Technical Exhibit A - Revised Specifications.pdf

Solicitation No. W91151-22-B-00XX TECHNICAL

EXHIBIT A SPECIFICATIONS

Headquarter III Corps, Fort Hood

Directorate of Public Works (DPW)

Technical Exhibit “A” Open End Paving Contract

SPECIFICATIONS

Contract No. W91151‐22‐X‐XXXX

Directorate of Public Works Engineering Division

US Army, III Corps 4612 Engineer Dr. Fort Hood, TX 76544

OEPS ‐ 23

TABLE OF CONTENTS

i

Series 000 (General Requirements)

Section Page Subject

001 ( 1 ) Performance Bond

002 ( 2 ) As-Built Drawings

003 ( 8 ) Miscellaneous Project Elements

004 ( 10 ) Surveying

Series 100 (Earth Work and Landscape)

101 ( 22 ) Saw Cutting

102 ( 24 ) Removal of Flexible Pavements

103 ( 26 ) Removal of Reinforced Concrete

104 ( 28 ) Rubbish Handling (Dumpster & Rental)

105 ( 30 ) Remove Pipe Culvert

106 ( 32 ) Cold Milling of Asphaltic Concrete

107 ( 35 ) Clear & Grubbing

108 ( 38 ) Embankment Material (Imported from Off-Site, Compacted)

109 ( 45 ) Excavation (Exported to On-Post Borrow)

110 ( 52 ) Cut & Fill (Stays On-Site, Compacted)

111 ( 61 ) Landscape Aggregate

112 ( 62 ) Geotextile Material

113 ( 66 ) Plant Native 2” Texas Tree

114 ( 68 ) Top Soil with Seeding

115 ( 83 ) Erosion Control

116 ( 86 ) Herbicide

117 ( 88 ) Top Soil with Sodding

Series 200 (Subgrade Treatments and Base)

201 ( 94 ) Reprocess Existing Base (Plow/ Re-compact)

202 ( 100 ) Subgrade Preparation

203 ( 104 ) Lime Stabilization (Stabilize In-Place Material)

204 ( 114 ) Washed Sand (Utility Bedding)

205 ( 115 ) Flexible Base Material (In-Place, Compacted)

206 ( 121 ) Proof Rolling ii

Series 300 (Surface Courses and Pavement)

301 ( 125 ) Bituminous Prime and/or Tack Coat

302 ( 129 ) Hot-Mix Asphaltic Concrete

303 ( 158 ) Asphalt Stabilized Base

304 ( 180 ) Double Bituminous Surface Treatment

305 ( 186 ) Emulsified Asphalt Base Treatment

306 ( 189 ) Seal Coat (Jennite A.E. - 2 Coats)

307 ( 193 ) Microsurfacing

308 ( 203 ) Fog Seal

309 ( 205 ) IRI Ride Quality Testing

310 ( 211 ) Pulverization (Full Depth Reclamation)

Series 400 (Structures)

401 ( 215 ) Rip Rap Rock (Installed)

402 ( 217 ) Grouted Rip Rap (Installed)

403 ( 221 ) Wheel Stop Removal and/or Replacement

404 ( 223 ) Corrugated Metal Pipe Culverts (Installed)

405 ( 227 ) Reinforced Concrete Pipe (Installed)

406 ( 233 ) French Drains (Installed)

407 ( 235 ) Safety End Treatments (Installed)

408 ( 237 ) Valve Box Adjusted to Grade

409 ( 239 ) Manhole Adjusted to Grade

410 ( 241 ) Structural Steel Fabrication

411 ( 248 ) Detectable Warning Paver

412 ( 250 ) Portable Concrete Traffic Barrier

413 ( 253 ) Metal Beam Guard Fence (Installed)

Series 500 (Rigid Pavement)

501 ( 259 ) Miscellaneous Concrete

502 ( 266 ) Concrete Retaining Wall

503 ( 273 ) Concrete Curb & Gutter

504 ( 283 ) Concrete Sidewalk

505 ( 293 ) Concrete Headwall

506 ( 300 ) Concrete Box Inlet/Manhole

507 ( 307 ) High Strength Epoxy Concrete Patching

508 ( 311 ) Concrete Pavement (Roadways & Motorpool)

509 ( 344 ) Reinforcement for Concrete Pavement iii

510 ( 347 ) Roller-Compacted Concrete Paving

Series 600 (Signing, Markings and Signal Equipment)

601 ( 363 ) Permanent Signs (Installed)

602 ( 367 ) Delineators (Installed)

603 ( 369 ) Pavement Marking Surface Preparation and Removal

604 ( 372 ) Pavement Striping & Marking (Installed)

605 ( 379 ) Temporary Flexible Roadway Marker Tabs

606 ( 381 ) Raised Reflective Markers on Concrete (Installed)

607 ( 385 ) Raised Reflective Markers on Asphaltic (Installed)

608 ( 388 ) Portable Changeable Message Sign

Series 700 (Maintenance)

701 ( 391 ) Pothole Repair

702 ( 393 ) Crack Seal (Cold Applied) Plyolastic (For Seal Coating)

703 ( 396 ) Crack Seal (Hot Applied)In Bituminous Pavement

704 ( 399 ) Resealing of Joints in Rigid Pavement

SECTION 001

SECTION 001

PERFORMANCE BOND

(LINE ITEMS: 001)

1. DESCRIPTION

A performance bond is a surety bond issued by an insurance company or band to guarantee satisfactory completion of a project by a Contractor. Refer to Division 1 for greater detail, specifically in Section 01 33 00, SUBMITTAL PROCEDURES.

2. MATERIALS (NOT SPECIFIED)

3. EQUIPMENT (NOT SPECIFIED)

4. CONSTRUCTION OR WORK METHODS (NOT SPECIFIED)

5. MEASUREMENT

The unit of measure for the performance bond will be Lump Sum (LS).

