AM0004.Solicitation.W912EE26BA001.pdf

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers is extended. is not extended.

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 items 8 and 15, and returning 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 ACKNOWLEDGMENT 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.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NUMBER AS DESCRIBED IN ITEM 14.

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

NUMBER IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

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

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

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

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

15B. CONTRACTOR/OFFEROR

(Signature of person authorized to sign)

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA

(Signature of Contracting Officer)

16C. DATE SIGNED

Previous edition unusable STANDARD FORM 30 (REV. 11/2016) Prescribed by GSA FAR (48 CFR) 53.243

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1. CONTRACT ID CODE PAGE OF PAGES

2. AMENDMENT/MODIFICATION NUMBER 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQUISITION NUMBER 5. PROJECT NUMBER (If applicable)

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

8. NAME AND ADDRESS OF CONTRACTOR (Number, street, county, State and ZIP Code) (X) 9A. AMENDMENT OF SOLICITATION NUMBER

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NUMBER

10B. DATED (SEE ITEM 13)

CODE FACILITY CODE

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

Reference Solicitation No. Block 14 (Description of Amendment/Modification):

W912EE26BA001, for Tate County, Mississippi, Mississippi Delta Headwaters Project, Bank Stabilization 17-01, is amended as follows:

Specifications Section 01 57 23.00 09 is revised. Specifications revised by this amendment have the notation "Revised by Amendment 0004" at the bottom of the page. Text added by this amendment is shown as underlined. Text deleted by this amendment is shown as overstruck.

The Bid Opening date is extended, from 22 January 2026 at 2:00 pm Central to 28 January 2026 at 2:00 pm Central.

All other terms and conditions remain unchanged.

Section 00 00 00 - Procurement and Contracting Requirements

The following changes have been made:

INFORMATION FROM TO

Response Due Date 22 Jan 2026 28 Jan 2026

Section 00 01 15 - List of Drawing Sheets

The attachments table has changed from:

Identifi er

Document Name

Document Description Reference Identifier

Date Line Item

Page N umbers

Docum ent Type

Provid ed Under Separa te Cover

0001 0001_Solicitati on.

Attachments.

26BA001

Supporting Technical Documentation

0001 16 Dec

15 Attach ment

No

0002 0002_Solicitati on.

Specifications.

26BA001

Specification 0002 16 Dec

151 Attach ment

No

0003 0003_Solicitati Drawings 0003 16 Dec 24 Attach No

W912EE26BA0010004

on.Drawings.

26BA001

2025 ment

0004 0004_AM0002.

Solicitation.

Specifications.

26BA001

Specification AM0002 12 Jan

86 Attach ment

No

0005 0005_AM0003.

Solicitation.

Drawings.

26BA001

Drawings AM0003 14 Jan

Attach ment

No

To:

Identifi er

Document Name

Document Description Reference Identifier

Date Line Item

Page N umbers

Docum ent Type

Provid ed Under Separa te Cover

0001 0001_Solicitati on.

Attachments.

26BA001

Supporting Technical Documentation

0001 16 Dec

15 Attach ment

No

0002 0002_Solicitati on.

Specifications.

26BA001

Specification 0002 16 Dec

151 Attach ment

No

0003 0003_Solicitati on.Drawings.

26BA001

Drawings 0003 16 Dec

24 Attach ment

No

0004 0004_AM0002.

Solicitation.

Specifications.

26BA001

Specification AM0002 12 Jan

86 Attach ment

No

0005 0005_AM0003.

Solicitation.

Drawings.

26BA001

Drawings AM0003 14 Jan

5 Attach ment

No

0006 0006_AM0004.

Solicitation.

Specs.

26BA001

Specification AM0004 20 Jan

16 Attach ment

No

The following contract documents were added:

0006_AM0004.Solicitation.Specs.26BA001

The following contract documents Page Counts were changed:

DOCUMENT PAGE COUNTS

DOCUMENT NAME FROM TO

0006_AM0004.Solicitation.Specs.26BA001 none 16

W912EE26BA001

PROJECT TABLE OF CONTENTS

DIVISION 00 - PROCUREMENT AND CONTRACTING REQUIREMENTS

00 80 00.00 09 SPECIAL CONTRACT REQUIREMENTS

DIVISION 01 - GENERAL REQUIREMENTS

01 00 00.00 09 GENERAL CONTRACT REQUIREMENTS

01 22 00.00 09 MEASUREMENT AND PAYMENT

01 33 00 SUBMITTAL PROCEDURES

01 35 26 GOVERNMENTAL SAFETY REQUIREMENTS

01 42 00 SOURCES FOR REFERENCE PUBLICATIONS

01 45 00.00 09 QUALITY CONTROL

01 45 00.15 09 RESIDENT MANAGEMENT SYSTEM CONTRACTOR MODE (RMS CM)

