Exhibit_C_-_Detailed_SOW_for_SE_Quadrant.pdf

Complete PS&E Engineering Design Package and Services Consultant Scope of Work Summary Planning and Public Works – Surface Water Management (PPW-SWM) 1428 128th ST E – Southeast (SE) Quadrant Setback Levee/Revetment Project

Project Overview, Purpose and Primary Goals

The purpose of this Request for Qualifications (RFQ) is to retain a consultant to develop, prepare, and provide complete engineering design plans to 30% design for three setback alternatives, plus analyses for a no change alternative for the Southeast (SE) Quadrant Setback Levee/Revetment project. The three alternatives as they were identified and assessed in the completed 128th Street East Comprehensive Setback Levee Feasibility Study, dated May 2023 are 1) a full setback levee alternative, 2) a partial setback levee alternative, and 3) a larger, hybrid version of a partial setback that would generally follow McCutcheon Road. The full setback alternative will open approximately 91 acres of the floodplain. The small partial setback alternative will open approximately 15 acres of the floodplain. The McCutcheon Road hybrid partial setback alternative will open approximately 40 acres.

The SE Quadrant Setback Levee/Revetment project is located along the east side (right bank) of the Puyallup River, south of 128th Street East (approximately between river miles 16.7 and 17.5). The length is approximately 5,300 Lin-Ft. The feasibility study can be viewed via this link: 128th ST E Comprehensive Setback Levee Feasibility Study.

See the attached project Site Vicinity Map for a visual reference. Also attached is a Setback Conceptual Map exhibit of the SE Quadrant Setback project which illustrates the spatial extents of the 3 alternatives.

The conceptual map exhibit is from the completed 128th Street East Comprehensive Setback Levee Feasibility Study, dated May 2023.

The primary goals of the proposed project are to provide flood risk reduction, to increase and improve aquatic habitat, and water quality benefits.

Major scope of work tasks for the SE Quadrant Setback Levee/ Revetment includes advancing the existing 5% concept alternatives from the feasibility study, through Stage 2 (15%) and then Stage 3 (30%). These 30% design deliverables completed for each of the 3 alternatives will inform a future chosen SE Quadrant project design alternative, which will be developed through to a 100% design and PS&E drawings at an undetermined date in the future. See Attachment 1 for the PPW-SWM Stage Gate Delivery Process for more information.

Major scope of work tasks for the SE Quadrant Setback Revetment includes a Delivery Strategy Plan. This is a plan that addresses how the design, property rights, funding, permitting, and construction are progressed for the NW, SW, and NE Quadrant setback projects, and then how this work will be initiated in the SE quadrant. This plan may include how all three other setback quadrants (SW, NE, and NW) might advance together and at other times or scenarios where a specific quadrant may accelerate forward. The delivery strategy will also need to include proposed ranking methodology of potential setback alternatives in the Southeast (SE) Quadrant area and a recommended preferred alternative. The recommended alternative will be included in the comprehensive reach length hydraulic modeling along with that work done for the NE, SW, and NW Quadrant setback projects.

https://www.piercecountywa.gov/6867/128th-Street-Comprehensive-Setback-Levee https://www.piercecountywa.gov/6867/128th-Street-Comprehensive-Setback-Levee

Other associated tasks for the project include hydrologic and hydraulic modeling basis of design reports, geotechnical evaluation and investigation, preparing property acquisition plan, providing stakeholder and public outreach support, preparation of and providing completed FEMA Conditional Letter of Map Revision (CLOMR) application(s) with associated required hydraulic modeling, documentation, and other associated task items.

It is assumed that the FEMA CLOMR review and approval for the SE Quadrant Setback project will also include the NE, SW and NW Quadrant Setback projects, rather than obtaining separate CLOMRs for each of the quadrant setback projects.

It is also assumed that the FEMA CLOMR and associated modeling data for the Planning and Public Works Office of the County Engineer (PPW-OCE) Rhodes Lake Roads Corridor (RLRC) project will be the basis for the NE, NW, and SW Quadrant Setback projects to build from. As of September 2026, FEMA has not issued a CLOMR for the RLRC project.

Meetings with FEMA and the Pierce County Floodplain Administrator will be required to determine and establish an approved approach and submittal to obtain a FEMA CLOMR respective to the NE, SW, and NW, and SE Setback projects and the RLRC project CLOMR.

