B3_AMEND0001.pdf

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

Amendment 0001 is issued to:

See pages follow ing:

RESPONSE DATE IS NOT EXTENDED.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 2

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 W9126G-16-B-0003

X 9B. DATED (SEE ITEM 11)

04-Mar-2016

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 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 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.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

18-Mar-2016

CODE

US ARMY CORPS OF ENGINEERS FORT WORTH

2000 FORT POINT ROAD

GALVESTON TX 77550-1229

W9126G 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W9126G-16-B-0003

A0001-2

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

1. The specifications for Solicitation No. W9126G-16-B-0003, Galveston Intracoastal Waterway, Texas, Galveston Causeway Galveston County, Texas, Underwater Demolition and Debris Removal are hereby amended as follows:

a) Specifications.

(1) SECTION 02 41 16.01 45, UNDERWATER DEMOLITION AND DEBRIS REMOVAL –

The enclosed SECTION 02 41 16.01 45, entitled UNDERWATER DEMOLITION AND DEBRIS REMOVAL, supersedes that issued with this Solicitation.

(2) SECTION 02 41 16.01 45, UNDERWATER DEMOLITION AND DEBRIS REMOVAL,

APPENDIX A – The enclosed APPENDIX A, shall be inserted at the end of SECTION 02 41

16.01 45, entitled UNDERWATER DEMOLITION AND DEBRIS REMOVAL.

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

2 Encls:

1. SECTION 02 41 16.01 45, UNDERWATER DEMOLITION AND DEBRIS REMOVAL

2. SECTION 02 41 16.01 45, UNDERWATER DEMOLITION AND DEBRIS REMOVAL,

APPENDIX A

SWG FILE NO.:IWW 1101-292 SOLICITATION NO.: W9126G-16-B-0003

SECTION TABLE OF CONTENTS

DIVISION 02 - EXISTING CONDITIONS

SECTION 02 41 16.01 45

UNDERWATER DEMOLITION AND DEBRIS REMOVAL

PART 1 GENERAL

1.1 SUMMARY

1.2 MEASUREMENT AND PAYMENT

1.3 PRE-BID CONFERENCE

1.4 PRE-BID INSPECTION

1.5 REFERENCES

1.6 DEFINITIONS

1.6.1 Monopile Fender Remnants

1.6.2 Timber Piling Fender Remnants

1.6.3 Old Causeway Concrete Foundation Remnants

1.6.4 Rubble

1.7 SUBMITTALS

1.8 USE OF EXPLOSIVES

1.9 LOCATION

1.10 OBSTRUCTIONS TO NAVIGABLE WATERS

1.11 TITLE TO SALVAGE

1.12 SAFETY

1.13 DEMOLITION AND DEBRIS REMOVAL PLAN (DDRP)

1.14 UTILITIES ACROSS THE LIMITS OF DREDGING

1.14.1 Known Pipeline/Utility Crossings

1.14.2 Survey Reports for Utility Line Crossings

1.14.2.1 Sub-bottom Profile Survey

1.14.2.2 Magnetometer Survey

1.15 NOTIFICATION PRIOR TO COMMENCEMENT OF DEMOLITION AND REMOVAL

OPERATIONS

1.16 TEMPORARY REMOVAL OF AIDS TO NAVIGATION

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION

3.1 GENERAL

3.1.1 Underwater Demolition

3.1.2 Underwater Debris

3.2 REMOVAL REQUIREMENTS

3.2.1 Underwater Demolition and Removal of Timber Piling Fender

Remnants

3.2.2 Underwater Demolition and Removal of Concrete Foundation

Remnants

3.2.3 Removal of Debris and Sediment from 125 Foot Wide Channel

Template

3.2.4 Removal of Debris and Sediment from 8 Target Areas Outside of the 125 Foot Wide Channel Template

3.2.5 Record of Pile Removal

SECTION 02 41 16.01 45 Page 1

(TO BE INCLUDED WITH AMENDMENT NO. 0001 TO SOLICITATION NO. W9126G-16-B-0003)

3.2.6 Work Logs

3.3 METHOD OF SEDIMENT REMOVAL AND MATERIAL PLACEMENT

3.4 RESPONSIBILITIES OF THE CONTRACTOR

3.4.1 General

3.5 VERIFICATION THAT WORK AREAS HAVE BEEN CLEARED

3.5.1 Trawling

3.5.1.1 Survey of Trawled Area

3.5.2 Multi-Beam Surveys

3.5.2.1 Survey Equipment and Quality Assurance(QA)/Quality

Control(QC)

3.5.2.2 Survey Limits

3.5.2.3 "Before Debris Removal" Multi-Beam Survey

3.5.2.4 "After Debris Removal" Multi-Beam Survey

3.5.2.5 Quantity Computations

3.5.2.6 Data Processing

3.5.2.7 Plots

3.5.2.8 Acceptance

3.6 CONDUCT OF DEMOLITION, DEBRIS REMOVAL AND EXCAVATION WORK

3.6.1 Adjacent Property and Structures

3.7 SIGNAL LIGHTS

3.8 DISPOSAL

3.8.1 Debris Materials

3.8.2 Disposal or Storage Area

3.8.3 Disposition

3.8.4 Sale or Salvage

3.9 MISPLACED MATERIAL

3.10 MECHANICAL DOWNTIME

3.11 INSPECTION

3.11.1 Compliance Inspection

3.11.2 Inspection

3.11.3 Deficient Work

3.11.4 Compliance

ATTACHMENTS:

