B.08.03 - Solicitation Amendment 1.pdf
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- Attached to
- Tuttle Creek Riprap Repair
- Solicitation number
- W912DQ21B1005
About this file
This document is an amendment to a solicitation for construction services related to a riprap repair and debris removal project at Tuttle Creek Lake in Kansas. Key details include:
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The solicitation is being amended to provide clarification on stone source and material requirements, debris removal specifications, and riprap placement procedures. Revisions include identifying an approved quarry and stone ledge, adding debris removal between elevations 1100-1159 feet, and providing more detail on riprap grading, truck tailgates, and check survey requirements.
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The opportunity is for construction activities necessary for Riprap Repair and Debris Removal on the dam at Tuttle Creek Lake, Kansas, issued by the Department of the Army Corps of Engineers Engineering District Kansas City. Offerors must acknowledge receipt of the amendment in their bidding form.
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No changes were made to the drawings, and all other terms and conditions of the original solicitation remain in effect. The amendment serves to revise certain technical specifications for the riprap repair and debris removal project at Tuttle Creek Lake.
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Text version
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
This amendment w ill change parts of the specifications.
1. CONTRACT ID CODE PAGE OF PAGES
J 1 5
16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)
16C. DATE SIGNED
BY 15-Apr-2021
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 W912DQ21B1005
X 9B. DATED (SEE ITEM 11)
17-Mar-2021
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
15-Apr-2021
CODE
USACE, KANSAS CITY
FEDERAL BLDG CT-C 601 E 12TH ST RM 647
KANSAS CITY MO 64106-2896
W912DQ 7. ADMINISTERED BY (If other than item 6)
4. REQUISITION/PURCHASE REQ. NO.
CODE
See Item 6
FACILITY CODECODE
EMAIL:TEL:
W912DQ21B1005
SECTION SF 30 BLOCK 14 CONTINUATION PAGE
SUMMARY OF CHANGES
SECTION 00 10 00 - SOLICITATION
The following have been added by full text:
AMENDMENT 0001
NOTE: Deleted text is shown with strikethrough. Added text is shown with underline.
1. SPECIFICATIONS: Narrative Changes.
a. Section 35 31 19 – Stone Protection
Replace the existing requirement with the following:
Paragraph 1.4.1 Stone The Tarkio limestone from one local quarry has been tested and approved for use in this contract.
Submit suitable stone samples and test results prior to delivery of any stone material to the worksite, if the stone is not from the approved source listed below.
Quarry Name Quarry Location Approved Ledge(s) BAYER-HAYDEN Riley County, S 3 and Tarkio Limestone 785-539-8524 4, T11S, R9E (Pennsylvanian), Upper
3000 Tabor Valley Rd, massive ledge of Tarkio 66502 Limestone
Submit suitable stone samples and test results prior to delivery of any stone material to the worksite, from an approved source and location.
Paragraph 1.5 CONSTRUCTION TOLERANCES (second paragraph) The intention is that the work shall be built generally to the required elevations, slope and grade and that the outer surfaces shall be even and present a neat appearance. Placed material not meeting these limits shall be removed or reworked as directed by the Contracting Officer. Payment will not be made for excess material which the Contracting Officer permits to remain in place.
Per the construction plans, the required overlay thickness is between elevation 1122 and 1136.
Riprap will be extended below elevation 1122 in order to tie into the maximum required 2:1 slope and keyed into the existing slope for stability. The intention is that the work shall be built generally to the required elevations, slope and grade and that the outer surfaces shall be even and present a neat appearance. Placed material not meeting these limits shall be removed or reworked as directed by the Contracting Officer. Payment will not be made for excess material which the Contracting Officer permits to remain in place.
New Paragraph 3.1 DEBRIS REMOVAL Debris must be removed from the upstream embankment between El. 1100 feet and 1159 feet prior to placement of bedding or riprap material. Debris must be hauled off and disposed of at the location shown in the drawings. All woody debris with a diameter of 1.5 inches or greater must be removed.
Paragraph 3.4 PLACEMENT OF RIPRAP Riprap shall be placed in a manner which will produce a well-graded mass of rock with the minimum practicable percentage of voids, and shall be constructed, within the specified tolerances, to the lines and grades shown on the contract drawings. The Contractor shall submit survey information, prior to rock placement and immediately following rock placement, to verify thicknesses and tolerances have been achieved. Stones shall not be pounded with equipment in order to meet grade requirements. Riprap shall be placed by means of truck, crane operated skip-pan (box), dragline bucket, clamshell, rock-bucket, hydraulic excavator, trackhoe, or other approved equipment.
The use of tractor loaders or other equipment commonly referred to as front end loaders shall not be permitted. Pneumatic tired front end loaders may be used provided that in the opinion of the Contracting Officer no degradation of the rock occurs and is approved in writing by the COR. Riprap shall be placed to its full course thickness in one operation and in such manner as to avoid displacing the bedding materials. The large stones shall be well distributed and the entire mass of stones in their final position shall be graded to conform to the specified gradation. Placement shall begin at the bottom of the area to be covered and continue up slope. Subsequent loads of material shall be placed against previously placed material in such a manner as to ensure a relatively homogenous mass. The finished riprap shall be free from objectionable pockets of small stones and clusters of larger stones.
