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IFB0779-021419
ADDENDUM #1

2019 Sewer Replacement Project

Addendum #1 is being issued to respond to questions received from bidders:
1. Will Davis-Bacon or prevailing wages be in effect for this project?
Answer: Davis-Bacon Act prevailing wage rates do not apply to this project..

2. There is a conflict between the retainage as stated in the Instructions to Bidders,
Article 20 and the Sample Agreement.

Answer: Instructions for Bidders, Article 20, Retainage shall be deleted in its
entirety and replaced as follows:

ARTICLE 20 + =RETAINAGE

20.01 Provisions concerning retainage and Contractors’ rights to deposit
securities in lieu of retainage are set forth in the Agreement, Article 6.02
Progress Payments; Retainage.

3. Are flow rates available for bypass flow expectations?

Answer: Specific sanitary and storm water flow rates for the sewers to be replaced
are not available; however the attached Sewer Infrastructure Map dated
9/27/2018 is attached to this Addendum for reference. The map shows the
Nashua sewer system as well as general information about dry weather
flows at various CSOs in the City. Please be advised that all sewers to be
reconstructed are combined sanitary and storm sewers.

4. A question was asked regarding the lump sum payment for Mobilization (Item 24)?

Answer: Delete Paragraph 2.03 B of Section 01150, MEASUREMENT AND
PAYMENT, PART 2 - DESCRIPTION OF PAY ITEMS, and substitute
the following:

2019 Sewer Replacement Project Addendum #1
Nashua, NH Page I

2.03 PROJECT START-UP AND PROJECT CLOSE OUT:

A. MOBILIZATION
Measurement:
Mobilization shall be measured as a LUMP SUM as specified
herein. The total cost for this item shall not exceed 5 percent
of the total of all bid items excluding this item.

Payment:
The contract price for ITEM 24 shall constitute full

compensation to the Contractor for the general mobilization
and demobilization necessary to make the contract
operational, exclusive of the cost of materials. Payments
toward the lump sum will be made at each payment requisition
based on the percent of contract amount completed. Final
payment of this item will be paid based on the percent of the
contract amount completed. Should the contract be
terminated prior to completion, or the contract work not
completed, total payment for this item shall be proportional to
the percentage of the contract amount completed. No
additional payment will be made if the contract value is
increased.

5. A concern was raised regarding the maximum rate of $30 per hour for flaggers.

Answer: The City has decided to bid the cost for flaggers on an hourly basis
without specifying the maximum hourly rate. The Bid Schedule has been
revised to show the quantity of flagger hours under Item 26. Delete
Paragraph 2.04 B of Section 01150, MEASUREMENT AND PAYMENT,
PART 2 - DESCRIPTION OF PAY ITEMS, and substitute the following:

2.12 > MAINTENANCE AND PROTECTION OF TRAFFIC
B. FLAGGERS

Measurement:

The quantity of Flaggers will be measured by the HOUR
based on the actual number of hours authorized, as
determined by the Engineer. The Contractor shall supply
qualified flaggers as stated in Section 618 of the NADOT
Standard Specifications for Road and Bridge Construction,
(Approved and Adopted in 2016). Daily coverage needs to be
approved by the Engineer. The Contractor's schedule for
flaggers shall be agreed upon cooperatively with the Engineer.

2019 Sewer Replacement Project Addendum #1
Nashua, NH Page 2

Payment:

The approved quantity of flagger hours shall be paid at the
contract price for ITEM 26. Payment shall constitute full
compensation to the Contractor for providing qualified
flaggers as required to direct traffic through or around the
Work as ordered by the Engineer, including all labor, high
visibility safety gear, tools and any other equipment necessary
to complete the work as specified herein. Payments to
Contractor will be made based on approved hours and
resulting dollar amounts.

6. A question arose at the pre-bid meeting regarding handling of sewer service
connection flows during construction?

Answer:

Add the following item to Supplementary Conditions:

V. WORK PLAN
The Contractor shall submit a Work Plan to the Engineer for
acceptance prior to the start of work on any street. In order to be
considered acceptable the Work Plan must at a minimum address
the following:

>
>

>

Schedule for the work.

Proposed method for communication with affected residents
and businesses.

Proposed traffic control plan.

Proposed methods for handling sewage flows from upsteam
drainage areas.

Proposed methods for handling flow from sewer service
connections during construction of the sewer main.
Provisions the Contractor shall take in order to be able to
immediately address unforeseen backups that may occur in
services during work on the project.

The Contractor’s Work Plan shall comply with the following:

>

>

2019 Sewer Replacement Project

Nashua, NH

The Contractor shall provide access to local residents and
businesses at all times.

The main line sewer shall be reconnected and in service
after work hours. By-pass pumping over night and on
weekends and holidays shall not be allowed.

The Contractor shall advise residents and businesses in
advance and in writing of any impact to utility services.

Addendum #1
Page 3

> Methods proposed for maintaining flow in sewer mains and
service connections shall be described in detail, and shall
have been proven by successful use in similar past projects.

> The trench shall be plated after work hours, and the work
area shall be open to traffic.

7. Add the following Item to the SUPPLEMENTARY CONDITIONS:

W. AVOIDING PIPE AND CATCH BASIN CONFLICTS WITH
EXISTING UTILITIES

The Contractor shall excavate the trench for catch basins and
associated pipe laterals in advance of laying pipe in order to
determine whether any utility interferes with the proposed
alignment of pipelines and/or location of catch basins. Any
adjustments required to avoid utility conflicts shall be approved by
the Engineer prior to installation. The Contractor shall have on
hand several different 4’ diameter barrel sections for possible
adjustment to catch basin depth.

8. A question arose at the pre-bid meeting regarding hours of operation?

Answer: Add the following paragraph to Item C, SUPPLEMENTARY
CONDITIONS:

C. WORK HOURS

Bridge Street at C Street:

Working hours are from 9 am to 3 pm, with approved one lane
alternating traffic plan and/or detour in one direction. Any closures
of road will require work to be done during night hours.

Central Street at Ash Street:
Working hours are from 7 am to 5 pm, with an approved plan
having at a minimum one lane open in both directions.

Charles Street:

Working hours are from 8 am to 5 pm, with approved traffic
plan. An approved detour plan is required if closing street.

Note: The City reserves the right to stop work should traffic
controls prove to be inadequate. Should a problem arise as a result
of the approved traffic control plan, additional traffic control
measures may be required at the contractor’s expense.

2019 Sewer Replacement Project Addendum #1
Nashua, NH Page 4

9. REVISED BID SCHEDULE:

A revised BID SCHEDULE has been included in this Addendum for use by bidders
(See attached PDF).

10. REVISED SHEET 2 of 8 - QUANTITY SUMMARY:

A revised Sheet 2 of 8 - Quantity Summary has been included in this Addendum for
use by bidders (See attached PDF).

- END -

2019 Sewer Replacement Project Addendum #1
Nashua, NH Page 5

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