W912ES24B0001-0001 SPEC SECTION 01 71 23.05 13 Replacement 09Jan24.pdf

OHB43B W912ES24B0001

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 71 23.05 13

CONTRACTOR SURVEYS

PART 1 GENERAL

1.1 DEFINITIONS

1.2 REFERENCES

1.3 AVAILABLE DATA FROM THE GOVERNMENT

1.4 SUBMITTALS

1.5 GEOSPATIAL DATA

1.5.1 Metadata

1.5.2 Geospatial Information

1.5.2.1 GNSS/GPS Data

1.5.2.2 Field Notes/Books

1.6 DATUMS AND UNITS OF MEASURE

1.7 MEASUREMENT AND PAYMENT

1.8 QUALITY CONTROL

1.8.1 Quality Control Plan

1.8.2 Layouts and Surveys

1.9 PROFESSIONAL SURVEYOR

1.9.1 Professional Certification and Work Experience

1.10 GEOSPATIAL DATA COLLECTION EQUIPMENT

1.10.1 Positioning Equipment

1.10.2 Hydrographic Survey Equipment

PART 2 PRODUCTS

PART 3 EXECUTION

3.1 COMMENCEMENT, PERFORMANCE, AND COMPLETION

3.1.1 General

3.1.2 Alignment Changes

3.1.3 Geospatial Data Collection

3.1.3.1 Preliminary Surveys

3.1.3.2 Layout Surveys

3.1.3.3 As-Built Surveys

3.1.3.3.1 Project Elements and Features

3.1.3.3.2 Utilities

3.1.3.4 Quantity Surveys for Measurement and Payment

3.1.3.5 Surveys for Verification of Design Section

-- End of Section Table of Contents --

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CONTRACTOR SURVEYS

PART 1 GENERAL

1.1 DEFINITIONS

Construction Surveying: Accurately providing all necessary computations, stakes and marks to establish lines, slopes, elevations, points, and continuous profile grades in accordance with the requirements and tolerances of the project to enable a construction Contractor to perform all required construction work for the project in accordance with the Contract requirements; and so that the Contracting Officer can perform all necessary contract administration duties.

Terrain Model (.DGN): A set of three-dimensional triangles mathematically computed from point data collected on the surface being modeled. Models are used to define irregular surfaces, particularly the surface of the earth.

Geospatial Data: Data or information that identifies the geographic location of features and boundaries on Earth, such as natural or constructed features. Spatial data is usually stored as coordinates and topology, and is data that can be mapped.

Global Navigation Satellite System (GNSS): Refers to a global constellation of satellites providing signal from space transmitting positioning and timing data. This includes GPS, GLONASS, Galileo, Beidou and other regional systems.

Positioning Equipment: Refers to devices that produce (directly or indirectly) geographic coordinates or elevation values as an output. See paragraph POSITIONING EQUIPMENT for examples.

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.

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 1110-1-1003 (2011) Engineering and Design: NAVSTAR Global Positioning System Surveying

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

EM 1110-1-2909 (2012) Engineering and Design: Geospatial Data and Systems

EM 1110-2-1003 (2013) Engineering and Design:

Hydrographic Surveying

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EM 1110-2-6056 (2010) Engineering and Design: Standards and Procedures for Referencing Project Elevation Grades to Nationwide Vertical Datums

1.3 AVAILABLE DATA FROM THE GOVERNMENT

3D design files (.dgn) and terrain models (.dgn) are available upon request. Converting these files to other formats is the Contractor's responsibility.

1.4 SUBMITTALS

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

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

SD-01 Preconstruction Submittals

Construction Surveying Work Plan and Schedule; G, SURV

Information as defined in Paragraph: Layout Surveys.

Quality Control Plan; G, SURV

Information as defined in Paragraph: Quality Control Plan.

Preliminary Survey; G, SURV

Information as defined in paragraph: Preliminary Surveys.

Professional Certification and Work Experience; G, SURV

Information as Defined in paragraph: Professional Certification and Work Experience.

SD-11 Closeout Submittals

As-Built Survey; G,SURV

Information as defined in Paragraph: As-Built Surveys.

Geospatial Data

Information as defined in Paragraph: GEOSPATIAL DATA.

1.5 GEOSPATIAL DATA

1.5.1 Metadata

All geospatial information submitted must include Federal Geographic Data Committee (FGDC) compliant metadata. See EM 1110-1-2909 or http://www.fgdc.gov/metadata/documents/workbook_0501_bmk.pdf for more information.

