2020 Dam Safety EAPs and TTXs: What Does the Future Hold? · photo box. Sample . photo box. Bradley Crowell. Director. Tim Wilson, P.E. State Engineer. Adam Sullivan, P.E. Deputy

water.nv.gov

2020 Dam Safety EAPs and TTXs:What Does the Future Hold?

Picture – use thin white frame

Cover photo –choose an inviting

image that’s on-brand and draws audience in; should represent the “big picture” of presentation topic

Keith Conrad, P.E. Nevada Division of Water Resources

Going Forward – NDWR’s Plans

2

Bradley CrowellDirector

Tim Wilson, P.E.State Engineer

Adam Sullivan, P.E.Deputy Administrator

Micheline Fairbank, J.D.Deputy Administrator

• We plan to continue combining EAPs and maps into easy-to-use binders for Emergency Managers• Provide yearly updates• Add low-hazard inundation maps to the binders• Add large-scale maps (electronic)• Add dam safety ratings to binders

• Analyze watersheds, reservoirs and spillways to calculate maximum allowable safe inflows into reservoirs to help owners/operators operate their dams safely

3

Panoramic photo

Sample photo box

Sample photo box

Sample photo box





Going Forward – NDWR’s Plans

• NRS/NAC changes to clarify EAP requirements• Create EAP template and checklist to help EAP producers• Establish breach scenarios for inundation mapping• Determine minimum flow rates that downstream

flooding begins (without dam failure)• Establish requirements for tailings dam inundation

mapping to more accurately simulate inundation areas• Possibly require inundation map timeline videos to help

Emergency Managers plan evacuations• Standardize inundation map details and callouts

4

Sample photo box





Going Forward – How Can We Help You?• How can our office help you with regards to dam safety?• What can we do to make Dam EAPs better for you?

• What do you want to see in an EAP?• How do you want EAPs presented?• Help put on Table-top Exercises

5

Sample photo box





• Know what dams are where in your jurisdiction• Know what dams have EAPs and where the EAPs are

located• Review EAPs on file and provide feedback to our office• Exercise your EAPs - ask dam owners to put on a Table-

Top Exercises• Work with dam owners to help prepare EAPs

Going Forward – How Can You Help Yourself?

6

Sample photo box





• Communicate with our office regarding questions, issues, or anything dam-related


7

Sample photo box

Sample photo box






• Notice when downstream conditions of a dam change or will change. This can change hazard ratings, inundation areas, inundation hazards, etc.• Notify our staff. We can make an owner update or

create a new EAP to reflect downstream condition changes, i.e., a new development is planned below a dam

8

Sample photo box

Sample photo box





• Familiarize yourself with what might cause dams in your area to be stressed and/or fail:• Dam condition• Unauthorized modifications


9

Sample photo box

Sample photo box






• Familiarize yourself with what might cause dams in your area to be stressed and/or fail:• Monsoons• Post-wildfire rain event

10

Sample photo box

Sample photo box






• Familiarize yourself with what might cause dams in your area to be stressed and/or fail:• Dam condition – operating control damage

11

Sample photo box

Sample photo box






• Familiarize yourself with what might cause dams in your area to be stressed and/or fail:• Dam condition - compromised principal spillway

(outlet)

12

Sample photo box

Sample photo box






• Familiarize yourself with what might cause dams in your area to be stressed and/or fail:• Monsoons• Sediment into reservoir reduces capacity

13

Sample photo box

Sample photo box






• Familiarize yourself with what might cause dams in your area to be stressed and/or fail:• Dam condition – operating control access

14

Sample photo box






• Familiarize yourself with what might cause dams in your area to be stressed and/or fail:• Dam condition – rodents• Dam condition – vegetation• Reduced spillway capacity

15

Sample photo box






• Familiarize yourself with what might cause dams in your area to be stressed and/or fail:• High flows• Rain-on-snow events

16

Sample photo box

Sample photo box






• Familiarize yourself with what might cause dams in your area to be stressed and/or fail:• Large spring snowmelt• Communication

17

Sample photo box

Sample photo box





Going Forward – Things to Remember• Dam failures occur almost yearly in Nevada in every part

of the state• NDWR is here to support you• Thank you for attending this webinar!

Questions?

Contact:Keith Conrad, P.E.

Nevada Division of Water Resources – Dam Safety Program(775)684-2844 l [email protected]

water.nv.gov6





Documents

2020 Dam Safety EAPs and TTXs: What Does the Future Hold? · photo box. Sample . photo box. Bradley Crowell. Director. Tim Wilson, P.E. State Engineer. Adam Sullivan, P.E. Deputy