Highway 12 SP , Willmar Wye Soils Borings, Soils Tests, and Reporting

Transcription

1 Highway 12 SP , Willmar Wye Soils Borings, Soils Tests, and Reporting MnDOT Contract No General Project Overview This work is located along Trunk Highway (TH) 12, on the west side of Willmar. The project entails the realignment of the Trunk Highway to accommodate the addition of track being laid to construct the western railroad bypass of Willmar. The work covered under this contract is approximately 13,900 feet (length does not include bridge fill) of new Trunk Highway including a bridge on TH 12 from approximately RP to RP The construction of the project estimate is $46.8 million with the proposed funding as follows: BNSF Railway MnDOT Kandiyohi County City of Willmar Kandiyohi/Willmar EDC Local Road Improvement Program TIGER Grant (US DOT) $16 million $17.5 million $459,000 commitment $336,000 commitment of estimated right of way costs $35,000 (for economic development) $3.77 million $10 million The project is scheduled for a fall 2017, letting with construction to begin in All work will be prepared by or under the direct supervision of a Professional Engineer registered in the State of Minnesota and highly knowledgeable in the subject matter. Contractor will invoice all work using the State s Source Type Codes as follows: A. Source Type Code 1010 for all tasks and deliverables associated with administration of the contract. B. Source Type Code 1182 for all other tasks. Section Character of Contract 1.1 General The services to be provided under this contract are for the performance of soils surveys, laboratory and field soils testing as required by the State. Soils boring logs, plotted soils profiles and cross-sections, and reports will be prepared as directed by the State s Project Manager by, or under the direct supervision of, a Professional Engineer registered in the State of Minnesota. 1.2 Soils Surveys The purpose of the survey is to define the in-situ soil, rock, ground water, existing subgrade conditions, and to identify the material types and their engineering character, to the extent necessary for the design of the most economical, uniform and stable roadway. A sufficient Page 1 of 5

2 number of tests, borings and thicknesses will be obtained to enable the State to prepare the Materials Design Recommendation (MDR), estimated quantities and contract specifications. 1.3 Laboratory and Field Testing The purpose of soils classification, field and laboratory testing, is to ascertain the nature, suitability, strength, conditions, stability, and consolidation characteristics of soils encountered. The field and laboratory testing is described in the MnDOT Pavement Design Manual, incorporated herein by reference. Soils encountered will be classified with the MnDOT Triangular Textural Classification Chart shown in the MnDOT Grading and Base Manual. The laboratory procedures must conform to those set forth in the MnDOT Lab manual. 1.4 Referenced Documents The MnDOT Pavement Design Manual is available on the web at: The MnDOT Grading and Base Manual is available on the web at: The MnDOT Lab Manual is available on the web at: Section Scope of Work 2.1 Soils Survey The soils survey is intended to provide soils and ground water information needed to provide recommendations for grading, base and surfacing for the design of the project. A soils survey will be performed and reported in accordance with the MnDOT Pavement Design Manual as amended by this document. The Contractor will be provided with a preliminary geometric layout and grade line. Soils borings will be required on approximately 11,000 feet of new highway mainline. Borings will also be required for approximately 2400 feet of roadway at the intersection of CSAH 55 and1st Avenue NE, 1000 feet on 45 th Street, and 1000 at the connection of old TH 12 and CSAH 55. Bridge fills will not be part of this contract for the reason that they will be obtained by the MnDOT Foundations Unit. A. Soil borings taken in saturated, organic or thin layered soils will be pulled dead instead of being augered to the surface. The augered method is acceptable in most other situations. However, no more than 2.5 feet of material will be brought to the surface at one time. B. The ground water level will be measured and recorded in all borings. The Contractor will measure any water level immediately after completion of a boring. Subsequent measurements will be made after a minimum of 2 hours in order to obtain water table readings. All open test holes will be temporarily covered, identified with proper warning devices, and/or protected so that they are not hazardous. All water measurements will be noted on the field boring log and will include the date, time including subsequent measurements, depth of hole, condition of hole, method of measurement and other pertinent information. Page 2 of 5

