Amendment_2.pdf

(x)

12SPEC18B0014

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 telegram 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 telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

x

NRCS-LA-127217

LAFAYETTE LA 70506

646 CAJUNDOME BLVD SUITE 180

USDA-NRCS-LOUISIANA STATE OFFICE

WASHINGTON DC 20250

NRCS-HQ-12SPEC

ROOM 6801-S

1400 INDEPENDENCE AVENUE, SW

USDA-NRCS SPECIALIZED CONTRACTING T

NRCS-HQ-12SPEC

07/13/20180002

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

06/12/2018

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 date, 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.)

The purpose of this amendment is provide the Site Showing Sign In Sheet (attached), provide responses to Questions and Answers (Q&A's) (attached) and provide changes in the Bid

Schedule, and Construction Specifications for Traffic Control, Excavation, Earthfill and

Rockfill.

The following Construction Specifications are hereby amended:

1. Remove Construction Specification 9 - Traffic Control pages 9-1 through 9-3 and replace with Construction Specification 9 - Pages 9-1 through 9-3 dated July 2018 - Amendment 2.

This specification was amended to make this item subsidiary to Bid Item 9, Staging/Price

Lake Road.

Continued ...

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)

MICHELLE BELKOT

STANDARD FORM 30 (REV. 10-83)

Prescribed by GSA

FAR (48 CFR) 53.243

NSN 7540-01-152-8070

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 .

ITEM NO. SUPPLIES/SERVICES QUANTITY UNIT UNIT PRICE AMOUNT

NAME OF OFFEROR OR CONTRACTOR

2 3

CONTINUATION SHEET

REFERENCE NO. OF DOCUMENT BEING CONTINUED PAGE OF

(A) (B) (C) (D) (E) (F)

12SPEC18B0014/0002

2. Remove Construction Specification 21 -

Excavation Pages 21-1 through 21-9 and replace with Construction Specification 21 - Excavation

Pages 21-1 through 21-9 dated July 2018 -

Amendment 2. This specification was amended to remove all subsidiary items for Staging/Price

Lake Road from Excavation for Marsh Creation Fill and to make Subsidiary Item, Excavation, Staging

Area and Price Lake Road subsidiary to Bid Item

9, Staging/Price Lake Road.

3. Remove Construction Specification 23 -

Earthfill, Pages 23-1 through 23-11 and replace with Construction Specification 23 - Earthfill, Pages 23-1 through 23-11 dated July 2018 -

Amendment 2. This specification was amended to clarify when the 10 day waiting period for the containment dikes commences, establishes additional criteria for the survey submittal and to change Subsidiary Item, Earthfill, Staging

Area and Price Lake Road to Bid Item 9, and update the payment provisions for Bid Item 9.

4. Remove Construction Specification 25 -

Rockfill, Pages 25-1 through 25-5 and replace with Construction Specification 25 - Rockfill, Pages 25-1 through 25-5 dated July 2018 -

Amendment 2. This specification was amended to remove all subsidiary items for Excavation for

Marsh Creation Fill and to make Subsidiary Item, Rockfill, Staging Area and Price Lake Road subsidiary to Bid Item 9, Staging/Price Lake Road

5. Replace the Bid Schedule with the Bid

Schedule labeled Amendment 2. The Bid Schedule was amended to correct the quantities for Bid

Item 6, Lighted Buoys and Bid Item 8, Structure

Removal and add Bid Item 9, Staging/Price Lake

Road.

In addition, the following FAR clauses are hereby corrected as follows:

1. FAR 52.214-15 - Period for Acceptance of Bids is hereby corrected from 120 days to 90 days.

All other terms and conditions of the solicitation remain unchanged and in full force and effect.

Continued ...

NSN 7540-01-152-8067 OPTIONAL FORM 336 (4-86)

Sponsored by GSA

FAR (48 CFR) 53.110

ITEM NO. SUPPLIES/SERVICES QUANTITY UNIT UNIT PRICE AMOUNT

NAME OF OFFEROR OR CONTRACTOR

3 3

CONTINUATION SHEET

REFERENCE NO. OF DOCUMENT BEING CONTINUED PAGE OF

(A) (B) (C) (D) (E) (F)

12SPEC18B0014/0002

Period of Performance: 06/12/2018 to 09/30/2019

NSN 7540-01-152-8067 OPTIONAL FORM 336 (4-86)

Sponsored by GSA

FAR (48 CFR) 53.110

12SPEC18B0015

ME-20 SOUTH GRAND CHENIER

MARSH CREATION PROJECT

SITE SHOWING QUESTIONS AND ANSWERS

1. Does the contractor need to clear numerous acres as part of the clearing operations?

A = No just trees/small brush within the dike footprint.

2. Can the contractor continue to work in other areas if hydraulic leak occurs on a piece of equipment or does all work stop while the repair is being made?

A = Yes work can continue in other area; however, the contractor will need to take immediate action to resolve the leak and clean up the site as quickly as possible.