The SE Quadrant setback project will produce analyses and 30% design deliverables for three alternatives and a no-action alternative. These analyses will enable Pierce County to choose a future SE Quadrant setback levee alignment with which to continue through the stages toward a complete 100% design. Critical levee, revetment, bioengineering, off-channel fish habitats, floodplain plantings and other elements will be designed at these later stages

Task 1. Project Management

• Prepare an Itemized Project Task and Sub-Task Summary including associated costs for Progress Tracking and Billing Invoice purposes.

• Prepare a schedule for the Scope of Work tasks, including major milestones, and deliverables with dates.

• Perform Data Gap Analysis.

• Attend and participate in every other month (or more frequently as may be needed) project status update team meetings with PPW-SWM as needed to completion of the 30% designs and alternatives analyses.

• Monthly Status Reports.

• Monthly Invoice Billings.

• The work and tasks shall follow the PPW-SWM Stage-Gate Progression Process, to the applicable extent. Each Stage Gate shall go through a Gate Review and Approval with PPW- SWM Management, prior to progressing to the next stage.

• Identify private properties that will need to be accessed for the preliminary design work, so that PPW-SWM can pursue and obtain Right of Entries (to the extent possible).

• Attend one field on-site project Kick-Off Meeting.

Task 2. Data Collection

A. Review Existing Available Data and Collect New Data

• Review available existing data sets relative to the project (i.e. LiDAR topography, bathymetry data, other topo survey, hydrologic and hydraulic (H&H) models, environmental data, critical and sensitive areas, etc.)

• Identify Topographic Survey Data Needs (upstream, downstream, across stream, above river channel, below river channel, and water body areas including adjacent floodplains and wetlands)

• Consultant shall retain a bathymetry survey consultant to collect any needed bathymetry channel and water body data.

• PPW-SWM will perform topographic survey of upland areas, above river channel and water bodies.

• Arrange for Utility Field Locations.

• Prepare Recommendation Summary for any additional data needed for the preliminary design work.

B. Hydrologic and Hydraulic Modeling

• B1. Review of Existing H&H Data o Review and synthesize information from existing hydrologic and hydraulic analysis, models, and reports. This includes:

- PPW-Office of the County Engineer (OCE) Rhodes Lake Road Corridor (RLRC) Project

- PPW-SWM 128th ST E Setback Levee Feasibility Study (May 2023)

- PPW-OCE McCutcheon Road Canyon Falls Creek Culvert Replacement Project H&H

Analysis and Modeling.

- FEMA Effective FIRM and FIS H&H Analysis and Models (which include riverine seclusion areas).

- Draft Federal Emergency Management Agency (FEMA) Flood Insurance Rate Map (FIRM) and Flood Insurance Study (FIS) H&H Analysis Models Update (which was never adopted by FEMA; however, Pierce County uses the model results as best available data for regulatory and permitting purposes).

- Update existing USGS Gage records for peak flow regression analysis (as may be needed).

- Other existing H&H analysis and models as applicable

• B2. H&H Modeling and Analysis o The underlying presumption is that the proposed new setback levee features will not be accredited.

o A design objective for the setback feature is to achieve 100-year Level of Protection plus

3-Ft of Freeboard and to withstand erosion forces and impacts. Levee features and segments shall be designed to meet current US Army Corps of Engineers levee certification standards.

o Establish criteria and approach for H&H modeling early on with the Pierce County Floodplain Administrator.

o Identify any other concerns and/or issues as it pertains to Zero Rise Certification and FEMA CLOMR approval.

o Perform H&H analysis and modeling (2-D) for Existing Conditions, with levees in-place.

o Perform H&H analysis and modeling (2-D) for Existing Conditions, without levees in-place.

o Perform H&H analysis and modeling (2-D) for Proposed Conditions with Climate Change Factors. Climate Change Factors shall not be included for Zero Rise and CLOMR H&H analysis.

o Perform Updated H&H analysis and modeling (2-D) that accounts for:

- The RLRC project proposed improvements (i.e. existing and proposed roadways, new bridge structure, culverts, stormwater facilities, etc.).

- The OCE CRP-5846 McCutcheon Road and Canyon Falls Creek Culvert Replacement project (Note: available design details may be limited and not fully available initially).

o Perform Zero Rise Analysis and Hydraulic Modeling to identify and determine Base Flood

Elevation Impacts, impact locations (including the project limits, upstream, downstream, and across stream, existing house structures, infrastructure, public, and private property).