6. PAYMENT

Refer to the Measurement Section above.

--- END OF SECTION ---

SECTION 002

AS-BUILT DRAWINGS

(LINE ITEMS: 002)

1. DESCRIPTION

This item shall govern for the preparation and submittal of As-Built (Record) Drawings.

This Section covers the following line items:

002: As-Built Drawings

2. MATERIALS (NOT SPECIFIED)

3. EQUIPMENT (NOT SPECIFIED)

4. CONSTRUCTION OR WORK METHODS

Drafting: Only personnel proficient in the preparation of engineering drawings shall be employed to prepare contract drawings and additional new drawings. All additions and corrections to the contract drawings shall be neat, clean, and legible and shall match the adjacent existing line work and/or lettering being annotated in type, density, size, and style. All drawings, modifications and new drawings shall conform to applicable requirements of the Fort Hood DPW CADD General Design and Survey Guidelines available from the DPW CADD Department. The Contracting Officer’s Representative will review all record drawings for accuracy and conformance to the above specified drafting and standards.

The Contractor will make all corrections, changes, additions, and deletions required to meet these standards.

Record Drawings As-Built Drawings: Record drawings As-Built Drawings shall be a record of the construction as installed and completed by the Contractor. They include all the information reflected on the task order scope of work and a record of all deviations, modifications, or changes from the scopes of work, however minor, which were incorporated in the work; all additional work not reflected in the scope of work;

and all changes which are made after final inspection of the delivery order work. The location and size of all uncharted existing utilities encountered, shall be included when specifically requested by the COR.

In event the Contractor accomplishes additional work which changes the as-built conditions of the work after submission of the record drawings As-Built Drawings, the Contractor shall furnish revised and/or additional drawings and CADD files as required to depict as-built conditions. The requirements for these additional drawings will be the same as for the record drawings As-Built Drawings included in the original submission. CADD files shall conform to the CADD requirements of the Fort Hood DPW CADD Department General Design and Survey Guidelines and shall be demonstrated to work on designated Government computer systems. CADD files shall be error and virus free.

Submittal of Working Drawings: An electronic copy of the working drawings produced from the task order scope of work, will be furnished to the Contractor in Fort Hood’s current Bentley MicroStation CADD Software’s (MicroStation DGN or AutoCAD Civil 3D DWG) format prior to start of work on each task order. The working drawings will be generated from the Fort Hood CADD System. The working drawings shall be in enough detail to show the extent of the work required by the project and shall show the following information, but not be limited thereto:

The location, offset, depth and description of any utility lines or other installation of any kind or description known to exist within the construction area. The location of known exterior utilities shall be shown by actual measured horizontal distances from utilities to permanent facilities or features. These measurements shown at sufficient points to permit easy location of utilities for future maintenance purposes. Measurements shall be shown for all change of direction points and all surface or underground components such as valves, manholes, drop inlets, cleanouts, meter, etc. The general depth range of each underground utility line shall be indicated. The description of exterior utilities includes the actual quantity, size, and material of utility lines.

Proposed grade or alignment of roads, structures or utilities.

Proposed elevations to the nearest tenth of a foot using a working bench mark and the bench mark’s location as a basis.

The topography and grades of all drainage features to be installed or affected as a part of the project construction.

Refer to “Preliminary As-Built Drawings” for additional examples.

Preliminary Record Drawings As-Built Drawings: For each task order, the Contractor shall, within 30 days after the final acceptance inspection, produce from the working drawings one two sets of blue line or black line prints to show all requirements of the scope of work, all changes from the scope of work which are made in the work or additional information which might be uncovered in the course of construction, including uncharted utilities, shall be accurately and neatly recorded as they occur by means of details and notes. The title block and border sheet format to be used for any record drawings As-Built Drawings shall be as provided by the Government. All changes and/or required additions to the preliminary record drawings As-Built Drawings shall be clearly identified in a color contrasting to the blue or black line drawings and which is compatible with reproduction of the preliminary record drawing in Blue or black line prints Drawings full size, 22" by 34" image on 11” 24" by 17” 36" ANSI B D sheet. Drawings shall be produced at a scale acceptable to the Contracting Officer. All blue or black line drawings shall exhibit good readable print with clear, sharp, dark lines, and shall not be smeared, faded, double imaged, or have torn or ragged edges. The blue or black line drawings will be jointly inspected for accuracy and completeness by the Contracting Officer's representative and the assigned representative of the Contractor's Quality Control Organization prior to submission. If upon review, the drawings are found to contain errors and/or omissions, they will be returned to the Contractor for corrections.

The record drawings As-Built Drawings shall show the following information, but not be limited thereto:

The location, offset, depth and description of any utility lines or other installation of any kind or description known to or found to exist within the construction area. The location of exterior utilities includes actual measured horizontal distances from utilities to permanent facilities/ features. These measurements shall be shown at sufficient points to permit easy location of utilities for future maintenance purposes. Measurements shall be shown for all change of direction points and all surface or underground components such as valves, manholes, drop inlets, cleanouts, meter, etc. The general depth range of each underground utility line shall be indicated.

The description of exterior utilities including the actual quantity, size, and material of utility lines.

Correct grade or alignment of roads, structures or utilities if any changes were made from delivery order working drawings. Correct elevations if changes were made in site grading.

Changes in details of design or additional information obtained from working drawings prepared by the Contractor including but not limited to fabrication, erection, installation plans and placing details, pipe sizes, insulation material, dimensions of equipment foundations, etc.

The topography and grades of all drainage installed or affected as a part of the project construction.

