HomeMy WebLinkAboutSEPA EPIC-ND-15 - OLDRIGHT BOB - REZONEOLDRIGHT REZONE
INTERURBAN AND
SOUTHCENTER BLVD
EPIGND -15
ATTACHMENT G
40J
CITY OF TUKWILA
PLANNING DEPARTMENT
STATEMENT OF DECLARATION
FILE #MF- 75 -13 -R
APPLICATION FOR A REZONE OF A CERTAIN PROPERTY WEST OF AND
ADJACENT TO THE INTERSECTION OF INTERURBAN AVENUE AND SOUTH -
CENTER-BOULEVARD FROM R -4 AND C -1 TO C -2.
Applicant - Bob Oldright
INTRODUCTION:
The following is a Statement of Declaration by the undersigned
as the Responsible Official pursuant to Title 18.98 of the
Tukwila Municipal Code and the Washington State Environmental
Policy Act of 1971.
An Environmental Assessment has been completed on the proposed
legislation and has been taken into consideration in this
Declaration.
DECLARATION:
Based upon the Environmental Assessment as prepared,. Section
18.98 of the Tukwila Municipal Code dealing with environmental
policy and the guidelines issued by the Washington State Depart-
ment of Ecology for the implementation of the State. Environmental
Policy Act, I find that the proposed rezone application from R -4.
and C -1 to C -2 will not have a significant effect upon the envir-
onment and therefore a complete Environmental Impact Statement is
not required.
The City reserves the right to require an additional environmental
review, and full Environmental Impact Statement if deemed necessary,
at such time as a building permit is applied for on the property..
PALNNING DEPARTMENT
1
KS /cw
September 8, 1975
(Date)
.
- REZONE (01dright)
Int* Jan Ave & Southcenter Blvd.
CITY OF TUKWILA
ENVIRONMENTAL ASSESSMENT
#75 -13 -R
A. THE PROPOSED ACTION:
This environmental assessment has been prepared to report, the potential
impact of a proposed rezoning of certain property located near the inter-
section of 'Interurban Avenue and Renton -Three Tree Point Road from C -1
and R -4 to C -2, (SEE, Attachment A). The applicant has submitted a site
plan with the application showing plans for a restaurant - cocktail lounge
with 190 parking spaces, (SEE, Attachment B).
A negative declaration of environmental impact for this rezone request is .
included with this assessment as Attachment G. .
B. JUSTIFICATION:
The proposed rezone has been applied for in accordance with the require-
ments of the City of Tukwila zoning ordinance, Title 18.
C. LOCATION:
The subject property is located on the west side of and'adjacent to the
intersection of Interurban Avenue (S.R. 181) and Renton-Three. Tree Point
Road. The legal description of the subject property is as follows:
"That portion of Tract 28, Interurban Addition to Seattle, according to
plat recorded in Volume 10 of Plats, page 55, in King County, Washington,
lying southwesterly. of the River Street (Secondary State Highway No. 5 -M)
and westerly of the Renton -Three Tree Point Road (Secondary State highway
No. 1 -L.)
EXCEPT that portion lying between the westerly junction of said roads and
a line drawn parallel to the west line of said Tract 28, through a point
100 feet due west of.the most easterly point in the westerly line of said
junction; and
EXCEPT Railroad right -of -way, if any;
AND EXCEPT that portion conveyed to State of Washington Auditor's File No.
5528323.
D. HISTORICAL BACKGROUND:
The best information available indicates that prior to September 1971 the .
subject property was zoned R -1, single. family residential. On September 7,•1971,
the eastern portion of the site was rezoned by Ordinance 1t683 to C -1 (Neighbor-
' hood Retail Business) and the western portion to R - -4 (Apartments), cOnditi.oned
upon a Concomitant Zoning Agreement with the City of Tukwila. According to
Ordinance #683, included herewith as Attachment D, this agreement was executed.
r
in 1971 for rezoning the eastern
Although the application for rezoning �-
portion of the site to C -1, and the subsequent official action of the City
through Ordinance t }683 was to grant the
oneously ifound itswaysonto the city to
C -1, the zoning designation which
zoning map was C -2. Thus, the eastern portion of the subject site is shown
to be'C =2 on the city zoning map in Attachment
zoning is C -1. This mistake has been
Attachment A.
