Scope Seismic Retrofit of Building Replacement of three, 40 MW Generating Units Replacement of all Mechanical and Electrical Systems Rehabilitation of Tunnels Regrading Abutment Slope/Road Relocation Intake Gates/Draft Tube Gate Addition Architectural Upgrades and Finishes

Challenges Old Facility with Poor Construction Documentation Confined and Cramped Powerhouse Operating Powerplant During Construction - Phased Construction 3D Visual Design Aids 3D Survey –High Definition Survey (Laser Scan) of Powerhouse –TruView – Overlay 3D Point Cloud on Panoramic photo - identify points/ measure distances. 3D Design –REVIT – 3D Design and Building Information Modeling (BIM) for Powerhouse M&E Design –Navisworks - Clash Detection –Civil 3D –Autodesk 360 – Cloud Rendering

High Definition Survey (HDS) - Laser Scan Triad Associates (Kirkland, WA) – 4 Man Crew Full Survey - 5 Days 290 Setups - Inside and Outside Cost $130,000 Deliverable- 3D Point Cloud with Leica TruView 3D Model Generation -$80,000 Benefits Precision Measurements (± 6 mm) Full 3D Point Cloud - All Areas Measurements at your Fingertips- Fewer Visits to Site Verification with As Builts - Overlay on Theoretical Model to Identify Discrepancies

Powerhouse Point Cloud Fly-Through

TruView –Measuring Tool

POINTCLOUD TRUSS IN REVIT MODEL

Underwater laser scanner technology by Newton Labs captures as-built measurements with sub- millimeter precision, as well as being able to quantify cracks, rust, wear, fissures, corrosion, weld deterioration, pitting and other deformities. Similar in use to air laser scanners, the Newton Underwater Laser Scanner is tuned for the aquatic environment and produces a dense point cloud easily converted into a CAD model using industry standard software. A Model M210UW Underwater Laser Scanner

AUTODESK REVIT (BIM) - 3D Design Tool Features & Capabilities Differences vs. Conventional CAD software Benefits over Conventional Workflow Use of Features to Aid in Project Cost vs. Traditional I.Parametric Modeling II.Entire Project in a single model (Views, Schedules, Sheets, …) III.Worksharing and Collaboration I.Minimal inconsistencies in views II.Fully annotatable, understand real world units III.Intelligent objects vs. plain line work I.Consistent, well-coordinated Design II.Object oriented, no layer management from user side III.Typical Nuisance CADD Issues are handled automatically IV.Easy visualization, what you see what you get V.Project data embedded into the model I.Clash detection II.Visualization III.Phased Construction IV.Extract & sort data in a form of database query (such as QTO, schedules, sheet index, …) I.Job estimated as conventional design II.3D Design plus training of 4 staff members - met budget III.Future benefits – model available for Contractor use / Plant management

ELECTRICAL POWER SYSTEM