W9128F23Q0098_0001.docx

W9128F23Q0089

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SECTION SF 1449 - CONTINUATION SHEET

The following have been modified:

CONTRACT REQUIREMENTS

STATEMENT OF WORK

FOR

SUPPLY AND DELIVER QUARRIED STONE

ONTO GOVERNMENT BARGES

(REVISED AMENDMENT 0001)

INDEX

1. General Information

2. Stone Material Specifications

3. Required Testing

4. Stone Requirements

5. Stone Delivery

6. Measurement of Materials (Tons)

7. Payments

1. GENERAL INFORMATION

1.1. General: This is a Firm-Fixed-Price (FFP) Contract to supply, deliver, and load 60,000 tons of quarried stone onto government barges as defined in this Statement of Work (SOW) for the US Army Corps of Engineers (USACE) Omaha District.

1.2. Objective: The primary objective is to supply and deliver 60,000 tons of quarried stone onto government owned barges as defined in this SOW for the operation and maintenance of approved structures of the Missouri River Recovery Program and Bank Stabilization Navigation Project.

1.3. Place of Performance: The Missouri River between river mile 498 near Rulo, NE, and river mile 734 near Sioux City, IA.

1.4. Period of Performance: The period of performance for the total amount of the supply and deliver of quarried stone onto government barges is 730 days. The initial order of 1,000 tons of stone must be delivered and ready for loading onto government barges no later than 10 days after acceptance of preliminary test results. The contractor shall load subsequent deliveries onto government barges with a notice of three (3) days and shall maintain the capability to deliver and load up to 1,000 tons of stone per week on an intermittent and as-needed basis. See Section 2.5 for submittal of stone quality requirements.

1.5. Hours of Operation: The Contractor shall be required to supply and deliver material during normal duty hours of work, 7:00 a.m. to 3:30 p.m., Monday through Fridays, except Federal holidays or when the Government facility is closed due to local or national emergencies, administrative closings, or similar Government directed facility closings. Loading of government barges is expected to take place during the navigation flow support season which typically runs April 1 through November 30 each year. Intermittent loading outside this period may take place if acceptable to both parties and river conditions allow.

1.6. Recognized Holidays: The Contractor will not be required to supply and deliver material on Federal Holidays, unless agreed upon by both the Contractor and Contracting Officer.

The Federal Holidays include:

Independence Day

1.7. Contracting Officer’s Representative (COR): The COR monitors all technical aspects of the contract and assists in contract administration. The COR is authorized to perform the following functions:

a. Assures the Contractor performs the technical requirements of the contract.

b. Performs inspections necessary in connection with contract performance.

c. Maintains written and oral communications with the Contractor concerning technical aspects of the contract.

d. Monitors the Contractor's performance and notifies both the Contracting Officer and Contractor of any deficiencies.

However, the COR is NOT authorized to make any changes of the terms and conditions of the contract.

1.8. Post Contract and Periodic Progress Meetings: The Contractor agrees to attend any post award conference convened by the contracting activity or contract administration office in accordance with Federal Acquisition Regulation Subpart 42.5. The Contracting Officer, COR, and other Government personnel, as appropriate, may meet periodically with the contractor to review the contractor's performance and or performance requirements. At these meetings the contracting officer or COR will apprise the contractor of how the government views the contractor's performance and the contractor will apprise the Government of problems, if any, being experienced. Appropriate action shall be taken to resolve outstanding issues. These meetings shall be at no additional cost to the government.

2. STONE MATERIAL SPECIFICATIONS

2.1. Source: The Contractor shall submit the location of material sources for stone in accordance with these specifications. The locations shall be described to the quarter-quarter section and shall be clearly delineated on a map with a scale of one (1) inch equal 2,000 feet. The map shall also indicate roads and distances to the nearest cities or towns, which would appear on typical highway maps. The Contractor shall also submit a letter of clearance from the State Historic Preservation Officer permitting the quarrying, excavation, or other removal of the required contract materials.

