, P34, P35 n/a No

NHV 3-38-16 42 Grouting 16 -- 2.3 T P33, P34, P35 n/a No

RVI 6-37-36 66 Lining 17 30 21.1 T P33, P34, P35 n/a No

RVI 6-36-35 66 Lining 17 30 21.1 T P33, P34, P35 n/a No

RVI 6-35-34 66 Lining 17 30 21.1 T P33, P34, P35 n/a No

RVI 6-34-33 66 Lining 17 30 21.1 T P33, P34, P35 n/a No

RVI 6-33-32 66 Lining 17 30 21.1 T P33, P34, P35 n/a No

RVI 6-32-31 66 Grouting, Lining 17 30 21.1 T P33, P34, P35 n/a No

RVI 6-31-30 66 Lining 17 30 21.1 T P33, P34, P35 n/a Yes

SA05SE034-27 66 Grouting 18 19 21.1 T P30, P31, P32 n/a Yes

MR I-18-36 60 Grouting 19 20,22,24 14.3 T P30, P31, P32 14 No

MR I-17A-2-36 60 Grouting 19 20,22,24 14.3 T P30, P31, P32 14 No

NHV 2-36-17 60 Grouting 19 20,22,24 7.4 T P30, P31, P32 14 Yes

NHV 2-37-36 66 Grouting 20 19 17.2 T P30, P31, P32 n/a Yes

MR I-17-16 60 Grouting 21 22,24 7.5 0.1 P30, P31, P32 n/a No

MR I-16-15 60 Grouting, Lining 21 22,24 7.8 0.3 P30, P31, P32 15 No

MR I-15-14 60 Grouting, Lining 21 22,24 7.8 0.3 P30, P31, P32 15 No

MR I-14-13 60 Lining 21 22,24 7.8 0.3 P30, P31, P32 15 No

June 10, 2024 Page 14 Phase 2C/3C - Pipe Rehabilitation

Pipe Segment/

Structure ID

Diameter

(in)

Work

Planned

Diversion

Setup

No.

Precludes

Diversion

Setup

Nos.

Average Dry

Weather Flow Rate

In Pipe Segment

(cfs) Downstream Flow

Meter(s)

Tributary

Community

Connection

IDs

Backwater

Present Without

Upstream

Diversion

(cfs)

With

Upstream

Diversion

(cfs)

