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P.0, BOX 12973 | Olympia, WA 98508 1360'519.7251 NATURI\L WATERS Hungry Junction lmprovement Proiect H&H Technical Assistance Natural Waters Scope of Work June 4, 2025 Summary Natural Waters has been requested by Kittitas County Public Works (KCPW)to provide hydrologic and hydraulic (H&H) technical assistance to support the design and construction of the Hungry Junction lmprovement project. The following describes the anticipated scope of work Natural Waters will be assisting KCPW on for this task order. Task 1. Project Management and Meetings Natural Waters will participate in various meetings with the project team. Coordination and project updates will happen throughout project. Assumptions: Up to 16 hours is available for Task 1. This assumes work will occur between June 2025 and December 3t,2025. Task 2. Geomorphology, Hydrology and Hydraulics Natural Waters will perform the following geomorphology, hydrology and hydraulics tasks in collaboration with the KCPW and Jacobs team. Task 2.1 Field Reconnaissance's Natural Waters will conduct field reconnaissance's with KCPW, Jacobs and WDFW staff to examine th.e characteristics of the creek, various culverts, and surrounding riparian corridor with respect to hydraulic, erosion, and scour processes. The purpose of the field reconnaissance's is to understand site hydraulics and channel conditions, with an emphasis on determining an appropriate structure span, creek alignment and potential scour countermeasures for the proposed crossing. Field measurements will include characterizing sediment size, estimating channel/floodplain roughness, assessment of existing scour protection, documenting evidence of erosion, identification of high-water marks, and other relevant information to aid in the assessment and design of the proposed Hungry Junction water crossing. Assumptions: . up to three site visits are budgeted to assess the project site. o Up to 20 hours is available for Task 2.1.