B08 7N24B0001 Baker Bay Amendment 1 Revised Specification 35 31 19.00 25.pdf

Baker Bay Pile Dike Repairs

SECTION 35 31 19.00 25 Page 3

SECTION 35 31 19.00 25

DIKE ENROCKMENT

PART 1 GENERAL

1.1 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.

AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION OFFICIALS

(AASHTO)

AASHTO T 27 (2014) Standard Method of Test for Sieve Analysis of Fine and Coarse Aggregates

ASTM INTERNATIONAL (ASTM)

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

ASTM C131/C131M (2020) Standard Test Method for Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine

ASTM C295/C295M (2019) Standard Guide for Petrographic Examination of Aggregates for Concrete

ASTM C88 (2018) Standard Test Method for Soundness of Aggregates by Use of Sodium Sulfate or Magnesium Sulfate

ASTM D2488 (2017; E 2018) Standard Practice for Description and Identification of Soils (Visual-Manual Procedure)

ASTM D3740 (2019) Minimum Requirements for Agencies

Engaged in the Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction

ASTM D4992 (2014; E 2015) Evaluation of Rock to be Used for Erosion Control

ASTM D5312/D5312M (2012; R 2013) Evaluation of Durability of Rock for Erosion Control Under Freezing and Thawing Conditions

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

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U.S. ARMY CORPS OF ENGINEERS (USACE)

COE CRD-C 144 (1992) Standard Test Method for Resistance of Rock to Freezing and Thawing

COE CRD-C 148 (1969) Method of Testing Stone for Expansive Breakdown on Soaking in Ethylene Glycol

1.2 DEFINITIONS

1.2.1 Dike

The term "dike" applies to the types of stabilization structures that are constructed along the river at an angle to the current--typically perpendicular to the shoreline. Dikes are constructed of stone or piling.

1.2.2 Enrockment

The Enrockment is the portion of the dike that is constructed entirely of graded armor stone.

1.2.3 Bedding Material

A layer of small graded stone placed on the in-situ soil to form a base on which the enrockment is built. The bedding layer helps reduce enrockment settlement and lateral movement at the enrockment base.

1.2.4 Scour Protection Blanket

A layer of graded stone placed on the in-situ soil to form a scour-resistant layer that limits erosion of underlying in-situ soil.

Scour protection blanket material will be placed adjacent/lateral to fish notches constructed within the newly placed enrockment material.

1.2.5 Dynamic Revetment

A Dynamic Revetment is constructed along the shoreline to prevent wave or current induced erosion. Composed of cobbles creating a more porous area that can absorb wave action, reducing turbulence and reflective dissipation. The cross-section is compliant with wave and water level forcing and is naturally re-shaped following construction to an equilibrium profile to match evolving site conditions. The dynamic revetment will protect the existing backshore and dune from waves and currents that may be focused along the shore attachment area of the newly constructed enrockment. To realize the dynamic revetment function, the dynamic revetment must be constructed prior to completing the shore attached portion of the enrockment along STA 1+00 to 4+00.

1.2.6 Filter Material Layer

A layer of small-graded stone placed on the in-situ soil to form a base on which the Dynamic Revetment is built. The filter material layer helps reduce structure settlement and lateral movement at the revetment base.

1.3 SUBMITTALS

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

submittals not having a "G" designation are for information only. When

SECTION 35 31 19.00 25 Page 5 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-01 Preconstruction Submittals

Dynamic Revetment Construction Plan

SD-03 Product Data

Bulk Specific Gravity of Stone; G

Quarry Source

SD-04 Samples

Stone; G

SD-06 Test Reports

Gradation Test

Evaluation Testing of Stone

SD-07 Certificates

Stone

Laboratory; G

Post-Placement Surveys; G

SD-11 Closeout Submittals

Placement Survey

1.4 QUALITY ASSURANCE

1.4.1 Stone

Submit suitable stone samples prior to delivery of any such material to the worksite.

