Plummer worked closely with the City of Amarillo to develop the 2012 Wastewater Master Plan (WWMP) that can be dynamically adjusted over time as new information becomes available. In addition to inspecting and renewing this aging existing infrastructure, the City needs to prepare for future growth and development with investments in new infrastructure.
A Project Kickoff and Strategic Goals Setting meeting helped Identify level of service goals, planning criteria, communication and scheduling goals, and benchmarks for the WWMP. The team integrated data from various sources to support the WWMP analyses and made recommendations for filling gaps in information where necessary. A regulatory strategy was developed to protect the City’s interests and the environment. The team conducted a comprehensive capacity, condition, and performance evaluation of the wastewater collection system. A hydraulic model of the existing collection system was constructed using the SewerGEMS software. Temporary flow and rainfall monitoring was conducted at key locations in the system to provide data to calibrate the model and conduct an overall I&I analysis of the system. The team also conducted and evaluated the capacity, condition, and performance of the City’s lift stations.
An infrastructure renewal plan was developed for the collection system pipelines using a risk assessment approach. Likelihood of Failure (LOF), Consequence of Failure (COF) and Risk of Failure (ROF) scores were developed of collection system assets as the basis to prioritize system renewal. A long term (50 year) sustainable renewal forecast projected the investment required to maintain system service levels.
A software tool was developed to help Utility Staff track, update, and append improvement projects proposed in the Wastewater Capital Improvement Program as new information becomes available The Dynamic Planning Tool supports Utility Staff beyond the duration of the WWMP contract with the decision-making tools to select and implement the right project at the right time. These tools better equip Utility Staff to keep their Capital Improvement Plan (CIP) current and up-to-date.