OAR 629-044-0240
Topography Hazard Factor


(1)

The reference for establishing the topography hazard factor shall be:

(a)

The General Soil Map Report published by the Oregon Water Resources Board and the Soil Conservation Service, USDA in 1969; or

(b)

The appropriate 7.5 minute quadrangle map published by the U.S. Geological Survey, USDI.

(2)

For geographic areas determined by use of a reference set forth in subsection (1) above, select the appropriate hazard value from Table 2.
TABLE 2
TOPOGRAPHY HAZARD FACTOR
Map Slope Class — Hazard Value
1 (Slopes 00–03%) — 0.
2 (Slopes 03–07%) — 1.
3 (Slopes 07–12%) — 1.
4 (Slopes 12–20%) — 2.
5 (Slopes 20–35%) — 3.
6 (Slopes 35–60+%) — 3.

Source: Rule 629-044-0240 — Topography Hazard Factor, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=629-044-0240.

Last Updated

Jun. 8, 2021

Rule 629-044-0240’s source at or​.us