PUBLIC PARTICIPATION:
.Application for the rezoning from C -1 and R-4JtoyC -2 classification was
made with the Tukwila Planning Departure
hearing before the Tukwila Planning Co miss n was dvertised inthe Renton
Record-Chronicle and scheduled for S P 197 the rezone Planning
ane will
Commission's response is favorable to the rezone request,
go before the Tukwila City Council.
F. RELATIONSHIP TO EXISTING LAWS, POLICIES, AND PLANS:
At the P resent time the subject property and the general vicinity of the
rezone is identified on the Comprehensive plan Map
as
family, (SEE, Attachment E). P but the logically
includes the R -2, R -3, R -4 and RMH zoning classifications,
plan makes no reference as to the density of this multiple family development.
•
Though the subject property falls within 200 feetotheOeordinary ghigh water
g
mark of the Green River, the act of rezoning property
shoreline development permit. However, at suehmti su beect property
.would be developed, a shoreline developme p
G. ACTION REMAINING FOR IMPLEMENTATION:
The rezone application must go before the Tukwila Planning Commission
at an advertised public hearing on September 25, 1975. If approved by
the Planning Commission, the rezone request will go before the Tukwila
City Council for final disposition. If denied Cbynci the _Commission, the
applicant may appeal the decision to
H. EXISTING CONDITIONS:
1. Zoning and Land Use. The existing zoning nishlo subject p}hi property is R-4
C
and C -1. The R -4 zoned portion of property
portion.- Allowed uses in the Ra4nzOand1lodging�1homeseritAllowedcuseeon
escent homes, clinics, and boarding
ewelr
the C -1 zone include neighborh000tretail businesses like y stores, and of banks, restaura
drug stores, grocery markets, meat,
similar commercial uses which cater to the local community.
Zoning
on the west side of the subject property isffor residential and
pu R-4
public use. Several parcels of multiple family zoning,
and RP1H zoning, are located here and apartment buildings have been con -
structed on each of these multiple of zoned sites. The Tukwila Cit.]
Park, which consists of. 6.5 acres public tennis courts, picnic grourn
•
•
and natural stands of tall fir trees, borders the subject property .
for over
525 feet on the latter's west side.. Also, a piece of R -1 .
'property borders the subject propertytzoneundary. Four occupies
s homes are located in this R-1 single family
The eastern side of the subject Road InterurbabyAvenue�
namely the Renton -Three Tree Poi nt
Green Beyond these roads to the River is entirely M -1, light industry. east is the Green River. Zoning on
the eastern side of the
2. Natural Conditions.
a. Geology. Geologically, the subject site iss composed
sed of
basaltic type ndtoetheeU.S yGeological Survey,
sandstone). According good seismic, foundation, and
these types. of rocks have g
slope stabilities but may become unstable when modified.
Soils. According to the 1952 King Souaty Soil
soilvey,Tthee.
soils on this site are classified a
soils have formed over shale and sandstone.and includ,
Vegetation some
glacial debris. Cathcart soils are subject to erosion, ionn,
especially when found on steep slopes. g ti
subject site helps to .stabilize the soil and mitigate. erosion.
c. To ogra hy-. Basically, the subject site iis the easternmost.
River
part of a basaltic knoll which juts generally
Lowland. The gradient of slopes on the site ranges
between 25 and 40 percent. Several areas on the site reach
over 50 percent slope, and the northeastern facing bluff is a
100 percent slope (or a 45 degree.angle)..
Q geology-
basalt, .
d. Drainage. ivaee• There are streams
naturenof the
thesubject
underlying geo g -
Because of the impermeable
basalt, shale, and sandstone— soils become readily saturated
during periods of peak rainfall and surface runoff is high.
Dense vegetation on the site serves to intercept a p
of this rainfall and mitigate surface runoff.
