W912P7-09-B-0005_Amendment 00001.pdf

Port of Redwood City Channel Maintenance Dredging

Technical Specifications San Mateo County, California

DIVISION 1 - GENERAL REQUIREMENTS

TABLE OF CONTENTS

Section 01 11 00 Summary of Work Section 01 32 01 Project Schedule Section 01 32 23 Hydrographic Surveying Section 01 32 30 Silent Inspector Section 01 33 00 Submittal Procedures Section 01 35 26 Safety and Occupational Health Requirements Section 01 45 02 Quality Control System (QCS) Section 01 45 04 Contractor Quality Control Section 01 50 00 Temporary Control Facility Section 01 57 20 Environmental Protection

DIVISION 35 – WATERWAY & MARINE CONSTRUCTION

Section 35 20 23 Dredging Section 35 20 23.13 Scow Silent Inspector Section 35 20 23.23 Hopper Dredge Silent Inspector Section 35 20 25 Transportation for Hamilton Off-loader

APPENDICES

Appendix 01 Coastal Zone Management Act Consistency Determination - O&M

Dredging

Appendix 02 Waste Discharge Requirements – O&M Dredging

Appendix 03 Safety Checklists for Floating Plant and Mobile Construction Equipment Inspection

Appendix 04 Letter of Agreement for Consistency Determination NO.CN 9-06

Appendix 05 Dredge Monitoring System Operational Requirements (DDLS)

Appendix 06 Worker's Compensation Claims

Appendix 07 Dredged Material Disposal Site Log

Appendix 08 Silent Inspector Data Form

Appendix 09 Summary Guide for Completing USACE Contractor Monthly

Appendix 10 Acronym

SECTION 01 32 30

SILENT INSPECTOR

PART 1 GENERAL

1.1 INTRODUCTION

This section described Silent Inspector (SI) procedures and requirements. The Silent Inspector (SI) is the standardized enterprise-wide solution used by the United States Army Corps of Engineers (USACE) to provide dredging quality assurance. The SI uses a Contractor owned and operated data acquisition system to collect and transmit operational parametric dredging and dredged material management information to a centralized USACE owned and operated information management system.

1.2 PAYMENTS

No separate payment will be made for activities associated with the Silent Inspector program.

The Silent Inspector program is an associated subsidiary obligation of the contract line items.

Dredging, transportation and/or placement of dredge material with a data return of less than 75% is unauthorized.

1.3 REFERENCES

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

Department of the Army, U.S. Army Corps of Engineers (USACE)

RGL 06-04 Guidance for the Implementation of the Silent Inspector (SI) for dredging projects requiring Department of the Army (DA) permits.

SI Primer Silent Inspector Primer, A Guide for the Implementation of the Silent Inspector

1.4 SUBMITTALS

Government approval is required for submittals with a "G" designation. Submittals having an “I” designation are for information only. The following shall be submitted in accordance with SUBMITTAL PROCEDURES Section:

SD-01: Preconstruction Submittals

Dredge Plant Instrumentation Plan G 01 32 30-3.2

SD-06: Test Reports

Page 1 of 8 Silent Inspector Section 01 32 30

Calibration Reports I 01 32 30-3.6.2 Data Upload Reports I 01 32 30-3.3

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION

3.1 GENERAL

The Contractor shall provide a functional SI System for each dredge plant and all equipment used on this project. Scows shall be configured to collect record and transmit Tracking, Monitoring and Tons Dry Solids (TDS) profile data.

3.2 DREDGE PLANT INSTRUMENTATION PLAN

The Contractor shall submit a Dredge Plant Instrumentation Plan (DPIP). The DPIP shall provide an explanation of how sensor data will be gathered, perform quality control on those data, calibrate and repair sensors/data reporting equipment when they fail, and distribute the sensor data and computed scow specific data via a standard reporting interface. The Contractor shall maintain a log of sensor problems and repairs. Re-calibration may be directed at any time during contract execution as deemed necessary. No recalibration or adjustments to the calibration controls shall be performed in the absence of the Government or his/her representative without prior written approval. Physical documentation of the calibration procedures and corresponding printed verification data shall be provided for every calibration event.

• Scow Computations and Documentation: All computations for a particular scow concerning deriving computed data elements from sensor data elements will be provided to the Government or his/her representative. For the TDS profile these include the bin volume and scow displacement. The Government will approve any changes to the computing methods (prior to the change being applied) during the dredging contract in writing.

• The Contractor shall provide the Government with dimensioned drawings of the scow.

These drawings should include bin length, depth, and width with required sensors referenced to the overall dimensions. A typical mid-ship bin cross-section should be included with dimensions. The drawings should include overall scow dimensions and show the locations of all sensors needed to supply required data. The drawings shall include bin length, depth, and width with bin level sensors referenced to the overall dimensions. The overall scow dimensions shall also be provided, indicating the locations of each draft sensor(s) with regard to; 1) horizontal and vertical distances from the keel,

2) horizontal and vertical distances between each draft sensor, 3) vertical distances to the bin level sensors, 4) distance of aft draft sensor to aft perpendicular, 5) distance of fore draft sensor to fore perpendicular, 6) distance of the aft draft sensor from the midship section, and 7) distance of the fore draft sensor from the midship section. The Contractor shall also provide in writing as part of the DPIP; how to relate fore and aft ullage sensor measurements to bin volume calculations.

