Report_Traffic Assessment 10-1-2021CRYSTAL SPRINGS
TRAFFIC ASSESSMENT
YELM, WA
Prepared for: Evan Mann
Soundbuilt Homes
October 2021
HEATH & ASSOCIATES, INC Transportation and Civil Engineering
10/1/2021
PO Box 397 Puyallup, WA 98371 (253) 770 1401 heathtraffic.com
Date: October 1, 2021
To: Evan Mann
Soundbuilt Homes
evan@soundbuilthomes.com
From: Aaron Van Aken, PE, PTOE
Subject: Crystal Springs – Yelm Traffic Assessment
The intent of this assessment serves to provide trip generation analysis for the proposed
development of 30 single-family units in the city of Yelm. The subject site is located on
4.89-acre parcel #: 22719210403. A description of the project summary is provided below.
Proposed Project
Crystal Springs is a proposed residential development consisting of 30 new single-family
residential dwelling units. The subject site is located east of Crystal Springs Street NW and
north of Yelm Avenue SE. Two points of access would serve the subject property: an
access extending east from Crystal Springs Street NE on the southern property limits and
a connection into an existing cul-de-sac, Woodland Ct SE. Currently, on-site three
structures exist which are to be demolished prior to new construction. Shown below is an
aerial image outlining the subject parcel’s boundaries. A conceptual site plan illustrating
the overall configuration and access is shown in Figure 2.
Figure 1: Aerial Vicinity
HEATH & ASSOCIATES, INC Transportation and Civil Engineering
PO Box 397 Puyallup, WA 98371 (253) 770 1401 heathtraffic.com
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NFIGURE 2HEATH & ASSOCIATESTRAFFIC AND CIVIL ENGINEERINGSITE PLANCRYSTAL SPRINGSPO Box 397 Puyallup, WA 98371 (253) 770 1401 heathtraffic.com 3
Transit Service
A review of the Intercity Transit regional system map indicates the nearest transit route in
the area is served via Route 94. Service is provided from the Olympia Transit Center to the
Yelm Walmart from the hours of 5:40 AM to 8:45 PM. The nearest stop with respect to the
subject site is located at the intersection of Edwards Street NW and W Yelm Avenue
(~0.56 miles southwest walking distance), offering approximately 30-60-minute headways
during peak travel times. Weekend service is also provided. Refer to the Intercity Transit
route schedule for more detailed information.
Trip Generation
Trip generation is defined by the number of vehicular movements that enter or exit a
site during a particular timeframe such as a specific peak hour or an entire day. Trip
generation estimates are based on data from the ITE Trip Generation Manual, 10th
Edition. Crystal Springs Plat is composed of 30 single-family dwelling units. For analysis
purposes, the proposed Crystal Springs land use code is LUC 210 – Single-Family
Detached Housing. Attached to this document are excerpts from the ITE manual for the
utilized land use. Table 1 below summarizes the estimated trip volumes using average
rates.
Table 1: Project Trip Generation
Land Use Dwelling
Units AWDT AM Peak-Hour Trips PM Peak-Hour Trips
In Out Total In Out Total
Single-Family 30 283 5 17 22 19 11 30
The proposed development of 30 single-family units is estimated to generate 22 AM and
30 PM peak hour trips, respectively.
Figure 3 on the following page highlights the project’s trip distribution and assignment
using project trips. The main access point by way of Crystal Springs Street NW is used to
illustrate all PM peak hour trips to and from the site. The majority of traffic is expected to
travel to/from the south with access and connection to Yelm Avenue. Trip distribution may
change when the SR 510 loop to the north gets extended and completed in its
construction.
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Conclusion
Crystal Springs Plat proposes for the construction of 30 new residential dwelling units in
the city of Yelm. The subject property is located on a 4.89-acre site within tax parcel #:
22719210403. Access to and from the site would be provided via two new roadway
connections. One driveway, extending east from Crystal Springs Street NW and the
second access will be achieved by way of Woodland Ct SE, an existing cul-de-sac. Based
on ITE data, the project is estimated to generate 283 average weekday daily trips with 22
trips occurring in the AM peak hour and 30 trips in the PM peak hour.
The project would be subject to City of Yelm Transportation Facilities Charge which are
assessed at a cost of $1,497.00 per new PM peak hour trip. An estimated fee is therefore
as follows:
30 new PM peak hour trips x $1,497.00/trip = $44,910.00. Credit may be received for the
removal of the existing on-site structure(s).
Exact fees and calculations will be determined by the City with current fee schedules at the
time of building permit issuance.
Please call if you require anything further.
Sincerely,
Aaron Van Aken, P.E., PTOE
PO Box 397 Puyallup, WA 98371 (253) 770 1401 heathtraffic.com
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