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City Council Meeting Minutes March 2, 2021 <br />Against: 0 <br />19. Consider approval of Resolution 2021-49R, approving a Change in Service to the <br />agreement with Recreation Engineering and Planning, Inc. for additional design and <br />construction services for the Rio Vista Falls Maintenance Project in the estimated amount <br />of $74,000.00; authorizing the City Manager or his designee to execute the appropriate <br />documents to implement the Change in Service; and declaring an effective date. <br />A motion was made by Council Member Baker, seconded by Council Member <br />Gleason, to approve Resolution 2021-49R. <br />Greg Schwarz, Senior Engineer provided the presentation regarding the Rio <br />Vista Falls Maintenance Project. <br />Mr. Schwarz stated Rio Vista Falls has experienced consistent strong currents <br />and multiple flood events since 2006 without major maintenance. In several <br />locations, underwater voids or undercuts have formed along the in stream <br />structures and banks due to the river's strong currents and we now need <br />maintenance and repair. <br />The engineering consultant, Recreation Engineering and Planning, Inc. (REP), <br />who designed the original project, is also designing the proposed maintenance <br />repairs and will perform construction engineering services. <br />An early repair strategy was identified to address the voids/undercuts that <br />allowed for minimal impact to the river. However, after further investigation of <br />the voids, it was determined this strategy would be difficult to implement and <br />would not provide the structural longevity needed. <br />A new design strategy was developed consisting of a more robust maintenance <br />repair. This strategy has a greater impact on the river, requiring dewatering <br />and construction equipment in the dewatered area, the strategy allows for <br />thoroughly addressing voids with grout and stone, rebuilding banks where <br />necessary, and providing additional anchoring and erosion preventative <br />armoring. <br />This project will take 120 days and project schedule is from September 2021 - <br />January 2022. <br />Mr. Schwarz stated the project will begin in March 2021 to install additional <br />measures to secure left bank and begin daily observations and tend to any <br />issues that develop. Mr. Schwarz mentioned this project is scheduled to start <br />after Rio Vista Falls is complete and will begin January 2022 - March 2022. <br />City of San Marcos Page 21 <br />