(A) This chapter addresses engineering issues associated with grading and drainage policies and criteria, grading and drainage design practices and floodplain management within the town. It is the overall and primary objective of the town to provide grading and drainage design criteria that serve to protect the health, safety, and general welfare of the citizens of the community, with regards to flooding and drainage issues.
(B) This chapter provides general engineering guidelines and is not intended to be a substitute for sound engineering judgment when dealing with specific design problems. Specific engineering procedures and methodologies are not always dictated within this manual, but instead are often cited by reference to other widely accepted design manuals published by the U.S. Army Corps of Engineers (COE), Arizona Department of Transportation (ADOT), Arizona Department of Water Resources (ADWR), Arizona Department of Environmental Quality (ADEQ), Federal Highway Administration (FHWA), and other regulatory agencies within Arizona. This approach is intended to provide the engineer with the flexibility to apply engineering methods most appropriate to an individual project. Other objectives of this chapter include:
(1) Minimizing the review time for drainage reports and improvement plans;
(2) Providing the Design Engineer with the town’s grading and drainage requirements prior to initiating a project; and
(3) Providing for drainage infrastructure that is functional, durable and aesthetic.
(Res. 1637, passed 2-28-02)