Amendment 0005.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

Solicitation Number W912HN-10-B-0018, entitled Fish Passage at Lock and Dam No. 1, Cape Fear River, Bladen County, North Carolina is amended as follow s:

1. The Time and Date for Bid Opening remains unchanged.

2. See Summary of Changes.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 2

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY 09-Aug-2010

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X W912HN-10-B-0018

X 9B. DATED (SEE ITEM 11)

15-Jul-2010

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

09-Aug-2010

CODE

U S ARMY CORPS OF ENGINEERS

WILMINGTON DISTRICT

ATTN: DANNY KISSAM

69 DARLINGTON AVE

WILMINGTON NC 28403-1343

W912HN 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912HN-10-B-0018

SECTION 32 22 13.38 - STONE

Delete existing Page 7 through Page 12 in their entirety and replace with revised enclosed like-number Pages.

NOTE:

Text that is added or revised by this amendment is replaced in its entirety and underlined and/or printed in bold and/or stamped appropriately.

The text changes may have necessitated reformatting of subsequent text or pages. If this is the case, those pages have also been issued as amended pages but are not underlined or bold text.

DRAWINGS: Pen and Ink changes:

Plate D-19 revise Note 1 to read as follows:

“1. Weir Stone sizes range from 3.5 tons to 6.5 tons with 50% of the stones exceeding 4.5 tons. One edge dimension of each weir stone is to be between 2.5 feet and 4.0 feet. Weir stone shape and proportions are as described in Specification 32 22 13.38 STONE, subparagraph Weir Stone, as revised.“

Plate S-01 Retaining Wall Plan And Elevation revise as follows:

Delete ' 73.50" ' dimension shown from anchor wall to front wall.

Plate S-03 revise Notes 4 and 8 as follows:

“4. Steel Channel Material for Walers shall meet requirements of ASTM A572, Grade

50. Tierods shall meet requirements of ASTM A572-07, Grade 50. Tierods shall be three inch (3”) nominal diameter, and shall have a minimum of one (1) turnbuckle or coupling sleeve having a minimum takeup length of six (6”) inches.

Turnbuckles are to be galvanized, plated, electro-polished and shall meet requirements of ASTM F1145-92. The minimum reach for each threaded connection shall be the diameter of the tierod.”

“8. Tierods are to be constructed with a minimum of one (1) connection turnbuckle or one (1) coupling sleeve. All tierods shall be of the nominal diameters shown.

Straight rods are to be oversized to compensate for threading cut depths.

Tierods may also have upset ends but shall be of the nominal diameter throughout the reduced section.”

-- End of Summary of Changes --

Encls (As stated)

Fish Passage at Lock and Dam No. 1 W912HN-10-B-0018 Cape Fear River, Bladen County, North Carolina from porous structure. The stone shall be furnished in random sizes ranging in weight as indicated in subparagraph Stone Size and Gradations noted elsewhere in Section 2.1.

2.1.2 Limestone

Underlayer stone may be either granite/gneiss or it may be limestone. If granite underlayer material is used, material shall meet requirements noted in Section 2.1.1 Granite/Gneiss. If limestone underlayer material is used, stone shall be sound, tough, dense, resistant to the action of air and water, and suitable in all other respects for the purpose intended. The stone shall be furnished in random sizes ranging in weight as indicated in subparagraph Stone Size and Gradations noted elsewhere under Section 2.1.

Limestone underlayer stone shall be tested in accordance with requirements of NCDOT Standard Specifications 2006, Section 1042-3, Sections 1005-4(E) Resistance to Abrasion, and 1005-4(F) Soundness. Satisfactory resistance to abrasion will be considered to be a percentage of wear of not greater than 55 percent. Satisfactory soundness will be considered to be a loss in weight of not greater than 15 percent when subjected to 5 alterations of the soundness test.