3. Have any recent sightings of manatees occurred in the area of the project site?

A = No, however, the contractor shall remain on alert for such sightings during the performance of the work in accordance with the Special Provisions (SP7‐8)

4. Which of the surveys (contractors or Government) will take precedence when confirming final quantities for payment purposes?

A= The contractor’s surveys will be utilized for the pre‐construction survey and interim surveys.

The interim surveys will be utilized for progress payments; however, the final Government survey will be utilized for final payment of all quantities. (See Construction Specification 7).

5. Can contractors use multi‐beam in conducting their hydrographic surveys?

A = It is not required; however, the contractor can utilize multi‐beam if they so choose.

6. Will VRS be allowed?

A = No see Construction Specification 7, Item 9.1.3.

7. Do you know the depth of water coming in from the Gulf?

A = No the contractor will need to take soundings to determine this.

8. Why is the borrow area broken down into 200’ compartments and can an alternate compartment size be requested?

A = See Construction Specification 21 – Excavation, Section 10.2.14, “The contractor may submit an alternate plan to the COR for consideration relative to meeting the intent of this requirement.

Any alternate plan must be approved by the CO and COR before the Contractor may deviate from the requirements of this section.”

9. When will the 10‐day waiting period start – when the dike is completed or on the survey data?

A = The 10‐day waiting period will commence upon the date of when the survey was taken of the entire completed containment dike to the required elevation.

10. Can the contractor request to work longer than 12 hours per day on the containment dikes or are they limited to the 12 hours per day, 7 days a week?

A = The contractor can request a deviation from this requirement and the Government will consider their request.

11. Can equipment be placed within the footprint of the containment dikes when completing the clearing operation?

A = No

12. Can the geotechnical information be obtained?

A = Yes, contractors can contact the Contracting Officer in order to schedule an appointment to obtain the information (see FAR 52.236.‐4 – Physical Data)

13. If the contractor elects to construct a staging area on Price Lake Road can it be left when construction has been completed?

A = Yes, see Construction Specification 23 – Earthfill, Item 10.3.5

14. The Bid Sheet has 69 lighted buoys, however, Sheet 24 of the plans show only 32 lighted buoys.

Can the Owner please confirm the amount of lighted buoys required to be placed and the location of each one?

A = There are 32 lighted buoys. The location for each buoy is as shown by the coordinates on Sheet 24.

15. According to Specification 10.2.11 – Pipe required on site before commencing excavation in the Gulf of Mexico: “Before the excavation operation for this item can commence, the contractor shall have on site the required length of discharge pipe to reach from the furthest point in the borrow area to the furthest point in the marsh creation placement area.” Would the owner please consider removing this requirement?

A = this requirement will not be changed

16. According to Specification 10.2.14 – Borrow area management: “The entire compartment, excluding areas along the perimeter necessary for side slopes or buffer zones, shall be excavated to elevation ‐

38.5 feet in each of the 200‐foot wide compartments.” Further: “The contractor may submit an alternate plan to the COR for consideration relative to meeting the intent of this requirement.” Will the owner consider allowing the contractors to choose their own compartment width so as to create the best productions possible and therefore reduce the cost of the bids?

A = See response to Question 8.

17. Sheet 33 and 34 of the plans provide Borrow Area Soil Logs with a note stating: “additional information from geotechnical investigations may be made available upon request.” We are requesting complete, detailed boring logs for the borrow area, similar to what was provided for the marsh creation areas, so the dredging contractors will be able to determine how the material will pump. Please provide all known liquid limits, plastic limits and blow counts.

A = contractors can contact the Contracting Officer in order to schedule an appointment to obtain the information (see FAR 52.236.‐4 – Physical Data)

18. Construction Specification 21 entitled “Excavation” appears to only define what “rock excavation” is, and does not provide contractor with an equitable adjustment should the presence of isolated boulders or rock fragments larger than 1 cy be encountered in the excavation materials. To reduce contingencies in contractor bids, please confirm if rock is encountered in materials otherwise conforming to the definition of common excavation, it would constitute a differing site condition under Section 52.236‐2.

A – The boring logs, etc. for the project area are included in the drawings provided as part of this requirement. Further information relative to the composition of soils and their classification can be obtained by obtaining a copy of the Geotechnical Report; however, the Government makes no assertions as to the makeup of the material that may be encountered at the project site. The Contractor shall satisfy itself as to the character, quality, and quantity of surface and subsurface materials or obstacles to be encountered insofar as this information is reasonably ascertainable from an inspection of the site, including all exploratory work done by the Government, as well as from the drawings and specifications made a part of this contract. Any failure of the Contractor to take the actions described and acknowledged in this paragraph will not relieve the Contractor from responsibility for estimating properly the difficulty and cost of successfully performing the work, or for proceeding to successfully perform the work without additional expense to the Government.

