ITB_24_035 Addendum 3.pdf

Addendum Number 3

Invitation to Bid (“ITB”) 24-035

Lisa Lane Pond Rehabilitation Project

COMPLETE THIS ADDENDUM, SIGN and SUBMIT with the ITB

RESPONSE DUE DATE: January 17th, 2024, 2:00 p.m.

To All Prospective Offerors: In reference to the ITB listed above, the following changes are hereby incorporated into the ITB.

Question 1: When do you anticipate to issue NTP?

Answer 1: The NTP will be issued within 10 calendar days of the Purchase Order is issued.

Question 2: Are soil reports available?

Answer 2: No soil reports were completed for this project.

Question 3: What is the area and runoff coefficient for average conditions on basin flowing towards the pond via the 18” RCP and 48” CPP?

Answer 3: The total area draining to the pond is 58-acres. 17-acres is pavement while the remaining 41.0 acres is a mixture of grass/trees.

Question 4: Are there any utility conflicts known in the construction area?

Answer 4: There are no known utility conflicts in the construction area.

Question 5: Can the City provide profile sections of drainage pipe flowing from catch basin on Lisa Ln towards the pond?

Answer 5: Profile section of the existing 48” drainage pipe is shown on Sheet 08. The invert elevations are shown on Sheet 04 for both pipes including catch basins. No other information will be provided at this time.

Question 6: What is Line item “Sediment Removal 300 CY” exactly referring to? Is it the excavation material for entire pond?

Answer 6: The existing sediment from the pond will need to be removed and hauled off. This is near the outlet control structure and proposed rip-rap guide channel.

Question 7: What is line item “FOUND BKMILL MATL, TP II 80 CY” exactly referring to? Is it the foundation material underneath the wall’s bottom?

Answer 7: See Note 5 on Sheet 06. If soil is deemed unsuitable under the wall during excavation, Foundation Backfill material will be required.

Question 8: Is there any kind of testing for concrete or water?

Answer 8: Yes, Concrete testing for the wall will be required to meet GDOT specifications for Type

A Concrete.

Question 9: Will there be any kind of permit or environmental request needed to be performed by contractor?

Answer 9: No permit or environmental request is needed to be performed by contractor.

Question 10: Please clarify how far from the edge of the wall should the wall cap extend outwards.

Answer 10: The wall cap is for aesthetics and should be placed along entire length of exposed wall.

Question 11: What is the current estimated volume of water within the pond?

Answer 11: The required micropool/forebay is 5,020 cf.

Question 12: What is the average flow of water from the 48" CPP and 18" RCP towards the pond.

Answer 12: The drainage area of the pond is 58-acres. No average flow was measured, each time site visit, no runoff was flowing during dry conditions.

I hereby acknowledge receipt of Addendum Number 3 for #24-035 Lisa Lane Pond Rehabilitation Project and have incorporated the changes into my response for the above-mentioned Invitation to Bid.

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