Amend-0001-W912HY19B0030.pdf

W45VAK91543579 007780

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

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)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

Continued on Page 2.

1. CONTRACT ID CODE PAGE OF PAGES

J 1

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

16C. DATE SIGNED

BY

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

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

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X W912HY19B0030

X 9B. DATED (SEE ITEM 11)

26-Jul-2019

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

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

Offer 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 telegram 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 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.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

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

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

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

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, 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.)

Unrestricted Procurement for Houston Ship Channel, Texas, Clinton PA Improvements in Harris County, Texas in w hich the response date is scheduled for 26 Aug 19 @ 3:00 PM is hereby amended as follows:

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO.

5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

07-Aug-2019

CODE

USAED, GALVESTON

CONTRACTING DIVISION

2000 FORT POINT ROAD

GALVESTON TX 77553-1229

W912HY 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912HY19B0030

A0001-2

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

1. The specifications for Solicitation No. W912HY19B0030, Houston Ship Channel, Texas, Clinton East & West Placement Areas in Harris County, Texas, Containment Dike Raise and Dewatering are hereby amended as follows:

a) Specifications.

(1) SECTION 31 23 16.00 45, DEWATERING – The enclosed SECTION 31 23 16.00 45 entitled DEWATERING supersedes that issued with this Solicitation.

b) Drawings.

(1) None.

2. This amendment shall be attached to and become a part of the solicitation.

1 Encls:

1. SECTION 31 23 16.00 45, DEWATERING

SWG FILE NO.: HSC 401-576 Solicitation No. : W912HY19B0030

SECTION TABLE OF CONTENTS

DIVISION 31 - EARTHWORK

SECTION 31 23 19.00 45

DEWATERING

PART 1 GENERAL

1.1 SUMMARY

1.2 MEASUREMENT AND PAYMENT

1.3 DITCH SURVEYS

1.4 SUBMITTALS

1.5 NOTIFICATION PRIOR TO COMMENCEMENT OF DEWATERING OPERATIONS

1.6 PIPELINES/UTILITIES ACROSS THE LIMITS OF DEWATERING

1.7 CHARACTER OF MATERIALS

1.7.1 Material

1.7.2 Debris

1.8 EXCAVATION WORK PLAN

1.8.1 Excavation Equipment

1.9 PRESERVATION OF PUBLIC AND PRIVATE PROPERTY

1.9.1 Damages

1.9.2 Accountability and Restoration

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION

3.1 ESTIMATED QUANTITIES

3.1.1 Estimated Quantities For Dewatering The Ditches

3.2 DITCHING

3.3 COLLECTOR SUMP AREA

3.4 ORDER OF WORK

3.5 DRAINAGE DITCHES

3.5.1 General

3.5.2 Ditches

3.5.3 Placing Material

3.5.4 Ditch Side Slopes

3.5.5 Maintenance

3.5.5.1 Interior Lateral Ditches

3.5.5.2 Perimeter Ditch

3.5.5.3 Collector Sump Area

3.5.6 Unauthorized Placement of Material

3.5.6.1 Misplaced Excavated Material

3.5.6.2 Debris Disposal

3.6 SURFACE DRAINAGE

3.6.1 Drainage

3.6.2 Existing Drop-Outlet Structure

3.6.3 Weir Boards

3.7 CONTRACTOR QUALITY CONTROL

3.7.1 Compliance Inspection

3.7.2 Records

SECTION 31 23 19.00 45 Page 1

TO ACCOMPANY AMENDMENT NO. 0001 TO SOLICITATION NO W912HY19B0030

-- End of Section Table of Contents --

SECTION 31 23 19.00 45 Page 2

SECTION 31 23 19.00 45

DEWATERING

AMENDMENT NO. 0001

PART 1 GENERAL

1.1 SUMMARY

The work covered in this Section consists of furnishing plant, labor, materials, and equipment and performing the work specified herein and as shown, to construct drainage ditches and appurtenant items. The work includes excavating perimeter ditches, lateral ditches and dewatering East and West Clinton Placement Areas (PA) to facilitate the remaining phases of PA improvement; however, the water is not to be completely removed by this work.

1.2 MEASUREMENT AND PAYMENT

Measurement and payment for dewatering will be paid for in accordance with provisions of SECTION 01 22 00.10 MEASUREMENT AND PAYMENT.

