2028 Regional Flood Plan Working Documents (2024-2028)

Documents applicable to developing the Second Planning Cycle Regional Flood Plans (2028) can be found at the following links. Additional documents will be posted as they become available. Dates listed on this webpage indicate the date the document was posted online, or if noted, the date the document was last updated.

Contract Documents and Guidelines

  1. Request for Applications Posting (11/09/2023)
  2. Application Instructions (Updated 02/15/2024)
  3. Application Checklist (Updated 02/15/2024)
  4. DRAFT Contractor (Planning group sponsor) Task Budget (11/09/2023)
  5. Board Item Document (11/09/2023)
  6. RFPG Sponsor Designation Form (12/04/2023)
  7. DRAFT Grant Contract (02/06/2024)
  8. Reimbursement Request Worksheet (01/06/2024)
  9. Exhibit A Scope of Work (05/17/2024)
  10. Exhibit B Expense and Task Budgets (02/06/2024)
  11. Exhibit C Technical Guidelines Provides technical guidelines and submittal requirements for each scope item and additional technical guidance regarding population estimates, hydraulic and hydrologic modeling, benefit-cost ratio analysis, etc. (2/20/2025)
    • Exhibit C Update Summary Provides an update summary detailing the changes to the Exhibit C Technical Guidance. (2/20/2025)
  12. Exhibit C Tables are Excel worksheets that provides templates for all tables that are required to be included in the regional flood plan. This is being provided alongside this guidance document.
  13. Exhibit D Data Submittal Guidelines provides data submittal guidelines for regional flood planning. (1/2/2025)
  14. Exhibit E Original Application Cover Page (02/06/2024)
  15. Exhibit F Certification of Procurement of Professional Services (02/06/2024)

Supporting Studies & Materials

  1. Flood Planning Geodatabase Templates The TWDB generated template GIS geodatabases with multiple feature classes and tables for the RFPGs. Each planning group must fill the template geodatabase with relevant regional flood planning data. The template geodatabases are populated with feature classes and fields to match the specifications in Exhibit D: Data Submittal Guidelines. The geodatabase templates are being provided with the guidelines. (01/08/2025)
  2. Flood Planning Data Hub: To support the Regional Flood Planning Groups (RFPGs), the TWDB has assembled a wide array of flood-related data. The data, all of which come from publicly available sources, has been centralized into a single, easy-to-use Data Hub. (01/08/2025)
  3. Benefit-Cost Analysis (BCA) Input Tool and Instructions: The TWDB funded and guided the development of a user-friendly benefit cost analysis (BCA) input interface in the form of a spreadsheet document. This is being provided alongside the guidelines. Summary of updates (01/26/2024)
  4. Infrastructure Assessment Toolkit: The TWDB funded and guided the development of an Infrastructure Assessment Toolkit to assist with the assessment of the condition and functionality of major constructed flood infrastructure in Texas.
  5. Draft Floodplain Quilt: The floodplain quilt consists of multiple layers of data from various sources available throughout the state to ‘quilt’ together a single flood hazard dataset. The Quilt is only the starting point of flood hazard data for the RFPGs. RFPGs will need to review and potentially re-prioritize the quilt data as appropriate by location and incorporate additional information available in their respective regions. (1/27/2025)
  6. Cursory Floodplain Dataset – Future Conditions (Year 2060): The TWDB flood planning division is worked with Fathom, Aqua Strategies (ASI) and AECOM to develop future condition flood hazard coverage for the entire state of Texas for the year 2060. The analysis accounts for future climate variability and associated rainfall patterns, sea level rise, land subsidence and land use change. The dataset is a statewide set of 3-meter resolution flood hazard rasters that includes probability frequencies of 20% (5-yr), 10% (10-yr), 4% (25-yr), 1% (100-yr), and 0.2% (500-yr) annual chance flood events each for 3 different climate scenarios. A new Cursory Existing Conditions dataset is also included as part of the project. The Existing Conditions Dataset is available, and the future conditions dataset is expected to be available in April 2025. More information and download links are located on the Flood Data Hub.
  7. Texas Flood Social Vulnerability Index: The TWDB funded and guided the development of a Texas-focused flood social vulnerability index (TX F-SVI), including sensitivity analysis of the index to quantify robustness and map tools to visualize the TX F-SVI data. The dataset may be accessed on the Flood Planning Data Hub. (02/28/2025)
    • TX-SVI Final Report: This document summarizes a literature review of the SVI landscape and the interviews of Texas flood experts as well as development of the index.(03/13/2025)
    • TX F-SVI Two Pager: This document describes the difference between the CDC SVI dataset and the newly developed TX F-SVI dataset.(03/13/2025)

Administrative Documents

See Flood-Related Federal Funding Transparency Report

Regional Flood Planning Newsletters

Presentations

TWDB Communication

Emails from TWDB regarding guidance on regional flood plan development

Conference Call Documents

Materials associated with periodic conference calls between TWDB and the RFPG Sponsors, Consultants, and Chairs.

Previous Planning Cycle Information