Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).
Location: Room 430AB |
|Date: Monday, 13/Sept/2021|
|10:30am - 12:00pm||Session 03A: Wastewater Process: Planning & Compliance - Livestream|
Location: Room 430AB
10:30am - 11:15am
What? When? How Sensitive? Evaluating Capacity At King County’s Three Regional Plants
1Brown and Caldwell, United States of America; 2King County Wastewater Treatment Division, United States of America;
To protect public health and deliver reliable clean water services while accounting for changes in the service area, King County Wastewater Treatment Division (WTD) updates its projections of wastewater flows and loads every 10 years and evaluates their impact on overall treatment plant capacity. In 2014, WTD noted that influent loads were increasing more quickly than flows. Recent water conservation efforts have reduced the amount of potable water used on a per-capita basis. These reductions in water use directly impact wastewater flows, but not loads. As a result, influent concentrations are higher than the design values. Comparing the flow and load projections with the current rated capacities for each of the County’s three regional plants (South, West Point and Brightwater) shows that the rated flow capacities will be reached after 2035 whereas the rated loading capacities will be exceeded within the next 10 years.
To identify potential capacity limitations and their timing by process within the three plants, WTD undertook an in-depth capacity evaluation for all major processes. The evaluation accounts for plant-specific wastewater characteristics, existing regulatory requirements, operating configurations, and process performance. Sensitivity analyses were conducted for each plant to assess the influence of various critical parameters on unit process capacities. Some unit process capacities were found to be highly sensitive to changes in certain parameters. For example, at West Point, capacity of the aerators in the high-purity oxygen aeration basins could change significantly at different target dissolved oxygen concentrations. At both West Point and Brightwater, taking one digester out of service for maintenance was found to have significant impact on the timing of the digester capacity limitation. This analysis provided WTD with an understanding of the timing for when unit process capacity limitations may be experienced to inform system-wide treatment planning.
11:15am - 12:00pm
Dairy Cows Speak a Different Language: Jerome’s Journey to Wastewater Compliance
1Keller Associates, Inc., United States of America; 2City of Vancouver, Washington; , ,
Jerome's wastewater treatment plant is unique in that several dairy products processing facilities deliver most of the loading to the treatment plant. This dairy processing brought significant revenue to the City, at the cost of large fluctuations and high loading at the treatment plant. Seeking resolution to repeated discharge permit violations caused by the high loadings, the City and the Environmental Protection Agency entered a consent decree. The City of Jerome and Keller Associates worked quickly to assess the treatment system and evaluate compliance options for the best treatment of the high-strength wastewater. A phased approach to improvements allowed the City to promptly reduce additional non-compliance risks while further upgrades were designed and constructed.
Phased upgrades at the treatment plant were completed approximately a year ago. These upgrades incorporated approximately five years of construction and a total cost of about $35 million – the largest project in the City's history. This wastewater treatment project successfully reused/rehabilitated a significant portion of the existing plant and included the construction of 24 new treatment/conveyance structures. Plant compliance during construction was challenging as all unit processes were disrupted. This presentation will focus on the approach and results – during design, construction, and post-construction – that addressed Jerome's high-strength dairy wastewater and prepared them for sustained compliance.
|1:15pm - 2:45pm||Session 03B: Wastewater Process: Nutrient Removal - Livestream|
Location: Room 430AB
1:15pm - 2:00pm
How a Full-Scale Pilot Guided a WRRF Path to Chemical P Removal
1Stantec, United States of America; 2City of Englewood - South Platte Renew;
South Platte Renew (SPR) is the third largest water resource recovery facility (WRRF) in Colorado, with a capacity of 50 million Gallons per day (MGD). SPR’s discharge to the South Platte River is regulated by the Colorado Department of Public Health and Environment (CDPHE). CDPHE set a regulatory roadmap for nutrient removal with intermediate steps for compliance including a 10-year Voluntary Incentive Program (VIP). This program allows the SPR to voluntarily treat nitrogen and phosphorus to levels below permit requirements and to earn compliance credits (i.e., years) towards future more stringent regulations.