1.4.1.1 General

All stone will be durable material as approved by the Contracting Officer.

Show that an adequate quantity of material is available and provide quality test data. Stone must be of a suitable quality to ensure permanence in the structure and in the climate in which it is to be used.

Stone must be free from cracks, blast fractures, bedding, seams and other defects that would tend to increase its deterioration from natural causes. The stone must be clean and free from all foreign matter.

1.4.1.2 Stone Sources

Stone must be furnished from a source designated by the Contractor and accepted by the Contracting Officer, subject to the conditions herein stated. The Government will conduct a quarry investigation and evaluate the quality test data provided by the Contractor to determine whether

SECTION 35 31 19.00 25 Page 6 acceptable stone can be produced from the proposed source. Satisfactory service records on other work may be acceptable. For stone to be acceptable on the basis of service records, stone of a similar size must have been placed in a similar thickness and exposed to weathering under similar conditions as are anticipated for this Contract, and must have satisfactorily withstood such weathering for a minimum of five years. If no such records are available, the Government will conduct tests to assure the acceptability of the stone. In addition to an acceptable five year service record, the Contracting Officer has the option to elect to have representative samples taken and tested.

a. Selection of Source. Designate in writing all sources proposed to furnish stone. Determine that the stone source or combination of sources selected is capable of providing the quality, quantities and gradation needed and at the rate needed to maintain the scheduled progress of the work. Provide samples for acceptance testing in accordance with Paragraph EVALUATION TESTING OF STONE below.

b. Acceptance of Materials. Acceptance of a source of stone is not to be construed as acceptance of all material from that source. The right is reserved to reject materials from certain localized areas, zones, strata, or channels, when such materials are unsuitable for stone as determined by the Contracting Officer. The Contracting Officer also reserves the right to reject individual units of produced specified materials in stockpiles at the quarry, all transfer points, and at the project construction site when such materials are determined to be unsuitable. During the course of the work, the stone may be tested by the Government, if the Contracting Officer determines that testing is necessary. If such tests are determined necessary, the testing will be done in the Government's testing laboratory or commercial laboratory selected by the Government. The cost of testing will be at the Government's expense. During the Contract period, both prior to and after materials are delivered to the job site, visual inspections and measurements of the stone materials may be performed by the Contracting Officer. If the Contracting Officer, during the inspections, finds that the stone quality, gradation or weights of stone being furnished are not as specified or are questionable, re-sampling and re-testing is required. Sampling of the delivered stone for testing and the manner in which the testing is to be performed must be as directed by the Contracting Officer. This additional sampling and testing must be performed at the Contractor's expense when test results indicate that the materials do not meet specified requirements. When test results indicate that materials meet specified requirements, an equitable adjustment in the Contract price will be made for the sampling and testing. Any material rejected must be removed or disposed of as specified and at the Contractor's expense.

1.5 REGULATORY REQUIREMENTS

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

1.6 CONSTRUCTION TOLERANCES

a. The finished surface and stone layer thickness must not deviate from the lines and grades shown by more than the tolerances listed below. Tolerances are measured perpendicular to the indicated

SECTION 35 31 19.00 25 Page 7 neatlines. Extreme limits of the tolerances given must not be continuous in any direction for more than five times the nominal stone dimension nor for an area greater than 200 square feet of the structure surface.

NEATLINE TOLERANCES

MATERIAL ABOVE NEATLINE (inches) BELOW NEATLINE (inches)

Dike Stone 24 12

Bedding Material 6 6

Scour Protection Material 6 6

Dynamic Revetment 12 6

Filter Material Layer 6 6

b. The intention is that the work be built generally to the required elevations, slope and grade and that the outer surfaces be even and present a neat appearance. Remove and rework placed material not meeting these limits as directed by the Contracting Officer. Payment will not be made for rework or removal.

