BLUE LAKE EXPANSION PROJECT

Project Organizational Chart

Crux Subsurface(Grouting Sub)

City and Borough of Sitka(Owner)

McMillen, LLC(Construction Manager)

Barnard Construction(General Contractor)

ASRC McGraw(Powerhouse Sub)

Southeast Earthmovers(Excavation Sub)

Blue Lake Tunnelers(Tunneling Sub)

Schmolk(Mechanical Sub)

NAES(Electrical Sub)

DAM RAISE SPILLWAY ELEVATION AND SECTION

MODEL DEPICTING DAM RAISE, THRUST BLOCK, ABUTMENTS, DRAINAGE TUNNEL AND PLUNGE POOL.

Dam Site Staging Area with 600 Ton Crane

First Concrete Pour on Right Side of Dam(6 of 79 blocks are now complete)

Left Abutment and Left Side Dam Raise

INTAKESITE PLAN

DRAINAGE TUNNEL

INTAKE STRUCTURE PROFILE

Intake Portal Location

Right Abutment, Right Side Dam Raise and Intake Portal

Intake Portal

Intake Portal (when under construction)

Gate Shaft Top Portal

Bottom of Gate Shaft

POWERHOUSE SITE GENERAL LAYOUT

SURGE CHAMBER PROFILE

Inside the Adit Tunnel

Lower Project Site

New Powerhouse Site

Turbine Pit Wall Pour 1

New Penstock at SCIP

Turbine Generator Parts Stored on Site

Generation Outage

All work in the existing tunnel and new penstock must be completed during the generation outage when the tunnel will be sealed and dewatered.

The generation outage will be scheduled during August and September 2014 so that the new intake may be submerged to allow commissioning of the generation equipment.

2014-2015 RESERVOIR Operating Levels

Lake Levels

Blue Lake Expansion aerial photo

Construction Schedule Milestones: Planned/Actual

Construction Start 11-20-2012 / 12-03-2012

Drainage Tunnel Complete 07-01-2013 / 05-05-2013

Tunnel ex. complete 08-19-2013 / 07-24-2013

Construct Powerhouse 08-24-2014/

Construct Dam 08-24-2014/

Ready for Generation Outage 08-24-2014/

Substantial Completion 02-01-2015/

Questions?

www.bluelakeexpansion.com