To take full advantage of the VIP, SPR is implementing a chemical phosphorus removal (Chem-P) process to achieve effluent total phosphorus below 0.7 mg/L. SPR took a comprehensive approach to evaluate design options for Chem-P implementation including full-scale piloting. The pilot used existing ferric sulfate storage/dosing facilities. The ferric sulfate dose was varied in three phases through five months: (I) initial baseline, (II) ramp-up, (III) stabilization at optimum dose. The pilot was conducted by a team of operators and engineers. Close collaboration and monitoring were critical for the successful completion of the pilot. Plant profiles of phosphorus, nitrogen, total suspended solids, alkalinity, and pH were monitored. Spot sludge samples were collected for vivianite analysis through x-ray diffraction.
The full-scale pilot demonstrated that a dose of 40 mg/L is required to reach the desired effluent total phosphorus concentration of 0.7 mg/L as P. It also indicated an increase in solids production of over 10 percent for the current 18 MGD average flow. Furthermore, the results indicated that depending on the overall plant operation, the impact in alkalinity may be significant to meeting effluent pH limits. Nitrification was not significantly affected during the full-scale pilot, however a small reduction in performance during high load hours of the day was observed.
Conversion to full biological phosphorus removal can be a costly option depending on the overall existing facility process design. Chem-P is still a common and cost-effective alternative to many WRRFs. This presentation will describe the approach and lessons learned in the full-scale chemical P removal pilot at the SPR WRRF.
2:00pm - 2:45pm
Pilot Testing Nuvoda’s Mobile Organic Biofilm at the Edmonds WWTP
1BHC Consultants; 2City of Edmonds, WA; 3Jacobs; 4Nuvoda; 5University of Washington; ,
Like many other WWTPs in the Puget Sound region, the Edmonds WWTP will be facing nitrogen limits under the Nutrient General Permit from the Washington State Department of Ecology. The City of Edmonds WWTP is a conventional activated sludge process originally designed for oxidation of BOD with a mean-cell residence time typically between 3 and 5 days. A large amount of additional tankage would be required to upgrade the conventional activated sludge process for nitrification and denitrification at considerable expense and would present major challenges in creating space for such an addition. Rather than wait until forced to face this challenge, the City has decided to proactively explore promising alternatives. One such alternative is Nuvoda’s MOB™ (Mobile Organic Biofilm) process. The City of Edmonds, Nuvoda, BHC Consultants, Jacobs, and the University of Washington worked together to first assess the feasibility and potential effectiveness of this technology, followed by conducting a full-scale pilot test. Topics of this presentation will include:
|3:00pm - 5:15pm||Session 03C: Wastewater Process: Biological Intensification - Livestream|
Location: Room 430AB
3:00pm - 3:45pm
CFD Modeling Provides Insights into Granular Sludge Separation Devices
1Carollo Engineers, United States of America; 2NEWhub; 3HRSD; 4UOSA; 5DC Water;
Granular activated sludge (GAS) consist of dense particles with stratified microbial colonies that provide efficient organics, nitrogen and phosphorus removal along with improving liquids/solids separation in activated sludge systems. GAS has gained broad interest and traction in recent years A growing number of water resource recovery facilities (WRRFs) in the U.S. and abroad have implemented inDense, a technology that uses hydrocyclones to select for GAS by separating it from lighter mixed liquor flocs. While hydrocyclones are an established approach to classify and separate particles in many fields, their application to GAS leaves key questions yet to be answered. Hydrocyclones have been designed, tested, and operated primarily based on empirical field performance data. To date, no group has successfully modeled GAS separation in AS systems by hydrocyclones despite the broad benefits this would bring to many WRRFs, until now. A team comprised of technical experts from equipment inventor, VA and DC utilities, and a consulting team collaborated on this effort to combine inDense installation and performance data from current full-scale inDense U.S. installations, state-of-the-industry understanding of GAS and inDense systems, and state-of-the-art CFD modeling capabilities. Project findings will be presented, illustrating that CFD modeling developed in this project simulating hydrocyclone GAS separation is a useful tool to inform the design and operation of external selector systems. This will lead to clear visualization of internal separation process, expanding our understating of how to adjust operations to different process and seasonal conditions.
3:45pm - 4:30pm
Experience With Densified Mixed Liquor And Nutrient Removal At Two WWTFs In Washington
RH2 Engineering, Inc, United States of America; ,
The Cashmere and Peshastin WWTFs discharge to the Wenatchee River, which has a TMDL for phosphorus. The Cashmere WWTF was the subject of the article “Cashmere Quality – Experience with enhanced biological phosphorus removal, surface wasting, and aerobic granular sludge” which appeared in the July 2020 edition of the Water Environment and Technology magazine. This presentation will expand upon that article and share recent findings related to the densified mixed liquor and biological nutrient removal at both WWTFs.
