107Construction Stakeout

— CONSTRUCTION STAKEOUT CATEGORY 100 PRELIMINARY

107.01DESCRIPTION

Furnish, place, and maintain construction layout stakes that demarcate the Limit of Disturbance

of the United States (WUS), stream protection zones (SPZs), floodplains, and tree preservation areas.

.01 Limit of Disturbance (LOD). The allowable limit of earth disturbance as specified in

the Contract Documents.

107.02MATERIALS

.01 Wetland Ribbon. Pink vinyl ribbon having a width no less than 1-1/2 in. and having

the word “Wetland” in black letters.

.02 Demarcation Ribbon. Vinyl ribbon of various colors having a width no less than

1-1/2 in.

107.03CONSTRUCTION

.01 Line and Grade. The Engineer will provide the following

of curvature (PC) and points of tangency (PT), for the preservation and control of the center line.

prints of the cross sections. Use the cross sections as a guide only. Dimensions or elevations scaled from the cross sections are not sufficiently precise for use in construction. Cross sections will not be provided for temporary access roads nor for maintenance access roads. 234 — CONSTRUCTION STAKEOUT

100 ft apart and extending at least 100 ft beyond each end of the structure.

applies, consisting of stations not over 100 ft apart and including the PC, PT, and at least one point on the tangents beyond each end of the curve.

.02 Workmanship. Set and maintain the specified elevations and dimensions

.03 Control Markers. Preserve the center line and benchmarks set by the Engineer

Replace disturbed, damaged, or destroyed control markers.

.04 Control Stakes. As specified in 107.03.01(a), furnish, set, and preserve stakes at each

station along each side of the project on the right-of-way or easement line, whichever is farther from the center line of construction. Where only part of an ultimate dual highway is to be constructed, set the stakes on the side of the future improvement 10 ft beyond the construction limits. On each of the stakes, mark the offset distance from the center line and its top elevation, or the cut or fill to the profile grade line. Place additional stakes as necessary and as directed to ensure the correct layout of the work. For stormwater management (SWM) facilities, furnish, set, and preserve stakes at each station along each side of the maintenance access road and at grading points. Place additional stakes as necessary and as directed to ensure the specified layout of the work.

.05 Layout. For structures, proceed with the layout work as specified in 107.03.01(b)

Before any actual construction begins, verify the lines and grades provided by the Engineer, then establish all center line or working line intersections with the center line or center of bearing of all piers, bents, and abutments. From these field layouts, check the proposed span lengths by either electronic distance measurement or chaining from the field layouts. When chaining, compensate for temperature, sag, and horizontal alignment. Verify the location of the structure to affirm its correct location with relation to existing structures, roads, and existing conditions that are to remain. If discrepancies are found, immediately notify the Engineer in writing. Ensure all lines established on the ground are preserved or referenced, marked, and available at all times. Ensure field elevations of all bridge seats are correct and that are finished to proper grade. When steel beams or girders are incorporated in the project, determine the deflection of each member by running elevations over the tops of the beams or girders after they are in place and before attaching any forms. Apply this information to the deflection diagram to determine the corrected elevation of bottom slab forms and screed supports. The Engineer will check the assembled information. Make necessary adjustments prior to placing concrete. 235 — CONSTRUCTION STAKEOUT For SWM facilities, proceed with the layout work as specified. Verify the locations of drainage structures to affirm the correct location with relation to the SWM facility layout, grading points, maintenance access road, roads, and existing conditions that are to remain. If discrepancies are found, immediately notify the Engineer in writing. Ensure that all lines established on the ground are preserved of referenced, marked, and kept available for the duration of the Contract. Ensure that the field elevations are correct and are finished to the proper grade.

.06 Utilities. Upon request, furnish references to control points, alignment, and grade data

to the utility companies or agencies working within the limits of the project so that they may properly locate and coordinate their work and improvements. Intersection Utility Stakeout. Notify the appropriate agencies at least 72 hours (excluding weekends and holidays) prior to the anticipated time for beginning underground work.

ticket number for any underground work.

