IPES Score Summary

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Printed on 7/25/2026

Individual Parcel Evaluation System

Official Score: 726

Parcel

091-163-010 091-163-010

Address

4515 RIDGEWOOD DR, CARNELIAN BAY, CA

County

Placer County, CA

Notes

Summary of each Scoring Element

	Maximum Points	IPES Points
Relative Erosion Hazard	450	242
Runoff Potential	200	81
Access to Building Site	170	136
Disturbance in Stream Environment Zone	110	110
Condition of Watershed	70	58
Ability to Revegetate	50	25
Water Quality Improvements	50	28
Proximity to Lake Tahoe	50	10
Total Raw IPES Points	1,150	690

Determination of IPES Score

Raw IPES Points		690
Factor for Parcel Area Outside of SEZ < 5000 sq. ft.		1
Factor for Parcel Area Outside of SEZ < 10,000 sq. ft.		1
Factor for Parcel with No Area Outside of SEZ or SEZ Setback		1
Limited Incentive Points		36
IPES Score		726

Determination of Base Allowable Coverage

Location	Area (ft²)	Allowable Base Percent (%)
IPES Building Site Area	Unknown	4%
Parcel Area in SEZ	0	-
Parcel Area in SEZ Setback	0	-

IPES Coverage Score: 323

Printed on 7/25/2026

Individual Parcel Evaluation System

Official Score: 726

Parcel

091-163-010 091-163-010

Address

4515 RIDGEWOOD DR, CARNELIAN BAY, CA

County

Placer County, CA

Details of each Scoring Element

Relative Erosion Hazard Score

242

Soil Erodibility Factor

0.15

Rainfall Factor

LS Factor

5.65

Length Slope Segments

Length	Slope Angle
14 ft.	41%
19 ft.	25%
24 ft.	13%
26 ft.	23%
25 ft.	28%
12 ft.	44%

Runoff Potential Score

81

Hydrological Soil Group

Group B

Hydrological Condition

Fair

Access Score

136

Disturbance for Access

No Disturbance

Parcel Access Type

New Access Up Slope

Excavation Difficulty

Moderate

In Streamzone

Height of Cut Slope

> 1 - 2 feet

Height of Fill Slope

<= 3 feet

Gradient of Cut or Fill Slope

> 8 - 12%

Utility in SEZ Score

110

Utility Disturbance

No Disturbance

Condition of Watershed Score

58

Watershed

Cedar Flats

Ability to Revegetate Score

25

Vegetative Group

Group B - Dryness

Elevation of Parcel

< 7000 feet

Average Building Site Slope

Compass Degrees of Parcel

90 E

Water Quality Improvements Score

28 Proximity to Lake Score

10

Proximity to Lake

Between 6240 Foot Contour and 1 Mile From HWL