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Manufactured System Design w w w. t r a n s p o r t a t i o n . o h - - PowerPoint PPT Presentation
Manufactured System Design w w w. t r a n s p o r t a t i o n . o h - - PowerPoint PPT Presentation
Manufactured System Design w w w. t r a n s p o r t a t i o n . o h i o . g o v 1 Manufactured Systems L&D Vol. 2 Section 1117.1 Provides quality treatment only w w w. t r a n s p o r t a t i o n . o h i o . g o v 2 Manufactured System
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Manufactured System Treatment Processes
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Design Process
Treatment Goals Siting Analysis Manufactured System Sizing Other Considerations
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Design Process
Treatment Goals Siting Analysis Manufactured System Sizing Other Considerations
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Project Example
Intersection improvement Add turn lane All within existing right-of-way
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Project Example
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Project Example – Treatment Goals
Project EDA = 2.28 ac All within existing right-of-way Aix = 2.28 ac; Ain = 0.0 ac T% = [(Aix x 20)+(Ain x 100)] / (Aix + Ain) T% = [(2.28 x 20)+(0.0 x 100)] / (2.28 + 0) T% = 20% 20% x 2.28 ac = 0.46 ac
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Project Example – Treatment Goals
Project EDA = 2.28 ac >= 1 ac
Need a post-construction BMP
All redevelopment
Need to treat 0.46 ac (20%)
All in existing right-of-way
All existing right-of-way considered impervious Therefore no “new impervious area in new permanent right-of-way” Water quality treatment only required
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Design Process
Treatment Goals Siting Analysis Manufactured System Sizing Other Considerations
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Siting Analysis
Manufactured systems near storm sewers Avoid underground utilities Avoid pipes at depths greater than 10 ft Avoid trunk lines (pipes with WQF greater than 6 cfs) Site system outside of paved areas for maintenance
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Footprint
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Maximum Depth
Contech CDS Model 4045-8-C
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Maximum Depth
Image: Contech
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No Trunk Lines
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Siting Analysis
Tributary area = 12.42 ac
- Trib. Area within R/W = 1.94 ac
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Design Process
Treatment Goals Siting Analysis Manufactured System Sizing Other Considerations
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Manufactured System Sizing Design after January 2019 Water Quality Flow (WQF): Q = CiA Calculate time of concentration to determine i
Tc = overland + shallow conc. + pipe flow To = 16 min Ts = 7 min Tp = 2 min
Tc = 16 + 7 + 2 = 25 min
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Manufactured System Sizing Design after January 2019 Water Quality Flow (WQF): Q = CiA
C = 0.41 i = 1.13 in/hr A = 12.42 ac.
WQF = 0.41 * 1.13 in/hr * 12.42 ac WQF = 5.75 cfs ODOT Type 4
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Manufactured System Sizing
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BMP Calcs Spreadsheet
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Design Process
Treatment Goals Siting Analysis Manufactured System Sizing Other Considerations
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Sample Plan Note W103
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Manufactured System Considerations
Vacuum truck maintenance every 4 – 12 months
Access and safety for maintenance crew Need to close lanes
- Max. depth of vac truck suction (~20 ft)
- Max. flow 6 cfs
May need to separate off-site flows
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Manufactured System Considerations
ODOT Qualified Products List – 31 Products Manufactured Water Quality Structure (SS- 995)
Advance Drainage AquaShield Bio Clean Contech Environment 21 Hydro Int.
All hydrodynamic separators
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Manufactured System Considerations
Some Cartridge Filters: 80% TARP TSS Distribution Hydrodynamic Separators: 80% ODOT Sand, 50% TARP Catch Basin Inserts: May Capture > 200 microns
Cartridge (Contech)
- Hydro. Sep. (Contech)
Basin Insert (Contech)
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Research: Particle Size Distribution
Image: 3P Technik UK
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10 20 30 40 50 60 70 80 90 100 1 10 100 1,000
Percent Finer Particle Size (µm)
Sediment Particle Distributions
NJDEP Test US Silica OK110 US Silica F110
80% TSS Removal
Research: Particle Size Distribution
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Questions ?
Jon Prier, P.E. jonathan.prier@dot.ohio.gov 614-644-1876