140R6024R0005_0002_0002.pdf

(x)

140R6024R0005 x x

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 electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGEMENT 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 letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

x

R60

Billings MT 59101 2021 4th Avenue North Missouri Basin Regional Office Bureau of Reclamation

07/03/20240002

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

12. ACCOUNTING AND APPROPRIATION DATA (If required) is not extended.is extended, Items 8 and 15, and returning

Offers 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

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

FACILITY CODE CODE

10B. DATED (SEE ITEM 13)

10A. MODIFICATION OF CONTRACT/ORDER NO.

9B. DATED (SEE ITEM 11)

9A. AMENDMENT OF SOLICITATION NO.

CODE

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code)

7. ADMINISTERED BY (If other than Item 6)CODE 6. ISSUED BY

PAGE OF PAGES

4. REQUISITION/PURCHASE REQ. NO.3. EFFECTIVE DATE2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO. (If applicable)

1. CONTRACT ID CODE

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

06/12/2024

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority) appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

E. IMPORTANT: Contractor is not is required to sign this document and return __________________ copies to the issuing office.

ORDER NO. IN ITEM 10A.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

Gaden's Point South Shoreline Riprap, Belle Fourche, South Dakota

Please see the following continuation pages for this Amendment No. 0002 in its entirety.

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)15A. NAME AND TITLE OF SIGNER (Type or print)

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 15B. CONTRACTOR/OFFEROR 16C. DATE SIGNED

(Signature of person authorized to sign) (Signature of Contracting Officer)

Darlene Dillon

STANDARD FORM 30 (REV. 11/2016)

Prescribed by GSA FAR (48 CFR) 53.243

Previous edition unusable

Except as provided herein, all terms and conditions of the document referenced in Item 9 A or 10A, as heretofore changed, remains unchanged and in full force and effect .

Solicitation No. 140R6024R0005 Amendment No. 0002

Description of amendment details:

1) In Part I- The Schedule, remove Section 31 23 02 in its entirety, and substitute therefor with the attached revised Section 31 23 02.

2) In Part I- The Schedule, remove Section 31 37 00 in its entirety, and substitute therefor with the attached revised Section 31 37 00.

3) In Part I- The Schedule, remove Section 32 92 20 in its entirety, and substitute therefor with the attached revised Section 32 92 20.

For convenience, essential changes on the revised solicitation pages are indicated by a vertical line within the margin, whereby the lines or paragraphs are changed from the previous version.

However, all portions of the revised solicitation pages shall apply, whether changes thereon have or have not been indicated.

Acknowledgement: See Block 11 above regarding acknowledgement by offerors to this amendment. The Government requires acknowledgement of this amendment and all amendments. (Please See Block 19 of the Standard Form 1442, on the original solicitation, ACKNOWLEDGEMENT OF AMENDMENTS).

Receipt of Proposals: The date for receipt of proposals remains July 23, 2024. The hour for receipt of proposals is 3:00 PM (Mountain Daylight Time-Denver).

Third Party: If you have provided a copy of this solicitation to another company or person, please forward this amendment accordingly.

Gaden’s Point South Shoreline Riprap Amendment 0002

Compacting Earth Materials Revised 31 23 02 - 1

SECTION 31 23 02

COMPACTING EARTH MATERIALS

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Cost:

1. Include cost of compacting earth materials in prices offered in the Price Schedule for excavation. This includes compacting embankments, compacting backfill, compacting earth lining, and for other items of work where earth materials are required to be compacted.

a. Includes furnishing water and moistening materials

b. Includes Contractor Quality Testing.

1.02 DEFINITIONS

A. Use definitions from ASTM D653.

B. Control Fraction: The portion of a soil sample consisting of particles smaller than a designated sieve size. The fraction is used to compare in-place unit weight with standard laboratory unit weight. The control sieve size depends on the laboratory test used to determine laboratory maximum density.

C. C-Value: The ratio expressed as a percentage of (1) in-place unit weight at fill moisture content to (2) the wet unit weight of a laboratory-compacted specimen prepared at fill moisture content as determined by the rapid method of construction control in accordance with ASTM D5080. The C-Value is a comparison of compactive effort of field compaction equipment to standard laboratory compactive effort.

D. D-value: The ratio expressed as a percentage of (1) in-place wet unit weight at fill moisture content to (2) laboratory maximum wet unit weight as determined from a compaction curve constructed at fill moisture content as determined by the rapid method of construction control ASTM D5080. The D-value is the equivalent of percent compaction in accordance with ASTM D698.