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1.5.2 Geospatial Information

Geospatial data that may be used include any of the following information:

GIS drawings/maps, hydrographic surveys, topographic mapping, georeferenced digital drawings generated from hard copy maps/drawings, high-order geodetic control (horizontal and vertical) surveys using Global Navigation Satellite System (GNSS) or Global Positioning System (GPS) and conventional survey techniques for control and property/boundary surveys.

For recommended accuracies see EM 1110-1-1005 - Chapter 6 and EM 1110-1-1003 - Chapter 8.

1.5.2.1 GNSS/GPS Data

Collect and submit to the Contracting Officer the GNSS observables (L1/L2) in both the GNSS receiver's native format and the Receiver Independent Exchange Format (RINEX) all Real Time Kinematic, Static, and Differential Surveys. If a Virtual Reference Network (VRS) is not used, a completed observation log sheet is required for each base station occupation/session. All GNSS/GPS control surveys require "closed" observation campaigns. A "closed" campaign consists of more than one observation of each control point. Use appropriate observation times for the level of accuracy required for the type of work.

1.5.2.2 Field Notes/Books

Submit all original field books/notes/computation sheets fully describing the geospatial data collection and all significant events related to said event. This allows the Contracting Officer to apply quality assurance measures to the data collect. Compile the format and content of field notes/books according to EM 1110-1-1005 -Chapter 12.

1.6 DATUMS AND UNITS OF MEASURE

Use the spatial reference information on the drawings. Ensure all geospatial data submitted is referenced to the National Spatial Reference System (NSRS).

1.7 MEASUREMENT AND PAYMENT

No separate payment will be made for the work covered under this section.

Include all costs associated with this section within the contract bid items most closely related to the work.

1.8 QUALITY CONTROL

Establish and maintain quality control for the work of this section to assure compliance with the contract requirements. Maintain records of quality control for all geospatial data collection including but not limited to the following:

1.8.1 Quality Control Plan

Submit a plan for conducting quality control for the work to be performed under this specification. Approval of the QCP by the Contracting Officer is required prior to commencing field work. Outline the personnel, equipment, and activities scheduled by the Contractor or subcontractor(s) to meet contract requirements. Include the expected data formats to be submitted. Determine and use the appropriate procedures and techniques for the required tasks.

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1.8.2 Layouts and Surveys

Keep a daily log of layout work and surveys consisting of type and location using the Government-furnished control system as stated in the

CONTRACT CLAUSE 52.236-17 LAYOUT OF WORK.

1.9 PROFESSIONAL SURVEYOR

All geospatial data collections must be accomplished under the direction of a professional surveyor licensed and registered by the state or states in which the work is done. The professional surveyor must be on site at all times during surveying activities. The professional surveyor must not have additional duties such as Superintendent or CQC System Manager.

1.9.1 Professional Certification and Work Experience

Provide documentation verifying the professional surveyor is licensed and registered by the state or states in which the work is done. Provide documentation verifying that the professional surveyor has a minimum of three years experience performing similar type work. For hydrographic surveys, provide documentation verifying a minimum of three years of experience in hydrographic surveying of navigable channels. Possession of a current hydrographic certification from the American Congress for Surveying and Mapping (ACSM) is acceptable in lieu of the registered Professional Surveyor requirement for hydrographic surveys.

1.10 GEOSPATIAL DATA COLLECTION EQUIPMENT

1.10.1 Positioning Equipment

Positioning equipment for geospatial data collection must be capable of achieving the required accuracy for the work being performed. Perform initial calibration and subsequent checks in accordance with the manufacturer's instructions or the latest guidance documents (see paragraph REFERENCES). Provide documentation of all calibrations and subsequent checks to the Contracting Officer. Positioning equipment includes, but is not limited to, the following: conventional/robotic total stations, GNSS/GPS systems, and digital levels.

1.10.2 Hydrographic Survey Equipment

Perform hydrographic surveys using a sonar equipment (fathometer) system or manual methods. Sonar equipment systems employ positioning equipment (see paragraph POSITIONING EQUIPMENT) to georeference each measurement.

Provide a safe working environment for hydrographic data collection where surveys may be obtained to the level of accuracy required for the project.

PART 2 PRODUCTS

Not used.

