Weiland, John

John Weiland, PE is a Senior Project Manager and water resources engineer with Wade Trim, Inc. John has over 25 years of experience in designing collection system improvements to rehabilitate aging infrastructure, address capacity limitations and manage wet weather overflows. His work includes projects for major sewer districts throughout the Midwest. John is Past-President of the American Society of Civil Engineers – St. Louis Section, President of the Engineers’ Club of St. Louis, Member Services Executive Committee representative for the Environmental and Water Resources Institute (EWRI) of ASCE and is an active member of WEF and the Missouri and Nebraska Water Environment Associations. He has a BS and MS in Civil Engineering from the Missouri University of Science and Technology.

Titles from this speaker

Description: Planning, Design, and Construction of the Gravois Trunk Sanitary Storage Facility in...

Planning, Design, and Construction of the Gravois Trunk Sanitary Storage Facility in St. Louis, Missouri

Abstract

INTRODUCTION The Metropolitan St. Louis Sewer District (MSD) is undertaking a long-term program called 'MSD Project Clear' to improve water quality for the St. Louis region by reducing the occurrence of basement backups and overflows caused by excessive wet weather sanitary and combined sewage flows. One of the approaches MSD is taking to meet this goal is constructing new infrastructure to increase the capacity of their existing sewer collection system, including new relief sewers, wet weather storage facilities, and tunnels to store and transport wet weather sanitary and combined sewer flows. This presentation will describe how wet weather storage technology was applied to attenuate excess flows and eliminate wet weather sanitary sewer overflows (SSOs) and backups in a portion of MSD's collection system. This approach has been used elsewhere in MSD's system and has potential application to other similar wastewater systems through the United States. PROJECT BACKGROUND In 2014, MSD, in association with engineering consultants Burns & McDonnell Engineering Company, Inc. and Wade Trim, Inc. began planning the Gravois Trunk Sanitary Storage Facility in Crestwood, Missouri. This facility is located along the 54-inch diameter Gravois Trunk Sewer, within the Gravois Creek watershed and the sanitary sewer service area of MSD's Lemay Wastewater Treatment Facility. Multiple sites were reviewed for location of the storage tank(s) based on a series of criteria, including operational flexibility, land needed and availability, location within the watershed and ability to meet hydraulic and flow reduction requirements, maintainability, reliability, operability, constructability, and environmental considerations. All sites evaluated were required to accommodate the preliminary storage requirement of 9.25 million gallons (MG). The site of an existing City of Crestwood public works maintenance facility was selected, which is located on Pardee Lane adjacent to the Gravois Trunk Sewer and Gravois Creek. HYDRAULIC MODELING Hydraulic modeling evaluations were performed to assess the capability of the facility to achieve two (2) goals: 1) the removal of two (2) Constructed Sanitary Sewer Overflow (SSO) Outfalls; and 2) limiting the hydraulic grade line (HGL) within the Gravois Trunk Sewer to a minimum of 8 feet below grade for a 10-year return period, except in areas where the sewer is less than 8 feet deep or in areas where basements will not be impacted. Meeting these goals will provide a 10-year Level of Service (LOS) for the Gravois Trunk Sewer. A calibrated XPSWMM model of the Gravois Creek watershed was used to verify that the required 10-year LOS is being provided for three different conditions, including for the 10-year 24-hour synoptic and 10-year 3-hour cloudburst design storms, as well as for a continuous simulation using 64 years of historical rainfall data to evaluate the long-term performance using real rainfall events. The 3-hour cloudburst event represents a high-intensity lower volume rainfall event, in comparison to the lower intensity, higher volume 24-hour synoptic rainfall event. The required storage volume to provide the 10-year LOS was determined using two methods: 1) Log Person method to determine probability of recurrence of exceeding required volume, and 2) meeting HGL limitation criteria for the downstream trunk sewer. The model was also run for the full rainfall data for the years 2000 and 2008 ('Typical' and 'Wettest' years, respectively) to evaluate the expected frequency that the storage facility would be in operation. Final design sizing concluded that the following minimum storage volumes would be required to provide a 10-year LOS: Synoptic: 7.97-MG; Cloudburst: 4-MG, and Continuous Simulations: 7.85-MG. Based on these results, a total storage volume of 8.0-MG was used for design. Modeling efforts also included development of a HEC RAS model to evaluate hydraulic conditions in the sewer downstream of the diversion structure for the purpose of optimally locating level measurement instrumentation to be used in process control of the facility. DESIGN CONFIGURATION Due to the site configuration, two (2) sanitary storage tanks with a storage volume of 4.0-MG each were planned rather than a single 8-0-MG storage tank. Above-ground storage tanks were designed using the AWWA D-110 Type III standard for Wire- and Strand-Wound, Circular, Prestressed Concrete Water Tanks. Tanks are 150-feet in interior diameter, with a maximum height above ground of 45-feet, in compliance with local ordinance. Tank floors are sloped to the center at a depth of approximately 8 feet below grade, and drained by gravity back to the trunk sewer. An aesthetics committee comprised of representatives of MSD, the design team, and public stakeholders was convened during design for the purpose of soliciting feedback on such features as tank faÃ§ade, landscaping, and fencing. Other facility features included: - Non-staffed and fully automated - Diversion structure - Consolidation sewers - 54-MGD influent submersible pumping station - Granular activated carbon odor control system - Vertical turbine pumping system and rainwater harvesting system - Tank and wet well cleaning systems - Gravity dewatering sewers and control valves - Site paving, lighting, and landscaping including stormwater BMPs - Instrumentation and controls - SCADA system for centralized remote control - Control Building - Electrical Primary and Secondary Power - Miscellaneous Improvements POST-DESIGN ASSESSMENT Design was completed in 2018, and a construction contract in the amount of approximately $24 Million was awarded, after competitive bidding with four responsive bids received, to Plocher Construction Co. Inc. of Highland, Illinois. Construction began in 2019 and was completed in 2021. The Gravois Trunk Sanitary Storage Facility has been in successful operation by MSD since January 2021. CONCLUSIONS - AWWA D-110 tanks provide cost-effective above-ground storage - Above-ground wet weather sanitary storage requires extensive public outreach - Hydraulic analysis needs to consider future pipe lining, as well as potential for rapidly varied flow and/or backwater conditions in locations used for flow or level measurement - Need to build flexibility and operational feedback into facility design and process flow control strategies Refer to Picture 1 below for an aerial photo taken of the completed facility.

