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?

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