1.7 WORKING ENVIRONMENT

1.7.1 Site Related Weather and Tidal Conditions

a. Perform work with the understanding of hazards likely to arise from the weather conditions during the construction period. The following websites provide weather forecasts, records and reports and data concerning historic and oncoming storms and tides at the worksite:

https://tidesandcurrents.noaa.gov/waterlevels.html?id=9440581 &type=Tide+Data&name=Cape%20Disappointment&state=WA https://forecast.weather.gov/product.php?site=pqr&issuedby=PQR& product=CWF https://cdip.ucsd.edu/m/products/?stn=162p1

b. The favorable work season for marine construction is June through September. October and May can be a transition time from summer- to winter-like conditions. Marine weather and oceanographic conditions at the Mouth of the Columbia River between November and April can be extremely dangerous and the coastal environment (waves, wind, rain) is generally too dangerous for conducting marine construction activities at exposed locations. Even during summer, wave action at coastal inlets can pose risks for marine construction activities, during specific tidal phases or storm sequences.

Demonstrate that the work can be sequenced to account for the wave environment and tidal action at the project area.

c. Sea conditions may be hazardous for barge delivery at any time of year. Exercise extreme caution when scheduling barge shipments.

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Weather conditions can be particularly hazardous between the months of October and May.

1.7.2 Managing Work to Match Weather and Oceanographic Conditions

Implement prudent measures to reduce risks of damage to in-progress work elements, associated with periods of high tide, winds, waves, or storms.

Protect vulnerable work elements during active construction periods and during non-construction periods. Do not progress beyond a vulnerable in-progress work component without being able to secure that component before exposure to a damaging event (high tide, storm condition, etc).

Maximize opportunities to perform work on vulnerable work elements when favorable conditions are available. Include work tides and storm conditions into the schedule and work plan. Repair damage to any in-progress work.

PART 2 PRODUCTS

2.1 STONE

2.1.1 General

a. Acceptable stone used in the Contract work items must be composed of strong, hard, durable materials that will not slake or deteroriate on exposure to the action of water or atmosphere; does not contain cracks, joints, faults, vugs, seams or bands of minerals or deleterious materials which would result in breakage or reduction of specified stone weights or dimensions after placement. Acceptable stones must also be free of expansive or other materials which would cause accelerated deterioration by exposure to project climatic conditions.

b. Stone must have sufficiently uniform physical properties throughout so that all portions of the stone will meet the specified test requirements. Weak or inferior-appearing portions of any non-uniform type stone will be subjected to all testing necessary to determine that the stone will not be susceptible to splitting or differential weathering. Stone containing an inferior rock material portion that does not meet the specified test requirements will be rejected as unsatisfactory. Igneous flow, volcanic breccias and sedimentary rocks have not performed well and are considered unsuitable for use.

c. The stone must be clean, sharp-edged, and the longest dimension of any stone must not exceed three times its shortest dimension. It is intended for scour protection stones to be blocky in overall shape.

Due to the nature of the repairs, avoid producing scour protection stones which are dominant in a single dimension (i.e. slabby or tabular).

2.1.1.1 Sampling, Testing, and Acceptance of Stones

a. Quarry Documentation/Stone Testing. Determine the acceptability of stone by laboratory tests, geologic examination, and service records.

Provide satisfactory test results dated within the last five years or service records from other Corps of Engineers (COE) projects to determine the acceptability of the stone source. Previous test results must have used a representative sample, as outlined in the "Sampling" paragraph below, and demonstrate the same testing requirements as outlined in paragraph EVALUATION TESTING OF STONE. When these records

SECTION 35 31 19.00 25 Page 9 are not available, test representative samples as specified to ensure that the stones are durable and suitable for use in the work.