2.2. Description: Whenever "stone" is specified in this contract, it shall be durable quarried stone approved by the COR and shall conform to all requirements of this statement of work. The Contractor shall submit samples of stone at the location of the sources of materials in accordance with this statement of work. In addition to the sampling and test results or service test records required of the Contractor, the COR reserves the right to inspect the material source and require additional samples of stone material to be submitted, selected by the COR for evaluation and approval prior to delivery of material, except for test purposes. These samples, identified by specific location and specific geologic formation shall be obtained by the Contractor and delivered at his expense to a point designated by the COR at least ten (10) days in advance of the time when the delivery of the stone material is expected to begin. The above inspection and sampling may be repeated any time the Contractor changes the location of geological formation from which the material is coming. The Contractor shall not be granted an extension of time or extra compensation due to any delay caused by sampling, testing, approval, or disapproval of stone material under the requirements of these specifications.

2.3. Stone Requirements: The stone shall consist of quarried stone meeting the quality requirements of these specifications. Neither the breadth nor the thickness of any piece of stone shall be less than one-third of its length. The pieces shall be angular in shape, free from rounded and sub rounded material. Angular stone is defined as having a minimum of three (3) major flat surfaces with sharp angles between the surfaces. Stone shall be reasonably well graded from coarse to fine. Quarry operation shall be controlled to produce a reasonable well graded stone of the required size, and the COR may require changes as necessary to produce the required product. Fines of less than one half inch maximum cross section, accumulated from interledge layers or from blasting or handling operations or breaking shall not exceed five (5) percent by weight.

The “COE Special” stone shall be reasonably well graded between the following limits:

Table 1 – COE Special Gradation Requirement

Tests to determine the quantity of fines less than one half inch maximum cross section shall be performed by the Contractor and inspected by the COR using approved methods. A representative sample consisting of not less than twelve (12) tons shall be tested at the start of quarry operations and at intervals during the production as directed by the COR, except that not less than one and not more than three acceptable tests will be required from each source. Results of the field tests shall be furnished to the COR. If the material fails to meet these requirements, the Contractor shall adjust the quarry operations to ensure the quantity of fines does not exceed the requirements of these specifications.

The stone shall be tested in accordance with this specification and meet the following requirements:

Table 2 – Stone Quality Requirement

(Min. at SSD) Soundness in Magnesium Sulfate (Max. % combined loss) Soundness in Freeze/Thaw (Max. % loss after 20 cycles)

Average of all three samples: 10%

2.4. Sampling and Testing Requirements: The Contractor shall be responsible for all sampling and testing specified herein. Upon request, furnish duplicate samples of test specimens to the COR for possible verification testing by the Government. All samples including samples taken during production shall be representative of the stone material furnished. Samples shall be taken in accordance with ASTM D 75 or other approved method. All sampling operations shall take place in the presence of a representative of the COR. No rock shall be furnished from any source which has not been sampled, tested, and approved.

2.5. Initial Sampling and Testing: Tests for bulk specific gravity, soundness in magnesium sulfate, soundness in freezing and thawing, and gradation field tests shall be performed on samples of material obtained from each ledge of proposed stone material prior to delivery. Test results shall describe type of failure of the discrete particles. The contractor shall submit any preliminary, existing test results including the name of the owner of the quarry and the legal description to the COR for review and approval no later than five (5) days after contract award. The COR may conditionally approve the preliminary test results for the initial delivery of up to 5,000 tons. Complete, test results performed by a USACE validated lab not longer than twelve (12) months prior to delivery including the name of the owner of the quarry and the legal description shall be submitted to the COR for review and approval no later than forty-five (45) days after contract award. For planning purposes, the government anticipates that test results will be approved within five (5) working days of submission. However, additional time may be required if results are not clear or additional clarification or interpretation is required.

2.5.1. Acceptability of Previous Test Results: Previously conducted test results submitted by the Contractor that are dated within twelve (12) months from contract award date may be accepted by the Contracting Officer. Acceptable tests must have been conducted from an active quarry ledge with sampling and testing conducted by a validated lab. Quarries with limited use data, poor historic test results, conflicting results, sampling methods and sizes that do not conform to test standards, and similar will be considered when requesting additional testing. The Contracting Officer may require new tests without justification at any time during contract performance. A contract performance period exceeding one (1) year may require additional sampling and testing at the discretion of the Contracting Officer.

