Draft Exploration Plan - Checklist Reference Document~1.pdf
PDF 2 MB Posted
- Attached to
- ER Geotechnical Drilling and Sampling Rebid
- Solicitation number
- S-73000-00016742
- Issued by
- Jackson County, Oregon
About this file
This is a Draft Exploration Plan Checklist Reference Document prepared by Jackson County, Oregon for the 2025 Emergency Response (ER) Landslides project along Highway 227. The project encompasses three geotechnical drilling and sampling locations at milepost markers 43.1, 44.1, and 44.7, with each location requiring three drill holes to depths of approximately 60 feet each, totaling 180 feet per location and 20 feet of coring per hole. The work involves HQ3 coring, hollow stem auger (HSA) drilling using tracked or truck-mounted equipment, and Standard Penetration Testing (SPT) at 2.5-foot intervals. Anticipated subsurface conditions consist of asphalt and dirt layers. Each drill hole location will require installation of slope inclinometers and vibrating wire transducers (VWT) for instrumentation purposes. The anticipated drilling duration is 4 to 5 days per location, with a total estimated completion timeframe determined by mobilization efficiency. The anticipated start date is to be determined (TBD), and erosion control requirements, utility locate tickets, environmental clearance status, site access arrangements, right-of-way documentation, staging areas, and traffic control plans are noted as pending or under review by Jessica Bochart.
The exploration plan document includes GPS coordinates for each drill site, scaled maps at varying magnifications (1:4,800, 1:960, and 1:200 scales), and access road designations. The project is identified under Environmental Assessment Number ERADMF25000 and filed under County Jackson\OR227 Tiller-Trail directory. Special sampling methods such as Shelby Tubes are not anticipated for this work. Environmental clearance requests have been submitted to the responsible environmental clearance (REC) authority, with final clearance status and any environmental restrictions remaining to be confirmed. Additional details regarding utility location coordination, erosion control specifications, right-of-way agreements, and comprehensive traffic control protocols are to be finalized prior to drilling operations commencement.
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Text version
GPS
42.753564, -122.870386
1000 ft
N
N © 2026 Google
© 2026 Google
© 2026 Google
Image © 2026 Airbus
Image © 2026 Airbus
Image © 2026 Airbus
DH-01 DH-02
DH-03
HWYE33L
Oval
HWYE33L
Oval
HWYE33L
Oval
HWYE33L
Text Box HWY 227 MP43.1 Tiller Trail Highway Exploration Plan 2/9/2026
Hwy 227 MP 43.1
February 9, 2026
² 0 0.08 0.160.04 mi
0 0.1 0.20.05 km
1:4,800
IMPORTANT NOTICE:
This product is for informational purposes and may not have been prepared for, or be suitable for legal, engineering, or surveying purposes. Users of this information should review or consult the primary data and information sources to ascertain the usability of the information.
DH-01 DH-02
DH-03
Access Road
HWYE33L
Oval
HWYE33L
Oval
HWYE33L
Oval
HWYE33L
Underline
HWYE33L
Polygonal Line
HWYE33L
Line
Project Location: HWY 227 MP 43.1
County: Jackson
Key No.: N/A
EA No.: ERADMF25000
Project File Location: County Jackson\OR227 Tiller-Trail 2025 ER Landslides
Project Description: Emergency Response Landslide
Number of Drillholes and Depths: 3
Estimated Footage: 60 ft ea., total 180 feet, 20 feet of coring
Anticipated Subsurface Conditions: Asphalt and Dirt
Anticipated Drill Methods: HQ3 coring, HSA, tracked or Truck, SPT 2.5’ intervals
Special Sampling (Shelby Tubes, etc.): Not expected
Instrumentation/Installation: 3 slope inclinometers and 1 VWT per Drill Hole
Anticipated Start Date: TBD
Anticipated # of Days to Drill: 4-5 days
Erosion Control Required: TBD
Utility Locate Ticket Numbers, submitted by?:
Environmental Clearance Requests Submitted to REC?:
Jessica Bochart
Environmental Clearance Obtained?:
Environmental Restrictions?:
Site Access, R/W, Staging Area:
Traffic Control Plan:
GPS Location
42.747164 , -122.865716
1000 ft
N
N © 2026 Google
© 2026 Google
© 2026 Google
Image © 2026 Airbus
Image © 2026 Airbus
Image © 2026 Airbus
DH-02DH-01
DH-03
HWYE33L
Text Box HWY 227 MP44.1 Tiller Trail Highway Exploration Plan 2/9/2026
HWYE33L
Oval
HWYE33L
Oval
Oval
HWY 227 MP 44.1 Tiller Trail Highway Exploration Plan
February 6, 2026
² 0 0.015 0.030.0075 mi
0 0.025 0.050.0125 km
1:960
IMPORTANT NOTICE:
This product is for informational purposes and may not have been prepared for, or be suitable for legal, engineering, or surveying purposes. Users of this information should review or consult the primary data and information sources to ascertain the usability of the information.