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PART 3 EXECUTION

3.1 COMMENCEMENT, PERFORMANCE, AND COMPLETION

3.1.1 General

Execute all surveys in accordance with EM 1110-1-1003 , EM 1110-1-1005 , EM 1110-1-2909 , EM 1110-2-1003 , and EM 1110-2-6056 . Layout the work from the Government furnished horizontal/vertical control points in accordance with CONTRACT CLAUSE 52.236-17 LAYOUT OF WORK. 7 calendar days prior to commencing construction operations, have in place sufficient stakes and markings allowing the Contracting Officer to observe the field layout of the alignment and limits of each feature of work. Stake each feature of work to define area limits such that the Contracting Officer can easily determine, without additional surveys, if alignment and/or limit adjustments need to be made. For embankments, levees, floodwalls, and similar work, define control line, stationing, outermost fill/cut limits, and work limits with staking. For structures and similar work, stake the structure corners and grid lines. Stake general site work to define staging areas, storage areas, and other area limits as directed. The Contracting Officer may waive these requirements for certain areas. The layout must be sufficient for the Contracting Officer to mark trees, vegetation and other features to be left undisturbed. Contracting Officer approval of field layout is required prior to commencement of work.

These stakes must remain or be replaced as needed during all periods of active work. If stakes become damaged or are moved, the Contractor must replace them within 24 hours. The Contracting Officer must have the right to suspend work if the grade stakes are not maintained.

A staff gauge must be provided and placed by the Contractor in the proximity of the work and maintained throughout the duration of the project.

Perform observations of all control points in accordance with the accuracy level appropriate for the type of work being performed. Tie all geospatial data collections to a fixed control point that is published in the National Spatial Reference System (NSRS).

3.1.2 Alignment Changes

The Contracting Officer reserves the right to make changes in the alignment of any feature of work as may be found necessary during the course of the contract. Make no alignment changes or abandonment without prior written approval from the Contracting Officer.

3.1.3 Geospatial Data Collection

The Contracting Officer reserves the right to be present for all geospatial data collection field work.

For preliminary, as-built, quantity surveys and verification of design section surveys perform a breakline and grid style survey/point cloud of the project area at sufficient spacing to accurately define site conditions and as-built conditions but not to exceed 100 feet. Conduct the breakline and grid style survey/point cloud with an equipment type that can meet or exceed the requisite accuracies.

Produce and submit the following for approval: (1) a terrain model in

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Bentley CONNECT .DGN format, LandXML format 1.2, or in a format compatible with Bentley CONNECT approved by the Contracting Officer. The terrain model should include planimetrics, spot elevations, breaklines, voids and contours. (2) XYZ text file with descriptions. (3) Metadata (in an .xml, .gen, or .met file format) associated with submittal. (4) For hydrographic survey data, plot plan view and cross sections of survey lines of each feature overlaid on the project drawing in 11x17 .pdf format.

3.1.3.1 Preliminary Surveys

Run a preliminary survey, locating the control line (if applicable), all other significant features that may affect the design and/or construction of the project within the limits of the work, and all existing conditions from which construction of the design features will be based. Submit all geospatial data (raw and processed) used to derive preliminary survey documentation as evidence of performance and for review by the Contracting Officer for compliance with applicable standards and guidance. At a minimum, collect the preliminary survey using the appropriate data collection equipment (paragraph GEOSPATIAL DATA COLLECTION EQUIPMENT) for the accuracy level required. Deliver all geospatial data according to paragraph GEOSPATIAL DATA.

3.1.3.2 Layout Surveys

Conduct layout surveys for all project features necessary to complete the project as represented in the plans. Perform surveys in a timely manner and that is reflective of the continuing and ongoing nature of construction and inspection activities. This will generally require frequent, separate site visits by the Contractor's survey crew to the project location to accommodate the various stages of construction and inspection activities that will occur.

The Contractor is:

1.responsible for the preservation of all reference points, monuments, government land corners (Public Land Survey System corner monuments), horizontal and vertical control points, stakes, and marks that are established by the Government or others within the project limits. If the Contractor fails to preserve these items and if the Government must reestablish them, the Contracting Officer will deduct a charge from monies due or becoming due the Contactor. All Public Land Survey System corner monuments recovered or reestablished require a record of location be filed with the appropriate authority with a copy sent to the Contracting Officer.

2. responsible to review, balance, adjust, correct, and investigate Government-furnished data and to perform work on survey data and control points that may be necessary to use the survey points and data, all at no extra cost to the Government, unless it is determined by the Contracting Officer that latent errors existed in the information provided by the Government.

3. to start and end all level runs, traverses, or GNSS/GPS control surveys, from known control.