01 57 20.00 09 ENVIRONMENTAL PROTECTION

01 57 23.00 09 STORM WATER POLLUTION PREVENTION PLAN

DIVISION 31 - EARTHWORK

31 11 00.00 09 CLEARING AND GRUBBING FOR BANK STABILIZATION

31 23 03.00 09 EXCAVATION AND BACKFILL

DIVISION 32 - EXTERIOR IMPROVEMENTS

32 92 04.00 09 EROSION CONTROL

DIVISION 35 - WATERWAY AND MARINE CONSTRUCTION

35 31 19.00 09 STONE - BANK STABILIZATION

-- End of Project Table of Contents --

PROJECT TABLE OF CONTENTS Page 1 Revised by Amendment 0004

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 57 23.00 09

STORM WATER POLLUTION PREVENTION PLAN

PART 1 GENERAL

1.1 REFERENCES

1.2 SYSTEM DESCRIPTION

1.2.1 Process for Viewing Current Mississippi Small Construction

Storm Water General Permit

1.2.2 Small Construction Notice of Intent (SCNOI)

1.2.3 Permit Notifications

1.2.4 Notice of Termination (NOT) of Coverage

1.2.5 Inspection Suspension Form

1.3 SUBMITTALS

1.4 SITE DESCRIPTION

1.4.1 Nature of Construction Activity

1.4.2 Major Activities Which Disturb Soils

1.4.3 Estimated Areas Affected

1.4.4 Runoff Coefficient

1.4.5 Contract Drawings and Specifications

1.4.6 Waters Affected

1.4.7 Non-Storm Water Discharges

1.4.7.1 Allowable Non-Storm Water Discharges

1.4.7.2 Prohibited Non-Storm Water Discharges

1.5 CONTROLS

1.5.1 Erosion and Sediment Controls

1.5.1.1 Stabilization Practices

1.5.1.2 Structural Practices

1.5.2 Storm Water Management

1.5.2.1 Management Practices

1.5.2.2 Methods

1.5.3 Other Controls

1.5.3.1 Waste Disposal

1.5.3.2 Off-site Vehicle Tracking

1.5.3.3 Compliance with Regulations

PART 2 PRODUCTS

2.1 FILTER FABRIC FOR SILT SCREEN FENCE

2.2 ACCEPTANCE REQUIREMENTS

2.2.1 General

2.2.2 Mill Certificates or Affidavits

2.2.3 Testing

2.3 IDENTIFICATION, STORAGE AND HANDLING

PART 3 EXECUTION

3.1 MAINTENANCE

3.2 INSPECTIONS

SECTION 01 57 23.00 09 Page 1

3.2.1 General

3.2.2 General

3.2.3 Field Inspections

3.2.4 Inspection Reports

3.2.5 Inspection and Certification Form for Small Construction

Erosion and Sediment Controls

3.2.6 Revisions to the SWPP Plan

3.3 PERMIT TERMINATION

-- End of Section Table of Contents --

SECTION 01 57 23.00 09 Page 2

SECTION 01 57 23.00 09

STORM WATER POLLUTION PREVENTION PLAN

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 in the text by basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM D 4354 (1999; R 2009) Sampling of Geosynthetics for Testing

ASTM D 4439 (2004) Geosynthetics

ASTM D 4491 (1999a; R 2009) Water Permeability of Geotextiles by Permittivity

ASTM D 4533 (2004; R 2009) Trapezoid Tearing Strength of Geotextiles

ASTM D 4632 (2008) Grab Breaking Load and Elongation of Geotextiles

ASTM D 4751 (2004) Determining Apparent Opening Size of a Geotextile

ASTM D 4759 (2002; R 2007) Determining the Specification Conformance of Geosynthetics

ASTM D 4873 (2002; R 2009) Identification, Storage, and Handling of Geosynthetic Rolls and Samples

