Biglow CanyonWind Farm

Portland General Electric

PGE power supply portfolioPGE power supply portfolio

Biglow Canyon Wind Farm

Location: Sherman County, OregonSize: 25,000 AcresOwner: Portland General ElectricPermitted Capacity: 450 MW, max 225 turbinesPhase I: 125 MW (76 Vestas V-82)Phase II and III: 325 MW (141 Siemens

SWT 2.3-93)Transmission: BPA to PGE Grid

Three Phases on 25,000 AcresONE

2007

TWO

2008-2009

THREE

2009-2010

BCWF Pre-project Surveys• Pre-field review – special

status/sensitive plant and animal species

• Four-season wildlife baseline study

• Special status/sensitive species surveys

• Raptor nest surveys• Nocturnal bat surveys• Vegetation community

mapping and habitat categorization

Wildlife Survey ResultsAvian use surveys:

– 78 species total; 48 species in facility area; 59 species in reference area

– Passerines most abundant group year-round– Waterbirds/waterfowl; upland gamebirds; raptors

Raptor nest surveys: (325 sq mi survey area)– 26 R-t hawk nests; 10 Swainson’s hawk nests; 6 GHO

nests; 1 kestrel nest; 1 prairie falcon nest; 25 raven nests

– Within 2 miles facility: 8 R-t hawk nests; 3 Swainson’s hawk nests; 1 GHO nest; 1 kestrel

Special status/sensitive species surveys:– Grasshopper sparrow; loggerhead shrike; Swainson’s

hawk; ferruginous hawk; white-tailed jackrabbit; western toad

Nocturnal anabat surveys:– Low call rates (6 bat calls) compared to other surveys

for similar projects

Habitat Impacts

Permanent impacts:– 8.41 acres Category 3 habitat (CRP, grassland,

shrub-steppe)– 3.52 acres Category 4 habitat (CRP grassland, shrub-

steppe)Calculated potential displacement impacts:

– 33 acres (Category 3 CRP, grassland/shrub-steppe; Category 4 CRP, grassland/shrub-steppe)

Combined impacts:– 45 acres

Pre-construction SurveysRaptor NestingNoxious Weeds

Environmental Awareness Training

Revegetation PlanWeed Control PlanHabitat Mitigation PlanWildlife Monitoring & Mitigation Plan

Habitat Mitigation Plan117-ac Conservation EasementReseedingWeed ControlFencingNew Water SourceSpring Enhancements

Wildlife Monitoring and Mitigation PlanRaptor Nest Surveys

Avian/Bat Fatality MonitoringAvian Use and Behavior Surveys

Wildlife Incident Response/Handling

Fatality Rate Thresholds of Concern

0.20State sensitive species (ex. Raptors)

0.59Target grassland birds

2.50Bat species as a group

0.06Raptor species of special concern

0.09Raptors

Threshold of Concern(fatalities per MW)Species Group

Post-construction Wildlife Issues