MR I-13-12 60 Lining 21 22,24 7.8 0.3 P30, P31, P32 15 No

MR I-12-11 60 Lining 21 22,24 7.8 0.3 P30, P31, P32 15 No

RVI 6-22-21 78 Grouting, Lining 22 21,24 34.7 T P30, P31, P32 n/a No

RVI 6-21-20 78 Grouting, Lining 22 21,24 34.7 T P30, P31, P32 n/a No

RVI 6-20-19 78 Grouting, Lining 22 21,24 34.7 T P30, P31, P32 n/a No

RVI 6-19-18 78 Grouting, Lining 22 21,24 34.7 T P30, P31, P32 n/a No

RVI 6-18-17 78 Grouting, Lining 22 21,24 34.7 T P30, P31, P32 n/a No

RVI 6-17-16 78 Grouting, Lining 22 21,24 34.7 T P30, P31, P32 n/a No

RVI 6-16-15 78 Grouting, Lining 22 21,24 34.7 T P30, P31, P32 n/a No

RVI 6-15-14 78 Grouting, Lining 22 21,24 34.7 T P30, P31, P32 n/a No

RVI 6-14-13 78 Grouting, Lining 22 21,24 34.7 T P30, P31, P32 n/a No

RVI 6-07-06 78 Grouting 22 21,24 34.7 T P14, WC-S-2, WC-S-3 n/a Yes

JC 2-35 -- Rehab #6 23 19,20,21,22 18.1 T P14, WC-S-2, WC-S-3 n/a No

NHV 2-35-34 66 Grouting 24 21,22 18.1 T P14, WC-S-2, WC-S-3 n/a No

NHV 2-34-33 66 Grouting 24 21,22 18.1 T P30, P31, P32 n/a No

NHV 2-33-32 66 Grouting 24 21,22 18.1 T P30, P31, P32 16 No

NHV 2-32-31 66 Lining 24 21,22 18.1 T P30, P31, P32 16,17 No

NHV 2-31-30 66 Lining 24 21,22 18.1 0.1 P30, P31, P32 16,17 No

NHV 2-30-29 66 Grouting, Lining 24 21,22 18.1 0.1 P30, P31, P32 16,17 No

NHV 2-29-28 66 Grouting, Lining 24 21,22 18.1 0.1 P30, P31, P32 16,17 No

NHV 2-28-27 66 Grouting, Lining 24 21,22 18.1 0.1 P30, P31, P32 16,17 No

NHV 2-27-26 66 Lining 24 21,22 18.1 0.1 P30, P31, P32 16,17 No

NHV 2-26-25 66 Grouting, Lining 24 21,22 18.1 0.1 P30, P31, P32 16,17 No

June 10, 2024 Page 15 Phase 2C/3C - Pipe Rehabilitation

Pipe Segment/

Structure ID

Diameter

(in)

Work

Planned

Diversion

Setup

No.

Precludes

Diversion

Setup

Nos.

Average Dry

Weather Flow Rate

In Pipe Segment

(cfs) Downstream Flow

Meter(s)

Tributary

Community

Connection

IDs

Backwater

Present Without

Upstream

Diversion

(cfs)

With

Upstream

Diversion

(cfs)

NHV 2-25-24 66 Grouting, Lining 24 21,22 18.1 0.1 P30, P31, P32 16,17 No

NHV 2-24-23 66 Grouting, Lining 24 21,22 18.1 0.1 P30, P31, P32 16,17 No

NHV 2-23-22 66 Grouting, Lining 24 21,22 18.1 0.1 P30, P31, P32 16,17 No

NHV 2-22-21 66 Grouting, Lining 24 21,22 18.1 0.1 P30, P31, P32 16,17 No

NHV 2-20-19 66 Grouting 24 21,22 18.1 0.1 P14, WC-S-2, WC-S-3 16,17 No

NHV 2-19-18 66 Grouting 24 21,22 18.1 0.1 P14, WC-S-2, WC-S-3 16,17 No

NHV 2-13-12 66 Grouting 24 21,22 20.4 2.4 P14, WC-S-2, WC-S-3 16,17 No

NHV 2-17-16 66 Grouting 24 21,22 20.4 2.4 P14, WC-S-2, WC-S-3 16,17 No

NHV 2-14-13 66 Grouting 24 21,22 20.4 2.4 P14, WC-S-2, WC-S-3 16,17 No

MR I-06A-04 (JC) 60 Grouting 25 26 4.0 0.1 P14, WC-S-2, WC-S-3 18 No

MR I-05A-05 60 Grouting 25 26 4.4 0.4 P14, WC-S-2, WC-S-3 18,19 No

RVI 4-14-13 78 Grouting 26 25 48.4 0.1 P14, WC-S-2, WC-S-3 20 No

RVI 9-03-02 54 Grouting 27 -- 6.4 T P9, P10, P11 n/a No

MR II-10F-10 36 Grouting 28 14 0.4 T P33, P34, P35 n/a Yes

RVI 6-38-13 66 Lining 29 13,16,31 19.0 T P33, P34, P35 n/a No

NHV 3-13-37 66 Lining 29 13,16,31 21.1 T P33, P34, P35 n/a No

NHV 3-13-12 54 Lining 31 17,18,29 17.2 T P33, P34, P35 n/a No

NHV 3-15-13 54 Lining 31 17,18,29 19.3 T P33, P34, P35 n/a No

NHV 3-12-11 54 Lining 30 17 17.2 T P33, P34, P35 n/a No

NHV 3-11-10 54 Lining 30 17 17.2 T P33, P34, P35 n/a No

NHV 3-10-09 54 Lining 30 17 17.2 T P33, P34, P35 n/a No

NHV 3-09-08 54 Lining 30 17 17.2 T P33, P34, P35 n/a No

NHV 3-08-07 54 Lining 30 17 17.2 T P33, P34, P35 n/a No

June 10, 2024 Page 16 Phase 2C/3C - Pipe Rehabilitation

Pipe Segment/

Structure ID

Diameter

(in)

Work

Planned

Diversion

Setup

No.

Precludes

Diversion

Setup

Nos.

