Flooding Issues By Jim Blackburn New Non-Profit Formed Dedicated - PowerPoint PPT Presentation

Overview of Precinct 2 Flooding Issues By Jim Blackburn

New Non-Profit Formed Dedicated to Designing a Flood- Resilient Houston And Calling Out The Truth bcinitiative.org Candidate Forum, June 29 ---- 2-4 p.m., Leonel Castillo Community Center, 2101 South Street, Houston 77009

Political Flood Literacy

City Council Districts

United States Representative Districts

Texas Senatorial Districts

Texas House Districts

Watersheds HARRIS COUNTY HARRIS COUNTY COMMISSIONER PCT. 2

Homes Flooded 30,000 25,000 20,000 15,000 10,000 5,000 0 Brays Buffalo Greens Cypress Sims Addicks Clear San Jac W White Oak Armand Vince Ship Cedar Barker sp gu remainder Bayou Bayou Bayou Creek Bayou Creek Fk Channel Bayou goose

800,000 717,198 700,000 600,000 528,720 444,602 500,000 433,250 400,000 347,334 295,694 284,727 300,000 197,570 200,000 164,172 127,350 88,895 89,753 75,908 100,000 57,249 52,386 45,890 39,349 36,878 14,014 14,952 7,689 0

Obsolete

Be Honest Addicks- Barker Failure Impact Zone

EVACUATION ZONES LAND 357,863 Ac EVAC ZONES 232,828 Ac 65% Evac Zone Pct 2 PCT 2 EVAC ZONES ZONE A (in Pct 2): 10,814 Ac ZONE B (in Pct 2): 79,688 Ac ZONE C (in Pct 2): 142,326 Ac

This surge information marker was located in Precinct 2 after Ike and then removed – why?

HGAPS Track Evaluation

Reasonable Future Hurricane Surge Event Ike Plus 15% Approximately 20 foot surge at the coast 25 Foot Surge Up the Ship Channel

Ultrahazardous Chemical Plant Electrical Grid Knocked Out By Hurricane Secondary Generators Flooded – Major Release Occurred

Tanks At Risk From 25’ Surge

Spill Volumes for Different Scenarios

Deep Deepwater ter Horiz Horizon on – 21 210 Mill 0 Mill Gall Gallon ons s of of O Oil il Exx Exxon on Vald aldez ez – 10 10 Mill Mill Gallons Gallons Of Of Oil Oil 25’ Surge – 90 90 Mil Mill l Gal Gal of of Oil Oil an and Hazar d Hazardo dous us Subst Substan ance ces

Pct. 2 STORM SURGE LAND 357,863 Ac 0 – 25-Ft SURGE 123,390 Ac (34 %) HARRIS COUNTY COMMISSIONER PCT. 2 0 – 25 FT ELEVATION SURGE ZONE

Harris Galveston County Vulnerable Coastal Area Red = 20 foot surge

Phase III: HGAPS Lower-Bay Gate Regional Storm Surge Reduction Strategies

Phase III: HGAPS Surge Evaluation Evaluation of Strategies: Lower-Bay Gate b) Ike+15%, p7, Lower-Bay a) Ike+15%, p7, Baseline Ike+15% maximum water elevations for p7 landfall (a) “Without” Lower- Bay and (b) “With” Lower -Bay Surge Protection Strategy (levee and gate features shown in dark black lines)

Phase III: HGAPS Mid-Bay Gate Regional Storm Surge Reduction Strategies Mid-Bay Gate • Gate placed in middle of Galveston Bay – Provides protected measures to most populated regions and the HSC – Able to capture chemicals from spills – Location in shallow water will likely allow for enhanced operation during storm events

Phase III: HGAPS Mid-Bay Gate Regional Storm Surge Reduction Strategies

Phase III: HGAPS Surge Evaluation Evaluation of Strategies: Mid-Bay Gate b) Ike+15%, p7, Mid-Bay a) Ike+15%, p7, Baseline Ike+15% maximum water elevations for p7 landfall (a) “Without” Mid- Bay and (b) “With” Mid -Bay Surge Protection Strategy (levee and gate features shown in dark black lines)

Phase III: Funding Source??? Lower Mid Upper Baseline Conditions Bay Bay Bay Industrial Damages $37.0 B $0 $0 $0 Residential Damages $8.9 B $1.5 B $2.5 B $4.8 B Total Damages $45.9 B $1.5 B $2.5 B $4.8 B Reduced Damages - $44.4 B $43.4 B $41.1 B (Benefit) Cost - $7.6 B $2.8 B $2.8 B

H-GAPSPlan Houston-Galveston Area Protection System The Archipelago of Access ROGE HR& RS A SSPEED CENTER WALTER P.MOORE PART ADVI NERS SORS

Maeslan t Barrier Slide Courtesy of Anne Loes Nillesen

Ik Ike Plus e Plus 15% W 15% With ith The he “Archipelag o of o of Access” In Place Place

Slide by Rogers Partners for SSPEED Center

Slide by Rogers Partners for SSPEED Center

Slide by Rogers Partners for SSPEED Center

As a Safety Valve, Why Not Start Permitting On the Archipelago of Access Today?