•
e. Vegetation: The subject site is densely wooded with a
•
rowth forest understory. Coniferous tree
typical second -g grand
species (evergreens) located on the site include g
western hemlock, and red cedar. Deciduous
fir, Douglas fir, vine maple, red alder,.
varieties include broadleaf maple ine mp includes alder,
dogwood, and willow. Understory vegetation
Oregongr.ape, salal, and numerous shrubs. •
•
f
Wildlife, Bird and animal speciess hicse use
enerallhabit
the use use bJect property are typical
in the Tukwila area. Although no field studies s have been .
done, it is such this area,for nesting
crows, quail and P weasel, raccoon,
or foraging. Small mammals like skunk,
and rabbit are assumed to use this area also.
3:
culation. Access to the subject property is possible from two
st
streets, South 153rd Street and Renton -Three Tree Po3n401-wide ROtals
called Southcenter Boulevard). South 153rd Street,
residential street, extends to within 710�0 feet mof o the subject prope
west boundary; the final 100 feet. is
properties to the fact ro
that the on.both ss of the right -of -way .
are undeveloped. The other point of access to the site is from
Southcenter Boulevard. Average daily traffic volumes on Southcenter
Boulevard, according to a TOPICS study completed in 1973, is in
excess of 11,000 vehicles.
4. Utilities. A-12" water line extends along the west side of. South-
center - .Boulevard and is sufficient to serve any proposed development
on the site. According to the Public Works Department, there is
sufficient pressure within this line to force water up the hillside •
to future buildings.
Sanitary sewer service is not available adjacent to the subject prop-
erty. The nearest line is 145 feet south of the site, and the size of
this line is only 6 -inch, which would preclude any large -scale devel-
opment from connecting to it. A larger 8 -inch sewer line is located
an additional 30 -feet south of the 6 -inch line or about 175 feet from
the subject property.
I. ENVIRONMENTAL IMPACT OF THE PROPOSED LEGISLATION:
As mentioned, the subject site has two zoning classifications: R -4 and
C -1. The C -1 or commercial zoning occupies the "lower" portion of the..
subject site while the R -4 or multiple family residential zoning occupies
the "upper" portion of the site. 'Allowed uses in the•R -4 or upper portion
of the subject site include apartments, parks, certain types of office
buildings and boarding and lodging houses. These types of uses are
characteristic of and compatible with the existing uses .found in the
upland area adjacent to the subject site.
The 'proposed rezoning would classify the "upper" portion of the subject
site as C -2, Local Retail Business. A C -2 classification allows such
uses as. auto and trailer sales, restaurants (with cocktail lounges),
drive -in restaurants, taverns, offices, gas stations,.tire stores, in
addition to those uses allowed in the C -1 zone (e.g., bakeries, banks,
barber and beauty shops, clothing, drug, and hardware stores, restaurants
with no liquor facilities, and grocery markets). Based upon the existing
land. use bordering the subject property. on the Tukwila hill, it seems that
such commercial uses as those. mentioned would be incongruous with the
nature or character of the surrounding area. In addition, access to the
upper 11 portion of the subject property would be via South 153rd Street
which has a 40 -foot right -of -way. The minimum width of streets serving
commercial areas should be 60 -foot. right -of -way, as stated in the municipal
code (17.08.010). If the "upper" portion of the subject site is developed
.commercially, it is expected that vehicular movements to and from the site
will have an adverse. effect on South 153rd Street.
The most logical ingress- egress point to the subject property from South -
center Boulevard is at the southeast corner of the site where the gradient
of the slope is least. however., the sight distance at this point is
restricted and the Public Works Department has.expresscd codcerttoeverrthe •
practicality of.ingress- egress at this point,. (SEE,
Tukwila Public Works Director, Attachment F).
�
The present
natural condition of the subject site is aaheavily. wooledthin
hillside, geologically composed of basalt and sedlm
overlying soils, which generally ranges between 25 and 40 percent slopes.
