Bulkhead Replacement Project
Barnstable Inner Harbor
Barnstable, Massachusetts
Addendum No. 1
Issued: January 18, 2010
This Addendum forms part of the Contract Documents and modifies the original Plans
and Specifications dated December, 2009, as noted below. Bidders shall acknowledge
receipt of this Addendum in the space provided on the bid form. Failure to do so may
subject the Bidder to disqualification.
This Addendum consists of twelve (12) pages including the attached Sketches 1 through
3 and Figures 1 through 5.
1. The Bid Opening date, time and place shall remain the same.
2. The following items were discussed during the Pre-Bid Conference held on January
12, 2010:
A. PZC 14 sheet piling is an acceptable alternative to AZ 14 sheet piling.
B. The allowable work hours for this project are 7am to 7pm, Monday through
Friday. Work outside of the allowed hours may be possible on a limited basis
but will require prior approval from the Town.
C. The Order of Conditions issued for this project has been revised to remove the
requirement that work be performed between October 15 and May 1.
D. The ACOE Category 2 Permit authorization for the work will be renewed in
accordance with the issuance of a new Programmatic General Permit. No
substantive changes to the permit conditions are expected.
E. The use of a cofferdam has been permitted as part of this project but its use is
not required.
F. The portion of the marina located along the east side of Barnstable Harbor
(adjacent to the bulkhead) will be inactive during the project and the floats will
not be installed. Guide piles for the finger floats will remain in place. The
portion of the marina located along the west side of Barnstable Harbor will
remain in operation during the project.
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G. The Town’s jersey barriers currently in use at the site may be used for traffic
control provided that they are not damaged and that they remain the property
of the Town.
H. A building permit will be required from the Town and the fee will not be
waived.
I.
Galvanized hardware suitable for use with ACQ treated wood can be used in
accordance with the contract documents.
J.
Timber blocking between the bulkhead and fender piles is to be 12 inches in
length.
K. The steel gangway platform is located in the vicinity of Station 2+14. The timber
gangway ledger is located in the vicinity of Station 0+46.
L. The sheet pile bulkhead is to be installed following straight lines and in keeping
with the original layout of the existing structure. Allowable sheet pile location
shall be determined from the installed line of the existing bulkhead, not the
present location of displaced sections.
M. Fender piles are to be located at belly-out sections of bulkhead in keeping with
the general locations shown on the project drawings and as directed by the
Engineer.
3. The following items are provided in response to questions submitted by prospective
bidders:
A. Police details are considered incidental to the work and the cost for police
details shall be borne by the Contractor.
B. Coating of the sheet pile deadman and deadman wale is not required. Tie rods
shall be coated in accordance with the contract documents. Sheet pile bulkhead
and bulkhead wale shall be coated in accordance with the contract documents.
C. The area between the bulkhead and the bioretention area at the southern end of
the site is considered part of the work area. Public access to this area may be
restricted by the Contractor.
D. Cold-rolled steel sheet piles do not meet the requirements of the contract
documents.
E. The water service shall be installed four (4) feet below grade.
F. New timber fender piles shall be a minimum of 35 feet long prior to cut-off.
G. The filling of wetlands and waterways is not permitted. Contractor is
responsible for compliance with all applicable permits and regulations.
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H. Application of reflectorized beads is not required for pavement markings.
Marking paint shall be provided and installed in accordance with the contract
documents.
I.
A request was made for available soils information. Please see Figure 1, Boring
Location Plan and Figure 2, Boring Log regarding the soils located behind the
existing steel bulkhead section. This information has not been verified and is not
intended to represent actual field conditions but is provided as reference only.
J.
A request was made for available information regarding the tieback systems for
the existing bulkheads. Please see Figure 3, Steel Bulkhead Profile; Figure 4,
Timber Bulkhead Profile and Figure 5, Timber Bulkhead Plan. This information
has not been verified and is not intended to represent actual field conditions but
is provided as reference only.
4. SHEET 2 OF 8, SITE LAYOUT AND BULKHEAD REPLACEMENT PLAN and
Section 15400 Paragraph 2.04: The meter pit housing the backflow preventer is
eliminated. The backflow preventer shall be housed in a Hot Box LB2T Fiberglass
Flip-Top Enclosure or approved equal mounted on a concrete slab in accordance
with the manufacturer’s recommendations.
5. SHEET 4 OF 8, TYPICAL STEEL SHEETPILE BULKHEAD SECTIONS AND
CORNER LAYOUT PLAN: FENDER PILE CONNECTION detail is deleted and
replaced with the FENDER PILE CONNECTION detail on Sketch 3.
6. SHEET 5 OF 8, TYPICAL SITE DETAILS: TYPICAL PAVEMENT JOINTING detail
incorrectly refers to the NEW GRAVEL BASE COURSE as NEW GRAVEL
SUBBASE. A new gravel base course 12 inches thick shall be installed immediately
below new bituminous concrete pavement in accordance with TYPICAL
PAVEMENT SECTION detail found on the same sheet.
7. SHEET 6 OF 8, TYPICAL BULKHEAD DETAILS:
A. WALE CONNECTION detail is deleted.
B. TIE RODS detail is deleted and replaced with the TIE RODS detail on Sketch 2
and the BULKHEAD TIEROD CONNECTION detail, DEADMAN TIEROD
CONNECTION detail, WALE CONSTRUCTION detail and BULKHEAD WALE
CONNECTION detail on Sketch 1.
8. Section 02740, Paragraph 2.01A(1): The text of this paragraph shall be deleted in its
entirety and replaced with the text “Materials shall conform to MHD Specifications
Section M1.03.1, Processed Gravel for Subbase.”
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9. An overhead wire not shown on the project plans crosses the bulkhead in the
vicinity of Station 0+10. This wire will be removed or relocated by the Town prior to
the start of construction.
END OF ADDENDUM NO. 1
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Figure 1
Boring Location Plan
Figure 2
Boring Log
Figure 3
Steel Bulkhead Profile
Figure 4
Timber Bulkhead Profile
Figure 5
Timber Bulkhead Plan