Amendment_0001 _W9128F-16-R-0020.pdf

Am #0001 - 1

DEPARTMENT OF THE ARMY

Omaha District, Corps of Engineers 1616 Capitol Avenue Omaha, Nebraska 68102-4901

:NOTICE: Failure to acknowledge : Solicitation No. W9128F 16 B 0020 :all amendments may cause rejec- :

:tion of the bid. See FAR : Date of Issue: 19 Feb 2016 :52.214-3 of Section 00 21 00 : Date of Opening: 23 March 2016

Amendment No. 0001 17 March 2016

SUBJECT: Amendment No. 0001 to Specifications and Drawings for Construction of Powerhouse West Terrace Drain Rehab, Phase II, Garrison Dam, ND Solicitation No. W9128F 16 B 0020.

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 00 21 00 Page 14, delete paragraph 1.18 TAXES - STATE OF SOUTH DAKOTA, and substitute “NOT USED.”

(2) Section 00 22 00 Page 11, paragraph 11.2, second subparagraph, delete

“The Offeror shall provide contact information and questionnaires for the past performance of three projects within the past five years of medium voltage cable replacements. The contact information will be used at the option of the source selection team to aid in the determination of past performance.”

And substitute the following:

"The Offeror shall provide contact information and questionnaires for the past performance of three projects within the past five years of similar work and complexity."

(3) Section 33 26 00, add the West Abutment Sand Boring Coordinates attachment and the West Abutment Sand Piezometer Reading attachment to the end of the section.

2. This amendment is a part of the bidding papers and its receipt shall be acknowledged on the Standard Form 1442. All other conditions and requirements of the specifications remain unchanged. If the bids have been mailed prior to receiving this amendment, you will notify the office where bids are opened, in the specified manner, immediately of its receipt and of any changes in your bid occasioned thereby.

a. Hand-Carried Bids shall be delivered to the U.S. Army Corps of Engineers, Omaha District, Contracting Division, 1616 Capitol Avenue, Omaha, Nebraska 68102-4901.

Am #0001 - 2

b. Mailed Bids shall be addressed as noted in Item 8 on Page 00 10 00-1 of Standard Form 1442.

3. Bids will be received until 2:00 p.m., local time at place of bid opening, 23 March 2016.

Attachments: Spec Attachments listed in 1.a. above Q&A dated 17 March 2016 – For Information Only

U.S. Army Engineer District, Omaha Corps of Engineers 1616 Capitol Avenue Omaha, Nebraska 68102-4901

17 Mar 2016

MFS/2184

West Abutment Sand Boring Coordinates

Boring/PZ number Northing (ft) Easting (ft) 55 671441.49 1737866.19 58 671894.13 1736764.39 59 671317.88 1737240.94 74 672088.72 1735753.76 75 672485.66 1735264.71 76 672722.68 1734913 77 673101.67 1734318.13 90 671111.72 1737896.5

455 672195.35 1737323.29 456 671829.49 1737291.24 544 672286.49 1738017.18 609 672264.14 1737628.37 610 671676.96 1737639.33 611 671708.52 1738152.93 614 671287.64 1737641.58 630 672448.55 1736771.93 631 672501.43 1736235.06 632 672297.97 1735576.27 633 671490.14 1737223.87 635 671653.5 1736634.35 702 671410.85 1738057.8 704 671514.73 1738057.8 708 671459.04 1738268.65 709 671457.26 1737918.74 710 671708.52 1737909.92 711 672015.58 1737991.89 712 672025.73 1737643.8 746 671249.51 1738054.03 747 672526.18 1737646.84 748 672510.4 1737348.66 750 673121.07 1737526.27 751 671483.92 1738028.29 773 671207.43 1737938.44 774 672510.4 1737876.71 842 671036.51 1737265.82 843 670714.06 1737237.13 864 671641.76 1737936.61

P-13-1 672325.249 1736374.155 P-13-2 672597.277 1737093.563 P-13-3 671636.929 1736960.496 P-13-4 671903.796 1737465.746 P-13-5 672240.769 1735003.797 P-13-8 671395.173 1737692.034

P-72-12 671384.12 1737813.27 P-72-13 671316.53 1738286.22 P-80-5 671535.56 1737698.01

West Abutment Sand Boring Coordinates

P-88-5 671301.9 1738379.72 P-125 671879.053 1735283.561 P-130 671332.4 1737371.94 P-131 671520.44 1737836.31 P-135 671478.7 1738218.52

West Abutment Sand Piezometer Readings

16-Feb-16

PW 14-2 1798.86

PZ 14-2 (5') 1798.92

PZ 14-2 (10') 1798.96

PZ 14-2 (15') 1799.03

P-14-4 1791.59 P-14-5 1769.73

20-Jan-16 P-130 1799.5 P-131 1784.2 P13-1 1829.24 P13-2 1832.03 P13-3 1976.344 P13-4 1804.88 P13-8 1766.8 P-135 1772.9 P-72-12 1778.6 P-72-13 1753.5 P-80-5 1789 P-88-5 1745.9

Q & A Page 1 For Information Only

Powerhouse West Terrace Drain Rehab, Phase II Garrison Dam, ND

Questions and Answers

17 March 2016

1) Section 00 21 00, Pg. 14 Paragraph 1.18 is titled “Taxes – State of South Dakota”. Please advise if this section will be revised to reflect State of North Dakota tax requirements.

A- Reference to South Dakota has been removed, see Amendment 0001.

2) Section 00 22 00, Pg. 12 Paragraph 11.2 includes a requirement for past performance of three projects within the past five years of medium voltage cable requirements. ECI understands that there is no medium voltage cable replacement on this job. Please advise if this requirement will be removed.

A- The paragraph has been corrected, see Amendment 0001

3) Section 00 22 00, Pg. 9 Paragraph 9.2 discusses dewatering plan submittal requirements, but does not discuss shoring or excavation plan requirement. Paragraph 9.3.c states “Technical soundness of approach for all aspects of construction (especially dewatering and shoring). Please advise if a specific shoring and excavation plan, similar to the dewatering plan, is required as part of the Technical Approach submittal requirements.

A- Shoring and excavation design are not required as part of the proposal package. A detailed work plan and shoring plan will be required in accordance with specification section 02 31 60 following contract award. Offerors should ensure that the proposal package contains enough information regarding any grading, excavation, shoring, or ancillary work as it pertains to design, construction, and operation of the dewatering system to demonstrate the Offeror’s understanding of the project.

4) During the Pre-Bid Meeting attended by ECI, the availability of additional piezometer readings and ground water data was discussed. ECI is requesting this information to assist in development of dewatering plan that is as thorough as possible. Please advise if this information will be provided in an addendum, alternatively, please provide direction for where this information can be accessed.

A- The most recent water level readings for the west abutment sand piezometers identified on advertisement drawing B1.02 are included in Amendment 0001 to assist with dewatering plan development. Note that the west abutment piezometric levels do show minor fluctuations with pool;

however readings remain consistent with those on sheet B1.02 and are therefore not anticipated to alter design conditions/considerations from those assumed/provided on the advertisement drawings.

5) Contract Drawings Sheet No. B1.02, General Note 7 states that “Location of additional table II borings not shown on this plan sheet are available upon request”. ECI is requesting to be provided with the stated additional borings.

A- The additional borings referenced in Note 7 on sheet B1.02 are outside the work area but were used to develop the interpreted west abutment sand surface; the location of all Table II borings provided on sheet B1.02 have been included in Amendment 0001.