E. Percent Compaction: The ratio expressed as a percentage of the in place unit dry unit weight to the laboratory maximum dry unit weight

F. Special compaction: Compaction close to structures or in spaces not accessible by standard width rollers.

Revised 31 23 02 - 2

1.03 REFERENCE STANDARDS

A. ASTM International (ASTM)

1. ASTM D653-14 Terminology Relating to Soil, Rock, and Contained Fluids

2. ASTM D698-12 Laboratory Compaction Characteristics of Soil Using Standard Effort (12,400 ft-lbf/ft3 (600 kN-m/m3))

3. ASTM D1140-14 Amount of Material in Soils Finer than the No. 200 (75-µm) Sieve

4. ASTM D2216-10 Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass

5. ASTM D2487-11 Classification of Soils for Engineering Purposes (Unified Soil Classification System)

6. ASTM D2488-09a Description and Identification of Soils (Visual-Manual Procedure)

7. ASTM D4318-10 Liquid Limit, Plastic Limit, and Plasticity Index of Soils

8. ASTM D4546-14 One-Dimensional Swell or Collapse of Cohesive Soils

9. ASTM D4647/D4647M-13 Identification and Classification of Dispersive Clay Soils by the Pinhole Test

10. ASTM D4718-15 Correction of Unit Weight and Water Content for Soils Containing Oversize Particles

11. ASTM D4914-16 Density of Soil and Rock in Place by the Sand Replacement Method in a Test Pit

12. ASTM D5030-13a Density of Soil and Rock in Place by the Water Replacement Method in a Test Pit

13. ASTM D5080-08 Rapid Determination of Percent Compaction

14. ASTM D6572-13 Determining Dispersive Characteristics of Clayey Soils by the Crumb Test

15. ASTM D6913-04(2009) Particle-Size Distribution (Gradation) of Soils Using Sieve Analysis

16. ASTM D6938-15 In-Place Density and Water Content of Soil and Soil-Aggregate by Nuclear Methods (Shallow Depths)

Revised 31 23 02 - 3

17. ASTM D7382-08 Determination of Maximum Dry Unit Weight and Water Content Range for Effective Compaction of Granular Soils Using a Vibrating Hammer

B. Bureau of Reclamation (USBR)

1. USBR Guidelines for Earthwork Construction Control Testing of Gravelly Soils, Earth Sciences and Research Laboratory, Technical Service Center, Bureau of Reclamation, Denver, Colorado, September 2008.

1.04 SUBMITTALS

A. Submit the following in accordance with Section 01 33 00 - Submittals.

B. RSN 31 23 02-1, Test Results:

1. Results of tests listed in Table 31 23 02A – Contractor Materials Testing Requirements and Frequency.

2. Include test date, time, location and person performing tests.

3. Notify COR within 2 hours if testing does not meet specified requirements.

1.05 AMBIENT CONDITIONS

A. Do not place and compact soil under following conditions:

1. Rain that creates puddles in clayey or silty materials.

2. Heat or wind or both that dries material below specified moisture conditions.

3. Ice, frost, or snow pockets are visible in soil being placed or in underlying materials.

B. Ambient air temperature below freezing may make placement and compaction operations difficult.

1. Minimize interruptions of operations.

2. Continuous operations may be required to eliminate freezing of materials.

3. Obtain COR approval, before performing operations when ambient air temperatures are below freezing.

4. Cease operations when placed materials are freezing or below freezing.

PART 2 PRODUCTS

2.01 CLASSIFICATION

A. When required, classify earth materials using the Unified Soil Classification System (USCS) according to ASTM D2487 or ASTM D2488.

1. Gradation tests for classification: ASTM D9913 or D1140.

Revised 31 23 02 - 4

2. Atterberg limits testing for classification: ASTM D4318.

2.02 SOIL TYPES

A. Clean Fill:

1. Any soil except soils with classifications Peat (PT), Organic Silts and Organic Clays (OL and OH), or Elastic Silt (MH) per ASTM D2487.

2. Free of roots, stumps, limbs, vegetation, organic matter, and ice.

3. Does not contain construction debris, scrap materials, refuse, man-made wastes, or chemical or hydro-carbon contamination.

