City of St. Pete Beach Model Capacity Report Addendum · Bentley SewerGEMS (Bentley SewerGEMS ... City of St. Pete Beach Model Capacity Report Addendum ... Bentley SewerGEMS (Version

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Model Capacity Report - Addendum

City of St. Pete BeachModel Capacity ReportAddendum

Prepared for:City of St. Pete Beach155 Corey AvenueSt. Pete Beach, FL 33706

Prepared By:Kimley-Horn and Associates, Inc.655 North Franklin Avenue, Suite 150Tampa, FL 33602

__________________Jordan W. Walker, P.E.FL #78652

© Kimley-Horn and Associates, Inc. CA 00000696 January 2017 Tampa, Florida 148404010

THIS DOCUMENT, TOGETHER WITH THE CONCEPTS AND DESIGNS PRESENTED HEREIN, AS AN INSTRUMENT OF SERVICE,IS INTENDED ONLY FOR THE SPECIFIC PURPOSE AND CLIENT FOR WHICH IT WAS PREPARED. REUSE OF ANY IMPROPERRELIANCE ON THE DOCUMENT WITHOUT WRITTEN AUTHORIZATION AND ADAPTATION BY KIMLEY-HORN ANDASSOCIATES, INC. SHALL BE WITHOUT LIABILITY TO KIMLEY-HORN AND ASSOCIATES, INC.

City of St. Pete BeachModel Capacity Report AddendumJanuary 2017 0

Authorization

On February 24, 2015 the St. Pete Beach City Commission authorized the City Manager to engage theservices of Kimley-Horn and Associates, Inc. (Kimley-Horn) to provide general engineering services forthe Inflow and Infiltration Study. Task 4 included the following scope to create a hydraulic and statisticalmodel of the City’s sanitary sewer system with the following goals:

The Engineer will develop a hydraulic and statistical model using the management software package,Bentley SewerGEMS (Bentley SewerGEMS, 2015), to analyze the City’s entire sanitary sewer system.Model will be developed using the following data sources.

· Determine remaining flow capacity within the system for a maximum of 3 projectedscenarios

· Identify potential problem areas and recommendations for future capital improvementplans to fix outstanding issues.

· Create a City wide map showing capacity ratings at each lift station and within existinggravity pipes and force mains.

This Model Capacity Report was completed in September 2016 and was published via the City of St. PeteBeach’s website.

Along with the sewer capacity within the limits of St. Pete Beach, the City also requested a summary ofthe sewer capacity of the force main pressure system downstream of the Pump Station No. 1 (PS#1).

Combined Pressure System

All the City of St. Pete Beach’s sewer flows discharge to PS#1 which is part of a combined force mainpressure system that eventually outfalls to the City of St. Petersburg Lift Station No. 61.

There are five separate lift stations, including PS#1, that are connected to the combined force main priorto Lift Station #61 per the City of St. Petersburg LS#61 Technical Memorandum completed by BoyleEngineering Corporation (Boyle, 2006).

Estimated Pump Capacity

Using the information from the City of St. Petersburg LS#61 Technical Memorandum completed by BoyleEngineering Corporation and updated information from the PS#1 rehabilitation, completed in August2014, a hydraulic model was developed to estimate the pumping capacity of PS#1.

The total pumping capacity of the station with three pumps in service and one pump as a commonbackup is 7.92 Million Gallons Per Day (MGD) at 145 feet of total dynamic head (TDH) under peakoperating conditions. The estimated pumping capacity was calculated by use of the hydraulic modelwhich accounts for the back pressure of the contributing pump stations that manifold into the combinedforce main discharging to the City of St. Petersburg’s Lift Station #61. See Figure 1 for a graphicalsummary and Appendix A for the model results.

Calculations are subject to change with conditions that may occur within the force main system.


Figure 1 – Hydraulic Model Summary


Estimated Peak Hourly Flow (PHF)

The Pump Station No. 1 Preliminary Design Report and the Model Capacity Report completed by Kimley-Horn and Associates, Inc. estimates Peak Hourly Flow (PHF) into PS#1 is approximately 7.7 MGD(Kimley-Horn and Associates, Inc. 2016) (Kimley-Horn and Associates, Inc. 2013).