• B3. SE Quadrant Setback Revetment Alternatives o Develop and perform H&H analysis and modeling.

o Identify and evaluate base flood elevation and property impacts for all 3 alternative setback extents. This assessment will assist with development of a property acquisition plan, as well as selecting a preferred alternative in the future. Perform Updated H&H analysis and modeling (2-D) that accounts for differences between the alternatives. (i.e., both partial setback alternatives may show the new setback levee between an unnamed tributary and the Puyallup River, necessitating an analysis of how those flows and potential fish passage will pass through the new levee structure.)

o Perform additional H&H analysis and modeling (2-D) as needed, to identify measures, features, and/or actions to mitigate for Zero Rise impacts.

o Prepare a H&H Technical Report (draft and final versions).

C. Property Acquisition Plan

• Identify affected properties.

• Prepare a draft Property Acquisition Plan based on modeling results, identified impacts, and proposed design.

o The Property Acquisition Plan includes drawings, property areas (full and partial areas), full and partial property acquisitions, owner name, site address, delivery address, parcel number, etc.

D. Sediment and Geomorphic Analysis and Evaluation

• Review and synthesize existing geomorphic and sediment information and analysis.

• Perform sediment evaluation and analysis for existing conditions.

• Perform sediment evaluation and analysis for proposed conditions.

• Perform sediment evaluation and analysis for proposed conditions with climate change factors.

• Sediment collection sampling and lab analysis with report.

• Evaluate and analyze the risk of terrace, levee, revetment, and hillside slope bank erosion impacts for existing conditions and proposed project conditions.

E. Environmental Evaluation and Assessments

• The assumption is that the project will need to obtain a USACE Individual 404 Permit and WA Department of Ecology 401 Water Quality Certification.

• Prepare a permitting strategy and schedule outline and report to coordinate efforts with the PPW-SWM Biologist.

• Wetland delineation of affected areas and survey point mapping of wetland delineation (for locations where legal right of entry is obtained by Pierce County).

• Evaluate and analyze existing wetlands within the project and affected areas.

• Identify wetland impacts.

• Perform and prepare a wetland evaluation, analysis, and mitigation plan and report (draft and final versions).

• Perform and prepare a Fish and Wildlife Habitat evaluation, assessment, mitigation plan, and report (draft and final).

• Identification, delineation, and mapping of Ordinary High Water Line (OHWL) of the river, water bodies, side channels, and wetlands.

• Derive and provide all relevant information, plans, maps, and data to populate State Environmental Policy Act (SEPA) Checklist and Joint Aquatic Resources Permit Application

(JARPA).

• Prepare Shorelines Compliance Data and a report to support required applicable permits.

• Prepare WA Department of Natural Resources Aquatic Lands Use Data and Report for permitting purposes.

• Perform and prepare Endangered Species Act Biological Assessment and Evaluation (draft and final).

• Perform and prepare a Cultural Resources Study Assessment, Evaluation, and Report for Cultural Resources requirements (draft and final).

• Develop and prepare a report for PC Code 18E110.020 Erosion Hazard Report/Geotechnical Analysis (draft and final).

• Prepare digital maps, plans, and attribute table that contains GIS data information respective to the proposed design measures and features, wetland delineation, mitigation measures and their locations. This will help to provide a tool to navigate various measures and features specific field site locations.

• Develop and prepare a report for USACE 404/408 to address PL84-99 levee removal/breach data, information and requirements (draft and final).

• Provide other and overall permit application(s) support as needed.

Task 3. Design Stage 2 (15%) Planning and Pre-Design – Progress the chosen 5% conceptual alternative to 15% as a proof of concept/refinement, prior to progressing the alternative to the 30% design stage.

o Progress the 3 Setback Levee/Revetment Alternatives from the completed 128th ST E Comprehensive Setback Levee Feasibility Study (May 2023) for the SE Quadrant Full Setback Levee/Revetment Alternative.

o Refinement options for each of the three Setback Levee/Revetment Alternatives may include several options, shall incorporate significant terrain modifications, updated hydrologic and hydraulic modeling, existing and proposed features, in which the completed feasibility study did not incorporate. This includes proposed features for the Rhoades Lake Road Corridor project and McCutcheon Road Canyon Falls Creek Culvert Replacement projects.

o The three conceptual alternatives and their elements include unique features to be progressed. These unique features have been generally described in the 128th ST E Comprehensive Setback Levee Feasibility Study (May 2023).

o Full Setback Levee/Revetment Refinement options will include conceptual level design drawings and cost estimates.

o Include a Risk Assessment for each identified refined option. Risk Assessment shall include environmental, permitting issues and concerns, and property rights.

o Prepare a technical information report of the refinement options, including drawings, cost estimates, maps and other associated documents.

o Conduct up to two meetings with PPW-SWM to review refinement options leading to the selection of a preferred alternative, by PPW-SWM.