B. Do not use frozen soils.

C. Special Gradations and Plasticity.

1. In some cases, such as embankment materials, embedment for buried pipe, special gradations and/or plasticity characteristics may be required. These requirements are in the applicable Section.

2.03 DESIGNATION OF SOILS FOR COMPACTION

A. Requirements for lift thickness, method of compaction, and method of determining degree of compaction depends on whether soil is considered to be silty or clayey, cohesionless, or cohesionless containing some silt and clay.

B. Silty or Clayey Soils:

1. Contains appreciable amounts of fines (more than 15 percent plastic fines or 30 percent non-plastic fines).

C. Cohesionless Soils:

1. Contains few fines (less than 5 percent fines).

D. Cohesionless Soils Containing Some Clay and Silt:

1. Contains some clay and silt (between 5 percent fines and 15 percent plastic fines or 30 percent non-plastic fines).

2.04 MAXIMUM PARTICLE SIZE

A. Soil for compacted backfill and embankment:

1. Maximum particle size limitations described in appropriate Sections for backfill against specific structures and zoned embankment materials.

2. Otherwise, no cobbles larger than 5 inches or boulders.

Revised 31 23 02 - 5

PART 3 EXECUTION

3.01 SURFACE PREPARATION

A. Clear, grub in accordance with Section 31 11 00. Strip in accordance with Section 31 14 10.

B. Prepare surface so that first compacted lift will be placed on firm, stable base. Compact surface to specified compaction, if necessary.

C. For water-retaining compacted fill, scarify and moisten surface to provide satisfactory bonding surface before placing layer of material to be compacted.

3.02 SOIL MOISTURE CONTENT

A. Moisten or aerate material, as necessary, to provide moisture content that will readily facilitate obtaining specified compaction. Add water to soil only in increments that will permit moisture content to be uniform and homogenous throughout each layer after mixing.

B. Silty and Clayey Soils and Cohesionless Soils Containing Some Silt and Clay:

1. Add no more than 2 percent water to fill by sprinkling just prior to compaction when fill is clayey and contains dry clods of clay.

a. If clayey borrow soil is more than 2 percent below optimum moisture, pre-conditioning and curing may be required to obtain uniform and homogenous distribution of moisture in the clods.

b. Use of disks, harrows, or rakes may be required to blend moisture in the borrow area.

2. Moisture content during compaction:

a. Soils controlled by impact compaction

1) Not greater than 2 percentage points wet or not less than 4 percentage points dry of optimum moisture content.

b. Soils controlled by the vibrating hammer.

1) Within the water content range for effective compaction as determined by ASTM D7382.

C. Cohesionless Soils:

1. Add water during compaction, as necessary, since these soils are free-draining.

D. Determine moisture with one of the following:

1. ASTM D6938.

a. Correct moisture from the nuclear gage for gauge error for the specific soils tested and the moisture content of the total material may require adjustment for the control fraction (ASTM D4718).

Revised 31 23 02 - 6

3.03 PLACEMENT

A. Place soils to be compacted in horizontal layers.

B. If necessary, blend materials so that compacted fill is homogenous and free from lenses, pockets, streaks, voids, laminations, or other imperfections.

3.04 COMPACTION

A. Compact material with following methods and techniques appropriate to type of soil.

B. Silty or clayey material:

1. Compact with mechanical impact tampers, tamping rollers, vibrating pad foot rollers, rubber tire rollers, other suitable compaction equipment, or equipment travel.

a. Uniformly distribute equipment passes.

b. Compact in horizontal layers to compacted thickness of 6 inches or less.

2. Special compaction: Compact with hand held impact tampers, or small tamping equipment.

a. Uniformly distribute effort.

b. Compact in horizontal layers to compacted thickness of 4 inches.

3. Density:

a. Percent Compaction, minimum 90 percent.

C. Cohesionless free-draining material:

1. Compact with crawler-type tractors, vibrating drum rollers, surface plate vibrator, or similar equipment

a. Uniformly distribute equipment passes.

b. Compact in horizontal layers to compacted thickness of 12 inches or less.

2. Special compaction: Compact with hand held impact tampers, vibrating plate tampers, or small tamping equipment.

a. Uniformly distribute effort.

b. Compact in horizontal layers to compacted thickness of 6 inches.

3. Density:

a. Percent Compaction, minimum: 90 percent.