DH-02DH-01
DH-03
Access Road
HWYE33L
Oval
HWYE33L
Oval
HWYE33L
Oval
HWYE33L
Polygonal Line
Project Location: HWY 227 MP 44.1
Key No.: N/A
EA No.: ERADMF25000
Project File Location: County Jackson\OR227 Tiller-Trail 2025 ER Landslides
Project Description: Emergency Response Landslide
Number of Drillholes and Depths: 3
Estimated Footage: 60 ft each, total 180 feet, 20 feet each of coring
Anticipated Subsurface Conditions: Asphalt and Dirt
Anticipated Drill Methods: HQ3 coring, HSA, tracked or Truck, SPT 2.5’ intervals
Special Sampling (Shelby Tubes, etc.): Not expected
Instrumentation/Installation: 2 slope inclinometers and 1 VWT in each SI
Anticipated Start Date: TBD
Anticipated # of Days to Drill: 4-5 days
Erosion Control Required: TBD
Utility Locate Ticket Numbers, submitted by?:
Environmental Clearance Requests Submitted to REC?:
Jessica Bochart
Environmental Clearance Obtained?:
Environmental Restrictions?:
GPS
42.739403, -122.863553
1000 ft
N
N Image © 2026 Airbus
Image © 2026 Airbus
Image © 2026 Airbus
DH-01
DH-02
DH-03
HWYE33L
Oval
HWYE33L
Oval
HWYE33L
Oval
HWYE33L
Text Box HWY 227 MP 44.7 Tiller Trail Highway Exploration Plan 2/9/2026
HWY 227 MP 44.7
February 9, 2026
² 0 0.02 0.040.01 mi
0 0.03 0.060.015 km
1:1,200
IMPORTANT NOTICE:
This product is for informational purposes and may not have been prepared for, or be suitable for legal, engineering, or surveying purposes. Users of this information should review or consult the primary data and information sources to ascertain the usability of the information.
DH-01 DH-02
DH-03
Access Roads
HWYE33L
Oval
HWYE33L
Oval
HWYE33L
Oval
HWYE33L
Polygonal Line
HWYE33L
Line
HWYE33L
Line
Project Location: HWY 227 MP 44.7
Key No.: N/A
EA No.: ERADMF25000
Project File Location: County Jackson\OR227 Tiller-Trail 2025 ER Landslides
Project Description: Emergency Response Landslide
Number of Drillholes and Depths: 3
Estimated Footage: 60 ft each, total 180 feet, 20 feet each of coring
Anticipated Subsurface Conditions: Asphalt and Dirt
Anticipated Drill Methods: HQ3 coring, HSA, tracked or Truck, SPT 2.5’ intervals
Special Sampling (Shelby Tubes, etc.): Not expected
Instrumentation/Installation: 3 slope inclinometers and 1 VWT per Drill Hole
Anticipated Start Date: TBD
Anticipated # of Days to Drill: 4-5 days
Erosion Control Required: TBD
Utility Locate Ticket Numbers, submitted by?:
Environmental Clearance Requests Submitted to REC?:
Jessica Bochart
Environmental Clearance Obtained?:
Environmental Restrictions?:
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