HomeMy WebLinkAbout32B_Roadway Width Response 2025-0829
520 Kirkland Way, Suite 100, Kirkland, WA 98033
(425) 889-6747 www.tenw.com
MEMORANDUM
DATE: August 29, 2025
TO: Cristina Haworth, AICP
Jefferson County
FROM: Elyse Stemmler, PE
TENW
SUBJECT: Minimum Roadway Width – Response to SUB2023-00025 Technical Review Comments
Pleasant Harbor Master Planned Resort
TENW Project No. 2901
This memorandum summarizes the potential road modifications to Pleasant Harbor Master Planned
Resort project in response to the August 19, 2025 meeting with Jefferson County. The proposed
modifications may have a minimal effect on the submitted plat falling within “JCC 18.35.330 – Minor
modifications to a final long plat”.
Overview of Design Context
The potential road modifications to the Pleasant Harbor Master Planned Resort project are summarized
below, Table 1. The Jefferson County Code (JCC) Title 18 Unified Code Development, Chapter 18.30
Development Standards, Section 18.30.080 Roads adopts the American Association of State Highway and
Transportation Officials (AASHTO), A Policy on Geometric Design of Highways and Streets, and Washington
State Department of Transportation (WSDOT) Design Manual. The roadway segments have been
categorized based on presence of vertical curb and ADT. Roadway segments with vertical curb follow
WSDOT Design Manual standards, Exhibits 1231-1, 1239-1, and 1239-11 for roadways with a speed less
than or equal to 35 MPH, Attachment A. Roadway segments with no vertical curb and ADT greater than
400 veh/day follow standards from A Policy on Geometric Design of Highways and Streets (AASHTO) Table
5-5, Attachment B. Roadway segments of Local Access Roadways with no vertical curb and ADT less than
400 veh/day follow Jefferson County Road Standards adopted as part of Resolution 60-22, November 21,
2022, Attachment C. The classification of roadway segments is marked on the site plan, Attachment D.
Additional modifications to the Pleasant Harbor Master Planned Resort project include shifting the shared-
use path to the outside of the bio swale throughout the site to achieve the 3’ minimum buffer requirement
for a shared-use path per WSDOT Design Manual Exhibit 1515-4, Attachment A.
Exhibit 32B
Minimum Roadway Width Memo
Pleasant Harbor Master Planned Resort (Jefferson County)
August 29, 2025
Page 2
Table 1: Roadway Segment Modification Summary
Please contact me at (425) 223-0851 or elyse@tenw.com with any questions.
Attachments
Attachment A – WSDOT Design Manual, Exhibits 1231-1, 1239-1, 1239-11, and 1515-4
Attachment B – AASHTO – A Policy on Geometric Design of Highways and Streets, Table 5-5
Attachment C – Jefferson County Road Standards, November 21, 2022
Attachment D – Proposed Site Plan and Roadway Sections
Exhibit 32B
Minimum Roadway Width Memo
Pleasant Harbor Master Planned Resort (Jefferson County)
August 29, 2025
Page 2
ATTACHMENT A
WSDOT Design Manual, Exhibits 1231-1, 1239-1, 1239-11, and
1515-4
Exhibit 32B
WSDOT DESIGN MANUAL
CHAPTER 1231 - GEOMETRIC CROSS SECTION - HIGHWAYS
WSDOT DESIGN MANUAL
CHAPTER 1239 - GEOMETRIC CROSS SECTION - SHOULDERS, SIDE SLOPES,
CURBS, AND MEDIANS
Exhibit 32B
WSDOT DESIGN MANUAL
CHAPTER 1515 - SHARED-USE PATHS
Exhibit 32B
Minimum Roadway Width Memo
Pleasant Harbor Master Planned Resort (Jefferson County)
ATTACHMENT B
AASHTO A Policy on Geometric Design of Highways and
Streets, Table 5-5
Exhibit 32B
Exhibit 32B
Minimum Roadway Width Memo
Pleasant Harbor Master Planned Resort (Jefferson County)
ATTACHMENT C
Jefferson County Road Standards, November 21, 2022
Exhibit 32B
Jefferson County Road Standards, adopted as part
of Resolution 60-22, November 21, 2022
Exhibit 32B
Minimum Roadway Width Memo
Pleasant Harbor Master Planned Resort (Jefferson County)
ATTACHMENT D
Proposed Site Plan and Roadway Sections
Exhibit 32B
1234567891011121314151620' roadway and 3' shoulder;AASHTO Table 5-5 (400-2000 ADT)22' roadway and 6' shoulder;AASHTO Table 5-5 (>2000 ADT)22' roadway and 2' shoulder;JEFFERSON CO Road Standards (Local Access Road <400 ADT)20' roadway with vertical curb and no shoulder;WSDOT Design Manual Exhibits 1231-1, 1239-1, 1239-11 (<35 MPH)Exhibit 32B