SOW__AMDMNT_0001_0001.pdf

Lower Yellowstone Bypass Canal Riprap

DESCRIPTION / SPECIFICATIONS /

STATEMENT OF WORK

Solicitation NO. 140R6026Q0092

Lower Yellowstone Bypass Canal Riprap Solicitation No. 140R6026Q0092 Materials Specifications Amendment No. 0001

LOWER YELLOWSTONE BYPASS CANAL RIPRAP

Material Specifications

INTRODUCTION

The Bureau of Reclamation, Missouri Basin Region requires riprap and bedding material for repairs to the Lower Yellowstone Bypass Canal near Glendive, MT. Material will be stockpiled during the period of performance in 2026-2027. Because crews will not be onsite during this phase of this project, the vendor will be required to dress the stockpiles with a loader or comparable piece of equipment, and the delivery route as needed if impassable conditions develop.

LOCATION

Project is located approximately 16 miles northeast of Glendive, MT. Coordinates to the stockpile location are: 47.261864, -104.540269.

RIPRAP MATERIAL

GENERAL

1.01 REFERENCE STANDARDS

A. ASTM International (ASTM)

1. ASTM C88 Test method of soundness of aggregates

2. ASTM C535 Test method for resistance to degradation

3. ASTM C97 Specific gravity and absorption of fine aggregate

1.02 DELIVERY, STORAGE, AND HANDLING

This is a multiyear funded project. Reclamation will perform construction at a future date.

However, we require the riprap and bedding to be purchased and stockpiled in 2026-2027. Due to this constraint, we have very limited support staff or equipment to assist in the material delivery and offloading.

A. Stockpile locations near the dikes are shown on the figure above.

1. 25,000 Tons of riprap material delivered to stockpile site A.

B. Material may be delivered in double side dumps or any lesser configuration of truck and trailer.

The vendor will be required to provide a bucket loader (or comparable equipment) and operator to buck the delivery stockpiles of riprap into reasonably consolidated piles accessible to heavy equipment. The intent of this requirement is to maximize space in the limited area available for stockpiles. This service is incidental to the delivery of the supply and is the means to offload and deliver the material. We expect the loader to be utilized in the most cost effective manner possible. The required time onsite for both the loader and operator, as well as the size and fuel requirements of the loader shall be evaluated by the offeror and quoted as lump sum on a CLIN separate from the per ton price of the riprap.

C. The final portion of the access route will be over a dirt road that is unmaintained. The road may need periodic attention with a piece of equipment and the addition of some aggregate base throughout delivery. The stockpile areas may also need some aggregate base to help facilitate truck access on and off the road. The vendor will be required to maintain the road only to the extent that they can maintain accessibility throughout delivery. This effort is anticipated to be minimal. It will entail filling, with aggregate base course, any potholes or ruts created by the delivery process, only to the extent that delivery continues unabated throughout the Period of Performance. The vendor will not be responsible for any pre-existing road conditions and/or road damage caused by significant rains, floods, washouts, or other unanticipated barriers to access. What little maintenance work is required, will be as a direct result of furnishing the riprap. A separate CLIN for aggregate base course is included in this solicitation and may be drawn on by the vendor on an “as needed” basis. If the total quantity is not used by the vendor, the remaining dollar amount will be converted to riprap at the contracted rate.

D. Handle, load, haul, stockpile materials to minimize breakdown.

E. Provide digital pdf copies of load tickets indicating date, truck ID, and weight to COR via email at: jhahn@usbr.gov. Load tickets must be submitted with invoice.

F. Delivery may commence upon award of contract. The Period of Performance will go through November 30, 2027.

G. Vendor may invoice biweekly.

1.03 SUBMITTALS

A. Testing results shall include Specific Gravity, Sulfate Soundness, and Soundness in

Freezing and Thawing. Please submit lab results to Jason Hahn at jhahn@usbr.gov for approval 3-days prior to delivery.

1. Gradation

a. Certification that riprap meets specified gradations from an independent lab.

2. Bulk Specific Gravity

a. Bulk specific gravity shall be computed in accordance with ASTM C 127 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 2.65.

3. 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 5 cycles shall be not more than 8 percent. 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.

a. Sample Preparation

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 5000 grams +/- 2 percent. The sample shall be thoroughly washed and dried previous to test as described for coarse aggregate.

b. Sample Immersion and Temperature

The sample immersed in the solution shall be maintained at a temperature of 80 degrees F +/- 2 degrees F for the immersion period.

c. Quantitative Examination

At the end of the fifth cycle, the percentage loss shall be determined by the three 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.

d. Loss By Breaking

An individual piece which has broken or split into three or more fragments shall be considered to have failed the test, provided each of the three such fragments is at least 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.

e. 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 1/2-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 1/2-inch sieve and screened. The difference between the total original weight of the sample and the total weight of the material retained on the 12.5 mm sieve expressed as percentage of the total original weight, shall be considered as percentage loss by crumbling and flaking.

f. Combined Loss

The difference between the total original weight of the sample and the weight of the material retained on the 1/2-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.