Average Dry

Weather Flow Rate

In Pipe Segment

(cfs) Downstream Flow

Meter(s)

Tributary

Community

Connection

IDs

Backwater

Present Without

Upstream

Diversion

(cfs)

With

Upstream

Diversion

(cfs)

NHV 3-07-06 54 Lining 30 17 17.2 T P33, P34, P35 n/a No

NHV 3-06-05 54 Lining 30 17 17.2 T P33, P34, P35 n/a No

NHV 3-05-04 54 Lining 30 17 17.2 T P33, P34, P35 n/a No

NHV 3-04-03 54 Lining 30 17 17.2 T P33, P34, P35 n/a No

NHV 3-03-02 54 Lining 30 17 17.2 T P33, P34, P35 n/a No

NHV 3-02-01 54 Lining 30 17 17.2 T P33, P34, P35 n/a Yes

X-SA10SE024 72 Grouting 32 -- T T P33, P34, P35 n/a No

*T = Trace amount of flow may still be present from infiltration or unknown connections.

June 10, 2024 Page 17 Phase 2C/3C - Pipe Rehabilitation

Table 2. Pipe Segments without Upstream Diversion Possible

Pipe Segment ID Work Planned

Average Dry Weather Flow Rate in Pipe

Segment (cfs)

Downstream Flow Meter(s)

RVI 4-28-26 Grouting 19.5 P3, P26

RVI 4-30-29 Grouting 19.5 P3, P26

RVI 5-05-04 Grouting 19.5 P3, P26

NHV 6-12-11 Grouting 8.8 P3, P26

NHV 6-06-05B Grouting 8.8 P3, P26

NHV 6-07-06 Grouting 8.8 P3, P26

NHV 6-09-08 Grouting 8.8 P3, P26

NHV 6-16-15 Grouting 8.3 P3, P26

LIV-13-14 Grouting 0.4 P9, P10, P11

RVI 10-02-01 Grouting 2.5 P8

RVI 9-IT5-IT4 Grouting 2.5 P8

5L-15-23A Grouting 5.5 P9, P10, P11

SSMAIN-06028 Grouting 5.5 P9, P10, P11

SSMAIN-00735 Grouting 5.5 P9, P10, P11

SSMAIN-00376 Grouting 5.5 P9, P10, P11

SSMAIN-00380 Grouting 5.5 P9, P10, P11

SSMAIN-01399 Grouting 5.5 P9, P10, P11

5L-02-01 Grouting 0.1 P9, P10, P11

0003-02 Grouting 0.2 P33, P34, P35

INK-14-07 Grouting 0.04 P33, P34, P35

June 10, 2024 Page 18 Phase 2C/3C - Pipe Rehabilitation

Table 3. Flow Information for Community Connection Sewers

Community

Connection

ID

From Municipality Discharges to

Interceptor Manhole

Diameter (in)

Direction

Estimated Dry Weather Flow Rate (cfs)

Average Maximum

1 Wayne RVI 15-12 12 N 0.02 0.02

2 Wayne/Westland RVI 15-11 18 N 0.64 0.82

3 Livonia NHV 5B-17 18 NE 0.12 0.15

Garden City/

Westland Not in GIS

(MH1 on Plans)

27 SW 3.36 4.28

5 Westland MR III-17 10 S 0.02 0.02

Garden City/

Westland

MR III-13 (2) 16.5 SE 2.64 3.36

7 Westland NHV 4A-23 15 N 0.16 0.20

8 Westland NHV 4A-19 12 NW 0.12 0.15

9 Westland NHV 4A-17A 15 NW 0.13 0.17

10 Westland MR III-11 12 N 0.03 0.03

11 Westland MR III-01 12 NW 0.15 0.19

12 Dearborn Heights MR II-17 18 NW 0.18 0.22

13 Dearborn Heights Blind tap along

MR II-16-15A

15 NE 0.19 0.24

14 Dearborn Heights Blind tap along

MRI-17A-2-36

12 N 0.09 0.11

15 Dearborn Heights MR I-16 12 S 0.25 0.32

Wayne County

(Dearborn Heights RTB Dewatering)

NHV 2-33 14 S 0.00 0.00

17 Dearborn Heights NHV 2-31 8 S 0.07 0.09

18 Dearborn Heights Blind tap along

MR I-06A-04 (JC)

18 N 0.06 0.08

19 Dearborn Heights MR I-05A 21 N 0.38 0.49

20 Dearborn Heights RVI 4-16C 12 S 0.07 0.09

June 10, 2024 Page 19 Phase 2C/3C - Pipe Rehabilitation

Table 4. Bypass Pumping Concepts for Community Connection Sewers

Community Connection

ID

Suggested Withdrawal Manhole Suggested Discharge Manhole Approx.