4. to set all stakes and marks in such a manner that is highly visible and notations thereon legible and sufficiently descriptive, unless otherwise agreed to.

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5.to bear all costs, including but not limited to the cost of actual reconstruction of Contract work that may be incurred due to errors in Contractor's Construction Surveying.

6. Surveying Activities:

a. Provide the Contracting Officer a 14 calendar day written notice before the Contractor needs the Government to establish any horizontal and vertical control points shown in the construction documents.

b. Submit for approval, prior to commencing Surveying work, a written Construction Surveying Work Plan and Schedule detailing:

i. Pertinent information as to how the requirements in these specifications are being met by the Contractor.

ii. A project specific Construction Surveying Work Schedule for the Construction Surveying and how it relates to the time frame for construction activities and the Government inspection needs

iii. A proposed method of communications between the Contractor and Government Personnel.

iv. How and when the Contractor will make delivery of the as-built Survey Data to the Contracting Officer.

c. During the course of construction, provide notice of commencement of any Construction Surveying activities.

3.1.3.3 As-Built Surveys

3.1.3.3.1 Project Elements and Features

Conduct an as-built survey of all project elements and features to accurately document the relationship between the design location and construction location and submit within 30 days of the construction completion date as defined in Clause 52.211-10 Commencement, Prosecution, and Completion of Work. Provide all geospatial data (raw and processed) used to derive as-built documentation to the Contracting Officer. Ensure data is in compliance with applicable standards and guidance. At a minimum, electronically collect all as-built surveys of project elements and features using the appropriate data collection equipment (paragraph GEOSPATIAL DATA COLLECTION EQUIPMENT) for the accuracy level required and produce sufficient documentation of the as-built conditions. Deliver all geospatial data according to paragraph GEOSPATIAL DATA.

3.1.3.3.2 Utilities

Conduct an as-built field survey of all utilities, culverts and pipelines after installation or relocation to determine the final locations and elevations of all utility structures such as manholes, catch basins, gate valves, cleanouts, service connections, and other special controls or structures. Final elevations must be determined for all sewer inverts, castings, and other elevations shown in the contract drawings. For utilities that are removed and not replaced, the removal limits and elevations must be surveyed. Show locations using the same convention as the original contract drawings. Include this information on the Contractor Record Drawings in Section 01 78 02.00 10 CLOSEOUT SUBMITTALS.

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3.1.3.4 Quantity Surveys for Measurement and Payment

Perform quantity surveys in accordance with CONTRACT CLAUSE 52.236-16 QUANTITY SURVEYS--ALTERNATE I. Perform quantity surveys for all features of work necessary to establish measurement for partial and final payments. Complete surveys in enough detail to accurately determine quantities and verify the required section. Tasks include, but are not limited to, the following:

1. Initially, perform geospatial data collection prior to initiation of construction of the feature of work according to paragraph Geospatial Data Collection.

2. At time periods at which partial payments are to be requested, perform geospatial data collection according to paragraph Geospatial Data Collection.

3. Provide documentation and all associated files to the Contracting Officer showing all calculations, notes, and determinations. Include cross-sections with quantity calculations for material within the design section and quantity of material outside the design section.

4. For the final payment request, complete a final geospatial data collection according to paragraph Geospatial Data Collection.

The Contracting Officer may use the surveys for tolerance verification purposes. Additionally, the Contracting Officer may authorize an independent verification of any surveys.

3.1.3.5 Surveys for Verification of Design Section

For bid items where the unit of measure for payment is not in units of volume but where the work required is based on achieving specific section requirements, perform surveys as defined in this paragraph to verify that the design section requirements have been satisfactorily achieved.

Perform the surveys using appropriate methods for the verification of the thickness and geometry of the materials placed as required by the contract documents. Tasks include, but are not limited to, the following:

1. Initially, perform geospatial data collection prior to initiation of construction of the feature of work according to paragraph Geospatial Data Collection.

2. At time periods at which verification of design section is requested, perform geospatial data collection according to paragraph Geospatial Data Collection.

3. Provide documentation and all associated files to the Contracting Officer showing all calculations, notes, and determinations. Include cross-sections with quantity calculations for material within the design section and quantity of material outside the design section.

4. Complete a final geospatial data collection according to paragraph Geospatial Data Collection.

The Contracting Officer may use the surveys for tolerance verification purposes. Additionally, the Contracting Officer may authorize an independent verification of any surveys.

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-- End of Section --

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