Page 2 of 8 Silent Inspector

• Data Reporting: Contractor proposed additions of non-standard sensor data names not in section 3.4.4 shall be supplied to the Government. An example ASCII format file of data to be exported will be provided at the pre-construction conference or earlier.

• Calibrations: The Contractor will provide certificates of calibration and/or manufacturers certificates of compliance for all needed scow information. These include draft, bin level sensors for the TDS profile.

• Instrumentation Quality Control Methods: Test methods used by the Contractor to provide quality control of input sensor data should be documented. These test methods shall include the checking of sensors to verify that reported values are applicable for that sensor and the particular project being dredged. The ability to report out-of-range sensor values must be demonstrated prior to the commencement of dredging operations.

• Sensor Log: The Contractor shall maintain a log of sensor performance and modifications during the length of the dredging contract. The log shall contain the time when a sensor fails (and subsequently repaired). The log shall also include the time and results of sensor calibrations, the time of sensor replacements, and the time when backup sensor systems are initiated to provide required data. It shall also contain the name of the person responsible for the sensor work. Only sensors that affect the data reported in section 3.4 are affected by this logging requirement. The Contractor may elect to add this log to the quality control report.

• Scow Volume and Displacement: The Contractor will supply the Government with the scow ullage table that lists the bin volume as a function of bin level and a scow draft displacement table listing the scow displacement as a function of draft and vessel trim.

Curves of form that provide this information may also be used subject to approval by the Government. A licensed marine surveyor or architect must certify these tables and curves of form independent of the Contractor. The Contractor should specify the most accurate method for calculating bin volume based on fore and aft bin level and displacement based on fore and aft draft. This method and accompanying documentation should be placed into the DPIP used by the Contractor to report vessel weight.

3.3 DATA UPLOAD REPORTS

The Contractor shall submit Data Upload Reports (DUR) using a common data transmission approach based on e-mail messaging. DURs submittal interval shall be less than or equal to 24 hours. Sensor data for all reportable events shall be submitted via DURs.

These specifications define the format of a Simple Mail Transport Protocol (SMTP) e-mail message and an Internet e-mail address where the message will be sent. The Contractor may select any commercial satellite, cellular phone, or other data communications systems that meet the performance criteria to send the message.

Page 3 of 8 Silent Inspector

The Contractor-supplied systems will only be required to produce the human readable e-mail message with the required data items.

3.4 SENSOR SPECIFICATIONS

The Contractor shall furnish, operate and maintain all hardware and software to meet the following specifications for the Tracking, Monitoring and TDS profiles.

3.4.1 Dredge Scow Senor Specifications

Horizontal Positioning: Horizontal dredging equipment positioning shall be provided in State Plane coordinates based on North American Datum 1983 when possible. Horizontal positioning shall be obtained using either differential Global Positioning System (DGPS) equipment operating with a minimum accuracy level of 1-3 meters horizontal Circular Error Probable (CEP) or with GPS equipment using the Wide Area Augmentation System. This accuracy level requirement is optional for the tracking profile. Differential Correction broadcasts will be furnished 24 hours/day by the Government in standard RTCM SC-104 version 2.0 output. Horizontal positioning shall be recorded to the nearest whole foot when provided in State Plane coordinates. Datum may vary according the local geodetic coordinate system in common use at a USACE District.

Date and Time: The date and time shall be reported to the nearest second in the format shown in these specifications. The time shall be referenced to Coordinated Universal Time (UTC).

Hull Status: Open/closed measurements of hopper status shall be obtained. These data correspond to the split/not-split condition for a scow. An OPEN value refers to when the hull is split or bottom doors open. A CLOSED value refers to when the hull is not split or the bottom doors closed.

Scow Heading: Vessel headings shall be provided using industry standard equipment described in written form and approved by the Government prior to dredging. Calibration will be performed according to manufacturer’s specifications prior to commencement of work and documented in the DPIP. The scow heading should be accurate to within 5 degrees and the Contractor shall report the heading to the nearest whole degree with values from 000 (true north) to 359 degrees referenced to a clockwise positive direction convention.

Scow Course: Vessel course over ground he shall be provided using industry standard equipment described in written form and approved by the Government prior to dredging.

The Contractor shall provide scow course over ground (to the nearest whole degree) with values from 000 (true north) to 359 degrees referenced to a clockwise positive direction convention.

Scow Speed: Vessel speed over ground shall be provided using industry standard equipment described in written form and approved by the Government prior to dredging.

Page 4 of 8 Silent Inspector

Scow Draft: Draft measurements shall be obtained to the nearest 1/10 foot from the scow’s keel. Industry standard pressure sensors or an equivalent system approved by the Government or his/her representative prior to dredging may be used by the Contractor.

The Contractor must provide in writing as part of the DPIP how to relate measured draft values to external draft markings on the scow. The Contractor will verify draft sensor calibration according to manufacturer’s specifications prior to commencement of work and document the calibration in the DPIP. A single draft sensor may be used as part of the monitoring profile. The TDS profile will require two draft sensors one fore and one aft.

