HomeMy WebLinkAboutTrans 2016-02-16 Item 2A - Discussion - 53rd Avenue South (South 137th to South 144th) Roadway Layout OptionsCity of Tukwila
Allan Ekberg, Mayor
Public Works Department - Bob Giberson, Director
INFORMATIONAL MEMORANDUM
TO: Mayor Ekberg
Transportation Committee
FROM: Bob Giberson, Public Works Director
BY: Ryan Larson, Senior Program Manager
DATE: February 12, 2016
SUBJECT: 53rd Ave S (S 137th St — S 144th St)
Project No. 99110301
Roadway Layout Options
ISSUE
Present design options for Council consideration and direction with the existing right -of -way (ROW)
constraints.
BACKGROUND
Roadway improvements for 53rd Ave S from S 137th St to S 144th St are currently in the preliminary
design phase with KPG, Inc. The project has received $2,141,400.00 in State Transportation
Improvement Board (TIB) funding and must meet TIB's minimal roadway design requirements that
include sidewalks on both sides of the roadway. The City's Walk and Roll Plan has designated this
route to include shared vehicle /bicycle facilities (sharrows). Due to the limited ROW width of 40 feet on
53rd Ave S and the roadway's topography, fitting the planned roadway improvements within the existing
right -of -way will be challenging.
DISCUSSION
The development of preliminary 53rd Ave S roadway concepts has underscored the fact that even the
most basic street section (two vehicle /bike lanes & two sidewalks) will use all of the available right -of-
way. The adopted Comprehensive Plan recommends constructing new improvements that create a
"complete street" in an effort to serve various users and modes of travel. The menu of improvements
creates the possibility of several roadway layout options, most requiring significant additional right -of-
way.
KPG has developed four roadway design options:
• Option 1: 13 feet sharrow lanes, no landscape planter, and 5 foot sidewalks. Option 1 would
require a total of 40 feet ROW and no additional ROW acquisition.
• Option 2: 14 feet sharrow lanes, 5 foot landscape planters, and 5 foot sidewalks. Option 2 would
require a total of 51 feet of ROW and 11 feet of additional ROW acquisition.
• Option 3: 11 foot travel lanes, 5 foot bike lanes, no landscape planters, and 5 foot sidewalks.
Option 3 would require a total of 47 feet of ROW and 7 feet of ROW acquisition.
• Option 4: 11 foot travel lanes, 5 foot bike lanes, 5 foot landscape planters, and 5 foot sidewalks.
Option 4 would require a total of 55 feet of ROW and 15 feet of ROW acquisition.
W IPW Eng.PROJECTSIA- RW & RS Prolectst53rd Ave S (99110301)IDesignllnfo Memo Design Options 02.1216 RRT gl doss
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53rd Ave S Roadway Layout Options
February 12, 2016
Page 2
A limited budget of $100,000 is available for ROW. Of the four options being considered, only Option 1
primarily fits within the limited 40 feet of existing ROW, but requires a reduced width sharrow lane.
Option 1 meets the requirements of the TIB grant and can be built with the least impact to adjacent
properties. Option 2 could be constructed three different ways; along the entire length of the 53rd Ave S,
only in segments, or on only one side of the roadway, if additional ROW can be obtained. Options 3
and 4 would require a consistent cross - section throughout the majority of the roadway to keep a
uniform bike lane width.
For any option chosen that would require significant ROW, it is assumed that adjacent property owners
would be requested to donate the right -of -way, as the available budget could not accommodate paying
fair market value for all of the ROW needs. The current $100,000 ROW funding would construct
improvements primarily limited to the existing 40 foot ROW. The exception would be in areas where the
City would be able to obtain additional ROW donated by individual property owners along 53rd Ave S.
The City successfully took this approach for Phase I of the 42nd Ave S Project.
Property owners who cannot or choose not to donate ROW from their property would have basic
project improvements constructed within the existing ROW adjacent to their property. If a property
owner desires more extensive street improvements, donation of additional ROW would be necessary.
Several consecutive properties would need to be in agreement for this approach to work, since short-
widened sections would not be feasible.
In addition to the ROW limitations, the topography of the area and existing improvements limit the
amount of widening that could be accomplished. Several homes are close to the ROW and significant
widening will impact site improvements, including driveways.
RECOMMENDATION
With Committee concurrence, staff proposes to conduct a neighborhood Open House for the 53rd Ave S
street improvements to discuss the four design options in order to assess if there is sufficient interest to
proceed with anything other than Option 1, keeping all improvements within the 40 foot ROW. Individual
meetings with property owners may also be required to further discuss design options.
Attachments: Page 6, 2015 CIP
Options 1 — 4 Typical Roadway Sections
Perspective Drawings Options 1 & 2
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PROJECT:
DESCRIPTION:
JUSTIFICATION:
STATUS:
MAINT. IMPACT:
COMMENT:
CITY OF TUKWILA CAPITAL PROJECT SUMMARY
2015 to 2020
53rd Ave S (S 137th St - S 144th St) Project No. 99110301
Design and construct urban residential street improvements that include curb, gutter, sidewalk, undergrounding,
and illumination. Street will coordinate with Water $1.1m, Sewer $830k, and Surface Water $1.5m CIP projects.
Provide pedestrian and vehicle safety, drainage, and neighborhood revitalization.
Undergrounding is included in the estimate at this time. Grant applications in 2014 for 2015/16.
Reduce pavement, shoulder, and drainage work.
State TIB & Pedestrian Safety grants are proposed with Water, Sewer and Surface Water as match.
See additional pages in Enterprise funds under 53rd Ave S Projects. Seattle City Light is now negotiating
a 60/40 underground split and undergrounding costs have been added to project.
FINANCIAL
in $000'sl
Through Estimated
2013 2014 2015
2016 2017 2018 2019 2020 BEYOND TOTAL
EXPENSES
Design
190
3
193
Land (R/W)
100
100
Const. Mgmt.
120
120
240
Construction
800
800
1,600
Undergrounding
2,250
2,250
TOTAL EXPENSES
0
0
290
3,173
920
0
0
0
0
4,383
FUND SOURCES
Awarded Grant
0
Proposed Grant
174
1,082
507
1,763
Seattle City Light
1,350
1,350
Bond
0
City Oper. Revenue
0
0
116
741
413
0
0
0
0
1,270
TOTAL SOURCES
0
0
290
3,173
920
0
0
0
0
4,383
2015 - 2020 Capital Improvement Program
6
3
Option 1
Option 2
ROW
ROW
T
53RD AVE S
BETWEEN S 144TH ST TO S 137TH ST
TYPICAL ROADWAY SECTION
OPTION 1: SHARROW LANES
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ROW
ROW
0
cl-
53RD AVE S
BETWEEN S 144TH ST TO S 137TH ST
TYPICAL ROADWAY SECTION
OPTION 2: SHARROW LANES WITH PLANTER
ROW
ROW
in
ccS
53RD AVE S
BETWEEN S 144TH ST TO S 137TH ST
TYPICAL ROADWAY SECTION
OPTION 3: BIKE LANES
03
ROW
ROW
0
d-
in
In
53RD AVE S
BETWEEN S 144TH ST TO S 137TH ST
TYPICAL ROADWAY SECTION
OPTION 4: BIKE LANES WITH PLANTER