629Survey Monumentation

Survey Monumentation Description

629.01This work consists of locating, preserving, referencing, installing and restoring land

monuments, such as Primary Control monuments from which the right of way or any land boundary will be calculated, described or monumented, Public Land Survey System (PLSS) monuments, General Land Office (GLO) monuments, Bureau of Land Management (BLM) monuments, Mineral Survey (MS) monuments, Right-of-way (ROW) monuments, property boundary monuments, easement monuments, and other monuments that are required by law or regulation to be established and recorded by a Professional Land Surveyor (PLS), and the determination of any land boundary, shall be done per Section 629, under the supervision of a PLS who is experienced and competent in Right of Way and boundary surveying and licensed in the State of Colorado.

All such monuments included in this section shall be established per the applicable and most recent editions of the Department of Interior’s Manual of Surveying Instructions (BLM Manual), Colorado Revised Statutes (CRS), Colorado State Board of Licensure for Professional Engineers and Land Surveyors (State Board) Rules and Policies, the Memorandum of Understanding (MOU) with the State Board and CDOT, and the CDOT Survey Manual, under the supervision of a PLS who is experienced and competent in Right of Way and boundary surveying and licensed in the State of Colorado.

The PLS shall be available to review work, resolve problems, and make decisions in a timely manner. Unless specified otherwise in the contract, all survey procedures shall be in conformance with the CDOT Survey Manual.

Materials and Equipment

629.02The Contractor shall furnish all personnel, survey equipment, safety equipment,

materials, and traffic control necessary to perform the required monumentation and related surveying. Monuments and monument boxes will be furnished by the Department. The various types of monuments and monument boxes shall be constructed according to the details shown on Standard Plan M-629-1. The Contractor shall furnish all labor, survey tools, equipment, and incidental materials such as but not limited to concrete, grout, asphalt caulk, glue, epoxy, nails, stakes, lath, and replacement monuments of the variety not included on the Standard Plan M-629-1. All surveying equipment, including Electronic Distance Measuring Instruments (EDMI), total stations, levels, rods, tapes, tripods, tribrachs, and Global Positioning System (GPS) receivers and equipment, shall be checked and calibrated per the Colorado Department of Transportation

the start of work and every six months thereafter. EDMI and total stations shall be checked and calibrated on a National Oceanic and Atmospheric Administration/ National Geodetic Survey (NOAA / NGS) calibrated baseline per the CDOT Survey Manual, Chapter 2, Section 2.1 and 2.2, and documented in the survey records before the start of work and every six months thereafter.

629.03 GPS receivers and equipment shall be checked and calibrated on a NOAA / NGS calibrated baseline per the CDOT Survey Manual, Chapter 3, Section 3.3, and documented in the survey records before the start of work and every six months thereafter. Levels shall be checked and calibrated per the CDOT Survey Manual, Chapter 6, and Chapter 5, and documented in the survey records before the start of any level circuit. If any survey equipment is found to be functioning outside the manufacturer’s specified tolerance, certification from an approved repair facility showing that the instruments have been repaired, properly adjusted, or both if needed shall be included in the survey records and submitted to the Engineer before being used. Traffic control shall be per Section 630. Construction Requirements

629.03General. The Department will establish Primary horizontal and vertical control for

the project. All available information defining the extent of that control is provided on the plans per the CDOT Survey Manual Chapter 6, or is available from the Engineer and CDOT PLS Coordinator or Project Engineer. A Presurvey Conference – Construction Survey meeting be held per the CDOT Survey Manual Chapter 6, Section 6.1.6, before performing any surveying work under this section. The Engineer, Region Survey Coordinator and Plans Coordinator (or designee), Contractor’s Superintendent, Contractor’s Surveyor (PLS) and Party Chief shall attend. A Presurvey Conference – Construction Survey Form shall be included per the CDOT Survey Manual Chapter 6. A surveying work schedule shall be submitted to the Engineer for review before the Presurvey Conference. The Contractor shall check all Department established Primary horizontal and vertical control points per the CDOT Survey manual Chapter 6, Section 6.2, and verify and document in the survey records their horizontal accuracy tolerance per the CDOT Survey Manual Chapter 5, Section 5.5, and their vertical accuracy tolerance per the CDOT Survey Manual Chapter 6.2, and Chapter 5.9, for a CDOT Class A, Primary Survey before using them for monumentation and surveying control. Survey records shall be completed as the work is done. Field survey notes for monumentation, surveying and checking by the Contractor shall be recorded in survey records in conformance with the format given in the CDOT Survey Manual Chapter 6, Section