The Cashmere WWTF is a plug flow modified Bardenpho process and the Peshastin WWTF is a sequencing batch reactor. The two WWTFs have significantly different influent characteristics. Cashmere has a moderate strength influent due to a large apple slicing facility that discharges to the City’s system. Peshastin has relatively weak wastewater as the community is served by a septic tank effluent system, which removes settleable solids prior to discharge to the WWTF. Additionally, the Peshastin WWTF receives widely varying flows throughout the year from two fresh fruit packing warehouses that discharge significant quantities of rinse water to the system.
Each WWTF is configured to favor biomass with good settling characteristics. Both plants exhibit significant fractions of aerobic granules as part of the biomass and each process achieves exceptional settling at relatively high mixed liquor concentrations. For instance, the Cashmere WWTF routinely has mixed liquor suspend solids concentrations in excess of 6,000 mg/L with SVIs below 50, in conjunction with a clarifier blanket below 2 feet.
The capacity of a WWTF is generally proportional to the mass of mixed liquor suspended solids that can be carried within the system. The settleability of these solids is a critical parameter as it can significantly affect the footprint necessary to support the process. Implementing bacterial selection processes through WWTF design and process controls can change the structure and function of the microbial communities to provide a densified mixed liquor, as can be found at the Cashmere and Peshastin WWTFs. Insights into these two WWTFs may be useful to other plants needing to increase treatment capacity relative to plant footprint while achieving biological nutrient removal.
4:30pm - 5:15pm
Advanced Aeration Control with Densification Achieves BNR Intensification: A Full-scale Demonstration of the Ntensify Process
Brown and Caldwell, United States of America;
Driven by stringent new nutrient standards and increasing costs of nutrient removal, utilities in the Pacific Northwest must look towards innovative approaches to solve the issue. Advanced aeration controls like ammonia vs NOx (AvN) or ammonia-based aeration control, lower the aeration energy while promoting a more carbon-efficient nitrogen removal via simultaneous nitrification and denitrification (SND). Low dissolved oxygen (DO) maintained by advanced aeration control is the key to aeration savings and SND but often leads to poor settling sludge. The Ntensify approach combines low DO operation with hydrocyclone based wasting to achieve continuous flow aerobic granulation and enhanced nutrient removal. This presentation will describe the results from the full-scale Ntensify installation at the James R. Dolorio Water Reclamation Facility (JRD WRF) in Pueblo, Colorado.
The JRD WRF is a 19 mgd biological nutrient removal (BNR) facility that operates a Johannesburg process. The recently upgraded facility includes hydrocyclones that feed a portion of the RAS to target lighter organism waste in the mixed liquor. Upgrades implemented AvN control, allowing DO setpoints to fluctuate between 0.2 – 2 mg/L while maintaining equal effluent ammonia and NOx concentrations.
Improvement results showed that hydrocyclone-based wasting helped improve settling characteristics [sludge volume index (SVI) < 100 mL/g values ranging from 130 to 300 mL/g before implementation] within weeks of operation. Phosphorus accumulating organisms (PAO) and nitrifiers are preferentially retained in dense flocs and granules, while lighter heterotrophic and filament-type organisms are preferentially wasted. The hybrid floc-granules combination at Pueblo achieved excellent effluent turbidity (effluent TSS < 6 mg/L, turbidity < 2 NTU). AvN control resulted in low DO conditions (< 0.4 mg/L) that reduced air demands by 50% while supporting excellent nitrogen [effluent total inorganic nitrogen < 11 mg/L] and total phosphorus (TP) removal (effluent TP < 1 mg/L)] at low influent carbon conditions (primary effluent COD/N <6) without supplemental chemicals.
|Date: Tuesday, 14/Sept/2021|
|8:00am - 9:30am||Session 09A: Resource Recovery - Livestream|
Location: Room 430AB
8:00am - 8:45am
Thermal Energy from Wastewater – A New Role of Wastewater Utilities in the New Energy Economy
Tetra Tech, United States of America;
The Pacific Northwest has become a key area of North America in the application of thermal enegy from wastewater (TEW) for indoor heating. The combination of GHG goals and buidling code requirements has motivated high-density development to look at its options for geo-exchange type heat pump applications for meeting heating needs but with out main reliance on fossil natural gas. Because of its subteranean proximty to high density development in urban landscapes TEW is increasingly becoming yet another resource to be extracted from wastewater. And hence, a new role is emerging for wastewater utilities to contibute towards a circular economy. In temperate and cold climates most of the residential energy requirement is for indoor heating and hot water.