19. In reference to Construction Specification 5 – Pollution Control for requirements of installing measures or performing work to control erosion and minimize production of sediments and other pollutants to water and air from construction activities, please confirm that:

a. The contractor is responsible only for hazardous materials brought to the Project site and/or generated by the contractor, and will not be responsible for any pre‐existing materials containing substances classified as hazardous, potentially hazardous, infectious, toxic or dangerous under application law, which shall be disposed of in strict compliance with all regulations as directed by the Government; and

A = The Government will not take responsibility for any hazardous materials brought to the project site and/or generated by the contractor nor take any responsibility for any failure on the contractor’s part to adhere to the requirements when working in and around pipelines, utilities and structures as identified in the construction specifications or drawings. Known pipelines and utilities are shown in the construction drawings and are based on available data. It is possible that some pipelines and/or utilities existing that have not been shown. The contractor shall be on the alert for such pipelines and utilities and shall report them immediately to the CO.

b. Any such pre‐existing materials generated within the confines of Government facilities is identified by the Government.

A = The Government will not take responsibility for any hazardous materials brought to the project site and/or generated by the contractor nor take any responsibility for any failure on the contractor’s part to adhere to the requirements when working in and around pipelines, utilities and structures as identified in the construction specifications or drawings. Known pipelines and utilities are shown in the construction drawings and are based on available data. It is possible that some pipelines and/or utilities existing that have not been shown. The contractor shall be on the alert for such pipelines and utilities and shall report them immediately to the CO.

20. Please confirm Contractor is solely responsible for damage to known utilities and will not be responsible for damage to utilities not shown on the plans and specifications or identified by Louisiana One Call utility locator service.

A = Known pipelines and utilities are shown in the construction drawings and are based on available data. It is possible that some pipelines and/or utilities existing that have not been shown.

The contractor shall be on the alert for such pipelines and utilities and shall report them immediately to the CO. The Government will not take responsibility for any unidentified pipelines or utilities not shown on the plans or obtained through LA One Call locator service nor take any responsibility for any failure on the contractor’s part to adhere to the requirements when working in and around pipelines, utilities and structures as identified in the construction specifications or drawings.

21. Page 1 of the Solicitation, the last line states: “Offers providing less than 90 calendar days for Government acceptance after the date offers are due will not be considered and will be rejected.”

Further, Section 52.214‐15 Period for Acceptance of Bids states: “In compliance with the solicitation, the bidder agrees, if this bid is accepted within 120 calendar days from the state specified in the solicitation for receipt of bids, to furnish any or all items upon which prices are bid at the price set opposite each item, delivered to the designated point(s) within the time specified in the Schedule.” Can the owner please confirm whether the period for acceptance of bids is 90 or 12 days?

A = The period of acceptance is 90 days.

21. What is the design cut/fill ratio for the marsh creation area?

A = The Cut/Fil ratio is available in the geotechnical report which can be obtained by contacting the Contracting Officer in order to schedule an appointment to obtain the information (see FAR 52.236.‐4 – Physical Data)

22. What is the designated address wherein the sealed bids will be opened?

A = USDA‐Natural Resources Conservation Service, 646 Cajundome Boulevard, Suite 180, Lafayette, LA 70506.

23. If the contractor chooses to pursue the access for equipment from the west side of the project area the contact information for the Miller Properties is as follows:

Iris Broussard (337) 652‐1355 Martin Miller (504)616‐5700

24. Is there a load limit for Price Lake Road?

A = Yes, 10,000 pounds (See Construction Specification 9 – Traffic Control). Contractors will need to mat over the water control structure area. Requests to transport over 10,000 pounds on Price Lake Road must be made to the Rockefeller Refuge Manager prior to use.

25. Does the pipe over Hog Bayou need to be buried?

A – Yes, See Construction Specification 21 – Excavation.

South Grand Chenier Marsh Creation (ME-20) Bid Schedule (Amendment #2) Schedule of Items Item No. Work Spec No. Quantity Unit Unit Price Amount

1 Mobilization/Demobilization 8 1 LS 2 Construction Surveys 7 1 LS 3 Contractor QC 94 1 LS

4 Earthfill, Containment Dikes 23 33,560 LF

5 Staff Gauges 93 40 EA 6 Lighted Buoys 93 32 EA 7 Marsh Creation Fill 23 1,503,400 CY 8 Structure Removal 3 5 EA 9 Staging/Price Lake Rd 23 1 LS

TOTAL

(210-VI-NEH, May 2001) 9-1

Construction Specification 9—Traffic Control

1. Scope The work shall consist of establishing traffic control and maintaining safe, convenient use of public roads and rights-of-way.

2. Traffic and access The contractor's operations shall cause no unnecessary inconvenience to the public. The public rights-of-way shall be maintained at all times unless interruption is authorized by proper local authority. Contractor's authorized closing or detour plans shall be provided to the engineer for approval.

Safe and adequate access shall be provided and maintained to all public protection devices and to all critical utility control locations. Facility access shall be continuous and unobstructed unless otherwise approved.

