Attachment1Specs.pdf

SECTION 35 31 19

STONE PROTECTION FOR SHORELINE

01/08

PART 1 GENERAL

1.1 SUMMARY

This work consists of furnishing all plant, labor, equipment, and materials to furnish and stockpile stone protection in accordance with these specifications and location map at the Little Beaver Bay Recreation Area located in the NE1/4 of Section 23, T154N, R95W in Williams County, ND approximately 42 miles east of Williston, ND. The Contractor shall control operations during production of stone protection material so as to ensure that the material delivered and stockpiled will meet all specification requirements. The Contractor shall perform all sampling and testing required for quality control in accordance with the provisions of this section. The quarry operators shall be responsible for operating in accordance with all applicable Federal, State, and local laws and regulations.

1.2 UNIT PRICES

1.2.1 Riprap

1.2.1.1 Payment

Payment for riprap shall include all labor, equipment, materials, testing, and performing all operations in furnishing, transporting, hauling, and stockpiling riprap as required by the contract specifications and drawings. Costs associated with stripping and stockpiling topsoil, installing erosion control measures, and shaping and compacting the stockpile site shall be included in the bid price for riprap.

1.2.1.2 Measurement

Riprap will be measured for payment by the ton. Quantities will be computed to the nearest whole ton. Riprap will be measured for payment, in the presence of the Contracting Officer, by weighing on approved, accurately calibrated scales furnished by and at the expense of the Contractor.

a. Truckload. Each truck load shall be weighed to the nearest 20 pounds and the net weight reduced to the nearest 0.1 ton. The final quantity shall be rounded to the nearest whole ton. Riprap will be measured for payment by weighing on: a) public or private scales which have been certified by the ND State Public Service Commission, or b) contractor furnished scales under the supervision of the COR. Approved scales shall be of sufficient length to permit simultaneous weighing of all axle loads. The scale's accuracy shall be certified by a scale service company registered with the North Dakota Public Service Commission. If the certification is more than 9 months old when the scale begins project use, have the scale recertified. Submit a copy of the certification before starting weighing operations. The scale must be accurate to within 1.0 percent of the true weight of the applied load throughout the range of use. The scales shall be capable of printing a weight ticket including project name, time, date, truck number, contractor and subcontractor, unit of measure, gross weight, tare weight, and net weight. The Contractor shall furnish the Government Inspector a copy of each printed weigh ticket when self printing scales are used, or a copy of the signed ticket by a weighmaster as each load is delivered.

Daily haul summaries shall be submitted for each day material is hauled to the site. Submit haul summaries to the COR at the start of the next day's haulage. The daily haul summaries shall contain the following:

(1) project name and contract no.

(2) Delivery date;

(3) Contractor and Subcontractor;

(4) Pit location and owner;

(5) Identification number of truck;

(6) Each load’s net weight and ticket number, with justification for out of sequence numbers;

(7) Material type identified by bid item name;

(8) Total weight of material delivered to the project;

(9) Weight of material voided for the day;

(10) Weight of the day’s production;

(11) A signed statement from the Contractor attesting to the accuracy and completeness of the facts represented. A signed statement from a subcontractor or supplier attesting to the accuracy and completeness of the facts represented is required if they operate the scales. The statement shall consist of the following language: “I certify the Daily Haul Summary is true, accurate, and complete;”

(12) Blank for the Engineer’s signature. Include the following language: “I certify the Daily Haul Summary has been reviewed, corrected as necessary, and approved;”

(13) Place for comments.

The Contractor shall perform a comparison test on a loaded truck randomly selected by the COR at the beginning of the project using an independent scale owned and operated by an entity other than the contractor and certified by the ND State Public Service Commission.

Throughout the duration of the project the COR may request additional comparison tests. If the difference between the weight determined by the scale and the comparison test is more than 1.0 percent, the project scale shall be repaired and recertified by the ND State Publice Service Commission.

1.2.1.3 Unit of Measure

Unit of measure: Ton.

1.3 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM C127 (2015) Standard Test Method for Density, Relative Density (Specific Gravity), and Absorption of Coarse Aggregate

ASTM C88 (2013) Standard Test Method for Soundness of Aggregates by Use of Sodium Sulfate or Magnesium Sulfate

ASTM D5519 (2015) Particle Size Analysis of Natural and Man-Made Riprap Materials

ASTM D75/D75M (2014) Standard Practice for Sampling Aggregates

AMERICAN ASSOCIATION OF STATE HIGHWAY TRANSPORTATION OFFICIALS

(AASHTO)

AASHTO T 103-08 (2012) Standard Method of Test for Soundness of Aggregates by Freezing and Thawing

1.4 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-03 Product Data

Stone Protection; G-PO Initial tests, source, legal description, Geologic Record and Service

Record for Stone Protection

SD-06 Test Reports

Gradation Tests; G-PO

Bulk Specific Gravity; G-PO

Soundness In Magnesium Sulfate; G-PO

Soundness In Freeze-Thawing; G-PO

SD-07 Certificates

Weigh Scale Certification; G-PO

Certified Weight Scale Tickets; G-PO

Daily Haul Summaries; G-PO

Testing Laboratory

1.5 Sampling and Testing

1.5.1 General Requirements

The Contractor shall be responsible for all sampling and testing specified herein. Testing shall be performed by a Corps validated commercial testing laboratory. Submit qualifications of the Corps validated commercial testing laboratory. The Government may perform verification tests as determined necessary for final approval of the stone protection material (riprap). All samples including samples taken during production shall be representative of the stone protection material furnished or proposed to be 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 the Contracting Officer or a representative of the Contracting Officer.