Laboratory tests which the stones must be subjected to include all required tests described in paragraph EVALUATION TESTING OF STONE as may be necessary. Perform testing to determine conformance with the requirements for acceptance or rejection of stones proposed for use and to determine stone classification at the Contractor's expense at a Corps-validated testing laboratory. A list of Corps-validated laboratories will be provided at the Pre-construction conference.

b. Sampling. In the absence of quarry documentation as required above, select representative samples of each different type of stone proposed for use from each proposed source. Perform sample selection in the presence of the COR or designee. Provide the Government 14 calendar days notice before the required COR witnessing of the stone sample selection. Samples of each type of stone from each source must consist of enough material to complete all tests as required by the government. The presence of the COR or designee during the stone sample selection does not relieve the Contractor of the responsibility to select representative samples from the quarry for testing.

c. Testing. Perform testing to determine conformance with the requirements for acceptance or rejection of stones proposed for use and to determine stone classification. Laboratory tests include all required tests described in paragraph EVALUATION TESTING OF STONE.

d. Separate tests must be made for each different stone type.

Satisfactory Contractor documentation or laboratory results on stone samples does not constitute approval of all stone from the quarry and in no way changes the requirements for obtaining, developing, and maintaining a satisfactory source of stones. Throughout the duration of this Contract, the Government may sample and test stones proposed for use and delivered to the jetty storage area. No Contract time extension will be granted because materials fail to meet the specification requirements. Stones must meet all testing requirements described herein as well as the geologic examination described in the paragraph ACCEPTANCE OF MATERIALS. Should the physical or chemical properties of a stone or rock type from an individual source vary, as determined by visual inspection, field testing and laboratory testing, the Contractor may be required to re-do some or all of the required tests for acceptance of that stone or rock type. The Contractor is responsible for the cost of all re-tests.

e. Failure of Stones. Remove stones failing to meet specific requirements from the off-loading facility or the stockpile area. Only approved materials or stones may be placed in the jetty.

2.1.1.2 Evaluation Testing of Stone

Conduct the evaluation tests listed below, performed on stone samples collected from the proposed source. The quarry investigation must be performed by a registered geologist or registered engineer. The laboratory to perform the required testing must be validated based on relevant paragraphs of ASTM D3740, and no work requiring testing will be permitted until the laboratory has been inspected and validated. A copy of the documents, provided by the Materials Testing Center (MTC) at CEWES or other governmental agency, that validates that the laboratory can perform the required tests. The individual tests must be listed for which the validation covers along with the date of the inspection.

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a. All test results reported by the validated testing laboratory must be considered as exact, regardless of any permissible variance that may be established by test procedures for determining acceptability of stone furnished under this Contract.

b. Samples. Samples of stone from a source not listed at the end of this Section must be taken by a representative of the Quarry under the supervision of the Contracting Officer for testing and acceptance prior to delivery of any stone from this source to the site of the work. Information provided with the samples must include the location within the quarry from which the sample was taken along with a field examination of the quarry. The field examination must include the information outline in ASTM D4992, paragraph 7. Samples must consist of enough mass to perform all tests as specified in section EVALUATION TESTING OF STONE. If the source is an undeveloped quarry, or if the operation has been dormant for more than one year such that fresh samples are not available, expose fresh rock as deemed acceptable for sampling by USACE Geologist and COR. The Contracting Officer may also require documentation of subsurface exploration of an undeveloped quarry in order to determine whether or not sufficient reserves are available. The samples must be shipped at the Contractor's expense to a laboratory validated by the government to perform the required tests.

c. Each stone must meet all the following test requirements for quality:

Test Requirement

Unit Weight Not less than 165 pcf

Absorption Not more than 5.0 percent

Abrasion - 500 revolutions

Not more than 18.0 percent loss (by weight)

Magnesium Sulfate Soundness - 5 cycles

Not more than 15.0 loss (by weight)

Accelerated Expansion Not more than 15.0 percent breakdown (by weight) or piece count

(1) Unit Weight and Absorption. Provide satisfactory test results and service records from within the previous five years of contract award date. If such records are not available, determine the unit weight (weight per cubic foot) by multiplying the bulk-saturated-surface-dry (BSSD) specific gravity by 62.4 pounds per cubic foot. Specific gravity and absorption must be determined in accordance with ASTM C127 (Modified) as follows:

(a) The test sample must consist of about 5kg of generally cubical pieces of stone passing the 2-inch and retained on the 1-1/2 inch standard square mesh sieve sizes.