UTILITY and obtain a stakeout of their respective facilities.

stakeout Administration maintained traffic signal facilities.

Stakeout the proposed construction as indicated in the Contract Documents. Allow the Engineer to verify the location of the proposed facilities.

.07 Right-of-Way and Easement Lines. Upon request, define the right-of-way and

easement lines for adjacent property owners.

.08 Subgrade, Subbase, and Base Controls. When placing subgrade, subbase, and base

courses, furnish a string line and grade with fixed controls having longitudinal and transverse spacing of no more than 25 ft. Along each form line for cement concrete pavement, provide the line and grade with fixed controls not to exceed 25 ft.

equipment guided by Global Positioning System (GPS) or Robotic Total Station (RTS) equipment may be used in the placement of subgrade, subbase, base courses, and other roadway materials. Preserve the stakeout established by the Engineer and set additional controls as directed.

Model (DTM) for review. When using the Contract Documents and Administration furnished DTM data, develop a DTM independently. The 236 — CONSTRUCTION STAKEOUT Administration and its designers shall be released from all liability for the accuracy of the data and its conformance to the Contract Documents.

project. Where project work is performed beyond the project limits, establish control points at intervals not to exceed 1000 ft. Determine the horizontal position of these points by static GPS sessions or by traverse connection from the original baseline control points. Establish the elevation of these control points using differential leveling from the project benchmarks, forming closed loops where practical. Prior to construction activities, provide a copy of all new control point information to the Engineer.

PCs and PTs, super elevation points such as begin full super and half-level plane inclined, and other critical points required for construction of structures and utility relocation or coordination. The Engineer will determine when additional stakeout and control points are necessary.

activities involving environmental agencies, utility companies, and other entities on adjacent projects or work areas.

grade tolerance is ±0.1 ft or greater.

Verify the index error of the vertical circle of the RTS and adjust as necessary prior to operations each workday. Begin and end each work session by checking between adjacent control points.

furnish a GPS Rover instrument for Administration use during the project, along with 8 hours of formal training on GPS/RTS and used systems. Provide a surveyor to perform verification when discrepancies arise.

capability, knowledge, equipment, and experience to properly operate the systems and achieve acceptable tolerances. If this ability is not satisfactorily demonstrated to the Engineer, conventional stakeout procedures shall be required.

.09 Demarcation. Demarcate as specified and as directed and preserve until no longer

applicable. When necessary and as directed, replace disturbed, damaged, destroyed, or otherwise missing demarcation. If demarcation is not re-established within 48 hours, the Engineer may proceed to demarcate. Demarcate wetland areas using 107.02.01. Demarcate LOD and other areas as specified using 107.02.02 and label as directed. Remove all demarcations when they are no longer needed. 237 — CONSTRUCTION STAKEOUT Establish tree preservation areas as specified in Section 120.

.10 Traffic Control Devices, Lighting and ITS Devices. For installation of Traffic

Control Devices, Lighting and ITS Devices, arrange a meeting with the Engineer and representatives from the Traffic Operations Division to stakeout all items indicated on the sketches, plans, and in the Special Provisions. This meeting shall occur prior to any Traffic Control Device, Lighting or ITS work.

107.04MEASUREMENT AND PAYMENT

Construction Stakeout will not be measured but will be paid for at the Contract lump sum price. The payment will be full compensation for all material, labor, equipment, tools, and incidentals necessary to complete the work. Payment of the Contract lump sum price will be prorated and paid in equal amounts on each monthly estimate. The number of months used for prorating will be the number estimated to complete the work. Replacement of control markers with undamaged control markers and replacement of missing or damaged demarcations with undamaged demarcations will be at no additional cost to the Administration. Demarcation replaced by the Engineer will be deducted from monies due under the Contract. Corrections to deficiencies in primary control points for subgrade, subbase, and base controls resulting from construction activities will be at no additional cost to the Administration.. Corrections to grade busts and all associated quantity adjustments or errors resulting from construction activities will be at no additional cost to the Administration. 238