3. Storage of equipment and material in public streets Construction materials and equipment shall not be stored or parked on public streets, roads, or highways. During any material or equipment loading or unloading activities that may temporarily interfere with traffic, an acceptable detour shall be provided for the duration of the activity. Any associated expense for this activity is the responsibility of the contractor.

Excavated material, including suitable material that is intended for adjacent trench backfill or other earth backfill as specified in section 5 of this specification, shall not be stored on public streets, roads, or highways that remain in service for the public. Any waiver of this requirement must be obtained from the proper local authority and approved by the engineer. All excess and unsuitable material shall be removed from the site as soon as possible. Any spillage shall be removed from roadways before they are used by the public.

4. Street closures, detours, and barricades The contractor shall comply with the requirements of all applicable responsible units of government for closure of any street, road, or highway. The contractor shall provide the required barriers, guards, lights, signs, temporary bridges, and flaggers together with informing the public of any detours and construction hazards by the most suitable means available, such as local newspapers or radio stations. The contractor is also responsible for compliance with additional public safety requirements that may arise during construction. The contractor shall furnish, install, and, upon completion of the work, promptly remove all signs, warning devices, and other materials used in the performance of this work.

Unless otherwise specified, the contractor shall notify, in writing, the fire chief, police chief, county sheriff, state patrol, schools that operate school buses, or any other government official as may be appropriate no less than 7 days before closing, partly closing, or reopening any street, road, or highway.

Unless otherwise specified, the contractor shall furnish to the engineer a written plan showing the proposed method of signing, barricading for traffic control, and safety for street detours and closures.

NRCS – May 2018 July 2018 – Amendment 2 LA – South Grand Chenier Marsh Creation (ME-20) 9-2

All temporary detours will be maintained to ensure use of public rights-of-way is provided in a safe manner. This may include dust control, grading, and graveling as required in section 7 of this specification.

5. General and specific references All signs, signals, barricades, use of flaggers, and other traffic control and public safety devices shall conform to the general requirements set forth in the Manual of Uniform Traffic Control Devices (MUTCD) and the latest edition of Standard Highway Signs and Standard Alphabets for Highway Signs and/or OSHA Construction Industry Standards (29 CFR Part 1926), Subpart G, Signs, Signals, and Barricades unless otherwise specified in section 7 of this specification.

6. Measurement and payment For items of work for which specific lump sum prices are established in the contract, payment for the work is made at the contract lump sum price. Progress payments will be made based upon the percentage of estimated total time that traffic control will be required unless otherwise specified in section 7 of this specification. Payment will constitute full compensation for all flaggers, labor, materials, equipment, and all other items necessary and incidental to completion of the work.

Compensation for any item of work described in the contract, but not listed in the bid schedule will be included in the payment for the item of work to which it is made subsidiary. Such items and items to which they are made subsidiary are identified in section 7 of this specification.

7. Items of work and construction details

7.1 Subsidiary Item, Traffic Control, Staging Area and Price Lake Road

7.1.1 Item scope

In the event that the Contractor decides to utilize the staging area on Price Lake Road or decides to utilize Price Lake Road for equipment, then the following requirements apply. The Contractor shall be aware that the public uses Price Lake Road on a daily basis and may park along the shoulders of the road throughout the entire area east of the gate. The refuge is open to the public from March 1 to November 30 each year. The Government is not responsible for any delays caused by the public and the Contractor will not be provided additional time or money for any delays caused by the public.

7.1.2 Proper local authority

In section 2 of this specification, the COR and Rockefeller Refuge Manager must approve any interruption to public access prior to the interruption occurring.

7.1.3 Loading and unloading activities

In section 3 of this specification, all loading or unloading activities shall occur west of the gate on Price Lake Road where the public may not access. No equipment or materials shall be parked, stored, or located along Price Lake Road east of the gate. No barriers or other signage will be required west of the gate.

7.1.4 Notification

In section 4 of this specification, the Contractor shall install a warning sign at the intersection of Price Lake Road and Highway 82 notifying the public that construction equipment may be traveling through the area. Notification to other public entities will not be required. No written plan will be required, however the COR and Refuge Manager shall approve the above mentioned sign prior to installation.

LA – South Grand Chenier Marsh Creation (ME-20) 9-3

7.1.5 Weight Limitations

The Contractor will be required to mat across any culverts or water control structures prior to utilizing Price Lake Road west of the public access gate. Only equipment weighing 10,000 lbs. or less will be allowed down Price Lake Road. Any equipment weighing more than this will have to be approved by the Rockefeller Refuge Manager and COR prior to its use.

7.1.6 Payment

No separate payment will be made for this item. Payment for this item will be included in the payment for Bid Item 7, Excavation for March Creation Fill Bid Item 9, Staging/Price Lake Rd.

(210-VI-NEH, May 2001) LA – South Grand Chenier Marsh Creation (ME-20) 21-1

Construction Specification 21—Excavation

The work shall consist of the excavation required by the drawings and specifications and disposal of the excavated materials.