(b) The test pieces must be laboratory prepared by jaw crushing or chipping.

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(2) Abrasion. Provide satisfactory test results and service records within the last five years; if not available, determine the abrasion loss in accordance with ASTM C131/C131M (Modified) as follows:

(a) The test sample must consist of the same size and gradation

(b) The abrasive charge used must comply with that used for Grading "A".

(c) The test sample must be subjected to 500 revolutions.

(3) Magnesium Sulfate Soundness. Provide satisfactory test results and service records within the last five years; if not available, the test sample must consist of 5± kg of rock pieces passing the 2-inch and retained on the 1-1/2 inch sieve, prepared as specified. The test is based upon ASTM C88 (Modified). Conduct the test through five cycles, which requires two to three weeks to complete.

(4) Accelerated Expansion. Provide satisfactory test results and service records within the last five years; if not available, the test sample must consist of 5± kg of rock pieces passing the 2-inch and retained on the 1-1/2 inch sieve, prepared and tested in accordance with Testing Procedure COE CRD-C 148(Modified).

Compute the test results by dividing the number of pieces that break down by the number of pieces in the original test sample.

Failure or breakdown is defined as any piece separating into two or more pieces or losing sufficient surface material to allow it to pass through the 1-1/2 inch sieve. The test period is 15 days.

(5) Petrographic Examination. Provide satisfactory test results and service records from within the previous five years of Contract award date. If such records are not available, evaluate stone in accordance with ASTM C295/C295M which must include information required by ASTM D4992, paragraph 10. COE CRD-C 148 must be used to perform Ethylene glycol tests required on rocks containing smectite as specified in ASTM D4992 and on samples identified to contain swelling clays. Acceptable stone must show absence of weakness or materials that could result in significant stone alteration and reduction in durability.

2.1.1.3 Gradation Test

a. Perform a gradation test or tests on the stone at the quarry. Take the sample in the presence of the Contracting Officer. Notify the Contracting Officer not less than 14 calendar days in advance of each test. Perform gradation test in accordance with either Method "A" or Method "B" from ASTM D5519. Perform at least one gradation test per 5,000 tons of each size of stone material placed, but not less than one test must be performed for each size of stone placed.

b. The sample must be collected in a random manner which will provide a sample that accurately reflects the actual gradation arriving at the jobsite. Failure of the test on the initial sample and on an additional sample will be considered cause for rejection of the quarry and quarry process, and all stone represented by the failed tests must

SECTION 35 31 19.00 25 Page 12 be set aside and not incorporated into the work. Any additional tests required because of the failure of an initial test sample will not be considered as one of the other required tests. If collected by the truckload, each truckload must be representative of the gradation requirements. Certification and test results must represent the stone shipped from the quarry. Certification and tests results must be received by the Contracting Officer at the jobsite before the stone is used in the work.

c. The Contracting Officer may direct additional testing of the stone at the project site if the stone appears, by visual inspection, to be out of gradation. Perform additional tests on in-place materials at the locations directed, or on random loads selected by the Contracting Officer. In-place test areas must be not less than 12 by 12 feet and include the full thickness of the placed stone layer, without disturbing or including the underlying material and must meet the minimum sample size specified above. Each pit excavated for an in-place test sample must be refilled and reworked to provide a surface void of signs of disturbance. If the gradation test fails, additional gradation tests will be required at the Contractor's expense to delineate the limits of unacceptable stone. The additional gradation tests will not count as part of the minimum number of gradation tests required. The unacceptable stone must either be reworked to bring the stone within the specified gradation or the stone must be removed from the project site as determined by the Contracting Officer. The Contracting Officer may direct this testing under FAR 52.246-12 Inspection of Construction. Provide all necessary screens, scales and other equipment, and operating personnel, to grade the sample.