Tapping into TEW for campus and district scale heating in the built envrionment can can be particularly attractive due to the proximity of interceptor sewers in areas where high-density development tends to occur and the fact that by its nature, wastewater is warm. Traditional ground-source heat pump systems are challenging due to the lack of land area for horizontal systems and the challenges of drilling deep systems in urban settings. While much attention is already given to energy recovery from biogas at Water Resource Recovery Facilities (WRRFs) it is only recently that more attention is being given to TEW. The energy recovery potential from TEW is several times greater than the amount of energy that can be recovered through biogas. In the full submission, the author will provide the audience with knowledge transfer based on case study examples of the technical, financial, and partnership opportunities and challenges that need to be addressed in order to bring a TEW campus or district scale system from concept to reality.
The full presentation will provide an overview of the technical as well as the partnership components that must come together in order to deliver a campus scale TEW system.
8:45am - 9:30am
Truly Sustainable Biosolids Management For a Waste Free Future
Bioforcetech Corporation, United States of America;
Since its founding in 2013, Bioforcetech has been working to prevent carbon emissions from the wastewater treatment process, and create a valuable product from its solid ‘waste.’ In 2018, 18% of the emissions generated in the United States came from organics breaking down in landfills. While this number alone is overwhelming, it doesn’t even begin to capture the total emissions released during the processes of drying and transporting solids from wastewater treatment.
Our proprietary two step process of drying and pyrolyzing biosolids utilizes our patented Bioforcetech BioDryer and P-Series Pyrolysis machines. These two technologies work together to reduce material volume and weight by 90%, lock available carbon in place for centuries, and produce a clean, valuable biochar at net-zero energy.
The biochar produced from our process is called OurCarbon™, and we’re using this material to develop sustainable replacements for petroleum based materials and to close the loop on waste streams both in the municipalities where our plants are installed and in products that are sold across the country. The Parks Department in the community where our California installation is located has begun incorporating our biochar into their local parks and plantings. Our first suite of products, called Den™, is a set of soil mixes showcasing our biochar as its main ingredient formally called OurCarbon™. Other empirical testing in pigmentation, fabric dyes, paint colorants, and material additives to concrete show promising opportunities to expand the use of biochar into these markets. The promise of this investigation allows us to offer a no-cost biochar off-take agreement to municipal clients with a profit share back to our client for any biochar sales made in profitable applications. At no cost guaranteed, our off take agreement ensures that excess biochar will never be a future issue for our clients.
|10:30am - 12:00pm||Session 09B: Climate Science & Stormwater - Livestream|
Location: Room 430AB
10:30am - 11:15am
Pinpointing and Prioritizing I&I Impact with Climate Change
1SmartCover Systems, United States of America; 2South Suburban Sanitary District, OR; ,
The Klamath Falls South Suburban Sanitary District encompasses roughly 10 square miles and serves a population of approximately 25,000 people in Klamath Falls, Oregon. SSSD owns and maintains over 100 miles of sewer pipe and over 1000 manholes. Most of the sewer mains were installed in the 1960’s and 1970’s.
One of the key focus areas for SSSD is the management of Inflow and Infiltration (I&). Excessive I&I can overwhelm a collection system’s capacity creating overflows. Climate change indicates more severe weather in the future. These changing weather patterns and frequency of severe weather is more and more relevant to sewer operators. I&I increases wastewater treatment plant flows unnecessarily increasing treatment plant processing costs.
SSSD started monitoring in 2012 by installing four initial monitoring units for a cost of $50,000 but, when the need arose for expanding our efforts to more locations, they required a more flexible, easy-to-install and cost-effective solution.
To address I&I monitoring expansion plans, SSSD designed a smart sewer system with SmartCover technology.
By leveraging SmartCover patented design and deployment, SSSD has been able to both expand I&I monitoring and enhance the granularity and detail of information compiled. SmartCover flexibility has proven to improve existing I&I monitoring processes at a much lower cost than the alternatives. Deployment is turnkey because no confined entry is required, allowing a collection system to get up and running fast without a lot of wasted staff time or traffic management.