Overland Distance

(ft) ID Invert (ft-

NAVD88)

Depth to Grade (ft)

ID

Invert (ft-

NAVD88)

Depth to Grade (ft)

RVI 15-05 614.22 11.4 RVI 15-02 613.20 14.25 1,100

Not in GIS

(MH2 on Plans)

612.39 24.3 RVI 8-26 608.78 29.3 500

5 5L-08 610.50 7.3 RVI 8-19 605.33 12.1 100

6 5L-04 606.26 8.9 RVI 8-13 603.61 12.2 400

7 SSMH-06113 611.00 8.2 RVI 8-19 605.33 12.1 350

8 NHV 4A-19A 608.60 9.6 RVI 8-15 604.19 11.7 60

9 5L-01 608.50 6.4 RVI 8-13 603.61 12.2 150

10 SSMH-06105 618.20 12.0 RVI 8-09 602.37 12.6 200

11 6L-01 604.48 6.1 NHV 4A-01 599.92 9.6 150

12 INK-03 596.15 9.4 NHV 3-29 595.03 12.5 50

13 INK-08 597.72 9.0 RVI 6-47 593.62 12.2 100

14 SA04SW075 n/a n/a NHV 2-37 582.65 22.7 30

17 INK-23 583.84 12 RVI 6-22 581.07 13.6 600

18 SA10SW082 578.95 8.0 NHV 2-07 571.62 20.6 60

19 SA10SW013 578.35 9.2 SA10SW081 580.27 5.5 150

20 SA10SW033 581.59 12.0 NHV 2-08 575.12 14.4 300

June 10, 2024 Page 20 Phase 2C/3C - Pipe Rehabilitation

1.2 SUBMITTALS.

A. The design, installation, and operation of the temporary flow diversions and bypass pumping system shall be the Contractor's responsibility. The bypass system shall meet the requirements of all codes and regulatory agencies having jurisdiction.

Prior to beginning any work, the Contractor is required to prepare and submit a Flow Diversion and Bypass Pumping Plan for each set-up that includes:

1. A plan view layout showing the suction and discharge manholes, suction and discharge piping routes, access paths, and staging areas for pumps, generators, and other equipment.

2. Locations and details of temporary modifications to the existing sewer such as sewer plugs and diversion dams, if any.

3. Locations and details of temporary pipe supports and anti-meandering provisions such as thrust blocks, joint restraints, and wall anchoring, if any.

4. A schedule for the installation, expected duration, and frequency of flow diversion and/or by-pass pumping operations.

5. A maintenance plan for ensuring general pump and equipment upkeep and working order of the bypass system. This plan must include maintenance frequency and measures for how potential ragging or clogging issues will be addressed and disposal of debris cleaned during the bypass period.

6. A monitoring plan for measuring and recording upstream levels and flow rates through the flow diversion or bypass pumping system.

7. Size, length, quantity, and material of all piping and valves.

8. Product specification sheets for pumps, valves, piping, generators, and other equipment utilized for each set up.

9. Total dynamic head (TDH) requirements of the pumping system including static lift, friction losses, minor losses, and flow velocities. Pump curves shall be included in the TDH analysis to show expected operating range.

10. Method of protecting discharge manholes or structures from erosion or damage.

11. Standby power generation size, location, and determination.

12. Modifications needed to manholes, if any, and subsequent restoration plan.

13. Traffic, noise, and odor control measures.

14. A Bypass Pumping Notifications and Emergency Contact Plan that includes:

a. Notification of Owner and Engineer 24 hours prior to initiating any flow diversion or bypass pumping.

June 10, 2024 Page 21 Phase 2C/3C - Pipe Rehabilitation

OWNER CONTACT INFORMATION

Patrick Cullen 3600 Commerce Court Wayne, MI 48184 O: 734-326-4437 pcullen@waynecounty.com

b. 24 Hour Emergency Contacts to include Prime Contractor, All Sub- Contractors, Fuel Delivery, and Replacement Equipment.