2. Classification Excavation is classified as common excavation, rock excavation, or unclassified excavation in accordance with the following definitions.

Common excavation is defined as the excavation of all materials that can be excavated, transported, and unloaded using heavy ripping equipment and wheel tractor-scrapers with pusher tractors or that can be excavated and dumped into place or loaded onto hauling equipment by excavators having a rated capacity of one cubic yard or larger and equipped with attachments (shovel, bucket, backhoe, dragline, or clam shell) appropriate to the material type, character, and nature of the materials.

Rock excavation is defined as the excavation of all hard, compacted, or cemented materials that require blasting or the use of ripping and excavating equipment larger than defined for common excavation. The excavation and removal of isolated boulders or rock fragments larger than 1 cubic yard encountered in materials otherwise conforming to the definition of common excavation shall be classified as rock excavation. The presence of isolated boulders or rock fragments larger than 1 cubic yard is not in itself sufficient cause to change the classification of the surrounding material.

For the purpose of these classifications, the following definitions shall apply:

Heavy ripping equipment is a rear-mounted, heavy duty, single-tooth, ripping attachment mounted on a track type tractor having a power rating of at least 250 flywheel horsepower unless otherwise specified in section 10.

Wheel tractor-scraper is a self-loading (not elevating) and unloading scraper having a struck bowl capacity of at least 12 cubic yards.

Pusher tractor is a track type tractor having a power rating of at least 250 flywheel horsepower equipped with appropriate attachments.

Unclassified excavation is defined as the excavation of all materials encountered, including rock materials, regardless of their nature or the manner in which they are removed.

3. Blasting The transportation, handling, storage, and use of dynamite and other explosives shall be directed and supervised by a person(s) of proven experience and ability who is authorized and qualified to conduct blasting operations.

Blasting shall be done in a manner as to prevent damage to the work or unnecessary fracturing of the underlying rock materials and shall conform to any special requirements in section 10 of this specification. When specified in section 10, the contractor shall furnish the engineer, in writing, a blasting plan before blasting operations begin.

LA – South Grand Chenier Marsh Creation (ME-20) 21-2

4. Use of excavated material Method 1—To the extent they are needed, all suitable material from the specified excavations shall be used in the construction of required permanent earthfill or rockfill. The suitability of material for specific purposes is determined by the engineer. The contractor shall not waste or otherwise dispose of suitable excavated material.

Method 2—Suitable material from the specified excavations may be used in the construction of required earthfill or rockfill. The suitability of material for specific purposes is determined by the engineer.

5. Disposal of waste materials Method 1—All surplus or unsuitable excavated materials are designated as waste and shall be disposed of at the locations shown on the drawings.

Method 2—All surplus or unsuitable excavated materials are designated as waste and shall be disposed of by the contractor at sites of his own choosing away from the site of the work. The disposal shall be in an environmentally acceptable manner that does not violate local rules and regulations.

6. Excavation limits Excavations shall comply with OSHA Construction Industry Standards (29CFR Part 1926) Subpart P, Excavations, Trenching, and Shoring. All excavations shall be completed and maintained in a safe and stable condition throughout the total construction phase. Structure and trench excavations shall be completed to the specified elevations and to the length and width required to safely install, adjust, and remove any forms, bracing, or supports necessary for the installation of the work. Excavations outside the lines and limits shown on the drawings or specified herein required to meet safety requirements shall be the responsibility of the contractor in constructing and maintaining a safe and stable excavation.

7. Borrow excavation When the quantities of suitable material obtained from specified excavations are insufficient to construct the specified earthfills and earth backfills, additional material shall be obtained from the designated borrow areas. The extent and depth of borrow pits within the limits of the designated borrow areas shall be as specified in section 10 or as approved by the engineer.

Borrow pits shall be excavated and finally dressed to blend with the existing topography and sloped to prevent ponding and to provide drainage.

8. Overexcavation Excavation in rock beyond the specified lines and grades shall be corrected by filling the resulting voids with portland cement concrete made of materials and mix proportions approved by the engineer. Concrete that will be exposed to the atmosphere when construction is completed shall meet the requirements of concrete selected for use under Construction Specification 31, Concrete for Major Structures, or 32, Structure Concrete, as appropriate.

Concrete that will be permanently covered shall contain not less than five bags of cement per cubic yard.

The concrete shall be placed and cured as specified by the engineer.

Excavation in earth beyond the specified lines and grades shall be corrected by filling the resulting voids with approved, compacted earthfill. The exception to this is that if the earth is to become the subgrade for riprap, rockfill, sand or gravel bedding, or drainfill, the voids may be filled with material conforming to the specifications for the riprap, rockfill, bedding, or drainfill. Before correcting an overexcavation condition, the contractor shall review the planned corrective action with the engineer and obtain approval of the corrective measures.