Scow Bin Level: Fore and aft bin material level measurements shall be obtained to the nearest 1/10 foot. A minimum of two sensors are required, one fore and one aft. If only two sensors are used, they should be mounted in a location as close as possible over the bin centerline. If more than one fore or one aft sensor is used, then they should be placed near the corners of the hopper and the average value of the fore sensors and the average value of the aft sensors shall be reported. A spare sensor shall be maintained for replacement during dredging. The Contractor will install and calibrate the sensors according to manufacturer’s directions and guidelines.

3.4.2 Pipeline Dredge Sensor Specifications

Slurry Density: The slurry density of the dredge pipeline shall be recorded by a density metering device on the discharge side of the dredge pump(s) approved for use by the Government or his/her representative and calibrated according to the manufacturer's specifications prior to commencement of work and documented in the DPIP.

Slurry Velocity: A flow-metering device approved for use by the Government and calibrated according to the manufacturer’s specifications prior to commencement of work and documented in the DPIP should obtain the slurry velocity in the pipeline. A magnetic flow-metering device calibrated according to manufacturer's specifications prior to commencement of work is the preferred flow-metering device. The slurry velocity shall be obtained using the same pipeline inside diameter as the slurry density measurement.

The slurry velocity should be recorded at the discharge side of the dredge pump(s) near the slurry density measurement.

Horizontal Positioning: Dredging equipment horizontal positioning shall typically be provided in the same State Plane coordinates that was the basis for the pre-dredge survey unless specified otherwise by the Government. Horizontal positioning shall be obtained using differential Global Positioning System (DGPS) equipment operating with a minimum accuracy level of 1-3 meters horizontal Circular Error Probable (CEP).

Differential Correction broadcasts will be furnished 24 hours/day by the Government in standard RTCM SC-104 version 2.0 output. Horizontal positioning shall be recorded to the nearest whole foot when provided in State Plane coordinates.

Page 5 of 8 Silent Inspector

Vessel Heading: Vessel headings shall be provided using industry standard equipment described in written form and approved by the Government prior to dredging. Calibration will be performed according to manufacturer’s specifications prior to commencement of work and documented in the DPIP. The Contractor shall provide dredge compass heading (to the nearest whole degree) with values from 000 (true north) to 359 degrees referenced to a clockwise positive direction convention.

Tide/River Stage: Tide and river stage data shall be obtained using appropriate equipment to give the water level accurate to the nearest 1/10 foot. Government furnished benchmark location and water level datum information will be provided at the dredging site and given to the Contractor. Above datum (positive) values shall be entered with a positive sign, and below datum values shall be entered with a negative sign.

Date and Time: The date and time shall be reported to the nearest second in the format shown in these specifications. The time shall be referenced to Coordinated Universal Time (UTC).

Cutterhead Depth: The digging depth of the cutterhead (relative to the water surface) shall be obtained with a minimum accuracy of + 1/2 foot with values recorded to the nearest 1/10 foot (consistent with EM 1110-2-103, “Hydrographic Surveying” quality control criteria under Class 1 standards). Various measuring systems may be used to provide cutterhead depth, but the operation and accuracy must be described in detail in written form and included in the DPIP for approval prior to dredging. The Government or his/her representative may require periodic cutterhead depth checks over a calibration point at the project site and the Contractor shall calibrate and/or repair cutterhead depth measurement equipment as necessary. The Government may also require depth checks over a calibration point deeper than the project depth. Cutterhead depth data will be relative to the water surface level without tidal or river stage elevation adjustments.

Dredge production: Dredge production data are based upon the measured slurry velocity and density. Instantaneous production refers to the production at a given time. Integrated production is the production over a given time interval.

3.5 PERFORMANCE REQUIREMENTS

3.5.1 The Contractor shall replace or repair of sensors and other necessary data acquisition equipment needed to supply the required data. Repairs shall be completed within 48 hours after a sensor failure occurs or the Contractor fails to report required data within the specified time window for scow measurements.

3.5.2 System Performance Requirement: Data return shall be greater than or equal to 95 %.

Data return is defined as the total number of records sent divided by the total possible number of records if the system worked normally.

3.5.3 Data Reporting Interface: The Contractor may use any available means to transmit the data to the COE via the Internet in the required mail message format ( See Appendix 8

Page 6 of 8 Silent Inspector for Silent Inspector Data Form). The data may be sent directly from the scow or from a shore based computer.

Data Measurement Interval: All profiles require a history of the time of events and report data as a series of events. Data should be measured frequently enough by the scow system to resolve the events to the accuracy specified in the following table:

Event Description Event Time Resolution Event Position

Resolution An elapsed time of 1 hour since the last event 1 minute

1 minute NA

Scow transition across a map grid cell.

1 second 10%

An elapsed time of 1 hour since the last event 1 minute

1 second NA

When the scow hull is closed, each map grid cell shall have a maximum dimension of 1km square. This event can also be interpreted as when the distance from the last position equals or exceeds 1km. When the scow hull is open the grid cell dimension shall be 10m square and a sampling interval of 6 seconds is typically used. Each event report shall include the event time, position, and the hull open status. The system will have the capability of storing at least 1000 event reports.

3.5.4 Contractor Data Backup: The dredging Contractor shall maintain an archive of the data sent via SMTP for the length of the dredging project. The Contractor shall include a complete archive of project data on PC format CD-R disks with the project close out documentation.