SmartCover customized the solution to aggregate flow information from multiple locations, thereby enabling more flexibility to analyze relationships between sites and to better understand the dynamics within sub-basins.
It is anticipated that ROI on the first round of SmartCover deployment will yield better information on I&I and provide a more refined capital improvement decision making process, while also controlling costs and enhancing usage of valuable staff and resources.
11:15am - 12:00pm
And the Rains Came: Characterizing Rainfall for Climate Impacts
1Brown and Caldwell, United States of America; 2City of Shoreline, Washington, United States of America;
Prolonged wet weather and extreme storms can overwhelm drainage systems, cause urban flooding, or potentially lead to uncontrolled discharges of contaminated waters. While we understand these as potential impacts, quantitative risk-based analyses can be challenging given the natural variability of rainfall and the uncertainty associated with changing climate conditions. As the City of Shoreline (Washington) plans for a resilient future, the Surface Water Utility has recently compiled and analyzed precipitation data to create a library of rainfall time series and design storm events for use in stormwater planning and design studies. These data include observed storm events, updated intensity-duration frequency curves, and synthetic design storms—based on both historical conditions and adjusted for future climate conditions. This presentation will not only describe the development of these data, but also discuss appropriate use, uncertainty ranges, and how results should be interpreted for stormwater management decisions.
|1:15pm - 2:45pm||Session 16A: Facility Operations & Lessons Learned - Livestream|
Location: Room 430AB
1:15pm - 2:00pm
Remotely Designed: Lessons Learned Designing during a Pandemic
1HDR; 2LOTT Clean Water Alliance;
This presentation will share lessons learned from the design of a complex WWTP upgrade project performed during the COVID-19 pandemic, forcing all parties to work remotely. It showed the importance of existing project management tools and the development of additional tools. In March of 2020, HDR was contracted to design and install new turbo blowers at the LOTT Clean Water Alliance Martin Way Reclaimed Water Plant. Due to stay-at-home” orders our team quickly pivoted to advancing the project with the use of remote tools to facilitate collaboration and communication among consultant team members as well as LOTT staff. Clear meeting topics and agendas are always key to project management and even more so with remote or virtual connections. The presentation will include a discussion of the following elements which contributed to this project’s success:
The project is currently under construction and is scheduled to be completed by June, 2021.
2:00pm - 2:45pm
Lessons from the Startup of Meridian WRRF’s New Primary and Secondary Treatment Systems
1Brown and Caldwell; 2City of Meridian, Idaho; ,
To meet stringent effluent ammonia and phosphorus requirements, the City of Meridian recently expanded its Wastewater Resource Recovery Facility (WRRF) capacity to 15 mgd (maximum month flow) with the addition of an influent pump station, a headworks facility, two primary clarifiers, four aeration basins, two secondary clarifiers, a return activated sludge (RAS) classifying selector/anoxic basin, and sludge pumping stations. With the new facilities in place, the City planned to shut down the existing primary and secondary treatment trains until the trains could be retrofitted to meet the more stringent effluent limits. To commission the new facilities and quickly shut down the existing facilities, the City needed to plan for a complex transfer procedure of the existing mixed liquor into the new aeration basins. Our team envisioned three options:
The City selected a quick transfer as the preferred method and extensive planning began. Beginning over a year in advance, the City, engineer, contractor, and systems integrator held a series of meetings to identify critical connections and key tasks to be completed before, during, and after the transfer. This presentation will discuss the successes, challenges, and lessons learned from the planning and startup of the new systems at the WRRF. It will also include WRRF performance data from startup and from a year into operation.
|3:00pm - 4:30pm||Session 16B: Collection & Conveyance - Intelligent Collection Management - Livestream|
Location: Room 430AB
3:00pm - 3:45pm
Artificial Intelligence, Real Solutions. Identifying Sewer Defects with AI
Burgess & Niple; ,
Traditional sewer inspection methods such as internal CCTV can be time-consuming and can overlook defects due to inaccurate identification and subjectivity in how people code. When assessing the future degradation of a sewer line or determining which asset to prioritize for rehabilitation, the difference and accuracy of coding is critical.
The goal of integrating artificial intelligence (AI) with sewer inspection is to supplement workers in the field, not to replace them. AI takes on the more common defects allowing field workers to focus on work at hand (access, MOT, cleaning) and codes that are more difficult and less frequent.
