Chris Bergerson, PWD Bethany Boisvert, AKRF Bergerson, PWD Bethany Boisvert, AKRF. $1.67 billion ......
Transcript of Chris Bergerson, PWD Bethany Boisvert, AKRF Bergerson, PWD Bethany Boisvert, AKRF. $1.67 billion ......
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Inspection and Maintenance Program Development for the City of
Philadelphia’s Green Stormwater Infrastructure
Chris Bergerson, PWDBethany Boisvert, AKRF
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$1.67 billion
$345 million
Green Stormwater Infrastructure
Adaptive Management
Traditional Infrastructure
GREEN CITY, CLEAN WATERS
$420 million
The City of Philadelphia’s Program for Combined Sewer Overflow Control$2.4 Billion Investment over the next 25 years
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Ramping UP for Implementation
• A 5‐year ramp‐up period is planned to increase PWD production of GSI
• Ramp‐up gradually increases GA target to a level that can be continued for remaining 20 years of program
• First 5 years used to ramp up to an average of 290 GA per year to meet 25 year goal of 6560 GA
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1 3 5 7 9 11 13 15 17 19 21 23 25Implementation YearAn
nual Green
ed Acres
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Green Infrastructure Maintenance Manual
Delivery: June 1, 2014
Metric: Greened Acres
Defining maintenance activities, frequency and efficiencies for long‐term success of each type of
green stormwater infrastructure
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www.phillywatersheds.org
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SMPs – 2010 Program
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SMPs – 2011 Program
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Program Components
•Inspection•Maintenance•Reporting•Site‐specific protocols
Inspection and Maintenance Program
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Inspections–Condition Assessment
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Inspections–Issue Identification
0.005.0010.0015.0020.0025.0030.00
3/23/2010 5/12/2010 7/1/2010 8/20/2010 10/9/2010 11/28/2010
Volume (cf)
Sinkhole Void Volume
Sinkho
le filled
Sinkho
le filled
Sinkho
le filled
Sinkho
le filled
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SITE 10: PALMERInspection
Date:_____________________________
Measurements
Feature Structure Type Measurement March April May June July August Sept October November
10_02 Street inlet 1 TOG_TOW (in) 40.8(NW inner) TOG_TOS (in) 67.9
10_03 Observation well 1 TOG_TOW (in) 57.5(NW) TOG_TOS (in) 62.4
10_11 Street inlet 2 TOG_TOW (in) 47.6(SE) TOG_TOS (in) 79.5
10_12 Observation well 2 TOG_TOW (in) 64.1(SE) TOG_TOS (in) 66.1
10_17 Steet inlet 3 TOG_TOW (in) 57.1(NW outer) TOG_TOS (in) 85.7
Inspections–Monitoring
•Sediment accumulation•Water levels•Settling / sinkhole
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Inspections–Monitoring
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Distance from Top of Grate (inches)
Structure Bottom
Invert
Sediment Level
Inlet cleaned
Sediment Levels within Inlet
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Inspections—Photo Documentation
2010
2011
April
March
August
May August
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Number of Crew Members (including foreperson): Start Time:
Crew Organization: End Time:
PM FP LB1 LB2 LB3 MS Other Item Quantity Units Item Quantity Units
Site: ____________________
Date: ____________________
TaskLabor Effort Materials (Added or Removed) Materials (Added or Removed)
TRASH REMOVAL
SEDIMENT REMOVAL
ORGANIC MATERIAL (LEAVES/WOOD) REMOVAL
INVASIVE/NON‐TARGET PLANT REMOVAL ‐ HAND
INVASIVE/NON‐TARGET PLANT REMOVAL ‐ MECHANICAL
INVASIVE/NON‐TARGET PLANT REMOVAL ‐ HERBICIDE
PRUNING
Inspections–Maintenance Tracking
•Tasks performed•Labor effort•Labor skill•Materials
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Maintenance
•Trash and sediment removal•Weeding, pruning, etc.•Structural repairs•Erosion control•Reseeding•Watering
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Labor 77%
Materials 23%
Maintenance CostsLabor and Materials as Percent of Annual Maintenance Cost
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Percent of Annual Maintenance Cost by Task
3% 3%4%
4%
7%
36%
43%
Erosion Control
Mulching/top dressing
Design/Installation Enhancement
Oversight
Minor structural repairs
Cleaning
Vegetation care
1. Planting2. Watering3. Weeding (invasive or non‐target)4. String trimming
1. Sediment/debris removal2. Trash removal3. Deteriorated porous pavement removal4. Organic material removal
Maintenance Costs
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Percent of Annual Maintenance Cost by Site
Maintenance Costs
1% 2% 2% 2%6%
16%
16%19%
36%
Clark Park
Jefferson Square
Liberty Lands
Herron Playground
West Mill Creek
Waterview Recreation Center
Cliveden Park
47th and Grays Ferry
Columbus Square
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•Trash•Pollution•Vandalism•Car accidents•Size constraints•Heat and exposure
Challenges in the Urban Environment
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•Routine maintenance tasks•Maintenance standards•Required equipment•Crew size and skill•Frequency of visits•Frequency of tasks•Responsible party
Site‐Specific Protocols
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•Maintenance friendly design•Enhanced pretreatment•Proven performers plant lists•Frequency of maintenance•Material reuse•Prevention of theft/vandalism•Product testing
Feedback for Design and Maintenance
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•Improving logistics•Reducing labor effort•Green infrastructure crews•Reusing materials on site•Standardizing materials•Green infrastructure awareness•Improved construction oversight•Increasing maintenance independence
Scaling Up
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Montgomery Ave. Tree TrenchHurricane Irene
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Montgomery Ave. Tree TrenchTropical Storm Lee
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Palmer St. Tree TrenchHurricane Irene
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Water Depth SWT-B4 (upslope) Water Depth SWT-A4 (downslope)
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Palmer St. Tree TrenchTropical Storm Lee
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Water Depth SWT-B4 (upslope) Water Depth SWT-A4 (downslope)
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Bethany BoisvertAKRF, Inc.Environmental, Planning, and Engineering Consultants
THANK YOUhttp://www.phillywatersheds.org
Chris BergersonPhiladelphia Water DepartmentOffice of Watersheds