1.2 SYSTEM DESCRIPTION

All construction activities conducted by the Contractor shall be performed in full compliance with the latest version of the State of Mississippi Large Small Construction Storm Water General Permit for storm water discharges from construction activities. Pursuant to the State of Mississippi Large Small Construction Storm Water General Permit for storm water discharges from construction activities, the requirements contained herein shall constitute the Storm Water Pollution Prevention Plan, hereafter called the SWPP Plan for this contract. The Contractor shall implement and diligently pursue all measures required herein. The purpose of the SWPP Plan is to control storm water volume and velocity within the site to minimize the soil erosion resulting from construction activities under this contract to prevent sediment from accumulating in existing drainage ditches,leaving the contract rights-of-way,or entering the streams at each site as shown on the drawings and to minimize the downstream channel and stream bank erosion.. Requirements under this section of the specifications are supplemental to and shall become part of

SECTION 01 57 23.00 09 Page 3 the overall Environmental Protection Plan required by Section

01 57 20.00 09 ENVIRONMENTAL PROTECTION.

1.2.1 Process for Viewing Current Mississippi Large Small Construction Storm Water General Permit

The latest permit and applicable forms are available on the Internet at http://www.deq.state.ms.us/MDEQ.nsf/page/epd_epdgeneral?OpenDocument.

Prior to making an offer, offerors should view the referenced website for the latest permit requirements and applicable forms. No separate payment will be made for complying with the requirements of this Section, or for complying with requirements of the current Mississippi Large Construction Small Construction Storm Water General Permit, or for obtaining and complying with any other permits required for this contract.

1.2.2 Small Construction Notice of Intent (SCNOI)

A Small Construction Notice of Intent (SCNOI) is not required to be filed with the permitting agency unless requested by MDEQ. The Contractor shall complete and certify a separate SCNOI form for each construction site under this contract that has one acre or more disturbed. The SCNOI forms, along with the Contractor's Storm Water Pollution Prevention Plan, shall be kept on each site, or locally available at the Contractor's project office, and available for review for the duration of the contract. The Contractor shall provide six copies of the certified SCNOI for each site to the Contracting Officer at least 7 days prior to the Preconstruction Conference. See Section 01 00 00.00 09 GENERAL CONTRACT REQUIREMENTS, paragraph PRECONSTRUCTION CONFERENCE.

1.2.3 Permit Notifications

The Contractor shall notify the permitting agency by certifying and submitting a Prime Contractor Certification Form and Notice of Termination as required by the Large Small Construction Storm Water General Permit for storm water discharges for this project as stated below. The Contractor shall maintain copies of all correspondence with the permitting agency with the SWPP Plan for the duration of this contract.

1.2.2 Prime Contractor Certification Form

A Large Construction Notice of Intent (LCNOI) and the SWPPP required by the State of Mississippi will be filed by the Government with the permitting agency prior to the award of this contract. The Contractor shall complete the Prime Contractor Certification form indicating that he takes responsibility for permit compliance and meeting permit conditions prior to the commencement of construction activities. The Contractor shall certify and submit the Prime Contractor Certification form to the permitting agency at least 48 hours prior to beginning work. The Contractor shall furnish two (2) copies of the submitted documentation to the Contracting Officer.

1.2.4 Notice of Termination (NOT) of Coverage

Upon successful completion of all permanent erosion and sediment controls for this project, and at the direction of the Contracting Officer, the Contractor shall submit a Notice of Termination (NOT) of Coverage to the Mississippi Department of Environmental Quality stating that all permanent erosion and sediment controls have been completed. The Contractor shall also provide three copies of the submitted documentation to the

SECTION 01 57 23.00 09 Page 4

Contracting Officer and one copy to U.S. Army Corps of Engineers, Vicksburg District, 4155 Clay Street, Vicksburg, Mississippi 39183-3435, Attn: Water Quality Section.

1.2.5 Inspection Suspension Form

The Contractor may request the suspension of weekly inspection and monthly reporting requirements on portions of the project area if the Contractor certifies that: (1) land disturbing activities have temporarily ceased;

(2) no further land disturbing activities are planned for a period of at least 6 months; (3) the site is stable with no active erosion; and (4) vegetative cover has been established.

The Contractor shall submit to the permitting agency a completed Inspection Suspension Form along with color photographs representative of the site as stipulated in the Large Small Construction Storm Water General Permit. The Contractor shall notify MDEQ once construction activities are resumed and the weekly inspections shall commence immediately and as required by the permit. The Contractor shall still be responsible for all permit conditions during any suspension period.