3.6 QUALITY ASSURANCE TESTS

3.6.1 Scow QA Tests

Scow Water Test: The Contractor shall provide up to six water tests for the initial calibration associated with the TDS profile. Each water test will consist of pumping the bin out to its lowest level and then filling the bin to capacity with water. At each of the stages of the test (empty and full state), a time duration of at least two minutes will pass before going to next stage. After the first three water tests, the Government will evaluate the data for accuracy. If the data indicates an unsatisfactory calibration, a re-calibration of the sensors and review of Contractor-supplied displacement and hopper volume may be necessary before completing the final three water tests. During dredging operations, one water test per week shall be conducted.

Page 7 of 8 Silent Inspector

Page 8 of 8 Silent Inspector

Scow Bin Level: The Contractor shall provide a clearly readable steel weighted tape for Government use. The tape measure shall have measurements shown in foot-and-tenths and be capable of measuring the full depth in the scow bin from bin coaming. The weight for this tape will be a 6-inch diameter disk weighing between 2 and 3 pounds.

Scow Position Checks: The Government will periodically check the reported position of scows. Independent position measuring equipment will be used to verify locations.

Sailing points with known locations may also be used to verify position information.

3.6.2 Pipeline Dredge QA Tests

Pipeline Dredge Water Test: The Government will direct the Contractor in performing water tests to help verify slurry velocity and slurry density reporting. A water test consists of pumping water through the pipeline.

Pipeline Dredge Cutterhead Depth: The Government may require periodic calibration checks of the reported cutterhead depth over a calibration point at the project site. The Government may also use direct means such as tape measures, sounding lines, and pressure sensors to directly measure cutterhead depth. The Contractor shall have on the dredge a clearly readable steel tape, chain, or wire graduated in 1 and 1/2 foot increments.

This tape or chain will be capable of measuring the depth below water surface of the cutterhead measuring point with sufficient length to measure 5 feet over the maximum project depth.

-- End of Section --

SECTION 35 20 23.13

SCOW SILENT INSPECTOR

1.1 DESCRIPTION

The work under this contract requires use of the Silent Inspector System to monitor the trip number, the time-position history for the scow, course over ground, speed and the hull status. Instrumentation will also be required to provide the heading, scow draft and displacement. This performance-based specifications section identifies the minimum required output and precision and instrumentation requirements. The requirements may be satisfied using equipment and technical procedures selected by the Contractor.

1.2 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 responsible for review of the submittal for the Government. The following shall be submitted in accordance with Section 01 33 00, “SUBMITTAL PROCEDURES”:

SD-01 Preconstruction Submittals

Dredge Plant Instrumentation Plan; G, SAM-OP-J

SD-07 Certificates

Letter of Silent Inspector Certification; G, OP

1.3 PAYMENT

No separate payment will be made for installation, operation and maintenance of the SI system as specified herein for the duration of the dredging operations; all costs in connection therewith will be considered a subsidiary obligation of the Contractor and covered under the contract unit prices for dredging in the bidding schedule.

1.4 SILENT INSPECTOR CERTIFICATION

The Contractor is required to have a current Silent Inspector Certification for the scow instrumentation system to be used under this contract not later than ten working days after issuance of the Notice to Proceed. Certification shall be based

Section 35 20 23.13 on an on-site scow inspection conducted by Silent Inspector Support Center personnel.

An Inspection Shall Include:

• A series of data quality checks as described in paragraph 3.4 “Compliance Inspection and Quality Assurance Checks”,

• Verification of data acquisition and transfer (Paragraph 3.2),

• Review of the Dredge Plant Instrumentation Plan (DPIP) as described in

Paragraph 1.5.

A Silent Inspector Certification is valid for one year from the date of certification if the system is not turned off, disconnected or removed from the scow. The owner or operator of the scow should contact the SI Support Center at 1-877-840- 8024 on an annual basis to schedule re-inspection, allowing ample time for recertification, and coordinate this with all local authorities. The Contractor shall have personnel, who are familiar with the SI system instrumentation and who have the ability to recalibrate the sensors, on site during the inspection. Re-inspection is required for any changes in sensor type or location; these changes will be reported in the sensor log section of the DPIP.

1.5 DREDGE PLANT INSTRUMENTATION PLAN (DPIP)

The Contractor shall have a DPIP on file with the National SI Support Center.

The Contractor shall also maintain a copy of the DPIP on a working dredge on site which is readily accessible to Government personnel at all times. This document shall describe how sensor data will be collected, how quality control on the data will be performed, and how sensors/data reporting equipment will be calibrated and repaired if they fail. A description of computed scow specific data and how the sensor data will be transmitted to the Silent Inspector Database shall also be included. The Contractor shall submit to the SI Support Center any addendum or modifications made to the plan, subsequent to its original submission, prior to Notice to Proceed.