1.3 DITCH SURVEYS

(1) Quantity surveys are to be conducted, and the data derived from these surveys will be used in computing the quantities of work performed and the actual construction completed and in place.

(2) The Contractor shall conduct the final surveys and surveys for any periods for which progress payments are requested. These surveys shall be conducted under the direction of a representative of the Contracting Officer, unless the Contracting Officer waives this requirement in a specific instance. The Government will make the computations that are necessary to determine the quantities of work performed or finally in place. The Contractor shall make the computations based on the surveys for any periods for which progress payments are requested. Monthly progress surveys shall determine the length of ditches excavated and approximate percentage of a section of ditch meeting final template requirements. Cross sections of the ditch, for progress payment purposes, will not be required. For acceptance, cross sections of the ditches will be required. Cross sections shall be on 500-foot intervals.

(3) Promptly upon completing a survey, the Contractor shall submit the originals of field notes and other records relating to the survey or to the layout of the work to the Contracting Officer, who will use them as necessary to determine the amount of progress payments. The Contractor shall retain copies of the material submitted to the Contracting Officer.

1.4 SUBMITTALS

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

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

SECTION 31 23 19.00 45 Page 3

SD-01 Preconstruction Submittals

Notification Prior To Commencement of Dewatering Operations ; G

Excavation Work Plan ; G

Excavation Equipment ; G

Order Of Work ; G

1.5 NOTIFICATION PRIOR TO COMMENCEMENT OF DEWATERING OPERATIONS

Notify the Houston Resident Engineer in writing at least 10 days prior to commencement of dewatering operations of the location or locations at which a ditching machine or machines will be placed on the work. This information is required in addition to the progress charts and schedules provided for in the CONTRACT CLAUSE entitled SCHEDULE FOR CONSTRUCTION

CONTRACTS.

1.6 PIPELINES/UTILITIES ACROSS THE LIMITS OF DEWATERING

Pipelines/Utilities are known to cross the work area, however the Contractor is urged to investigate the site to determine if any pipelines/utilities have been placed under or over the work area.

EVERY EFFORT HAS BEEN MADE TO GIVE PERTINENT DETAILS ON THE LOCATION

OF THE PIPELINES/UTILITIES. THE DATA FURNISHED ON THE PLANS ARE

BELIEVED TO BE SUBSTANTIALLY CORRECT. HOWEVER, THE EXACT LOCATIONS

MAY VARY FROM THAT SHOWN: THEREFORE, THE CONTRACTOR IS TO COOPERATE

WITH THE RESPECTIVE OWNERS TO ESTABLISH THE ACTUAL POSITION OF THE

PIPELINES/UTILITIES. THE U.S. ARMY CORPS OF ENGINEERS PERMITS OF THE

RESPECTIVE PIPELINES/UTILITIES AND PREVIOUS SURVEYS ARE AVAILABLE IN

THE HOUSTON RESIDENT OFFICE.

THE FOLLOWING IS FURNISHED FOR INFORMATION TO VERIFY PIPELINE/UTILITY

OWNERSHIPS:

Lonestar Notification Center 1-800-545-6005 or online at www.Lonestar811.com

Texas 811 (Dig-Tess) 1-800-344-8377

1.7 CHARACTER OF MATERIALS

1.7.1 Material

The material that is to be removed is composed of material deposited over a period of time from maintenance dredging of the Houston Ship Channel.

However, some virgin material may be encountered in the prescribed depth.

Bidders are expected to examine the worksite and after investigation decide for themselves the character of the materials.

1.7.2 Debris

Other materials, including scrap, rope, wire cable, snags, and stumps may be encountered in the specific limits and no separate payment will be made for removal and disposal of this debris.

SECTION 31 23 19.00 45 Page 4

1.8 EXCAVATION WORK PLAN

Prepare and submit at the pre-construction meeting, an excavation work plan for the excavation work. The excavation work plan is to include the sequence of works needed to complete the ditch excavation for the collector sumps, interior lateral and perimeter ditches.

1.8.1 Excavation Equipment

Prepare and submit a list of equipment to be used in this Contract. The proposed equipment will be robust and capable to perform successful excavation operations in a super saturated and soft ground situation.