2.5.2. Testing of New Sources: Tests, service records and results will be used to determine the acceptability of the quarried stone material. In the event test reports and a service record are satisfactory to the COR are not available, as in the case of newly operated sources, the material shall be subject to such tests as are necessary to determine its acceptability for delivery. Tests to which the material may be subjected include bulk specific gravity, soundness in magnesium sulfate, freezing and thawing, and other such tests may be considered necessary to demonstrate satisfaction to the COR of materials being acceptable for use in the work. All sampling of the stone materials will be inspected by the COR. All tests shall be performed by the Contractor at no cost to the Government and submitted to the COR in a quality control report no later than twenty-one (21) days prior to scheduled delivery.

2.6. Testing Procedure: Perform specified or required tests to verify that control measures are adequate to provide a product which conforms to contract requirements. Procure the services of a U.S. Army Corps of Engineers approved testing laboratory or establish an approved testing laboratory at the project site.

Perform the following activities and record and provide the following data:

a. Verify testing procedures comply with contract requirements.

b. Verify facilities and testing equipment are available and comply with testing standards.

c. Check test instrument calibration data against certified standards.

d. Verify recording forms and test identification control number system, including all of the test documentation requirements have been prepared.

e. Record results of all tests completed, both passing and failing on the contractor’s quality control report for the date taken. The quality control report shall be submitted to the COR no later than fourteen (14) days prior to the scheduled delivery. Failure to submit timely test reports as required may result in nonpayment for related work performed and disapproval of the test facility for this Contract.

2.6.1. Testing Laboratories: All testing laboratories must be validated by the USACE Material Testing Center (MTC) for the tests to be performed. Information on the USACE MTC with web-links to a list of validated testing laboratories can be found at: https://mtc.erdc.dren.mil/. Click on "Lab Validation" and then “Search for a Validation.”

3. REQUIRED TESTING

3.1. Bulk Specific Gravity: Bulk specific gravity shall be computed in accordance with ASTM C 127/ASTM C 128 except that the total sample shall weigh 5000 grams +/-2 percent and individual particles shall weigh approximately 300 grams each. Stone protection material shall be tested in a saturated surface-dry (SSD) condition. The computed bulk specific gravity so determined shall not be less than what is shown in Table 2 above.

3.2. Soundness in Magnesium Sulfate: Soundness in magnesium sulfate shall be determined according to ASTM C 88 with test modifications as listed below. The combined loss at five cycles shall be not more than the percent shown in Table 2 above. The test report shall show the percentages of loss calculated as described herein and the number of pieces affected, classified as to number disintegrating, splitting, crumbling, cracking, flaking, etc.

3.3. Sample: The sample shall be prepared by breaking it into fragments reasonably uniform in size and shape and weighing approximately 100 grams each. The test sample shall weigh 5,000 grams +/- 2 percent. The sample shall be thoroughly washed and dried before test as described for coarse aggregate. The samples immersed in the solution shall be maintained at a temperature of 80 degrees F +/- 2 degrees F for the immersion period.

3.4. Quantitative Examination: At the end of the fifth cycle, the percentage loss shall be determined by the three (3) following methods. The test report shall show the loss computed by each method; however, only the combined loss shall be used for acceptance or rejection of the material.

a. Loss by Breaking: An individual piece which has broken or split into three (3) or more fragments shall be considered to have failed the test, provided each of the three such fragments is at least ten (10) percent of the original piece by weight. The total original weight of all pieces failing the test, expressed as percentage of the total original weight of the sample, shall be considered as percentage loss by breaking.

b. Loss by Crumbling and Flaking: After the loss by breaking has been determined, the pieces that have not failed in that determination shall be screened on the half inch sieve and the material retained on the sieve shall be weighed for purposes required to determine combined losses. The pieces which have failed by breaking shall then be added to the material remaining on the half inch sieve and screened. The difference between the total original weight of the sample and the total weight of the material retained on the half inch sieve expressed as percentage of the total original weight, shall be considered as percentage loss by crumbling and flaking.

c. Combined Loss: The difference between the total original weight of the material retained on the half inch sieve, after screening the pieces which did not fail by breaking, expressed as percentage of the total original weight, shall be considered as percentage combined loss.

d. Report: The report for the stone shall show the percentages of loss calculated as described herein before and the number of pieces affected, classified as to number disintegrating, splitting, crumbling, cracking, flaking, etc.

4. STONE REQUIREMENTS

4.1. The Soundness in Freezing and Thawing-Method for Riprap Rock: The test for freezing and thawing shall consist of CRD-C 144, Standard Test Method for Resistance of Rock to Freezing and Thawing. The test shall be performed on a minimum of three (3) specimens, and the maximum loss at twenty (20) cycles for each individual specimen shall not exceed the percent shown in Table 2 above. The test report submitted for approval shall contain information as required by CRD-C 144.3.4.4 Gradation Field Tests.

