ACEC Meeting

237 217 200 80 252 237 217 200 119 174 Status237 217 of Corps200 Flood27 Risk.59 Management

255 0 163 Studies131 239 and110 Projects112 62 102 130 255 0 163 132 65 135 92 102 56 120 255 0 163 122 53 120 56 130 48 111 Sheridan Willey, P.E. Deputy Chief, Project Management USACE, Galveston District

March 16, 2018

“The views, opinions and findings contained in this report are those of the authors(s) and should not be construed as an official Department of the Army position, policy or decision, unless so designated by other official documentation.” Authorized Houston Bayou Flood Risk 2 Management (FRM) Construction Projects Ongoing Authorized and Funded Construction Projects  Addicks and Barker Reservoir Dam Safety Modification Project, Phase 1 ($95M, 4 yrs, complete FY 21; 100%Fed)  Greens Bayou Flood Risk Management Project ($26M, 3 yrs, complete FY 19; cost share 75% Fed/25% non-Fed)  Flood Risk Management Project ($506M, balance to complete $74M; cost share 75% Fed/25% non-Fed)

Authorized Construction Projects Pursuing Appropriations  Clear Creek Flood Risk Management Project ($284M; cost share 65% Fed/35% non-Fed) o $100K for Economic Update (cost share 50%/50%)  Cedar Bayou Channel Improvement Project ($52M; cost share 65% Fed/35% non-Fed)

 White Oak Bayou Flood Risk Management Project ($131M; cost share 65% Fed/35% non-Fed)  Hunting Bayou Flood Risk Management Project ($171M; cost share 65% Fed/35% non-Fed) Addicks & Barker Reservoir 3 Dam Safety Modification Study, Phase 1 • Location: Houston, • Program: Dam Safety (Phase 1) • Phase: Construction (ongoing) • Authorized Total Project Cost: $129,883,340 • Current Estimated Completion Cost: $95,126,291 • Sponsor: 100% FED • Purpose: Flood Damage Reduction • Dam Safety Action Classification: DSAC 1 • Dam Safety Issues: High risk Addicks Dam associated with seepage and piping Barker Dam beneath, around, and near outlet works structure conduits • Population at Risk: 1.2 million • Potential Economic Consequences:

$60 billion Addicks New Outlet Structure Addicks and Barker Reservoir Dam Safety Modification Study, Phase 2 4

Addicks Dam Location: Houston, Texas Addicks Dam Auxiliary Program: Dam Safety (Phase 2) Spillway Phase: Potential New Start Study Capability Addicks Dam Sponsor: 100% Federal

Purpose: Flood Damage Addicks Dam Reduction

Scope: • Assess residual risks associated with flood risk impacts to structures in the pool area upstream of both reservoirs and downstream along • Comprehensively evaluate the life safety, environmental, industrial and economic impacts of potential end-around flooding and land use. • Involves local, state and federal stakeholder engagement Auxiliary Spillway Buffalo Bayou Section 216 Study

Authorization: Section 216 of Flood Control Act of 1970 Program: Flood Risk Management (FRM) Phase: Potential New Study Start Capability Non-Federal Sponsor: Harris County Flood Control District Purpose: Flood Risk Management Scope: Address residual risks associated with flood risk impacts to structures in the pool area upstream of both reservoirs and downstream along Buffalo Bayou Cost Share: 50/50 (Federal/Non-Federal) Potential FRM Measures: • Additional reservoir/dam • Increased reservoir storage capacity • Reservoir water level equalization Buffalo Bayou @ Below 59 • Improved outlet discharge capacity Bridge • Improved inflow and outlet discharge channels • Acquisition of flowage easements and buyouts • Changes in dam operation plan 5 • Harris County may develop ways to better inform residents of their risks Buffalo Bayou @ Gessner Watershed Study FRM Program 6

