Incorporating TMDLs into Masons MS4 Program Kathy Dorman, City of - - PowerPoint PPT Presentation

▶
incorporating tmdls into
SMART_READER_LITE
LIVE PREVIEW

Incorporating TMDLs into Masons MS4 Program Kathy Dorman, City of - - PowerPoint PPT Presentation

Oct 30, 2023 178 likes •528 views

Incorporating TMDLs into Masons MS4 Program Kathy Dorman, City of Mason Kelly Kuhbander, City of Mason, Strand Associates Mason Background Located in Southwest Ohio in Warren County Population Approx. 30,000 Area Approx. 18.6 Square

slide-1
SLIDE 1

Incorporating TMDLs into Mason’s MS4 Program

Kathy Dorman, City of Mason Kelly Kuhbander, City of Mason, Strand Associates

slide-2
SLIDE 2

August 20, 2015 Ohio Stormwater Association

Mason Background

  • Located in Southwest Ohio in Warren County
  • Population Approx. 30,000
  • Area Approx. 18.6 Square Miles
  • Lower Little Miami River Watershed
slide-3
SLIDE 3

August 20, 2015 Ohio Stormwater Association

Locating Mason’s TMDLs

  • http://www.epa.ohio.gov/dsw/tmdl/index.aspx
slide-4
SLIDE 4

August 20, 2015 Ohio Stormwater Association

Lower Little Miami TMDLs

  • Specific TMDLs that have been developed and are

described in the TMDL report include:

  • Pathogens (using E coli as an indicator of contamination)
  • Nutrients (using total phosphorus as the indicator)
  • Oxygen demand
  • Sediment
  • Habitat

Which of these apply to Mason??

slide-5
SLIDE 5

August 20, 2015 Ohio Stormwater Association

Locate Mason’s HUCs

  • TMDL Fact Sheet – Mason is part of 10 digit HUC 08

(05090202-08) and HUC 09 (05090202-09)

slide-6
SLIDE 6

August 20, 2015 Ohio Stormwater Association

Locate Mason’s HUCs

  • https://gdg.sc.egov.usda.gov/GDGOrder.aspx
slide-7
SLIDE 7

August 20, 2015 Ohio Stormwater Association

Locate Mason’s HUCs

  • Three HUC 12 watersheds within Mason
slide-8
SLIDE 8

August 20, 2015 Ohio Stormwater Association

Mason’s Stream Impairments

slide-9
SLIDE 9

August 20, 2015 Ohio Stormwater Association

Mason TMDLs

  • Little Muddy Creek
  • Siltation = TMDL for Sediment
  • Muddy Creek
  • E Coli = TMDL for E Coli
  • Siltation = TMDL for Sediment

Now what are we supposed to do?

slide-10
SLIDE 10

August 20, 2015 Ohio Stormwater Association

Mason MS4 Permit

  • “You shall develop, implement, and enforce an SWMP

designed to reduce the discharge of pollutants from your small MS4 to the maximum extent practicable (MEP), to protect water quality, and to satisfy the appropriate water quality requirements of Ohio Revised Code (ORC) 6111 and the Clean Water Act.”

  • “Where applicable, BMPs shall be selected to address

U.S. EPA approved TMDL recommendations for identified water quality problems associated with MS4 discharges within your MS4’s watershed(s).”

slide-11
SLIDE 11

August 20, 2015 Ohio Stormwater Association

TMDL Data – Digging Deeper

Mason MS4 does not have a numeric WLA – focus on improving impaired streams to the MEP standard.

slide-12
SLIDE 12

August 20, 2015 Ohio Stormwater Association

TMDL Data – Digging Deeper

  • Bacteria Sampling

indicates non- attainment downstream

  • f WWTP only.
  • Conclusion – bacteria

impairment is not applicable to MS4 and

  • E. Coli TMDL is not

applicable to MS4

  • Need to focus on

Sediment impairment

slide-13
SLIDE 13

August 20, 2015 Ohio Stormwater Association

Sediment TMDL Information

  • The Qualitative Habitat Evaluative Index (QHEI)

evaluates six general aspects of physical habitat that include channel substrate, instream cover, riparian characteristics, channel condition, pool/riffle quality, and gradient.

  • Sediment degrades stream habitat.
  • “The QHEI captures the deleterious results of

excessive fine sediment loading therefore, it is appropriate to use in developing sediment TMDLs.”