APPENDIX A

APPENDIX A

-- End of Section Table of Contents --

SECTION 02 41 16.01 45 Page 2

SECTION 02 41 16.01 45

UNDERWATER DEMOLITION AND DEBRIS REMOVAL

AMENDMENT NO. 0001

PART 1 GENERAL

1.1 SUMMARY

The work to be performed under this Contract consists of furnishing plant, equipment, labor, and transportation, including the necessary fuel, power, and water to perform the work in strict accordance as specified herein for underwater demolition and mechanical dredging of old timber fender system remnants, monopile fender remnants, old causeway bridge concrete footings and piling remnants, removal of subsurface debris and sediment, screening debris and sediment, backfilling screened sediment within the work area limits and disposal of removed structures and debris material from the delineated work areas within and in the vicinity of the Gulf Intracoastal Waterway (GIWW) between Galveston Causeway and Galveston Railroad Bridge.

The limits of the work area are shown on the drawings. Removal of structures and debris includes removing sediment, separating out demolished structure and debris from the sediment, subsequent trawling operations, and final multi-beam surveying of the area to verify the delineated work areas and channel templates have been totally cleared as specified. The Contractor should expect to encounter hard objects that consist of concrete pieces in excess of 30 tons, concrete rubble piles and timber pilings from previously demolished fender systems, timber debris, steel, cables, and other unknown debris or structure not identified in this Contract.

1.2 MEASUREMENT AND PAYMENT

Measurement and payment for underwater demolition and debris removal will be paid for in accordance with provisions of the SECTION 01 22 00.10

MEASUREMENT AND PAYMENT.

1.3 PRE-BID CONFERENCE

A pre-bid teleconference is scheduled for Monday, 14 March 2016, at 10 AM (CDT). Access information is:

AUDIO: 877-336-1831

ACCESS CODE: 4489429

Security code: 8675

Bidders are encouraged to attend the pre-bid conference prior to submitting their bid.

1.4 PRE-BID INSPECTION

It is advisable that interested Bidders visit and inspect the work site before submitting their bids. Surveys of the specified channel reach and 3-D bottom surface imagery of the debris area are available for inspection at the Galveston District Office, P.O. Box 1229, Galveston, Texas 77553-1229. (AM#1)Texas Department of Transporations (TXDOT)Side-scan Sonar surveys and report of the specified channel reach are included as APPENDIX A located at the end of this Section. A USACE multi-beam survey

SECTION 02 41 16.01 45 Page 3 plot and Texas Department of Transportation (TXDOT) plan sheets of the old causeway and previous fender systems are included as For Information Only (FIO) reference drawings in this Contract.

1.5 REFERENCES

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

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 385-1-1 (2014) Safety and Health Requirements Manual

EM 1110-2-1003 (2013) Engineering and Design Hydrographic Surveying

1.6 DEFINITIONS

1.6.1 Monopile Fender Remnants

Monopile Fender Remnants consist of any remaining concrete rock and hardware debris from the six (6) previously demolished 25 foot diameter monopile structures, located along both sides of the 100 foot wide existing channel.

1.6.2 Timber Piling Fender Remnants

Timber Piling Fender Remnants consist of any remaining structure from the previously removed timber pile fender system of rows and cluster configurations, located along both sides of the 100 foot wide existing channel.

1.6.3 Old Causeway Concrete Foundation Remnants

Old Causeway Concrete Foundation Remnants consist of any remaining structure from the previously demolished causeway concrete foundations, battered piles, and structural supports, located within 100 feet of centerline of channel.

1.6.4 Rubble

Rubble includes the material left after breaking larger pieces of concrete. Rubble is not permitted on this project.

1.7 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. The following shall be submitted in accordance with the SECTION 01 33 00 SUBMITTAL PROCEDURES:

Government acceptance is required for submittals with a "G,A" designation.

SD-01 Preconstruction Submittals

Demolition and Debris Removal Plan; G,A AO

SECTION 02 41 16.01 45 Page 4

Submit for acceptance, a plan that includes the procedures, sequences and methods for underwater demolition, debris removal, screening of debris and sediment, backfilling of screened sediment and disposal of debris material, as specified in this Contract, no later than 14 calendar days after Contract award date.

Notification Prior to Commencement of Demolition and Removal Operations

Submit a written notice at least 10 calendar days prior to commencement of demolition and debris removal operations.

Survey Reports for Utility Line Crossings

Submit a sub-bottom profile and magnetometer survey report of each utility line crossing the GIWW within the work area limits, at least 10 calendar days prior to commencement of demolition and debris removal operations.

"Before Debris Removal" Multi-Beam Survey; G, AO

Submit a "Before Debris Removal" multi-beam survey, as specified, of the work area associated with demolition and debris removal in the vicinity of GIWW, Galveston Causeway to Galveston Railroad Bridge, within 15 calendar days prior to the start of debris removal work.

Temporary Removal of Aids to Navigation

The Contractor shall not remove, change the location of, obstruct, willfully damage, make fast to, or interfere with aids to navigation. Submit written notice at least 21 calendar days prior to the date that the temporary removal or change in location of channel markers will be required from Sta. 362+300 to Sta.

363+250 to facilitate demolition and debris removal operations.