1.3 SUBMITTALS

Government approval is required for all 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. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-07 Certificates

Filter Fabric

The Contractor shall submit a certificate of compliance attesting that the filter fabric meets the specified requirements.

1.4 SITE DESCRIPTION

1.4.1 Nature of Construction Activity

The work consists of furnishing all plant, labor, materials, and equipment, and constructing four (4) grade control structures in Tate County, Mississippi. Principle features of work for the grade control structures include clearing and grubbing; excavation, backfill, embankment, control of water; storm water pollution prevention; and environmental protection.

1.4.2 Major Activities Which Disturb Soils

The major activities which will disturb the soil at the site include clearing and grubbing, excavation, embankment construction,grading and placement of stone .

1.4.3 Estimated Areas Affected

The total area of the construction site is approximately 11.13 acres. The area of soil that will be disturbed is approximately 4.95 acres.

The approximate area of each construction site and the area of soil that

SECTION 01 57 23.00 09 Page 5 will be disturbed within each construction site is:

Site Construction Area (Acres) Disturbed Area (Acres)

Site 1 1.71 .98 Site 2 1.35 .91 Site 3 1.88 1.10 Site 4 1.59 .43

1.4.4 Runoff Coefficient

The estimated runoff coefficient at the site will be .35 after construction activities are completed.

1.4.5 Contract Drawings and Specifications

The following features are shown on or can be determined from the contract drawings and specifications:

a. The approximate slopes after the major construction activities.

b. Areas of soil disturbance.

c. The location where stabilization practices are required.

d. Surface waters.

e. Locations where storm water is discharged into a surface water.

f. Typical best management practices which are anticipated to be used in the control of sediment and erosion control.

1.4.6 Waters Affected

The surface water which may be affected by this contract is James Wolf Creek . .

1.4.7 Non-Storm Water Discharges

1.4.7.1 Allowable Non-Storm Water Discharges

a. Discharges from actual fire-fighting activities.

b. Fire hydrant flushing.

c. Water used to control dust.

d. Potable water sources including uncontaminated water line flushing.

e. Routine external building wash down that does not use detergents.

f. Pavement wash waters where spills or leaks of toxic or hazardous materials have not occurred (unless all spilled material has been removed) and where detergents are not used.

g. Uncontaminated air conditioning or compressor condensation.

h. Uncontaminated ground water or spring water.

SECTION 01 57 23.00 09 Page 6

i. Foundation or footing drains where flows are not contaminated with process materials such as solvents.

j. Landscape irrigation.

k. Water used to wash vehicles, wheel wash water and other wash waters where detergents are not used.

1.4.7.2 Prohibited Non-Storm Water Discharges

a. Wastewater from washout of concrete (unless managed by appropriate control).

b. Wastewater from washout and cleanout of stucco, paint, form release oils, curing compounds and other construction materials

c. Fuels, oils, or other pollutants used in vehicle and equipment operation and maintenance.

d. Soaps or solvents used in vehicle and equipment washing.

e. Wastewater from sanitary facilities, including portable toilets.

f. Dewatering activities, including discharges from dewatering of trenches and excavations unless managed by BMP's.

1.5 CONTROLS

The controls and measures required by the Contractor are described below.

1.5.1 Erosion and Sediment Controls

The contractor is responsible for the management of storm water.

The Contractor shall maintain a log of the dates when major grading activities occur, (e.g. clearing and grubbing, excavation, embankment construction, and grading); when construction activities temporarily or permanently cease on a portion of the site; and when stabilization practices are initiated.

1.5.1.1 Stabilization Practices

a. General - The stabilization practices required to be implemented shall include , permanent seeding or sprigging, mulching, sod stabilization, erosion control matting, protection of trees, preservation of mature vegetation, etc. However, the Contractor may, at his option and at no additional cost to the Government, provide a fall and winter temporary erosion control measure by seeding with rye grass or other approved winter grasses. The Contractor shall maintain a log of the dates when the major grading activities occur, (e.g. );

when construction activities permanently cease on a portion of the site; and when stabilization practices are initiated, and shall attach this log to the SWPP Plan. Vegetative stabilization measures must be initiated immediately whenever any land disturbing activities have temporarily or permanently ceased on any portion of the site and will not resume for a period of fourteen (14) calendar days or more.

b. Interim Stabilization Practices - The interim stabilization

SECTION 01 57 23.00 09 Page 7 practices required are described below.

