23-212.00LibertyLakeLLCCountryVistaMitigationAgreement •
VOLUNTARY MITIGATION AGREEMENT FOR COUNTRY VISTA
TRAFFIC MITIGATION
Liberty Lake,LLC
This Voluntary Mitigation Agreement("Agreement")is entered into between Liberty Lake,LLC,
its successors and assigns("Developer"),a Washington limited liability company, having offices at 1620
North Mamer Road,Building C-400,Spokane Valley,WA 99216,and the City of Spokane Valley("City"),
a municipal corporation of the State of Washington,hereinafter jointly referred to as"Parties":
RECITALS
WHEREAS,this Agreement is entered into by the Parties pursuant to RCW 82.02.020,to provide
a voluntary financial contribution toward the Barker Rd. Improvements —Appleway to 1-90 project to
mitigate increased traffic volumes expected to be generated by a portion of the overall development as
proposed in the Developer's permit application LUA-2022-0028 ("Application") in the City of Liberty
Lake and preliminary binding site plan for Centennial Country Vista Drive(the"BSP").
WHEREAS, Developer is the owner and/or developer of certain real property generally located
within an area north and south of Country Vista Drive and west of Henry Lane,identified as parcel numbers
55163.0901,55163.0902,55163.0903,55163.0904,55163.9214 in the City of Liberty Lake,and otherwise
identified as Lots 11 through 16 in the BSP consisting of approximately 45.23 acres of land (the
"Developer's Portion"), upon which Developer intends to develop and construct up to 1,176 residential
multi-family dwelling units("Developer's Intended Project").
WHEREAS, Centennial Properties, Inc. ("Centennial") is the owner and/or developer of all real
property contemplated in the Application other than the Developer's Portion("Centennial's Portion"),such
that the Developer's Portion and Centennial's Portion together comprise the"Development".
WHEREAS,the Developer has requested final approval of the BSP,which the City anticipates will
increase traffic congestion and directly impact existing transportation infrastructure at the intersection of
Appleway Ave.and Barker Rd. located within the City.
WHEREAS, the City of Liberty Lake issued a Mitigated Determination of Non-Significance
("MDNS")as part of the approval process pursuant to the Development's State Environmental Policy Act
("SEPA")review,which MDNS requires the Developer to enter into a traffic impact mitigation agreement
as a condition to granting final approval of the BSP.
WHEREAS,the Trip Generation and Distribution Letter for the Development, dated September
23, 2022,states the Development is expected to generate 1,665 new trips during the AM peak hour and
1,647 new trips during the PM peak hour for the roadway network upon full build out. Of the 1,647 new
PM peak hour trips, 957 are expected to be introduced into the City's traffic system, causing a need for
additional improvements at the intersection of Appleway Avenue and Barker Road,the Barker Road and I-
90 interchange,and intersections along the South Barker Road Corridor(the"Improvements").
WHEREAS, through further analysis, dated June 28,2023,the City determined that the planned
improvements to the South Barker Corridor from the Eastbound 1-90 on-ramp to Appleway Avenue will
only accommodate 1,400 of the expected 1,647(approximately 85%)new PM peak hour trips entering the
South Barker Corridor due to the Development.
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61285.0001.15977323.1
WHEREAS,of the 1,400 new trips accommodated by the Improvements, 507 have been allocated
to the Developer's Portion,with 893 allocated to Centennial's Portion.
WHEREAS, the City and Developer have agreed to a voluntary mitigation per trip fee to be paid
in connection with Developer's share of the new PM peak hour trips.
WHEREAS, a full traffic impact analysis will need to be performed prior to approval of the 508'r'
trip resulting from development of the Developer's Portion as a means to identify an appropriate per trip
mitigation fee for any trips over 507.
WHEREAS,pursuant to RCW 82.02.020,the City has the authority to allow a payment to mitigate
a direct impact that has been identified as a consequence of a proposed development. The Parties have
identified (I) transportation impacts that will be caused by the development of Developer's Portion; and
(2)a reasonable relationship between said impacts to the City's transportation system and the Developer's
financial contribution toward those impacts.
WHEREAS,the City and City of Liberty Lake are parties to an interlocal agreement wherein each
agree to give full faith and credit to the traffic mitigation measures imposed by the other city on
development that has a demonstrable impact on the traffic facilities of the city imposing the mitigation
measures.