As with any project, the more accurate the data that goes in, the better quality of data that comes out. It is necessary to capture clear and unobstructed video, whether a field technician or an AI-based platform performs the assessment. When provided clear video, B&N’s AI has an accuracy rating of approximately 90%.
Our AI captures and recreates the workflow in coding and performing the quality assurance/quality control (QA/QC) of sewer inspections. With this technology, we have substantially reduced the time required to review sewer inspection data, increased the number and accuracy of defects identified and coded, and supplemented the human element that is prone to bias. Removing the burden of coding all defects from the contractor allows them to inspect more footage in a day and reduce the cost-per-foot for the owner. Utility providers can quickly move through existing video to provide a database that shows the condition of their storm and sanitary infrastructure, allowing them to make data-driven decisions that are transparent and repeatable.
This presentation will demonstrate the benefits of using AI as a low-cost way to evaluate systems and better maintain assets to prioritize rehabilitation and coordinate with other work such as roadway improvements.
3:45pm - 4:30pm
Real Time – Decision Support Systems For Intelligent Watershed Management
Xylem Inc., United States of America;
Technological advances have enabled Real-Time Decision Support Systems (RT-DSS) to dynamically optimize collection system operations using a stream of data from sensors placed in the network, Supervisory Control and Data Acquisition (SCADA) systems, and real-time weather ensemble forecasts.
Giant leaps forward in computing power, combined with advances and cost reductions in sensor and telemetry technologies, have made it possible to go far beyond the status quo and break into a new echelon of opportunities. We can now run high-resolution models in real-time, with real-world precipitation data, while correcting critical downstream model nodes with observed sensor data. The outcome is perpetually calibrated digital copies of the urban watershed designed for operators providing far more effective real-time operational decision making and control.
The RT-DSS provides operational intelligence, including:
The RT-DSS output is actionable information provided to the operation staff, engineering, and leadership using web-based dashboards.
Attendees of this presentation will benefit by better understanding what a Real-Time Decision Support System (RT-DSS) is and how they can help utilities better manage their collection systems. This presentation will discuss the development and implementation of several RT-DSS for utilities here in the Pacific Northwest and across the Country.
|Date: Wednesday, 15/Sept/2021|
|8:00am - 10:15am||Session 23A: Construction & Alternate Delivery: Collaboration & Communications - Livestream|
Location: Room 430AB
8:00am - 8:45am
Building Resilient Communities Through Building Resilient Teams
1City of Boise; 2Jacobs; 3Brown and Caldwell; 4McAlvain Companies, Inc.; , , ,
Four years ago, the Lander Street Water Renewal Facility Phase 1 Improvements project team set out to create a resilient team that could deliver the City of Boise’s largest construction project in recent history. The project was well under way replacing deteriorating infrastructure when the global pandemic hit. This presented many different challenges which have changed the way we all work. Throughout this experience, our patience has been tested, relationships strained, and processes challenged, but the work put into developing the team paid dividends throughout those difficulties.
The City selected the Construction Manager/General Contractor (CM/GC) delivery model for this project and elected to bring the CM/GC into the project at the start of the engineering effort. This allowed for early team chartering and branding to prevent tripartite silos from forming. The project team quickly adapted the mindset of “we are protectors of infrastructure and of the Boise River.”
One of the key attributes of the project team’s approach is their willingness to challenge the status quo and modify a process if it is not working as intended. An example of this is the design coordination log (the process formerly known as requests for information). This use of this log has resulted in issuing early engineering clarifications that have outpaced subcontractor questions and allowed work in the field to progress without delays.
The project team has also enhanced communication by using multiple, real-time methods between engineering and field staff while leveraging asynchronous communication to manage the project narrative with stakeholders. The result has been optimized teamwork and collaboration, better informed management, increased communication with subcontractors, and decreased risk of miscommunication.
The project to date has not lost any schedule (even considering COVID) and has a deductive change order value while being almost halfway complete. This is attributed to the strong relationships that have formed and the resilient team approach that has been taken. The lessons that have been learned are being applied to the next phase of improvements in an effort to continue to overcome difficult situations and create our future.
8:45am - 9:30am
Pumping Up Communication Through Progressive Design Build
1Kennedy Jenks Consultants; 2City of Bend; ,
The City of Bend’s North Interceptor Sewer Project (NISP), identified in the Collection System Master Plan (CSMP), consists of design and construction of a sewer transmission system to accommodate the City’s growth plans, policies, and incorporate redundancy into the system. Along with serving an expanding UGB, the proposed alignment also allows for the decommissioning of up to ten (10) lift stations as an added benefit.