15. Emergency plan for adverse weather, flooding, accidents, or equipment failures.

PART 2 – PRODUCTS

Not Used

PART 3 – EXECUTION

3.1 FIELD INVESTIGATIONS AND TESTING

A. Prior to beginning any work, the Contractor shall conduct the necessary field investigations to locate existing manholes, determine clear space within the manhole structure, and measure wastewater depths. No allowances shall be made for conditions found during the progress of the work due to the Contractor’s failure to verify such conditions.

B. The temporary bypass pumping discharge piping shall be leak and pressure tested prior to conveyance of any sanitary sewage. The pressure and leakage test shall be conducted at one-and-a-half times the maximum pressure the system will experience based on the approved Bypass Pumping Plan for a period of two hours.

C. The Contractor shall test and verify that the temporary bypass pumping set-ups will maintain wastewater depths to acceptable depths. Reporting of the test runs is required prior to the commencement of the rehabilitation work.

3.2 REQUIREMENTS

A. No construction shall begin until the Flow Diversion and Bypass Pumping Plan has been reviewed and approved by the Engineer.

B. The Contractor is to furnish all materials, labor, equipment, power, maintenance, etc. to implement a temporary pumping and monitoring system for the purpose of diverting the existing flow around the work area for the duration of the project.

June 10, 2024 Page 22 Phase 2C/3C - Pipe Rehabilitation

C. Plugging of the sewer and/or temporary bypass pumping to perform rehabilitation work will only be undertaken during dry weather conditions when the tributary flow rates are within the discharge capacity of the bypass pumping set-up. If dry weather flows are being diverted to the Dearborn Heights RTB, coordination with the Owner and Owner’s representative, or their assign, is required to ensure that the RTB has capacity available and has adequately dewatered from any previous wet weather or flow diversions.

OWNER’S REPRESENTATIVE FOR DEARBORN HEIGHTS RTB

Daniel Swiecki, Supervisor of Operations 3600 Commerce Court Wayne, MI 48184 C: 313-213-5243 dswiecki@waynecounty.com

D. Flow rates in the RVSDS vary daily, seasonally, and with rainfall/snowmelt patterns. When wet weather conditions occur, the Contractor shall cease rehabilitation work, flow diversions, and bypass pumping. During these conditions, gravity flow shall be restored through the removal of any sewer plugs, materials, and equipment. Wet weather conditions are defined as:

a. Any significant precipitation or snowmelt (e.g., greater than about

0.05 inches of water depth) is occurring over the tributary service area or

b. Any significant precipitation or snowmelt (e.g., greater than about

0.05 inches of water depth) is forecasted to occur over the tributary service area during the work shift.

2. Dry weather conditions are defined as all of the following being true:

a. No significant precipitation or snowmelt (e.g., greater than about

0.05 inches of water depth) is occurring over the tributary service area,

b. Any previously elevated interceptor depths and flow rates following wet weather have receded to acceptable levels for flow diversions and bypass pumping to occur, and

c. The previous day’s daily average flow rates are less than the maximum dry weather flow rate presented in Table 5.The Engineer will provide daily flow monitoring reports to the Contractor.

The Contractor shall assume two workdays per week, on average, will be wet weather days. The Contractor shall assume one workday per month, on average, will be considered an Owner maintenance day where work will be precluded in all or part of the RVSDS.

June 10, 2024 Page 23 Phase 2C/3C - Pipe Rehabilitation

Table 5. Interceptor Flow Information

Meter Manhole ID Dry Weather Flow (cfs)

Average Maximum

P8 RVI 9-20 2.0 2.9

Total 2.0 2.9

P21 RVI 14-19 9.4 16.3

Total 9.4 16.3

P3 NHV 5C-01 9.7 12.2

P26 PWI 2-05 0.2 0.5

Total 9.9 12.7

P9 NHV 3-34 3.6 8.0

P10 RVI 6-51 24.4 34.6

P11 MR II-19 12.9 18.3

Total 41.0 60.9

P33 MR II-01 11.1 15.1

P34 RVI 6-28 19.9 31.0

P35 NHV 3-01 14.5 21.8

Total 45.5 67.9

P30 MR I-11 17.2 24.1

P31 RVI 6-12 25.2 39.1

P32 NHV 2-21 13.7 23.2

Total 56.1 86.3

P14 RVI 4-03 40.5 54.8

WC-S-2 + WC-S-3 MR IA-07 16.9 33.9

Total 57.4 88.7

June 10, 2024 Page 24 Phase 2C/3C - Pipe Rehabilitation

E. For some items of work, extended periods of dry weather are required. No additional compensation shall be given to the Contractor for the suspension of Work due to wet weather conditions.