D. Cohesionless Soils Containing Some Silt and Clay:

1. Compact in accordance with either procedure above.

2. Density:

a. Percent Compaction, minimum: 90 percent

Revised 31 23 02 - 7

E. Demonstration:

1. Lift thicknesses may vary depending on equipment and methods. Before changing requirements in this Section, demonstrate that required density will be obtained.

3.05 MEASURE OF COMPACTION

A. Determine unit weight of soils in-place using one of the following methods:

1. Silty or Clayey and Cohesionless Soils:

a. ASTM D4914.

b. ASTM D5030.

c. ASTM D6938.

B. Determine soil compaction by one of the following.

1. Silty or clayey soils:

a. Percent Compaction:

1) Rapid Method: ASTM D5080.

2) Laboratory Compaction Test: Comparison of in-place dry unit weight of minus no. 4 sieve size control fraction to laboratory maximum dry unit weight as determined by ASTM D698, Procedure A.

2. Cohesionless soils:

a. Percent Compaction: In-place dry unit weight compared to the maximum dry unit weight determined by ASTM D7382.

3. Cohesionless Soils Containing Some Silt and Clay:

a. Use whichever testing procedure result requires higher in-place dry density.

C. Adjustment:

1. For soils with 5 to 30 percent oversized particles: In-place unit weight of minus

no. 4 size control fraction determined by screening gravel, washing, and determining mass and volume by assuming surface saturated dried moisture as outlined in ASTM D4718.

2. For soils containing greater than 30 percent oversized particles: Required D ratio or Percent Compaction may be adjusted in accordance with appropriate curve on Figure 3 in USBR Guidelines for Earthwork Construction Control Testing of Gravelly Soils.

3.06 CONTRACTOR FIELD QUALITY TESTING

A. Testing:

Revised 31 23 02 - 8

1. Independent testing laboratory shall perform sampling, testing, and reporting as required in Table 31 23 02A - Contractor Materials Testing Requirements and Frequency.

a. Independent testing laboratory shall meet requirements specified in Section 01 46 20 - Testing Agency Services.

2. Notify the independent testing laboratory and Government 24 hours before compaction work begins and 24 hours before significant change in compaction operations (major change in equipment or procedure used).

3. Notify the independent testing laboratory and Government immediately of equipment change due to breakdown, or re-deployment.

4. Testing Frequency:

a. At a minimum, perform test at frequencies specified in Table 31 23 02A - Contractor Materials Testing Requirements and Frequency.

b. Greater frequency of testing is normally performed at beginning of new work, new work crew, or new equipment.

c. After a successful work operation pattern is established, testing frequency may be performed at the minimum guidelines.

d. Perform additional tests at sites considered questionable by the Government; such as suspected incomplete compaction, surfaces that may have become excessively wet or dry since compaction, compacted surfaces torn up by subsequent equipment travel, or other similar circumstances. Frequency of additional testing is at discretion of the Government.

Revised 31 23 02 - 9

Table 31 23 02A – Contractor Materials Testing and Frequency

PROCEDURE TEST

STANDARD

STANDARD TITLE MINIMUM FREQUENCY OF

TESTING

Soil Classification

ASTM D2487 Classification of Soils for Engineering Purposes

As necessary to classify material to meet specification requirements or to index material for determining density by nuclear method. ASTM D2488 Description and

Identification of Soils

Moisture Content

ASTM D2216 Laboratory Determination of Water (Moisture Content of Soil and Rock by Mass.

With in-place density or as required to index material for determining density by nuclear method.

Laboratory Compaction (Standard Effort)

ASTM D698,

Procedure A.

Laboratory Compaction Characteristics of Soil Using Standard Effort

One test every 500 yd3

Minimum 1 or as material changes.

Oversized Correction

ASTM D4718 Correction of Unit Weight and Water Content for Soils Containing Oversize Particles

When oversize material is between 5 to 30 percent

Rock Factor USBR Guidelines for Earthwork Construction Control Testing of Gravelly Soils

When oversize material is greater than 30 percent

Nuclear Method

ASTM D6938 In-Place Density and Water Content of Soil and Soil- Aggregate by Nuclear Methods (Shallow Depth)

One test every 300 yd3

Minimum 1 test per day per compacted backfill operation, regardless of amount of material placed.

B. Contractor Support:

1. Provide timely access to areas for density testing and excavate and level an area in compacted material to provide a surface for testing.

a. Test fills compacted by sheepsfoot rollers one or two lifts below surface.