SD-11 Closeout Submittals

Survey of Trawled Area; G, AO

Submit a survey report no later than 15 calendar days after completion of debris removal operations, that verifies the delineated work areas of GIWW from Galveston Causeway to Galveston Railroad Bridge have been trawled and are free of debris as specified herein.

"After Debris Removal" Multi-Beam Survey; G, AO

Submit "After Debris Removal" Multi-Beam Surveys, as specified, of the work area associated with demolition and debris removal in the vicinity of GIWW, Galveston Causeway to Galveston Railroad Bridge, within 15 calendar days after completion of debris removal work.

Work Logs

Submit copies of subcontractor work logs and timesheets, including but not limited to, dive, survey, ROV, and mesotech and

SECTION 02 41 16.01 45 Page 5 copies of diver, ROV, and mesotech videos, within 15 calendar days after completion of removal operations.

Record of Pile Removal

Submit a Record of Pile Removal including but not limited to, station location, embedded depth removed, and estimated total feet of timber piling removed, no later than 15 days after Government acceptance of the completed removal work.

1.8 USE OF EXPLOSIVES

Use of explosives will not be permitted on this project.

1.9 LOCATION

The underwater structure remnants and debris to be removed are located within the existing GIWW and in the vicinity of the GIWW, from Galveston Causeway to Galveston Railroad Bridge as shown.

1.10 OBSTRUCTIONS TO NAVIGABLE WATERS

The Government will not undertake to keep the Channel free from vessels or other obstructions, except to the extent of regulations, if any, as may be prescribed by the Secretary of the Army, in accordance with the provisions of Section 7 of the River and Harbor Act approved 8 August 1917. The Contractor will be required to conduct the work using a method that will obstruct navigation as little as possible, and if the Contractor's plant so obstructs the Channel as to make difficult or endanger the passage of vessels, said plant shall be promptly moved on the approach of a vessel as may be necessary to afford a practical passage. However, if the Contractor so requests in writing, navigation of the GIWW from Galveston Causeway to Galveston Railroad Bridge will be stopped for a period not to exceed 12 hours within this channel reach, following which the Contractor shall then cease work and clear the channel reach completely to permit the unrestricted flow of traffic for a period of at least 12 hours. The foregoing procedure for the alteration will be repeated as long as the Contractor so requests. The Contractor's written request shall be submitted 48 hours in advance of the day or dates and shall specify the period of the day when it desires that traffic be suspended so that navigation interests may be informed.

1.11 TITLE TO SALVAGE

Pursuant to Section 19 of the Rivers and Harbors Act of March 3, 1899 (33 U.S.C. 414), all rights and title vested in the Government in the property to be salvaged under the terms of this Contract and not herein reserved to the Government are conveyed to the Contractor immediately upon the Contractor's acknowledgment of the Notice to Proceed.

1.12 SAFETY

The Contractor shall be responsible for instructing employees in appropriate safety measures. The Contractor and personnel shall adhere to the applicable safety requirements as outlined in the USACE EM 385-1-1 and

SECTION 01 35 26.01 45 GOVERNMENTAL SAFETY REQUIREMENTS.

SECTION 02 41 16.01 45 Page 6

1.13 DEMOLITION AND DEBRIS REMOVAL PLAN (DDRP)

The Demolition and Debris Removal Plan shall include, as a minimum:

(1) Detailed prognosis of the demolition, debris removal, screening and disposal procedures of the specified work. The procedures and sequence shall provide for safe conduct of the work, careful removal and deposition of materials, and protection of personnel health, the environment, and property that is to remain undisturbed.

(2) Complete data concerning the methods, materials, equipment to be used for each operations.

(3) Proposed anchor plans, tie-down details, and stowage drawings.

(4) Contractor's contact list.

(5) Scheduling of all phases of the work.

(6) Address the applicable Activity Hazard Analysis and possible barge impact scenarios.

(7) As part of the disposal plan, include plans for offsite disposal of demolition/debris items and onsite backfilling of removed sediment into the work areas.

1.14 UTILITIES ACROSS THE LIMITS OF DREDGING

It is the Contractor's responsibility to investigate the location of utility crossings. (AM#1)Coordinate with City of Galveston and with Gulf Coast Water Authority to locate existing utility crossings. A copy of Permit No. SWG-2009-00625 for the existing 36-inch water main is included in APPENDIX A. Take precautions against damages which can result from work operations in the vicinity of the utility crossings. If damage occurs as a result of work operations, the Contractor will be required to suspend work until the damage is repaired and approved. Costs of these repairs and downtime of the dredge and attendant plant shall be at the Contractor's expense.

1.14.1 Known Pipeline/Utility Crossings

There are pipelines and or utilities which are within the work limits. The following pipeline/utilities cross the demolition and debris removal area(s):

Approximate Station

Permit No. Description Owner

362+625 3284 132kV Overhead Cable; 110' vertical clearance

H.L.&P. Co.

362+700 4257(1959)

9736(1977)

30" waterline;

Elevation:

-22.5 feet M.L.T

City of Galveston

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

SECTION 02 41 16.01 45 Page 7

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 SHALL 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 AND PREVIOUS SURVEYS

ARE AVAILABLE IN THE GALVESTON RESIDENT OFFICE.