This paper was presented at the WEF Collection Systems Conference in Detroit, Michigan, April 19-22.

SpeakerWeiland, John

Presentation time

14:00:00

14:30:00

Session time

13:30:00

16:30:00

Session number12

Session locationHuntington Place, Detroit, Michigan

TopicCapacity Assurance, SSO Reduction, Wet Weather

Author(s)

J. Weiland

Author(s)J. Weiland1; C. Kimmel2; S. Roberts3

Author affiliation(s)Camp Dresser & McKee Inc1; Burns & McDonnell2; Metropolitan St. Louis Sewer District3

SourceProceedings of the Water Environment Federation

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Apr 2022

DOI10.2175/193864718825158340

Volume / Issue

Content sourceCollection Systems

Word count16

Saddle Creek RTB - From Concept to Reality

Abstract

INTRODUCTION The Saddle Creek Retention Treatment Basin (RTB) is a significant project as part of the City of Omaha's water quality program 'Clean Solutions for Omaha' to address compliance with their Long Term Control Plan to address combined sewer overflows. Prior to the construction of the facility, over 65 times per year, untreated combined sewage overflowed into the Little Papillion Creek (LPC) from the City's CSO 205 outfall structure. With the new facility in place, combined sewage will be diverted to the RTB to receive grit and screenings removal, disinfection, solids settling, and dechlorination before being discharged back to LPC. The Saddle Creek RTB project began planning and design activities in April of 2011. Construction commenced in Spring 2019 and is anticipated to start operations in the summer of 2023. This facility will provide storage and equivalent to primary treatment of combined sewage flows up to the permitted design flow rate of 160 million gallons per day (MGD) with the ability to screen, remove grit, and disinfect flows up to 320 MGD. Lower volume flows will be captured within the basin and will be pumped into the Little Papillion Creek Interceptor (LPCI) and conveyed to the Papillion Creek Water Resource Reclamation Facility (PCWRRF) for full secondary treatment. Larger volume flows will receive grit and screenings removal, disinfection, solids settling, and dechlorination before being discharged to the LPC. The facility will result in a significant reduction in the volume of untreated CSO, total suspended solids (TSS), and E coli bacteria entering the LPC. This presentation will describe how the Saddle Creek RTB will effectively and reliably capture and treat untreated combined sewage in compliance with regulatory requirements. FACILITY OVERVIEW The Saddle Creek RTB facility consists of a 3.3 million gallon (MG) underground concrete storage basin, with grit removal, mechanical screening, chemical disinfection, gravity effluent discharge, a dewatering pump station, as well as Headworks, Operations, and Chemical Buildings. The facility also includes a diversion structure, sewers, odor control, stormwater BMPs, driveways, and other appurtenances. Refer to Figure 1 for a Process Flow Diagram illustrating the various features of the RTB facility below ground. The facility operates during wet weather events. Prior to the completion of the Saddle Creek RTB project, an existing dry weather diversion weir directed dry weather and a portion of wet weather flow, up to 40 million gallons per day (MGD), was sent to the existing Dupont Grit Facility and ultimately to the LPCI. Prior to this project, any excess flow was discharged untreated to the CSO 205 Channel and eventually the LPC. The existing dry weather diversion pipes will be abandoned as part of this project and replaced with a new 60-inch sewer which will pass through a grit pit within the new facility's Headworks Building. The diversion weir will send flows using real time control and smart sewer technology to provide gate control of up to approximately 60 MGD to the LPCI before overflowing into the RTB influent sewer. This new diversion chamber will divert wet weather flow up to the peak treatment design flow of 160 MGD to the RTB. This diversion chamber configuration ensures that flow rates up to the design flow can pass through the RTB and does not increase the risk of upstream flooding during larger events. Captured volume in the tank will be pumped into the LPCI and conveyed to the Papillion Creek