The DPIP shall include the following as a minimum:

(DPIP must have table of content in the following order)

Dredging Company

• Dredge Point of Contact

• Phone Number

Scow Monitoring System Provider

• Scow Monitoring System Point of Contact

• Telephone Number

Scow ID Sensor repair, replacement, installation, modification or calibration methods Data reporting equipment

Procedure for providing sensor data/computed data to SI Database via e-mail

System Power Supply System Battery Charge Method If the system is left in place past the end of the contract, how will the contract number be changed System telemetry Dimensioned Drawings of the Scow

• A typical plan and profile view of the scow showing:

o Locations of required sensors referenced to:

fore and aft perpendicular each other o overall scow dimensions Criteria and method used to increment trip number Description of how the UTC time stamp is collected Positioning system

• brand name and specifications

• sampling rates for data acquisition (standard vs. dump)

• scow heading instrumentation brand name and specifications

• instrument used to calculate COG

• any calculation done external to the instrumentation

• certificates of calibration and/or manufacturer certificates of compliance

• A description of how scow speed is determined

Hull status

• Instrumentation brand name and specifications

• Certificates of calibration and/or manufacturer certificates of compliance

• Any calculation done external to the instrumentation

• Criteria for determining hull open/closed

Drafts:

• instrumentation brand name and specifications

• certificates of calibration and/or manufacturer certificates of compliance

• any calculation done external to the instrumentation

• criteria used to determine draft

Displacement:

• Method used by Contractor to calculate displacement based on fore and aft draft

• Tables listing (fresh and salt water) displacement as a function of draft (ft and tenths of ft) Bin status criteria used to determine open/closed measurements of bin status Contractor Data

• Backup frequency

• Backup method

• post processing

Archive capability Documentation of :

• test methods used by the Contractor to provide quality control of data

• verification that the reported values are applicable for the sensor and application

Log of sensor performance and modifications

Any changes to the computation methods during the contract shall be approved by the Silent Inspector Support Center prior to their implementation.

PART 2 PRODUCTS (Not Applicable)

3.1 REQUIREMENTS FOR REPORTED DATA

The Contractor shall provide, operate and maintain all hardware and software to meet the specifications. The Contractor shall be responsible for replacement, repair and calibration of sensors and other necessary data acquisition equipment needed to supply the required data.

Repairs shall be completed within 48 hours after any sensor failure occurs. Upon completion of a repair, replacement, installation, modification or calibration the Contractor shall notify the Contracting Office’s Representative. The Contracting Office’s Representative may request re-calibration of sensors or other hardware components at any time during contract execution as deemed necessary.

The Contractor shall keep a log of sensor repair, replacement, installation, modification and calibration in the dredge’s onboard copy of the DPIP. The log shall contain a three year history of sensor maintenance to include: the time of sensor failure (and its subsequent repair), the time and results of sensor calibrations, the time of sensor replacements, and the time when backup sensor systems are initiated to provide required data. It shall also contain the name of the person responsible for the sensor work. Only sensors that affect the data reported in paragraph 3.2.6, “Reporting Data Metadata”, are affected by this logging requirement.

3.1.1 Scow Name

Each scow shall be assigned a unique name that will remain constant from one dredge operation to the next.

3.1.2 Trip Number

A trip number shall be reported for each dump run. The trip number will be incremented at the completion of each dump/emptying of the scow. Each scow shall maintain a separate trip numbering sequence – i.e. each scow will start with a trip number of 1, that will be incremented by 1 each time that scow completes a dump.

3.1.3 Horizontal Positioning

Horizontal positioning of the antenna location or center of scow shall be obtained using a Positioning System operating with a minimum accuracy level of 1 to 3 meters horizontal Circular Error Probable (CEP). Positions shall be reported as Latitude/Longitude WGS 84.

3.1.4 Date and Time

The date and time shall be reported to the nearest second and referenced to UTC time based on a 24 hour format.

3.1.5 Hull Status

Open/closed status of the bin, corresponding to the split/non-split condition of a split hull scow shall be monitored. An “OPEN” value shall indicate the hull is split. A “CLOSED” value shall indicate the hull is not split. For non-dump scows, the “OPEN” value shall indicate that the bin is in the process of being unloaded, either by pumping or mechanical means.

3.1.6 Scow Course

Scow course-over-ground shall be provided using industry standard equipment.

The Contractor shall provide scow course over ground (to the nearest whole degree) with values from 000 (true north) to 359 degrees referenced to a clockwise positive direction convention.

3.1.7 Scow Speed

Scow speed-over-ground shall be provided in knots using industry standard equipment with a minimum accuracy of 1.0 knots and resolution to the nearest 0.1 knot.

3.1.8 Scow Heading

Scow heading shall be provided using industry standard equipment. The scow heading shall be accurate to within 5 degrees and reported to the nearest whole degree, with values from 000 (true north) to 359 degrees referenced to a

3.1.9 Scow Draft

Draft measurements shall be in feet with an accuracy of 0.1 foot, and reported with a resolution to the nearest 0.01 foot relative to the fore and aft draft marks.

Each sensor shall be placed at an optimum location on the scow. Industry standard pressure sensors, or an equivalent system, may be used. Two draft sensors, one fore and one aft, will be required. At the discretion of the SI support Center, a system may use other means of measuring drafts if accuracies and resolution are maintained relative to the draft marks.

3.1.10 Scow Displacement

Scow displacement shall be reported in long tons, based on the most accurate method available for the scow. The minimum standard of accuracy for displacement is interpolation from the displacement table, based on the average fore and aft draft readings.

3.2 DATA REPORTING REQUIREMENTS

Contractor collected information shall be transmitted to the SI Database. The parameters which shall be reported to the SI Database include: trip number, date and time, hull status, scow course, scow speed, scow heading, scow draft and displacement.