2.1.1.4 Stone Stockpile

Storage of stone at the worksite is not to be confused with off-site stockpiling of stone. If the Contractor elects to provide off-site stockpiling areas, the Contracting Officer must be notified of all such areas. The Contractor's stockpile must 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 must 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 must be a maximum of 6 feet high. After being stockpiled, any stone that has become contaminated with soil or refuse must not be put into the work unless the contaminating material has been removed from the stone prior to placement.

a. Worksite Stockpile. Place stone delivered to the work sites, which requires temporary storage landward of top of slope, in a container suitable for storing the stone without waste. A sand-clay-gravel or crushed stone pad may be constructed for the storage area and removed on completion of the work. If the sand-clay-gravel or crushed stone pad method is used, ensure the pad has a minimum thickness of at least 6 inches. The container or sand-clay-gravel or crushed stone pad method is subject to approval prior to delivery of the stone. Upon completion of the work, the storage areas must be cleaned of all storage residues and returned to their natural condition. Temporary storage of stone at the worksite will be allowed, provided the stockpile toe of the stone is never in contact with the water's edge, and the amount must not exceed 200 T unless otherwise approved.

b. Off-site Stockpile. In areas where stone is stockpiled for

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ODOT CLASS 50 RIPRAP OR EQUIVALENT

BEDDING MATERIAL

ODOT Class 200 riprap or equivalent

Scour Protection Blanket placement, the area must have excess rock removed prior to completion of work. All rock and spalls greater than 3 inches in diameter must be removed. Where rocks may have become buried due to soft ground or operation of the equipment, the rock must be put in a disposal area.

After the rock has been removed, the storage area must be graded, dressed, and filled to return the ground surface as near as practical to the condition that existed prior to construction.

2.1.2 Stone Gradation

Use only quarried stone of the quality that is specified in section EVALUATION TESTING OF STONE. Ensure dike stone placed for the dike conform to the gradations outlined in Table 1 below. Dike bedding material will be composed of ODOT Class 50 riprap or equivalent as outlined in Oregon Department of Transportation Standard Specification for Construction (OSSC, 2018), paragraph 00390.11.

TABLE 1 - DIKE STONE, Min. Unit Weight 165 pcf

PERCENT BY WEIGHT (SSD) LIMITS OF STONE WEIGHT, LB.

20 1500 - 2000

30 750 - 1500

40 200 - 750

10 0 - 200

2.2 DYNAMIC REVETMENT MATERIALS

2.2.1 General

2.2.1.1 Construction Plan

Prepare a Dynamic Revetment Construction Plan. The plan must contain but not be limited to describing the staging, equipment, construction sequencing, and placement techniques.

2.2.1.2 Quarry Source

Submit in writing the source or combination of sources that is proposed to furnish the material. It is the Contractor's responsibility to determine that the source or combination of sources selected is capable of providing the quality, quantities, and gradations for the materials needed.

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2.2.1.3 Acceptance of Materials

The quarry source(s) must be approved by the Government prior to any work on the revetment. Acceptance of a source is not to be construed as acceptance of all material from that source. The right is reserved to reject materials from certain localized areas, zones, strata, or channels, when such materials are unsuitable for stone as determined by the Contracting Officer or their designee.

2.2.1.4 Material Types

The dynamic revetment must include two classifications of material; filter material, and cobble. Submit lab test and gradation reports from a Corps validated laboratory for all material classifications to be used for the dynamic revetment; indicate that the appropriate gradation for all material has been met. Sieve analysis must be determined according to AASHTO T 27 and ASTM D2488. Rounded cobble material must meet OSSC test requirements, Section 00390.11(b) and meet the gradations as indicated in the table below. Filter material must meet OSSC test and gradation requirements, Section 02630.10(a) and (c) respectively.

2.2.1.5 Bulk Density Testing

The bulk density of each material type must be determined by weighing a container holding a known volume of material of each required gradation at the moisture content found in the quarry stockpiles. The testing must be accomplished on no less than 10 cubic yards of each material type. The testing must be witnessed and be agreed upon by both Contractor and the Government. Results of the tests must be converted to units of tons per cubic yard for the purposes of measurement and payment.