4.2. Sample: Rock source samples shall be collected that are representative of the desired rock gradation with a minimum size of twelve (12) inches in any dimension and 25,000 grams (55 pounds). Prepared specimens subjected to testing should be as large as possible, up to the capacity of pans used for the test and shall be at least 5,000 grams (11.0 pounds).

4.3. Stone Requirements: The Gradation Field Tests: Tests to determine the number of fines of less than one-half inch maximum cross section and to determine the gradation of the quarried stone material shall be performed by the contractor and inspected by the COR under approved methods. A representative sample, consisting of not less than twelve (12) tons, shall be tested at the beginning of operations and at intervals during the period of performance, as directed. A total of three acceptable tests shall be required from each different source of stone material and for each specified gradation. These tests shall be performed at the quarry prior to delivery of the stone. The test shall be conducted immediately upon request of the COR. The Contractor shall plot the results of each test for gradation in relation to the gradation limits envelope specified. The plots shall be made on Engineering Form 4055, furnished by the COR, or on a similar form. Results of the field test and the plots shall be furnished to the COR prior to delivery of the stone. If at any time the material fails to meet the requirements, the Contractor shall adjust his operations to control the number of fines to meet the specifications.

5. STONE DELIVERY

5.1. Delivery Location(s): Stone materials shall be delivered and loaded onto government barges along the Missouri River at one (1) or two (2) acceptable loading dock/area location between river mile 498 near Rulo, NE, and river mile 734 near Sioux City, IA. The locations for the north and south delivery areas may be the same, but multiple locations in each delivery areas are not allowed. If two (2) delivery locations are identified by the contractor, one must be located between river mile 498 and river mile 640 and the other must be located between river mile 640 and river mile 734.

5.2. Delivery method: The acceptable loading dock/area shall provide a minimum of seven (7) foot draft at any time, be accessible by all-weather public roads, be secure from public access, and have an acceptable staging/mooring area for loaded and unloaded barges within a quarter mile from loading location. The contractor shall maintain capability to load stone during river conditions up to six (6) feet above the Construction Reference Plane (CRP) at the loading facility. A secure area for staging government vehicles shall be provided. The loading location shall not change and must remain constant during the duration of the Contract unless otherwise approved by the COR. The contractor shall load the barges level and symmetrically by a process that will not cause damage to the government barges by equipment or falling stone. The contractor shall provide the required material handling equipment and trained operators to load the stone.

6. MEASUREMENT OF MATERIALS (TONS):

6.1. Material: Material shall be measured for payment in tons using the “Scale Method”. The weigh bill or other approved methods shall not be older than forty-eight (48) hours.

6.2. Weigh: Stone delivered may be weighed for payment on public scales which have been approved by the COR and which have been certified by the State wherein the scales are located. The stone shall be weighed to the nearest (twenty) 20 pounds and the net weight reduced to the nearest hundredth of a ton. If public scales are not available, the Contractor may furnish approved scales subject to certification acceptable to the COR, and the weighing service may be supplied by an independent professional organization approved by the COR. The Contractor shall furnish the COR a copy of each printed weigh bill when self-printing scales are used, or a copy of the weigh bill signed by the weighmaster as each load is delivered. Each weigh bill shall contain the following: date, unit number, time of gross weight, time of net weight, name of project, contract number, name of Contractor and signature of the weigher.

6.3. Weigh Options: If public scales or an independent professional weighing service is not available, stone delivered may be weighed for payment by a bonded weighmaster on scales which have been approved by the COR and which have been certified by the applicable State wherein the scales are located. The Contractor shall furnish the COR a copy of each weigh bill signed by the bonded weighmaster as each load of stone is delivered.

7. PAYMENTS:

7.1 Payments: Payments will be made after receipt of a proper invoice or receipt of acceptable supplies, whichever is later, but not more than monthly and in accordance with FAR 52.212-4 The contractor is required to include the contract number, date loaded, barge number loaded, total tons loaded on all invoices so that receipt and payment for the item or service may be expeditiously processed. Send invoices to Jeremiah J. Szynskie at jeremiah.j.szynskie@usace.army.mil.

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