case study: i-95 section gir - rain garden maintenance

Case Study: I-95 Section GIR -Rain Garden Maintenance

Megan Farnsworth, EIT

October 16, 2019

06/19/2018

Case Study: I-95 Section GIR - Rain Garden Maintenance

1. I-95 Section GIR Background

2. GR2 Maintenance Inventory

3. Forebay Maintenance

4. Lessons Learned


1. I-95 Section GIR Background



4. Lessons Learned



I-95 Girard Avenue Interchange Reconstruction (GIR)

3 miles of I-95 Highway (Race Street to Allegheney Avenue)

Multi-phase project (2000-present)

70+ SMP devices throughout project at completion

University Monitoring Program for SMPs since 2016• Temple University• Villanova University

I-95 Section GIR Background


Allegheney

Race

Girard

• Applied lessonslearned from GR2

• Will continuemonitoring

GIR SMP Maintenance



GR2 GR3

GR4

GR5

GR6

GR2&3: Complete GR4: Construction GR5&6: In Design• Temple University

contractedlandscapers

• Monitor manpower• Recommend design

changes

• Applied lessonslearned from GR2&3

• Apply lessons fromGR4 as constructed

• Long-termmaintenance planfor PennDOT

Active GIR SMPs

SMP A SMPs C,D,&G SMPs E&F

SMP H SMPs I&J SMP P01


08/07/2019 05/14/2019 05/31/2019

08/07/2019 05/14/2018


05/31/2019

I-95 – Phase GR2 Aerial View


08/18/2018

08/18/2018

SMPs I&JSMP H SMPs E&F

SMP A

SMPs C,D,&G

SMP P01


Delaware Ave

Delaware Ave

Shackamaxon St

Shackamaxon St


1. I-95 GIR Background



4. Lessons Learned


Vegetation - 225 cubic yards• Mow lawns• Remove weeds• Trim overgrown vegetation• SMP A – “Minimal Maintenance

Routine”

Trash - 146 x 42-gallon bags• Collect trash• Needles

Manpower - 1416 man hours• Inspect after storm events• Spring/summerà 2 trips per month• Fall/winter à 1 trip per month

Maintenance Needs (July 2017 – June 2019)

GR2 Maintenance Inventory

07/25/2017


Manpower Observations

Overall Observations• 1-2 days/month• Year 2 – scheduling issues

Low Maintenance Requirements• SMP A – “Minimal Maintenance Routine”• SMP H – less attention on interior• SMP I&J – poor performance

High Maintenance Requirements• SMPs E&F – complaints

• Tedious maintenance• More visits

• SMPs C,D,&G – public presentation• Tours• Publications


Site Total(2yrs)

Avg permonth

A 238 hrs 9.9 hrsCDG 446 hrs 18.6 hrsEF 420 hrs 17.5 hrsH 207 hrs 8.6 hrsIJ 105 hrs 4.4 hrs


Manpower per Month



Vegetation Debris Observations

Overall Observations• SMPs I&J lowà poor performance• SMPs C,D,&G and SMPs E&F highest in

vegetation and manpower

NB-side vs SB-side of Highway• Year 1 à SB-side higher totals• Sunlight impacts growth• Continue studying

Fenced vs Open to Public• Similar totals• Year 1 – SMPs E&F (fenced)• Year 2 – SMPs C,D,&G (open to public)


Site Total (2yrs)A 48.0 yds

CDG 53.0 ydsEF 58.0 ydsH 46.5 ydsIJ 19.0 yds


Vegetation Debris Collected per Month

AnnualTotal

- 21.5 yds- 30.0 yds- 32.0 yds- 49.5 yds- 16.0 yds


AnnualTotal

- 26.5 yds- 23.0 yds- 14.5 yds- 8.5 yds- 3.0 yds


Trash Collection Observations

Overall Observations• SMPs C,D,&G highest total• SMPs H,I,&J next to construction of

private developments

NB-side vs SB-side of Highway• Study in GR3&4

• SB-sideà Residential• NB-sideà Along Delaware Ave

Fenced vs Open to Public• Fencedà less trash• SMP C,D,&G had additional collection by

neighbors


Site Total (2yrs)A 28.1 bags

CD&G 64.8 bagsE&F 24.6 bags

H 15.1 bagsI&J 13.6 bags


Trash Collected per Month


AnnualTotal

- 8.1 bags- 20.8 bags- 5.6 bags- 14.1 bags- 12.6 bags

AnnualTotal

- 20.0 bags- 44.0 bags- 9.5 bags- 10.5 bags- 1.0 bag






4. Lessons Learned


Forebay Background

Forebay Maintenance

GR2 – SMPs w/o forebaysDesign à Riprap

• Reduce velocityObservations

• Erosion present• Sediment buildup• Cigarettes

GR3&4 – SMPs w/ forebaysDesign à Paver forebay

• Pre-treatment• Reduce velocity

• Observations• Easier maintenance• Reduce erosion

07/25/2017

06/25/2018


SMP P01 (Phase GR3)

08/13/2018

Forebay Maintenance


ImproperConstruction• Clogging during

construction• Reduced

infiltration capacity

MulchErosion• Unanticipated

sediment transport• Covers infiltrating

area

InvasiveWeeds• Tedious

maintenance• Could impact

paver placement

Maintenance Notes

Forebay Maintenance

08/07/201908/07/201908/21/2018






4. Lessons Learned


Public Reaction to SMPs

CommunityInteraction Wildlife Public Interest

Complaints aboutOvergrowth

Homeless“Camp” Storage Vandalization

Lessons Learned

10/05/2016

07/25/2017 08/07/2019

05/31/2019

10/18/2018

10/19/2017


Fenced SMPs

– Reduces trash• Blocks debris blown by wind• No pedestrian traffic

– Reduces vandalization &trespassing• Steep embankment (SMPs

E,F,&H)• Neighboring properties

Lessons Learned

Positives Negatives– No public access

• More complaints withbordering properties

• Public cannot be involved

– More difficult maintenance• Vegetation growth through

fence• Cannot mow perimeter

03/01/2019 08/05/201908/05/201903/01/2019


SMPs E&F Vegetation

Lessons Learned

SMP EReceives Highway Runoff

SMP FTemporary Bypass

08/07/2019 08/07/2019

Comparable vegetation growth


Summary

Lessons Learned

• Monthly visits, more frequent in summer• Little variation between functioning SMPs• Can’t avoid trash cleanup

SMPMaintenance

• Reduces erosion• Pre-treatment avoids clogging SMP (cigarettes)• Room for improvement to reduce maintenance

ForebayDesign

• Maintenance trends• Long term performance of forebays• Community outreach

FutureStudies


Megan Farnsworth, [email protected]

http://www.95revive.com/

October 16, 2019

Questions?

case study: i-95 section gir - rain garden maintenance

Documents