2.2.1.6 Gradation Reports

Gradation reports must include sieve analysis showing the weight of the dry sample, sieve number, sieve opening size, sum of weight retained, percentage retained (by weight), and the percentage passing (by weight).

2.2.1.7 Control Sample

Representative sample piles containing at least 10 cubic yards of material meeting the gradation requirements for cobble and bedding classifications must be maintained at a satisfactory location at both the quarry and the job site for frequent visual comparison purposes for judging the gradation of the material supplied.

2.2.1.8 Sampling and Testing Assistance

Any difference of opinion between the Contracting Officer and the Contractor must be resolved by dumping and checking the gradation of two random truckloads of rock. Mechanical equipment, a sorting site, and labor needed to assist in checking gradation must be provided by the Contractor at no additional cost to the Government.

2.2.1.9 Testing Frequency

All material classifications must have indicated tests and gradations run prior to initial delivery.

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2.2.1.10 Material Composition

Bedding must consist of materials that have been processed from naturally occurring gravels or manufactured from quarry stone. Cobble must be clean and rounded river rock free of silt and clay, or other objectionable coatings. Materials must not contain any organic material

2.2.2 Filter Material

Dynamic Revetment Filter material must conform to Oregon Department of Transportation Standard Specification for Construction (OSSC) paragraph 02630.10, Table 02630-1 for 1"-0 aggregate. Filter must consist of materials that have been processed from naturally occurring gravels or manufactured from quarry stone. Materials must not contain any organic material

2.2.3 Cobble

Cobble must be clean and rounded river rock free of silt and clay, or other objectionable coatings. Materials must not contain any organic material. Dynamic Revetment cobble layer to use well-graded, 1" to 10" rounded cobbles with the following gradation:

Screen Size Percent Passing

10" 100 percent

8" 80 percent - 90 percent

6" 55 percent - 65 percent

4" 30 percent - 40 percent

2" 10 percent - 20 percent

1" 0 percent - 5 percent

0.25" 0 percent - 1 percent

PART 3 EXECUTION

3.1 TESTS AND INSPECTIONS

3.1.1 Pre-Production

3.1.1.1 Bulk Specific Gravity of Stone

Submit a copy of bulk specific gravity test results for each gradation range of stone proposed to be furnished at least 30 calendar days in advance of shipment of stone to the work site. The information must be furnished prior to preparation of pre-production demonstration stockpiles. Quantity determinations are contingent upon the range of bulk specific gravity (saturated surface dry (SSD) basis) of stone to be

SECTION 35 31 19.00 25 Page 16 supplied. Therefore, during the process of selecting a source or sources of stone for the project, make an investigation to determine the lowest and highest bulk specific gravity (SSD) of stone available at the source or sources proposed to be utilized for each gradation range of stone.

Perform tests at a Government approved testing laboratory. Submit the testing results in accordance with paragraph SUBMITTALS. Test results which display an extraordinarily wide range of values may necessitate additional testing to determine whether the source contains strata with stones of an acceptable range of bulk specific gravity.

3.1.1.2 Material Quality

Before selecting a source for preparation of a demonstration stockpile, be reasonably certain that the source is capable of meeting the quality and source requirements specified in paragraphs SOURCES and EVALUATION TESTING OF STONE, including their respective subparagraphs.

3.1.1.3 Borderline Material Quality

If the Contracting Officer's evaluation of a demonstration stockpile results in not being able to determine by visual examination whether the material is acceptable or unacceptable, the Contracting Officer will select at least one but not more than three representative stones from the demonstration stockpile to be prepared for shipment to the Government's laboratory for testing in accordance with paragraph EVALUATION TESTING OF STONE. For specified stone sizes of less than 2,000 pounds but more than 500 pounds, individual samples must be the size of the largest stone specified for the size range. Samples of stone groupings with a maximum size less than 500 pounds must contain at least two stones representative of the higher limit of the stone weights specified. In addition, the sample must be representative of the gradation specified and the minimum weight of the total sample must be not less than 500 pounds. The sampling and testing procedures must be repeated for each strata being quarried.

