TIA Letter 071706#~EA
~~ ARR,~.
July 17, 2006
Jim Gibson, P.E.
Development Services Engineer
City of Yelm
P O Box 479
Yel m, WA 98597
Re: Traffic Impact Analysis -Hutch Subdivision (2n° review)
Shea & Carr #605-O1 (02)
Dear Jim,
We have reviewed the revised Traffic Impact Analysis for the Hutch Subdivision
dated July 12, 2006, prepared by Skillings-Connolly. The proposal is fora 118-single
family subdivision to be located on 19.48 acres between Killion Road SE and
Mountain View Road SE. Two accesses are proposed; one from Killion Road and one
from Mountain View Road.
The revised TIA included most of the requirements in our July 3, 2006 letter;
however, the following comments were not addressed:
1. Trip Distribution
The TIA must include a fgure illustrating distribution of site-generated trips.
2. Turning Movement Counts
Turning movement counts must be included in the appendix.
3. Existing Driveways and Intersections
The TIA should include a site plan that shows dimensions to existing
driveways and intersections on Killion Road and Mountain View Road and a
discussion of the safety of existing accesses. At least one driveway opposite
the Mountain View Road entrance to the subdivision appears to be offset to
the main entrance and may need to be redesigned.
4. Pipeline Development Traffic
The TIA shall include a separate graphic showing pipeline development traffic.
As indicated in our letter of July 3, the City of Yelm bases concurrency on the
weighted intersection average, but also considers the LOS of the individual legs of
the intersection for possible mitigation under SEPA. Therefore, additional
analysis/discussion of the following intersections should be included:
5. W. Velm Avenue and Mountain View Road SE Intersection
This intersection is currently operating at LOS D for the SB approach and
would decline to LOS F for both the NB and SB approaches by 2008. This
project would add 23 southbound trips to the intersection and tlelay times
zN
.wwsn aca.,.<am
HEA
ARR,
]uly 17, 2006
Page 2
would be increased considerably. Discussion in the TIA must address
improvements to return the intersection to pre-project conditions.
6. W. Yelm Avenue and Killion Road Intersection
This intersection will also operate at LOS F for the SB approach. Please
include discussion of recommended improvements to this intersection to
mitigate for project traffic. (A more detailed description of the L.I.D. may
address this comment.)
7. Delays on E. Yelm Avenue
Project-generated trips will add [o the SB and NB approach delays,
particularly at E. Yelm Ave/3`d Street and E. Yelm Ave/4`" Street. The TIA
should include discussion of possible mitigation at these intersections.
The above information can be submitted to the City as an addendum to the Revised
TIA.
If you have any questions, please don't hesitate to contact me at 352-1465.
Sincerely,
Perry A. Shea, P.E.
cc Skillings-Connolly, Inc., P O Box 5080, Lacey, WA 98509
Dan Carruth, WSDOT Olympia Region, P O Box 47440, Olympia, WA 98504-
440 (with copy of revised TIA)
Denny Balascio, Yelm Property Development, P O Boz 2950, Yelm, WA 98597
n:\projects\605-O1 traffic study reviews\o2 Hutch\0]1]06 Hutch 2nd tia review.doc
r -:w-«xi~.- ... n -ter- ..... z ,-.
" www Sbea Carr mm