2. Government may select location of testing.

3. Dig test pits as requested to examine compacted soil against structures or pipe.

4. Backfill test pits to original requirements.

Revised 31 23 02 - 10

5. Provide warning lights, flags, or other safety devices as needed by testing personnel.

6. Provide adequate lighting for performing test if required because of darkness.

3.07 GOVERNMENT CONTRACT FIELD QUALITY ASSURANCE

A. The Government may perform test as required to verify contractor quality testing. If the Government performs quality assurance testing, provide support as required for contactor quality testing.

END OF SECTION

Riprap Revised 31 37 00 - 1

SECTION 31 37 00

RIPRAP

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Riprap:

1. Measurement:

a. Weight of material placed.

b. Weigh materials at state certified scale.

2. Payment: Ton price offered in Price schedule.

1.02 REFERENCE STANDARDS

A. ASTM International (ASTM)

1. ASTM C88-05 Soundness of Aggregates by Use of Sodium Sulfate or Magnesium Sulfate

2. ASTM C97-02(2008) Absorption and Bulk Specific Gravity of Dimension Stone

1.03 SUBMITTALS

A. Submit the following in accordance with Section 01 33 00 - Submittals.

B. RSN 31 37 00-1, Plan for Developing Quarry and Transporting Materials:

1. Location and extent of process areas and temporary stockpiles.

2. Methods of sorting, processing, loading, and temporary stockpile material.

3. Sediment control plan for quarry operations.

4. Material test reports.

C. RSN 31 37 00-2 Weigh Tickets

1. Weigh tickets for each load of rock delivered

PART 2 PRODUCTS

2.01 ROCK

A. Hard, dense, and durable.

1. Specific gravity, ASTM C97, minimum: 2.50.

Revised 31 37 00 - 2

2. Absorption, ASTM C97, maximum: 2 percent.

3. Loss, Sulfate Soundness, ASTM C88, maximum: 10 percent.

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

C. Shape:

1. Predominantly angular.

2. Maximum dimension not greater than 3 times minimum dimension.

D. Riprap Gradation:

1. Class C or D Riprap, as specified in Section 830.1, Table 1 of South Dakota Department of Transportation (SD DOT) Standard specifications for Roads and Bridges. https://dot.sd.gov/doing-business/contractors/standardspecifications/2015-standard-specifications

E. Cleared:

1. Stone from an approved commercial pit permitted by the State of South Dakota in compliance with South Dakota Codified Lw (SDCL) 45-6.

The government reserves the right to conduct inspections of quarry sites and quarries for historical and cultural properties.

PART 3 EXECUTION

3.01 AREAS TO RECEIVE RIPRAP

A. Sort flatter type rock for areas that are to be used as steps down riprap locations shown on drawings.

B. Place riprap to the outlines and thicknesses as shown on the drawings.

1. Tie into existing riprap will require contractor to ensure fabric is not shown.

2. Ensure that no soil is exposed when tying into existing riprap.

3. Coordinate with COR prior to tying into existing riprap.

3.02 PLACING

A. Bed riprap on geotextile or sand and gravel bedding as shown on drawings.

B. Rock in riprap need not be hand placed or compacted.

C. Place rocks so that larger rocks are evenly distributed and small rock fragments fill the spaces.

1. Include rock spalls or gravel in an amount to fill voids in riprap, but not in excess of an amount to be determined by the COR.

Revised 31 37 00 - 3

D. Dump and smooth by moving rocks into position so that material when in place is stable.

E. Placing riprap on geosynthetics:

1. Drop height, maximum: 1-foot.

2. Before placing riprap, demonstrate that placing technique will not damage geotextile or underlying geomembrane.

a. If the demonstration does not show that riprap can be installed without damaging geosynthetic materials, modify riprap placing technique.

b. Possible modifications to placing technique include reducing drop height, installing layer of sacrificial geotextile, or installing gravel cushion.

F. Begin riprap placement at toe and proceed up slope.

G. Leave no unreasonably large unfilled spaces within riprap.

H. Place sorted flatter rock in as to lock in place with surrounding riprap to mitigate movement from wave action.

3.03 STOCKPILING

A. Coordinate with the government COR within the use of site if stockpiling is necessary for this project.

Revised 31 37 00 - 4

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Seeding and Soil Supplements Revised 32 92 20 - 1

SECTION 32 92 20

SEEDING AND SOIL SUPPLEMENTS

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Seeding and Soil Supplements:

1. Measurement: Area along surface seeded as shown on the drawings, or directed by the COR.

2. Payment: Acre price offered in the Price Schedule.

a. Full payment will be made based on stand of turf.