Final Record Drawings As-Built Drawings Revisions:

Upon approval of the preliminary record drawings As-Built Drawings, the Contractor will modify the original drawings as may be necessary to correctly show all the features of the project as it was constructed by bringing the contract set into agreement with the preliminary record drawings As-Built Drawings, including adding additional drawings as may be necessary.

Title Block Additions: When final revisions have been completed, place the words "REVISED AS-BUILT DRAWING," in letters at least 3/16 inch high, and the date of completion in the revision block above the latest existing revision notation on each drawing CADD file. The Contractor shall include Contract/Task Order #, Project #, Completion Date, version # to Government, if necessary. Also, drawing shall include task order and version # in the file name.

procure from the Government the applicable Drawing Management Index (DMI) numbers and place these numbers in the appropriate block of the title block. Also, drawings shall use the DMI# as the file name.

All changes and/or required additions to the preliminary record drawings As-Built Drawings shall be clearly identified in a color contrasting to the blue or black line drawings and which is compatible with reproduction of the preliminary record drawing in full size, 22" by 34" image on 11” 24" by 17” 36" ANSI B D sheet.

Drawings shall be produced at a scale acceptable to the Contracting Officer. All blue or black line drawings shall exhibit good readable print with clear, sharp, dark lines, and shall not be smeared, faded, or double imaged. The blue or black line drawings will be jointly inspected for accuracy, conformance and completeness to the specified drafting and standards by the Contracting Officer's representative and the assigned representative of the Contractor's Quality Control Organization prior to submission. If upon review, the drawings are found to contain errors and/or omissions, they will be returned to the Contractor for corrections.

Verifying the Accuracy of Measurement and Location of Site Location in reference to the Fort Hood Data Base:

The accuracy of the final record drawing shall be verifiable. There are two types of project site locations that are distinguished by their proximity to permanent facilities. One type of a project site location is in a location that is in eye contact with existing permanent facilities.

The other type of project site location is in a remote area without eye contact with existing permanent facilities. The following procedures shall be engaged such that accuracy of work and verification of site locations are verifiable.

Project Site Locations near Existing Permanent Facilities:

Place a #3 bar, 6-inches in length, painted orange, flush with the ground at the perimeter of the work zone in a location that will not be disturbed. Employing an Electronic

Distance Meter, reference this point by angle and distance to three building corners that are more than 90 degrees apart.

Also, reference from the same reference point a minimum of ten distinct construction elements by distinctive points. A few examples are: north-east corner of headwall, back of curb, start of radius of curb return, center of cleanout, center of manhole, etc.

Project Site Locations in Remote Area not in eye contact with Existing Permanent Facilities: In this situation start at the nearest hard surfaced road that is identifiable on the Fort Hood Data Base. Place two #3 bar, 6-inches in length, painted orange flush with the ground, 100 feet apart at a location that will not be disturbed. At each of these points place cross-ties to aide with relocating the points. Employing an Electronic Distance Meter create a coordinate route to the project site location. At each turn in the coordinate route place a #3 bar painted orange flush with the ground at a location that will not be disturbed. Upon reaching the site location record the angle and distance to a minimum of ten distinct construction elements.

Electronic submittals of the Final Record Drawings As-Built Drawings:

CADD Files: The Contractor shall incorporate all information from the final record drawings As-Built Drawings into CADD files that conform to the CADD requirements of the Fort Hood CADD System and shall be demonstrated to work on the DPW production version of MicroStation CADD Software. CADD files shall be error and virus free. Two (2) copies of CADD files shall be provided on either compact disks (CD) and appropriately labeled. or 3-1/2 inch diskettes.

Failure of the Contractor to make timely delivery of the final record drawings As-Built Drawings on any or all items of work will be cause for the Government to delay substantial completion and to assess liquidated damages in accordance with the terms and conditions of the contract.

5. MEASUREMENT

The unit of measure recording drawings shall be for each (EA) project.

Drawings are to include surveyed information with elevations, angles, and distances, where applicable. Where calculations are required rather than true point measure, surveying calculations should be stamped by a registered surveyor.

6. PAYMENT

Payment shall be at the contract unit price per each (EA) per project for recording drawings.

SECTION 003

MISCELLANEOUS PROJECT ELEMENTS

(LINE ITEMS: 003)

1. DESCRIPTION

This Section covers the following line items:

003: Miscellaneous Project Elements

2. MATERIALS

Materials will be specific to the particular task order. Type of material used and submittals required will be determined and agreed upon before the task order is awarded.

3. EQUIPMENT (NOT SPECIFIED)

4. CONSTRUCTION OR WORK METHODS

When the Government determines that an existing line item does not adequately meet the specifications, intent, and/or pricing of a particular item of work; this Line Item may be used to ensure the Government receives the materials and/or services needed to complete the project. The Government will request the contractor submit a detailed cost estimate and break-out: at a minimum (material, equipment, labor, duration, and overhead and Profit that applies to subcontractors requested work of the requested work to the Contracting Officer. The cost estimate will be reviewed by the Contracting Officer and Project Manager for accuracy. The scope of work and cost will be agreed upon by the Contracting Officer and the Contractor before the task order is awarded.

Examples of the type of work to be performed include but are not limited to the following:

Installing a different hot-mix design

Installing PVC piping in sizes other than the ones specified

Installing a specific size culvert or French drain other than the sizes specified.

The unit of measure for Miscellaneous Project Elements shall be by Lump Sum (LS), or percentage thereof, identified on the corresponding task order that is completed and accepted by the Contracting Officer.

The payment will be at the contract unit price.

SECTION 004

SURVEYING

(LINE ITEMS: 004.1, 004.2)

(a) This work consists of performing surveying services, such as, c o n s t r u c t i o n staking, calculating, c o n s t r u c t i o n p e r m a n e n t b e n c h m a r k s and recording data for the control of work, surveying existing conditions and performing as-built surveys.

