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Prepared by:
KPFF Consulting Engineers
1601 Fifth Avenue, Suite 1600
Seattle, WA 98101
Phone: (206) 622-5822
KPFF Project No. 2000705
Project: Renton Sunset Gardens
Address: 2900 NE 10th St, Renton, WA 98056
Project Description
Renton Sunset Gardens project proposes a new mixed-used building with public right-of-way
improvements including street widening, concrete curbs, landscaping strips, concrete sidewalks, and
ADA curb ramps. The site is bordered by Northeast 10th Street to the south and Jefferson Avenue
Northeast to the east, north, and west.
Highway Parameters
• Highway Classification: Urban Major Collector
• Posted Speed: 25 mph
• Average Daily Traffic: 3,000 - 14,000 (per functional class definition)
Existing Pedestrian Facilities
There are four existing curb ramps and one marked crosswalk at the intersection of Northeast 10th Street
and Jefferson Avenue Northeast (Commercial Access). There are two existing curb ramps at the
intersection of Northeast 10th Street and Jefferson Avenue Northeast (Residential Access).
Pedestrian Design Standards
Curb Ramps – Landing, DM Section 1510.09(2)(b), September 2021
The running slope of curb ramps shall not exceed 8.3% maximum.
02/18/2022
If the maximum running slope of 8.3% cannot be achieved due to existing physical constraints, the ramp
shall be as flat as possible but the ramp length is not required to exceed 15 feet.
Proposal
All six existing curb ramps within the vicinity of the project will be replaced due to the required frontage
improvements or pavement restoration from utility installation. Per City of Renton’s direction, companion
ramps and new ramps along Jefferson Avenue Northeast (Commercial Access) and Jefferson Avenue
Northeast (Residential Access) are proposed. A total of eleven curb ramps and one marked crosswalk are
included as part of the project.
Ten of the eleven proposed curb ramps and the one marked crosswalk are designed to meet current
WSDOT standards.
The proposed southern curb ramp at the intersection of Northeast 10th Street and Jefferson Avenue
Northeast (Residential Access) is designed to the maximum extent feasible. All curb ramp elements will
meet current WSDOT standards, except for the running slope (11.55%).
Justification
To construct the curb ramp to be 100% compliant would require re-profiling the existing roadway. This
type of major reconstruction is not feasible in this type of redevelopment project.
To construct the curb ramp while maintaining the existing profile of the roadway would require
rebuilding the roadway adjacent to the proposed curb ramps. The rebuilt roadway would result in a grade
change transition within the driving lane that would be undesirable.
Attachments
Plan Sheets
IN COMPLIANCE WITH CITY OF RENTON STANDARDS
1601 5th Avenue, Suite 1600
Seattle, WA 98101
206.622.5822
www.kpff.com
R
Call 811two business daysbefore you dig
RENTON SUNSET GARDENS
2900 NE 10TH ST, RENTON, WA 98056
RENTON SUNSET GARDENSRENTON SUNSET GARDENSTED-40-4199LUA: 21-000168C: 21005145PR: 21-000160R-419906
SITE PLAN
FOR REFE
R
E
NCE ONLYPARALLEL CURB RAMP
DESIGNED TO MAXIMUM
EXTENT FEASIBLE
(SEE ENLARGEMENT TO
RIGHT)
PARALLEL CURB RAMP
SE - 10TH/JEFFERSON (RESIDENTIAL)
SCALE: 1"=10'