Commercial buildings i °I'service areas, would rrequireildramatic alterations to
associated parking and Because of the steepness of and
the natural condition of the property. arkin lots,
slope, cuts would have to be made for building sites, p g
access roads, effectively eliminating much of the natural vegetation which
presently serves to reduce erosion on the steep
J. ANY UNAVOIDABLE ADVERSE ENVIRONMENTAL EFFECTS: cvelo -
Approval of C -2 zoning on the subject property with subsequent d p
f a commercial establishment will result rinuc the
theremoval ofe the
habitat
greats the
greater portion of the natural vegetation an
to nil. Soil erosion on the steepo£hdevegetation andsconstruction of suli
construction phase. As a result increased storm water runoff will re
roads,.parking lots and buildings, i
An increase in auto traffic onto South l }lazardsxdue todrestrictedesightidi1
will also occur, with potential traffic right-of-way on 153rd.
tance on Southcenter Boulevard and-inadequate rig
K. ALTERNATIVES TO THE PROPOSED ACTION: to permit other.
Since the proposed action is one of retheregare the
only two property to
uses than its present zoning allows,
either grant or deny the rezone request. for the beu.
allow the subject property to be used the rezone request would
either local or regional in nature. Denying or. residential use, and th
restrict the use of the R -4 property
C-1 property to local retail business uses.
L. RELATIONSI-[IP BETWEEN LOCAL SHORT TERM ENVIRONMENTAL USES AND THE MAINTENA
AND ENHANCEMENT OF LONG TERM PRODUCTIVITY:
The steep tee hillside-on which the subject proptycistiocated is nether
a suitable nor a desireable environment or, g
significant deposits of mineral resources known to be located on the site
T }e proposed rezoning of the property, coupled with its subsequent
evelo ment, would constitute a long -term use of the land. As such, the
d p revenue for the City of Tukwila,
subject property would g enerate rand other taxing entities. Development
Central School District No. 406,
to C -2 use would allow residents of the City as well as others to obtaar
commercial services from the subject
Tukwila Planning. Department
August 22, 1975 •.
}�}1 i�i184 � 1lli�l :ii11iliig i19
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M-1
Attachment C
RANGE • FAST R.V.CE • E55
CITY OF TUKINILR
ZONING
•.
R- -1?.0
LEGEND
R—.11 RESIDENTIAL-AGRICULTURAL
R-1.7.2 1 FAMILY RESIDENCE
R.1.9.6 1 FAMILY RESIDENCE
R.1.12.0 1 FAMILY RESIDENCE
R.2.84 2 FAMILY RESIDENCE
11.3 3 FAMILY RESIDENCE
R.3.60 . 3or4 FAMILY RESIDENCE
114 LOW APARTMENTS
RMH MULT. RESIDENCE HIGH DENS.
PF PUBLIC FACILITY '
C.1 NEIGHBORHOOD RETAIL
• C.2 LOCAL RETAIL
CPR PLAWD BUS. CENTER REGIONAL
CM INDUSTRIAL PARK
61.1 LIGHT INDUSTRY
M.2 HEAVY INDUSTRY
• WI 013; 1541 77.4 100114
•
• ':47
TY OF TEND FL ANNin DEPARTMINTNAY 1915
•
OF 1‘,fl
WASHINGTON
ORDINANCE NO. L'
ATTACHMENT D
AN ORDINANCE rezoning certain property
within the City.,-of Tukwila from R -1 to
• R -4 and.0 -1.
WHEREAS, Frank and Joan Todd have petitioned to rezone
property within the City of Tukwila from R -1 to C -1, and
WHEREAS, the hearings required by law were held before
the Planning Commission and the City Council, and
WHEREAS, the Planning Commission and the City Council
recommended R -4 and C -1 zoning providing a concomitant zoning
agreement was executed to control the development of said .property
for the health, safety and welfare of the residents of the City of
Tukwila and whereas said agreement has been executed.
NOW, THEREFORE, the City Council of the City of Tukwila
do ordain as follows:
Sec. 1. The property described on Exhibit "A" is
•
hereby rezoned from land classification R -1 to R -4 and C --1 as
indicated.on the exhibit.
