Attachment 4 - Contractor Questions and Government Answers.pdf

Cahokia Heights Sanitary Sewer Trunkline

Contractor Questions & Government Answers

1. Are there videos available on the project?

ANSWER: No.

2. Do you have a table with the segments to be lines with the manhole depths available that you can send us?

ANSWER: The requested information is included on pages 4-8 of the provided plans.

3. Is there any flow data available?

ANSWER: No flow data has been obtained. Flows should be assumed based off of current utilities outlined on the plan sheets.

4. Will the city locate and uncover the buried manholes on the project?

ANSWER: Yes, the city will locate and uncover currently buried manholes. Manholes C1-1 #3, C1-1 #4, C2-2 #3, C2-2 #7, C2-2 #13, and C4-2 #2 are known to be buried. Locating and uncovering efforts is underway for these manholes.

5. The line segment from MH C1-4 #11 to C1-4 #12 is called out as (3) 18” lines, is it the intent for these lines to be rehabbed by CIPP? If so, will a bid item be added to include the 18” diameter lines?

ANSWER: Yes, the 18” lines are to be rehabbed by CIPP. CLINs for ‘Clean & Televise 18” Sewer’ and ‘Install 18” CIPP Liner’ have been added to the Bid Schedule. CLINs for ‘Clean & Televise 30” Sewer’ and ‘Install 30” CIPP Liner’ have been adjusted accordingly. Note* The (3) 18” lines run from MH C1-4 #10 to C1-4 #11.

6. Can a drawing of the 18” lines, manholes C1-4 #11 and C1-4 #12 be provided to the contractor?

ANSWER: The 18” lines with details are noted on pg. 5 of the plans.

7. On our site visit we could not access manholes C1-4 #14, C1-4 #13, C1-4 #12, C1-4 #11 will the city provide a clear access path to these manholes?

ANSWER: All necessary construction easements have been obtained. A city contact will be provided upon award to assist with outlining easements.

8. On our site visit, homeowner would not answer the door for us to ask permission to look at manhole C1-4 #10, can the city assist with this?

ANSWER: See answer to question 7.

9. There are multiple pump stations on the project can any of these be shut off and if so, how long can they remain off?

ANSWER: Contractor shall make effort to maintain service usage for the duration of the project. Bypass requirements are outlined in Section 02400 of Specifications. If it is determined that shutoff is unavoidable after making efforts, contractor will need to follow guidance provided in specification section 02735. The maximum amount of time of no service shall be 12 hours.

10. I did not see on the plans where the existing pipe material is listed, can this be provided?

ANSWER: The majority of existing pipe is believed to be concrete. Contractor may encounter previously repaired areas of PVC pipe. Exact material of existing pipe shall be confirmed while performing preparatory procedures outlined in specification 02735 for all sections of pipe to be repaired.

11. Is the segment from manhole C4-2 #1 to the diversion lift station on sheet 7 that is 15ft long supposed to be rehabbed?

ANSWER: Yes.

12. 5 existing manholes are not readily accessible or uncovered [probably buried], and not yet located – Is the City of Cahokia to locate and uncover for Contractor’s access or is the Contractor required to locate ??

ANSWER: See answer to question 4.

13. Easements in the back yards by the RR tracks on St. Barbara - are easements provided for the

Contractor / how is access provided / recommended?

ANSWER: See answer to question 7.

14. Existing 30” pipe transitions to 3 - 18” pipes going underneath the railroad tracks – what is the existing 18” pipe material [vcp, ductile iron, cast iron, etc. ??]

ANSWER: See answer to question 10.

15. Existing 30” pipe transitions to 24” on Jerome by the pump station - – what is the existing 24” pipe material [vcp, ductile iron, cast iron, etc. ??]

ANSWER: See answer to question 10.

16. At the 18” lines that run under the train tracks - are those to be CIPP lined?

a. bid tab doesn’t include 18” CIPP – FYI

ANSWER: Yes, 18” lines are to be CIPP lined. Bid Schedule has been updated accordingly.

17. Can there be an Hourly Rate Line Item added for Heavy Cleaning?

ANSWER: No

18. Can the owner provide a location for the debris removed from the sewer during the pre-cleaning operations?

ANSWER: Yes. See answer to question 19.

19. If required to dispose the debris at the landfill can the owner provide some locations to set a roll off dumpsters at? Also, can that location be next to a sanitary sewer MH to allow the water to drain from the dumpster into the sewer?

ANSWER: Solid Waste, Debris, and Hazardous Waste operations shall comply with specification 01 11 30. The city will provide a staging area for temporary storage of roll offs.

20. Has a Waste Profile been completed on the debris in the sewer? If not, will this be the contractor’s responsibility or will this be done by the owner before start of the project?

ANSWER: A Waste Profile has not been completed. If required, the Contractor will be responsible for completing a Waste Profile.

21. Can you confirm all MH’s will be located and exposed prior to construction?

a. If not, can a Buried MH Locate Line Item be added to the bid sheet?

ANSWER: See answer to question 4.

22. Are all hydrants within the construction boundary owned by the City of Cahokia Heights and will be accessible?

ANSWER: Yes, all hydrants within the construction boundary are owned by the City of Cahokia Heights and can be accessed. Usage shall be coordinated with the city upon award.