(1) Only trees that are within the indicated limits to construct the permanent work shall be removed.

(2) Existing vegetative cover shall be preserved to the extent possible to reduce erosion.

c. Permanent Stabilization Practices - The permanent stabilization practices to be implemented are described below.

(1) Permanent seeding (erosion control) shall be performed within 7 days after the final grading is completed in accordance with Section 32 92 04.00 09 EROSION CONTROL.

(2) Mulch shall be placed on areas of erosion control treatment as specified.

1.5.1.2 Structural Practices

a. General - Structural practices shall be implemented to divert flows from exposed soils, temporarily store flows, or otherwise control runoff in order to prevent sediments from accumulating in existing drainage ditches, leaving the contract rights-of-way, or entering the Yazoo River. The Contractor shall implement the required structural practices and the necessary structural practices as may be required to control runoff for his construction methods and procedures. The installation of these measures may be subject to Section 404 of the Clean Water Act. The Contractor shall be responsible for obtaining the Section 404 permit if required for any structural practice he proposes to implement. Structural practices shall be implemented at the start of the construction process or at the start of each phase of construction to minimize erosion and sediment runoff. Structural practices shall be removed after they have served their intended purpose and after their removal has been approved by the Contracting Officer.

b. Devices - Structural practices may include but shall not be limited to the following devices (typical details are shown on the drawings):

(1) Silt fences

(i) General

Filter fabric shall meet the requirements of PART 2 PRODUCTS, paragraph FILTER FABRIC.

Filter fabric shall contain ultraviolet ray inhibitors and stabilizers to provide a minimum of six months of expected usable construction life at a temperature range of 0 degrees F to 120 degrees F.

If wooden stakes are utilized for silt fence construction, they shall have a minimum diameter of 2 inches when oak is used and 4 inches when pine is used. Wooden stakes shall have a minimum length of 5 feet.

If steel posts (standard "U" or "T" section) are utilized for silt

SECTION 01 57 23.00 09 Page 8 fence construction, they shall have a minimum weight of 1.33 pounds per linear foot and a minimum length of 5 feet.

Wire fence reinforcement for silt fences using standard strength filter fabric shall be a minimum of 14 gauge and shall have a maximum mesh spacing of 6 inches.

(ii) Installation

The height of a silt fence shall be a minimum of 16 inches above the ground surface and shall not exceed 34 inches above the ground surface.

The filter fabric shall be purchased in a continuous roll cut to the length of the barrier to avoid the use of joints. When joints are unavoidable, filter fabric shall be spliced together only at a support post with a minimum 6 inch lap and securely sealed.

A trench shall be excavated approximately 4 inches wide and 4 inches deep on the upslope side of the proposed location of the measure.

When wire support is used, standard-strength filter fabric may be used. Posts for this type of installation shall be placed a maximum of 10 feet apart. The wire mesh fence shall be fastened securely to the upslope side of the posts using heavy duty wire staples at least 1 inch long, tie wires or hog rings. The wire shall extend into the trench a minimum of 2 inches and shall not extend more than 34 inches above the ground surface. The standard strength fabric shall be stapled or wired to the wire fence, and 8 inches of the fabric shall be extended into the trench. The fabric shall not be stapled to existing trees.

When wire support is not used, extra-strength filter fabric shall be used. Posts for this type of fabric shall be placed a maximum of 6 feet apart. The filter fabric shall be fastened securely to the upslope side of the posts using 1 inch long (minimum) heavy-duty wire staples or tie wires and 8 inches of the fabric shall be extended into the trench. The fabric shall not be stapled to existing trees.

The 4 inch by 4 inch trench shall be backfilled and the soil compacted over the filter fabric.

Silt fences shall be removed upon approval by the Contracting Officer.

(2) Straw Bales.

Bales shall be placed in a single row, lengthwise on the contour, with ends of adjacent bales tightly abutting one another. Bale rows used to retain sediment shall be turned uphill at each end of each row.

All bales shall be either wire-bound or string-tied. Straw bales shall be installed so that bindings are oriented around the sides rather than along the tops and bottoms of the bales in order to prevent deterioration of the bindings.

SECTION 01 57 23.00 09 Page 9

The barrier shall be entrenched and backfilled. A trench shall be excavated the width of a bale and the length of the proposed barrier to a minimum depth of 4 inches. After the bales are staked and chinked (gaps filled by wedging), the excavated soil shall be backfilled against the barrier. Backfill soil shall conform to the ground level on the downhill side and shall be built up to 4 inches against the uphill side of the barrier.