Sec. 2. This new zoning classification is expressly_con7.
ditioned on the full and complete performance by Todd . of the Con-
comitant Zoning Agreement.
PASSED this 7th day of September,
ATTEST:
/ c
CITY CLERK
'APPROVED AS TO FORM:
"4//x-e47,
CITY CITY. ATTORNE
PUBLISHED RECORD CHRONICLE
1971.
MAYOR
` ;; fir ' ;.•
C' • .
LJ
C7
C•Q
EXIBIT "A"
FROM R-1 to R-4 the West 125 feet of Block 2$, Interurban Addition
to Seattle
AND
FROM R-1 to C-1 Block 2$, Interurban Addition to Seattle less the
West 125 feet.
TUKWILA -TODD CONCOMITANT ZONING AGREEMENT
.THIS is a Concomitant'Zoning Agreement executed this
day 'of , • 1971, between: the City .of Tukwila, a municiI
corporation of the Third Class within the State of Washington (he
_: after called TUKWILA) and .Frank Todd and Joan Todd; His Wife, (hE
after referred to as TODD).
RECITALS:
TODD is the owner in fee simple of• property.. within the C
of Tukwila, described in Exhibit "A " attached hereto, and by thi
reference herein, and hereinafter referred to as "(
property"; and
WHEREAS, Todd has filed
a Petition to. Rezone the proper
from R1 zoning designation to.R -4 and C -1 pursuant to the provi:
of the Tukwila Municipal Code, and
The City Planning Commission pursuant to public hearing
recommended to the City Council that the . property be rezoned up
ro
the execution of a p ert use and
property d development agreement, an
WHEREAS, the Tukwila City Council, after .public hearing
recommended that the property be zoned pursuant to certain .agre
`' 1 -
relative to the property use and development of the property,
The establishment of R -1 and C -1 zoning on the property
effect the flow
sanitary drainage, and other utilities within the area and cer
conditions are required to co:ttrol the development of said pro;
of traffic. in
the vicinity; effect the storm di
•
for the health,
-Tukwila,
safety and welfare of the residents of the City of
NOW, THEREFORE, in the event the City Council of the City of
'Tukwila reclassifies the property from R -1 to R -4 and C -1 as indicate
on the attached map marked Exhibit "B" and incorporated herein by re
-erence, and in consideration of the City-Council changing the classi•
ficatior_•of the property to R -4 and C -1 and for so long as the prop-
erty renains'so classified, TODD hereby covenants'and agrees to the
.following covenants and conditions on behalf'of themselves:and their
successors and assigns:
1 1.—That 67th Avenue South shall be improved to minimum City
1,
`� ./Standards • and there shall be a suitable public turn around near the
1 y
• t., -2 ` i� � corner of 67th Avenue South and South 153rd. The standards . shall .
=rI V
N V be set forth in writing and attached to this agreement. The ques-
tion of the suitability of the public turn around shall be in the
discretion-of the City. Supervisor in consultation'with_ the Fire and
Police Denart_ment .t- '1 r4init 7,t C;; 1- t'�i` f� { , (�' i c
'J ..
2. That sufficient service be provided for fire protection
with hydrants installed with mains as required by City Standards
which shall be located in an easement with loop connecting t he prop-
erty from Southcenter Boulevard to South 153rd. This service shall
be in writing and in the discretion of the Fire Chief, G i`. 5 71 /c7& 7
P/2-0,116 i
3. That adequate storm drains be designed to meet the. •
.specific approval of the City of Tukwila Building and Street Depart -
r; nts �:,�,�
S_>"
e:7: G'i e 'f:: 74/^:(;) f' F'G -`t- i it L
. 1.
4. That a decorative fence be erected at the South end
of the C -1 and B. -4 zoning to' prevent access from existing public
-t the park
--street-and that there be a landscape o
�,ne strip adjacent �
- =-;2
.
5. That the. building whiclii i erected . near the.South
b Y
oundar shall be located at least:40'feet North of the South
•
'boundary.
