Red River Valley Association 21st Annual Regional Water Resource Conference

Louis Holstead Waurika/Chloride Control Project Manager Tulsa District November 19, 2015

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US Army Army Corps Corps of of Engineers Engineers

BUILDING STRONGSTRONG® ® Pine Creek Spillway Before and After

BUILDING STRONG® Civil Works Mission

Water Quality Water Supply • Enhances municipal, industrial, • 60% of Corps water supply contracts irrigation usage • 18 lakes, 131 water supply customers Hydroelectric Power • Protects endangered species • 2.2 million people served • 8 power plants • Improves degraded streams produce 585,000 kw capacity • Generates power to 8 million customers Webbers Falls Turbine

Red River Chloride, Area VI Tenkiller Lake Recreation • 267 recreation Flood Risk Management areas at 33 projects • 38 Corps dams + 12 others • 23 million visitors • 15,950,000 acre feet of in 2014 flood storage • Arkansas River Basin: $11,144B in cumulative flood damage reductions Inland Navigation • Red River Basin: Grand Lake (MKARNS) $1,936B in cumulative • 5 locks & dams flood damage reductions • 3 major ports Environmental Stewardship • Tenkiller Low Flow Pipe • Supersaturated Dissolved Oxygen System (SDOX)

BUILDING STRONG® Tulsa District • Over 700 people

• Arkansas River and Red River Basins in Oklahoma, Southern Kansas and Northern Texas

• Major Missions of the Corps of Engineers • War Fighting • Navigation • Flood Control (Flood Risk Management) • Military Construction • Regulatory/Environmental • Homeland Security

BUILDING STRONG® Red River Basin Watershed Map

15 projects managed for flood risk - 7 Corps of Engineers Projects - 8 Projects owned by others 1 Chloride Control Project

BUILDING STRONG® Tulsa District Reservoir Drought Update – 29 April, 2015

Skiatook 697.1 - 53% Cons Pool (water supply/water quality)

Canton 1604.1- 29% Cons Pool (water supply for OKC only)

Waurika Legend 932.0– 28% Cons Pool (water supply) - Drought Level I - Drought Level II - Drought Level III - Drought Level IV BUILDING STRONG All Lakes are at Drought Level I and above 75% full unless noted otherwise. ® BUILDING STRONG® BUILDING STRONG® Flooding in Tulsa District

 May 2015 - wettest month in OK history

 July has been the fourth wettest July on record

 Seven Pools of Record Arbuckle (147%) Broken Bow (105%) Hugo Lake (108%) Lake Texoma (125%) Lake Thunderbird (137%) Pine Creek Lake (102%) Wister Lake (124%)

 Washita River gage recorded a historic flood crest of 48.7 in June (event tied to the Cumberland Levee breach, an elevation of 21.7 feet above flood stage)

Flooding in Tulsa District Release of floodwater from Lake Texoma over the auxiliary spillway washed out Texas Highway 91 and Highway 259A

Recreation areas were submerged in flood water

BUILDING STRONG® Post Flooding in Tulsa District

Broken Bow . Broken Bow Broken Bow

Broken Bow Lake Texoma

BUILDING STRONG® Post Flooding in Tulsa District

Broken Bow Broken Bow

Dekalb Gage Site Damage Estimates – Red River (as of 11 August 2015)

. Broken Bow: $485K . Texoma: $7M . Hugo Lake: $2M . Pine Creek: $1.1M . Sardis: $250K . Pat Mayse: $500K Broken Bow

BUILDING STRONG®

Cumberland Levee Location and Background North Levee

Cumberland South Oil Field Dike . Cumberland Levees are part of the Lake Texoma project. . North and South Levee built during construction of Denison Dam to protect the Cumberland Oilfield . Cuts were made to divert the Washita River around the Cumberland Oilfield during Construction Denison Dam . Levee design crest provided less than 100 year protection

BUILDING STRONG®

Timeline of Events Leading to Breach

6-17-15 May 2015 5-28-15 6-1-15 Levee 6-20-2015 Remnants of Rainfall leads to North Levee holds Texoma Pool 6-21-2015 Tropical Storm Bill Overtopping of widespread flooding Windrowed at and Washita River Creates additional North Levee Levee Fails throughout SWT lowest areas begin receding flooding begins