This estimated peak hourly flow is anticipated to decrease as the City of St. Pete Beach reduces its inflowand infiltration through their three major rehabilitation projects approved in October 2016 listed below:

· Wastewater System Point Repairs Project· Wastewater System Pipe Lining Project· Wastewater System Manhole Rehabilitation Project

Conclusion

In conclusion, Master Pump Station No. 1 has a peak flow rate of 7.7 MGD and a pumping capacity of7.92 MGD; resulting in 0.22 MGD of additional capacity during a peak flow scenario.

References

1. Bentley SewerGEMS (Version V8i Select Series 5 (8.11.05.58). (2015). Watertown CT.

2. Boyle Engineering, Inc. City of St. Petersburg LS#61/Pasadena Master Technical Memorandum.Tampa, FL, September 2006.

3. Kimley-Horn and Associates, Inc. City of St. Pete Beach Model Capacity Report. Tampa, FL,September 2016.

4. Kimley-Horn and Associates, Inc. Pump Station #1 South Wetwell Pump ReplacementPreliminary Design Report. Tampa, FL, August 2013.

APPENDICES

APPENDIX A:Model Results

Scenario: Proposed All Pumps On

2 .63MG

D

(N/A

)M

GD

2.00

MG

D

0.00 MGD

1.20M

GD

0.72M

GD

18.8

5M

GD

2.64

MG

D

(N/A

)MGD 2 .3

4 MGD

2.00

MGD

Page 1 of 127 Siemon Company Drive Suite 200 WWatertown, CT 06795 USA +1-203-755-1666

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Bentley SewerCAD V8i (SELECTseries 5)[08.11.05.58]

Bentley Systems, Inc. Haestad Methods SolutionCenterPressure Model-Formatted.stsw


P-15

P-13

P-9

P-7

P-6

P-1

P-3

7

P-38

2.63

MG

D2.63 MGD

(N/A

) MG

D

7.92

MG

D

5.29M

GD

2.65

MG

D

2.65

MG

D

2.65

MG

D


1/18/2017


Bentley Systems, Inc. Haestad Methods SolutionCenterPressure Model-Formatted-Ind.stsw


P-47

P-44P

-8

P- 29

2.00

MG

D

0.00 MGD

7.92

MG

D

0. 72M

GD


1/18/2017




P-20

P-19

P-18

(N/A) MGD

(N/A

) MG

D

2.34 MGD


1/18/2017




P-47

P-44

P-46

P-482.

00M

GD

0.00 MGD

1. 20M

GD

2.00 MGD


1/18/2017




P-43

18.86 MGD


1/18/2017




P-51

P-5

3

18.86MGD

18.8

6M

GD


1/18/2017



FlexTable: Pressure Junction TableHydraulic

Grade(ft)

Pressure(psi)

Elevation(ft)

Elevation(Ground)

(ft)

Label

135.3458.11.005.00J-1133.8957.51.005.00J-4130.1356.7-1.000.00J-553.0922.51.005.00J-7

134.2657.71.005.00J-9115.2249.02.004.50J-10

92.5439.61.005.00J-11 - TIMP #4

88.1737.71.005.00J-12137.6359.50.000.00J-14137.6559.60.000.00J-1511.453.73.006.00J-1911.45-2.517.1220.12J-2125.569.83.006.00J-2211.55-2.417.1220.12J-2329.3911.43.006.00J-2413.251.410.0013.00J-2541.458.521.7024.70J-2661.1318.917.3820.13J-28

27 Siemon Company Drive Suite 200 W Watertown, CT06795 USA +1-203-755-1666

1/15/2017

Bentley SewerCAD V8i (SELECTseries 5)Bentley Systems, Inc. Haestad Methods Solution CenterPressure Model-Formatted.stsw

FlexTable: Pressure Pipe TableHazen-Williams CHeadloss

(ft)Velocity(ft/s)

Flow(MGD)

Minor LossCoefficient(Unified)

Diameter(in)

Length(ft)

Invert(Stop)

(ft)

Invert(Start)

(ft)