LA – South Grand Chenier Marsh Creation (ME-20) 21-3

9. Measurement and payment For items of work for which specific unit prices are established in the contract, the volume of each type and class of excavation within the specified pay limits is measured and computed to the nearest cubic yard by the method of average cross-sectional end areas or by methods outlined in section 10 of this specification. Regardless of quantities excavated, the measurement for payment is made to the specified pay limits except that excavation outside the specified lines and grades directed by the engineer to remove unsuitable material is included. Excavation required because unsuitable conditions result from the contractor's improper construction operations, as determined by the engineer, is not included for measurement and payment.

Method 1—The pay limits shall be as designated on the drawings.

Method 2—The pay limits shall be defined as follows:

a. The upper limit shall be the original ground surface as it existed before the start of construction operations except that where excavation is performed within areas designated for previous excavation or earthfill, the upper limit shall be the modified ground surface resulting from the specified previous excavation or earthfill.

b. The lower and lateral limits shall be the neat lines and grades shown on the drawings.

Method 3—The pay limits shall be defined as follows:

a. The upper limit shall be the original ground surface as it existed before the start of construction operations except that where excavation is performed within areas designated for previous excavation or earthfill, the upper limit shall be the modified ground surface resulting from the specified previous excavation or earthfill.

b. The lower and lateral limits shall be the true surface of the completed excavation as directed by the engineer.

Method 4—The pay limits shall be defined as follows:

a. The upper limit shall be the original ground surface as it existed before the start of construction operations except that where excavation is performed within areas designated for previous excavation or earthfill, the upper limit shall be the modified ground surface resulting from the specified previous excavation or earthfill.

b. The lower limit shall be at the bottom surface of the proposed structure.

c. The lateral limits shall be 18 inches outside of the outside surface of the proposed structure or shall be vertical planes 18 inches outside of and parallel to the footings, whichever gives the larger pay quantity, except as provided in d below.

d. For trapezoidal channel linings or similar structures that are to be supported upon the sides of the excavation without intervening forms, the lateral limits shall be at the underside of the proposed lining or structure.

LA – South Grand Chenier Marsh Creation (ME-20) 21-4

e. For the purposes of the definitions in b, c, and d, above, any specified bedding or drainfill directly beneath or beside the structure will be considered to be a part of the structure.

All methods—The following provisions apply to all methods of measurement and payment.

Payment for each type and class of excavation is made at the contract unit price for that type and class of excavation. Such payment will constitute full compensation for all labor, materials, equipment, and all other items necessary and incidental to the performance of the work except that extra payment for backfilling overexcavation will be made in accordance with the following provisions.

Payment for backfilling overexcavation, as specified in section 8 of this specification, is made only if the excavation outside specified lines and grades is directed by the engineer to remove unsuitable material and if the unsuitable condition is not a result of the contractor's improper construction operations as determined by the engineer.

Compensation for any item of work described in the contract, but not listed in the bid schedule is included in the payment for the item of work to which it is made subsidiary. Such items and the items to which they are made subsidiary are identified in section 10 of this specification.

10. Items of work and construction details (next page)

NRCS- May 2018 July 2018 – Amendment 2 LA – South Grand Chenier Marsh Creation (ME-20) 21-5

10. Items of work and construction details Items of work to be performed in conformance with this specification and construction details are:

10.1 Subsidiary Item, Excavation, Containment Dikes

10.1.1 Item scope

This item shall consist of the excavation required to construct the containment dikes as shown on the construction drawings and maintain the dikes as required.

10.1.2 Work schedule

The Contractor will be allowed to perform excavation for dike construction 12 hours per day, 7 days per week. Excavation outside of these hours during initial dike construction will be prohibited.

During excavation for marsh fill operations, the Contractor may perform excavation for dike maintenance 24 hours per day, 7 days per week.

10.1.3 Excavation classification

In Section 2 of this specification, the classification will be Common Excavation. There is no knowledge of existing rock in the borrow area. However, this does not imply with certainty that rock does not exist in the borrow area.

10.1.4 Use of excavated material

In Section 4 of this specification, Use of Excavated Material, Method 1 shall apply.

10.1.5 Disposal of waste materials

In Section 5, Disposal of waste materials, Method 2 shall apply. Surplus and unsuitable excavated soil may be disposed of by sidecasting into the marsh creation area. Natural woody or vegetative material also may be disposed of by sidecasting into the marsh creation area provided it is completely covered by the marsh creation fill material. No woody material shall be placed in the earthen containment dike. All other debris shall be considered unsuitable material and shall be disposed of in an approved landfill in accordance with Section 5. The Contractor shall submit the proposed landfill to the CO prior to mobilization of any construction equipment to the project site.

10.1.6 Protective buffer

No construction equipment will be allowed on the containment dike berm within 15 feet of the toe of the containment dike.

10.1.7 Borrow areas

The designated borrow areas referred to in Section 7 of this specification shall be within the marsh creation areas and as shown in the plans. The contractor shall determine the necessary size necessary to ensure that an adequate quantity of suitable material is present within the borrow area. The contractor must notify the CO in the Work Plan of the anticipated width, depth, and sides slope of the borrow area. The borrow areas are located within the marsh creation cells and shall be used for both initial construction and maintenance of the containment dikes.