Each bale shall be securely anchored by at least two stakes (minimum dimensions 2 inches x 2 inches x 36 inches) or standard "T" or "U" steel posts (minimum weight of 1.33 pounds per linear foot) driven through the bale. The first stake or steel post in each bale shall be driven toward the previously laid bale to force the bales together. Stakes or steel pickets shall be driven a minimum 18 inches deep into the ground to securely anchor the bales.

The gaps between bales shall be chinked (filled by wedging) with straw to prevent water from escaping between the bales. Loose straw may be scattered over the area immediately uphill from a straw bale barrier to increase barrier efficiency.

Straw bale barriers shall be removed upon approval by the Contracting Officer.

(3) Temporary Diversion Dikes

Temporary diversion dikes shall have a maximum channel slope of 2 percent and shall be adequately compacted to prevent failure. The minimum height measured from the top of the dike to the bottom of the channel shall be 18 inches. The minimum base width shall be 6 feet and the minimum top width shall be 2 feet. Temporary diversion dikes shall be located to minimize damages caused by construction operations and traffic.

(4) Sedimentation Basins

General: For drainage areas that serve an area of 10 acres or greater, a temporary sedimentation basin will be provided until final stabilization is achieved. The sediment basin should provide at least 3,600 cubic feet of storage per acre drained.

The contractor shall submit his plans for the location, construction, operation, and maintenance of the temporary sedimentation basin along with the necessary calculations for the outfall structure for review at the time of the pre-construction meeting.

Installation: The sedimentation basin will be installed prior to major site grading. The outlet structure for the sediment basin shall withdraw water from the surface and will be designed for the 2-year, 24 hour storm event.

Due to the linear nature of the project, sediment basins will not be used due to the narrow ROW and the lack of a common drainage area serving 10 or more acres.

(5) Rock Riffle Structure

SECTION 01 57 23.00 09 Page 10

General: A small temporary dam constructed across a swale or ditch to slow the velocity of water to reduce erosion and off-site transport

Installation: Rock riffle structures should be constructed of stones. Silt fence material is acceptable for use as rock riffle structures. The rock riffle structure should be no higher than 2 feet with the center of the check dam a minimum of 6 inches lower than the outer edges of the check dam. The complete width of the swale or the drainage ditch should be covered with the rock riffle structure such that run-off will not flow around the edges of the rock riffle structure. Subsequent rock riffle structures should be placed so that the center of the next rock riffle structure is the same elevation as the bottom of the previous structure immediately upstream.

(6) Floating Turbidity Barrier

Floating turbidity barriers will not be used with the project because no construction work is to occur within a waterbody.

c. Device Applicability

(1) Straw bales, silt fences, earth dikes, and drainage swales for diversion of runoff upstream from work areas.

(2) Straw bales, silt fences and earth dikes for retention of flow in drains.

(3) Stone outlet protection at culverts.

(4) Sediment containment by providing straw bales or silt fences along the toe of fill and cut slopes.

(5) Earth dikes for temporary sediment basins in major drainage channels downstream from work areas.

Structural practices shall be properly placed to effectively retain sediment immediately after completing each phase of work (e.g. clearing and grubbing, excavation, embankment construction, and grading) in each independent runoff area (e.g. after clearing and grubbing in an area between a ridge and drain). Structural practices shall be placed, and as work progresses, removed/replaced/relocated as needed for work to progress in each runoff area. Structural practices, to the extent necessary to prevent sediment from accumulating in existing drainage ditches, leaving the contract rights-of-way, or entering the Yazoo River, shall be implemented as follows:

(1) Along the downhill perimeter edge of disturbed areas.

(2) Along the top of the slope or top bank of drainage ditches, channels, swales, etc. that traverse disturbed areas.

(3) Along the toe of cut slopes and fill slopes of the construction areas.

(4) Perpendicular to the flow in the bottom of existing drainage ditches, channels, swales, etc. that traverse disturbed areas or

SECTION 01 57 23.00 09 Page 11 carry runoff from disturbed areas. Rows of straw bales or silt fences shall be spaced a maximum of 100 feet apart in such existing drains that are within the limits of the work.

(5) Perpendicular to the flow in the bottom of new drainage ditches, channels, and swales. Rows of straw bales or silt fences shall be spaced a maximum of 200 feet apart in drains with slopes equal to or less than 5 percent and 100 feet apart in drains with slopes steeper than 5 percent.