At the confluence of the existing Plant Interceptor and the newly planned NISP, a critical deficiency in hydraulic capacity for future growth was identified. It required the evaluation of alternatives for pipeline sizing, configuration, and routing, with an overall goal to set the City of Bend up for success long into the future. Through a collaborative decision-making process, our team leveraged a broad range of City stakeholders and arrived at a consensus to add an influent pump station at the Water Reclamation Facility (WRF). As a result, a significant challenge emerged with how to limit impacts on WRF operations during start-up and testing of the pump station.
This presentation will outline the vision and drivers for this project, along with sharing a success story on how utilities can use Progressive Design Build to deliver projects that mitigate impacts on operations. Attendees will learn about developing an integrated team, establishing the correct level of communication, and lessons learned that can be applied to future projects. Finally, the presentation will focus on creating a culture of change in project implementation that emphasizes integration of operations into the decision-making process. Pumping up Communication through Progressive Design Build resulted in a seamless transition from a gravity-fed treatment plant to one supplied by an influent lift station at the City of Bend’s WRF.
9:30am - 10:15am
Going Beyond Expectations: Collaborating to Deliver an Award-Winning Facility
1Carollo Engineers, United States of America; 2City of Oak Harbor;
The City of Oak Harbor (City) completed construction of its new $125 million Clean Water Facility (CWF) producing Class A reclaimed water quality effluent to the Puget Sound. Two overriding project goals for the City were protecting the environment and constructing a facility that was integrated into the community. With the greenfield CWF located downtown and adjacent to the waterfront Windjammer Park, the City incorporated architectural features and park amenities with the CWF project to become a civic asset woven into the community fabric.
Getting the project permitted and completed on schedule was a complex task due to site constraints, environmental restrictions, and the likelihood of encountering cultural resources. The City became one of Washington State’s first wastewater projects to be delivered under the alternative project delivery approach of a heavy-civil General Contractor/Construction Management (GC/CM). The GC/CM’s suggested approach shortened construction by 2 years from a conventional design-bid-build project by including:
Schedule related challenges were ultimately overcome by developing a genuine partnership with an eye to keeping quality expectations high. Implementation of these early design packages were successful and reinforced positive work relationships with the City, Engineer and GC/CM Contractor.
Presentation will include specifics on:
The efforts to bring the CWF to life have been recognized by the national American Public Works Association (APWA), American Council of Engineering Consultants (ACEC) and the Engineer-News Record (ENR) Best Projects for the Pacific Northwest region.
|10:30am - 12:00pm||Session 23B: Construction & Alternate Delivery - Livestream|
Location: Room 430AB
10:30am - 12:00pm
Outfall Fallout – Using the CM/GC Process for A WRF Outfall Replacement
1J-U-B ENGINEERS, Inc.; 2City of Post Falls, Idaho; 3McMillen Jacobs Associates; , , , ,
Have you considered involving a Construction Manager/General Contractor (CM/GC) for your next water resources project? The CM/GC contracting method is a fairly new mechanism available for use by Idaho municipalities compared to the traditional design-bid-build process. This approach can be useful and successful when project complexities necessitate the involvement of a contractor early in the project process.
This presentation will discuss the use of the CM/GC process by the City of Post Falls, Idaho (City) for replacement of their Water Reclamation Facility (WRF) outfall in the Spokane River. Representatives from the City (Owner), J-U-B Engineers, Inc. (J-U-B, Engineer of Record), and McMillen Jacobs Associates (McMillen, CM/GC) will provide a project history and discuss how various project risks evolved a traditional design-bid-build approach to a CM/GC process. The CM/GC procurement approach will then be discussed, followed by the various roles and responsibilities of the City, J-U-B, and McMillen during project design, environmental permitting, bidding, and construction. A panel discussion on lessons learned and future best practices with all three entities will follow the formal presentation.
The goal of this presentation is to discuss the City’s project-specific experience with the Idaho CM/GC process, including why they chose the CM/GC process over traditional design-bid-build and lessons learned for each phase of the process (procurement, design, construction), and then provide a forum for discussion with the City, J-U-B, and McMillen about each party’s general experience with the project and the CM/GC process. This presentation will provide insight for municipalities and engineers on why they might consider an alternate approach to design-bid-build and how they might successfully use the CM/GC process on their next project.
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