3.2.1 Data Reporting Interface

The Contractor may select any commercial satellite, cellular phone, or other data communications systems available to transmit the data to the SI Database via the Internet in the required mail message format. The data transition process from the scow to the SI database must be automated. The data may be sent from the scow directly to the SI database or to a shore based computer. Data transmitted to the SI Database shall be raw data; any processing of the data conducted shore side shall be done using an automated software or programming routine. A description of this process shall be included in the DPIP.

3.2.2 Data Measurement Frequency

Data shall be logged as a series of events. Each set of measurements (e.g. time, position, etc…) will be considered an event. Data shall be measured with sufficient frequency by the scow system to resolve the events to the accuracy specified in the following table.

Event Type

Scow Status Event Description Event Time Resolution

Event Position Resolution

1 Stationary/loading with hull status

“CLOSED”

An elapsed time of 1 hour since the last event

1 minute NA

2 Moving with hull status “CLOSED”

Distance from the last event position equals or exceeds 0.5 nautical miles

1 second +/- 10 ft

3 Hull status “OPEN” A position must be recorded within 1 second of the hull status going from CLOSED to OPEN – distance from the last event position equals or exceeds 30 feet

1 second +/- 10 ft

The system shall have the capability of storing at least the previous 1000 events.

A time trigger may be used for event types 2 and 3 at the discretion of the SI Support Center, if it can be demonstrated that the data density will be consistent with the above logic.

3.2.3 Data Reporting

The system shall report the event history via Simple Mail Transport Protocol (SMTP) e-mail message to the SI Database Server. For this contract data will be reported on an event basis (Sent as data is collected). All data for an event shall be transmitted to the SI Database no later than 24 hours after the event’s occurrence.

If the scow has a certified system aboard, it shall transmit data continuously to the SI Database from mobilization until the final USACE post-dredging survey has been accepted. If the scow does not have a certified system at the time of issuance of the Notice to Proceed, it shall begin transmitting data at the time it is certified prior to the start of dredging operations, and continue until acceptance of the final dredging survey.

In the event of sensor failure, a manual dump log shall be maintained and submitted on a daily basis, to the Contracting Officer’s Representative.

3.2.4 Mail Message Format

The Simple Mail Transport Protocol, SMTP, (Internet FRC 2821) shall be used to report data to the SI Database. Mail messages shall have the following contents (Internet RFC 2822):

To: sidatatransfer@usace.army.mil From: contractor’s email address Subject: SISDATA Transfer Attachment: SI SDATA html file

Mail message start of body

SISDATA

SI Scow Data Transfer Blank line

Optional additional annotations from the Contractor – all data after the blank line are ignored.

End of message

3.2.5 Mail Attachment File Format

The attached data file shall be a MIME encoded (Internet RFC 2045) Extensible HyperText Markup Language (W3C standard XHTML 1.1) document. Any length of data may be included, but the file attachment size should not exceed six Megabytes. Only the html, table, tr, th, td, h2, h3 and body tags are permissible.

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="eng"> <body> <h2 class = “contract”>contract number</h2> <h3 class = “vessel_name”>scow name</h3> <table class = “SISDATA”> <tr> <th>TRIP_NUMBER</th> <th coord_type = “(LL)”>X_POSITION</th> <th coord_type = “(LL)”>Y_POSITION</th> <th>DATE_TIME</th> <th>HULL_STATUS</th> <th>SCOW_COURSE</th> <th>SCOW_SPEED</th> <th>SCOW_HEADING</th>

<th>SCOW_AVG_DRAFT</th> <th>SCOW_FWD_DRAFT</th> <th>SCOW_AFT_DRAFT</th> <th>SCOW_DISPLACEMENT</th> </tr> <tr> <td>trip number value</td> <td>x position value</td> <td>y position value</td> <td>date time value</td> <td>hull status value</td> <td>scow course value</td> <td>scow speed value</td> <td>scow heading value</td> <td>average draft value</td> <td>fwd draft value</td> <td>aft draft value</td> <td>displacement value</td> </tr> <tr> … repeated for additional data records </tr> </table> </html> </body>

3.2.6 Reporting Data Metadata

Data shall be reported to the SI database using the tags and criteria specified in the following table:

Header Tag Tag Notes vessel_name The name of the scow contract The USACE contract number under which the work is being performed, or the applicable permit number.

TRIP_NUMBER Trip numbers shall start at 1 at the beginning of work for each contract or permit. Trip numbers are incremented at the completion of the disposal/placement part of the scow cycle. Each scow maintains a unique set of trip numbers.

X_POSITION Longitude in decimal degrees. West Longitude values are reported as negative.

Y_POSITION Latitude in decimal degrees. North Latitude values are reported as positive.

Header Tag Tag Notes DATE_TIME mm/dd/yyyy hh:mm:ss defined as UTC time in 24hr format.

HULL_STATUS OPEN or CLOSED are the only permissible values.

SCOW_COURSE The scow course over ground reported from 0 to 359 degrees.

SCOW_SPEED The scow speed measured in knots at the reported time.

SCOW_HEADING The scow heading reported from 0 to 359 degrees.

SCOW_AVG_DRAFT The representative draft of scow below waterline in feet. This is the draft of scow computed from an average reading of the fore and aft sensors at an optimum location.

SCOW_FWD_DRAFT

SCOW_AFT_DRAFT

Draft of scow below waterline in feet relative to forward and aft draft mark locations.

