stg incorporated 11820 south gambell street anchorage, ak 99515

STG Incorporated 11820 South Gambell Street Anchorage, AK 99515 www.stgincorporated.com STG Incorporated 11820 South Gambell Street Anchorage, AK 99515 www.stgincorporated.com

STG Incorporated 11820 South Gambell Street Anchorage, AK 99515 www.stgincorporated.com

Presentation Overview

• Background on STG• Alaska Utility Scale Wind Systems

– STG Involvement– Project Costing

• Innovation through Construction Process• Rural Infrastructure Spending Trends• Challenges and Opportunities


Statewide Construction Services and Management


STG Wind Power Projects


CLIENT LOCATION TURBINES CAPACITY (KW)

AVEC Selawik 4 260

AVEC Toksook Bay 3 300

AVEC Kasigluk 3 300

AVEC Hooper Bay 3 300

AVEC Savoonga 2 200

AVEC Gambell 3 300

AVEC Mekoryuk 2 200

AVEC Chevak 4 400

AVEC Quinhagak 3 300

TDX St. Paul 2 450

TDX Tin City 2 450

BSNC Nome 18 1170

IES Kongiganak 5 475

UVEC Unalakleet 6 600

TOTAL: 14 60 5,705


A Typical STG Wind Project

Expense Category %Turbine Procurement 38%Interconnect Line Work 14%Labor 14%Materials 13%Freight 10%Equipment 8%Other 2%Services 1%Travel 1%


Rural Wind Construction


Approximate Wind System Costs

Location Region KWTurbine

sManufacture

r CompletedProject

Cost $/KWSelawik SW 260 4 AOC 2004 $1,372,000 $5,277 Kasigluk SW 300 3 Northern 2006 $3,076,000 $10,253

Toksook Bay SW 300 3 Northern 2006 $3,352,551 $11,175 Savoonga W 200 2 Northern 2008 $3,005,794 $15,029 Tin City W 225 1 Vestas 2008 $1,900,000 $8,444 Nome W 900 18 Entegrity 2008 $5,657,000 $6,286

Hooper Bay SW 300 3 Northern 2008 $3,197,668 $10,659 Gambell W 300 3 Northern 2009 $3,716,506 $12,388 Chevak SW 400 4 Northern 2009 $3,471,978 $8,680

Kongiganak SW 475 5 Windmatic 2009 $4,200,000 $8,842 Totals: 3660 46 AVERAGE $9,578

Source: Denali Commission Records / Alaska Energy Authority


Construction Cost Containment

Expense Category %Turbine Procurement 38%Interconnect Line Work 14%Labor 14%Materials 13%Freight 10%Equipment 8%Other 2%Services 1%Travel 1%

• Majority of project expenses are incurred with the purchase of WTGs

• Project interconnect costs vary significantly depending on location from existing infrastructure

• Some flexibility in equipment spread, but utilization of heavy equipment improves construction/erection safety and efficiency

• Biggest opportunity for construction cost savings realized through foundation design


Foundation Solutions

Foundation Location Year

Driven Pile St. Paul 2002Rock Anchor Sealwik 2004Driven Pile Toksook Bay 2005Helical Pile Kasigluk 2006Driven Pile Hooper Bay 2008Driven Pile Savoonga 2008

Poured Concrete Tin City 2008Rock Anchor Nome 2008

Driven Pile Kongiganak 2009Driven Pile Chevak 2009Driven Pile Mekoryuk 2009

Poured Concrete Unalakleet 2009Poured Concrete Gambell 2009

Pre-Cast Concrete Quinhagak 2009


Toksook Bay Foundation


Banner Ridge Foundation


Quinhagak Foundation


Wind-Diesel Integration and Objectives

http://northernpower.kiosk-view.com/unalakleet


Challenges Faced with Energy Cost Escalation

RESIDENTSRESIDENTS

COMMERCIALCOMMERCIAL

SERVICESSERVICES

STATE AND FEDERAL

ASSISTANCE

STATE AND FEDERAL

ASSISTANCE


Alaska Trends in Federal Spending

Source: The Tax Foundation, Washington, D.C


Federal and State Capital Project Spending (1990-2008)

Kasigluk Toksook Bay Selawik Hooper Bay SavoongaWind Generation $ 2,503,961 $ 3,030,000 $ 1,315,012 $ 3,127,668 $ 1,554,697 Other Energy Infrastructure $ 11,551,558 $ 11,835,516 $ 9,377,153 $ 507,887 $ 7,603,263 Health/Sanitation $ 23,795,520 $ 14,608,238 $ 19,899,144 $ 29,428,452 $ 22,021,436 Transportation $ 15,444,175 $ 14,161,939 $ 16,573,713 $ 13,589,129 $ 16,711,667 Education $ 8,828,704 $ 34,862,293 $ 25,000,000 $ 32,269,036 $ 32,233,568 Other Development $ 4,812,826 $ 3,291,548 $ 11,787,939 $ 16,850,229 $ 30,742,250 TOTAL $ 66,936,744 $ 81,789,534 $ 83,952,961 $ 95,772,401 $ 110,866,881

Population 545 610 828

1,149

712 Per Capita Spending $ 122,820 $ 134,081 $ 101,392 $ 83,353 $ 155,712

Source: AK Division of Community and Regional Affairs


Federal and State Capital Project Spending (1990-2008)

Source: AK Division of Community and Regional Affairs


Typical Village Infrastructure

REQUIRE AFFORDABLE ENERGY TO BE SUSTAINABLE


Current Energy Delivery in Rural Alaska


Potential Energy Delivery in Rural Alaska


Opportunities with Dispatchable Energy

Concept Credit: Dennis Meiners, Intelligent Energy Systems

stg incorporated 11820 south gambell street anchorage, ak 99515

Documents

south gambell street

comunalakleet slide

c slide

management slide

foundation design slide

quinhagak foundation

rural wind construction

federal assistance slide