WELCOME to the Falls Lake Regulatory Forum Hosted by Presenters - - PowerPoint PPT Presentation

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Nov 27, 2022 551 likes •864 views

WELCOME to the Falls Lake Regulatory Forum Hosted by Presenters Forrest Westall UNRBA Executive Director Sig Hutchinson Jimmy Clayton UNRBA Chair UNRBA Vice-Chair Kenny Waldroup Terry Hackett Path Forward Committee Co-Chair Board

SLIDE 1

Falls Lake Regulatory Forum

Hosted by to the

WELCOME

SLIDE 2

Sig Hutchinson

UNRBA Chair

Kenny Waldroup

Path Forward Committee Co-Chair

Jimmy Clayton

UNRBA Vice-Chair

Terry Hackett

Board Alternate/Path Forward Committee

Forrest Westall

UNRBA Executive Director

Presenters

Michelle Woolfolk

Path Forward Committee Co-Chair

Supported by UNRBA Board and the Path Forward Committee

SLIDE 3

Your guidance is critical.

We need your engagement, cooperation, and suggestions.

SLIDE 4

Reexamination Briefing

Now – 1:10 p.m.

Full-group Q&A

1:10 p.m. – 1:40 p.m.

Short Break

1:40 p.m. – 1:50 p.m.

Key Issue Roundtables

1:50 p.m. – 2:30 p.m.

PL PLAN N FOR OR THE HE DAY

Today’s Agenda

SLIDE 5

The Punchlines

Prohibitively Expensive Technologically Infeasible Data and Model Uncertainty Scientifically Sound Monitoring /Modeling Consensus Building

SLIDE 6

Origin of the Rules

2002 02 - 20 2006 06 Chl hloroph

phyll

yll-a a exce ceeds eds th the e state’s standard

2008 08 Fal alls ls Lak ake e List isted ed as as im impai paired red

2010 UN UNRB RBA A Consensus nsensus Princi Principle ples

2011 Stat tate e pa pass sses es Falls alls Lak ake e Rul ules es

BA BACKGR GROU OUND ND

SLIDE 7

Nutrient loading to the lake
Internal nutrient loading in the lake
Atmosphere / weather / rainfall /

bathymetry

Soils, land use, topography, depth,

light

Wastewater, storm events
Sunlight, shape of the lake
Retention-time, velocity

Chlorophyll-a

In 2008, exceedances of the 40 µg/L chlorophyll-a

standard resulted in the lake being listed as impaired.

Chlorophyll-a is the green photosynthetic pigment that

plants use to harness sunlight to grow. Chlorophyll-a is also an indicator of the amount of algae in the lake.

While high levels of algae can suggest the presence
f too much nitrogen and phosphorous, the variables

that control algal growth are not only highly complex, but they are also dynamic – changing between years and seasons.

That is why water quality monitoring and

modeling is required to evaluate the most effective and efficient opportunities for improving and sustaining the water quality of Falls Lake.

BA BACKGR GROU OUND ND

Model els

SLIDE 8

The Consensus Principles

Consensus Principles were established by

UNRBA members

Resulted in language in the Rules that allowed

for reexamination if certain steps were taken

Provided the framework for the UNRBA re-

examination process

Parties agreed to the protection of Falls Lake as

a drinking water supply

BA BACKGR GROU OUND ND

SLIDE 9

Framework for the Reexamination

SLIDE 10

Falls Lake Nutrient Management Strategy

Sta Stage ge I: : 2011 to 2024

Meet nutri t nutrient ent-relat related ed wat ater er quality uality st standar andards ds in in th the e la lake e be belo low Hw Hwy y 50 50

Impr

prove e al alga gae le e level els in s in th the e up upper per la lake

Lower

er nitr nitrogen gen an and d ph phosphorus sphorus lo load ading ing to th the e la lake e fr from m al all se l sect ctors

Prevent ent ne new w devel elopment pment fr from m increas increasin ing g nu nutri trien ent t lo load ading ing

Sta Stage ge II: : 2024 to 2041

Meet nutri t nutrient ent-relat related ed wat ater er quality uality st standar andards ds in in both both th the e lo lower er and and up upper per po portions tions of t f the he la lake

Decr crease ease nitr nitrogen gen lo load ading ing to th the e la lake e by 40 y 40 pe percent cent

Decr crease ease ph phospho sphorous

us lo

load ading ing to th the e la lake e by 7 y 77 7 pe percent cent

SLIDE 11

Vis Visible Pr ible Progress

gress
10,000

20,000 30,000 2005 2006 2007 2014 2015 2016 2017

Phosphorus Loads from Major Wastewater Treatment Plants (pounds per year)

60,000

120,000 180,000 2005 2006 2007 2014 2015 2016 2017

Nitrogen Loads from Major Wastewater Treatment Plants (pounds per year)

SLIDE 12

Existing development in downtown Durham.

SLIDE 13

Reexamination Timeline

SLIDE 14

Final Monitoring Report

Robust data for a scientifically informed alternative

SLIDE 15

Reexamination Timeline Reexamination Timeline

SLIDE 16

What’s Next?

The role of jurisdictional leadership over the next five years

SLIDE 17

SLIDE 18

SLIDE 19

SLIDE 20

SLIDE 21

SLIDE 22

Sig Hutchinson

UNRBA Chair

Kenny Waldroup

Path Forward Committee Co-Chair

Jimmy Clayton

UNRBA Vice-Chair

Terry Hackett

Board Alternate/Path Forward Committee

Forrest Westall

UNRBA Executive Director

Q&A Panel

Michelle Woolfolk

Path Forward Committee Co-Chair

SLIDE 23

Key Topics Roundtables

SLIDE 24

Focus on one conversation.
Please contribute and share the available time with others
Be specific. Use examples whenever you can.
Conversation isn’t commitment. Ask questions and test ideas.

We will not hold you to your brainstorming.

Do disagree; don’t be disagreeable.