WHEREAS,to mitigate the direct impacts of the Development upon transportation facilities,the
Parties are voluntarily entering into this Agreement pursuant to RCW 82.02.020. I,
AGREMENT
NOW,THEREFORE,in consideration of the mutual covenants and conditions contained herein,
the Developer and the City agree as follows:
1. Voluntary Agreement.This is a voluntary agreement pursuant to RCW 82.02.020. The
Parties agree and acknowledge that the(a)mitigation payment identified in paragraph 3 of this Agreement,
and (b) procedures identified herein to determine further mitigation measures are freely and voluntarily
agreed to as a contribution proportional to and reasonably necessary to mitigate the direct traffic impacts
created by the Development. The Parties further stipulate and agree that all Washington state law
requirements for creation of a valid development impact mitigation agreement have been met, including
but not limited to RCW 82.02.020 and case law interpreting the same, and that neither the Developer nor
the City will claim otherwise.The Parties agree that the calculations of the mitigation fees identified herein
are unique to this Agreement and may not be used as a basis for the negotiation with Developer of any
future traffic mitigation agreements.
2. Projects.The Parties agree that the mitigation payment shall be expended by the City on
design, right-of-way acquisition, and/or construction of the Improvements. The City may allocate all or
any part of the mitigation payment to any component of Improvements as determined appropriate by the
City in its reasonable discretion.
3. Primary Mitigation Fee. The Primary Mitigation Fee ("PMF") only mitigates the first
507 new peak hour trips resulting from the development of Developer's Portion. Said fee is based on
calculations provided by the City in the technical memorandum dated June 28, 2023, entitled
Barker/Appleway Raffia Assessment of the Country Vista Binding Site Plan(attached hereto as Exhibit A).
The Developer agrees to pay a PMF ofNine Hundred Twenty Two Dollars and Forty Seven Cents($922.47)
per trip for each of the first 507 new PM peak hour trips,to mitigate the traffic impacts resulting directly
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61285.0001.15977323.1
from the development of Developer's Portion. The City agrees that Developer's Intended Project, once
constructed, is not anticipated to exceed 507 new peak hour trips.The City shall therefore only be entitled
to charge and collect the PMF from Developer, and not the SMF identified in section 5 below, so long as
actual development on Developer's Portion (not including infrastructure improvements) is limited to
residential multi-family structures which,in total,do not contain more than 1,176 dwelling units.
4. Payment of the Primary Mitigation Fee. The total PMF shall be distributed based on the
building permits issued for construction within Developer's Portion.When the Developer(which includes
its successors in interest, assigns, and grantees)applies for a building permit within Developer's Portion,
they shall pay$922.47 per new PM peak hour trip that will be generated from the use for which a building
permit is sought. Alternatively, a PMF of$397.70 for each multifamily residential unit may be assessed
based on the building permit application up to the 1,176 maximum dwelling units covered by the PMF.The
Developer(which includes Developer's successors in interest, assigns, and grantees per Section 9 of this
Agreement)shall pay the PMF for each new trip before the building permit is issued.No building permit
will be issued unless and until the associated PMF is paid in accordance with this Agreement.At any time,
the Developer may pre-pay as many new PMF trips as it may deem appropriate, provided the Developer
identifies in writing the specific lot(s)to which the pre-payments)apply.
5. Supplemental Mitigation Fee.The Supplemental Mitigation Fee("SMF")mitigates the
traffic impacts resulting from any new trips in excess of 507 that are generated from the development of
Developer's Portion. The SMF, on a per trip basis, must be determined and paid prior to any building
permit being issued for a parcel within Developer's Portion if approval of the application would result in
more than 507 trips generated by the development.The provisions in this section(section 5)do not apply
to Developer so long as actual development of Developer's Portion is limited to infrastructure
improvements and residential multi-family structures which, in total, do not contain more than 1,176
dwelling units.
To determine the appropriate per trip SMF for the Development,the Developer and Centennial
shall each pay a pro-rata portion(based on total costs and contributions from other parties responsible for
mitigation costs resulting from the Development) and arrange for a full traffic impact analysis ("TIA").