(6) At the entrance to culverts that receive runoff from disturbed areas.

1.5.2 Storm Water Management

1.5.2.1 Management Practices

The storm water management practices that shall be permanently installed under this contract are as follows:

a. Erosion control.

b. Stone protection.

c. Quarry-run stone paving.

1.5.2.2 Methods

a. Erosion control shall be in accordance with Section 32 92 04.00 09

EROSION CONTROL.

b. Stone protection shall be in accordance with Section 35 31 19.00 09

STONE - BANK STABILIZATION.

1.5.3 Other Controls

1.5.3.1 Waste Disposal

No solid materials, including building materials, shall be discharged to waters of the United States, except as authorized by a Section 404 permit. Other requirements are included in Section 01 57 20.00 09

ENVIRONMENTAL PROTECTION.

1.5.3.2 Off-site Vehicle Tracking

Off-site vehicle tracking of sediments shall be minimized.

1.5.3.3 Compliance with Regulations

The Contractor shall ensure and demonstrate compliance with applicable State or local waste disposal, sanitary sewer or septic system regulations.

PART 2 PRODUCTS

2.1 FILTER FABRIC FOR SILT SCREEN FENCE

The geotextile, as defined by ASTM D 4439 , shall consist of polymeric filaments which are formed into a stable network such that filaments retain their relative positions. The filament shall consist of a long-chain synthetic polymer composed of at least 85 percent by weight of ester, propylene, or amide, and shall contain stabilizers and/or

SECTION 01 57 23.00 09 Page 12 inhibitors added to the base plastic to make the filaments resistance to deterioration due to ultraviolet and heat exposure. The geotextile shall conform to the physical property requirements in paragraph ACCEPTANCE REQUIREMENTS, subparagraph TESTING.

2.2 ACCEPTANCE REQUIREMENTS

2.2.1 General

All brands of geotextile to be used will be accepted on the following basis.

2.2.2 Mill Certificates or Affidavits

The mill certificate or affidavit shall attest that the filter fabric and factory seams meet chemical, physical, and manufacturing requirements specified. The mill certificate of affidavit shall specify the actual Minimum Average Roll Values and shall identify the fabric supplied by roll identification numbers.

2.2.3 Testing

If requested by the Contracting Officer, Government personnel shall collect filter fabric samples in accordance with ASTM D 4354 for testing to determine compliance with any or all of the requirements specified pursuant to ASTM D 4759 and the following table:

EXTRA STRENGTH FILTER FABRIC FOR SILT SCREEN FENCE

PHYSICAL PROPERTY TEST PROCEDURE REQUIREMENTS

Grab Tensile Strength ASTM D 4632 100 lbs. min.

Elongation (%) ASTM D 4632 30 % max.

Trapezoid Tear ASTM D 4533 55 lbs. min.

Permittivity ASTM D 4491 0.2 sec-1 min.

AOS (U.S. Std Sieve) ASTM D 4751 20-100

NOTE: Standard strength filter fabric for silt screen fence shall meet the same minimum requirements for AOS and Permittivity as the extra strength filter fabric, but may have lower strengths for the remaining properties listed in the table.

2.3 IDENTIFICATION, STORAGE AND HANDLING

Filter fabric shall be identified, stored and handled in accordance with

ASTM D 4873 .

PART 3 EXECUTION

3.1 MAINTENANCE

The Contractor shall maintain the temporary and permanent vegetation, erosion and sediment control measures, and other protective measures in good and effective operating condition by performing routine inspections to determine condition and effectiveness, by restoration of destroyed

SECTION 01 57 23.00 09 Page 13 vegetative cover, and by repair of erosion and sediment control measures and other protective measures. The following procedures shall be followed to maintain the protective measures identified in the SWPP Plan.

a. Silt Fences

Silt fences shall be inspected in accordance with paragraph INSPECTIONS. Any required repairs shall be made promptly. Close attention shall be paid to the repair of damaged silt fence resulting from end runs and undercutting. Should the fabric on a silt fence decompose or become ineffective, and the barrier is still necessary, the fabric shall be replaced promptly. Sediment deposits shall be removed when deposits reach one-third of the height of the barrier or a maximum height of 9 inches. When a silt fence is no longer required, it shall be removed. The immediate area occupied by the fence and any sediment deposits shall be shaped to an acceptable grade. The areas disturbed by this shaping shall receive erosion control in accordance with Section 32 92 04.00 09 EROSION CONTROL.

b. Straw Bales

Straw bale barriers shall be inspected in accordance with paragraph INSPECTIONS. Close attention shall be paid to the repair of damaged bales, end runs and undercutting beneath bales. Necessary repairs to barriers or replacement of bales shall be accomplished promptly.

