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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.

    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 Requirements for Manufactured Home Foundations in Floodway Fringe Areas (with revised figures 003-A and 003-B, dated 1/30/2020) Effective: 1/5/09, Rev. 11/24/10 (Figures rev. 1/30/20)
    TECH-004 Delineating Regulated Riparian Habitat Disturbance Effective: 3/19/14
    TECH-005 Construction Standards for Fences and Walls within Regulatory Floodplains Effective: 11/5/07, Rev. 05/18/2021
    TECH-006 Erosion Protection for Fill Pads in Regulatory Floodplains Effective: 3/23/06, Rev. 05/18/2021
    TECH-007 Use of Piers for Site-built Structures within Regulatory Floodplains Effective: 05/18/2021, Rev.  05/18/2021
    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 Accessory Structures less than 200 square feet Effective:  03/03/09, Rev.  05/18/2021
    TECH-012 Methods to Estimate Maximum Anticipated Scour Depth Including Optional Adjustment for Flood Duration
    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 in Regulatory Floodplains Effective:  8/31/09, Rev.  05/18/2021
    TECH-015 Acceptable Methods for Determining Peak Discharges Effective:  10/1/07, Rev. 05/18/2021
    TECH-016 Acceptable Methods 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. 05/18/2021
    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, Applicability and Requirements Effective:  11/02/09, Rev. 05/18/2021
    TECH-023 Structures That are Allowed to be Wet Flood Proofed Effective:  11/02/09
    TECH-024 Avoidance and Minimization Requirements When a Project Contains Regulated Riparian Habitat Effective:  05/18/2021
    TECH-025 Permitting Guidelines for Sand, Gravel and Other Excavation Operations Located within Flood and/or Erosion Hazard Areas Effective:  11/07/11
    TECH-026 Regulation of Single-Lot Development within Flow Corridors Effective:  05/18/2021
    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, Rev.  05/18/2021
    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 Base Flood Elevations in Regulatory Floodplains with Detailed Studies 
    Effective: 1/25/06 Rev. 10/11/11
    TECH-102 Site Plan Requirements for Permit Review  Effective: 12/20/12
    TECH-103 Covenant (Indemnification Agreement) Use Guidelines 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 Development Without an FPUP Effective: 8/27/14
    TECH-106 Ordinance Determination of Applicability Effective: 1/25/06
    TECH-107 TBD Effective: TBD
    TECH-108 Permitting Improvements to Non-Conforming Uses Effective: 3/3/08, Rev. 05/18/2021
    TECH-109 Licensing Procedure for Compliance with A.R.S. § 48-3645 Effective: 3/14/13
    TECH-110 Using Certificates of Coverage to Reduce Certain Important Riparian Area (IRA) Mitigation Requirements under Watercourse and Riparian Habitat Protection and Mitigation Requirements (16.30) Effective:  05/18/2021, Rev.  05/18/2021
    TECH-112 Requirements for LOMR Submittals Effective:  PENDING
    TECH-113 Construction/Elevation Certificate Management Plan (CCMP)

    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, Rev. 5/11/2022
    TECH-114 Requirements for Content of Hydrologic and Hydraulic Reports (hereinafter referred to as Drainage Report) 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

    Customer Service Hours:
    8:00AM - 4:00PM

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