All aspects of signing, including construction, .
materia ,
is lig hting, size and location. relative to this devel-
,
opment shall be -and require the approval in the sole.discretiol
'of . the Planning Commission.
7. That the plans for development including all con-
ditions required herein relative to construction shall be appr
:bx the Planning Commission prior to issuance of a `Building Per
mit; the- landscaping and signing details shall also be include
in the design drawing submitted for review.:
All design and construction shall be.without cost
the City.
That TODD shall design, construct and pay for the
sanitary sewer facilities `which will be required in accordanc
with the applicable ordinances of the City of Tukwila.
7 9. No excavation shall occur without the applicant, .
securing an Excavation i'ermit pursuant to the Ordinances of t
City of Tukwila/ fir
he r lie qfr
•
10. No construction shall be commenced before the City has
notified TODD in writing that the plans and specifications have
approved by.the.Planning Commission and the City SuperintendE
• The City shall have the right to inspect said facilit:
and no facility shall be covered up prior to inspection. TODD ag:
to comply with all of the City's reasonable inspection reaui-renen
'11. Upon completion of construction and upon certificatio
Y the City Engineer, that said facilities meet the'standards o
from t City .
he Cit of .Tukwila, TODD shall assign and convey all public fac-
ilities,.together with any necessary easements, to the City for
ance b the City. Said easemes 'shall 'be for general util
:ac• cept Y City.,
• t.; f. j. -.`7 M.> f vLi'/ l %�,e!,
r oses:'%i%Said easement shall be escrowekl: in advance of the.
phi P
-Building Permit being issued.
* 12-. The ling County. Cause No. 695378 shall be dismissed
with prejudice.
13. TODD agrees to indemnify and hold the City harmless
from any and all claims which may be asserted against. the City a
a result of the construction, or maintenance of said facilities
prior to acceptance by the City..
1.4. TODD agrees in carrying out the terms of this • g p para-
ra h, TODD shall'be acting as an independent contractor and in
no respect shall be deemed an agent of the City.
15. That partial waiver or waiver by acquiescence . by
• the
e Ci t• of any provisions or conditions of this agreement shal
of this
h, provisions or conditions .o
not be a waiver of any other p
Agz:ecmnt.
'16. When notified to make change `r corrections c •yam`.
�L�e^rc -4; � � TODD ogre
any facility described herein7by the•City Supervisory
' - providing they are in C,ccc
to make such changes or corrections _^
Agreement, withine ;` time • sE.; = f ah —ice- .aicl 4 I�o
ance with. this Ag , --
the event of failure to make' said changes or corrections all
-nL �L i yif s,.tit ��'
�
rights of Todd '—a =ag reerient shall—tez� nab -a-nEr a Stop
. 461..1tic? -;k:
Work. Order issued by the City qrr= a phase . .
•'ies
• agreement shall be recorded in the Records•c
�, ?. This. 2. - - -• - � -.
unt Auditor
and the covenants, duties and obligati
the King Co y •.. - • . - -
of TODD under this Agreement shall Constitute an easement and
and a covenant attached hereto and running with -the
Stud e
property and shall be binding upon TODD and their' su,
ugon ..the. pr o P y • -CetA. 0-41 � =
cessors and assi ns, All Building,. Occupancy and Use Permits
app lied: for or issued shall be subject to the terms, cc
- - -
after
tionS and limitations of this agreement.
l
g , • Amendments to this Agreement• may -be made --only. ai
approval by the City Council of the City of Tukwila:
19. This agreement
•
is
f Inc .L-1.
. and C �i a b ,,• mz l;
institute and
in equity to e r.fcrce the
specifically enforceable -by- Al
proceeding at 1.
•
prosecute any
provisions of this agreement-. .=y
' expended 'b�'= f�for
to pay reasonable. Attorney fees x
forCement proceedirigs� �'
applicable zoning, buildi *ng,-
2b . . ]111. provisions of �•PL
City of Tukwila shall control this i
• other Ordinances .of the City - ...
except as modified herein.
