Attachment_2_-_Design_Stage_Minimum_Content_Requirements.pdf
PDF 392 KB Posted
- Solicitation number
- 2026-RFQ-260
- Issued by
- Pierce County, Washington
About this file
This document is the Design Stage Minimum Content Requirements guidance prepared by Pierce County Planning and Public Works, Surface Water Management Division, for engineering services related to the Setback Levee Projects at 1428 - 128th ST E (Northeast, Southwest, and Northwest Quadrants). The guidance establishes technical standards and deliverable requirements for consulting engineering firms contracted to prepare complete PS&E designs at five completion levels: 15%, 30%, 60%, 90%, and 100%. At the 30% stage, consultants must demonstrate basic project understanding using actual surface data where possible, identify major environmental features such as floodplains, wetlands, and critical areas, establish conceptual alignment and footprint over surveyed topography, document impacted properties and easements, calculate preliminary clearing limits and cut/fill quantities, and develop preliminary cross sections and profiles using AutoCAD with Pierce County CADD Standards (full-size sheets at 1"=20' horizontal scale for plans and 1"=20' horizontal by 1"=5' vertical for profiles). The 60% design phase requires permit-ready deliverables including final concept and footprint over actual surface data, major quantities and elevations, a draft 13-element Stormwater Pollution Prevention Plan (SWPPP) with project-specific BMPs, clearing and grubbing limits, planting plans where applicable, construction sequencing, stream isolation and diversion plans if needed, and all critical cross sections and profiles with hydraulic grade line calculations and culvert sizing.
The 90% phase demands detailed plans, profiles, sections, details, and quantities with concise backup data reflected in the Engineering Estimate, a final draft SWPPP, incorporation of all monitoring and permit requirements, and a draft Operation & Maintenance manual. All design work must utilize current AutoCAD (LDD or Civil 3D preferred) with horizontal alignments created from tangent bearings and distances with circular curves rather than splined polylines, and all alignments must begin and end on local monumentation or Pierce County coordinate systems. The existing ground surface should be surveyed in where practical, with profiles sampled from actual survey data; at the 60% and 90% stages, actual survey data is required unless previously approved by the Project Manager and CE3. AutoCAD files must be transferable with minimal recreation of data. Specific drawing scales and formats are mandated, including 22"x34" Mylar sheets on Pierce County title blocks for full-size plans and 11"x17" sheets for reduced-size sets.
View the file
Other files
Show all 16
On GovTribe
Work with this file
- Download the original file
- Contacts named in this file
- Similar government files
- Ask GovTribe AI about this file
Text version
30% / 60% / 90% DESIGN STANDARD GUIDANCE
SWM-ENGINEERING SERVICES
DRAFTING STANDARDS
• Use current version of AutoCAD (LDD or Civil 3D as preferred), along with Pierce County CADD Standards.
• Horizontal scale for full size (22X34) shall be 1” =20’; Full size profile 1” =20’ horizontal and 1” =5’ vertical.
• Cross section plots at 50’ interval or at major break points; horizontal scale 1” =10’ and vertical scale 1” =2’
• Full size sheets 22X34 Mylar on Pierce County provided title block and border; ½ size sheets 11X17 on Pierce County provided border.
30%
• Display basic understanding of project scope over assumed or actual surface data. Actual data is preferred.
• Major environmental features identified and surveyed i.e. 100-year floodplain, floodways (FEMA, DFF, CMZ), wetlands, critical areas, ordinary high-water mark (OHWM), topography, trees.
• Conceptual project alignment and footprint.
• Include a display of impacted property, including ownerships and easements already owned by Pierce County and those still needed.
• Preliminary clearing limits/acreage of area to be impacted
• Roads, utilities, and structures within 500 feet of project location (distance can be less based on professional judgment).
• Horizontal alignments shall not be created from splined polylines; use Tangent with bearing and distance alignment and circular curves.
• Horizontal alignment beginning and ending locations shall be on local monumentation (Pierce County) or coordinate system.
• The existing ground (EG) surface should be surveyed in where practical, Surfaces generated by contours, or taken from Lidar data may also be acceptable depending on site conditions. Vertical alignments (profiles) shall be sampled from this EG surface.
• Preliminary cut/fill quantities and grading plan.
• Preliminary cross sections and profiles.
60%
• Need to display enough information to be presented to permit agencies (permit ready). Confer with Environmental Lead and Project Biologist prior to 60% review.
• Display final concept and footprint established over actual surface data.
• Major quantities, significant elevations, profile grades, and detail drawings with backup data for major quantity calculations.
• Cut and fill quantities.
• Ordinary High-Water encroachment areas and associated encroachment volume calculations.
• Some structure notes shall be included in the plan set with backup data for quantity calculations.
• Rough draft (13) element Stormwater Pollution Prevention Plan (SWPPP) with project specific Best Management Practices (BMP). Clearing and grubbing limits showing disturbed area calculation.
• A draft Planting shall be included (when applicable). General plant types, plant establishment, soil preparation specific to the project shall be shown. Use of irrigation systems should be avoided if feasible.
• Construction sequencing (if applicable). General construction sequencing, site access, staging areas, detour/road closure specific to the project.
• Stream Isolation and Diversion Plan, if needed. Include any notes on fish removal plan.
• All cross sections for critical permitting details, i.e. streams, pools or log jams.
• Profiles with enough detail to determine hydraulic grade lines and/or fish passage features such as riffles, runs, and pools.
• Culvert sizing and calculations.
• The existing ground (EG) surface shall be created by actual survey data unless previously approved by Project Manager and CE3. Vertical alignments (profiles) shall be sampled from this EG surface.
• AutoCAD files should be transferable at this stage with little to no recreation of data required.
• Horizontal alignments shall NOT be created from splined polylines; use Tangent with Bering and distance alignment and circular curves.
• Horizontal alignment beginning and ending locations shall be on local monumentation (Pierce County) or coordinate system.
90%
• Detailed (precise) plans, profiles, sections, details, quantities, permits, and specifications.
• Quantities shall be calculated and shown in plans with concise backup data provided, and reflected in Engineering Estimate.
• Final draft (13) element SWPPP plan with project specific BMP’s.
• Any monitoring plans, sequencing plans, or permit requirements have been incorporated.
• Draft Operation & Maintenance manual.
File details come from the government source that posted it. Updated .