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FY21 Sediment Removal and Concrete Repairs

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

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SURVEY AND ALIGNMENT CONTROL

PART 1 GENERAL

1.1 SUMMARY

1.2 REFERENCES

1.3 SUBMITTALS

1.4 DIFFERENTIAL GLOBAL POSITIONING SYSTEM (DGPS) EQUIPMENT

1.5 TOPOGRAPHIC SURVEYS

1.6 SURVEY PROCEDURES AND EQUIPMENT

1.7 QUALIFICATIONS

1.8 QUALITY ASSURANCE

PART 2 PRODUCTS (NOT APPLICABLE)

PART 3 EXECUTION

3.1 GENERAL SURVEY REQUIREMENTS

3.1.1 Vertical and Horizontal Datums

3.1.2 Tolerances

3.2 SURVEY CONTROL

3.3 BEFORE CONSTRUCTION AND AFTER CONSTRUCTION SURVEYS

3.3.1 General

3.4 DATA SUBMISSION

3.5 DISCREPANCIES

3.6 METADATA SUBMISSION

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SECTION 01 32 23.00 08 Page 1 Certified Final Documents - RTA W911WN21B8001 - Amendment 1

SECTION 01 32 23.00 08

SURVEY AND ALIGNMENT CONTROL

PART 1 GENERAL

1.1 SUMMARY

This section addresses the overall project survey control and procedure requirements to meet all survey/positional accuracy requirements for this contract.

1.2 REFERENCES

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

GERMAN INSTITUTE FOR STANDARDIZATION (DIN)

DIN 18723 (1990-07) Specification for Theodolite Accuracy

INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO)

ISO 17123-4 (2012) Optics and Optical Instruments - Field Procedures for Testing Geodetic and Surveying Instruments - Part 4:

Electro-Optical Distance Meters (EDM Measurements to Reflectors)

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 1110-1-1003 (2011) NAVSTAR Global Positioning System Surveying

EM 1110-1-1005 (2007) Control and Topographic Surveying

1.3 SUBMITTALS

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

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

NOTE: Any submittals classified as "SD-01 Preconstruction Submittals" require approval prior to mobilization to the contract work site. All other submittals, classified as "SD-02" through "SD-11," require approval prior to commencing the particular task to which the submittal is associated.

SD-01 Preconstruction Submittals

Qualifications; G, DO

Submit qualifications of the independent licensed surveyor(s) for

SECTION 01 32 23.00 08 Page 2 topographic and hydrographic surveying to the Government Survey Point of Contact prior to commencing any survey work.

Survey Procedures and Equipment; G, DO

Submit all surveying procedures, methods, and equipment for topographic surveys to the Government Survey Point of Contact, prior to the start of any surveying work.

A manufacturer's certificate showing serial number and accuracy ratings must be submitted for each total station and/or digital automatic level as a part of the equipment list, along with an active (dated within past 12 months) NIST-traceable Certificate of Calibration. All survey equipment shall be owned or leased by an independent survey company, unless otherwise approved by the Contracting Officer or their designated representative.

SD-07 Certificates

Survey Logs; G, DO

Submit survey logs to the District Survey Point of Contact and Contracting Officer or their designated representative.

Post Pre- excavation Construction Surveys and After Construction Surveys; G, DO ;

Submit after pre- excavation and after construction surveys as required herein, including raw data collector files and all data and plotted drawings as specified herein, within 72 hours after collection of a survey data.

Metadata; G, DO

Submit metadata within 14 business days after completion of survey operations.

1.4 DIFFERENTIAL GLOBAL POSITIONING SYSTEM (DGPS) EQUIPMENT

The Contractor must have at least one Differential/Real-Time/RTK/RTN GPS/GNSS receiver, and shall conduct all GPS/GNSS surveys in accordance with EM 1110-1-1003 . All real-time positioning data submitted must include GPS/GNSS base files (RINEX or Trimble format), GPS/GNSS rover files, base-rover vectors, northing, easting, ellipsoid height, elevation, date and time each record (point) was collected.

1.5 TOPOGRAPHIC SURVEYS

The Contractor shall perform all topographic surveys in accordance with EM 1110-1-1005 , and shall conduct all topographic surveys utilizing RTK/RTN-GPS/GNSS or an "auto-lock" or robotic total station with a data collector that writes digital files. Record a three-dimensional raw electronic position for each data point. Include raw data with submittals.

1.6 SURVEY PROCEDURES AND EQUIPMENT

All total stations used in conjunction with this Contract shall have a valid calibration certificate ("valid" is defined as dated within that

SECTION 01 32 23.00 08 Page 3 past 12 months) from an independent instrument service facility, shall be capable of at least an "auto-lock" function that will automatically turn angles to a stationary tripod-mounted prism (higher performance capabilities such as robotic prism tracking are acceptable), be rated at an angular accuracy ( DIN 18723 ) of 3" (three seconds of arc) or less, and be rated at a distance measurement accuracy ( ISO 17123-4 ) of 2mm+2ppm or less. All GPS/GNSS receivers used in conjunction with this Contract shall be capable of creating data files that can be converted to a RINEX (Receiver INdependent EXchange) format. All automatic/spirit levels used for control, geodetic, or QC purposes in conjunction with this Contract shall be a digital level, meaning that they be capable of writing a digital file of observations that contains rod readings and date & time of observations. All level rods used for control, geodetic, or QC purposes in conjunction with this Contract shall be equipped with a bar code that matches the digital level it is to be used with.

