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  • Rules and Procedures

    The District derives its regulatory authority from Title 16 of the Pima County Code, otherwise known as the Floodplain Management Ordinance (Ordinance). The Ordinance is augmented by policies and procedures that serve to clarify the requirements of the Ordinance, standardize implementation of the Ordinance, establish construction guidelines and provide tools for staff and the public to enhance the permitting process.

    Forms, Checklists and Guidance for Floodplain Permitting

    Our Resources page contains floodplain permitting resources for the public and licensed professionals, such as permit guidelines, construction details, historical aerial photography, and technical tools such as hydrologic and hydraulic modeling software.

    On December 18, 2018, the Pima County Board of Supervisors approved a new chapter of the Pima County Code, 2018-FC1- Flood Control District Lands and Facilities Regulations. The chapter outlines procedures to authorize impacts to District lands and facilities, including restoration lands, drainageways, basins and bank protection within incorporated and unincorporated portions of Pima County. The District has also created a map of District Facilities.

    The effective date of the regulations is January 18, 2019. Any use of or work on or impacting District owned land or infrastructure will require a Facility Impact Permit on or after this date. Previously, these types of activities would have been permitted through a Right-of-Way Use Permit. 

     Please visit the Facility Impact Permits page for more information.

    Floodplain Management Ordinance, Title 16 of the Pima County Code

    Current effective Ordinance

    Past Ordinances (for reference only)

    Incorporations by Reference

    Riparian Habitat Guidelines

    The revised Regulated Riparian Habitat Mitigation Standards and Implementation Guidelines (Onsite Guidelines)  and Regulated Riparian Habitat Offsite Mitigation Guidelines for Unincorporated Pima County (Offsite Guidelines)  were adopted by Pima County Board of Supervisors acting as the Board of Directors for the Pima County Flood Control District on November 15, 2011.  The revised Guidelines outline requirements for complying with Chapter 16.30 of the Ordinance and provide property owners and developers guidance on how to mitigate for impacts to Regulated Riparian Habitat.

    Additional resources can be found in the Riparian Habitat Mitigation Plan (RHMP) Tools tab on the Permitting Page.

     Technical Policies - Interpretation of Title 16 and Other Regulatory Documents

    TECH-001 RESERVED Effective:  N/A
    TECH-002 RESERVED Effective: N/A
    TECH-003 Minimum Construction Standards for Manufactured Homes Effective: 1/5/09, Rev. 11/24/10
    TECH-004 Delineating Regulated Riparian Habitat Disturbance Effective: 3/19/14
    TECH-005 Minimum Requirements for Walls and Fences Effective: 11/5/07, Rev. 12/2/2015
    TECH-006 Erosion Protection for Fill Pads Effective: 3/23/06, Rev. 12/2/2015
    TECH-007 RESERVED Effective: N/A
    TECH-008 RESERVED Effective: N/A
    TECH-009 RESERVED Effective: N/A
    TECH-010 Rainfall Input for Hydrologic Modeling Effective: 3/15/07 
    TECH-011 Permitting Requirements for Accessory Structures  Effective:  03/03/09
    TECH-012 Methods to Estimate Maximum Anticipated Scour Depth Including Optional Adjustment for Flood Duration

