IFB1087-021219
ADDENDUM #1
2019 CIPP Lining Project
Addendum #1 is being issued to respond to questions or suggestions received from bidders:
1. In the design criteria for CIPP for the Nashua job the soil modulus design criteria calls
for 500 psi. Typically the soil modulus is 1000 psi. In using 500 psi for design, the
resulting liner thicknesses will be greater than they may need to be, and will cost the
City more money. Would a consideration be made to increase the soil modulus design
criteria to 1000 psi?
Answer: The design criterion for modulus of soil of 500 psi as specified in Sections
02650 and Section 02651 shall be revised to 1000 psi.
2. Would it be possible to have materials approved in advance of bidding for the manhole
rehabilitation work?
Answer: Product approvals will be handled after the bid has been awarded, and be
reviewed for compliance with the specifications by the Engineer as part of
the contract submittal process.
3. What is the Engineer’s estimate for Nashua?
Answer: The City will not provide bidders with the Engineer’s cost estimate for the
Project.
4. A suggestion was made for the City to reevaluate the basis for the quantities for the
point repair items. The concern is the degree of uncertainty with respect to the total
repairs which will actually be performed.
Answer: The Bid Schedule has been revised to reduce the quantity of point repairs
to reflect the known locations of likely point repairs, and Item #12 has
been added to the Bid Schedule entitled “Allowance for Additional Point
Repairs”. Add the following to Section 01150, MEASUREMENT AND
PAYMENT , PART 2 —- DESCRIPTION OF PAY ITEMS:
2019 CIPP Lining Project Addendum #1
Nashua, NH Page 1
