HIDALGO COUNTY DELTA REGION WATER MANAGEMENT PROJECT ABOUT HIDALGO COUNTY DRAINAGE DISTRICT NO. 1

Hidalgo County Drainage District No. 1 was created on April 9, 1908 by Order of the Commissioners’ Court of Hidalgo County, , pursuant to an election held within the territory affected on March 24, 1908. the Board of Directors has been made up of the County Judge and 4 County Commissioners.

Mission The mission of the Hidalgo County Drainage District No. 1 (HCDD1) is to proactively manage the Hidalgo County Master Drainage System and allow for the efficient exportation of drainage water, to protect life and property for Hidalgo County residents, businesses and surrounding ju- risdictions.

Vision Our vision is to improve Hidalgo County’s Drainage System in order to enhance long-term economic development opportunities throughout our District by implementation of innovative technology in an environ- mentally conscious manner.

Values • Community driven decisions • Transparency • Stewardship of tax dollars • Commitment to Improving Flood Control • Collaboration with Local, State and Federal Entities 2 PROJECT DELTA REGION WATER MANAGEMENT PROJECT

Details A regional mitigation project that will provide increased flood control for the most populated areas of Hidalgo County and establish a process to reclaim the water for municipal and/or irrigation use. This project is proposed to be constructed in three phases and includes an off-line storm water detention pond/reservoir and treatment facility at the following three locations: • Delta Reservoir (Phase 1), • Santa Cruz Reservoir (Phase 2), and • Carlton Barth Reservoir (Phase 3)

Need Hidalgo County’s population is expected to increase 120% by 2070, creating a municipal water supply deficit that is projected to be roughly 171,000 Ac-ft. By reclaiming the storm water in the area, HCDD1 has found a new water source that can be sustainable and also mitigates the flood hazard for the most populated areas of the region. Even today, a reliable water source is needed during growing months, Benefits This project will: • provide regional flood management for Hidalgo, Cameron and Willacy counties, • provide increased flood protection to the most populated areas of Hidalgo County, • increase the water supply to the region, • provide enhanced water quality of Laguna Madre, and • promote and support economic development in the region. 3 LOCATION DELTA REGION WATER MANAGEMENT PROJECT

“This innovative project has the potential to significantly improve flood control and eventually become a self- PHASE 2 sustainable and reliable water supply for the entire region.” - State Representative Oscar Longoria Vice-Chair, Committee on Appropriations

PHASE 1

PHASE 3

4 STATUS DELTA REGION WATER MANAGEMENT PROJECT

Texas Commission on Environmental Quality issued a Water Use Permit in 2016. A recommended project in the 2017 Texas State Water Plan by the Texas Water Development Board. HCDD1 is approved as a ‘Wholesale Water Provider’ by the Texas Water Development Board.

Project Details Project Cost Partners Timeline Project Impact

Phase 1 $103 million Hidalgo County Phase 1 Flood Control & Component A: Construction of a Delta Reservoir - $57M Delta Reservoir Flood Control 224-acre reservoir and laterals Carlton Barth (Engleman) - $21 M Willacy County Project (Component A) - Water Supply Texas Water Development Board For Hidalgo, Cameron, that will serve as a flood Santa Cruz Reservoir - $25 M Began in October 2018 through Delta Lake Irrigation District control/detention facility. in-house forces and Willacy counties Engleman Irrigation District (In progress) • HCDD1 has already Delta Water Reclamation and Phase 1, Component A removes Santa Cruz Irrigation District #15 contributed approximately Reuse (Component B) - Piloting over 2,150 structures from the 50- Component B: Water reclamation $5.8 million out of the $10 and Water Assessment year floodplain and distribution million awarded from 2012 anticipated to begin June 2021 Drainage Bonds • $10 million from 2018 bond 5 M I L E 9 M I L E 2 0

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IG MILE 3 H PROGRESO LAKES Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community Document Path: W:\Presentations\2019\08-22-2019 IBWC Portable Pump Map\GIS\IBWC Permanent Pump Map.mxd Date Saved: 11/20/2019 6 RECENT FLOOD EVENTS JUNE 2018, JUNE 2019,

7 HIDALGO COUNTY RAIN EVENTS / HURRICANES

Hidalgo County has seen an increase of rain events and their intensities. These rain events and hurricanes have impacted our communities. Properties have incurred major damage or have been destroyed. Floods are the most common natural disaster in the . It only takes an hour or two for torrential rains to cause nuisance or worse flooding in poor drainage locations across the Valley. Because floods result from many different circumstances, not all floods are equal in magnitude, duration, or effect. The large amount of rain produced by both Hurricane Dolly and Hanna required that we manage the gates at the Panchitas structure, which outfalls into the Laguna Madre.

· 2008, JULY 23 – HURRICANE DOLLY Rainfall: 6.77 in. – 12.00 in. Frequency: 50-yr.

· 2018, JUNE 18 – GREAT JUNE FLOOD OF 2018 Rainfall: 5.57 in. – 18.31 in. Frequency: 500-yr. Hurricane Dolly Great June Flood of 2018

· 2019, JUNE 24 – GREAT JUNE FLOOD, THE SEQUEL Rainfall: 1.38 in. – 15.20 in. Frequency: 100-yr.

· 2020, JULY 25 – HURRICANE HANNA Rainfall: 6.53 in. – 15.49 in. Frequency: 100-yr. Great June Flood, The Sequel Hurricane Hanna 8 THANK YOU

Hidalgo County Precinct 1 Commissioner David L. Fuentes