Upon receipt of the TIA,the City,Developer, and Centennial will agree,in good faith,on:(I) the cost to
acquire additional right-of-way and design and construct the right-of-way improvements necessitated by
the Development's traffic impact remaining unmitigated under this Agreement and the corresponding
agreement between the City and Centennial to mitigate impacts from Centennial's Portion; and (2) the ;.
corresponding per trip SMF.If the City,Developer,and Centennial cannot agree on the cost of such required
mitigation and improvement costs after mediation,then the matter shall be submitted to binding arbitration
under the Washington Arbitration Act.
6. Payment of Supplemental Mitigation Fee. The SMF shall be distributed based on the
Qualifying Building Permits applied for and/or issued for parcels within the Developer's Portion of the
Development. "Qualifying Building Permits" are those building permits sought for construction within
Developer's Portion when, at the time of application, the total building permits that have already been i
issued or applied for within Developer's Portion are expected to generate at least 507 PM peak trips total.
The provisions in this section (section 6) do not apply to Developer so long as actual development of
Developer's Portion is limited to infrastructure improvements and residential multi-family structures which,
in total,do not contain more than 1,176 dwelling units.
The applicant for each Qualifying BuildingPermit shall payaper tripSMF based on the number
PP Q fY� g
of trips that will be generated from the use for which a building permit is sought.The Developer shall pay
the SMF before the Qualifying Building Permit is issued. The Developer may at any time pre-pay as many
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6I285.0001.15977323.1
new SMF trips as it may deem appropriate, provided (1)the SMF has been determined by agreement or
arbitration;and(2)Developer identifies in writing the specific lot(s)to which the pre-payment(s)apply.
When the issuance of a building permit will create trips both within and above the 507 trips covered
by the total PMF,taking into consideration the cumulative trips that will be generated by uses for which
building permits have already been issued and/or applied for,then the Developer must pay(a)the per-trip
PMF for those trips causing the total Developer's Portion generated trips to equal 507;and(b)the per-trip
SMF for the balance of trips expected to be generated by the use for which the building permit is sought.
7. Compliance with RCW 82.02.020. Payments collected by the City shall be held in a
mitigation fee reserve account and may only be expended towards the design, right-of-way acquisition,
construction, and other related components of the projects identified in section 2 of this Agreement. The
City shall be entitled to reimbursement from the mitigation fee reserve account for any funds it may expend
for the design,right-of-way and construction prior to the collection of the fees.The mitigation fee payment
shall be expended by the City within five years from the date of payment by the Developer. Pursuant to
RCW 82.02.020,any funds in the mitigation fee reserve account not expended within the five-year period
identified above shall be refunded by the City to the Developer with interest; however, if the payment is
not expended within five years due to delay attributable to the Developer, the payment shall be refunded
without interest.
8. Notice. All communications, notices or demands of any kind which a party under this
Agreement is required or desires to give to any other party shall be in writing and be either:
(a)Delivered personally;or
(b)Deposited in the U.S.mail,certified mail postage prepaid,return receipt requested and
addressed as follows:
If to the City: City of Spokane Valley
10210 East Sprague Avenue
Spokane Valley,WA 99206
Attn: City Manager
If to the Developer: Liberty Lake,LLC
c/o Gemstar Management,Inc.
Attn:Thomas E.Clemson
1620 North Mamer Road,Building C-400
Spokane Valley,WA 99216
9. Covenant Running with the Land; Successors.This Agreement and its terms shall be
covenants running with the land. This Agreement shall be binding on and inure to the benefit of the
successors and the assigns of the Developer, including all subsequent purchasers.This Agreement or other
documentation which identifies the obligations herein shall be recorded with, and in a format accepted by,
the Spokane County Auditor's Office against the title of all parcels/lots within the Development and shall
be noted on the binding site plan and any recorded plat.
10. Governing Law. This Agreement shall be construed in accordance with the laws of the
State of Washington. Venue shall be in Spokane County, State of Washington. Except as provided in
Section 5,all disputes arising under or related to this Agreement that cannot be resolved through informal
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61285.0001.15977323.1
discussion and negotiations shall be resolved by litigation filed in the Superior Court of the State of
Washington for Spokane County,unless otherwise required by applicable federal or state law.
11, Modifications,No modification or amendment of this Agreement shall be valid unless the
same is reduced to writing and executed with the same formalities as the present Agreement.
