Geotechnical Exploration. The Lessee may only conduct geotechnical exploration activities performed in support of plan (i.e., SAP and/or COP) submittal in locations where an analysis of the results of geophysical surveys has been completed. This analysis must include a determination by a Qualified Marine Archaeologist as to whether any potential archaeological resources are present in the area. Except as allowed by the Lessor under 4.2.6, the geotechnical exploration activities must avoid potential archaeological resources by a minimum of 50 meters (164 feet), and the avoidance distance must be calculated from the maximum discernible extent of the archaeological resource. A Qualified Marine Archaeologist must certify, in the Lessee’s archaeological reports, that geotechnical exploration activities did not impact potential historic properties identified as a result of the HRG surveys performed in support of plan submittal, except as follows: in the event that the geotechnical exploration activities did impact potential historic properties identified in the archaeological surveys without the Lessor’s prior approval, the Lessee and the Qualified Marine Archaeologist who prepared the report must instead provide a statement documenting the extent of these impacts.
Geotechnical Exploration. 4.3.4.1 The Lessee may only conduct geotechnical exploration activities in support of plan submittal in locations where an archaeological analysis of the results of geophysical surveys has been completed. This analysis must include a determination by a Qualified Marine Archaeologist as to whether any potential archaeological resources are present in the area that could be impacted by bottom- disturbing activities.
4.3.4.2 Except as allowed by the Lessor under 4.3.6, the geotechnical exploration activities must avoid potential archaeological resources by a minimum of 50 meters, and the Qualified Marine Archaeologist must calculate the avoidance distance from the maximum discernible extent of the archaeological resource.
4.3.4.3 Upon completion of geotechnical exploration activities, a Qualified Marine Archaeologist must certify, in the Lessee’s archaeological report(s) submitted with a plan, that such activities did not impact potential historic properties identified as a result of the HRG surveys performed in support of plan submittal, except as follows: in the event that the geotechnical exploration activities did impact potential historic properties identified in the archaeological surveys without the Lessor’s prior approval, the Lessee and the Qualified Marine Archaeologist who prepared the report must instead provide a statement documenting the extent of these impacts.
Geotechnical Exploration. After the Preliminary Engineering Report identifies, and the SAIG approves the preferred alternative, geotechnical field exploration shall be performed to evaluate subsurface conditions and develop geotechnical recommendations for sewer installation including irrigation canal and railway crossings using trenchless, horizontal drilling technology. Geotechnical exploration tasks will include: Prepare exploration and testing work plan, including traffic control and health & safety plans; Field locate and establish exploration coordinates; Drill, log, core and sample six boreholes to depths of 20 feet; Perform geotechnical laboratory analyses of soil and rock samples in accordance with standard ASTM methods; Geotechnical engineering analysis and evaluation of trenchless technology applicability; Prepare Draft Geotechnical Exploration Report for city and design team review and comment; Respond, resolve and incorporate comments into Final Geotechnical Exploration Report.
Geotechnical Exploration. Conduct a site walk during mobilization of the initial phase of exploration described below to confirm the scope of work. To characterize the geological materials below the percolation ponds, a series of geotechnical borings, test pits and cone penetrating test (“CPT”) soundings will be advanced for the project. This work will be contracted by Yeh under a separate contract. It is anticipated that the City will provide a backhoe and operator for the test pits. The exploration work will include logging of test pits to depths up to ten feet below ground surface (“bgs”), advancing soil borings to an approximate total depth of thirty feet bgs, and performing CPT soundings to thirty feet bgs. The number of bores will likely range from six to twelve and will be supplemented with a similar number of test pits and up to thirty CPT soundings depending on the project goals percolation pond accessibility. A geologist/engineer will describe the geologic materials from the borings and test pits. The geologist/engineer will collect undisturbed soil samples for analyses of physical properties including permeability. The soil physical properties and hydraulic (permeability) analyses will be completed at the California Polytechnic State University (Cal Poly) Geotechnical Engineering Laboratory in San Xxxx Obispo and Yeh Laboratory in Xxxxxx Beach. Upon receipt of laboratory analyses results, a data report will be generated to present the distribution of geological materials and the results of the laboratory analyses of these materials. Deliverables: Draft and Final Data Report, in electronic format (PDF).