1.02 DEFINITIONS

A. Pure live seed content: Weight of seed times percent purity times percent germination.

B. Stand of turf (grass)

1. 70% ground cover of the established species

1.03 SUBMITTALS

A. Submit the following in accordance with Section 01 33 00 - Submittals.

B. RSN 32 92 20-1, Seeding Plan:

1. Method and equipment used for seeding.

2. Date for seeding.

3. Mulch and fertilizer type and application equipment.

4. Qualifying experience for person responsible for supervision of seeding, for approval.

5. Names, addresses, and telephone numbers of references.

6. Name and address of seed suppliers.

C. RSN 32 92 20-2, Certifications:

1. Origin of seed.

2. Percent purity and germination.

3. Prohibited and restricted weed seed content.

1.04 DELIVERY STORAGE AND HANDLING

A. Seed containers:

Revised 32 92 20 - 2

1. Sealed.

2. Labeled:

a. Identify seed origin on label.

1) Intrastate shipping: In accordance with South Dakota State Seed Laws and Regulations.

2) Interstate shipping: In accordance with U.S. Department of Agriculture Rules and Regulations under the Federal Seed Act.

1.05 AMBIENT CONDITIONS

A. Do not seed or fertilize when ambient temperature is below 38 degrees F without approval of the COR.

B. Do not seed or fertilize when ground is snow covered.

C. Do not seed, fertilize, or mulch, or hydroseed when wind velocities prevent uniform application of materials or would drift materials.

PART 2 PRODUCTS

2.01 SEED

A. Weed seeds classified by State Seed Department:

1. Prohibited noxious weeds: None

2. Restricted noxious weeds: 0.5 percent maximum, by weight.

B. Seed mixture:

1. Purity, minimum: 85 percent.

2. Germination, minimum: 85 percent.

a. Germination test: Less than 1 year old at time of seeding.

3. Uniform mixture shown in Table 32 92 20A - Seed Mixture.

Common Name Seeding Rate (Pounds Pure Live Seed per Acre)

Intermediate Wheatgrass 15.0 Western Wheatgrass 15.0 Needle grass 5 Sweet Clover 1.5

2.02 FERTILIZER

A. Agricultural grade nitrogen fertilizer and phosphate fertilizer.

Revised 32 92 20 - 3

1. Nitrogen fertilizer: Urea (46-0-0).

2. Phosphate fertilizer: mono ammonium phosphate.

2.03 STRAW MULCH

A. Wheat or barley straw.

B. Free of mold or other evidence of decomposition.

C. Free from weed seed.

2.04 HYDROMULCH

A. Mat-Fiber Plus, manufactured by Mat Inc.,12402 Hwy 2, Floodwood, MN 55736, 1 -888- 477-3028; Spray Mulch X-80 manufactured by Pacific Wood Fibers, PO Box 2109, Redmond WA 98052; or equal, having the following essential characteristics:

1. Wood cellulose fiber.

2. No germination or growth inhibiting factors.

3. Dyed appropriate color to allow visual metering of application.

4. Evenly dispersed and suspended when agitated in water.

5. Forms blotter like ground cover that readily absorbs water and allows infiltration to underlying soil.

2.05 TACKIFIER

A. Mixture of at least three specially blended compatible hydrocolloids.

1. One hydrocolloid will act as a slippery agent during suspension.

2. Will form loose, long-chain-like film on drying.

3. No growth or germination inhibiting factors.

4. Hydrates and disperses in circulating water to form homogeneous slurry.

5. Equilibrium air dry moisture content at time of manufacture of 8 percent, plus or minus 2 percent.

6. Minimum water holding capacity: 6-1/2 times weight of dry material.

B. Hydrophilic colloids must be physiologically harmless to plant and animal life without phytotoxic agents. Colloids must be naturally occurring, silicate powder based, and must form a water insoluble membrane after curing. Colloids must resist mold growth.

Revised 32 92 20 - 4

PART 3 EXECUTION

3.01 SEEDBED PREPARATION

A. Complete prior to seeding and mulching or hydromulching.

B. Scarify or harrow and rake topsoil to minimum depth of three inches.

C. Remove stiff clods, lumps, roots, litter, stones, and other foreign material greater than 4 inches in size from the surface. Dispose of removed materials in accordance with Section 01 74 10 - Cleaning.