THE FOLLOWING IS FURNISHED FOR INFORMATION ON VERIFYING PIPELINE OWNERSHIPS:

Lonestar Notification Center 1-713-223-4567 or 1-800-669-8344

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

1.14.2 Survey Reports for Utility Line Crossings

1.14.2.1 Sub-bottom Profile Survey

Prior to commencement of demolition and debris removal operations, the Contractor shall perform sub-bottom profile surveys to locate, by coordinate position, all submerged utility lines crossing the GIWW within the work area limits shown. Surveys shall be taken longitudinally from Sta. 362+200 to Sta. 363+350 and cover the entire width of work area. A minimum of 5 survey lines shall be taken to include:

(1) One (1) survey line along the centerline of GIWW;

(2) Two (2) survey lines along the box cut toes of the existing channel template;

(3) Two (2) survey lines extending 100 feet from the centerline of

GIWW.

1.14.2.2 Magnetometer Survey

Prior to the commencement of demolition and debris removal operations and after sub-bottom profile surveys are performed, the Contractor shall perform a magnetometer survey at each located utility crossing to develop layout alignments and determine the type of material of pipeline(s).

The submitted survey data from sub-bottom profile and magnetometer surveys shall include station locations, coordinate positioning alignments in North American Datum of 1983 (NAD83), and Top of Pipeline (T.O.P) elevations of each utility pipeline crossing (MLT), along with certification from the Contractor that all submerged utility lines have been located.

1.15 NOTIFICATION PRIOR TO COMMENCEMENT OF DEMOLITION AND REMOVAL OPERATIONS

Notify the Contracting Officer, Galveston Resident Office, in writing, at least 10 days prior to commencement of demolition and debris removal operations, and the location or locations at which equipment will be placed on the work. This information is required in addition to the progress charts and schedule provided for in the CONTRACT CLAUSE entitled SCHEDULE

FOR CONSTRUCTION CONTRACTS.

1.16 TEMPORARY REMOVAL OF AIDS TO NAVIGATION

The temporary removal or changes in locations of channel markers may be

SECTION 02 41 16.01 45 Page 8 required to facilitate debris removal and dredging operations in vicinity of GIWW from Sta. 362+300 to Sta. 363+250. Notify the Contracting Officer with written notice at least 21 days prior to the date that the removal or change in location of channel markers will be required so the U.S. Coast Guard can perform the work and so navigation interests may be informed sufficiently in advance of the proposed removal or change in location.

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION

3.1 GENERAL

3.1.1 Underwater Demolition

The demolition items consist of partially removed fender systems and concrete foundations that were part of the old causeway and navigation structures. Surveys taken in March 2014 indicate that some shoaling has occurred since the demolition of old causeway and partial removal of previous fender systems, that may have partially or fully buried the remnants.

3.1.2 Underwater Debris

The underwater debris items consist predominantly of concrete pieces and timber pilings in various sizes; however, the Contractor should expect other types of debris not identified in this Contract.

3.2 REMOVAL REQUIREMENTS

The underwater demolition items and debris items are to be removed as specified below. The Contractor should expect the objects and debris to be buried to some extent with sediment, in which jetting, scouring, or other acceptable method of excavation may be required during the demolition and debris removal process. No demolition and removal work can begin until the APP and DDRP are accepted by the Contracting Officer and a "Before Debris Removal" Multi-Beam Survey is taken, as specified below.

3.2.1 Underwater Demolition and Removal of Timber Piling Fender Remnants

The Contractor shall remove all remnants of the old timber piling fender systems to minus 20 feet MLT, as shown. The Contractor will be required to separate the demolished materials and sediment with the use of a screening device. The Contractor may store the sediment either onsite or offsite during the debris removal operations. The Contractor shall have the separated debris and sediment materials inspected by a USACE representative prior to the start of disposal operations for debris and sediment. The screened sediment shall be backfilled into the excavated holes within the work area limits, once trawling operations and "After Debris Removal" Multi-Beam Surveys have been conducted to verify clearance of the timber piling fender remnants. The backfilled sediment shall not contain any object sizes greater than 4 inches by 4 inches. The Contractor shall not place back the sediment higher than minus 16 feet MLT within the work area limits.

3.2.2 Underwater Demolition and Removal of Concrete Foundation Remnants

The Contractor shall remove all remnants of the old causeway concrete foundations to minus 20 feet MLT, as shown. The Contractor will be

SECTION 02 41 16.01 45 Page 9 required to separate the demolition materials and sediment with use of a screening device. The Contractor may store the sediment either onsite or offsite during the debris removal operations. The Contractor shall have the separated debris and sediment inspected by a USACE representative prior to the start of disposal operations for debris and sediment. The screened sediment shall be backfilled into the excavated holes located within the work area limits, once trawling operations and "After Debris Removal" Multi-Beam Surveys have been conducted to verify clearance of the concrete foundation remnants. The backfilled sediment shall not contain any object sizes greater than 4 inches by 4 inches. The Contractor shall not place back the sediment higher than minus 16 feet MLT within the work area limits.

3.2.3 Removal of Debris and Sediment from 125 Foot Wide Channel Template

The Contractor shall remove all debris from within a 125 foot wide template to minus 20 feet MLT, as shown. The Contractor will be required to separate the debris materials and sediment with the use of a screening device. The Contractor may store the sediment either onsite or offsite during the debris removal operations. The Contractor shall have the separated debris and sediment materials inspected by a USACE representative prior to the start of disposal operations for debris and sediment. Once trawling operations and "After Debris Removal" Multi-Beam Surveys have been conducted to verify clearance of all debris from the specified template, the screened sediment shall be backfilled into the excavated holes located within the work area limits. The backfilled sediment shall not contain any object sizes greater than 4 inches by 4 inches. The Contractor shall not place back the sediment higher than minus 16 feet MLT within the work area limits. Acceptance surveys of debris removal will be allowed in 200 foot increments from Sta. 362+300 to Sta. 363+100. Any concurrent debris removal operations during backfilling of the accepted sections shall be performed a minimum of 100 feet away.

