slope development
slope development
(OP)
I am a program administrator for a regional government in Alaska. Working with policies written more than 10 years ago, I am often left wondering about the reasonability of certain policies. Recently, State Forest administrators have questions about our recommendations for limits on road construction based on the policy below. Please let me know if there are reasonable engineering concerns which are addressed in the policy. Thanks!
"Erosion : [Administrative Policy] - The following performance standards should be considered for development on slopes exceeding 15 percent
"a. For slopes of 15 to 30 percent, the area used for development should not exceed 25 percent of the site.
"b. For slopes of 31 percent or greater, the areas used for development should not exceed 10 percent of the site.
"The areas used for development include all structures, roads and driveways.
"Erosion : [Administrative Policy] - The following performance standards should be considered for development on slopes exceeding 15 percent
"a. For slopes of 15 to 30 percent, the area used for development should not exceed 25 percent of the site.
"b. For slopes of 31 percent or greater, the areas used for development should not exceed 10 percent of the site.
"The areas used for development include all structures, roads and driveways.





RE: slope development
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: slope development
Of course if ample development pressure is occurring it means that land value is already being pressed upwards, and then the bigger distances cause what to developers look as an unnecessary high cost.
RE: slope development
RE: slope development
RE: slope development
Guidelines must limit the maximum allowable slope. This might be 1.5(horizontal) to 1(vertical) or 2(h):1(v) or something in this range.
The guidelines might consider a maximum height of retained soil such as 2.4 m (8 feet) as in the case of a basement wall.
In consideration of these constraints they create geometric constraints to development.
How these specific guidelines were developed is not clear since there is no indication of the size of the "site".
If you try to draw the requirements in section and in consideration of stable slope angles you might determine the intent of the regulations and their appropriateness.