4. Soundness in Freezing and Thawing

The test for freezing and thawing shall consist of AASHTO T 103, Ledge Rock

Method, Procedure C, modified as indicated below. The loss at 12 cycles shall not exceed 5.0 percent. The test report shall describe the type of failure of the discrete particles.

a. Temperature

The temperature of the surrounding medium during freezing shall be maintained in the range of -20 to -10 degrees F.

b. Freeze/Thaw Cycle

The length of a freezing and thawing cycle shall be sufficient to totally freeze and totally thaw each piece of the same during each cycle. The laboratory shall specifically determine for each sample that the cycle used is sufficient to accomplish total freezing and total thawing and shall report this in the test report. However, in no case shall the cycle consist of less than 2-1/2 hours of freezing followed by 1 hour of thawing. The sample shall be held in the frozen condition whenever necessary to break the cycle (overnight, weekends, etc.).

5. Immersion

a. Procedure C, Partial Immersion shall be used, except that soaking prior to testing shall be in accordance with Procedure A.

1.04 RIPRAP MATERIAL

A. Source:

1. Approved Commercial Source.

B. Material:

1. Stones shall be graded in size to produce a reasonably dense mass. Riprap shall consist of dense, natural rock fragments. Stones shall be resistant to weathering and to water action; free from overburden, spoil, shale and organic material; and shall meet the gradation requirements below. Shale and stones with shale seams or caliche are not acceptable.

(a) Specific gravity, ASTM C97, minimum: 2.65.

(b) Loss, Sulfate Soundness, ASTM C88, maximum: 8 percent.

(c) Soundness in Freezing and Thawing: 5 percent.

2. Either quarried rock or boulders may be used for riprap.

3. Shape:

(a) Predominantly angular.

(b) Maximum dimension not greater than 3 times minimum dimension.

4. Riprap shall conform to the size types as follows:

D100 16-Inch Riprap

Stone Weight in Lbs. Percentage Lighter by

Weight

92-205 (16”) 100

41-86 (8”) 50

13-43(4”) 15 Table 1 - Riprap Gradation Requirements

5. The above gradations are for use as general guidelines.

6. The acceptability of the stones will be determined by Reclamation as delivery is made.

END OF SECTION

BEDDING MATERIAL

GENERAL

1.01 REFERENCE STANDARDS

A. ASTM International (ASTM)

1. ASTM C33/C33M-11 Concrete Aggregates

2. ASTM C128-12 Density, Relative Density (Specific Gravity), and

Absorption of Fine Aggregate

1.02 DELIVERY, STORAGE, AND HANDLING

A. Stockpile locations near the dikes are shown on the figure above.

1. 20,000 Tons of bedding material delivered to stockpile site A.

B. Handle, load, haul, stockpile, and place materials to minimize segregation, contamination, and breakdown.

C. Vendor may deliver in double side dumps or any lesser configuration of truck and trailer.

D. Provide digital pdf copies of load tickets indicating date, truck ID, and weight to COR via email at: jhahn@usbr.gov. Load tickets must be submitted with invoice.

E. Delivery may commence upon award of contract. The Period of Performance will go through November 30, 2027.

F. Vendor may invoice biweekly.

PRODUCTS

1.03 BEDDING MATERIAL

A. Source:

1. Approved Commercial Source.

B. Material:

1. Bedding material shall be at least equal in quality to that of the stone used for riprap and shall be well graded between the sizes specified. Bedding material shall be quarried stone, crushed cobbles, and crushed gravel consisting of particles having at least one fractured face. The material shall be composed of tough, durable particles, shall be reasonably free from thin, flat and elongated pieces, and shall contain no organic matter nor soft, friable particles.

2. Deleterious Substances: Conform to ASTM C 33, Section 7.

3. Soundness: Conform to ASTM C 33, Section 8.

4. Specific Gravity: 2.65 minimum, ASTM C 128.

5. Well-graded mixture conforming to gradations shown in Table 2.

Sieve Designation Percentage by Weight Passing Square-

Mesh Sieve

4-inch 100

3-inch 75-95

2.5-inch 40-70

1-inch 30-60

½-inch 10-30

3/8-inch 5-20

Table 2 - Bedding Material Gradation Requirements

EXECUTION

1.01 FIELD QUALITY CONTROL TESTING

A. Gradation Testing:

1. Vendor is responsible for performing Quality Assurance testing to ensure material is meeting gradation requirements. Vendor shall supply Reclamation with test results for approval prior to delivery.

END OF SECTION

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