3.2.4 Removal of Debris and Sediment from 8 Target Areas Outside of the 125 Foot Wide Channel Template

The Contractor shall remove all debris from the 8 target areas outside of the 125 foot wide channel template to minus 20 feet MLT, as shown. The Contractor will be required to separate the debris materials and sediment with the use of a screening device. The Contractor may store the sediment either onsite or offsite during the debris removal operations. The Contractor shall have the separated debris and sediment materials inspected by a USACE representative prior to the start of disposal operations for debris and sediment. Once trawling operations and "After Debris Removal" Multi-Beam Surveys have been conducted to verify clearance of all debris from the specified template, the screened sediment shall be backfilled into the excavated holes located within the work area limits. The backfilled sediment shall not contain any object sizes greater than 4 inches by 4 inches. The Contractor shall not place back the sediment higher than minus 16 feet MLT within the work area limits. Acceptance surveys of debris removal will be allowed in 200 foot increments from Sta. 362+300 to Sta.

363+100. Any concurrent debris removal operations during backfilling of the accepted sections shall be performed a minimum of 100 feet away.

3.2.5 Record of Pile Removal

Maintain a record of all the piles removed during the debris removal operations, to include but not limited to, location, embedded depth removed, and estimated total linear feet of timber piling removed. Submit the pile removal report to the Contracting Officer no later than 15 days

SECTION 02 41 16.01 45 Page 10 after Government acceptance of the completed debris removal work. The report shall be signed and certified by the Contractor or subcontractor(s) that performed the piling removal work.

3.2.6 Work Logs

Upon completion of debris removal operations, submit copies of prime and subcontractor work logs and timesheets, including but not limited to, dive, survey, ROV, and mesotech and copies of diver, ROV, and mesotech videos.

3.3 METHOD OF SEDIMENT REMOVAL AND MATERIAL PLACEMENT

The Contractor may perform the sediment removal and backfilling associated with demolition and debris removal work as either hydraulic, mechanical, or a combination of these methods. It shall be the Contractor's responsibility to determine the most cost effective, efficient and safest method to perform this work.

3.4 RESPONSIBILITIES OF THE CONTRACTOR

3.4.1 General

(1) Submit the DDRP no later than 14 calendar days after the Contract Award date. Government review and acceptance of the underwater demolition, debris removal and disposal procedures shall not relieve the Contractor of this responsibility.

(1) The Contractor shall be responsible for planning and execution of the critical lifts, dive operations if necessary, and other aspects of the removal and disposal. Perform the necessary engineering required by the agreement.

(2) Equipment for demolition and debris removal shall be in sufficient quantity, quality, and capacity to safely perform the work. The removal procedures shall provide expedient completion of the work based on a 7-day work week. In addition, the Contractor shall provide written notice to the Contracting Officer at least 14 days prior to the mobilization of the equipment at the worksite.

(3) Determine the methodology and type(s) of equipment to be used for all phases of the removal work. Blasting will not be allowed for this Contract.

(4) Maintain a continuous work schedule on removal activities until the work is completed.

(5) Provide the necessary vessels required to perform the scope of work. The vessels shall be equipped with a mooring system sufficient to anchor the vessels in the environmental conditions in which the vessels may be expected to operate and in the water depth at the site.

Each derrick barge shall maintain an anchor-handling tugboat with it at all times capable of handling the vessel's anchors.

(6) Removal procedures shall delineate actions to be taken if there are rough water or bay conditions during the operation. This shall include contingency planning for tows leaving the removal site.

(7) Retrieve pieces of equipment, structure or debris that fall into the water during the removal operations at the Contractor's expense.

SECTION 02 41 16.01 45 Page 11

The Contractor shall complete the pickup of dropped material within 7 days of completion of removal activities. If dropped material is not removed within 7 days, the Contracting Officer will hire a third party to remove the dropped debris and withhold costs for this work from the Contractor's final payment. If dropped material is in the GIWW, the Contractor shall retrieve this material immediately or at the latest within 24 hours.

(8) If at any time during the removal of a structure the Contractor has to pull away from the facility, the Contractor shall supply and install on the structures temporary navigational aids. The minimum acceptable navigational aids shall be Class "A" U.S. Coast Guard approved lights and horn. The U. S. Coast Guard is responsible for buoys and markers that may be directed or needed in this instance.

(9) The location of work associated with the demolition, debris removal and disposal of material is as shown. The existing pipelines crossings within the work area limits are shown. These pipeline locations were determined from information available at the time of drawing production and are not a complete and accurate representation of the pipelines in the area. The Contractor is required to ultimately determine the locations of pipeline crossing within the work area limits. Anchor patterns shall provide for safe operations and anchors shall be suitably distant from pipeline crossings.

(10) Downtime due to insufficient equipment, failure of Contractor's equipment, lack of spare parts or inadequate tools for servicing shall be at Contractor's expense.

(11) Provide transportation for the Contracting Officer and its party while at the removal and disposal sites.