See FAR Clause 52.236-16 Quantity Surveys (Alternate I) and 52.236-17 Layout of Work. Line items used to perform surveying tasks are set forth as the following:

004.1: Level 1 Survey: Permanent Benchmarks, Roadway

Project Control, Realignment, & Boundary work (Property

Corners).

004.2: Level 2 Survey: Existing conditions, As-built’s and Construction Staking.

2. QUALIFICATIONS

(a) Conform to the following:

a. Provide a c o m p e t e n t crew supervisor/crew chief on the project whenever surveying and construction staking are in progress.

b. Provide technically qualified survey crews experienced in roadway and site construction surveying, as-built surveying, benchmark surveying and surveying of existing conditions and control surveying. Provide personnel capable of performing in a timely and accurate manner.

c. Supervision by registered, professional land surveyor (RPLS) ONLY where (Level 1) survey control establishment is required OR design adjustments regarding horizontal and vertical roadway realignment occur (Level 1 Survey) OR where boundary work is required. Supervision by an RPLS for survey work completed under the Level 1 line item may be submitted via a stamped, signed and dated field record book, report or drawing.

Realignment is defined as the significant change in horizontal curve geometry beyond minor widening of roadways and a significant change in vertical geometry beyond minor elevation changes due to surface courses. All other surveying tasks are to be paid for under line item 004.2, Level 2 Survey.

3. EQUIPMENT

(a) Furnish survey instruments and supporting equipment capable of achieving the specified tolerances: (Refer to Table 004-1 – located just before end of section 004). It is at the discretion of the COR what equipment and methods shall be used on a per job basis. E.G. , GPS may or not be suitable at times and the use of a total station may be required. . It is required that the contractor be well versed in the capabilities and limitations of their survey equipment (proper training). Contractor shall be held liable for errors resulting from misunderstanding of capabilities and limitations of survey equipment, such as but not limited to GPS multi-pathing and magnetic interference, range limitations, overhead obstructions that may interfere with GPS signal (sky visibility), balancing of backsight and foresight distances, and impact of temperature fluctuation on equipment.

a. Surveying Equipment

• The Contractor shall furnish and use GPS enabled RTK base stations and rovers for all Level 2 surveys, or an approved alternate on a case by case basis.

• Contractor must have access to a National/Cooperative CORS network E.g. Allterra RTK Network. may be used to establish a primary control point (Level 2 surveys only), all subsequent GPS surveying must be performed with an on-site contractor-provided BASE station set over said primary control point.

• DPW reserves right to specify the use of a digital level, rather than an auto-level.

• The contractor shall furnish and use a robotic enabled total station of at least 3” accuracy.

• The contractor shall furnish and use a 360-degree prism with the total station.

• The contractor shall furnish and use equivalent of a Trimble DiNi Digital level.

• The contractor shall furnish all suitable tools and accessories necessary for proper operation of above specified equipment, such as tripods and range poles.

b. Material

• Furnish acceptable tools and supplies of the type and quality suitable for level 1 and level 2 surveys.

roadway survey work. Furnish 48 inch stakes, flags and of sufficient length to provide a solid set, in the ground, with sufficient surface area above ground for necessary legible and durable markings.

• Specifically: 48-inch stakes and/or flags of sufficient length to provide a solid set, in the ground, with sufficient surface area above ground for necessary legible and durable markings. Contractor must use a “Jumbo Sharpie” or equivalent permanent marker when marking wood stakes (no fine-tip permanent markers).

• For visibility purposes, 48-inch wood stakes must either have surveyor’s flagging ties to top end of stake or be sprayed with construction marking paint. Contractor must be sure that marking paint does not cover any permanent marker markings.

• Specifically: Bluetops must be railroad spikes with whiskers

• Material Maintenance and Removal

• Maintain legibility of stake markings for the duration of the project or until notified in writing the stakes are no longer needed. Replace stakes if necessary to ensure markings are maintained.

• Remove and dispose of surveyor’s flagging, paint, lath, stakes, and other staking material after the project is complete.

4. RECORD KEEPING AND DATA SUBMISSION

(a) Record survey and measurement field data in an approved format in a page-numbered survey field book. Each project must have its own separate field book (contractor must not have multiple projects within the same field book). Submit as-staked data and corrections made to the Constracting Officer Representative (COR) Government with furnished survey data. Submit survey and measurement data on a weekly basis, unless otherwise approved by the Contracting Officer’s representative. Field data and supporting documentation become the property of the Government upon completion of the work.

(b) Data relating to horizontal and vertical alignment, theoretical slope stake catch points, and other design data will be furnished, at the discretion of the Government. Reformatting and additional calculations may be required for the convenient use of the Government-furnished data. Provide immediate notification of apparent errors in the initial staking or in the Government-furnished data.

5. LIABILITY

(a) Acceptance of the construction survey staking does not relieve the Contractor of responsibility for correcting errors discovered during the work and for bearing additional costs associated with the error.

6. CAD DRAWINGS

(a) The Contractor shall furnish electronic CADD data ( Civil 3D

DWG format) to the Government.

(b) The Contractor shall furnish a CSV of point data in the format:

point#, northing, easting, elevation, and description (PNEZD) to the Government.

(c) Surveys shall be delivered as an Autodesk Civil 3D drawing file in accordance with a COR provided template (official template still in development), that includes all survey points, control benchmark points, a table of elevated durable hard benchmarks set in either concrete or asphalt with corresponding elevations and annotations of distinct survey features. All line-strings shall be connected and checked for accuracy. Unless otherwise directed, drawing units must be set to US SURVEY FEET. The coordinate system, units of measure, and both scale factors (combined and inverse of combined) must be annotated in the drawing. Unless otherwise stated, a 1’ and 5’ contour surface must be created in the drawing.

