Average natural slope.
Riverside Municipal Code § 17.08.150
in effect17.08.150 - Average natural slope.
"Average natural slope" is the slope determined pursuant to the City of Riverside's adopted Average Natural Slope Formula specified in Section 19.100.050 of this Code, as follows: 'Average Natural Slope' means the average natural inclination of the ground surface of a lot or parcel expressed as a percent and as measured by the following formula:
S = (0.002296 × I × L)
A
Where: S = average natural slope in percent
I = natural contour interval in feet
L = length of natural contours in feet
A = acres of property (parcel of record existing on November 13, 1979)
0.002296 = constant which converts square feet into acres and expresses slope in percent.
The average natural slope shall be computed from photogrammetric maps, grading permit plans and other data or evidence approved by the Public Works Department.
(Ord. 7459 § 35, 2019; Ord. 6453 § 1, 1998; Ord. 5585 § 1, 1987)
Source: City of Riverside, California, Municipal Code and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/ca/riverside/codes/code_of_ordinances?nodeId=PTIICOOR_TIT17GR_CH17.08DE_17.08.150AVNASLFetched: 11/1/2026