3.5 VERIFICATION THAT WORK AREAS HAVE BEEN CLEARED

Verify the work areas are cleared to minus 20 feet MLT by trawling and performing multi-beam (acoustic sweep) surveys before and after debris removal of the entire work area limits. At the end of each work period, the Contractor shall conduct hydrographic side scan and single-beam surveys of the GIWW within the work area limits to verify the channel is clear of debris and/or hazards above the authorized depth of minus 12 feet MLT. It will be the Contractor's responsibility to verify and maintain a safe and navigable channel throughout the duration of the underwater demolition and debris removal operations.

3.5.1 Trawling

Trawling activities shall be performed by a licensed independent trawling subcontractor to the Contractor. The Contracting Officer also reserves the right to provide a representative on board during the trawling activities.

Trawling operations shall provide 100 percent bottom coverage of the work area limits. Rubbish and debris encountered during clearing operations shall be completely removed and disposed as specified. The Contractor shall ensure that no debris or other existing structure remains above the required removal depth of minus 20 feet MLT. Evidence of clearance shall be submitted as specified.

3.5.1.1 Survey of Trawled Area

Submit a written survey report to the Contracting Officer no later than 15

SECTION 02 41 16.01 45 Page 12 calendar days after completion of debris removal operations.

At a minimum, the report shall include the following information:

(1) Summary of all trawling activities performed throughout the debris removal operations;

(2) Date(s) the trawling work was performed.

(3) List of all remaining debris found during trawling activities, if any, with follow-up trawling reports verifying the identified remaining debris was removed.

(4) Certification from the trawling subcontractor that verifies all debris has been cleared within the specified work area limits.

3.5.2 Multi-Beam Surveys

Provide multi-beam surveys to the Contracting Officer as specified. The Contracting Officer shall be notified at least 5 days prior to soundings or sweepings so that a USACE representative may accompany the survey party.

3.5.2.1 Survey Equipment and Quality Assurance(QA)/Quality Control(QC)

Equipment applied for multi-beam surveys shall comply with the guidelines stated in EM 1110-2-1003. Surveys shall be taken using a frequency of 400 kHz. Perform QC patch tests and periodic QA performance tests as described in Chapter 6, Section IV of the EM 1110-2-1003. Documentation of tests shall be submitted to the Contracting Officer with overall survey results.

3.5.2.2 Survey Limits

Surveys shall provide 200 percent bottom coverage of the work area limits to ensure debris objects are ensonified from two aspects and to confirm at least three multiple hits are obtained on these objects.

3.5.2.3 "Before Debris Removal" Multi-Beam Survey

"Before Debris Removal" surveys shall be performed within 15 days of commencement of removal work.

3.5.2.4 "After Debris Removal" Multi-Beam Survey

"After Debris Removal" surveys shall be performed after the completion of demolition and debris removal work. Should any shoals, lumps, or other lack of depth be disclosed by this examination, the Contractor shall remove same and repeat surveys to show that work areas are clear.

3.5.2.5 Quantity Computations

Provide volume calculations to the Galveston Resident Office based on comparison of BD and AD multi-beam surveys. These volumes will not serve as the Contract pay volumes and are for informational purposes only.

Volumes shall be provided within 30 calendar days of completion of field surveys if the work area has been cleared to required dimensions.

3.5.2.6 Data Processing

Selected representative "shot", "average" and "minimum" depths shall be

SECTION 02 41 16.01 45 Page 13 derived from the entire edited multi-beam dataset. Extraneous noise and spikes shall be removed from the raw dataset before any other data processing is performed.

(1) Shot depth shall be applied to represent the general condition of the bottom for plotting and graphical purposes. Shot depth shall be defined as the depth reading closest to the center of 1 foot by 1 foot cells.

(2) Average depth shall be applied for volume computations (not for pay purposes). Average depth shall be defined as the average of all depths within 1 foot by 1 foot cells. Volume calculations shall be performed through development of a triangulated irregular network (TIN) as described on page 10-27 of EM 1110-2-1003.

(3) Minimum depth shall be applied to determine acceptance to the required depth as described in Chapter 10, "Dredge Clearance & Acceptance Surveys (Shoal/Strike Detection)" of EM 1110-2-1003.

Minimum depth shall be defined as the "shoalest" depth within a 1 foot by 1 foot cell. Shoals shall be delineated by a minimum of 3 hits over successive passes. A single high spot unsupported by other data will be disregarded.

3.5.2.7 Plots

Provide survey data plots within 10 days of completion of field surveys.

Plots shall consist of surface renderings for visualization of each "Before Debris Removal" and "After Debris Removal" survey. In addition, a surface rendering of each of the 8 target hazard areas and demolition work areas outside of the 125 foot wide channel template shall be printed on separate sheets. A color scheme shall be applied that clearly highlights shoals and/or locations that exceed the required debris removal depth. Plots shall have sufficient scale sizes to show the obstructions in the "Before Debris Removal" survey dataset and clearance of same obstructions in the "After Debris Removal" survey dataset. The Contractor is encouraged to provide preliminary or draft plots for Government review and concurrence, prior to submitting the final multi-beam survey results for acceptance.

3.5.2.8 Acceptance

Submit the "Before Debris Removal" multi-beam survey plots, "After Debris Removal" multi-beam survey plots, and "minimum depth" plots showing no debris above the required removal depth of minus 20 feet MLT, at which time the Contracting Officer will accept the debris removal work as being complete.

