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).
Remotely Designed: Lessons Learned Designing during a Pandemic
Oskar Agustsson1, Kip Summers2
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:
Data gathering up front such as 360-degree photographs were taken and linked on a site plan at the beginning of the project which allowed for the design team to go on “virtual plant walks” to orient themselves.
As Built Verification relied on plant staff, that was already on site to operate the plant.
Light Detection and Ranging (LiDAR) scanning eliminated the need for continual visits to the plant for field measurements.
Building Information Modeling (BIM) used in conjuncture with LiDAR minimized known conflicts with field conditions.
Succinct presentation materials to ensure clear sharing of project details and decision making.
Polling features on virtual platforms was useful during meetings and helped project stakeholders make key decisions by guiding the conversation about what the Owner stakeholders agreed on and what needed further discussion.
Documentation with traditional meeting minutes, decision logs, comment logs.
Virtual pre-bid meetings and walkthroughs scheduled separately for each contractor.
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
Zach Dobroth1, Clint Dolsby2, Dave Bergdolt1, Dan Berthe2, Rick Kelly1, Travis Kissire2, Rick Murray2
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:
Slow: Transfer waste activated sludge (WAS) from the existing aeration basins to the new aeration basins over a period of days or weeks, operating both sides temporarily until the new basins are fully commissioned.
Intermediate: Transfer half of the mixed liquor from the existing basins directly to the new basins, operating both sides temporarily. After the new basins are stable, complete the transfer.
Quick: Transfer all of the mixed liquor from the existing basins directly to the new basins in one day.
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.