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Los Angeles County Metropolitan Transportation Authority
I-710 Visual Impact AssessmentOverview
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The Visual Impact Assessment Process
“THE BASICS”• Define the Existing Project
Setting/Viewshed• Determine Potential Key Views• Analyze Existing Visual Resources and
Viewer Response• Evaluate Key Views using Caltrans/FHWA
Visual Assessment Criteria• Prepare Mitigation/Enhancement Measures
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Identify Existing Setting and Viewshed
• Describe visual context of the project• Define general limits (viewshed) from
where the project can be seen. • Determine locations of potential Key
Views
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Key Views
What is a Key View?Representative view point of the project.
How is a Key View selected?Based on land uses and viewer sensitivities.
Determine Potential Key View locations: Determine representative locations from where the project may be seen, as well as views from the project.
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Key View Evaluation Criteria•Home/Apartment/Mobile Home
•Highway Proximity
•Los Angeles River Proximity
•Elevated Structure
•Relocated Utilities/Electrical Lines
•Commercial/Retail
•Recreation/Park/Other Public Facilities
•Transportation (Bus/Train Stops)
•Educational Institution
•Port of Long Beach and Los Angeles
•Industrial/Warehouse
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Key View Visual Quality
• Vividness
Good Vividness Poor Vividness
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Key View Visual Quality
• Intactness
Good Intactness Poor Intactness
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Key View Visual Quality
• Unity
Good Unity Poor Unity
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Assess Viewer Response
• Viewer Sensitivity – Viewers’ Concern and Response
• Viewer Exposure – Number of Viewers and View Duration
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Key View Evaluation Matrix
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Key View Locations Map
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Preliminary Visual Simulation
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• Complete Draft Visual Impact Assessment Report (January 2010)
• Review preliminary findings and develop avoidance, minimization, mitigation, and enhancement measures – Early 2010
• Complete Final Visual Impact Assessment (Spring 2010)
• Integrate Visual Impact Assessment findings and recommendations into the Draft EIR/EIS – Summer 2010
Next Steps