Amendment 0001 Specs W9128F21B0022.pdf
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- Attached to
- W9128F21B0022 - Replacement subsurface drainage system in the 115kV and 230kV Oahe SD Switchyard
- Solicitation number
- 7987
About this file
This amendment modifies the specifications and drawings for an invitation for bids to replace the subsurface drainage system at the Oahe Dam Switchyard in South Dakota. The work requires removal of the existing drainage system and installation of new perforated and solid schedule 80 PVC pipe, including pipe casing under roadways, aggregate bedding and cover materials, and new gate valves. Bids are due by 2:00pm on September 16, 2021 from companies able to perform the work while protecting nearby electrical components, utilities, and structures. The U.S. Army Corps of Engineers District Office in Omaha, Nebraska issued the solicitation and amendment.
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Am #0001 - 2 (Continuation of SF 30)
27 Aug 2021 Solicitation No. W9128F21B0022
Date of Issue: 17 Aug 2021 Date of Opening: 16 Sep 2021
SUBJECT: Amendment No. 0001 to Specifications and Drawings for Construction of Switch Yard Drain Tile Replacement Oahe Dam South Dakota.
TO: Prospective Bidders and Others Concerned
1. The specifications and drawings for subject project are hereby modified as follows (revise all specification indices, attachment lists, and drawing indices accordingly).
a. Specifications. (Descriptive Changes.)
(1) Section 33 46 16 Page 5, paragraph 2.1.1.1
Delete “DR 23.5 will be the required wall thickness in accordance with ASTM D3034,ASTM F949 or ASTM F758, Type PS 46.”
Substitute “Provide schedule 80 PVC pipe that adheres to ASTM D1785”
b. Drawings (Reissued). The following drawings are revised with latest revision date of 27 August 2021, and reissued with this amendment.
(1) Sheet CS501.
2. This amendment is a part of the bidding papers and its receipt shall be acknowledged. All other conditions and requirements of the specifications remain unchanged.
a. See Section 00 21 00, paragraph: Instructions to Bidders, on how to submit electronic bids.
3. Electric bids will be received until 2:00 p.m., local time at place of bid opening, 16 Sep 2021.
Attachments:
Dwgs. listed in 1.b. above
U.S. Army Engineer District, Omaha Corps of Engineers 1616 Capitol Avenue Omaha, Nebraska 68102-4901
27 August 2021
JAC/[2100]
(1) Section 33 46 16 Page 5, paragraph 2.1.1.1
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