F. Following wet weather, the Contractor shall clean work areas and repair work damaged by wet weather, if any, at no additional cost to the Owner.

G. Bypass pumping equipment shall be capable of handling typical sanitary sewer solids, trash, rags, and debris. The Contractor shall maintain equipment in good working order at all times. At a minimum, the pumps must be capable of passing a 3-inch solid.

H. Each bypass pumping setup shall have a capacity of at least twice the maximum dry weather flow rate of the bypassed sewer. The dry weather flow rates are provided in the tables of this specification.

I. During bypass pumping operations, the Contractor shall have an extra redundant pump of equivalent capacity available on site.

J. All sanitary customers of the sewer system shall be provided uninterrupted service.

K. The Contractor shall provide a dedicated operator on-site for each bypass pumping system whenever the bypass pumping system is in operation to monitor conditions and performance, ensure proper operation, and facilitate removal of any sewer plugs and restoration of gravity flow as conditions dictate. Operators shall be properly trained, experienced, and mechanically qualified such that they can quickly and effectively address any potential emergency and non-emergency situations associated with the pumps and bypass pumping system.

L. The Contractor is responsible for cleaning of debris that collects on equipment and properly disposing of such debris material.

M. The Contractor is solely responsible for the safety of personnel, vehicles, equipment, material, and tools used by the Contractor to perform the bypass pumping work.

N. The Contractor shall remove any manhole frames, covers, cones, and steps as required to provide clear access to perform the flow diversion and bypass pumping work.

O. The Contractor shall provide any necessary traffic control.

P. The Contractor shall provide site security measures.

Q. The Contractor shall clean any sediment, sludge, bricks, rubble, and debris from the pump intake area prior to the installation of the bypass pumps.

R. The Contractor shall not leave any vehicles, equipment, tools, or materials in the sewer when gravity flows are restored or in the floodplain during a surface flooding event.

June 10, 2024 Page 25 Phase 2C/3C - Pipe Rehabilitation

S. The Contractor shall be solely responsible for any basement back-ups, flooding, and damage caused by failure of the Contractor’s or Sub-contractor’s equipment, or from any vehicles, equipment, materials, and tools that are left in the sewer or in the floodplain.

T. The Contractor shall not allow the sewage depths in the RVSDS or community connections to increase to levels that create the risk of basement back-ups or spilling of wastewater to the environment.

U. The Contractor shall restore the manholes, lawns, plantings, and pavement to conditions equivalent to the pre-existing conditions.

V. The Contractor shall be required to repair, at no additional cost to the Owner, any damage to public or private property caused by their operations.

W. Should damage of any kind occur to the existing sewers, the Contractor shall, at no additional cost to the Owner, make repairs to the satisfaction of the Engineer and the governing agency having jurisdiction of the existing sewer.

X. The Contractor shall not be permitted discharge sanitary sewage to the environment.

Y. Upon the cessation of bypass operations, the Contractor shall restore normal gravity sewage flow in a gradual and controlled manner such that the release does not cause surcharging or other disturbances downstream.

Z. The Contractor shall immediately notify the Owner if a sanitary sewer overflow (SSO) occurs and take the necessary action to clean up and disinfect the spillage to the satisfaction of the Owner and the Michigan Department of Environment, Great Lakes, and Energy (EGLE). If sewage is spilled onto public or private property, the Contractor shall wash down, clean up, and disinfect the spillage to the satisfaction of the property owner and/or other governmental agency.

AA. When bypass operations are complete, all bypass piping shall be flushed with fresh water and drained into the wastewater system prior to disassembly and removal.

3.3 MEASUREMENT AND PAYMENT

A. Bypass Pumping, Furnish Lsum

B. Bypass Pumping, Operate Lsum

C. Flow Control, Diversion Lsum

END OF SECTION 33 40 00