Unless otherwise directed, features to be annotated are:

- Road names

- Material transitions (asphalt to concrete, etc.)

- Culvert material types and dimensions

- Any oddities/irregularities that are not readily apparent, such as silted over culverts, erosion to critical areas, etc.

- Benchmarks

- All man-made features

- Total number of parking spaces per parking row

All survey figures (linework) shall be connected and checked for accuracy. Contractor must create a destructive outer surface boundary. Unless otherwise directed, drawing units must be set to US SURVEY FEET. The coordinate system, units of measure, and both scale factors (combined and inverse of combined) must be annotated in the drawing. Unless otherwise stated, a 1’ and 5’ interval contour surface must be created in the drawing.

DPW has a temporary interim template to be used until the official DPW template has been finalized.

7. CONSTRUCTION STAKING

(a) All construction staking and subsequent checks to be performed with use of total station and not GPS

(b) When performing elevation checks on grade and subgrade, contractor m must use a rod shoe/boot so that rod tip does not sink into the ground.

(c) Centerline Establishment

a. Establish or reestablish centerline at roadway design cross-section locations and as necessary to construct the work. Reestablish the centerline when construction survey and staking work does not meet the tolerances.

(d) Culverts

a. Verify and set culvert locations at the inlet, outlet, and inlet basin points according to the plans. Perform the following if culvert design does not fit field conditions:

• Survey and record the ground profile along the culvert centerline;

• Determine the slope catch points at the inlet and outlet;

• Set reference points and record information necessary to determine culvert length and end treatments;

(e) Miscellaneous Survey and Staking.

a. Survey and stake other work (such as guardrail, curb and gutter, turf establishment, utilities, and excavation limits for structures) to the proper location and required tolerances.

All construction staking shall be done with a total station.

8. COORDINATE SYSTEMS

(a) Surveys shall be conducted in US State Plane 1983, Texas Central

4203, NAD (2011) Geoid 18, subject to change based on most current NGS standards. Elevations will be referenced to the NAVD88 vertical datum.

(b) Unless otherwise directed, Survey data shall be collected in GRID

COORDINATES

(c) Unless otherwise directed, both a COMBINED SCALE FACTOR and INVERSE COMBINED SCALE FACTOR shall be provided. Scale factors should be carried out to eight (8) places ten (10) places past the decimal.

Example: 1.0001559357

9. SCALE FACTORS

(a) Unless otherwise directed, both a COMBINED SCALE FACTOR and INVERSE

COMBINED SCALE FACTOR shall be provided. Scale factors should be carried out to eight (8) places.

(b) Unless otherwise directed, the scale factors shall be derived from a centrally located point, relative to the project, and the elevation used in the calculation of the scale factor should be the project average.

(c) Unless otherwise directed, on long corridors, a new scale factor should be established every 10 miles. (Scale factors are good for a 5-mile radius, providing there is no drastic change in elevation.)

(d) If possible, scale factor should be derived from a durable control point, set or drilled into concrete in a location that would provide good protect from disturbances.

10. PERMANENT SURVEY BENCHMARKS (LEVEL 1 SURVEY, ONLY) (benchmark is defined as a control point that has an X, Y, Z coordinate)

(a) Where required, the Government shall supply ONLY the survey benchmark monument discs. Contractor must provide all required excavation and concrete supplies. If directed, the Contractor shall place the permanent survey bench mark at a project location, set within concrete or a hard, durable and immovable surface according to the TxDOT Survey Manual, section ‘C’ Monumentation. The Contractor shall submit GPS solution coordinate information to the National Geodetic Survey Online Positioning User Service (NGS OPUS) and furnish the benchmark data sheets to the project’s contracting officer’s representative for all permanent benchmarks on site.

(b) Data collection interval for NGS OPUS point coordinate shall be 3 hours. Logging interval shall be every 5 seconds.

(c) DPW COR may instruct that the monumentation be steel-stamped with any combination of alpha-numeric steel-stamps. Stamping supplies will be provided by contractor.

(d) All benchmarks must be flagged with survey flagging, and made visible with a flagged / spray painted wood stake. Wood stake must be marked with Benchmark number and Final (Leveled) elevation. A pig pen/cage consisting of 3 wood stakes must be used if Benchmark is at risk of being disturbed. Photos of benchmarks shall be provided to COR DPW.

(e) All permanent benchmark elevations must be established with a level and must be relative to a selected primary permanent benchmark.

(f) COR reserves the right to select locations for Permanent benchmarks.

(g) Photos of permanent benchmarks must be provided to COR.

(h) Close up photo.

(i) Photo from 15-20 feet away for visual reference of location.

(j) COR may inspect benchmarks to determine suitability/durability. If benchmarks are deemed unsuitable, then COR may request that benchmarks be reset.

(k) If excavation is needed to set a permanent benchmark, then a dig permit is required. (If a dig permit is required then it is the contractor’s responsibility to obtain that permit.)

11. TEMPORARY BENCHMARKS (also referred to as “TBM”) (LEVEL 2 SURVEY) (benchmark is defined as a control point that has an X, Y, Z coordinate)

(a) National/Cooperative CORS network may be used to establish only the primary TBM.

a. Primary TBM must be a durable point e.g., a mag nail set in concrete, or a concrete monument.

b. All subsequent TBMs must be established using a base station set over the primary TBM.

c. The contractor shall not go outside a 1-mile radius of the primary TBM to establish any TBM – If this radius limitation is not feasible, then the contractor shall establish both their primary and secondary TBMs by means of an OPUS solution and not with a CORS network/base combination.

(b) Alternatively, contractor may use OPUS solutions to establish TBMs.

(c) All TBMs must be elevated from a selected Primary TBM with use of a level unless it was established with a total station as a primary spur TBM.

