Scope of Work
Ground Penetrating Radar (GPR)
Project Information
The Minnesota Department of Transportation (MnDOT) is currently in need of a contract to perform non-destructive testing in various locations in the xxxxx District. The project involves performing Ground Penetrating Radar (GPR) and coring to determine the pavement layer thickness and material properties.
The results will be used by the Materials Office for determining pavement thickness/deterioration and generating future pavement design requirements for both the roadway mainline and shoulders.
Outcomes will provide information for scoping potential future projects and writing Materials
Design Recommendations for projects to be constructed between xxxx and xxxx.
The test locations are shown in the figure and table below.
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7
10
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11
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Notes:
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Priority Hwy SP Beg. RP End RP Length
(Miles)
From To GPR
ML
GPR
Shld
Comments
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Project Tasks
Task 1: GPR and Core Drilling
Collect GPR data on the mainline and/or shoulders of various roadway segments as shown in the table above (in both directions). Collect cores according to Table 230.1 of the MnDOT Pavement
Design Manual to calibrate the GPR measurements to pavement layer thickness. Also provide traffic control as needed to collect GPR and core data. Analyze the GPR data to provide: (1) bituminous, concrete, and aggregate base layer thickness, and (2) if possible condition of the pavement surface layer including stripping, moisture damage, joint/crack deterioration, etc.
Task Deliverable(s): A detailed report indicating pavement thickness, aggregate base thickness, and pavement deterioration layers (if possible) for each roadway segment. Thickness data shall be provided at intervals of 25 ft (or finer) and at every change in layer thickness of more than one inch.
Task Duration: Due by Month Day, Year.
Additional Requirements
 In general, the work and services to be provided by this contract will follow Work Type
Definition 6.10 found on web site: http://www.dot.state.mn.us/consult/prequal/worktype/Work%20Type%206.10.pdf
, incorporated herein by reference.
 Permits will not be required on State, County, or City owned property. However, notification must be given prior to commencing work.
 Clear utilities using the Gopher State One Call System, if necessary.
 Provide traffic control (including flaggers) where necessary. Traffic Control must be in accordance with the MN MUTCD and the MnDOT Lane Closure Manual.
 Use GPS in conjunction with the GPR to record GIS locations of the data. Identify locations of milepost signs or intersecting cross streets in the GPS data, to correlate the location data to field landmarks.
 All cores through existing pavement will be backfilled and patched with similar material, i.e. bituminous road, then a bituminous patch.
 Produce an electronic boring log file (Access Database) containing core thickness data for each roadway.
 Provide a digital photo of each core.
Project Costs
The Contract is not to exceed $XX,XXX. Costs will include:
 GPR survey of approximately XXX lane miles
 Pavement cores to calibrate GPR layer thickness
 Traffic control as needed
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 Data analysis and reporting
MnDOT Assistance
MnDOT will provide the following assistance to the Contractor if necessary:
 Electronic boring log file template
 XXXXXXXXXXXXX
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