  • Sediment TMDLs & Impairments are based on QHEI
slide-14
SLIDE 14

August 20, 2015 Ohio Stormwater Association

TMDL Data – Digging Deeper

slide-15
SLIDE 15

August 20, 2015 Ohio Stormwater Association

TMDL Data – Digging Deeper

  • Sediment Impairment
slide-16
SLIDE 16

August 20, 2015 Ohio Stormwater Association

Recommended Actions

  • Little Muddy Creek – 08-02
slide-17
SLIDE 17

August 20, 2015 Ohio Stormwater Association

Recommended Actions

  • “The cause of aquatic life use impairment at RM 3.22 on Little

Muddy Creek is poor substrate quality largely due to coarse substrates being embedded by sand. The primary source is the channelized nature of the stream in this area…”

  • “The sandy soils adjacent to an unnamed tributary to Swamp

Run (enters Little Muddy Creek at RM 3.4) and along the lower portion of Swamp Run are likely to be exacerbating the sediment issues on Little Muddy Creek. There is little buffering in this area and it is possible that a significant amount of sand

  • riginates from these soils…”
  • “The bank erosion that is likely occurring due to the stream

channelization can also be a significant source where the sandy soils of the banks are transported downstream following bank failure.”

  • “Buffers, bank stabilization and surface erosion controls are of

highest priority in this area of the HUC 12 watershed.”

slide-18
SLIDE 18

August 20, 2015 Ohio Stormwater Association

Recommended Actions

Agricultural Category= Coordinate with Local Soil and Water Conservation District

slide-19
SLIDE 19

August 20, 2015 Ohio Stormwater Association

Little Muddy: Next Steps for Mason

  • Walk the stream segments within the City tributary to RM 3.22

to evaluate bank erosion condition for possible sediment sources.

slide-20
SLIDE 20

August 20, 2015 Ohio Stormwater Association

TMDL Data – Digging Deeper

  • Sediment Impairment
slide-21
SLIDE 21

August 20, 2015 Ohio Stormwater Association

TMDL Data – Digging Deeper

NO ACTION REQUIRED FROM CITY OF MASON

slide-22
SLIDE 22

August 20, 2015 Ohio Stormwater Association

Recommended Actions

  • Little Muddy Creek – 09-01
slide-23
SLIDE 23

August 20, 2015 Ohio Stormwater Association

Recommended Actions

  • Two sites were impaired for recreation uses in this

watershed (Muddy Creek at river miles 2.5 and 0.54). Suspected sources are urban runoff from Mason, Lebanon and South Lebanon, and possible effects from the wastewater treatment plant.

slide-24
SLIDE 24

August 20, 2015 Ohio Stormwater Association

Recommended Actions

Agricultural Category= Coordinate with Local Soil and Water Conservation District

slide-25
SLIDE 25

August 20, 2015 Ohio Stormwater Association

Little Muddy: Next Steps for Mason

  • Walk the stream segments within the City tributary to RM 0.54 to

evaluate bank erosion condition for possible sediment sources.

slide-26
SLIDE 26

August 20, 2015 Ohio Stormwater Association

Putting TMDL in Perspective

  • Limitations
  • One EPA watershed evaluation every 15 years (2007, 2022)
  • Limited number of samples, at limited locations
  • Watersheds are dynamic – sampling provides a snapshot of water quality
  • Know your community
  • Do what makes sense
  • Other potential impairments – Algal blooms?
  • Resource Limitations
  • Do what you can
  • Focus on biggest issues/projects first
  • TMDL is a tool to help guide you
slide-27
SLIDE 27

August 20, 2015 Ohio Stormwater Association

Other TMDL Tools

  • Guidance and Fact Sheets (developed by NE Ohio)
  • http://geaugaswcd.com/yahoo_site_admin/assets/docs/TMDL_Factsheets.92115742.pdf
slide-28
SLIDE 28

August 20, 2015 Ohio Stormwater Association

Mason Stream Restoration Projects

  • Restoration Projects

7 Completed

  • Working together

Flood Reduction Projects Sanitary Sewer Projects Grant Opportunities Roadway Improvements

  • Look for Opportunity
slide-29
SLIDE 29

August 20, 2015 Ohio Stormwater Association

St Susanna’s

Project: 1,400 LF Stream Restored Partners: Church, School, SWCD, OEPA Funding: 319 Grant & Local In-kind Match Design: $69,000 Construction: $189,000

slide-30
SLIDE 30

August 20, 2015 Ohio Stormwater Association

St Susanna’s

Project: 1,400 LF Stream Restored Partners: Church, School, SWCD, OEPA Funding: 319 Grant & Local In-kind Match Design: $69,000 Construction: $189,000

slide-31
SLIDE 31

August 20, 2015 Ohio Stormwater Association

Quinn Park

Project: 1,400 LF Stream Restored Partners: OEPA Funding: Issue II & Local Match Design: $45,000 Construction: $206,000

slide-32
SLIDE 32

August 20, 2015 Ohio Stormwater Association

Marival/ Broadview Farms

Project: 3,200 LF Stream Partners: OEPA, HOA, SWCD Funding: 319 Grant & Local In-kind Match Design: $67,000 Construction: $155,000

slide-33
SLIDE 33

August 20, 2015 Ohio Stormwater Association

Questions?