10.1.8 Payment

No separate payment will be made for this item. Payment for this item will be included in the payment for Bid Item 4, Earthfill, Containment Dikes.

10.2 Bid Item 7, Excavation for Marsh Creation Fill

10.2.1 Item scope

This item shall consist of the excavation necessary to provide the material needed to fill the marsh creation areas to the lines and grades as shown on the construction drawings, and any other items of work required for performing and completing this item.

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10.2.2 Work schedule

The Contractor will be allowed to perform excavation for marsh creation fill 24 hours per day, 7 days per week.

10.2.3 Excavation classification

In Section 2 of this specification, the classification will be Unclassified Excavation. There is no knowledge of existing rock in the borrow area. However, this does not imply with certainty that rock does not exist in the borrow area.

10.2.4 Use of excavated material

In Section 4 of this specification, Use of Excavated Material, Method 1 shall apply.

10.2.5 Disposal of waste materials

In lieu of Section 5 of this specification, disposal shall be as follows: All excavated material shall be placed in the marsh creation areas as shown on the drawings. In the event woody debris is discovered during the excavation, the woody debris may be disposed of in the marsh creation cells provided it is completely covered by the marsh creation fill material. Otherwise, any woody material shall be removed and disposed of offsite.

10.2.6 Borrow area magnetometer survey

The contractor is required to perform a magnetometer survey investigation of the Gulf of Mexico borrow area before beginning the marsh creation excavation. The survey shall be performed in accordance with Construction Specification 7 – Construction Surveys. The magnetometer survey report must be approved by the COR before excavation in the borrow area may begin

10.2.7 Minimum Dredge Size

The dredge used in the Gulf of Mexico excavation for marsh creation fill shall be a cutterhead pipeline dredge with a discharge line size of 30 inches or greater.

10.2.8 Discharge pipeline corridor

The pipeline used for transport of material for marsh creation fill shall follow the discharge pipeline route shown in the construction drawings and shall remain in the discharge pipeline corridor designated in the drawings.

10.2.9 Protection of Beach and Price Lake Unit Levee

The beach and Price Lake Unit Levee shall be protected from damage by any equipment or activity related to the construction of this project. Contractor shall propose a method for protecting the beach and the levee at all areas where it must be crossed by equipment or pipelines. The location, extent, and quality of installed protection measures must be approved by the COR in the field.

10.2.10 Maintaining flow/traffic in Hog Bayou and Second Lake Access for small vessels and flow in Hog Bayou and Second Lake shall not be blocked or significantly impeded by equipment or activity related to the construction of this project.

10.2.11 Pipe required on site before commencing excavation in the Gulf of Mexico Before the excavation operation for this item can commence, the contractor shall have on site the required length of discharge pipe to reach from the furthest point in the borrow area to the furthest point in the marsh creation placement area.

10.2.12 Marking discharge pipelines

Floating or submerged discharge pipelines and all possible hazards from discharge pipe or other equipment shall be marked and lighted in a manner that will alert the boating public and be in accordance with United States Coast Guard regulations for this type of operation.

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10.2.13 Commencement and termination notification

The contractor shall notify the COR within 24 hours of the commencement and termination of excavation activities for this item.

10.2.14 Borrow area management

Excavation for this item shall be confined to the designated borrow area in the Gulf of Mexico as shown in the drawings. The maximum depth of cut in the borrow area is -38.5 feet NAVD 88, GEOID99. The allowable over-excavation tolerance is 3.0 feet to an elevation of -41.5 feet NAVD 88, GEOID99. At no time shall the cutter head operate below a -41.5 feet elevation. The entire compartment, excluding areas along the perimeter necessary for side slopes or buffer zones, shall be excavated to elevation -38.5 feet in each of the 200-foot wide compartments shown on the construction drawings before proceeding to the next compartment. Side slopes shall be as required to maintain stability and prevent sloughing from areas outside of the borrow area. The first compartment to be excavated is C1. The contractor shall proceed to the next excavation compartment in ascending order, C1 through C7. In the event the contractor’s excavation methods cut less than the 200 ft. wide compartment to the elevation of -38.5 feet, the contractor will be allowed to horizontally over excavate into the adjacent compartment provided all material is removed to the desired elevation of -

38.5 feet in the initial compartment. The intent of this requirement is to prevent stripping large surface areas of just an upper stratum of soil. The contractor may submit an alternate plan to the COR for consideration relative to meeting the intent of this requirement. Any alternate plan must be approved by the CO and COR before the Contractor may deviate from the requirements of this section.

10.2.15 Disturbance of water bottom outside of borrow area

The excavation equipment used for this item shall not be anchored, spudded, or in any other way disturb the water bottom outside of the borrow area. If a buffer zone is needed to allow for anchoring inside the borrow area, it should be included in the Work Plan specified in Construction Spec 94.