3 C. All test holes will be backfilled in such a manner as to insure against subsequent settlement of the backfill resulting in a hole hazardous to persons, animals or equipment. Upon completion of the field investigation work, all surplus material, temporary structures and debris resulting from work will be removed and the premises left in a neat, orderly condition. Any improvements disturbed during boring operations will be restored in kind and character existing before the work started. All restoration work will be the responsibility of the Contractor and must be completed prior to the expiration of the contract. D. Right of entry to affected properties will be obtained by the State prior to contract execution. Contractor will notify property owners by mail prior to entry onto properties. Any permit fees and/or railroad charges, such as for flagging, will be the responsibility of the Contractor. E. Traffic Control. The Contractor will furnish necessary flagmen and traffic control devices to ensure safety of the traveling public. The Contractor will notify the State s Project Manager of their intent to implement a traffic control operation at least two weeks prior to implementation. The Contractor will follow the procedures required by the MnDOT Permits Section and the Manual on Uniform Traffic Control Devices (including Appendix B). F. An electronic copy of the final boring logs will be submitted to the State s Project Manager (see Section 3.1 below). 2.3 Laboratory Soils Testing A. The Contractor will be required to perform five (see B below) laboratory soils tests for the project. Four of these tests will be sampled from the new TH 12 alignment. The laboratory tests will be used to verify the accuracy of field classifications. It will be the responsibility of the Contractor to provide the test results to the State s Project Manager in a timely manner. B. Laboratory tests that are required are: 1. Course aggregate sieve analysis, 2. Fine aggregate sieve analysis, 3. Particle size (percent sand, silt and clay), 4. R-value, and 5. Organic content. The laboratory procedures will conform to those set forth in the MnDOT Laboratory Manual. 2.4 Hazardous Substances A. The State does not anticipate that the project work will encounter hazardous materials. If hazardous material sites are encountered within the project, the State will require a separate contract for the survey, identification, extent and possible cleanup methods. The contract will be administered through the MnDOT Office of Environmental Services. B. If a previously unidentified or hazardous substance is encountered during what was thought to be a routine exploration, the drilling will be immediately stopped, the State s project Manager must be notified, and the MnDOT Environmental Services Unit contacted for instructions. Page 3 of 5

4 Section Reports and Records 3.1 General The Contractor will be required to submit a written report for the Soils Survey and analysis performed under this contract. A. All reports and information submitted will be the property of the State and retained by the State. B. Soils boring logs, plotted soils profiles and cross-sections, and reports prepared in accordance herewith will be prepared by, or under the direct supervision, of a Professional Engineer registered in the State of Minnesota and said items will be certified by the Contractor s engineer as required by law. C. The Contractor s final report to the State s Project Manager will include a letter which contains: project reference, a summary description of the soils engineering performed, the number of borings taken, a brief description of the soils and ground water conditions encountered, a table of samples taken which includes both field and laboratory identification. The report will also include soil boring logs which are plotted on plan view, profiles and crosssections. The borings will be identified with a number. The Contractor will also submit all other pertinent information and test results gathered during their investigation. D. In addition, the contractor will provide data from the field boring logs in accordance with the following: I. Soil boring information will be collected using Trimble G.P.S. and MnDOT s Soils Data Dictionary, incorporated herein by reference. The Soils Data Dictionary is a list of questions (borehole location, strata (material info), water depths, and refusal depths) that is used to collect soils strata information using a Trimble data collector. Abbreviations for soils terms, as defined in Table of the MnDOT Pavement Design Manual Section 220, are built into the Soils Data Dictionary. II. Data from the data collector will be uploaded to computer by using Trimble s Pathfinder Office software. Output files (.ssf), will be given to the State s Project Manager (no more than one file per two week period) and within 10 working days. III. The Contractor will provide the State s Project Manager one G.P.S. output file (.ssf) per day for the first week to verify that the files are in compliance with MnDOT standards. Section Contract Tasks and Deliverables (time requirement as appropriate) 4.1 Contractor Tasks and Deliverables A. Project Management. Contractor will provide Project Management, including; invoicing, meetings, communication and tasks required to assure successful management and administration of the project. *Source Type Code 1010 Page 4 of 5

5 B. Soil boring field work results and locations, as described in Sections 1.0 and 2.0 above. C. Soils testing and results, as described in Sections 1.0 and 2.0 above. D. Draft version of the Final Report, as described in Section 3.0 above. (December 15, 2016) E. Final Report. (January 25, 2017) F. Traffic Control. The Contractor will furnish necessary flagmen and traffic control devices to ensure safety of the traveling public. The Contractor will notify the State s Project Manager of their intent to implement a traffic control operation at least two weeks prior to said implementation. The Contractor will follow the procedures required by the MnDOT Permits Section and the Manual on Uniform Traffic Control Devices (including Appendix B).. G. Survey Line. The Contractor will be responsible to provide surveying, if needed, to establish line or base line from which to work. H. Meetings. The Contractor will meet and confer with the State as is necessary in regard to project management and work done under this contract, and travel as necessary for such meetings. The State anticipates no more than three (3) meetings that will require the Contractor s presence at the MnDOT office at Willmar. If the Contractor s work results in the need for communications with project area stakeholders (businesses, agencies, land owners, utilities) the Contractor will assist the State in discussions as directed by the State s Project Manager. 4.2 State s Tasks and Deliverables A. The Contractor will analyze all data and information furnished by the State. If any data or information is found to be incorrect or incomplete, the Contractor will bring the facts to the attention of the State before proceeding further with that part of the project. The State will investigate the matter, and if it finds that reported incorrectness or incompleteness exists, it will promptly furnish corrected data or information. Delay in furnished data will not be considered justification for an adjustment in compensation. B. The State will provide a list of names and addresses for landowners adjacent to the project area, to be used for establishing property access for soil borings. C. The State will furnish maps, plans, a preliminary geometric layout, topographic maps, reports and any other data in possession of the State, requested by the Contractor and having a bearing on the study. (at Notice to Proceed) D. Duly authorized representatives of the State will have the right to inspect the work and facilities of the Contractor on a routine basis or whenever it is deemed necessary. E. All data furnished to the Contractor by the State will remain the property of the State and will be returned to the State when so requested. Page 5 of 5