Water Resource Recovery Facility (PCWRRF) for full secondary treatment. Flows more than the facility capacity will be routed around the RTB and discharged into the LPC. Dry weather flow and some wet weather flows up to approximately 60 MGD will pass into a new grit pit, the diversion flow grit pit, constructed in the proposed Headworks Building. For flows passing through the RTB, large grit and other heavy materials will drop out via gravity into a second, larger grit pit, the RTB grit pit, prior to entering the screen channels. Downstream of the RTB grit pit, mechanically cleaned screens will provide for the removal of objectionable solids with the intent of protecting downstream equipment and controlling floatables. The facility includes three (3) continuous duty multi-rake screens with a clear opening size of ¾-inch. Disinfection must result in an effluent that meets E. coli and total residual chlorine (TRC) permit limits. Liquid sodium hypochlorite and sodium bisulfite will be used for disinfection and dechlorination. Above ground improvements include a building to house controls, grit and screening equipment, and chemicals. Refer to Figure 2 for a rendering of the finished facility. PROJECT COMPLETION STATUS In December 2018, the City received bids within the budget for the project and in February 2019, a contract valued at approximately $90 million was approved to build the Saddle Creek Retention Treatment Basin facility. Construction began in April 2019. Wade Trim performed design engineering on the project and is currently providing construction management services. The project is scheduled for Substantial Completion in Spring 2023. Refer to Figures 3 and 4 for construction progress photos. CONCLUSIONS The project's innovative use of a 'gravity in, gravity out' design for the RTB facility allowed for a reduction in pumping of significant flows. The use of real time controls and smart sewer technology will allow this facility to operate efficiently and effectively over a wide range of conditions, which have been evaluated through extensive hydraulic modeling and development of process control strategies. The use of instrumentation for flow and level measurement used in process control must incorporate redundancy and be flexible to allow for changes in available technology and must be compatible with other technologies being used at the facility and within the collection and treatment system.

This paper was presented at the WEF Collection Systems Conference, June 27-30, 2023.

SpeakerWeiland, John

Presentation time

16:15:00

16:45:00

Session time

13:30:00

16:45:00

SessionSession 03: Design & Construction

Session number03

Session locationKansas City Convention Center

TopicDesign & Construction, Wet Weather Management & Control (CSOs/SSOs)

Author(s)

Weiland, John

Author(s)J. Weiland1; D. White1; J. Hansen2; M. Zelensky2; M. Arends2;

Author affiliation(s)Wade Trim1; City of Omaha Public Works2;

SourceProceedings of the Water Environment Federation

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Jun 2023

DOI10.2175/193864718825158920

Volume / Issue

Content sourceCollections

Word count9

The Saddle Creek RTB: A Storage and Treatment Solution for CSO

Abstract

The City of Omaha Public Works Department is undertaking a major water quality improvement program called Clean Solutions for Omaha, or CSO! which will improve water quality in Omaha’s rivers and streams by capturing or treating 85% of the average annual combined sewage volume through a series of projects. One of the major projects as part of this program is the Saddle Creek Retention Treatment Basin. The purpose of the Saddle Creek Retention Treatment Basin (SCRTB) Project is to capture combined sewage and store or treat it during wet weather events. This paper describes how wet weather storage and treatment technology was applied to attenuate excessive flows for the purposes of meeting the Long-Term Control Plan requirements for control of combined sewer overflows.

SpeakerWeiland, John

Presentation time

09:00:00

09:20:00

Session time

08:30:00

10:00:00

SessionDesign and Construction Challenges for CSO Control Implementatioin

Session locationRoom S403a - Level 4

TopicCollection Systems, Intermediate Level, Wet Weather

Author(s)

Weiland, John