A. Subdivision Design

Points

1. Ingress/Egress

Two or more primary roads 1

One road 10

One-lane road in, one-lane road out 15

2. Width of Primary Road

20 feet or more 1

Less than 20 feet 5

3. Accessibility

Road grade 5% or less 1

Road grade 5-10% 5

Road grade greater than 10% 10

4. Secondary Road Terminus

Loop roads, cul-de-sacs with an outside turning radius of 45 feet or greater 1

Cul-de-sac turnaround 5

Dead-end roads 200 feet or less in length 8

Dead-end roads greater than 200 feet in length 10

5. Street Signs

Present but unapproved 3

Not present 5

B. Vegetation (IUWIC Definitions)

1. Fuel Types

Surface

Lawn/noncombustible 1

Grass/short brush 5

Scattered dead/down woody material 10

Abundant dead/down woody material 15

Overstory

Deciduous trees (except tall brush) 3

Mixed deciduous trees and tall brush 10

Clumped/scattered conifers and/or tall brush 15

Contiguous conifer and/or tall brush 20

2. Defensible Space

70% or more of lots completed 1

30% to 70% of lots completed 10

Less than 30% of lots completed 20

C. Topography

Located on flat, base of hill, or setback at crest of hill 1

On slope with 0-20% grade 5

On slope with 21-30% grade 10

On slope with 31% grade or greater 15

At crest of hill with unmitigated vegetation below 20

D. Roofing Material

Class A Fire Rated 1

Class B Fire Rated 5

Class C Fire Rated 10

Nonrated 20

E. Fire Protection—Water Source

500 GPM hydrant within 1,000 feet 1

Hydrant farther than 1,000 feet or draft site 5

Water source 20 min. or less, round trip 10

Water source farther than 20 min., and 45 min. or less, round trip 15

Water source farther than 45 min., round trip 20

F. Siding and Decking

Noncombustible siding/deck 1

Combustible siding/no deck 5

Noncombustible siding/combustible deck 10

Combustible siding and deck 15

G . Utilities (gas and/or electric)

All underground utilities 1

One underground, one aboveground 3

All aboveground 5

Total for Subdivision

Moderate Hazard 50–75

High Hazard 76–100

Extreme Hazard 101+