Geotechnical Exploration. The COUNTY agrees to provide the following information and services to the
1. Horizontal and vertical control points for any survey work including bench marks, ties to land corners, and other control points as deemed necessary by the ENGINEER.
2. Limits of existing County owned ROW and Permanent Easements at the existing bridge site (see Exhibit “B” attached).
3. As-built plans of the existing bridge, including the log of borings.
4. Scour mitigation plans of work previously performed at the existing bridge site.
5. Historical photo documentation.
6. Historical scour assessments.
7. Removal of snow, fences or other access restrictions. The ENGINEER agrees to provide the following services generally described, but not necessarily limited to those services described hereinafter:
1. Project preparation services consisting of:
a) A plan of the boring location with ground surface elevations at the borings will be determined.
b) Prior to drilling the soil boring locations will be staked in the field by the
c) Area underground utility service representatives will be contacted by the ENGINEER through the One-Call system to xxxx area public utilities in order to remove conflicts between drilling and utilities in accordance with State law.
d) Site characteristics will be noted and the boring locations adjusted as necessary.
(1) The drill truck cannot work on very steep ground, on soft ground, near buried utilities, immediately along roadway barriers, or near overhead power lines and trees.
e) Proper barricades will be placed around the boring locations in accordance with public safety requirements and the most current edition of the “Manual on Uniform Traffic Control Devices” prior to and during boring advancement.
2. The ENGINEER will obtain subsoil data through:
a) Using a truck-mounted drilling and sampling rig, the ENGINEER will advance four borings, two borings to the west and two borings to the east of the channel, within the south roadway ditch.
(1) All boring samples shall be taken in a manner to minimize damage to area ground surfaces from rutting
b) Borings will not be advanced to bedrock, but to a sufficient depth for proper slope stability analyses.
(1) The borings nearest the creek channel will be advanced to a depth of 40 feet.
(2) The other two borings will be advanced to a depth of 35 feet at a distances of about 100 to 150 feet from the channel.
(3) A total of 150 lineal feet of soil sample boring will be advanced.
(4) The ENGINEER will obtain four ...
Geotechnical Exploration. The Consultant will obtain Santa Xxxxx Valley Water District (SCVWD) drilling and encroachment permits prior to performing our field exploration. Two cone penetration test (CPT) probes will be advanced to depths of up to approximately 60 feet in locations near the north and south bridge abutments. The empirical data will be reviewed in the field and a direct push probe will be advanced adjacent to each CPT probe to collect soil samples at selected depths as needed. Soil samples will be taken for visual classification and laboratory testing. Resulting holes will be backfilled in accordance with Santa Xxxxx Valley Water District (SCVWD) requirements. Soil samples will be re-examined in the laboratory to verify field classifications and will be tested for moisture content, Plasticity Index, gradation, corrosion, and other physical properties as appropriate. Based on the geological and geotechnical data gathered, a geotechnical exploration report will be prepared, to address the following: • Suitability of the site for the proposed pedestrian bridge. • Physical properties of the typical soils encountered. • Assessment of geological/ geotechnical hazards at the subject site, including compressible soils and l iquefiable soils, as appropriate. • Foundation recommendations for the bridge abutments. • Caltrans ARS curves. • L- pile input information and group effect considerations. • Recommendations for wing wall design.
Geotechnical Exploration. The Geotechnical engineer will obtain soil samples in the field. The final number and location of geotechnical borings will be determined on site by the geotechnical engineer. Care will be taken to minimize damage to property during the geotechnical exploration. Any damage will be restored to the pre‐exploration condition by the geotechnical engineer. Boring holes will be backfilled with cutting, clay, plugs and/or other material as determined by the geotechnical engineer. Boring locations will be illustrated in the geotechnical report.
