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The Green and In-Between: Incorporating Green Infrastructure in Municipal Design
Tricia Hatley, P.E. – Freese and NicholsBoris Minot, EIT, CFM – Freese and Nichols
Development of LID Standard Details for the City of Dallas
LID Design Components
MAXIMIZE THE
QUALITYOF RUNOFF
CLEANERWATER
LESS FLOODING
MINIMIZE THE
QUANTITYOF RUNOFF
LID DRAINAGE CONCEPT
1. Quantity ControlPeak Flow AttenuationRunoff Volume Reduction
2. Quality ControlSedimentationFlotatationFiltrationBiological Processes
3. Pollutant RemovalTSSNutrientsBacteria 2
Additional Benefits of LID
• Case Studies Analyzing the Economic Benefits of Low Impact Development and Green Infrastructure Programs (EPA, 2013)
• Reducing Stormwater Costs through Low Impact Development Strategies and Practices (EPA, 2007)
Reduced Construction Costs
• A 2008 study in Seattle found neighborhoods with LID practices increased property values by 3.5-5% (The Effect of LOD on Property Values, Water Environment Federation)
Increased Property Values
3
Challenges
High Intensity Rainfall
Dual Function
Performance
Poor SoilsLack of
Available Space
Poor Design Practices
Poor Construction
Practices
Poor O&M Practices
Vegetation Failure
BMP Failure
4
Keys to Success
Constructible
Durable
Maintainable
Compatible
Visible
Context Sensitive
5
• Adoption and inclusion of LID Standard Details into design standards
• Updated Drainage and Paving Manuals
• LID Training and Maintenance Presentations for City staff
• LID becomes the accepted and preferred design approach
City of Dallas - Goals
6
Creating Standard Details
7
Objectives
Input from stakeholders
Determine appropriateness for Dallas
Research LID Programs Nationwide
8
Curb Extension-Corner -Mid-block
Tree Box Filter-Single-In Series
Enhanced/Vegetated Swale
Bioretention Planter-With Parking-Without Parking
Bioswale
Bioretention Planter-With Parking-Without Parking
Curb Extension-Corner -Mid-block
BioswaleEnhanced/Vegetated SwaleTree Box Filter
-Single-In Series
9
Bioretention Planters
City of Philadelphia Green Streets Design Manual10
Bioretention Planters
California Department of Transportation 11
Bioretention Planters
12
Curb Extensions
City of Philadelphia Green Streets Design Manual 13
Curb Extensions
Portland Green Streets 14
Curb Extensions
15
Bioswales
New York City Urban Design Manual16
Bioswales
A Green Footprint LLC 17
Bioswales
18
Enhanced/Vegetated Swale
City of Philadelphia Green Streets Design Manual, 2014 19
Enhanced/Vegetated Swale
20
Enhanced/Vegetated Swale
21
Tree Box Filter
City of Philadelphia Green Streets Design Manual, 2014 22
Tree Box Filter
Grande Dunes Marina, Contech Engineered Solutions
23
Tree Box Filter - Single
24
Tree Box Filter - Series
25
LID General Notes
26
Design ComponentsTrench Drain Plants & Shrubs
Cleanout Overflow Structure
Edge Treatments
Energy DissipatorsUnderdrain
Storage Media
27
Landscaping Planting Media
Crepe Myrtle
American Beautyberry
Cardinal Flower
Eastern Redbud
False Indigo
Joe Pye Weed 28
Public Signage
Lidsigns.com Bagby Street, Houston, TX
Educate the pubic about LID goals, functions and importance
Identifies lid facility for maintenance crews
29
Maintenance and Inspections
30
Maintenance and Inspections
31
Maintenance Protocol
32
Training for City of Dallas Staff
1st Session: September 2016• Introduction of LID and the details
2nd Session: August 2017• Maintenance
33
Questions?
• Tricia Hatley, P.E. – Freese and Nichols –[email protected]• Boris Minot, EIT, CFM – Freese and Nichols – [email protected]