6.1Survey field books shall be indexed per the Survey Manual Chapter 2, Section 2.4

The Contractor shall make all survey records generated available to the Engineer for inspection or reproduction at all times. The Contractor shall submit all survey records to the Engineer before Final Acceptance. All survey records are considered property of the Department. The responsible PLS or PE identified in subsection 629.01, shall electronically seal all survey records. The electronic format shall contain the information and format as required in the Survey Manual Chapter 6, Section 6.1 including stakeout data and the raw data from the actual placement of the monuments. Survey records shall include the requirements specified in the CDOT Survey Manual Chapter 6, Section 6.3, and Chapter 5, Section 5.12, for any PLSS monument, GLO monument, BLM monument, or MS monument on the project.

629.04

Copies of any new Monument Records filed by the PLS with the State Board of Registration per the CDOT Survey Manual Chapter 6, Section 6.3, and Chapter 5, Section 5.12, shall be submitted to the PLS Coordinator and Engineer, after filing with the State Board.

629.04Locating Monuments. This work consists of field locating all survey monumentation

that is in place because of a Government (Federal, State, County or Municipal) survey or resurvey as shown on original PLSS, GLO, BLM, or MS plats, notes, or other survey monumentation documented in the public record per the CDOT Survey Manual Chapter 6, Section 6.3. A diligent search of construction zones and project limits shall be performed by the PLS per the Survey Manual Chapter 5, Section 5.12, to locate any survey monumentation of the public record. An electronic magnetic field sensor or locator shall be used in this search. The responsible PLS shall document the search, and time spent searching, in the survey records using a narrative form. The survey records shall include the procedures used to make the diligent search, a description of each monument searched for, and the actions taken to reference and preserve the location of the monument per subsection 629.05.

629.05Preserving and Referencing Monuments. This work consists of field surveying,

establishing, installing, and making measurements to reference monuments that will facilitate the installation of a replacement monument in the event the construction activity disturbs a monument of the public record as listed in subsection 629.04. Referencing of monuments for possible replacement requires the use of correct replacement methods so the stated precision of the monument in question is not degraded.

When a construction activity is planned that will disturb an existing PLSS, GLO, B.L.M., or MS monument, the monument shall be referenced and the survey records shall include the information required in subsection 629.03, and the monument shall be upgraded by the PLS and a new Monument Record filed with the State Board per the Survey Manual Chapter 5, Section 5.12, when the following conditions are met:

that indicate conflicting locations.

A new monument record shall be filed with the State Board per Title 38 CRS and State Board Rules and Polices, a disclaimer should be written on the new Monument Record stating, “the new monument was set in the same location as described by the previous monument record”.

When conflicting evidence of the location of an existing PLSS, GLO, BLM, or MS monument is encountered and construction activity is planned that will alter the evidence, the monument shall be referenced, and the survey records shall include the information required in subsection 629.03. A minimum of two CDOT permanent reference monuments shall be established per the CDOT Survey Manual, Chapter 5, to reference the location of all existing found monuments. Reference monuments must meet the required physical standards of the actual monument for the type of monument being referenced. These references shall be set when all of the following conditions are met:

629.05 The reference monuments shall be set and stamped per Title 38 CRS and State Board Rules and Polices, a new monument record should be marked “Other” for “Type of Monument” and a full explanation given on the monument record as to why the presumed monument was not upgraded, the monument record shall be filed with the State Board per Title 38 CRS.

Copies of all new Monument Records filed by the PLS with the State Board shall be submitted to the CDOT PLS Coordinator and Project Engineer, after filing with the State Board.