Sediment deposits shall be removed when deposits reach one-half of the height of the barrier. When a straw bale barrier is no longer required, it shall be removed. The immediate area occupied by the bales and any sediment deposits shall be shaped to an acceptable grade. The areas disturbed by this shaping shall receive erosion control in accordance with Section 32 92 04.00 09 EROSION CONTROL.

3.2 INSPECTIONS

3.2.1 General

Disturbed areas of the construction site, areas used for storage of materials that are exposed to precipitation that have not been finally stabilized, stabilization practices, structural practices, other controls, and areas where vehicles exit the site shall all be inspected by the Contractor in accordance with the requirements of the Mississippi Small Construction General Permit for storm water discharges from construction activities. Where sites have been finally stabilized, such inspection shall be conducted at least once every month.

3.2.2 General

Disturbed areas of the construction site, areas used for storage of materials that are exposed to precipitation that have not been finally stabilized, stabilization practices, structural practices, other controls, and areas where vehicles exit the site shall be inspected by the Contractor at least weekly for a minimum of four inspections per each month; and as often as necessary to ensure that appropriate erosion and sediment controls have been properly constructed and maintained, and to determine if additional or alternative control measures are required. The Contractor shall perform a "walk through" inspection of the construction site before anticipated storm events. Where sites have been finally stabilized, such inspection shall be conducted at least once every month.

SECTION 01 57 23.00 09 Page 14

3.2.3 Field Inspections

Disturbed areas and areas used for material storage that are exposed to precipitation shall be inspected for evidence of, or the potential for, pollutants entering the drainage system. Erosion and sediment control measures identified in the SWPP Plan shall be observed to ensure that they are operating correctly. Discharge locations or points shall be inspected to ascertain whether storm water pollution prevention measures are effective in preventing significant impacts to receiving waters.

Locations where vehicles exit the site shall be inspected for evidence of offsite sediment tracking.

3.2.4 Inspection Reports

For each inspection conducted, the Contractor shall complete a Inspection and Certification Form for Erosion and Sediment Controls. The report shall be signed by the Contractor. The report shall be furnished to the Contracting Officer within 24 hours of the inspection as a part of the Contractor's daily CQC REPORT. A complete log of the inspections shall be maintained on the job site and become a part of the SWPP Plan.

3.2.5 Inspection and Certification Form for Small Construction Erosion and Sediment Controls

On the first working day of each month the Contractor shall complete, sign and attach to the SWPPP a Inspection and Certification Form for Small Construction Erosion and Sediment Controls summarizing the previous month's inspections. On the first working day of each month, the Contractor shall also furnish one copy of the form to the Contracting Officer as part of the Contractor's daily CQC Report.

3.2.6 Revisions to the SWPP Plan

Based on the results of the inspection and immediately after the inspection, the Contractor shall provide to the Contracting Officer any recommended changes to the SWPP Plan. The Contracting Officer will approve or disapprove the proposed changes within seven (7) calendar days after receipt. Changes to the SWPP Plan shall be implemented within seven

(7) calendar days following approval.

3.3 PERMIT TERMINATION

Upon successful completion of all permanent erosion and sediment controls, the Contractor shall record the date of completion of all permanent erosion and sediment controls on the Final Inspection Report. The Contractor shall submit written notification certifying that all permanent erosion and sediment controls have been completed. Final payment will not be made until this written notification has been accepted by the Contracting Officer. The written notification shall include copies of all inspection forms completed as required by this section. In addition, if a SCNOI was submitted to MDEQ, the Contractor shall submit a copy of this notification (including attachments) to MDEQ as required in MDEQ's Storm Water Small Construction General Permit.

-- End of Section --

SECTION 01 57 23.00 09 Page 15

KO CONTRACTING DIVISION, 4155 CLAY STREET

VICKSBURG, MS 39183-3435

UNITED STATES

FRETESHIA JOHNSON, EMAIL: FRETESHIA.L.JOHNSON@USACE.ARMY.MIL TELEPHONE: 601-631-5219 AdminBy:

SCD: PAS: