resiliency the new sustainability - pafpm

WEBINAR SERIES

Resiliency the New Sustainability

Sponsored by

ABOUT US

The Pennsylvania Association of State Floodplain Managers is a statewide organization of floodplain managers, engineers, planners, local, state and federal officials, and water resource professionals whose purpose is to:

• Promote public awareness of integrated floodplain management;

• Promote a liaison and to encourage the exchange of ideas and information among individuals and groups concerned with floodplain management

• Inform concerned individuals and groups of pending floodplain management legislation, regulation, and related matters in order to advance the effective implementation of floodplain management

MEMBERSHIP

A PAFPM membership gives you access to training, workshops, newsletter, conferences, and networking opportunities.

Memberships are valid for 1 year (July 1 - June 30)

Contact us at flood@pafpm.org with questions about membership.

NEWS

Just added! FEMA 2020 Non-Disaster Grant Opportunities through PEMASeptember 29, 2020 @ 1PMRegistration @ PAFPM.org

Resiliency the New Sustainability Webinars:Wednesdays in September 2020 @ noonNext Wednesday: NFIP TransformationRegistration @ PAFPM.org

PAFPM- Floodplain Management Training:March 16/17thHarrisburg, PASAVE THE DATE

HOUSEKEEPING

PAFPM Webinars:

• Attendees will be muted during presentations• Presentations will be approx. 1 hour, 30mins for Q&A• Use the Q&A box during the presentation• Certificates will be emailed to attendees• If you encounter any issues during the webinar email us

at flood@pafpm.org

WEBINAR SERIES

Resiliency the New Sustainability

Sponsored by

RIVERINE

DAM/LEVEE

INCREASED RAINFALL

HURRICANES/TROPICAL STORMS

Types of flooding in PA

SEA LEVEL RISE

URBAN/INFRASTRUCTURE

LAKE

TIDAL

Types of flooding in PA

Flood Resiliency in the News

PRESENTERSKara KalupsonMS4 CoordinatorRETTEW

Mark MetzlerGroup ManagerRETTEW

Funding Options for Municipalities Implementing

Stormwater BMPs

Presentation OutlineTopics

Stormwater, Flooding, and Water Quality

MS4 Permit – Pollutant Reduction Plans

Reducing Sediment, Nitrogen, and Phosphorous

How Municipalities are Funding Projects

Summary

Developed Areas

Impervious Areas – Prevent stormwater infiltration

Water is conveyed offsite to streams via storm pipesToo much water going to the same place

Water flows across the land picking up pollutants

Chemicals – oil, gas, pesticides, medicinalsBacteria – sewage and manureTrashNutrients – including grass clippings

Rural Areas / Farms

Pasture and crop fields adjacent to streamsLivestock access to streams destroys banks

They are all related

Stormwater, Flooding, and Water Quality

2010 Urbanized Area (U.S. Census Data)

MS4 Permit - Pollutant Reduction Plans

Stormwater BMPs

Rain gardens and bioretention basinsBioswales and vegetated swalesDry extended detention basinsConservation landscaping/meadow plantingsRiparian forest buffers and vegetated buffersStream restoration and stabilization

Benefits

Plants reduce stormwater speed and trap sedimentPlants uptake water and nutrients for growthMore groundwater infiltration Increase food and habitat for birds, insects, small animals

Stormwater BMPs to reduce stormwater volume and pollutants

Paradise TownshipDetention Basin Retrofit

PA DEP 2017 Urban Stormwater Best Management Practices Grant

Awarded $142,082 in August 2017

Existing basin deficiencies

Sinkholes

Small storms passed straight through

No water quality treatment

Paradise TownshipDetention Basin Retrofit

Reduces stormwater volumes and rates during storm events

Two sediment forebays filter sediment during small storms

Native grasses filter pollutants and uptake nutrients

Design to drain within 72 hours (3 days)

Sediment reductions = 30,695 lbs/year

Total project cost $252,000.00

Township contribution $50,000.00

Private landowner contribution $60,000.00

Paradise TownshipDetention Basin Retrofit

Paradise TownshipVegetated Swale

Lancaster County Community Foundation 2020 Watershed Implementation Grant

Awarded $27,500 in March 2020

Existing concrete-lined swale

No water quality treatment

Paradise TownshipVegetated Swale

Reduces stormwater volumes and rates during storm events

One sediment forebay filters sediment during small storms before discharging into a detention basin

Native grasses filter pollutants and uptake nutrients

Treats stormwater from 122-acre drainage area

Sediment reductions = 26,320 lbs/year

Total project cost $35,500.00

Township contribution $8,000.00

Rapho TownshipDetention Basin Retrofit

PA DEP 2017 Urban Stormwater Best Management Practices Grant

Awarded $161,360 in August 2017

59-acre drainage area – suburban residential

Existing basin deficiencies

Small storms passed straight through

No water quality treatment

Rapho TownshipDetention Basin Retrofit

Reduces stormwater volumes and rates during storm events

Two sediment forebays filter sediment during small storms

Native grasses filter pollutants and uptake nutrients

Design to drain within 72 hours (3 days)

Sediment reductions = 28,375 lbs/year

Total project cost $171,360.00

Township contribution $10,000.00

Rapho TownshipDetention Basin Retrofit

West Hempfield TownshipVegetated Swale and Bioretention Basins

Lancaster County Community Foundation 2020 Watershed Implementation Grant

Awarded $75,000 in March 2020

Diverting stormwater runoff to a vegetated swale and bioretention basin

Existing stormwater discharges into small stream

West Hempfield TownshipVegetated Swale And Bioretention Basins

Diverts stormwater out of headwaters of a small stream

Native grasses filter pollutants and uptake nutrients

Amended soils promote infiltration

Design to drain within 72 hours (3 days)

