Amendment No. A0003-W912DR-21-B-0007.pdf
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- Attached to
- W912DR21B0007 | Third High Reservoir Federal contract opportunity
- Solicitation number
- W912DR21B0007
About this file
This amendment modifies an invitation for bid for maintenance and improvements to the Third High Reservoir. Key changes include adding scope items to install a new drain line and air gap assembly chamber tied to the storm drain system, disconnect an existing drain line, demolish and install new valves and mixers in the reservoir, construct new influent and effluent buildings with associated features, and construct exterior edifice features and perimeter fencing. The amendment also modifies language around reservoir dewatering, concrete repair assessment and pricing, and updates drawings to reflect inlet and outlet labeling and alignments. The opportunity is solicited by the Department of the Army Corps of Engineers Baltimore District for maintenance and improvements to the Third High Reservoir located in Baltimore, Maryland.
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Text version
AMENDMENT NO. 0003 TO ADVERTISED IFB W912DR-21-B-0007
EFFECTIVE MARCH 05, 2021 PAGE 1 OF 3 PAGES
SPECIFICATIONS:
1. SECTION 01 92 10, Paragraph 1.5:
Update subparagraph b.1 to: “Install New Drain Line, Air Gap Assembly Chamber with tie into Storm Drain System, and Stairway system as indicated.”
Update subparagraph b.2 to: “Disconnect 24" Drain from DC Water after alerting appropriate parties.”
Update subparagraph c.5 to: “Clean up and appropriately handle waste and debris per section 01 74 19 CONSTRUCTION AND DEMOLITION WASTE
MANAGEMENT.”
Update subparagraph c.6 to: “Remove loose expansion joint material in the reservoir.”
Update subparagraph c.7 to: “Clean and apply hypolar tape system on expansion joint.”
Add subparagraph c.8 as: “Install mixer system in the reservoir.”
Add subparagraph c.9 as:
“Demolish and Install the following in the reservoir:
-2 36" Butterfly valves
-2 42" Butterfly valves
-1 24" Butterfly valve
-2 8" Mud valves
-Access ladders”
Add subparagraph c.10 as: “Clean site in preparation for Phase 3.”
Update subparagraph d.1 to:
“Construct new Influent and Effluent buildings, including:
-Electrical lights
-Security communications
-Fans and ventilation features
-Construction of architectural features
-Hatch Covers
-Pressure transducer installation
-Manual lifts:
Update subparagraph d.2 to: “Construct exterior edifice features and all work not related to piping and water. This item includes the installation of the perimeter fence.”
Update subparagraph d.3 to: “Clean interior of the reservoir and exterior, restore site to previous condition.”
Delete subparagraphs d.4 through d.5
2. SECTION 03 01 35, Paragraph 1.3:
Update second subparagraph, third sentence to: “Field survey shall be conducted after reservoir is removed from service.”
Update ninth subparagraph, second sentence to: “Contractors shall base bid on estimated quantities of each type of joint repair as defined on the Contract Drawings and on the Price Schedule and as specified herein.”
Add a third sentence to ninth subparagraph: “Any necessary concrete repair will be assessed after contract award with quantities and pricing determined at that time.”
DRAWINGS:
3. SHEET C-09 updates include:
a. Flow arrows have been added to the plan view.
4. SHEET C-11 updates include:
a. Section A has been updated to show “OUTLET” instead of “INLET”. It has also added “PROJECTED BACK” to the existing blow-off drain.
b. Plan View has been updated with the correct alignment of the Inlet and
Outlet (switched inlet from South side to North side) and the labels have been correct (INLET and OUTLET flipped).
GENERAL:
5. Pre-Proposal Site Visit: Attached for information only is the sign in sheet for the Pre-
Proposal Site Visit dated Feb. 23, 2021.
ATTACHMENTS:
1) Revised Specifications Section 01 92 10, dated MAR. 4, 2021
2) Revised Specifications Section 03 01 35, dated MAR. 4, 2021
3) Revised Drawing Sheet C-09, dated MAR 4, 2021
4) Revised Drawing Sheet C-11, dated MAR 4, 2021
5) February 23, 2021 Prospective Bidders Sign-in Sheet
6) Attachment C – Standard Form LLL
7) Attachment D – Certificate of Corporate Authority Form
8) Attachment E – EFT Form
File details come from the government source that posted it. Updated .