Washita River at Dickson

Crest on 06-19-15 Crest on 5-29-15

BUILDING STRONG® 1 Initial Overtopping

Transmission Tower 4 Main Breach

Access Road

3 Windrow Breach 2 Near Breach

Inundation Area

5 South Levee Breach Cumberland Levee As of 22JUN2015

BUILDING STRONG® Cumberland Levee Initial Damage & Cleanup

As of 22JUN2015

BUILDING STRONG® Breach and “Near Breach” Locations Breach

Breach Near Breach

Breach Near Breach

BUILDING STRONG® Phase 1 Cofferdam and Temporary Protection (Cofferdam Plan)

BUILDING STRONG® Typical Repair Sections

Phase 1 Repair: Cofferdam and Phase 2 Repair: Permanent Levee Temporary Protection Embankment

Phase 2 TOG prior to breach Phase 1

Breach Repair: Typical Section

Phase 2 Phase 1

Near Breach Repair: Typical Section

BUILDING STRONG® Path Forward Phase 1 Repair: Cofferdam and Temporary Protection ► in design phase by SWD DSPC and SWT while Lake Texoma drops towards Conservation pool (619.0). ► Phase 1 design to undergo SWT/SWD DQC review ► Sources have been sought, and Sole Source 8 (a) contractor selected ► Award Phase I Repair construction contract when Lake Texoma reaches conservation pool. (Estimated to reach 619 by mid to late August, subject to change with additional rainfall). ► Oil Company to begin pumping out remainder of inundated area, continuing site cleanup, and restoring area to return to work as soon as cofferdam is in place. ► Estimated construction cost $3-4M Phase 2 Repair: Construct Permanent Levee Embankment ► Schedule and scope to be finalized following Phase 1 award ► SWD to serve as the Review Management Office (RMO) ► Award Phase 2 repair contract to restore protection to the area as soon as possible per original contract agreements ► Estimated construction cost $10-15M

BUILDING STRONG®

BUILDING STRONG® Flood Fight 2015

Flood Control PL 84-99 Response Strategic Communications Damage Assess/Damage Response

BUILDING STRONG® 31MAY2015: PL 84-99 Wagoner Sandbag Operations ____ sandbags distributed, Kansas City District supplied sand bag machine. Sandbags went to Wagoner and Gainesville, Texas

BUILDING STRONG® Communication

BUILDING STRONG® Total reach of Tulsa District facebook exceeded 42M views during flood event. This picture from Lake Texoma was posted on media outlets in France, Ireland, Great Britain, Russia and Japan

LakeBUILDING Texoma STRONG® Media Interviews Daily Briefings

BUILDING STRONG® Our Partners

Congressman Mullins

Congressman Ratcliff

BUILDING STRONG® Waurika Dredging Current Situation A water supply intake channel was constructed during initial construction of the water supply intake

Over time, the water supply intake channel has Become filled with sediment necessitating the need for maintenance dredging of the intake channel

Dredging the intake channel would significantly increase the dependable water yield to the conveyance system and improve water quality Way Ahead Strategic Alliances and Sponsor: Waurika Lake Master Conservancy District The Waurika Lake Master Conservancy District (WLMCD) requested Section 408 authorization to restore Lake Waurika’s dependable water volume yield of the conservation pool and Actions/Funding Requirements: improve raw water quality in April 2015 FY2015: $50,000 After District agency technical review, the WLMCD’s request was approved pursuant to Section 14 of the Rivers and Harbors Act of 1899, 33 USC 408 on 14 July 2015. This authorization was imperative for significantly increasing the dependable water yield to the conveyance system and improving the water quality for community members serviced by the WLMCD

BUILDING STRONG® Pine Creek Dam Safety Current Situation

• Dam Safety Modification Study completed and approved by Headquarters USACE and concurred PICTURE by ASA (CW) Darcy for construction in FY15

• Cutoff Wall is near completion and should be complete by 1 September.

•Steel pipe liner has been delayed until summer 2016 to take advantage of the low flows during summer months. Way Ahead Concerns

• Construct downstream filter and chimney filter. • Void around the conduit • Construct the steel pipe liner Summer 2016. • Loss of material through the conduit joints • Interim Risk Assessment will begin in Sep 2016 • Loss of material at the downstream exit face • Reassess dam with modifications in • Hydraulic fracture within the embankment place (June 2017)

BUILDING STRONG®

BUILDING STRONG®