PSA - SB Dam 2024 DSSMR Compliance – Christopher B. Burke Engineering, LLC

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2024 South Bend Dam Technical Assistance November 21, 2023 Attachment A Page 1 Christopher B. Burke Engineering, LLC 220 West Colfax Avenue Suite 500 South Bend, IN 46601 574.282.8001 cbbel-in.com ATTACHMENT A The South Bend Dam (License No. 7569) is a low-head, run-of-the-river dam on the St. Joseph River near downtown South Bend. The Federal Energy Regulatory Commission (FERC) requires that a Dam Safety Surveillance and Monitoring Report (DSSMR) be completed annually to review instrumentation and monitoring data to determine if potential failure modes are developing. It is our understanding that the City of South Bend (City) would like Burke to complete the 2024 DSSMR (covering the 2024 calendar year) and other tasks related to ongoing FERC compliance in 2024. The scope of work will include the following tasks: Task 1 – 2024 Annual Inspection: In preparation for the 2024 DSSMR and to fulfill the annual visual inspection requirement, a Burke registered professional engineer will perform visual observations of safely- accessible portions of the dam and appurtenant structures. Since the South Bend Dam is an in-channel structure, much of the dam and its appurtenances are not readily accessible for visual observation. Burke’s observations will be focused on potential dam safety concerns to determine if the dam appears safe for continued operation. It is assumed that the annual inspection will occur on the same date as the gate operation certification. Task 2 – 2024 DSSMR Report: Burke will review pertinent information regarding the dam necessary to complete the DSSMR which may include previous DSSMR reports and other information contained in either the City’s or IDNR’s file for the dam as well as bathymetric survey or underwater inspection reports completed by the University of Notre Dame (license exemption holder) or its consultants. It is expected that the City will provide the data from the last year for the two staff gages located along the East Race. Burke will prepare a brief written DSSMR in accordance with FERC guidance outlined in Chapter 14 of Engineering Guidelines for the Evaluation of Hydropower Projects. The report will be completed based on Burke’s observations in 2024 as well as quarterly inspection and staff gage data provided by the City. The level of detail and content of the report is expected to be similar to previous DSSMRs prepared by Burke. We will submit the report to the City in draft format before finalizing. It is expected that the University of Notre Dame or its consultants will file the report with FERC and will also prepare the DSSMR covering the hydroelectric facility. The DSSMR report prepared by Burke will not include the hydroelectric facility. Task 3 – Update DSSMP: Burke will update the Dam Safety Surveillance and Monitoring Plan (DSSMP) for the South Bend Dam as needed based on comments received from FERC and changes that may have occurred since the last revision. We will submit the updated DSSMP to the City in draft format before finalizing. It is expected that the University of Notre Dame or its consultants will file the report with FERC concurrently with the 2024 DSSMR and will also update the DSSMP for the hydroelectric facility as required. The DSSMP updates prepared by Burke will not include the hydroelectric facility. Task 4 – Gate Operation Certification: The Spillway Gate Operation Certificate must be completed each year. Burke staff will observe operation of the three East Race gates by City staff and will assist in preparation of the certificate to submit to FERC. Burke will prepare a cover letter to accompany the certificate and will send it to the University of Notre Dame or its consultants for submittal to FERC.