3.6 CONDUCT OF DEMOLITION, DEBRIS REMOVAL AND EXCAVATION WORK

3.6.1 Adjacent Property and Structures

No demolition, debris removal and excavation will be permitted within 25 feet of any structure that is not specified to be removed. Damage to private or public property or structures resulting from the removal operations shall be repaired promptly by and at the Contractor's expense.

Damage to structures as a result of Contractor's negligence will result in suspension of operations and require prompt repair at the Contractor's expense as a prerequisite to the resumption of operations. Where demolition and/or debris removal to obtain the required dimensions might endanger a structure, the Contracting Officer, upon request, may reduce the

SECTION 02 41 16.01 45 Page 14 required excavation in the vicinity of this structure.

3.7 SIGNAL LIGHTS

The Contractor shall display signal lights and conduct operations in accordance with the general regulations of the Department of the Army and of the U. S. Coast Guard governing lights and day signals.

3.8 DISPOSAL

3.8.1 Debris Materials

Debris materials to be removed and placed onshore, as specified, shall become the property of the Contractor and shall be transported to approved locations off-site and disposed in accordance with Federal, State, and local requirements. The Contractor should expect to encounter creosote-treated timber piles during removal operations.

3.8.2 Disposal or Storage Area

No disposal or storage site will be furnished by the Government. All non-hazardous waste debris shall be removed from the work site and disposed at an approved offsite C&D landfill determined by the Contractor. The Contractor shall provide the C&D landfill information as part of the DDRP for Government acceptance. If the Contractor plans to dispose or store the debris resulting from the removal operations in an area owned by a third party, the Contractor shall submit written approval by the third party for the use of the area.

3.8.3 Disposition

The Contractor shall not deposit material of any kind or piece on the banks of a navigable water where same may be washed into the navigable water, either by ordinary or by high tides, storms or floods and impede or obstruct navigation, in accordance with 33 U.S.C. 407.

3.8.4 Sale or Salvage

The foregoing shall not preclude the sale of the material that is removed in the salvage operations for delivery to a purchaser at a site not in conflict with the foregoing provisions.

3.9 MISPLACED MATERIAL

If the Contractor, during the progress of the work, loses, dumps, throws overboard, sinks, or misplaces material, plant, machinery, or appliances which in the opinion of the Contracting Officer may be dangerous to or obstruct navigation, the Contractor shall recover and remove the same with the utmost dispatch. The Contractor shall give immediate notice, with description and location of these obstructions, to the Contracting Officer or Inspector and when required, shall mark or buoy these obstructions until same are removed. If the Contractor refuses, neglects, or delays compliance with the above requirements, these obstructions may be removed by the Contracting Officer and the cost of removal shall be recovered by deducting it from the amounts due or to become due to the Contractor. The liability of the Contractor for the removal of a vessel wrecked or sunk without fault or negligence shall be limited to that provided in Sections 15, 19, and 20 of the River and Harbor Act of March 3, 1899 (33 U.S.C. 410 et seq).

SECTION 02 41 16.01 45 Page 15

3.10 MECHANICAL DOWNTIME

The Government will not be charged by the Contractor for time lost or delayed resulting in the Contractor's equipment failure or malfunction, non-operational equipment or for change-out of malfunctioning or non-operational equipment.

3.11 INSPECTION

3.11.1 Compliance Inspection

The presence of the Inspector shall not relieve the Contractor of the responsibility for proper execution of the work as specified and shown.

The Contractor shall be required:

(1) To furnish, on request of the Contracting Officer or an Inspector, the use of boats, boatmen, laborers, and material forming a part of the ordinary and usual equipment and crew of the work plant as may be reasonably necessary to inspect and supervise the work.

(2) To furnish, on request of the Contracting Officer or an Inspector, suitable transportation from all points on shore designated by the Contracting Officer to and from the various pieces of plant.

3.11.2 Inspection

The Contracting Officer has the right to inspect tools, equipment or material used or to be used, in the performance of the work, and may condemn equipment, material or work not conforming to the agreement either before or after work commences.

3.11.3 Deficient Work

Defected work found out of conformance as specified herein will be rejected and corrected at Contractor's expense.

3.11.4 Compliance

If the Contractor refuses, neglects, or delays compliance with these requirements, the specific facilities may be furnished and maintained by the Contracting Officer and the cost thereof will be deducted from amounts due or to become due to the Contractor.

-- End of Section --

SECTION 02 41 16.01 45 Page 16

Naismith Marine Services, Inc.

3765 South Alameda, Suite 205 Corpus Christi, Texas 78411

(361) 945-0248 www.naismithmarine.com

April 11, 2014

Texas Department of Transportation

Side Scan Sonar Contact Report IH-45 Galveston Bridge, Galveston Bay, Texas

Generated on 4/11/2014 12:52:21 PM

Target Image Target Info User Entered Info

● Sonar Time at Target: 4/7/2014 4:13:45 PM

● Click Position

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(X) 3279195.22 (Y) 13677699.93 (Projected

Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

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● Target Height: 1.06 US ft

● Target Length: 2.59 US ft

● Description: debris

● Sonar Time at Target: 4/7/2014 4:26:55 PM

● Click Position

29.2946534764 -94.8866321488 (WGS84)

(X) 3279268.90 (Y) 13677727.02 (Projected

Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

● Target Width: 2.94 US ft

● Target Height: 1.89 US ft

● Target Length: 7.72 US ft http://www.naismithmarine.com/

● Sonar Time at Target: 4/7/2014 2:48:13 PM

● Click Position

29.2948309377 -94.8866841359 (WGS84)

(X) 3279250.07 (Y) 13677790.93 (Projected

Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

● Target Width: 0.86 US ft

● Target Height: 2.91 US ft

● Target Length: 0.97 US ft

● Description: piling or post?

