4- Inadvertent Discovery Plan.pdf
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- Solicitation number
- S-KS0510-00017594
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- Oregon
About this file
This is an Archaeological Inadvertent Discovery Plan (IDP) prepared by the City of St. Helens for the Wastewater System Capacity Improvements Project. The plan establishes protocols for all contractors, subcontractors, and associated personnel working on the sanitary sewer infrastructure construction and replacement project in Basins 4 and 6. The IDP outlines discovery procedures, contact information for key project stakeholders, and mandatory notification requirements applicable to all ground-disturbing activities associated with the project. The plan designates Bill Evonuk as Project Manager (503-709-7180) and Sharon Darroux as Agency Official (503-366-8243), with Kanani Paraso serving as the contracted archaeologist (503-281-4576).
The plan requires immediate work stoppage and site protection with a 100-foot buffer zone upon discovery of any archaeological materials, including stone tools, historic artifacts, structural remains, shell middens, or human remains. All discoveries must be reported to the Project Manager, Agency Official, and Oregon State Historic Preservation Office (SHPO), with human remains requiring additional notification to Oregon State Police and appropriate Native American Tribes including the Confederated Tribes of Siletz Indians, Confederated Tribes of Grand Ronde, and Confederated Tribes of the Warm Springs Reservation of Oregon. The plan establishes strict confidentiality requirements under the National Historic Preservation Act and Oregon State law to protect vulnerable archaeological sites, with all media inquiries directed to the Agency Official and requiring interagency and tribal concurrence before any public information release. Work resumption in affected areas requires development and approval of a plan involving State Police, SHPO, the Legislative Commission on Indian Services, and appropriate tribes.
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ARCHAEOLOGICAL INADVERTENT DISCOVERY PLAN (IDP)
City of St. Helens Wastewater System Capacity Improvements
Sharon Darroux, June 2025, SHPO No.
HOW TO USE THIS DOCUMENT
Archaeology consists of the physical remains of the activities of people in the past. This IDP should be followed should any archaeological sites, objects, or human remains are found. These are protected under Federal and State laws and their disturbance can result in criminal penalties.
This document pertains to the work of the Contractor, including any and all individuals, organizations, or companies associated with the City of St. Helens Wastewater System Capacity Improvements.
WHAT MAY BE ENCOUNTERED
Archaeology can be found during any ground-disturbing activity. If encountered all excavation and work in the area MUST STOP. Archaeological objects vary and can include evidence or remnants of historic-era and precontact activities by humans. Archaeological objects can include but are not limited to:
o Stone flakes, arrowheads, stone tools, bone or wooden tools, baskets, beads.
o Historic building materials such as nails, glass, metal such as cans, barrel rings, farm implements, ceramics, bottles, marbles, beads.
o Layers of discolored earth resulting from hearth fire o Structural remains such as foundations o Shell Middens o Human skeletal remains and/or bone fragments which may be whole or fragmented.
For photographic examples of artifacts, please see Appendix A. (Human remains not included)
If there is an inadvertent discovery of any archaeological objects see procedures below.
If in doubt call it in.
DISCOVERY PROCEDURES: WHAT TO DO IF YOU FIND SOMETHING
1. Stop ALL work in the vicinity of the find
What may be encountered
•See Appendix A for examples
Discovery Procedures
•Archaeological material, or
•Human Remains Procedures
Confidentiality
•Protected by State and Federal law
2. Secure and protect area of inadvertent discovery with 30 meter/100 foot buffer—work may continue outside of this buffer
3. Notify Project Manager and Agency Official
4. Project Manager will need to contact a professional archaeologist to assess the find.
5. If archaeologist determines the find is an archaeological site or object, contact SHPO. If it is determined to not be archaeological, you may continue work.
HUMAN REMAINS PROCEDURES
1. If it is believed the find may be human remains, stop ALL work.
2. Secure and protect area of inadvertent discovery with 30 meter/100 foot buffer, then work may continue outside of this buffer with caution.
3. Cover remains from view and protect them from damage or exposure, restrict access, and leave in place until directed otherwise. Do not take photographs. Do not speak to the media.
4. Notify:
• Project Manager
• Agency Official
• Oregon State Police DO NOT CALL 911
• SHPO
• Legislative Commission on Indian Services
• Appropriate Native American Tribes
5. If the site is determined not to be a crime scene by the Oregon State Police, do not move anything! The remains will continue to be secured in place along with any associated funerary objects, and protected from weather, water runoff, and shielded from view.
6. Do not resume any work in the buffered area until a plan is developed and carried out between the State Police, SHPO, LCIS, and appropriate Native American Tribes and you are directed that work may proceed.
CONTACT INFORMATION
• Project Manager, Bill Evonuk: 503-709-7180
• Agency Official, Sharon Darroux: 503-366-8243
• Contracted Archaeologist, Kanani Paraso: 503-281-4576
• Oregon State Police, Sgt. Ryan Tague: Cell: 541-576-4393
• Oregon State Historic Preservation Office o State Archaeologist, John Pouley: 503-480-9164 o Asst. State Archaeologist, Jamie French: 503-979-7580
• LCIS: 503-986-1067
• Appropriate Tribes
• Confederated Tribes of Siletz Indians, Buddy Lane: BuddyL@ctsi.nsn.us
• Confederated Tribes of Grand Ronde, Briece Edwards: THPO@grandronde.org
• Confederated Tribes of the Warm Springs Reservation of Oregon, Robert Brunoe:
Robert.Brunoe@ctwsbnr.org
CONFIDENTIALITY
City of St. Helens Wastewater System Capacity Improvements and employees shall make their best efforts, in accordance with federal and state law, to ensure that its personnel and contractors keep the discovery confidential. The media, or any third-party member or members of the public are not to be contacted or have information regarding the discovery, and any public or media inquiry is to be reported to Agency Official. Prior to any release, the responsible agencies and Tribes shall concur on the amount of information, if any, to be released to the public.
To protect fragile, vulnerable, or threatened sites, the National Historic Preservation Act, as amended
(Section 304 [16 U.S.C. 470s-3]), and Oregon State law (ORS 192.501(11)) establishes that the location of archaeological sites, both on land and underwater, shall be confidential.
APPENDICES AND SUPPLEMENTARY MATERIALS
A. Visual reference and examples of archaeology
APPENDIX A
VISUAL REFERENCE GUIDE TO ENCOUNTERING ARCHAEOLOGY
Figure 1: Stone flakes
Figure 2: Stone tool fragments
Figure 3: Cordage
Figure 4: Shell midden
Figure 5: Historic glass artifacts
Figure 6: Historic metal artifacts
Figure 7: Historic building foundations
Figure 8: 18th Century ship
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