    Local Scour Background Summary Report
    Effective:  4/29/15
    TECH-013 Regulation of Shaded Zone X Classifications Effective:  6/19/07, Rev. 12/30/09
    TECH-014 Erosion Protection of Stem Wall Foundations Effective:  8/31/09
    Figure 014-A revised 4/9/15
    TECH-015 Acceptable Methods for Determining Peak Discharges Effective:  10/1/07
    TECH-016 Hydraulic Model Selection for Floodplain Delineation Effective:  12/1/07
    TECH-017 Applicability of and Acceptable Methods for Sediment Transport Analysis Effective:  11/24/14
    TECH-018 Acceptable Model Parameterization for Determining Peak Discharges  Effective:  4/1/11, Rev. 11/16/12
    TECH-019 Standards for Floodplain Hydraulic Modeling Effective:  11/19/12
    TECH-020 Engineering Analysis Requirements for Determining an Alternative Safe Erosion Hazard Setback Limit Effective:  11/16/11
    TECH-021 Use of Flood Resistant Materials Below the RFE Effective:  3/3/08, Rev. 12/2/2015
    TECH-022 Use of Flood Openings or Vents Below the RFE   Effective:  11/02/09, Rev. 12/2/2015
    TECH-023 Allowable Uses of Enclosed Areas with Flood Openings Effective:  11/02/09
    TECH-024 Avoiding Riparian Habitat-Requirement Effective:  PENDING
    TECH-025 Sand and Gravel Permitting Guidelines Effective:  11/07/11
    TECH-026 Interim Detention Basin Design Standards Effective:  PENDING
    TECH-027 Protective Measures for Private Vehicular Access Effective:  5/25/11
    TECH-028 Pre-Ordinance Agricultural Berms, Channels and Stock Ponds Effective:  5/18/12
    TECH-029 Electrical Facilities That Are Considered "Critical Facilities" Effective: 12/30/10
    TECH-030 Construction, Maintenance and Repair of Unpaved Roads Effective:  4/29/15
    TECH-031 Anchoring Requirements for Sheds and Tanks Effective:  PENDING
     TECH-032  Permitting Single-Lot Alternative Energy Installations  Effective 8/27/14
    TECH-033 Criteria for Two-Dimensional Modeling
    An amendment to this policy has been drafted specifically for FLO-2D. It is pending approval by the Board of Supervisors FLO-2D Technical Guidance for Hydrologic and Hydraulic Modeling (DRAFT)
    Effective: 8/1/13
    TECH-034 Lee More Basin Design Hydrology Requirements (PENDING) Effective: PENDING
    TECH-035 RESERVED Effective:

    Technical Procedures - For Uniform Implementation of Technical or Complex Tasks 

    TECH-101 Determining BFEs in AE, AH Zones, and other floodplains with detailed studies
    Effective: 1/25/06 Rev. 10/11/11
    TECH-102 Site Plan Requirements for Permitting Effective: 12/20/12
    TECH-103 Establishing the Use of Covenants Effective: 6/19/07, Rev. 11/15/13
    TECH-104 Evaluating and Adjusting the Riparian Classification Maps Effective: 3/19/14
    TECH-105 Criteria for Approval of Permits at the Counter Effective: 8/27/14
    TECH-106 Ordinance Determination of Applicability Effective: 1/25/06
    TECH-107 TBD Effective: TBD
    TECH-108 Non-Conforming Use Guidelines Effective: 3/3/08, Rev. 11/2/2015
    TECH-109 Licensing Procedure for Compliance with A.R.S. § 48-3645 Effective: 3/14/13
    TECH-110 Flood Response Guidelines and Field Manual (This document is now Administrative Procedure 202)  Effective:  NA
    TECH-112 Requirements for LOMR Submittals Effective:  PENDING
    TECH-113 TECH-113: Completion of Elevation Certificates
    Please see also the following policy memo: Establishing a local datum for Elevation Certificates within Zone A Special Flood Hazard Areas and sheetflow floodplains
    Effective: 5/23/07
    TECH-114 Content of Drainage Reports for PDD Effective: 11/1/07, Rev. 12/2/2015
    TECH-115 Permitting within Regulatory Sheet Flood Areas Effective: 11/2/09
    TECH-116 Quantitative Methods for Regulated Riparian Habitat Boundary Modifications and On-Site Vegetation Surveys Effective: 11/15/2013


    Engineering Manuals

    Riparian Habitat Mitigation Guidelines

    Flood Response Field Manual

    District Standards - To Standardize Work Products

    DS-301 Field Data Collection and Processing Methods Effective: 5/12/2011
    DS-302 Ground and Aerial Survey Standards Effective: 5/12/2011
    DS-303 Computer Aided Drafting and Design Standards Effective: 5/12/2011
    DS-304 Soil Cement Repair Standard Effective: 10/24/2011
    DS-305 Standards for Floodplain Work Maps Effective: 1/28/2014, Rev. 11/3/2015
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    Regional Flood Control District

    201 N. Stone Avenue, 9th Fl.
    Tucson, AZ 85701

    Phone: (520) 724-4600
    Fax: (520) 724-4621

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