The equipment used in referencing or replacing the monument shall be able to produce the stated accuracies as specified by the owner of the monument. For example, the Colorado High Accuracy Reference Network (HARN) and CDOT HARN Densification (HARND) monuments shall be referenced or replaced using Dual Frequency survey grade GPS equipment per the procedures set forth under the most recent Policy of the National Ocean Service Regarding the Incorporation of Geodetic Data of Other Organizations into the National Geodetic Survey Data Base, standards of accuracy are given in the Standards and Specifications for Geodetic Control Networks and Geometric Geodetic Accuracy Standards and Specifications for using GPS Relative Positioning Techniques (as amended).

National Geodetic Survey (NGS), U.S. Coast and Geodetic (USCG), and U.S. Geological Survey

per the procedures set forth under the most recent edition of the NGS Benchmark Reset Procedures. The temporary benchmarks shall be set outside the construction area so a permanent monument can be reset upon completion of the construction.

Referencing, moving, or replacing a federal or local government agency monument shall be done per the CDOT Survey Manual Chapter 6, Section 6.1, and Chapter 5, Section 5.12. Before referencing, moving or replacing the monument the NGS Western Region State Geodetic Advisor and the CDOT Region Survey Coordinator is to be notified, contact information is available in the CDOT Survey Manual Chapter 5, Section 5.3.6.

Survey records for referencing, moving, or replacing a federal or local government agency monument shall include documentation of the work per subsection 629.03. The survey records shall be submitted to the CDOT PLS Coordinator or Project Engineer, for review, before payment is made and shall include the following:

a view of the monument looking toward the horizon in each of the cardinal directions.

“to-reach” description.

monument’s positional tolerance has not been degraded. The documentation shall conform to the owner of the monument’s specifications that control the work. Before Survey Monumentation payment is made, the Contractor’s surveyor shall submit legible electronically sealed copies of the survey records per subsection 629.03. Before final Survey Monumentation payment and before depositing with the county, per Title 38 CRS, Property – Real and Personal, State Board Rules and Policies, MOU, and the CDOT Survey Manual, the Contractor shall complete and electronically seal all survey records, the Right of Way (ROW) Plans, and the Project Control Diagram (new, supplemental or amended) and submit copies the Engineer.

629.06

629.06Installing Monuments. This survey work consists of installing Primary Control

monuments, benchmarks, ROW monuments, property boundary monuments, easement monuments, PLSS, GLO, BLM, or MS monuments, and other monuments included on the plans. The work shall include determining the location of the monuments, installing the monuments, and verifying the positional accuracy of the monument is correct. A Primary Control survey, when not furnished by the Department, shall be performed per the CDOT Survey Manual Chapter 5, meeting the horizontal and vertical accuracy tolerances for a CDOT Class A, Primary Survey. A Project Control Diagram shall be submitted to the Engineer and the Region Survey Coordinator for all new Primary Control monuments and surveys per the CDOT Survey Manual Chapter 5, Section 5.11.

Vertical accuracy tolerances for Primary Control monuments and surveys shall be as specified in the CDOT Survey Manual Chapter 6, Section 6.4 and Chapter 5, Section 5.9.

Unless stated otherwise in the contract, if construction activity disturbs a Primary Control monument (or benchmark) a new Primary Control monument (or benchmark) shall be installed by the Contractor per the CDOT Survey Manual, Chapter 6, Section 6.2. Primary Control monuments shall be set so they are intervisible from at least two adjacent Primary Control monuments and shall not exceed 0.6 mile between adjacent intervisible Primary Control monuments. Primary Control monuments set by the Contractor shall not conflict with construction activities. The Primary Control survey shall consist of a closed loop network and have adequate redundancy, precision, and accuracy to prove that all the monuments included in the network are within the horizontal and vertical accuracy tolerance as specified in the CDOT Survey Manual Chapter 5, Section 5.5 for a CDOT Class A , Primary Survey.

Survey records shall include documentation of Primary Control monuments and survey per subsection 629.03. A supplemental or amended Project Control Diagram shall be submitted to the Engineer and the Region Survey Coordinator for all replaced, transferred or re-established Primary Control monuments per the CDOT Survey Manual Chapter 6, Section 6.2.