Placing riprap in layers will not be permitted. Placing riprap by dumping it into chutes, or by similar methods likely to cause segregation of the various sizes, is not permitted. Placing riprap by dumping it at the top of the slope and pushing it down the slope is not permitted. No equipment shall be operated directly on the completed stone protection system. The desired distribution of the various sizes of stones throughout the mass shall be obtained by selective loading of the material at the quarry or other source; by controlled dumping of successive loads during final placing; or by other methods of placement which will produce the specified results. No stone shall be dropped from a height greater than 3 feet. Each truckload shall be representative of the gradation requirements. All dump trucks used in placing the riprap shall be equipped with bottom hinged tailgates. The gate releasing mechanism shall be arranged so that it may be operated only from, at, or near the front of the truck. Rearranging of individual stones shall be required to the extent necessary to obtain a well-graded distribution of stone sizes as specified above. However, manipulating stone by means of dozers or other blade equipment shall not be permitted. The Contractor shall maintain the placed bedding and riprap until accepted by the Contracting Officer. Any material displaced prior to acceptance due to the Contractor's negligence shall be replaced to the lines and grades shown on the contract drawings, and at no additional cost to the Government.
Riprap shall be placed in a manner which will produce a well-graded mass of rock with the minimum practicable percentage of voids, and shall be constructed, within the specified tolerances, to the lines and grades shown on the contract drawings. The Contractor shall submit survey information, prior to rock placement and immediately following rock placement, to verify thicknesses and tolerances have been achieved. Stones shall not be pounded with equipment in order to meet grade requirements. Riprap shall be placed by means of truck, crane operated skip-pan (box), dragline bucket, clamshell, rock-bucket, hydraulic excavator, trackhoe, or other approved equipment.
The use of tractor loaders or other equipment commonly referred to as front end loaders shall not be permitted. Pneumatic tired front end loaders may be used provided that in the opinion of the Contracting Officer no degradation of the rock occurs and is approved in writing by the COR. Riprap shall be placed to its full course thickness in one operation and in such manner as to avoid displacing the bedding materials. The large stones shall be well distributed and the entire mass of stones in their final position shall be graded to conform to the specified gradation. Placement shall begin at the bottom of the area to be covered and continue up slope. Subsequent loads of material shall be placed against previously placed material in such a manner as to ensure a relatively homogenous mass. The finished riprap shall be free from objectionable pockets of small stones and clusters of larger stones.
Placing riprap in layers will not be permitted. Placing riprap by dumping it into chutes, or by similar methods likely to cause segregation of the various sizes, is not permitted. Placing riprap by dumping it at the top of the slope and pushing it down the slope is not permitted. No equipment shall be operated directly on the completed stone protection system. The desired distribution of the various sizes of stones throughout the mass shall be obtained by selective loading of the material at the quarry or other source; by controlled dumping of successive loads during final placing; or by other methods of placement which will produce the specified results. No stone shall be dropped from a height greater than 3 feet. The gradation and weight requirements must be met when placed on-site and not just at the quarry. Each truckload shall be representative of the gradation requirements. Over the road dump trucks must have bottom hinged tailgates, off-road trucks do not need tailgates. The gate releasing mechanism shall be arranged so that it may be operated only from, at, or near the front of the truck. Rearranging of individual stones shall be required to the extent necessary to obtain a well-graded distribution of stone sizes as specified above. However, manipulating stone by means of dozers or other blade equipment shall not be permitted. The Contractor shall maintain the placed bedding and riprap until accepted by the Contracting Officer. Any material displaced prior to acceptance due to the Contractor's negligence shall be replaced to the lines and grades shown on the contract drawings, and at no additional cost to the Government.
Paragraph 3.5.2.2 Check Surveys Surveys made by the Contractor are required on each material placed for determining that the materials are acceptably placed in the work. Make checks as the work progresses to verify lines, grades and thicknesses established for completed work. At least one (1) check survey as specified below shall be made for each 25 foot section as shown as practicable after completion. Following placement of each type of material, the cross section of each step of the work shall be approved by the Contracting Officer before proceeding with the next step of the work. Approval of cross sections based upon check surveys shall not constitute final acceptance of the work. Cross sections shall be taken on lines 25 feet apart, measured along the structure reference line, with readings at 5 foot intervals and at beaks along the lines. However, other cross section spacing and reading intervals may be used if determined appropriate by the Contracting Officer. Additional elevations shall be taken as the Contracting Officer may deem necessary or advisable. The surveys shall be conducted in the presence of an authorized representative of the Contracting Officer, unless this requirement is waived by the Contracting Officer. The elevation of the placed stone surface will be determined by the use of a leveling instrument and a rod having a base 12 inches in diameter. If approved by the COR, other means may also be used.
Surveys made by the Contractor are required on each material placed for determining that the materials are acceptably placed in the work. Make checks as the work progresses to verify lines, grades and thicknesses established for completed work. At least one (1) check survey as specified below shall be made for each 25-foot section as shown as practicable after completion. Following placement of each type of material, the cross section of each step of the work shall be approved by the Contracting Officer before proceeding with the next step of the work. Approval of cross sections based upon check surveys shall not constitute final acceptance of the work. Cross sections shall be taken on lines 25 feet apart, measured along the structure reference line, with readings at 15-foot intervals and at breaks along the lines. However, other cross section spacing and reading intervals may be used if determined appropriate by the Contracting Officer. Additional elevations shall be taken as the Contracting Officer may deem necessary or advisable. The surveys shall be conducted in the presence of an authorized representative of the Contracting Officer, unless this requirement is waived by the Contracting Officer. The elevation of the placed stone surface will be determined by the use of a leveling instrument and a rod having a base 12 inches in diameter. If approved by the COR, other means may also be used.
2. DRAWINGS: No Change
3. Offerors are required to acknowledge receipt of this amendment on the Bidding Form in the space provided. Failure to acknowledge all amendments may cause rejection of the proposal.
4. All other terms and conditions remain unchanged and in full force.
(End of Summary of Changes)
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