SCOW_DISPLACEMENT Weight of the scow at the time of measurement in long tons as described in DPIP.

3.2.7 Contractor Data Backup

The Contractor shall maintain an archive of all data sent via SMTP to the SI Database. The Contracting Officer’s Representative may request (at no increase in the contract price) that the Contractor provide a copy of these data covering specified time periods. The data shall be provided on PC format USB flash drive, CD-ROM, file transfer protocol (ftp) upload, or other storage medium acceptable to the Contracting Officer’s Representative. At the end of the dredging contract the Contractor is responsible for contacting the national SI Support Center prior to discarding the data to ensure all data have been appropriately archived. The person who made the call, the date of the call, and the representative who gave permission to discard the data should be recorded in a separate section at the end of the Contractor’s copy of the DPIP.

3.2.8 Data Reporting Example

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="eng"> <body> <h2 class = “contract”>DACW01-03-C-0011</h2> <h3 class = “vessel_name”>COE Scow 3</h3> <table class = “SISDATA”> <tr> <th>TRIP_NUMBER</th> <th coord_type = “LL“>X_POSITION </th> <th coord_type = “LL“>Y_POSITION </th> <th>DATE_TIME</th> <th>HULL_STATUS</th> <th>SCOW_COURSE</th>

<th>SCOW_SPEED</th> <th>SCOW_HEADING</th> <th>SCOW_AVG_DRAFT</th> <th>SCOW_FWD_DRAFT</th> <th>SCOW_AFT_DRAFT</th> <th>SCOW_DISPLACEMENT</th> </tr> <tr> <td>2</td> <td>-82.479309 </td> <td>28.073948 </td> <td>04/11/2002 13:11:55</td> <td>OPEN</td> <td>3.2</td> <td>312</td> <td>313</td> <td>5.72</td> <td>5.53</td> <td>5.91</td> <td>2560.4</td> </tr> <tr> <td>3</td> <td>-82.479319 </td> <td>28.073968 </td> <td>04/11/2002 13:12:05</td> <td>CLOSED</td> <td>3.2</td> <td>311</td> <td>312</td> <td>5.45</td> <td>5.0</td> <td>5.91</td> <td>2560.4</td> </tr> </table> </body> </html>

3.3 PERFORMANCE REQUIREMENTS

The Contractor’s Silent Inspector system shall be fully operational at the start of dredging operations. To meet contract requirements for operability, the Contractor’s system shall provide a minimum 95 percent data return and be 95 percent compliant with DPIP requirements. Data return percentage is defined as the total number of quality records sent, divided by the total possible number of records that could be sent by a system in good working order. Quality data strings are considered to be those providing accurate values for at least 10 of the 11 data parameters reported. DPIP compliance is determined by percent of items listed in Paragraph 1.5 to be at minimum compliance. After fifty percent project completion, combined percentage of data return and DPIP compliance should equal 95 percent or greater. If repairs necessary to restore 95 percent data return are not made within 48 hours, or if the Contractor fails to report required data within the specified time window for scow measurements (see paragraph 3.2.2 “Data Measurement Frequency” and 3.2.3 “Data Reporting”); the system will be declared not fully operational, and the Contracting Officer may, at no additional cost to the Government, suspend all Contractor dredging operations until the system is deemed operational by the Contracting Officer.

3.4 COMPLIANCE INSPECTION AND QUALITY ASSURANCE CHECKS

The Contractor shall submit a test data package to the SI Database from the system on each scow and have it accepted by the SI Support Center prior to scow compliance inspection.

Quality assurance checks are required prior to the commencement of dredging, and at the discretion of a Contracting Officer’s Representative, periodically throughout the duration of the contract. As part of the testing requirements, the Contractor shall provide the Contracting Officer’s Representative a visual display of measurements from the scow monitoring system in the same units that are submitted to the SI database. These measurements shall be provided in real-time on the scow or near real-time on location. The Contractor shall also submit data collected during the inspection from the scow monitoring system to the SI database at completion of inspection.

3.4.1 Position Check

During certification inspections, both the static position of the scow and a track of movement to and from the dump area will be monitored by an independent GPS unit and compared to the SI collected data. A contractor furnished tug will be required to transport the scow during this check, which will monitor time position of the scow, and verify that data collection intervals change as the scow enters and leaves the disposal area. Throughout the contract, the Contracting Officer’s Representative will periodically verify reported positions by independently measuring with other equipment to verify locations.

3.4.2 Hull Status Check

The Contracting Officer’s Representative will document the angle at which the hull status sensor registers “OPEN” and “CLOSED”.

3.4.3 Draft Sensor Check

Draft sensors will be checked by comparing the draft measurements reported by the monitoring system, with the draft measurements from the scows draft marks.

Drafts will be checked light, loaded, and for other intervals at the inspector’s discretion.

3.5 LIST OF ITEMS TO BE PROVIDED BY THE CONTRACTOR

DPIP Sec 1.5 Dredge Plant Instrumentation Plan

SI SYSTEM

Sensor Instrumentation Sec. 3.1 Specifications for Reported Data

SCOW DATA

Event documentation Sec. 3.2.2 Data Measurement Frequency Data reports Sec. 3.2.3 Data Reporting

SECTION 35 20 23.23

HOPPER DREDGE SILENT INSPECTOR

1.1 DESCRIPTION

The work under this contract requires use of the Silent Inspector (SI) System to monitor the dredge’s status at all times during the contract, and to track trip number, time-position history, instrument readings, vessel state, compute tons dry solids, report data, and manage data history. This performance-based specification section identifies the minimum required output and precision and instrumentation requirements. The requirements may be satisfied using equipment and technical procedures selected by the Contractor.