D. Fill or smooth topsoil surface to remove rills, gullies and depressions.

E. Protect prepared topsoil surfaces from erosion and washouts. Repair damaged surfaces as required.

F. Do not seed when ground is muddy, frozen, snow covered or in an unsatisfactory condition for seeding. If special conditions exist that may warrant a variance in the above seeding dates or conditions, submit a written request to the COR stating the special conditions and proposed variance. Apply seed within twenty four hours after seedbed preparation. Sow seed by approved sowing equipment. Sow one-half the seed in one direction, and sow remainder at right angles to the first sowing.

3.02 FERTILIZING

A. Apply nitrogen fertilizer uniformly at a rate of 30 pounds of nitrogen content per acre (65 pounds per acre of Urea).

B. Apply phosphate fertilizer uniformly at a rate of 50 pounds of P2O5 content per acre.

C. When fertilizer applied before seeding, disc or harrow fertilizer into top three inches of soil.

3.03 SEEDING

A. Apply seed and mulch by one of the following methods:

1. Broadcast seeding followed by mulching or hydromulching.

2. Drilling seed followed by mulching.

3. Hydroseeding followed by hydromulching.

4. Hydroseeding and hydromulching.

B. Apply seed mixture at rate specified in Table 32 92 20A - Seed Mixture.

C. Seed only when ambient temperature is above 38 degrees F, if below 38 degrees F approval of the COR is required.

Revised 32 92 20 - 5

3.04 BROADCAST SEEDING

A. Broadcast seed only in areas not accessible for drilling or hydroseeding.

B. Apply seed and fertilizer separately.

C. Mechanical broadcasting:

1. Equipment:

a. Centrifugal type.

b. Pull type similar to fertilizer spreader.

2. Designed and regulated to apply seed uniformly at proper rate per acre.

D. Hand Broadcasting:

1. By hand broadcaster.

2. By hand.

3. Uniformly applied.

E. Cover seed with soil to depth of 1/4-inch to 1/2-inch immediately after broadcasting.

1. Use hand rake or float.

2. Do not use log chain or similar device.

3.05 DRILLING SEED

A. Regulate drill to uniformly distribute seed at rate specified and cover with soil depth of 1/4-inch to 1/2-inch.

B. Apply seed and fertilizer separately.

C. Drill crosswise to general slope where possible to safely operate equipment.

3.06 MULCHING

A. Spread within 2 days of spreading seed.

B. Rate: 2 tons per acre uniformly spread

C. Anchor with threader.

1. Operate crosswise to slope.

2. Depth: 3 to 4 inches.

3. Interval: 6 to 12 inches across slope.

3.07 HYDROSEEDING

A. Seed slurry:

Revised 32 92 20 - 6

1. Mix to keep homogeneous.

2. Ingredients:

a. Water

b. Seed

c. Wood cellulose fiber mulch:

1) Rate: 1,000 pounds per acre at 10 percent moisture content.

2) Add to water slurry after seed.

d. Fertilizer may be applied with hydroseeding.

3. Maximum time between batching slurry and application: 1 hour.

B. Spray apply seed slurry mix uniformly.

C. Use mulch coloring as metering agent.

D. Apply seed slurry before mulch slurry.

3.08 HYDROMULCHING

A. Mulch slurry:

1. Mix to keep homogeneous.

2. Ingredients:

a. Water.

b. Tackifier.

c. Wood cellulose fiber mulch: 3,000 pounds per acre at 10 percent moisture content.

d. Nitrogen fertilizer may be applied with hydromulching.

3. Maximum time between batching slurry and application: 1 hour.

B. Spray apply mulch slurry mix uniformly.

C. Use mulch coloring as metering agent.

D. Apply mulch slurry within 24 hours after applying seed.

3.09 HYDROSEEDING AND HYDROMULCHING

A. Slurry:

1. Mix to keep homogeneous.

2. Ingredients:

a. Water

b. Tackifier

Revised 32 92 20 - 7

c. Seed

d. Wood cellulose fiber mulch:

1) Rate: 4,000 pounds per acre at 10 percent moisture content.

2) Add to water slurry after seed.

e. Fertilizer may be applied with hydroseeding.

3. Maximum time between batching slurry and application: 1 hour.

B. Spray apply slurry mix uniformly.

C. Use mulch coloring as metering agent.

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