10.2.16 Recording excavation equipment position

The contractor shall maintain RTK GPS equipment on the excavation equipment used for this item.

The GPS shall be installed as close to the cutterhead as practicable. This GPS shall be used to continually record the position and depth of the excavation equipment.

10.2.17 Measurement and payment

In Section 9 of this specification, Method 3 shall apply. Payment will be made at the contract unit price. Payments shall be based on the quantity measured in accordance with the following paragraphs.

Payment will constitute full compensation for all labor, equipment, and material and for Subsidiary Item, Earthfill, Marsh Creation Fill; Subsidiary Item, Excavation, Staging Area and Price Lake Road;

Subsidiary Item, Excavation, Hog Bayou Dredge Pipe Crossing; Subsidiary Item, Earthfill, Staging Area and Price Lake Road; Subsidiary Item, Earthfill, Hog Bayou Dredge Pipe Crossing; Subsidiary Item, Rockfill, Staging Area and Price Lake Road; Subsidiary Item, Traffic Control, Staging Area and Price Lake Road; and all other items necessary and incidental to the completion of the work.

10.2.17.1 Measurement for progress payments

Measurement for progress payments shall be performed by the contractor in accordance with Construction Specification 7 – Construction Surveys. All measurement and computational data utilized to determine progress payments quantities shall be provided to the COR a minimum of seven (7) days prior to requesting payment.

10.2.17.2 Notification of completion and measurement for final payment Contractor shall notify the COR immediately upon completion of excavation activities and provide final transect surveys of all marsh creation cells. When completion is concurred in by the

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COR, within 72 hours, the NRCS will perform the final after-excavation quantity survey that will be used for payment purposes. The survey will be performed at the same locations and intervals as the before-excavation surveys, as shown on the plans. NRCS before-excavation and after-excavation surveys will be used to compute quantities for final payment. Payment will be made only for those portions of the borrow area where excavation has been made to elevation not to exceed -41.5 ft. NAVD88 and for those areas around the perimeter of the borrow area where excavation is limited by the side slopes. In areas limited by side slopes, payment will be made to the elevations defined by the slopes. No payment shall be made for excavation below elevation -41.5 ft. NAVD88.

10.3 Subsidiary Item, Excavation, Staging Area and Price Lake Road

10.3.1 Item scope

Due to remoteness and limited access on this project, the Contractor has the discretion to utilize Price Lake Road for equipment access as well as construct a staging area at the end of Price Lake Road as shown on the drawings. If neither of these options are chosen by the Contractor, this section does not apply. If either of these options are utilized, then this section shall provide the requirements of constructing the staging area as well as the maintenance required on Price Lake Road and the staging area.

10.3.2 Work schedule

The Contractor will be allowed to perform excavation for 12 hours per day, 7 days per week.

10.3.3 Excavation classification

In Section 2 of this specification, the classification will be Common Excavation. There is no knowledge of existing rock in the borrow area. However, this does not imply with certainty that rock does not exist in the borrow area.

10.3.4 Use of excavated material

In Section 4 of this specification, Use of Excavated Material, Method 1 shall apply.

10.3.5 Disposal of waste materials

In Section 5, Disposal of waste materials does not apply. All excavated material will be utilized.

Material not suitable to support equipment loading shall be utilized on the side slopes of the staging area. Excavation should be kept the absolute minimum required.

10.3.6 Protective buffer

Construction equipment must take care not to damage the 25 feet berm between the toe of the staging area/Price Lake Road and the borrow area shown on the drawings.

10.3.7 Borrow areas

The designated borrow areas referred to in Section 7 of this specification shall be as shown in the plans. The Contractor must include in the Work Plan the anticipated width, depth, and sides slope of the borrow area.

10.3.8 Maintenance

Maintenance will be as required in Construction Specification 23 – Earthfill.

10.3.9 Payment

No separate payment will be made for this item. Payment for this item will be included in the payment for Bid Item 7, Excavation for Marsh Creation Fill Bid Item 9, Staging/Price Lake Rd.

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10.4 Subsidiary Item, Excavation, Hog Bayou Dredge Pipe Crossing

10.4.1 Item scope

This item shall provide the requirements for the excavation necessary to bury the dredge pipe at the locations shown on the drawings across Hog Bayou.

10.4.2 Work schedule

The Contractor will be allowed to perform excavation for 12 hours per day, 7 days per week.

10.4.3 Excavation classification

In Section 2 of this specification, the classification will be Common Excavation. There is no knowledge of existing rock in the borrow area. However, this does not imply with certainty that rock does not exist in the borrow area.

10.4.4 Use of excavated material

In Section 4 of this specification, Use of Excavated Material, Method 1 shall apply. All material shall be placed such that the dredge pipe has at least 2 foot of cover and access by small vessels is not restricted. The Contractor must maintain Hog Bayou at or below preconstruction depths as long as the dredge pipe is located in this area.

10.4.5 Disposal of waste materials

In Section…