1.7 QUALIFICATIONS

Any and all field surveys shall be performed under the direct physical on-site supervision of a surveyor with a minimum of five years of current and relevant experience, and in accordance with the laws and regulations of the State(s) that the work is performed in.

1.8 QUALITY ASSURANCE

Quality assurance will be conducted by the District Survey Office on a minimum of 10 percent of the Contractor's survey work. To accomplish this, the District survey office will either re-survey areas or observe the Contractor in conducting their surveys or inspect submitted raw and processed data.

PART 2 PRODUCTS (NOT APPLICABLE)

PART 3 EXECUTION

3.1 GENERAL SURVEY REQUIREMENTS

Conduct all surveys required to demonstrate that the construction is in compliance with the specified placement tolerances and the lines, grades, and elevations shown on the drawings.

3.1.1 Vertical and Horizontal Datums

Utilize North American Vertical Datum (NAVD) 1988 as the vertical datum for elevation and depth references for all surveys. Utilize Pennsylvania's State Plane Coordinate System (NAD 1983) as the horizontal reference datum. U.S. Survey Feet shall be used for all vertical and horizontal measurements.

3.1.2 Tolerances

Conduct topographic surveys utilizing procedures and methodology that meet or exceed accuracy tolerances of +/- 0.10 feet in the vertical and +/-

0.10 feet in the horizontal. Take complete notes in areas where obstructions are present, explaining the offset.

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3.2 SURVEY CONTROL

a. Existing horizontal and vertical control to be used for all construction layout is shown on the contract drawings and is on the internet via the USACE Survey Monument Archival & Retrieval Tool (U-SMART) website at http://usmart.usace.army.mil .

b. All new work to be constructed under this Contract shall be constructed based on the survey control established by the Government (Pittsburgh District Geospatial Section) and provided to the Contractor. The Contractor shall verify that control points check within themselves prior to commencing work and utilize U-SMART to report any destroyed/disturbed control. If control points do not check within themselves or have been destroyed/disturbed, submit a request through the Contracting Officer or designated representative for the USACE Pittsburgh District Geospatial Section to re-establish control.

The request shall be made at least 14 calendar days prior to the intended use of the control. The Contractor shall establish any other temporary survey control as may be necessary to carry out the requirements of this Contract. Any and all temporary control set by the Contractor shall be based off the existing control as provided by the Government. Any questions or problems concerning the survey control shall be directed to the Pittsburgh District Geospatial Section through the Contracting Officer or their designated representative.

3.3 BEFORE CONSTRUCTION AND AFTER CONSTRUCTION SURVEYS

3.3.1 General

Take sufficient topography within the site to discern 1 foot contour intervals prior to and after performing any work.

3.4 DATA SUBMISSION

Transfer all raw field survey data digitally onto compact disc (CD) or via DoD SAFE https://safe.apps.mil in a format compatible with Trimble Business Center, Bentley InRoads, or Autodesk Civil 3D.

Submit all survey data in the following formats:

a. Trimble JobXML (.jxl), Trimble Job (.job), or Bentley InRoads- or Autodesk Civil 3D- compatible format that shall contain all raw base/rover or backsight/standpoint/foresight vectors along with calculated coordinates/points/features.

b. Trimble-compatible (.T02, etc) or RINEX format GPS/GNSS data logs for every base or rover used in any Differential/Real-Time/RTK/RTN GPS/GNSS data collection.

c. Raw/unadjusted leveling data in .DAT format from any digital leveling.

d. Plotted and electronic plan view drawings in DXF format with accompanying LandXML that contains the DTM/TIN data. Drawings should show contour lines at a 1 foot interval and all other onsite features/structures. Submit a copy of the plan view drawings in PDF

SECTION 01 32 23.00 08 Page 5 format. Please note that any and all necessary reference files shall be included as DXF or LandXML.

3.5 DISCREPANCIES

In the event of any discrepancies that cannot be resolved by the District Office quality assurance review of the Contractor's data, the Contracting Officer or designated representative may request an additional survey be performed by the Pittsburgh District Survey Section. The results of the Government survey will be considered in the final determination made by the Contracting Officer or their designated representative to resolve any conflicts.

3.6 METADATA SUBMISSION

Provide metadata file(s) for all geospatial data produced under this Contract that are compatible with ESRI ArcGIS applications. (Information on ESRI ArcGIS is available at the following link: http://www.esri.com.)

The metadata file(s) must comply with Federal Geographic Data Committee (FGDC) Content Standards for Digital Geospatial Metadata Version 2.0 or higher. If another metadata generation tool is used, the ".txt" or ".doc" file types will be sufficient, however the ".xml" alternative file type would be preferred.

Geospatial data is defined as information that identifies the geographic location and characteristics of natural or constructed features and boundaries on the earth. Geospatial data affected by these requirements are those generated for use in a:

Geographic Information System (GIS);

Land Information System (LIS);

Remote Sensing or Image processing system;

Computer-Aided Design and Drafting (CADD) system;

Automated Mapping/Facilities Management (AM/FM) system and Other computer systems that employ or reference data using either absolute, relative or assumed coordinates.

Provide digital FGDC compliant metadata file(s) for each deliverable product and data set outlined in these specifications.

Metadata standards can be found at http://www.fgdc.gov/metadata .

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