Task 4. Design Stage 3 (30%)

• Develop and prepare draft and final 30% engineering construction design plans, applicable details, special notes, for the selected preferred alternative (see Attachment 2 for summary of 30% design minimum content.

• Finalize Property Acquisition Plan.

• Prepare cost estimates to acquire the properties identified in the Property Acquisition Plans.

• Other Associated Tasks and Items include (but not necessarily limited to) the following:

o Cover Sheet o Key and Vicinity Maps o Legend o Survey Information o Summary of Quantity Tables

• Prepare construction cost estimate for the selected preferred alternative. This includes materials and associated quantities.

• Prepare Basis of Design Reports for this stage of design.

• Prepare Drainage Reports for this stage of design.

• Incorporate measures and features to protect the existing terrace bank and adjacent land/property from river migration and erosion.

• Include recommendations for Geotechnical Investigation and Analysis that will be needed for 60% design level plans.

• Utilize PPW-SWM drawing sheet templates.

• Final Risk Assessment.

• Address and prepare responses to review comments from public and stakeholder outreach events.

• Develop and prepare a Recommended Delivery Strategy and Timelines for each of the NE, SW, NW, and SE Quadrant Setback projects.

Task 5. FEMA Conditional Letter of Map Condition (CLOMR): NE, NW, and SW Quadrant Setback Levee/Revetment (Stage 4)

• Finalize Hydrologic and Hydraulic Analysis and Modeling.

• Provide support to PPW-SWM for FEMA CLOMR requirements and procedures. This will involve attending meetings with FEMA to determine an allowable and FEMA approved approach to pursue and obtain a FEMA CLOMR for both the NE and SW Quadrant setback projects and respective to the RLRC project.

• Prepare draft and Final FEMA MT-2 Application including all required supporting documentation, narrative, forms, analysis, modeling, maps, exhibits, and other associated items.

• Manage FEMA CLOMR Application, Submittal, Review, and Approval Process. This includes responding to multiple rounds of FEMA review comments, preparing and submitting required documents, maps, analysis, modeling, etc.

• Timeframe for FEMA CLOMR Review and Approval process assumes 1.5 years, from MT-2 Application Submittal.

Task 6. Public Outreach and Education Support: SE Quadrant Setback Levee/Revetment (Stage 5)

• Prepare a Public Outreach Plan in collaboration with PPW-SWM and the Pierce County Communication Department.

• Attend up to two (virtual and one In-Person) Community, Landowner, and Stakeholder Outreach meetings/events for the 30% design level plan phases.

• Provide map exhibits and handouts that clearly illustrate and explain the proposed design alternatives and identified refined options.

• Prepare a Q&A Hand-out and Talking Points Summary.

• Document public outreach discussions, input and comments.

• Address and prepare responses to public and stakeholder outreach comments.

• Coordinate and support PPW-SWM and the Pierce County Communication Department staff for outreach and community meeting effort and events.

• Coordinate and collaborate with PPW-SWM to address submitted public comments and to help prepare comment responses. Comments received may result in design refinements.

• Attend One Field On-site Meeting with Regulatory and Tribal Resource Agencies. Provide drawing map exhibits of the proposed designs and identified refined options and preferred selected refined option, for the field site meeting.

Task 7. Other Items Associated with the SE Quadrant Setback Levee/Revetment

• Submit report on 30% design for the 3 alternatives along with updates on the analyses that were completed for the 2023 128th St East Comprehensive Setback Levee Feasibility Study.

• All documents developed and prepared for the above scope of work summary shall be provided. to PPW-SWM. This includes but is not limited to the following:

o Native word, excel, PowerPoint, AutoCAD drawing files, PDF, and other applicable digital files o Native H&H model files.

o Calculations.

o Bathymetry survey files.

o All supporting documentation including map exhibits, notes and other applicable files and documents.

o Other applicable data, documents, and information not listed above.