Basin Management Study Open House #1 March 22, 2017 Welcome - - PowerPoint PPT Presentation

Alamo Wash Basin Management Study

Open House #1 March 22, 2017

Welcome

• Agenda

Introductions and Opening Comments Project Characteristics Project Scope of Work Project Schedule Public and Stakeholder Involvement and Input Questions Adjourn to Comment on Maps

Fred Felix, P.E.

• City/County collaboration
• Study will identify best way to manage this basin
• Develop rating system for all aspects
• Share knowledge of study area – Comment forms

Introductions

• Project Team

Pima County Regional Flood Control District City of Tucson CMG Drainage Engineering Inc. JE Fuller Hydrology & Geomorphology Inc. Ashby Surveying Wheat Design Group Kaneen Communications

Project Characteristics

Project Scope of Work

• Existing Conditions Data Collection and Review
• Floodplain Delineation
• FEMA Letter of Map Revision (LOMR) if Justified
• Alternatives Analysis and Remediation Recommendations
• Public and Stakeholder Involvement

Existing Conditions

• Data Collection

 Drainage Complaints  Operation Splash  As-Built Plans  Review Previous Studies

• Historical Peak Flow Data

 Tucson Stormwater Mgt Study  USGS Stream Gage

• Field Inspections

 Survey Existing Culverts, etc.

Floodplain Delineation

• 2 dimensional modeling (FLO-2D)
• New Technology (not available 20 years ago)
• More detail – breaks down watershed to over

1 million pieces

• Uses current topographic and landuse data

(2015)

• Able to reflect bridges, culverts, storm drains,

etc.

• Better for alternatives evaluation
• Major Wash & localized flows are determined
• Draft map for illustration only

Alternatives Analysis

• Develop a comprehensive

list of problem areas

• Top rated locations to

advance

• Listen to Stakeholders

about potential Alternatives

Alternatives Analysis

• Propose mix of alternatives
• Structural (new culvert, bank protection, detention basin, etc.)
• Policy based (development standard)
• Operational (frequency of vegetation maintenance)

Project Schedule

Public and Stakeholder Involvement and Input

• Periodic stakeholders meetings
• Flood Control Project website
• Go to www.pima.gov and enter Alamo Wash Basin Management in the

search field

• Project updates
• First of three Open Houses

Questions?

Thank You! Please Visit Our Maps!