City of Dallas Emergency Operation Center Response to May 2015 Flood Events

Overview Storm Description Emergency Operations Overview After Action 2

Storm Description 3

Trinity River Watershed 4

Upper Trinity River Watershed 5

Rainfall Distribution 6

USGS River Gage Locations Lake Ray Roberts Lake Lewisville Lake Grapevine Elm Fork @ Carrollton Elm Fork @348 West Fork @ Grand Prairie Trinity River @ Commerce Trinity River below Dallas 7

Peak Flow Information Location Lake Ray Roberts Maximum Discharge (cfs) Maximum Water Surface Elevation (feet) 8,620 535.03 Lake Lewisville 18, 700 30.99 Peak Date/Time 5/30/2015 13:00 pm 5/31/2015 3:00 am Frequency Flood Event NA NA Elm Fork @ Carrollton 20,800 12.73 5/30/15 13:00 pm ~ 20 year event Lake Grapevine 3,460 8.85 Elm Fork @ Spur 348 West Fork Trinity River Trinity River @ Commerce ~20,200* 27.24 27,100 29.32 47,500 42.01 6/1/2015 24:00 pm 5/31/2015 00:30 am 5/29/2015 05:00 am 5/29/2015 18:00 pm NA ~ 20 year event ~ 10 year event ~ 10 year event 8

White Rock Spillway

Flood Pictures

Emergency Operations Overview 17

Preparedness Actions Participated in Integrated Emergency Management Course in Emmitsburg, MD (2/2015) with Major Flooding as the Scenario for the Course Exercise Coordinated and facilitated two planning meetings in the City Emergency Operations Center Discussed roles and responsibilities of agencies in a major flooding event Evacuation Emergency Warnings Public Safety Sheltering Resources Available 18

Operational Functions Activated the Emergency Operations Center for coordinating response among City Departments 5/29/2015 6/1/2015 (24 Hours) Participated in multiple daily briefings from US Army Corps of Engineers and National Weather Service to monitor river flow rates Tracked all road closures, rescues, and calls for service in affected areas and coordinated City Response Provided Warning Messaging to the public via Reverse 911 system and distribution of flyers to affected areas Conducted Press Conferences to provide information to public and distributed updates to City Council multiple times daily on operations 19

Emergency Operations Center EOC activations are staffed by the following departments: Office of Emergency Management (OEM) Trinity Watershed Management (TWM) Dallas Police Department (DPD) Dallas Fire-Rescue Department (DFR) City Manager s Office(CMO) Public Information Office (PIO) Department of Streets Services (STS) Dallas Water Utilities (DWU) 20

System Operations &Maintenance 11 Pump stations with sumps + Street pump Stations 60-70,000 Inlets & storm drains ~ 200 Retention/Detention Ponds 33 miles Levees ~100 Inline Stormwater Interceptors Roadways

System Operations &Maintenance Rochester 22

Street Flooded Warning System 40 Flooded Roadway Warning Systems (FRWS) located city-wide 8 Underground Lift Stations During the May events, all FRWS have been activated on numerous Occasions Street flooding continues to impact areas in the Northwest and Southeast Flooded Roadway Warning Sign 23

Pumping Systems Throughout the events all 33 pumps were operating simultaneously and several continue to operate as water is moving through the Eagle Ford Sump Eagle Ford Sump is the area where residential voluntary evacuations occurred Proposed Delta Pump Station improvements and the proposed Trinity Portland Pump Station will reduce flooding impacts 24

After Action 25

Post Event Flood Operations TWM continued to operate 24/7 for several weeks. DPD, STS and Marshals provided support of road closures and access concerns Corps continued to have lake releases and would have them for several weeks Continue to promote the Turn Around. Don t Drown. campaign and actively encourage people to avoid streams, creeks and rivers 26

Assessing Conditions Citizens and government agencies are currently assessing flood impacts Known localized flooding occurred at: Upper Northwest Residential near Ottawa/Mexicana/Canada/Pioria (Eagle Ford & Francis Sump areas West Dallas) Loop 12/Singleton Area (West Fork Trinity River) Luna Road/I35 (Elm Fork Trinity River) Peavy Road (Dixon Branch u/s White Rock Lake) Goforth & Lawther (White Rock Creek) Other Street Flooding 27

Recovery Activities Collected information on operational costs and damages to property and infrastructure Finalized statistics on rescue operations: 165 street blockages, 163 persons in danger from high water calls, and 84 minor accidents Federal Disaster Declaration was achieved based on damage. Recovery work still continues today. 28

Questions 29