At the same time samples for initial tests are obtained, the ledge or ledges in quarries sampled shall be marked with an approved semi-permanent marking which will be readily visible during the period of riprap production. No rock shall be furnished from any ledge which has not been sampled, tested, and approved for use on this project. The Contracting Officer has the option to select samples from stockpiles at the production facility (quarry) or at the construction site.

1.5.2 Test Results

Results shall verify that materials comply with this specification. When a material source is changed, the new material will be tested for compliance.

When deficiencies are found, the initial analysis shall be repeated and the material already placed shall be retested to determine the extent of unacceptable material. All in-place unacceptable material shall be replaced or modified as directed by the Contracting Officer's Representative.

1.5.3 Initial Sampling and Testing Requirements (Riprap)

Tests for bulk specific gravity, soundness in magnesium sulfate, and soundness in freezing and thawing shall be performed on samples of material obtained from each ledge proposed for use as stone protection prior to start of construction. Test results shall describe type of failure of the discrete particles. Certified test results performed not longer than 12 months prior to delivery to the project together with the name of the owner of the quarry and the legal description shall be submitted to the Contracting Officer's Representative.

1.5.4 Bulk Specific Gravity

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 2.55.

1.5.5 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 not be more than 8 percent. The test report shall show the percentages of loss calculated as described herein and 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.

1) 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.

2) 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 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.

3) 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.

1.5.6 Freeze-Thaw Testing for Riprap

Testing of the riprap shall be in accordance with AASHTO T 103-08, Standard Method of Test for Soundness of Aggregates by Freezing and Thawing . The maximum loss at 25 cycles shall not exceed 15 percent by weight.

PART 2 PRODUCTS

2.1 STONE PROTECTION MATERIALS

2.1.1 General Requirements

All stone for stone protection shall be durable angular field stone or quarried rock with a minimum of two fractured faces as approved by the Contracting Officer's Representative. Individual pieces of stone protection in-place shall be free from cracks, seams, and other defects that will cause rapid or excessive deterioration or degradation during service. The bulk stone protection material delivered to the project shall be of such quality that tests performed on representative samples have results within the limits specified. The stone protection shall contain no more than 5 percent of undesirable material by weight. Undesirable material is defined as individual pieces of stone which do not meet the quality requirements when tested as specified herein and which can be visually differentiated from the satisfactory pieces, plus dirt, sand, clay, and rock fines. Stone protection material shall not contain disintegrated granite or shale. The Contractor shall select the source or sources he proposes to use and perform the initial sampling and testing of the materials well in advance of the time when the material will be required in the work.

2.1.2 Riprap Stockpile

The Contractor's stockpile shall be a maximum of 12 feet high and formed by a series of layers of truckload dumps, where the rock essentially remains where it is placed. Subsequent layers shall be started 10 feet from the edge of the previous layer so that the rock will not roll down the edges of the previous layers. The first layer shall be a maximum of 6 feet high.

The stockpile location is shown on the attached location map.

Topsoil shall be stripped up to a maximum of 6 inches for the riprap stockpile area and stockpiled adjacent to the riprap stockpile. The topsoil stockpile shall be shaped with a slope of 4:1 or flatter so it can be seeded and used for reclaiming the stockpile site after riprap is placed. Shape and compact the site so water drains away from the stockpiled material. Install erosion control features around the perimeter of the stockpile as approved by the COR and meeting the requirements of the North Dakota Department of Health. The govenment will seed the topsoil stockpile upon completion of shaping the stockpile.

2.1.3 Riprap

The riprap shall consist of stone meeting the requirements specified herein and shall be in pieces approximately rectangular in cross section, free from thin slabby pieces having a maximum dimension more than four times the least dimension. Stone for riprap shall be reasonably well graded from coarse to fine. Dirt and fines of less than 1/2-inch maximum cross section, accumulated from interledge layers or from blasting or handling operations shall not exceed 5 percent by weight.

2.1.4 Stone Weight Limitations

The riprap shall be reasonably well-graded. Gradation limits are shown below.

Percent of Total Weight Lighter than or Passing Weight in Lbs per Stone.

100 2000 60 - 85 1500 30 - 60 1000

10 - 30 500 0 - 10 150

2.1.5 Execution

Quarry operations shall be controlled to produce a reasonably well-graded stone of required size, and the Contracting Officer may require changes as necessary to produce the required product. The Contractor's operations shall be conducted in a manner that will produce stone meeting the requirements specified and shall include selective quarrying, handling, loading, and stockpiling as required.