Equipment will be sized to have longer service reach to perform sump excavation and perimeter excavation. Equipment for interior ditch excavation shall be capable of working on supersaturated soil conditions.

1.9 PRESERVATION OF PUBLIC AND PRIVATE PROPERTY

1.9.1 Damages

Fences, roads, ditches, private or public grounds, and other structure(s) or improvements damaged as a result of the Contractor's operations herein specified will be repaired or rebuilt by the Contractor at its expense.

1.9.2 Accountability and Restoration

Preserve and protect the existing informational and directional signs, camp facilities, water wells and tanks, station markers, mile markers, and mooring piles which have been established along either bank of the Waterway within the reaches of the operations covered herein. The Contractor is to be accountable for and will be required to replace or restore at its expense the signs, camp facilities, water wells and tanks, markers, and mooring piles damaged or destroyed as a result of operations herein specified.

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION

3.1 ESTIMATED QUANTITIES

3.1.1 Estimated Quantities For Dewatering The Ditches

The approximate lengths of perimeter ditch and interior lateral ditches to be excavated for Clinton PAs are as shown in SECTION 00 11 00.00 45 BID

SCHEDULE.

3.2 DITCHING

The layout and general alignment of the ditches are shown, for which the estimated quantities are based. The Contracting Officer has the authority to direct the Contractor to modify the alignment to better facilitate dewatering processes in either of the Clinton PAs.

3.3 COLLECTOR SUMP AREA

The sump area is located in the front of the existing drop-outlet structure. The bottom of the collector sump is to be graded to drain

SECTION 31 23 19.00 45 Page 5 toward the invert of the drop-outlet structure discharge pipes. The dimension and depth of excavation are shown.

3.4 ORDER OF WORK

Begin work by excavating the collector sump, adjacent to the drop-outlet structure; then excavating the perimeter ditch. Lateral ditches may be excavated once sufficient perimeter ditch has been dug to allow removal of water from the lateral ditches. The ditches are to be kept open during these operations. The following order work applies for both East and West Clinton PAs. Furthermore, the effort of DEWATERING needs to take place first in West Clinton PA and then continue on East Clinton PA.

1. Excavate the collector sump. Excavation will start at the drop-outlet structure and proceed to interior of the PA.

2. Excavate the perimeter ditch simultaneously from the drop-outlet structure vicinity from lower elevations to higher elevations;

3. Excavate the interior ditches from lower elevations to higher elevations.

3.5 DRAINAGE DITCHES

3.5.1 General

Inspect the PA to ensure that using the Areas for dewatering operations will not place them in violation of the applicable Federal, State, or local statutes concerning fish and wildlife. Particular statutes the Contractor are to consider include, but are not limited to, the Federal Migratory Bird Treaty Act and the Endangered Species Act of 1973.

3.5.2 Ditches

Ditches are to be excavated to not less than the minimum required cross section and depth as shown. It is necessary to excavate these ditches in several passes or steps, beginning with a shallow ditch and then deepening it in stages until the required depth and bottom width is achieved. This is due to the deposited dredge materials which are composed of a mixture of silts, clay, and fine sands which are very soft and saturated. There may be a layer of surface desiccation crust formed in some areas.

However, there is no guarantee the sub-stratum will be firm enough to form the desired slopes. If the Contractor attempts to excavate the ditches to their full depth on the first pass, it is likely that the side slopes will slough off due to excess water in the material and inadequate shear resistance. However, if the ditch is initially excavated to some cross section less than full depth, the Contractor should allow the excavated areas to aerate for a period of days while work progresses elsewhere.

Once the sides of the ditch and the material in the vicinity are aerated, the slope could be in a stable condition and maintain its shape. The ditch can then be deepened on subsequent passes. If the side slopes of the ditch are not in a stable condition, allow a minimum of 14 days for the soil to aerate between passes. Progressive ditching operations are to be carried out only after the Contracting Officer's inspection and approval. Schedule No. 1 is based on a section of ditch requiring five passes for the perimeter ditch and five passes for the interior lateral ditches for acceptance of that section; Sump areas are paid by excavation to the prescribed dimensions shown.