(d) Multiple secondary benchmarks should be established to ensure redundancy in the case of a benchmark being destroyed.

(e) At least 1-2 durable offsite benchmarks shall be established. All other TBMs may be set at the discretion of the contractor.

(f) All TBMs shall include X, Y, Z coordinates.

(g) Benchmarks that are conveyed to COR for use in drawing must be durable e.g., a mag nail set in concrete, or a concrete monument.

(h) COR may inspect benchmarks to determine suitability/durability. If benchmarks are deemed unsuitable, then COR may request that benchmarks be reset.

(i) Photos of TBM must be provided to COR.

a. Close up photo.

b. Photo from a distance of 15-20 feet away for visual reference of location.

(j) Generally, the contractor shall place benchmarks, where needed.

(k) Contractor must relocate primary TBMs that are in conflict with construction to areas that will not be disturbed by construction operations.

(l) Furnish the GPS coordinates, level elevations, and supporting documentation for all benchmarks to the COR.

(m) Set durable monuments for survey benchmarks that uniquely identify the points.

(n) A wood hub shall not be used as a benchmark.

(o) The use of a 1/2-5/8 inch iron rebar with a plastic cap and center divot may be used, but pending the approval of the COR due to potential excavation restrictions. (If a dig permit is required then it is the contractor’s responsibility to obtain that permit.)

(p) Mag nails of any size may be used as a TBM

12. UNITS OF MEASUREMENT

(a) Units of measurement shall for the remainder of 2022 be in US SURVEY

FEET, and thence from 2023 in INTERNATIONAL SURVEY FEET. Units of measurement subject to change based on NIST and NGS notices.

13. INSTRUMENT CALIBRATIONS

(a) All surveying equipment shall be appropriately calibrated per the manufacturer’s guidance or according to the Texas Society of Professional Surveyors (TSPS) Manual of Practice prior to use on a government project.

(b) Certificate of calibration shall be made available upon request of the COR for total station / scanning equipment.

(c) Digital levels shall be field calibrated before the start of each new project. For longer duration projects, the digital level shall be field calibrated at the start of said project and thence at the beginning of every subsequent week.

(d) Auto levels shall be peg tested before the start of each project.

For longer duration projects, auto levels shall be peg tested at the start of said project and thence at the beginning of every subsequent week. At 100’ acceptable error of a peg test is less than or equal to 0.01’.

(e) For Auto and Digital levels, calibration log book that states SERIAL# OF INSTRUMENT and DATE/TIME of calibration shall be kept and made available upon request. Particular to Auto Level peg test, log book entry shall state resulting error of peg test.

(f) Rover poles shall be regularly checked for true plumb and may be subject to inspection.

(g) Rover poles must be checked to ensure they are not bent.

(h) Ensure all tribrachs are regularly checked / calibrated.

(i) Ensure that all fixed-height tripods are regularly checked for true plumb.

(j) All survey equipment used by contractor is subject to onsite inspection by DPW.

14. TOTAL STATION WORK

(a) Spur benchmarks control points set via total station shall be described as such, and traverse TBMs control shall go no more than 1 Spur without fully closing traverse or checking into an existing TBM or permanent Benchmark GPS control point E.g. a spur point set from a spur point needs to be checked for closure. Notes of closure shall be recorded in field notes.

(b) Spur points shall be set by measuring rounds and the use of a bipod.

(c) A total station backsight check shall be performed approximately every 200 shots. Use the option of STORE AND REORIENT [assuming the backsight check reads (project dependent) close to the initial station setup backsighting].

(d) Perform a backsight check before breaking down the total station.

(e) Perform a backsight check when resuming station setup after changing a dead battery.

(f) Depending on projects specified degree of precision, if check shots have a level of error deemed “High” then all previous observations must either be thrown out and resurveyed or be checked for accuracy.

(g) For foresight shots, do not exceed 1.5x backsight site distance.

(h) For foresight shots, do not exceed 500’ where elevations are critical.

15. LEVELING

(a) COR reserves right to specify the use of a digital level, rather than an auto-level.

(b) Unless otherwise specified, level loops must originate from a Primary

Control point and must close back in on the same Primary control point.

(c) Must “break a leg” on tripod before running level back to start point.

(d) Surveyor must strive to have balanced backsight and foresight shots within +/- 10’ on each leg of level loop.

(e) Level notes must be kept by the surveyor and must be provided to DPW.

16. CONTROL POINTS (LEVEL 2 SURVEY)

(a) Contractor shall place control points, where needed.

(b) Relocate initial horizontal and vertical control points in conflict with construction to areas that will not be disturbed by construction operations.

(c) Furnish the GPS coordinates, elevations, and supporting documentation for all control points to the contracting officer’s representative.

(d) Set durable monuments for survey control that uniquely identify the points.

(e) A wood hub shall not be used as a control point.

17. ORIGINAL GROUND, TOPOGRAPHIC AND AS-BUILT SURVEYING (LEVEL 2 SURVEY, ONLY)

(a) Survey data shall include all improvements (the requirement to locate certain features may be waived on a case-by-case basis at the discretion of DPW), such as but not limited to the following:

a. Roadway edge/edge of gutter, centerline, crown of road, back of curb, and flow line of gutter locations.

b. Fencing.

c. Drainage features (culvert invert elevations, ditches, headwalls, wing walls, outlets, inlets, etc.).

d. Signage (Both road and non-roadway) locations and descriptions.

e. Apparent utility locations (utility poles, manholes, utility vaults, overhead electric, electric meters, conduits, irrigation control valves, etc..).

f. Spot location of all trees except for Ashe Junipers.

g. Spot elevations, top of slopes, bottom of slopes, grade breaks, flow-lines, washouts, and all other ground features.

h. Building corners.

i. Any other significant improvements and topo features.