1.2 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 responsible for review of the submittal for the Government. The following shall be submitted in accordance with Section 01 33 00, “SUBMITTAL PROCEDURES”:

SD-01, Preconstruction Submittals

Dredge Plant Instrumentation Plan; G, SAM-OP-J

SD-07 Certificates

Letter of Silent Inspector Certification; G, OP

1.3 PAYMENT

No separate payment will be made for installation, operation and maintenance of the SI system as specified herein for the duration of the dredging operations; all costs in connection therewith will be considered a subsidiary obligation of the Contractor and covered under the contract unit prices for dredging in the bidding schedule.

1.4 SILENT INSPECTOR CERTIFICATION

The Contractor is required to have a current Silent Inspector Certification for the dredge instrumentation system to be used under this contract at the time of

Section 35 20 23.23 issuance of the Notice to Proceed. Certification shall be based on an on-site dredge inspection conducted by Silent Inspector Support Center personnel.

The inspection shall include:

• A series of data quality checks as described in paragraph 3.5 “Compliance Inspection and Quality Assurance Checks”,

• Verification of data acquisition and transfer (Paragraph 3.2).

• Review of the Dredge Plant Instrumentation Plan (DPIP) as described in

Paragraph 1.5.

A Silent Inspector Certification is valid for one year from the date of certification.

The owner or operator of the dredge shall contact the SI Support Center at 1-877- 840-8024 on an annual basis to schedule re-inspection, allowing ample time for re-certification, and coordinate this with all local authorities. The Contractor shall have personnel, who are familiar with the SI system instrumentation and have the expertise to recalibrate sensors, on site during the inspection. Re-inspection is required for any yard work which produces modification to displacement (e.g.

change in vessel lines, repositioning or repainting hull marks), modification to hopper volume (change in hopper dimensions or addition or subtraction of structure) or changes in sensor type or location. These changes will be reported in the sensor log section of the DPIP. If the SI system has been disabled or turned off, re-calibration of all sensors and concurrent re-certification will be required.

This is not to be construed that data must be continually transmitted if the dredge is between jobs or engaged in a non-government project which does not require certification.

1.5 DREDGE PLANT INSTRUMENTATION PLAN (DPIP)

The Contractor shall have a DPIP on file with the National SI Support Center.

This document shall describe how sensor data will be collected, how quality control on the data will be performed, and how sensors/data reporting equipment will be calibrated and repaired if they fail. A description of computed dredge specific data and how the sensor data will be transmitted to the Silent Inspector Database shall also be included. The Contractor shall submit to the SI support Center any addendum or modifications made to the plan subsequent to its original submission, prior to Notice to Proceed. The Contractor shall also maintain a copy of the DPIP on the dredge which is readily accessible to Government personnel at all times.

The DPIP shall include the following as a minimum:

(DPIP must have table of contents in the following order)

Dredging Company

• Dredge Point of Contact

• Phone Number

Dredge Monitoring System Provider

• Dredge Monitoring System Point of Contact

• Telephone Number

Dredge Name Sensor data collection method

• Any averaging

• Route from sensor to SI computer

SI Computer Hardware & Components

• Brand names and specifications

• User guides and owner manuals

Sensor repair, replacement, installation, modification or calibration methods

Dimensioned Drawings of the Dredge

• A typical plan and profile view of the dredge showing:

o Hopper cross section o Locations of required sensors referenced to:

Fore and aft perpendicular Hopper length, depth, width, zero reference External hull draft markings (latitudinal, longitudinal, keel) Each other o Overall dredge dimensions o Dimensions of draghead

Length Pipe inside diameter at sensor locations Offset to positioning system antenna

Criteria and method used to increment load number Description of how the UTC date/time stamp is collected Positioning system

• Brand name and specifications

• Dredge heading instrumentation brand name and specifications

• Instrument used to calculate COG

• Any calculation done external to the instrumentation

• Certificates of calibration and/or manufacturer certificates of compliance

• Description of how dredge speed is determined

Tide

• Description of how tidal information is entered into the data string.

Hull status

• Instrumentation brand name and specifications

• Certificates of calibration and/or manufacturer certificates of compliance

• Any calculation done external to the instrumentation

Drafts:

• Instrumentation brand name and specifications

• Certificates of calibration and/or manufacturer certificates of compliance

• Any calculation done external to the instrumentation

Displacement:

• Method used by Contractor to calculate displacement based on fore and aft draft

• Method used by Contractor to calculate lightship displacement

• Hydrostatic curves

• Tables listing (fresh and salt water) displacement as a function of draft certified by a licensed marine surveyor/ naval architect independent of the Contractor (feet and tenths of feet) o These methods and tables shall be an accurate reflection of the current configuration and displacement

Hopper Ullage:

• Sensor brand name and specifications

• Certificates of calibration and/or manufacturer certificates of compliance

• Any calculation done external to the instrumentation

Hopper Volume:

• Method used by Contractor to calculate hopper volume based on fore and aft hopper ullage

•…