SECTION 31 23 19.00 45 Page 6

3.5.3 Placing Material

(AM#1) The excavated materials from the perimeter ditch and collector sumps are to be placed on the interior of the PA as shown on the drawings . The material excavated from the perimeter ditches and collector sumps shall not be placed within the foundation of the embankment, access dike and stability berm, or within the foot-print of the interior lateral ditches.

In addition, the excavated material is not to be intended to be deposited in a continuous method, but to be placed in an alternating fashion to facilitate drainage, refer below for more details. If the interior lateral ditches are performed with a conventional bucket excavator, the material from the interior lateral ditches is not to be deposited in a continuous method, but is to be placed in an alternating fashion to facilitate drainage. Stockpile materials on the same side of the ditch will have a separation gap and not be placed in one continuous line placement.

3.5.4 Ditch Side Slopes

The side slopes are to be angle of repose or not steeper than 3 horizontal and 1 vertical.

3.5.5 Maintenance

The Contractor will be responsible for maintenance of the ditches until acceptance. Collapse or sloughing of the ditches occurring prior to acceptance are to be corrected until they conform to the minimum requirements of this Contract. Corrective actions will be at the Contractor's expense. There will be reaches in the PA where the perimeter ditch will require cleaning only. The perimeter ditch is to drain to the drop-outlet structures, to relieve the water in the perimeter ditch and interior lateral ditches.

3.5.5.1 Interior Lateral Ditches

Prior to acceptance of interior lateral ditches, the Contractor will be responsible for correcting any collapse or sloughing of the ditches which causes obstruction of water flowing toward the perimeter ditch.

3.5.5.2 Perimeter Ditch

Prior to acceptance of the perimeter ditch, the Contractor will be responsible for correcting any collapse or sloughing of the ditch which causes obstruction of water flowing toward the collector sump areas.

3.5.5.3 Collector Sump Area

Prior to acceptance of collector sump areas, the Contractor will be responsible for correcting any collapse or sloughing of the slopes which cause obstruction of water flowing toward the drainage pipes of the drop-outlet structures.

3.5.6 Unauthorized Placement of Material

3.5.6.1 Misplaced Excavated Material

Excavated material that is deposited other than in places designated or approved will not be paid for and the Contractor may be required to remove the misplaced excavated material and deposit it where directed at no

SECTION 31 23 19.00 45 Page 7 additional cost to the Government.

3.5.6.2 Debris Disposal

During the progress of the work, do not deposit worn out wire rope, scrap metal, timbers, other rubbish, or obstructive material in the PA or along the banks of the navigable waters, except as specified herein.

3.6 SURFACE DRAINAGE

3.6.1 Drainage

Areas disturbed or affected by the work in this Contract are to be sloped or shaped to provide positive drainage of surface water.

3.6.2 Existing Drop-Outlet Structure

Existing drop-outlet structures are to be cleared of mud, silt, debris, or other material that can interfere with the proper functioning of the drop-outlet structure and normal surface drainage. Replace bad, broken, and unusable weir boards with new boards of same dimensions. The weir boards are to be installed high enough to prevent any solids flowing into the discharge pipes and block the conveyances. The collector sump area is to be connected to the invert of the drop-outlet structure. The perimeter ditch is to be connected to the sump area.

3.6.3 Weir Boards

The boards of drop-outlet structures are to be managed for suspended solids and rate of dewatering during the Contract. Refer to SECTION 01 45 01.00 QUALITY CONTROL for Water Quality Testing requirements.

3.7 CONTRACTOR QUALITY CONTROL

3.7.1 Compliance Inspection

Inspect for compliance with the Contract requirements and record the inspection of operations including, but not limited to, the following:

(1) Clean out the conveyance blockages within the ditches;

(2) Clean out blockages in front of the existing drop-outlet structures;

(3) Remove any built-up sediments and remove any obstructions from preventing flow path into the drainage pipes.

(4) Prevent debris flowing to the collector sump areas.

(5) Keep the discharge drainage pipe conveyance free of blockage and open at all times.

(6) Survey and check the flow line of ditches at the in-flow invert and out-flow invert to assure positive drainage.

3.7.2 Records

A copy of the records of inspections, tests, and corrective action taken is to be submitted as directed.

SECTION 31 23 19.00 45 Page 8

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SECTION 31 23 19.00 45 Page 10