3d technology and the section 106 process matt diederich archaeologist oregon state historic...
TRANSCRIPT
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3D Technology and the Section 106 Process
Matt DiederichArchaeologist
Oregon State Historic Preservation Office (SHPO)Oregon Heritage Programs Division
ODOT Environmental ConferenceEugene, OregonApril 22, 2015
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Regulatory Overview (Boring!)
• Federal Laws- Section 106 of the NHPA. Applicable on federal and Tribal lands as well as any project with a federal nexus (i.e., federal permit, federal funding, federal agency involvement)
• State Laws- applicable on all non-federal public (e.g., city, county, state) and private lands. These laws also apply when there is a federal nexus.
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Section 106 Process
On historic properties, anyway.
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The Section 106 Process, Really…
The Short Version: Typical Section 106 compliance process
1. Determine the Area of Potential Effect
2. Identify properties over 50 years old
3. Evaluate integrity4. Evaluate NRHP-eligibility5. Determine Effects6. Avoid or mitigate adverse
effects (if any)
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Identify properties over 50 years old
• Conducting background research to determine if properties are present.- Check the SHPO Datatbase for previously recorded sites.
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Check historic maps and documents.
Identify properties over 50 years old
1867 GLO Map
1907 Sanborn Fire Insurance Map
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Survey the APE
Thick ground cover and rough terrain can limit the archaeologists’ ability to locate sites.
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Evaluate integrity and NRHP-eligibility
• Criterion A: Association with significant historical events or with the broad patterns of history.
• Criterion B: Association with the life of a person of historical significance.
• Criterion C: Embody the distinctive characteristics of a type, period, or method of construction, or that
represent the work of a master, or that possess high artistic values, or that represent a significant and distinguishable entity whose components may lack individual distinction.
• Criterion D: Likely to provide or has provided important information about the past.
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Applying Criteria to Archaeological Sites
• Identify Boundaries
• Site Composition
• Site Integrity
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Evaluate Effects
• There are three kinds of effect determination:– No Effect – either the property is not eligible, or it
is eligible, but will not be affected in any way.
– No Adverse Effect – the property is eligible, but the project as scoped will not affect the ability of the property to convey its historical significance.
– Adverse Effect – the property is eligible, and the project as scoped WILL affect the ability of the property to convey its historical significance.
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Where does 3D Technology fit, you ask?
• There are many different forms of 3D technology, Today we’re focusing on only one.– LiDAR- Laser Illuminated Detection And Ranging
3D Homer, not 3D Tech
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Lasers!?!
Not these kinds of lasers(Dang!)
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These kinds of Lasers• Fast and accurate
remote sensing for digital elevation model
• Laser pule fired at surface from aerial platform measures distance to ground.
• Point cloud data set is generated.
• Laser pulse reflects from objects on and above ground surface.
• Pulse also finds gaps and holes allowing it to “see through” vegetation.
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Where does LiDAR fit in the 106 Process?
The Short Version: Typical Section 106 compliance process
1. Determine the Area of Potential Effect2. Identify properties over 50 years old3. Evaluate integrity4. Evaluate NRHP-eligibility5. Determine Effects6. Avoid or mitigate adverse effects (if any)
Let’s look at an agency that uses LiDAR to help with their 106 responsibilities. The Medford District, BLM
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Determining APE
BLM slides used with permission
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Identifying properties during background research
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Identifying and Evaluating
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Evaluation and Interpretation
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Uses Outside of Section 106, but important for Resource Management
• Section 110 Responsibilities.– Section 110 requires agencies assume
responsibility for historic properties
• Identification of Hazard Features.• Determine if plan of action for
hazardous features.
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Hazard Feature Identification
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Mitigation of Adverse Effects
I’ll leave that to the guys that actually did it.