Winchester Dam Addendum 4.pdf

DTMB-0414 (Rev 6/25)

DEPARTMENT OF TECHNOLOGY, MANAGEMENT AND

BUDGET

State Facilities Administration Design & Construction Division

CONSTRUCTION BID ADDENDUM NO. 4

This form identifies an Addendum to Bidding Documents, and incorporates interpretations or clarifications, modifications, acceptance of proposed “or equal” materials, and other information into the Bidding Documents. Addenda will be numbered by the Professional and distributed through www.michigan.gov/SIGMAVSS as an attachment.

TO:

ALL BIDDERS

DATE ISSUED

8/13/2026

PROJECT NAME

Mecosta County SGA Dams – Winchester Dam Rehabilitation 4754 Harding Rd Barryton, MI

FILE NUMBER

751/24256.DPL

PROFESSIONAL

GEI Consultants of Michigan, P.C.

PROJECT DIRECTOR

David Lenz

BID OPENING DATE:

8/19/2026

ADDENDUM ITEMS: 1. Question Responses

All Bidders submitting a Bid on the above Contract shall carefully read this Addendum and give it consideration in the preparation of their Bid.

Contractor shall list all addenda on the Bid Form to ensure conformity in the bid.

Drawings, Specifications and/or Proposals are herein amended, expanded and/or modified, as hereinafter described, and become a part of the Contract Documents with same force and affect as if incorporated, therein, originally. Any contrary provisions contained, or referred to, in Drawings and/or Specifications, shall remain applicable unless overridden by this Addendum. Revised or contrary provisions herein shall not affect any other part of Contract Documents and any deletions, additions, substitutions and/or revisions mentioned, shall include all labor, materials, methods, modifications, etc. required for complete performance of the work.

The following are revisions to the Bidding and Contract Requirements:

GENERAL:

1. Note to Bidders: Interview of Bidders after bid opening will occur on

Thursday August 20, 2026.

2. Question List

DRAWINGS:

1. N/A

PROJECT MANUAL:

ADDITIONAL KEY INFORMATION:

http://www.michigan.gov/SIGMAVSS

Bidder shall acknowledge receipt of this Addendum at the bottom of the Bid Summary form to be submitted as part of the greater bid.

ACKNOWLEDGEMENT: This Addendum must be acknowledged by the Bidder in the space provided in the Bid Summary and Bid Form. Failing to acknowledge Addenda may be cause for the Bid to be rejected. Addenda will become part of the Contract Documents.

PROFESSIONAL: DATE: 8/13/2026

APPROVED BY:

PROJECT DIRECTOR: DATE:

Winchester Dam Rehabilitation - Question Responses

ITEM DOCUMENT SECTION NAME/ COMPANY COMMENT RESPONSE

Column1 Column12 Column13 Column14 Column2 Column3

0014 General N/A Brett Fales - Fisher I am requesting an official extension on the Winchester Dam project RFP. Looking for at least 2-4 weeks.

Due to timing to meet the supplemental state add board meeting an extension cannot be granted. Construction funding needs to be encumbered before the end of 2026.

0015 Specifications Brett Fales - Fisher There are several items on the bid form with a “0” quantity. Are these items strictly just unit prices?

Yes.

0016 Specifications Brett Fales - Fisher “AC” is listed as a unit on the bid form for “Site Restoration” , confirm this is an abbreviation for Acre?

Yes.

0017 Drawings Brett Fales - Fisher

C-100 shows MDOT Heavy Rip Rap both upstream on the embankment, and directly downstream of the spillway, not including the proposed Auxiliary

Spillway. Sheet C-300 shows the same areas downstream as MDOT Plain. Please clarify which Rip Rap is correct for embankments and for the auxiliary spillway.

Assume all riprap is MDOT heavy.

0018 Drawings Brett Fales - Fisher C-100 mentions 6” DIA perforated HDPE, but subdrainage details on C-210 show

8” DIA. Which is correct for pay item “Perforated Drain Pipe”.

8-inch diameter.

0019 Specifications Brett Fales - Fisher What material is to be utilized for “coarse drainage stone” MDOT 29A.

0020 Specifications Brett Fales - Fisher Subdrainage specification mentions backflow prevention, will this be required for the proposed toe drain?

Assume one backflow preventer on each toe drain.

0021 Drawings Scott Kenney -

Anlaan

Please provide existing Stop Log drawings or the make and model of the existing

Stop logs; or provide a detail & specification on the Stop Log seals to be replaced.

Drawings/specifications for the exisiting aluminum stoplogs are not available at this time.

0022 Drawings Jim Spradlin -

Spence Brothers

We have been working on the estimate for the Winchester Dam Rehab project, and after several interactions with the potential earthwork contractors, they have requested more time to pull together their bids. Mark Hickey, the sole-sourced and specified contractor for the stoplog reshaping/sealing/locking scope of work, also has expressed needing additional time to complete his estimate for the general contractors. Would it be possible to issue a bid extension of (4) business days to

August 25th?

Drawings/specifications for the exisiting aluminum stoplogs are not available at this time.

Due to timing to meet the supplemental state add board meeting an extension cannot be granted. Construction funding needs to be encumbered before the end of 2026.

0023 Drawings Scott Kenney -

Anlaan

Conflicting info on Reinforcment. One note says Epoxy Coated. The other note says Wall and Slab dowels to be uncoated. Does this mean the wall dowel verts for the stem walls for the weir are plain and the rest is epoxy coated?

All auxillary spillways rebar shall be uncoated.

0024 Drawings Scott Kenney -

Anlaan

Do the stem walls go all the way around the 4 sides of the weir or is it 2 sided?

They pay item of 67 Cyds for that portion isn’t matching up to anything for that matter.

2 sided. Update pay item qnty to 155 cy.