Subsurface Explorations. Subsurface conditions throughout the site may vary from those depicted on logs of discrete borings, test pits, or other exploratory services. Client understands Consultant’s layout of boring and test locations is approximate and that Consultant may deviate a reasonable distance from those locations. Consultant will take reasonable precautions to reduce damage to the site when performing Services; however, Client accepts that invasive services such as drilling or sampling may damage or alter the site. Site restoration is not provided unless specifically included in the Services.
Subsurface Explorations. Subsurface conditions throughout the site may vary from those depicted on logs of discrete borings, test pits, or other exploratory services. CLIENT understands RK’s layout of boring and test locations is approximate and that RK may deviate a reasonable distance from those locations. RK will take reasonable precautions to reduce damage to the site when performing services; however, CLIENT accepts that invasive services such as drilling, or sampling may damage or alter the site. Site restoration is not provided unless specifically included in the scope of services.
Subsurface Explorations. Where applicable, reference is made in the technical specifications for identification of those reports of explorations and tests of subsurface conditions at the site that have been utilized by CONSULTANT in preparation of the Contract Documents.
Subsurface Explorations. KVE will take reasonable precautions to reduce damage to the site when performing Services; however, Client accepts that invasive services such as drilling or sampling may damage or alter the site. Site restoration is not provided unless specifically included in the Services.
Subsurface Explorations. The A-E shall perform the following subsurface exploration consisting of the following:
Subsurface Explorations. This task involves the following: 🢭 Xxxx proposed exploration locations in the field and complete public utility locates 🢭 Drilling four borings through the roadway or adjacent to the roadway near each corner of the proposed bridge to depths up to 40 to 50 feet below grade, or until 15 feet of relatively competent materials are penetrated, whichever is deeper, to characterize subsurface soil and groundwater conditions at the abutments. The maximum depth of borings will be 50 feet. 🢭 Using hand auger or handheld geoprobe, conduct up to four explorations within the stream channel and two explorations on the bank of the stream These explorations will characterize the subsurface streambed material. 🢭 Obtain two surface streambed samples and conduct a sieve analysis to determine the gradation of the material. Collect one sample 200 feet upstream of the existing bridge and one 200 feet downstream. 🢭 Maintaining a log of the soils encountered in the borings and collecting soil samples for laboratory testing. 🢭 Backfilling the exploration holes in accordance with Ecology regulations and patching the surface with asphalt or gravel. 🢭 Collecting and hauling all soil spoils from the site. Assumptions ▪ If needed, the County will provide street use or right-of-way permits at no charge. ▪ Disposal of contaminated soil and decontamination of drilling equipment are not included in this scope of work. If contaminated materials are encountered, then additional costs will be incurred. ▪ Prevailing wages will apply to subcontractors (e.g. driller and traffic control). ▪ Field explorations and testing will be completed in 3 workdays, two days for drilling and one for hand augers and/or geoprobes. ▪ County survey staff will survey the borehole locations and add them to the site base map. ▪ Infiltration testing will not be necessary because stormwater quality and flow control facilities will not be required. Deliverables ▪ Preliminary copies of the boring logs.
Subsurface Explorations. A. Whenever, in opinion of the OWNER, it is necessary to explore and excavate to determine the location of existing underground structures, the CONTRACTOR shall make explorations and excavations for such purposes. If the CONTRACTOR is required to perform additional work in making the explorations and excavations, extra compensation will be allowed for such additional work.
Subsurface Explorations. A. The ENGINEER shall use all existing subsurface and soil information wherever possible and shall perform additional subsurface explorations and conduct related office work as necessary for the preparation of the final design and contract drawings for the project.
Subsurface Explorations. This task includes coordination, preparation, and on-site inspection of subsurface explorations and instrument installation. We have assumed one boring would be drilled below the Irving Avenue 00000 XX Xxxxxxxxx Road, Suite 111 | Portland | OR 97223 Page | 1 of 3 Main (000) 000-0000 | XxxxxxxxxXxxxxxxxxxx.xxx Proposal for Geotechnical Investigation Services Irving Avenue Bridge Landslide 2784 Bridge to a depth of 60 feet. Due to access constraints, it is anticipated that drill equipment will need to be hand carried to the drill location. Subsurface samples would be collected to characterize the materials. The boring would be instrumented with a slope inclinometer to allow for monitoring of landslide deformation. Task 2 – Instrument Monitoring The slope inclinometer installed in the exploratory boring will be initialized following installation and grouting. It is anticipated that monitoring of the inclinometer will be performed every two months through May 2020. For purposes of this estimate, we have assumed four sets of inclinometer readings (including initialization visit). Task 3 – Laboratory Testing Laboratory testing would consist of water content determinations and visual classification of subsurface materials on all collected samples in our laboratory to support field classification and summary boring log development. Samples would be preserved, to allow for additional tests in subsequent phases if required.
Subsurface Explorations. When the Authority is excavating test pits, the Consultant will be on-site to observe the ground conditions and locate any potential voids or fractures in the soil and rock. Following test pit observations, the Consultant will engage a drilling contractor to drill two test borings in the area of the planned by-pass piping. The drilling contractor will contact the underground utility location service and work with the Authority’s personnel so that the boring locations do not interfere with the locations of underground utilities. Drilling contractor will use a truck-mounted drill and hollow stem augers to advance the borings and will collect split spoon soil samples continuously to the top of rock following ASTM D 1586. EDI will collect rock cores from the top of rock to approximate El. 565 (about 5 feet below the elevation of Xxxxx Creek). During coring, we will work with drilling contractor to identify zones where the drilling rods drop or face little resistance which could indicate the presence of soil zones or voids in the rock. Drilling contractor will construct standpipe piezometers in the borings to allow us to measure the elevation of groundwater following completion of the borings. This information will provide data on the flow of groundwater from the site toward Xxxxx Creek. The drilling contractor’s geologist will observe the conditions in the borings and will prepare boring logs. Consultant will monitor the completion of the borings full-time to review the conditions and adjust the scope, if conditions necessitate. Consultant will also visit the site following completion of the borings to measure water levels in the piezometers and to complete a slug test in the piezometers to measure the hydraulic conductivity of the formation surrounding the well screen. The Consultant will ship selected soil samples to a geotechnical testing laboratory to test the soils for gradation and Atterberg Limits (if clayey). This will provide information regarding the potential for the soils to erode when subject to groundwater flow.