Ship the samples to the laboratory as specified in paragraph EVALUATION TESTING OF STONE. If the laboratory testing reveals the materials are unacceptable, submit a replacement source for approval and proceed with the demonstration stockpile procedures anew.

3.1.2 Reporting

Reporting must be in accordance with paragraph GRADATION TEST.

3.1.3 Placement Survey

Submit Post-Placement Surveys for enrockment elevations. Both must be within tolerances of neatline upon completion.

3.2 STONE PLACEMENT

a. Place Dike Stone to the grades and neatlines shown in the Contract drawings. Place an 24 inches layer of Bedding Material on existing grade prior to stone placement in locations where Dike Stone would otherwise be placed on bare sand. Place stone to ensure a homogeneous mass. Do not place stone by methods which tend to segregate the particle sizes within the layer. Materials that do not meet the specified requirements for size, quality, or distribution of sizes must be removed and replaced with suitable materials at no additional cost to the Government. Compaction of material placed will not be required, but the layer must be finished to present an adequately even

SECTION 35 31 19.00 25 Page 17 surface.

b. Between Station 1+00 and 13+50, work must be completed in one season and proceed westward from Station 1+00 and ending at Station 13+50. As the repair template is constructed in this direction, scouring of in-situ sand is expected. Scour along the progressing end of the enrockment may increase as the work extends past station 4+00.

Place additional scour protection blanket material over the repair template footprint as required to compensate for scour and maintain grades shown in the Contract drawings. Execute a deliberate and timely progression of enrockmemnt work along station 1+00 to 13+50 to mitigate the effects of scour. A shorter duration work sequence along station 1+00 to 13+30 will realize less scour and need for additional stone material than a longer duration work sequence.

c. For existing grade that is below MLLW, the stone must be placed in approximately uniform layers not exceeding 4 feet in thickness. Each layer must be carried the entire length of the dike out to Station 13+00 and low areas and gaps must be brought up to the desired elevation before proceeding with the next lift. That portion of the dike above the water may be placed in one lift. When scouring of the river bed occurs, the Contractor must blanket the center 10 foot width of the dike base for the entire length of the dike with stone to a depth of 4 feet before placing the remainder of the stone for the dike.

d. The Contractor is responsible for compensating for any settlement or displacement of the foundation that occurs while placing dike materials on native ground.

3.2.1 Dynamic Revetment

a. Place the filter material on the sand at foundation grade as shown in the plans. Wood or other debris will need to be removed from the work area prior to placement. Placing of material by methods that will tend to segregate particle sizes or overly compress the material will not be permitted. Placed bedding filter material must be finished to present a reasonable even surface free from abrupt ridges, humps, or depressions. The nominal in-place thickness of the filter layer is 9 inches. Do not compact nor drive equipment on top of the filter material after it has been placed.

b. Place the cobble material on top of the filter material as shown.

Placing of material by methods that will tend to segregate sizes, displace, or overly compress the underlying material will not be permitted. Cobble material must be finished to present a reasonable even surface free from abrupt ridges, humps, or depressions. Do not compact nor drive equipment on top of the cobble material after it has been placed.

c. Place material to the established neat lines and grades shown or as directed, in accordance with construction tolerances specified in Section CONSTRUCTION TOLERANCES. Either extreme of such tolerance must not be continuous over an area greater than 200 square feet.

3.2.2 Woody Debris

Set aside and do not incorporate any encountered logs, driftwood, or other debris into the dike cross section.

SECTION 35 31 19.00 25 Page 18

3.2.3 Equipment

Equipment must be capable of placing stone without dropping the stone in such a manner to displace the underlying material. Stone placing equipment must have adequate safe capacity to construct the dike template to the specifications outlined above. The selected equipment must be capable of placing the stone near its final position before release.

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