ROW monuments, property boundary monuments, and easement monuments shall be installed per the CDOT Survey Manual Chapter 6, Section 6.3, and Chapter 5, Section 5.12, meeting the horizontal accuracy tolerances as specified in the CDOT Survey Manual Chapter 5, Section 5.5 for a CDOT Class B, Secondary Survey using the Primary Control monuments and the data on the Control and Monumentation sheet of the ROW plans.

Additional Secondary Control monuments may be required to be set per the CDOT Survey Manual Chapter 5, Section 5.6.8, meeting the horizontal accuracy tolerance specified in the CDOT Survey Manual Chapter 5, Section 5.5 for a CDOT Class B Secondary Survey, before the ROW monuments are installed.

The procedures used to set ROW monuments shall include an independent check of the installation per the CDOT Survey Manual Chapter 5, Section 5.12. Survey records shall include documentation of the survey preformed to establish the monuments per subsection 629.03. The independent check shall be documented in the survey records and the field measured differences calculated or reduced to show the work is within the specified horizontal accuracy tolerance.

629.07 PLSS, GLO, BLM, or MS monuments shall be installed per the CDOT Survey Manual Chapter 6, Section 6.3 and Chapter 5, Section 5.12, meeting the horizontal accuracy tolerance specified in the CDOT Survey Manual Chapter 5, Section 5.5 for a CDOT Class B Secondary Survey using the Primary Control monuments and the data on the Control and Monumentation sheet of the ROW plans. The procedures used to set PLSS, GLO, BLM, or MS monuments shall include an independent check of the installation per the CDOT Survey Manual Chapter 5, Section

5.12Survey records shall include documentation of the survey preformed to establish the

monuments per subsection 629.03. The independent check shall be documented in the survey records and the field measured differences calculated or reduced to show the work is within the specified horizontal accuracy tolerance.

The installation of ROW, property boundary, easement, PLSS, GLO, BLM, or MS monuments installed at a different location than the data shown on the Monumentation sheet of the ROW plans shall be submitted to the Engineer and the Region Survey Coordinator along with the monuments description and horizontal data in order that the new monument can be revised on the Land Survey Control Diagram and ROW plan sheets.

Copies of all new Monument Records filed by the PLS with the State Board for the installation of new PLSS, GLO, BLM, or MS monuments shall be submitted to the CDOT PLS Coordinator and the Engineer, after filing with the State Board.

629.07Monument Box. This survey work shall consist of installing or adjusting monument

boxes included on the plans. When it is necessary to set a monument within a monument box per Title 38 CRS and State Board Rules and Policies, the work shall be done per Standard Plan M-629-1. If the monument meets the physical standard as stated by the State Board and is situated within the finished roadway, a monument box shall be installed as shown on Standard Plan M-629-1. When an existing monument box, due to construction, will no longer meet the physical standard set by the State Board, the box shall be replaced or adjusted to meet those standards.

Method of Measurement

629.08Survey Monuments, Monument Boxes, and Adjust Monument Boxes will be measured

by the actual number of the various types installed and accepted by the Engineer. Measurement for locating survey monuments will be by the hour as approved by the Engineer.

Basis of Payment

629.09The accepted quantities will be paid for at the contract unit price for each of the

pay items listed below that appear in the bid schedule. No payments will be made before the proposed work schedule is submitted.

Legible signed and sealed copies of survey records per subsection 629.03 shall be submitted on a monthly basis to the Engineer for completed work before payment is made for that pay item.

629.09

Before final payment is made, the following three items shall be completed, bear the seal and signature of the responsible PLS identified in subsection 629.01, and have copies submitted to the Engineer for review before being deposited with the county per Title 38 CRS, Property – Real and Personal, State Board Rules and Policies, MOU, and the CDOT Survey Manual:

The Presurvey Conference – Construction Surveys meeting, equipment calibrations, and survey records will not be paid for separately but shall be included in the work.

Payment will be made under:

Pay Item Pay Unit Locate Monuments Hour Survey Monument (Type) Each Monument Box Each Adjust Monument Box Each

Traffic control for monumentation and related surveying will be measured and paid for per

629.09

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630.01