2.1.3 Armor Stone

Stone shall consist of fresh, sound, hard, dense, durable, crystalline igneous or metamorphic rock which shall be separated from bedrock by quarrying. The stone shall be of such quality that the individual stone integrity and permanence within the structure is assured under all conditions to which it is subjected. The unit weight, saturated surface dry (SSD), of the stone shall not be less than 160 pounds per cubic foot and the specific gravity not less than 2.58. The stone shall be free from open or incipient cracks, seams, fissures and structural planes of weakness, and from component minerals cementing and bonding materials which might contribute to spalling or breakdown from handling and placing, from wave action and/or from chemical action by water or air. The stone shall be furnished in blocky and angular shapes. Flat stones, tabular stones, slabs, boulders and parts of boulders will be rejected. No stone will be permitted which has a longest dimension that is three times (3x) or greater, than its least dimension. Not more than 2 percent by weight of clean spalls resulting from loading and shipment will be allowed in any one barge, carload, or truckload to be offloaded at the work site. The stone shall be furnished in sizes as indicated in subparagraph, Stone Size and Gradations.

2.1.4 Class B Underlayer Stone

Two stone material alternates will be considered for use on the project as underlayer backfill material. Only one of the stone types will be used as underlayer material on the project. Underlayer stone will be either (1) granite/gneiss in accordance with subparagraph Granite/Gneiss, or (2) material may also be a quarried limestone in accordance with subparagraph

2.1.2. Limestone. Underlayer stone material shall meet locally accepted requirements for NCDOT Class B Riprap.

2.1.5 Weir Stone

Weir stone shall be granite/gneiss in accordance with subparagraph Granite/Gneiss. Weir stone shall be of such quality that the individual stone integrity and permanence with the structure is assured under all conditions to which it is subjected. The stone shall consist of fresh, sound, hard, dense, durable, crystalline igneous or metamorphic rock that

SECTION 32 22 13.38 Page 7 (Revised by Amendment No. 0005) shall be separated from bedrock by quarrying. The unit weight, saturated surface dry (SSD), of the stone shall not be less than 160 pounds per cubic foot and the specific gravity not less than 2.58. The stone shall be free from open or incipient cracks, seams, fissures and structural planes of weakness, and from component minerals cementing and bonding materials, which might contribute, to spalling or breakdown from handling and placing, from wave action and/or from chemical action by water or air. Stone shall be furnished uncut, in somewhat blocky or irregular natural-appearing shapes with at least one (1) edge generally flat. Weir stones shall have an installed height of between 2.5 feet and 4.0 feet. The longest edge dimension will be a maximum of three times (3x) greater than its least dimension. Not more than 2 percent by weight of clean spalls resulting from loading and shipment will be allowed in any one barge, carload, or truckload to be offloaded at the work site. The stone shall be furnished in sizes as indicated in subparagraph, Stone Size and Gradations.

2.1.6 "Pool" Chinking Stone

"Pool" Chinking Stone shall be a granite/gneiss stone as described in accordance with subparagraph Granite/Gneiss. Pool Chinking Stone shall meet requirements for NCDOT Class A Riprap.

2.1.7 Stone Size and Gradations

2.1.7.1 Weir Stone

For the granite weir stone, the specified weight range shall be from 3.5 to

6.5 tons with 50% of the stone weighing more than 9,500 pounds. Weir stone shape and proportions are as described in subparagraph Weir Stone.

2.1.7.2 Armor Stone

For the granite armor stone, the specified weight range shall be 400 to 2,100 pounds each with 50% of the stone weighing more than 1,070 pounds.

2.1.7.3 NCDOT Class B Rip Rap Underlayer Stone

Class B underlayer stone shall be NCDOT Class B with a range of 5 to 12 inches. The size of an individual stone particle will be determined by measuring its long dimension. No more than 5.0% of the material furnished can be less than the minimum size specified nor no more than 10.0% of the material can exceed the maximum size specified. Stone for riprap shall meet the requirements of NCDOT Table 1042-1 for the class and size distribution.

2.1.7.4 NCDOT Class A Riprap "Pool" Chinking Stone

"Pool" Chinking Stone shall meet requirements of NCDOT Class A Riprap and shall have a size range of between 2 to 6 inches and a midrange size of 4 inches. No more than 5.0% of the material furnished can be less than the minimum size specified nor no more than 10.0% of the material can exceed the maximum size specified.