12. Waiver. No officer, employee, agent or otherwise of the City has the power, right or
authority to waive any of the conditions or provisions to this Agreement.No waiver or any breach of this
Agreement shall be held to be a waiver of any other or subsequent breach.
13. Entire Agreement. This Agreement forms a fully integrated agreement between the
Parties.No other understandings,oral or otherwise,regarding the subject matter of this Agreement shall be
deemed to exist or to bind any of the Parties hereto. All Parties have read and understand all of the
Agreement,and now state that no representation,promise or agreement not expressed in the Agreement has
been made to induce any Party to execute the same. The Parties have each had the opportunity to be fully
advised by their legal counsel and any other advisors with respect hereto. Each party is executing this
Agreement after sufficient review and understanding of its contents,
14. Authority. Both Parties to this Agreement represent and certify that they have full
authority and power to enter into and carry out this Agreement. The persons signing this Agreement
represent that they have authority to act for and bind their respective principals,
15. No Third Party Beneficiary. This Agreement is made and entered into for the sole
protection and benefit of the Parties hereto and their successors and assigns. In the event of any action or
suit brought against the City disputing the enforceability of this Agreement or any term herein, then the
Developer agrees to actively cooperate with the City in its defense of this Agreement.
16. Severability. The provisions of this Agreement are separate and severable. The invalidity
of any clause,sentence, paragraph, subdivision,section, or portion of this Agreement shall not affect the
validity of the remainder of this Agreement or the validity of its application to other persons or
circumstance.
17. Condition Precedent.The terms of this Agreement shall be effective only if and when(a)
Centennial and the City fully execute a similar agreement mitigating the impacts from development of
Centennial's Portion;and(b)this Agreement is fully executed by Developer and the City,The condition of
the MDNS requiring this Agreement to be in place before final approval of the BSP shall not be satisfied
unless and until both Developer and Centennial have each executed a traffic impact mitigation agreement
for the Development.
18. Attorneys' Fees. In the event that either Party initiates any action to enforce the terms of
this Agreement,the substantially prevailing party,including on appeal,shall be entitled to reasonable costs
and attorneys'fees and expert witness fees incurred therein.
IN WITNESS WHEREOF, the parties have executed this Voluntary Mitigation Agreement for
Country Vista Traffic Mitigation on the date written below.
[Signatures on Following Page]
}
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61285.0001.15977323,1
•
CITY OF SPOKA.NE VALLEY:
1��� /i-i3-2 3
Jo n Hohman City Manager Date
g
ATTES :
k' 1601 0 I (3 • 2-3
Moroi Pat rson,City Cleric Date
APP OVEl/DJ.S TO FORM:
//'f•f_l
/1— --23
O e of the ' rty Attorney Date
DEVELOPER:
LIBERTY LAKE,LLC,
a Washington limited liability company
e ame:Thomas E.Clemson
Its: Manager
STATE OF WASHINGTON ) t
. )ss.
County of Spokane )
On this 1p day of N 6v r n l b.er 2023 before me,the undersigned, a Notaiy Public !
in and for the State of Washington,duly commissioned and sworn, personally appeared Thomas E.Clemson
tome known to be the Manager of Liberty Lake,LLC,the limited liability company that executed the foregoing
instrument,and acknowledged the instrument to be the free and voluntary act and deed of the limited liability
company,for the uses and purposes therein mentioned,and on oath stated that he is authorized to execute the
instrument.
WITNESS my hand and official seal hereto affixed the day and year in this certificate above written.
\ `C\'1 C.CL � t tk OA ). �C 9 d A A.
MALINDA G ELDRIDGE NOTARY PUBLIC,in and for the State of�47ashington,
y�
NOTARY PUBLIC residing at \\x-4 us) E 1
STATE OF WASHINGTON My commission expires: IT•1 q 2 t c
License Number 22036079
My Commission Expires 12119/2926 /`"ICi t i ry t= [rl I,i CIf`�
Printed Name J
Page 6 of 7
61285.0001,15977323,1
STATE OF WASHINGTON )
)as.
County of Spokane )
On this 1314,day of Ak Ye` i 2023 before me,the undersigned,a Notary Public
in and for the State of Washington,duly commissioned and sworn,personally appeared John Hohman to me
known to be the City Manager of the City of Spokane Valley, the municipal corporation that executed the
foregoing instrument, and acknowledged the instrument to be the free and voluntary act and deed of the
municipality,for the uses and purposes therein mentioned,and on oath stated that he is authorized to execute
the instrument.