Label

120.00.0111.732.650.0008.00.1-9.00-9.00P-1120.01.445.865.292.10016.040.01.001.00P-6120.03.776.947.923.50018.0120.0-1.001.00P-7120.077.046.947.920.00018.08,030.01.00-1.00P-8120.0(N/A)(N/A)(N/A)0.00012.00.1-11.00-11.00P-9120.00.005.182.630.00012.00.1-11.00-11.00P-10120.00.372.922.632.10016.040.01.001.00P-13120.0(N/A)(N/A)(N/A)4.80012.040.01.00-11.00P-14120.02.365.182.634.80012.040.01.00-11.00P-15120.00.002.592.340.00016.00.1-10.00-10.00P-16120.00.002.592.340.00016.00.1-10.00-10.00P-17120.00.002.592.340.00016.00.1-10.00-10.00P-18120.0(N/A)(N/A)(N/A)0.00016.00.1-10.00-10.00P-19120.0(N/A)(N/A)(N/A)4.80014.040.02.00-10.00P-20120.00.993.392.344.80014.040.02.00-10.00P-22120.00.993.392.344.80014.040.02.00-10.00P-23120.00.993.392.344.80014.040.02.00-10.00P-24120.027.056.147.020.00018.03,530.01.002.00P-25120.035.086.777.740.00018.03,820.01.001.00P-26120.04.373.190.720.0008.0745.01.001.00P-29120.00.0111.732.650.0008.00.1-9.00-9.00P-34120.02.125.212.654.80012.010.60.00-9.00P-35120.02.295.212.654.80012.029.41.000.00P-36120.02.105.212.654.80012.08.60.00-9.00P-37120.02.315.212.654.80012.031.41.000.00P-38120.041.647.7115.660.00024.04,990.017.121.00P-42120.00.539.2918.860.00024.045.217.3717.12P-43120.00.000.000.000.00014.03,565.03.0017.12P-44120.017.843.401.200.00010.03,500.017.123.00P-46120.012.323.942.000.00012.02,280.010.003.00P-47120.01.691.752.000.00018.02,260.017.1210.00P-48120.00.112.803.200.00018.060.017.1217.12P-49120.00.034.1318.860.00036.020.033.8621.70P-51120.00.085.9418.860.00030.020.017.3817.37P-52120.019.674.1318.860.00036.012,040.021.7017.38P-53

Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT06795 USA +1-203-755-1666

1/15/2017

Bentley SewerCAD V8i (SELECTseries 5)[08.11.05.58]Bentley Systems, Inc. Haestad Methods Solution CenterPressure Model-Formatted.stsw

FlexTable: Pump TableFlow (Pump)

(MGD)Hydraulic Grade(Downstream)

(ft)

Head (Pump)(ft)

Pump DefinitionElevation (Invert)(ft)

Label

2.65139.75144.96St. Pete Beach Pump-9.00SP-12.65139.75144.96St. Pete Beach Pump-9.00SP-2

(N/A)(N/A)(N/A)St. Pete Beach Pump-11.00NP-12.63136.62145.12St. Pete Beach Pump-11.00NP-2

(N/A)(N/A)(N/A)Treasure Island Pumps-10.00TIP-12.34116.21126.11Treasure Island Pumps-10.00TIP-22.34116.21126.11Treasure Island Pumps-10.00TIP-42.34116.21126.11Treasure Island Pumps-10.00TIP-3

18.8661.2150.29LS#61 Pump17.37LS-61

Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT06795 USA +1-203-755-1666

1/15/2017

Bentley SewerCAD V8i (SELECTseries 5)[08.11.05.58]Bentley Systems, Inc. Haestad Methods Solution CenterPressure Model-Formatted.stsw

FlexTable: Outfall TableFlow (Total

Out)(MGD)

Elevation(User

DefinedTailwater)

(ft)

BoundaryCondition

Type

Elevation(Invert)

(ft)

Elevation(Rim)(ft)

Elevation(Ground)

(ft)

Label

18.8641.42User DefinedTailwater33.8643.7043.70NWRF

HEADWORKS


1/15/2017


FlexTable: Wet Well TableFlow (Total

Out)(MGD)

Elevation (Initial)(ft)

Label

5.29-5.20South Wetwell2.63-8.50North Wetwell7.02-9.90W-TI Master


1/15/2017


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City of St. Pete Beach Model Capacity Report Addendum · Bentley SewerGEMS (Bentley SewerGEMS ... City of St. Pete Beach Model Capacity Report Addendum ... Bentley SewerGEMS (Version