● Sonar Time at Target: 4/7/2014 3:50:36 PM

● Click Position

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(X) 3278872.70 (Y) 13677784.57 (Projected

Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

● Target Width: 1.23 US ft

● Target Height: 1.05 US ft

● Target Length: 3.99 US ft

● Sonar Time at Target: 4/8/2014 8:33:25 AM

● Click Position

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(X) 3279051.72 (Y) 13677830.70 (Projected

Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

● Target Width: 1.01 US ft

● Target Height: 0.87 US ft

● Target Length: 3.03 US ft

● Sonar Time at Target: 4/7/2014 3:38:36 PM

● Click Position

29.2949708086 -94.8876471037 (WGS84)

(X) 3278941.55 (Y) 13677830.96 (Projected

Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

● Target Width: 1.02 US ft

● Target Height: 1.19 US ft

● Target Length: 5.06 US ft

● Sonar Time at Target: 4/8/2014 8:50:13 AM

● Click Position

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(X) 3279257.90 (Y) 13677857.84 (Projected

Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

● Target Width: 3.49 US ft

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● Target Length: 4.07 US ft

● Sonar Time at Target: 4/7/2014 2:51:06 PM

● Click Position

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(X) 3279325.18 (Y) 13677862.73 (Projected

Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

● Target Width: 1.71 US ft

● Target Height: 0.65 US ft

● Target Length: 1.41 US ft

● Sonar Time at Target: 4/7/2014 4:27:22 PM

● Click Position

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(X) 3279311.92 (Y) 13677870.12 (Projected

Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

● Target Width: 1.11 US ft

● Target Height: 0.50 US ft

● Target Length: 1.48 US ft

● Sonar Time at Target: 4/7/2014 4:27:25 PM

● Click Position

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(X) 3279333.25 (Y) 13677874.78 (Projected

Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

● Target Width: 1.90 US ft

● Target Height: 0.50 US ft

● Target Length: 1.99 US ft

● Description: debris or tire

● Sonar Time at Target: 4/7/2014 2:51:12 PM

● Click Position

29.2950734842 -94.8863488905 (WGS84)

(X) 3279353.75 (Y) 13677882.82 (Projected

Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

● Target Width: 1.55 US ft

● Target Height: 0.40 US ft

● Target Length: 1.68 US ft

● Sonar Time at Target: 4/7/2014 4:27:28 PM

● Click Position

29.2950737066 -94.8863714658 (WGS84)

(X) 3279346.56 (Y) 13677882.65 (Projected

Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

● Target Width: 0.99 US ft

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● Target Length: 0.92 US ft

● Description: pile?

● Sonar Time at Target: 4/8/2014 8:31:21 AM

● Click Position

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(X) 3279096.17 (Y) 13677876.40 (Projected

Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

● Target Width: 0.93 US ft

● Target Height: 0.50 US ft

● Target Length: 242.52 US ft

● Description: line or scar

● Sonar Time at Target: 4/7/2014 2:48:00 PM

● Click Position

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(X) 3279224.26 (Y) 13677888.05 (Projected

Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

● Target Width: 1.44 US ft

● Target Height: 0.99 US ft

● Target Length: 2.55 US ft

● Sonar Time at Target: 4/7/2014 4:27:31 PM

● Click Position

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(X) 3279317.49 (Y) 13677913.53 (Projected

Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

● Target Width: 3.96 US ft

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● Target Length: 3.30 US ft

● Description: channel marker?

● Sonar Time at Target: 4/7/2014 3:01:45 PM

● Click Position

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(X) 3279278.83 (Y) 13677917.78 (Projected

Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

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● Target Length: 21.15 US ft

● Sonar Time at Target: 4/8/2014 8:33:56 AM

● Click Position

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Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

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● Target Length: 2.69 US ft

● Sonar Time at Target: 4/8/2014 8:49:56 AM

● Click Position

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(X) 3279317.77 (Y) 13677925.00 (Projected

Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

● Target Width: 2.50 US ft

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● Sonar Time at Target: 4/7/2014 4:27:39 PM

● Click Position

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Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

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● Target Length: 2.99 US ft

● Sonar Time at Target: 4/7/2014 2:58:28 PM

● Click Position

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Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

● Target Width: 0.34 US ft

● Target Height: 7.30 US ft

● Target Length: 15.48 US ft

● Description: pipe?

● Sonar Time at Target: 4/7/2014 4:27:47 PM

● Click Position

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Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

● Target Width: 1.85 US ft

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● Target Length: 1.73 US ft

● Sonar Time at Target: 4/7/2014 4:27:51 PM

● Click Position

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(X) 3279362.75 (Y) 13678013.18 (Projected

Coordinates)

● Map Projection: TX83-SCF

Dimensions and attributes

● Target Width: 17.49 US ft

● Target Height: 1.54 US ft

● Target Length: 24.89 US ft

● Sonar Time at Target: 4/7/2014 3:51:34 PM

● Click Position

29.2954405934 -94.8870612060 (WGS84)

(X) 3279122.17 (Y) 13678008.23 (Projected

Coordinate…