2.1.8 Stone Sources

The sources from which the Contractor proposes to obtain stone materials as required for the features in these specifications shall be selected and identified to the Contracting Officer well in advance of the time when the materials will be required in the work, but no less in advance than 20

SECTION 32 22 13.38 Page 8 days. Contractors may select a quarry approved for coarse aggregate production by the North Carolina Department of Transportation (NCDOT). The approved NCDOT producer/supplier list for coarse aggregate is provided at the following internet location:

https://apps.dot.state.nc.us/vendor/approvedproducts/Producer.aspx

If a proposed stone source is a quarry not listed on the NCDOT producer/supplier list, the selected quarry may still be utilized as a stone source if approved following Corps review. Corps review is to include the quarry being inspected by a Corps geologist, testing performed on the rock material, review of supply capability, and material documentation of use on similar projects. If review information meets projects criteria needs, material from the quarry will be approved.

2.1.9 Stone Not Meeting The Specifications

If, during the progress of the work, it is found that the stone being furnished and/or placed by the Contractor does not meet all the requirements of the specifications, the Contractor shall be required to furnish other stone of a quality acceptable to the Contracting Officer. Any stone rejected at the site of work as not meeting the requirements of these specifications for quality, condition, size, or otherwise, shall be removed from the site by and at the expense of the Contractor. All stones which are broken during shipment to the work site or during placement shall be rejected. The Contractor shall dispose of all rejected stone in a manner approved by the Contracting Officer.

PART 3 EXECUTION

3.1 FOUNDATION PREPARATION

The east shoreline rip rap bank protection on which geotextiles are to be placed shall be compacted and graded to provide a relatively smooth surface condition free from obstruction, debris, depressions, erosion features or vegetation. Depressions and eroded areas shall be brought to grade by filling and compacting with earth material similar to the adjacent material. No additional payment will be made for any material thus required. Immediately prior to placing the geotextile, the prepared base will be reviewed by the contracting Officer and no geotextile shall be placed thereon until after the area has been approved. Geotextiles shall be placed as shown on the drawings and in accordance with Section 31 05 22 GEOTEXTILES USED AS FILTERS, before any placement of stone.

3.2 INSTALLATION OF GEOTEXTILE

The placement of geotextile shall be in accordance with the requirements of Section 31 05 22 GEOTEXTILE USED AS FILTERS, paragraph, INSTALLATION OF THE

GEOTEXTILE.

3.3 PLACEMENT OF STONE

3.3.1 General

The contractor shall prepare and submit a Placement Plan showing his proposed method of construction, to include the method of placement and equipment to be used to the Contracting Officer for approval. Care shall be taken to place the stone of various classifications so that they will form a compact mass, and form as nearly as practicable a cross-section of

SECTION 32 22 13.38 Page 9 the height, width, and slopes as shown on the contract drawings. All stones shall be carefully placed so as to leave no large voids between them.

Special care shall be taken during placement of stone over and in close proximity to existing or proposed structures. During placement of stone over the downslope of the dam, each stone in each layer shall be lowered to rest before being released.

3.3.2 Minor Adjustments

Since the water depths shown on the drawings are subject to change by currents, the Contracting Officer may make minor alterations in the plan limits, dimensions, slopes, and thickness of the slope protection to meet the conditions at the time of construction. No separate payment or adjustment in the unit price will be made as a result of these changes since the cost will be covered by payment for the total quantity of riprap stone, underlayer stone and armor stone placed at the contract price unit price.

3.3.3 Tolerances

Stone placed beyond the specified tolerances given will not be paid for.

Each layer shall be placed to the lines and grades shown on the drawings.

The various sizes and shapes shall be distributed such that satisfactory interlocking of the stones will be obtained. Contractor will account for settlement and ensure that design cross section is achieved.