• Addicks & Barker Reservoir Dam System Improvement Study (A&B RDSIS) • Metro Houston Regional Watershed Assessment • Fort Bend County Regional Watershed Assessment • Southeast Texas Regional Watershed Assessment • Metro Brownsville Regional Watershed Assessment Harris County Watersheds 7

Strong Harris County Flood Control District (HCFCD)-USACE partnership! Proposed Metropolitan Houston 8 Regional Watershed Assessment (MHRWA)

Authorization: Section 729 of WRDA 1986, as amended Type of Project: Flood Risk Management (FRM) Project Phase: Potential New Study Start Capability Non-Federal Sponsor(s): Harris County Flood Control District and City of Houston Cost Share: 75/25 (Federal/Non-Federal)

Purpose: • Characterize performance of flood risk management features in the Metropolitan Houston Region as an integrated system of 22 watersheds • Understand how development patterns are affecting watershed hydrology across systems • Update statistics of extreme precipitation events for systems simulation to explain current and future potential flooding problems Integrated Approach to Metropolitan Houston FRM Studies/Assessments 9

Addicks & Dam Safety Breach risk Barker Dam Phase 2 drivers Safety Phase 2 Construction

• Data • Problems outside existing Addicks & Barker Dam/Reservoir project authority o Water drainage from Cypress Creek Watershed o Need for 3rd reservoir

NED analysis Construction Buffalo Bayou to identify Chief’s Congressional of Flood Risk Sec 216 Recommended Report Authorization Management Feasibility Study Plan Project

• Data Non-Fed • Municipal Drainage improvements sponsor $ • Interaction between watersheds • Watersheds beyond Buffalo Bayou & tributaries • Large scale detention basins (ex: golf course redesign)

Metro Houston Regional FRM Comprehensive Congressional Sec 729 Comprehensive Assessment Authorization Watershed Plan Study Metropolitan Houston FRM Projects, Studies, and Assessments

PROJECT AUTHORIZATION PHASE COST SHARING DESCRIPTION Addicks & Barker H.D. 456, 75th Congress, Construction 100% Federal (FED) Addresses seepage and piping Dam Safety Phase 1 2nd Session 1938 modified (ongoing) issues associated with the outlet by 1954 Flood Control Act work structures on both dams Addicks & Barker H.D. 456, 75th Congress, Dam Safety 100% FED Assess incremental risk, Dam Safety Phase 2 2nd Session 1938 modified Study/ overtopping with breach and by 1954 Flood Control Act Construction residual risk in pool area and (proposed) downstream, including life safety Buffalo Bayou & Sec 216 of the Flood General Potential non-Federal Address incremental risk, Tributaries Sec 216 Control Act of 1970 (review Investigations sponsor: Harris overtopping with breach and Feasibility of completed projects) - New Start County Flood Control residual risks associated with flood (proposed) District: 50/50% risk impacts to structures in the pool FED/Non-FED area and upstream and downstream of both reservoirs, including life safety Houston Regional WRDA 1986, Sec 729, as General Potential non-Federal Develop a watershed management Watershed amended by WRDA 2000 Investigations sponsor: Harris plan to provide a system wide Assessment and 2007 - New Start County Flood Control approach to water resource (proposed) District: 75/25% management of 22 primary FED/Non-FED watersheds within Harris County

10 Bipartisan Budget Act of 2018 11

Title IV - Corps of Engineers • Investigations − $75M (of $135M total) for States and areas impacted by Harvey, Irma, and Maria − Full Federal expense − Reduce flood and hurricane risk • Construction − $10.425B (of $15B total) for States and areas impacted by Harvey, Irma, and Maria − NFS cash contribution financed over 30 years − Construct flood and storm damage reduction projects authorized/Chief’s Reports/studies under investigations Continuously Growing Collaboration Network! 12

Maximizing Capital

Strategic Organizational Partnerships Change

CBP & ICE Civil Works Transformation / Process Improvement USDOT MARAD

Port of Port of Corpus Texas City Christi Transparency Communication Stakeholder and Non-

Federal Sponsor Port of Harlingen Community Connect with Us! 13