(b) On a case-by-case basis:

a. Road defects: Potholes, Cracking, Sinking.

b. Finished Floor elevations.

c. Building heights.

d. Stockpiles.

e. Utility markers (Paint markings/pin flags).

f. Paint striping

(c) Unless specified, topography shots should be taken to the edge of water.

18. CROSS SECTIONS AND GRIDDING

(a) Unless otherwise directed, surveys of roadways must be completed at

50’ cross-section intervals

(b) Unless otherwise directed, topographic surveys must be completed at 50’ grids

(c) Contractor must take care to locate all intermediary features, such as, but not limited those listed above in para. 16, that the cross-sectioning does not account for.

19. GPS WORK

(a) GPS work is to be done typically within a 1 mile radius (unless stated otherwise by COR) of local base and not from a cooperative CORS network.

a. A cooperative CORS network is only to be used to establish a

Primary TBM.

(b) GPS is not to be used for construction staking or construction checks.

(c) A GPS check shot should be taken and the inverse recorded in the survey notes at the beginning of the day before GPS survey data collection commences, at midday, and finally at the end of the day before equipment is broken down.

(d) Depending on projects specified degree of precision, if check shots have a level of error deemed “High” then all previous observations must either be thrown out and resurveyed or be checked for accuracy.

20. CULVERTS

(a) Culvert shots shall be measured at the bottom FLOWLINE of the pipe.

Any silt obstructing the flow line shall be removed before taking a shot to ensure that the tip of the surveyor’s rod is indeed resting at the flow line of the pipe.

(b) All pipe diameters shall be measured in inches and conveyed as such.

(c) Surveyor shall specify pipe material (PVC, reinforced concrete pipe, corrugated metal pipe, corrugated plastic pipe).

(d) Surveyor shall convey how silted up the pipe is as a %

(e) A reasonable attempt should be made to locate outflow/inflows of culverts and pipes EVEN if outside of project limits.

(f) A closed grade break line shall be taken around culverts.

(g) A reasonable attempt must be made to dig out silted over culvert features. If after a reasonable dig attempt is made and it is determined that an excessive amount of effort would be required to uncover silted culvert feature, then a shot may be taken were silt meets the buried culvert feature. Shot must include description “AT SILT” e.g. WWL E AT SILT

(h) Box culverts shall be measured in the format Width x Height x Chamfer

a. Example shot description: CB 6W 3H 0.5CH 0SILT

b. Example shot description: CB 4W 5H 50SILT

21. FEATURE CODE LIBRARIES (CODE LISTS)

(a) Surveyor shall use COR DPW specified feature code list (Subject to change).

(b) Surveyor shall use command codes to create automatic linework within the survey codes. E.g. “BC B” “BC PC” “BC PT” “BC PT CLS E”.

(c) Command codes shall in the format:

FeatureCode_CommandCode_Descriptor.

(d) Subject to change, but combo shots should be limited to 3 features.

(e.g., PP OHE OHE1)

(e) Power poles with a luminaire shall be coded as “LP”.

22. BENCHMARKS

(a) All vertical benchmarks must be elevated from a Primary Vertical

Benchmark.

(b) Multiple Elevated Benchmarks should be established to ensure redundancy in the case of a benchmark being destroyed.

(c) All benchmarks shall include X,Y,Z coordinates.

(d) Photos of benchmarks must be provided to DPW.

a. Close up photo.

b. Photo from a distance of 15-20 feet away for visual reference of location.

23. POINT RANGES

(a) Surveyor shall keep shots organized by point ranges, and daily point ranges shall be recorded in field notes e.g. control = 100-500, topo points = 20000-29999.

(b) If multiple data collectors are used within the same project then each data collector shall have separate, unique point ranges. Point ranges for each data collector shall be recorded in field notes.

(c) Contractor shall ensure that there are no duplicate points in submitted data.

24. SURVEY LINE WORK

(a) When locating elevation-critical line-strings in the field such as a grade break or a top of slope, the surveyor must ensure that such line strings do not cross over one another vertically.

– This is known as “crossing breaklines” and will result in errors upon import into a CAD surface.

25. BACK OF CURB / GUTTER / FLOWLINE OF GUTTER

(a) Back of Curb, Flow line of Gutter and Edge of pavement/edge of gutter shots shall be taken as a single in-line unit. E.g. if a BACK OF CURB shot is taken then the FLOW LINE OF GUTTER and EDGE OF PAVEMENT/EDGE OF GUTTER SHOTS must also be taken.

26. DPW COR SPOT CHECKS AND VERIFICATION WORK

(a) Periodic spot checks may be performed by DPW to check contractor’s work.

(b) It is the contractor’s responsibility to remedy any discrepancies that are uncovered by COR’s checks.

27. GPS SHOT LENGTHS (level 2 surveys)

(a) Topo point: 3 seconds. (No Rapid Points)

(b) Benchmarks: 3 separate 120 second observations averaged together as a computed point.

a. Procedure for averaging TBMs as follows:

• Take first observations.

• Reset RTK.

• Take second observations, compute average.

• Reset SV Tracking.

• Take third observation, compute average.

28. MEASUREMENT

(a) Surveying will be measured and paid by the acre (AC) of surface area for the following types of surveys:

004.1: Level 1 Survey: Project Benchmarks Control and

Realignment.

004.2: Level 2 Survey: Existing, As-built’s and

Construction.

29. PAYMENT

(a) The work performed in accordance with this specification and measured as provided under "MEASUREMENT" will be paid for at the unit price for the extent of work shown on plans or specified in scope of work.