--5-
•
21.. It is further expressly agreed by TODD that in the .
event any covenant or condition or restriction he%eiriabove con-
tained or any portion thereof is invalid or void, such invalidity
or voidness shall in no way affect any other covenant, condition -
or-restriction hereinabove contained.
' IN WITNESS WHEREOF, this Agreernent is executed this
,..1971, at Tukwila; Washington.
Frank Todd
• Joan Todd
CITY OF TUKWILA
BY
• Mayor
Clerk
li.-11,.:'
1-3 1I =i ��I\
ATTACHMENT E
COMPREHENSIVE LAND USE PLAN
CITY OF
LEGEND
INDUSTRIAL
RETAIL SALES
MULTIPLE FAMILY
Fn SINGLE FAMILY
PUBLIC
PASSED BY ORDINANCE 484
15 MAY 1967
PURL. W KS DEPAPTN. •T -4
623C3 c=rautllice.inter Eaciulavarlir
Tukwila Was3-a1 a t f SE31 :367
t p1Dn C 2 3 242 — 2177
July 31, 1975
ATTACHMENT F
MEMORANDUM
TO: Kjell Stoknes, Planning Director
1 FROM: Steve Hall, Public Works Director
■ SUBJECT: Proposed Restaurant, Southcenter Blvd. at Interurban Ave.
Bob Oldright
As per our discussions, I have several grave questions and concerns
EL as to the proposed access as indicated on the preliminary site plan
iE for this project.
The first and major one is the sight distance as dictated . by normal
highway design. In the case of this proposed project, minimum sight
distance would be considered two hundred and fifty feet (250'). I
am enclosing a-page from the AASHO Manual and the accompanying .
calculations for 35 miles per hour on wet pavement.
H] Secondarily, with-the anticipated future widening of Southcenter
¢- Boulevard, it would be a requirement of this Department that the
access road from Southcenter Boulevard as proposed to this site be
at road elevation at the property line. This would simplify future.
. widening of the road, and not cause a problem in the future with a
possible discrepancy in grades at that point.
El Also, as per Tukwila Municipal Code, maximum grade allowed is 15 %.
CO
Steven M. Hall,
Enclosures: AASHO.Design
Site Location, Photographs
Proposed Access
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136 AASHO— GEOLIC HIGHWAY DESIGN
Braking Distance
The approximate braking distance of a vehicle on level roadway may be
determined by the use of the standard formula:
Vz
d=
30 f
Where d= braking distance, feet
V— initial speed, .mph
f= coefficient of friction between tires and roadway
In this formula for braking distance the f factor is used as an overall
or a single value that is representative for the whole of the speed change.
Measurements show that f is not the same for all speeds. It decreases h physical
l
elements such as air pressure of tires, type
type and condition of the pavement surface, the presence of moisture,
mud, snow or ice, etc. Further, and of greater significance, in stops from
high speeds the actual braking distance is dependent upon the vehicle
braking system rather than the skidding of tire on pavement. In stops from
Design
speed
mph
30
40
50
60
65
70
TABLE I1I -1
MINIMUM STOPPING SIGHT DISTANCE
Perception and
brake reaction
Time Distance
Coefficient
of
friction
Braking
distance
on level
Stopping sight distance
Rounded
Computed for design
sec. feet f feet feet
Design Criteria —WET PAVEMENTS
2.5 103 .36 73 176
2.5 132 .33 131 263
75*
80*
.31 208 369
.30 300
.30 336 538
.29 387 600
.28 443 667
.27 506 741
30
40
50
60
65
70
75
80
Comparative Values —DRY PAVEMENTS
30 2.5 110 .62 48 .156
40 2.5 147. .60 89
50 25 183 .58 144 327
60 2.5 220 .56 214 _ 434
200
275
350 •
475
550
600
675
750
65 2.5
70 2.5
75 2.5
80 2.5
238 .56 251 554
257 .55 297
275 347 • 622
293 .53 403. 696
* Desiof seeds of 75 ands 80 mph control in applanned o y tofhigh nays with full con-
tr
(ALS.. (2. 5
117 ET
2_
,7, /),
.00 CJ. 35).
f %r -.r-
/) ,