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L udic ro us Mo de :
Ste ve n Rho de s, PE
F ro m Ca lib ra te d Mo de l to 30% De sig n
pre se nte d b y
in a Co mpre sse d Co nse nt De c re e Sc he dule
Pre se nta tio n Ove rvie w
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L udic ro us Mo de : F ro m Ca lib ra te d Mo de l to 30% De sig - - PowerPoint PPT Presentation
L udic ro us Mo de : F ro m Ca lib ra te d Mo de l to 30% De sig - - PowerPoint PPT Presentation
L udic ro us Mo de : F ro m Ca lib ra te d Mo de l to 30% De sig n in a Co mpre sse d Co nse nt De c re e Sc he dule pre se nte d b y Ste ve n Rho de s, PE Pr o jec t B ac kgr o und Pr o jec t Appr o ac h Mo deling Offline Sto r
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SAWS entered into Consent Decree with USEPA
2007-2013 Negotiations July 23, 2013 Lodged October 15, 2013 Entered 10-12 Year Duration
8 Major Components
Capacity, Management, Operation & Maintenance (CMOM) Early Action Program Condition Assessment and Remedial Measures Capacity Assessment and Remedial Measures Lift Stations Force Mains Water Quality Program Reporting
Pro je c t Ba c kg ro und
Central Basin Team: Freese and Nichols (FNI) and CH2M (now Jacobs)
SLIDE 4
Ce ntra l Ba sin
- Serves residential and
commercial portions of San Antonio, including downtown
- Main stem sewer conveys flow
along creeks and drainage ways
- Parallel sewers in many points
- Sewer in waterway at various
points
- Sewers come together at Rilling
Road location (former WWTP) and convey flow in 90-inch sewer to Dos Rios Water Reclamation Center (WRC)
Pro je c t Ba c kg ro und
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Ce ntra l Ba sin Hydra ulic Mo de l
- SAWS Master Planning
built and calibrated basin model
– Infoworks ICM v6.5 – 5-year, 6-hour assessment storm
- SAWS provided Base
Model which included:
– 30% I/I reduction – Early Action Projects
Approximately 80 MGD Reduction in Peak Flow with 15 MG Rilling Rd Offline Storage Facility
Pro je c t Ba c kg ro und
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Pre se nta tio n Ove rvie w
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Mo deling Offline Sto r age F ac ilities
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Pro je c t Appro a c h
- SAWS/HDR identified
28 Capacity Constraint Areas forwarded to BPC Team
- 14 CCAs Along “Main
Stem” of the Basin
- 14 CCAs In Upper
Reaches of Basin
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Ce ntra l BPC Pla n - Me tho do lo g y
- Develop and finalize alternatives
- Assessment & design
- Recommendation to move forward to the 30%
10% Design
- Perform field verifications/evaluations
- Develop cost data
- Allows rapid progress in final Design & Construction
30% Design
Pro je c t Appro a c h
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Submit 14 Draft TMs Present Main Stem Alternatives Submit Main Stem Draft TM Start 10% Design
10% Design Alternative Analysis August 2016 – May 2017
Submit 14 Final TMs & Start 30% Design Submit Main Stem Final TM Submit Basin Sensitivity Draft TM Submit Basin Sensitivity Final TM
Pro je c t Appro a c h
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How are we going to get this done?
- Assign the 14 CCAs and Main Stem between
4 Design Teams
- 1 Hydraulic Modeler on each Team
- All Teams Working In Parallel
SOLUTION
Pro je c t Appro a c h
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K e ys to Suc c e ss Pro je c t Appro a c h
- QC Plan
- Model loaded onto
SQL Server
- Custom VMWare
Remote Desktops
- Model DB
Organization
Allow Multiple Modelers in a Single DB Max out Hardware Specs to Minimize Model Run Time Minimize Confusion and Delay Maintain Quality Through Life of Project
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Pro je c t Appro a c h
- 14 Non Main Stem CCAs
hydraulically separate from each other and Main Stem
- Separate network for
each Non Main Stem CCA
- Single network for Main
Stem CCAs
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Pro je c t Appro a c h
Small Diameter Large Diameter
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I nfo Ma ste r Ove rvie w Pro je c t Appro a c h
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Pro je c t Appro a c h
E-Pipe 8” in Diameter 6’ Deep
Count of Defects > 1/100 lf E Pipe yes/no
Asset History
Diameter LD/SD
PACP Codes
Pipeburst/CIPP /Open-Cut Depth of Pipe >3’ but < 20’
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Pre se nta tio n Ove rvie w
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Mo deling Offline Sto r age F ac ilities
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Offline Sto ra g e F a c ilitie s
- 90” Line to Dos Rios WRC
has insufficient capacity
- Surcharges Main Stem
upstream
- 7.2 miles of Parallel 54”
PLUS Dos Rios Improvements
- Alternative Solution
Required
SLIDE 18
Rilling Road WWTP (1930)
All Sewers Lead to Rilling Road
Offline Sto ra g e F a c ilitie s
Rilling Road WWTP (2017)
SLIDE 19
Diversion Structure at Existing 90” 5 MG Storage basins Pump Station 72” Diversion Line 36” Cell Drain Line 42” Force Main Basin Fill Weirs
Offline Sto ra g e F a c ilitie s
SLIDE 20
Offline Sto ra g e F a c ilitie s
Pump Station 36” Cell Drain Line 42” Force Main Basin Fill Weirs Dummy Outfall Dummy Gate Basin Fill Weirs Basin Drain Sluice Gate
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Offline Sto ra g e F a c ilitie s
- Ran into initialization
issues
– Had drain gates closed – Basins would fill during initialization
- Developed simple RTC
– Drain gates open during initializations – Flow drains to dummy
- utfall
– Close gates when simulation starts
- Set initial gate
setting to open
- Define default rule
to close gate
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Offline Sto ra g e F a c ilitie s
Continuous 10 year Simulation to Estimate Frequency of Storage Activation
Date Duration (hr) Peak Intensity (in/hr) Volume Stored (MG) 5/28/2007 5 1.25 2.4 8/16/2007 12 1.25 7.2 9/8/2010 11/2 1.45/1.90 9.4 5/15/2012 6/4 0.80/1.25 3.7 5/25/2013 6/2 4.0/1.4 15+ 9/25/2015 7 1.75 15 Design Storm 6 5.9 11
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Offline Sto ra g e F a c ilitie s
- Custom VMWare
Desktop w/20 CPU cores
- 3 yr Sim took
approximately 1 day
- Total of 1 TB of
storage space
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Que stio ns &
Ste ve n Rho de s, P.E . | sdr@ fre e se .c o m | 210.298.3815
c o nta c t info rma tio n