3.3.4 Placement of Underlayer Material

The placement of the underlayer material must be accomplished in conjunction with the placement of the armor stone. The underlayer material shall be placed in such manner as to produce a well-graded mass of stone backfill. A tolerance of plus or minus 1 foot from the slope lines and grades shown on the drawings will be allowed in the finished surface of the underlayer material. The underlayer material shall be placed to provide a uniform base for the armor stone. The underlayer material shall be placed to its full thickness at one operation. The Contractor shall maintain the underlayer material until the armor stone is placed and any material displaced by any cause shall be replaced at his expense to the lines and grades shown on the drawings. During periods of construction work stoppage resulting from high flows, fish windows, etc., the Contractor is to take any precautions necessary to ensure that partially constructed rock fill areas, temporary piles, or rock stockpiles remain in place throughout the work stoppage.

3.3.5 Armor Stone Layer Placement

Two layers minimum of armor stone shall be placed on top of the underlayer material within the required placement limits shown on the drawings.

Additional armor stone thickness will be required where "pools" are to be constructed.Dropping of stones onto existing structures shall be strictly prohibited. The armor stone shall be so placed that the stones will form, as near as practicable, a compact mass and continuous cover for the underlayer stone. Armor stones shall be placed so as to be in contact with each other. A tolerance of plus or minus 1 foot vertical to the theoretical plane of surfaces will be allowed in the top and slopes of the armor stone.

SECTION 32 22 13.38 Page 10

3.3.6 Weir Stone Layer Placement

The weir stones are to be set to surface elevations shown and shall be located with the layout indicated on the drawings. Vertical tolerance in elevation for the set surface of weir stones shall be plus or minus four

(4) inches. Weir stones are to be set with a flatter surface on top and with that flatter surface roughly level. The weir stones are large and should extend one (1) foot above the 3.5%+ to 5%+ slope at the center of the channel. The large weir stones are approximately two (2) feet above the 3.5%+ to 5%+ finished surface slope at the edges of the channel and transition between the two. Large weir stones at the edge of the channel must be keyed into the placed armor stone or existing sideslope rock material so that the placed armor stone surface is between twelve (12") and eighteen (18") inches below the top of the weir stone. Where "pools" are proposed within the channel, weir stones are to be set with two (2) twelve-inch to eighteen-inch-wide (12" to 18") gaps for fish passage between adjacent weir stones. Two (2) gaps will be required upstream and two (2) will be required downstream for each "pool".

3.3.7 "Pool" Construction

Where noted on the plans in the center channel, roughly circular "pools" are to be formed by resetting armor stone material from "pool" centers and using the material to brace upstream and downstream faces of the rock arch weir stones. When completed the "pool" bottoms are to be approximately four (4) feet below the top of the adjacent upstream rock arch surface. In all cases, two (2) layers of (D50=27 inch) armor stone shall be maintained for protection of underlayer stone. Following shaping of the armor stone to form "pools", NCDOT Class A Riprap "Pool" Chinking stone is to be placed around the bottom of the "pools" to partially fill voids between armor stone pieces. Approximately 3 tons (+2 cubic yards) of NCDOT Class A Riprap "Pool" Chinking stone is to be placed within each pool for use in filling open voids. After larger voids have been filled, excess chinking stone is to be placed within the pool bottom and along the pool edges to fill voids. Plate D-19 shows details for construction of the "pools".

3.4 QUALITY CONTROL

3.4.1 General

The Contractor shall establish and maintain quality control for the riprap, underlayer stone, armor stone, and weir stone placement and all other operations in connection therewith to assure compliance with contract requirements. The Contractor shall inspect for compliance with contract requirements and record the inspection of all operations, including but not limited to the following:

a. Underlayer, armor stone, and weir stone complies with the specifications for quality and size and is placed to the lines and grades shown on the drawings within allowable tolerances.

b. All stone placed in a dense compact mass.

c. Stone marked for identification as to size and/or type and stockpiled in a manner to avoid contamination or segregation.

d. Rejected stone properly marked, disposed of properly, and all such transactions recorded.

SECTION 32 22 13.38 Page 11

3.4.2 Records

A copy of the records of inspections and reports of operations as well as any corrective actions taken shall be furnished to the Government as directed by the Contracting Officer.

-- End of Section --

SECTION 32 22 13.38 Page 12