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Trash Capture Device Installations
Municipal Maintenance Stormwater WorkshopKevin McGillicuddy, P.G.Roscoe Moss Company
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Topics
• Large scale screen device design criteria
• Installation Examples
• Maintenance Practices
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Screen Design Criteria
• Site SelectionProvide adequate
access for installation
and future
maintenance events
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Screen Design Criteria• Target Flow Calculator
Peak flow (Q) determined using formula Q = C * I * A
C = runoff coefficient : 0.8 I = 1 yr-1 hr rainfall intensity : 0.5 in/hr A = tributary drainage area : 150 acresQ = Target Flow = : 60.1 cu.ft/sec
Bypass System Must be Designed to Transfer Flows Above Target Flow Rate
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Overflow Bypass Sections
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Screen Design Criteria• Device Size– Requires determination of diameter and length
Diameter: - match outfall dimensions- flow line of treated storm event
Length: - as required to treat target flow with debris in place - capacity to hold captured debris between cleaning events
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Screen Configuration Options
Single linear configuration Parallel multi-screen configuration
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Screen Configuration Options
Single linear configuration Parallel multi-screen configuration
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City of AntiochDetention basin area – 6 acresDrainage area: 200 acresTarget flow: 60 cfs
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30 ft – 42 in dia screenTreatment capacity 60 cfs up when ¼ full
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Brentwood, CA15 ft – 48 in screen, treatment capacity 23.4 cfs when ½ full
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Pittsburg, CA50 ft - 36in screen, treatment capacity 55 cfs when 1/2full
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Milpitas, CAcombination radial , semi-circular, and flat panels
30 ft – 42 in screenTreatment capacity 60 cfs when ½ full
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Maintenance Procedures
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Video
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Questions ?Please Contact :
Kevin McGillicuddyRoscoe Moss Company
4360 Worth StreetLos Angeles, CA 90063
Tel: (323) 263-4111www.roscoemoss.com
Email:[email protected]
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