Sediment reductions = 18,818 lbs/year

Total project cost $162,000.00

Township contribution $87,000.00

West Hempfield TownshipVegetated Swale And Bioretention Basins

West Hempfield TownshipStormwater Management and Stream Restoration

2019 NFWF Pennsylvania Local Government Implementation Grant

Awarded $200,000 for stormwater management and stream stabilization

Private landowner

UNT Chiques Creek

West Hempfield TownshipStream Restoration

Construct stormwater basin at pipe

Regrade and stabilize eroding streambanks

Riparian buffer – native shrubs and grasses

Sediment reductions = 56,548 lbs/year

Construction 2022

Total project cost $302,000.00

Township contribution $102,000.00

Ephrata TownshipStream Restoration – Cocalico Creek

DCNR - 2019 NFWF Park Rehabilitation and Development – Rivers Conservation Grant

Awarded $200,000

16-acre municipal park along the Cocalico Creek

Stream restoration/floodplain restoration

Riparian buffer

Kayak launch and ADA accessible fishing pier

Ephrata TownshipStream Restoration

Regrade eroding streambanks

Connect floodplain to the stream channel

Riparian buffer – native trees, shrubs, grasses

Sediment reductions = 70,910 lbs/year

Construction 2021

Total project cost $400,000.00

Township contribution $200,000.00

Penn TownshipStream Restoration – Chiques Creek

2019 NFWF Pennsylvania Local Government Implementation Grant

Awarded $200,000 for 1,850 LF stream restoration

Private landowner

Chiques Creek is municipal boundary line –opportunity to share pollutant reduction credits

Penn TownshipStream Restoration

Regrade and stabilize eroding streambanks

In-stream fish habitat structures

Riparian buffer – native trees, shrubs, grasses

Sediment reductions = 83,028 lbs/year

Construction 2022

Total project cost $310,200.00

Township contribution $110,200.00

Mountville Borough

Notified of a $200,000 in September 2020

Strickler Run Watershed

Sediment reductions: 25,818 lbs/year

Constructed Wetland and Dry Extended Detention Basin

Total project cost $250,000.00

Manheim Borough

8-acre municipal park along the Cocalico Creek

Stream Restoration/Floodplain restoration

Riparian Buffer

ADA Pathway

Sediment reductions = 136,358 lbs/year

Construction 2021

Stream Restoration – Chiques Creek

Funding ReceivedDCNR Community Conservation Partnerships $250,000.00

Growing Greener $99,000.00

DCED Greenways Trails Recreation Grant $250,000.00

DCED Watershed Restoration and Protection $300,000.00

Total project cost $1.6 million

SummaryLocal, State, and Federal Grants for Water Quality Projects

Lancaster County Municipality Grant Award

Paradise Township 169,582.00$ Rapho Township 161,360.00$ West Hempfield Township 275,000.00$ Ephrata Township 200,000.00$ Penn Township 200,000.00$ Mountville Borough 200,000.00$ Manheim Borough 899,000.00$

Total 2,104,942.00$

Thank You!

Kara Kalupson, RLA, ASLA, CPMSM, CBLP

Senior MS4 Coordinator

RETTEW Associates, Inc.

717.431.3706

kara.kalupson@rettew.com

Streams in Equilibrium are Resilient

Mark A. Metzler

Senior Environmental Scientist

RETTEW Associates, Inc.

(717) 723-0486

mmetzler@rettew.com

Stable river (stream) systems maintain a dynamic equilibrium (stable does not mean static)

IN NATURE….1. A stable stream does migrate laterally

A. So expect it to happen and don’t encroach on its “wiggle room”

2. A stable stream system does erode and does deposit materialA. Sediment load, sediment size remain fairly consistent

3. A stable stream system tends to maintain a configurationA. SlopeB. WidthC. DepthD. Sinuosity

4. A stable stream system maintains flow capacity (how much water/sediment load it transports)

5. A stable stream system includes an “attached” floodplain

6. A stable stream system supports its aquatic community

7. A stable stream system has the correct vegetation - trees, shrubs, herbs/grasses (usually)

Want to destroy a stable river (stream) system?

1. Attempt to stop its lateral movement

2. Undo the natural balancing act of erosion and deposition

3. Change its configurationA. SlopeB. WidthC. DepthD. Sinuosity

4. Add more water and make the stream adjust

5. Un-attach its floodplain

6. Aquatic community will change as result

7. Change the riparian vegetation

So we destroyed our stable river (stream) system in a number of ways over a number of years, and some of our manmade creations have to stay because we need it. So now what?

1. All is not lost - you can probably restore the stream and have a new version of equilibrium.

2. Restore, fix, stabilize – How?A. If the stream wasn’t impaired (broken), what would it be like?

ii. Various stream typesB. Can you eliminate any negatively influencing factors?C. What negatively influencing factors are you stuck with and can you accommodate them?

3. Do you have the necessary money, permission, know-how, time and desire?

AS BEST POSSIBLE, DON’T FORCE A STREAM INTO BEING WHAT IT’S NOT…OR WHAT IT SHOULDN’T BE…

Design for:The stream typeThe aquatic community (that should be present)Accommodating those unnatural, influencing factors you can’t eliminate

Legacy Sediment Considerations

Floodplain re-connected

QUESTIONS

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