157Construction Layout and Monuments

157.01 Description

This Section describes the requirements for surveying and providing lines, grades, elevations, and reference marks as necessary to construct the elements of construction. Thi s Section also describes the requirements for constructing monuments and monument boxes.

157.02 Materials

Provide materials as specified: Sand ................................ ................................ ................................ ................................ ........................ 901.06.02 Concrete ................................ ................................ ................................ ................................ ....................... 903.03 Reinforcement Steel ................................ ................................ ................................ ................................ ...... 905.01 Provide monument markers according to ASTM B 19 and monument boxes according to AASHTO M 105, Class 20A or 20B.

157.03 Procedure

157.03.01 Construction Layout

Perform a site investigation within the Project Limits to locate existing property markers and monuments. Protect property markers and monuments from disturbance and destruction. Notify the RE of the location of property markers and monuments that are in danger of being removed or disturbed. Do not remove or disturb existing property markers and monuments until obtaining RE approval. Before removing a monument that is not owned by the Department, notify the agency to which the monument belongs of the need to remove the monument. Provide the RE with copies of correspondence with the agency, as well as the agency’s written requirements or guidelines for setting monuments. If a monument or marker is disturbed or removed without RE approval, the Contractor is responsible for reimbursing the Department for the cost to replace the monument. Perform layout for the construction of the Contract using the control points and data shown on the Plans. Perform layout under the direct supervision of a land surveyor. Preserve control points throughout the du ration of the Project. Reset control points that are damaged, lost, displaced, or removed. Before beginning construction operations, verify the vertical and horizontal controls provided in the Plans using, at a minimum, third-order, Class I accuracy procedural standards and equipment. Notify the RE in writing of discrepancies or errors and obtain resolution before proceeding with the work. Upon request, provide the RE with survey notes and calculations related to the field control verification. Before beginning construction operations, establish lines for ROW, easement, and other restrictions, such as boundaries for environmentally sensitive areas to define the limits of construction and temporary operations. Establish limits of tree of protection for trees and other vegetation to be preserved. Do not encroach on private property, except as allowed by easements. Document existing site conditions, including vegetation, in areas to be used for excavation, temporary construction, storage, parking, movement of equipment, field office, and etc. which will have to be later restored to pre - existing conditions. Provide documentation, including photographs, to the RE. Provide the Utilities with the layout needed to install relocated utility facilities and coordinate the Work . Ensure that relocated facilities do not conflict with proposed construction, including High Voltage Proximity Act conflicts. Establish the exact location of the Work from the control points. Reference the Work to baselines that are established from the control points. Maintain baselines until Completion. Provide and maintain offset baseline stakes for roadways, ramps, jughandles, or turnarounds outside the limits of grading and construction. Set offset stakes at a maximum interval spacing of 50 feet. Where baselines have a radius of less than 475 feet, provide offset stakes at a maximum interval spacing of 25 feet. Identify and mark each stake to show the offset distance from the baseline, and provide grade sheets to the RE showing the c ut or fill to the finished profile lines with reference to the offset stakes. Provide grade sheets for construction of subbase that include calculations to establish the typical cross section from the profile grade stake. Provide adequate and accurate of fset lines during construction that requires occupation of the baseline points by construction operations. Provide the RE with assistance as requested for verification of lines, grades, boundaries, dimensions, and elevations. Construct the Work to the dimensions and tolerances noted within the Contract. Except where otherwise noted, construct subbase, base courses, pavements and structures to within 1/4 inch of the elevations, stations and offsets noted in the Contract. If work does not conform to the to lerances allowed, the Department may consider the work to not be in conformance with the work as specified in 105.03. For each bridge and sign structure within the Project Limits, provide the RE as -built measurements of the vertical under clearance at each lane line, shoulder line, curb line and edge of pavement line under a structure to the nearest inch. For each bridge structure, provide vertical under clearance measurements at each fascia beam. Upon request, provide the RE with survey notes and calculations related to the alignment and horizontal and vertical control, and field notes to document the ROW, including easements and monument locations. Maintain survey notes in a bound field notebook in a professional manner. If the Department discovers survey errors, the Department will deduct the costs of checking and correcting these errors from any money due to the Contractor.