Earlier editions: 2026-09
Redlands Municipal Code Ch. 16.04 Property Slope Calculation
Redlands Municipal Code · 2026-10 edition · updated 2026-10-04 · Redlands
Cite as: Redlands Municipal Code Chapter 16.04 · Text as of 2026-10-04
16.04.010: PURPOSE AND INTENT:¶
The purpose and intent of this chapter is to implement the goals and policies of the Redlands general plan relating to the calculation of property slope and the determination of permitted densities by ensuring that the city employs the most accurate, reasonably available data to determine the slope of the property which is the subject of proposed development projects. As a prerequisite of determining an application for a development project to be deemed complete, an applicant shall obtain from the city's community development department, a calculation of the natural cross slope of the property which is the subject of the development project. (Ord. 2658 § 1, 2008)
16.04.020: APPLICABILITY:¶
This chapter shall apply to all applications submitted to the city for development project proposals unless the city's community development director, or the director's designee, concludes that the determination of average cross slope for a property is unnecessary to the city's processing of the development project proposal. (Ord. 2658 § 1, 2008)
16.04.030: CALCULATION OF SLOPE:¶
"Average cross slope" shall be determined by the city's community development department, and shall mean the method of determining the natural cross slope of property using the following equation:
| I x L x 0.0023 A | |||
|---|---|---|---|
| I | = | Contour interval in feet. | Contour interval in feet. |
| L | = | Combined length in feet of contour lines measured on the property which is the site of the development project. Contour lines shall be produced using the highest resolution digital elevation model ("DEM") reasonably available to the city. (Coarse resolution DEMs produced overly simplified contour lines, resulting in artificially low natural core slope measurements.) As higher quality DEMs become available, the community development department shall evaluate use of such DEMs to perform the average cross slope analysis. | Combined length in feet of contour lines measured on the property which is the site of the development project. Contour lines shall be produced using the highest resolution digital elevation model ("DEM") reasonably available to the city. (Coarse resolution DEMs produced overly simplified contour lines, resulting in artificially low natural core slope measurements.) As higher quality DEMs become available, the community development department shall evaluate use of such DEMs to perform the average cross slope analysis. |
| A | = | The acreage of the property which is the subject of the development project. | The acreage of the property which is the subject of the development project. |
| 0.0023 | = | A constant which converts square feet into acres and expresses slope in percent. | A constant which converts square feet into acres and expresses slope in percent. |
(Ord. 2658 § 1, 2008)
16.04.040: PROVISION OF DIGITAL DATA:¶
To assist the city in determining property slope, the applicant for a development project subject to this chapter may be requested by the city to submit to the city one copy of a digitized development project site plan and elevations, including all CAD or GIS data used in, or to produce, the plan and elevations. This data shall be in a format that requires no conversion or translation for the city to make use of the data. The data may be used by the city in its discretion dependent upon its determination of the accuracy of such determination. (Ord. 2658 § 1, 2008)
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