File Name

Document Name/Description

Requesting Floodplain Information

Flood Info Request Form

(37 KB)

Fill out form and fax to Navajo County 928-524-4122 

Regulatory Documents

These documents describe the delineation and regulation of flood hazard areas in the unincorporated areas of Navajo County.

Floodplain Ordinance

(537 KB)

Navajo County Flood Damage Prevention Ordinance. 

Flood Study Part 1

(1,430 KB)

Flood Insurance Study for Navajo County Arizona Unincorporated Areas, revised November 2003.  Part 1 includes the text, tables and figures for this study.

Flood Study Part 2

(3,705 KB)

Flood Insurance Study for Navajo County Arizona Unincorporated Areas, revised November 2003.  Part 2 includes the flood profiles for this study.

Technical Bulletins

These documents provide guidance for builders and design professionals on complying with the construction requirements of the National Flood Insurance Program Regulations.

Bulletin 1-93

(446 KB)

Openings in Foundation Walls for Buildings Located in Special Flood Hazard Areas in accordance with the National Flood Insurance Program. 

Bulletin 2-93

(593 KB)

Flood Resistant Materials Requirements for Buildings Located in Special Flood Hazard Areas in accordance with the National Flood Insurance Program. 

Bulletin 7-93

(777 KB)

Wet Floodproofing Requirements for Buildings Located in Special Flood Hazard Areas in accordance with the National Flood Insurance Program. 

Engineering Guidance

These documents provide guidance to engineers, surveyors and other professionals involved in commercial or subdivision development in Navajo County.

Subdivision & Commercial Guidelines

(276 KB)

Drainage and Floodplain Requirements for Development in Navajo County.  Guidance for developers and engineers on meeting the Navajo County drainage and floodplain requirements for subdivision and commercial development.

Erosion Hazard

(287 KB)

Erosion Hazard Assessment.  Guidance for engineers in identifying erosion hazards along streams and watercourses in Navajo County.

Vegetative Cover

(266 KB)

Estimating Percent Vegetative Cover.  Guidelines for engineers in estimating percent vegetative cover when using the ADOT Hydrology Manual HEC-1 methodology.

Impervious Cover

(279 KB)

Estimating Percent Impervious Cover.  Guidelines for engineers in estimating percent impervious cover when using the ADOT Hydrology Manual HEC-1 methodology.