30. UNDERSTANDING

(a) It is the responsibility of the contractor to read, understand, and abide by all of Section 004 (Surveying). If there are any misunderstandings on behalf of the contractor regarding section 004, then it is the responsibility of the contractor to reach out to the COR surveyor for further clarification.

31. TOLERANCES9

TABLE 004-1

CONSTRUCTION SURVEY AND STAKING TOLERANCES (1)

STAKING PHASE HORIZONTAL VERTICAL

Control Benchmarks Points set from existing Government Control Points or Benchmarks

+/- 0.03 feet +/- 0.01 feet x √𝑵 (1)

Mapping, topography, and cross-section points

+/- 0.16 feet +/- 0.16 feet

Centerline points (2) including (PC), (PT), (POT), (POC), and references

+/- 0.06 feet +/- 0.06 feet

Slope-stake and slope stake references (3)

+/- 0.16 feet +/- 0.16 feet

Culverts, ditches, and minor drainage structures stakes

+/- 0.16 feet +/- 0.06 feet

Retaining walls stakes +/- 0.06 feet +/- 0.03 feet

Curb and gutter stakes +/- 0.06 feet +/- 0.03 feet

Clearing and grubbing limit stakes

+/- 1.00 feet -

Roadway subgrade finish stakes (4)

+/- 0.16 feet +/- 0.03 feet

Roadway finish grade stakes (4)

+/- 0.16 feet +/- 0.03 feet

(1) N is the number of instrument setups.

(2) Centerline points:

PC - point of curve PT - point of tangent POT - point on tangent POC - point on curve

(3) Take the cross-sections normal to the centerline +/- 1 degree

(4) Includes ditches

32.

SECTION 101

SAW CUTTING

(LINE ITEMS: 101.1, 101.2, 101.3 & 101.4)

Line items used to perform Saw Cutting through Asphalt and Concrete Pavements

Under this item, the Contractor shall saw cut existing asphalt pavement, concrete pavement, asphalt surface course, or asphalt concrete overlay on concrete pavement at the locations indicated on the plans:

101.1 : Asphalt to 3” Depth

101.2 : Additional 1” (Asphalt)

101.3 : Concrete to 3” Depth

101.4 : Additional 1” (Concrete)

2. MATERIALS (NOT SPECIFIED)

Existing pavement and overlay shall be saw cut perpendicular to the roadway surface along neat lines, and to the depth indicated on the plans and typical sections. A power saw approved by the COR shall be used for cutting asphalt surface course and asphalt overlay. A power saw shall be used for cutting concrete pavement. After the existing asphalt pavement, concrete pavement, asphalt surface course or overlay has been saw cut through, the contractor may use pry bars, pneumatic tools or other methods approved by the Contractor Officer’s Representative (COR), to pry loose the existing pavement from that pavement which is to remain. A pavement breaker, under the supervision of the COR, may be used to break up the pavement to be removed after the pavement has been completely saw cut through and completely free from the pavement to remain.

Any existing pavements and curbs not indicated to be removed that are damaged by the Contractor's operations, shall be repaired by him to the satisfaction of the Contracting Officer.

The unit of measure for saw cutting shall be determined by the linear foot (LF) actually completed and accepted by the COR .

The unit price bid per linear feet of saw cutting shall include the cost of all labor, materials, and equipment necessary to complete the work. Depth of cut is irrelevant.

Payment for removal and disposal of cut pavement shall be paid for under the appropriate excavation item.

SECTION 102

REMOVAL OF FLEXIBLE PAVEMENTS

(LINE ITEMS: 102)

Line item used to perform the Removal of Flexible Pavements

102.1: Removal of Flexible Pavements, to 4” Depth

102.2: Removal of Flexible Pavements, Beyond 4” Depth

All existing material shall be completely removed or an existing layer shall be removed as necessary for construction of new paving, transitional areas, and for other construction operations requiring removal. Edges to be matched to new and/or existing construction shall be saw cut according to Section 101 Saw Cutting. All bituminous materials binder and aggregate shall be thoroughly removed. Any damage occurring to surfaces of pavements to remain due to Contractor's operations shall be repaired at the contractor’s expense. Removal shall be by approved methods, and the materials removed shall be disposed of as directed by the Contracting Officer’s Representative. Material shall be segregated and disposed of by type. Please see Technical Exhibit “G, Division 1 Section 01 57 20.00 10 LL ENVIRONMENTAL PROTECTION for further details.

102.1 - The unit of measure for removal of the first four inches of depth of flexible pavement shall be the square yard.

102.2 – The unit of measure for removal of flexible pavement for depths greater than four inches shall be the cubic yard.

Payment for the unit price bid shall include the cost of all labor, materials, and equipment necessary to complete the work.

102.1 - Payment shall be at the contract unit price per SQUARE YARD for removal of flexible pavement for the first four inches of depth.

102.2 – Payment shall be at the contract unit price per CUBIC YARD for removal of flexible pavement beyond four inches deep.

SECTION 103

REMOVAL OF REINFORCED CONCRETE

(LINE ITEMS: 103)

Line item used to perform the Removal of Reinforced Concrete

103: Removal of Reinforced Concrete shall be removed as necessary for construction of new paving, transitional areas, and for other construction operations requiring removal. Edges to be matched to new and/or existing construction shall be saw cut according Section 101, “SAW CUTTING”. Existing reinforcing steel at the junction of new and partially removed old concrete shall be incorporated into the new construction where applicable. All concrete and reinforcing steel shall be thoroughly removed. Any damage occurring to surfaces of pavements to remain due to Contractor's operations shall be repaired at the Contractor’s expense. Removal shall be by approved methods, and the materials removed shall be disposed of as directed by the Contracting Officer’s Representative. The concrete that is removed must be broken down into pieces no larger than 3 feet by 3 feet.

Protruding steel is not acceptable, the steel must be cut off flush with the concrete.