WITNESS my hand and official seal hereto affx: ►the day and year in tit' certificate above written.
4111
NN"� �""ilt' N•TARY PU Lid<
n and forrthe State of Washington,
*%( BU{4 h/ residing at ( Ic! �y
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Page 7 of 7
61285.0001.I5977323.1
Exhibit A
o�S.*ANf`9 Community& Public Works Department
Spokane 2tJ :a
? 10210 E Sprague Avenue ♦ Spokane Valley WA 99206
�,,•'�Valley® "`""`$ Phone: (509)720-5000 ♦ Fax: (509) 720-5075 •
003-20 3
www.spokanevalley.org
Memorandum
Date: June 28, 2023
To: File
From: Jerremy Clark, PE, PTOE—Traffic Engineering Manager
Re: Barker/Appleway Traffic Assessment of the Country Vista Binding Site Plan
Introduction
This memorandum summarizes an evaluation completed to assess the impact of traffic related
to the Country Vista Binding Site Plan (BSP) to the intersection of Barker Road and Appleway
Avenue. The proposed development project is located east of Henry Lane, north and south of
East Country Vista Drive, in the City of Liberty Lake. The BSP assumes 1,176 apartment units,
1,092,485 square feet of commercial use, and one convenience store/gas station according to
the trip distribution and generation letter(TGDL) included with the SEPA notice of application
(NOA) circulated on September 27, 2022. As noted in the TGDL, the development is expected
to generate 1,665 trips during the AM peak hour and 1,647 trips during the PM peak hour. Of
these trips, 957 trips are estimated to go into the City of Spokane Valley and through the
intersection of Appleway Avenue and Barker Road during the PM peak hour. Likewise, 1,011
trips are expected to go through that same intersection during the AM peak hour(see Figure 5
of the TGDL).
A previous analysis was completed to identify the need for mitigation at the Appleway/Barker
intersection. This evaluation was completed to quantify the proportionate-share contribution
toward the mitigation identified in the City's 6-year Transportation Improvement Program (TIP).
This memo includes the following sections:
• Mitigated Capacity
• Proportionate-Share Calculation
• Summary
Mitigated Capacity
The Appleway/Barker intersection has been shown to deteriorate below acceptable levels of
service prior to the inclusion of the Country Vista BSP trips.There is a planned improvement
along the Barker Corridor that improves the operations at this intersection. Channelization and
signalization improvements at the Barker/Appleway intersection are included in the City's
Transportation Improvement Program (TIP) Project#41, which includes a widening of the 0.29-
mile section of Barker Rd from Appleway Ave to the 1-90 interchange. The southern portion of
this improvement was evaluated with the additional volumes from vested trips and the Country
Vista BSP. Traffic from the Country Vista BSP causes the Appleway Avenue and Barker Road
Intersection to fail, even after accounting for improvements. As a result, an analysis was
completed to determine how much of the BSP trip generation could be accommodated by the
City's TIP project. This was completed through an iterative series of evaluations at various
Exhibit A
Barker/Appleway Traffic Assessment of the Country Vista BSP June 27, 2023
Page 2 of 3
levels of completion. As summarized in Table 1, below, the proposed TIP project at
Appleway/Barker can accommodate approximately 85% of the Country Vista BSP trips that are
distributed through the intersection. This equates to 814 out of 957 trips expected to travel
through the intersection.
The analysis was based on a 120 second cycle length for the traffic signal to maintain
consistency. The signal timing for the 85% volume scenario was adjusted to 110s to
accommodate all phases with an acceptable level of service. As shown in the last row of the
table, the expected delay with 85% of development is 54.4 seconds per vehicle during the PM
peak hour. The threshold for the maximum delay for an acceptable level of service is 55
seconds.
Table 1. Appleway/Barker Development Volumes to Failure
2023 Baseline CVBSP
volumes Tri s 100% 95% 90% 85% 80% 75% 70% 65% 60%
N BL 51 51 51 51 51 51 51
NBT 320 320 320 320 320 320 320
NBR 151 34 180 178 177 175 173 171
SBL 307 159 442 434 426 418 410 402
SBT 432 432 432 432 432 432 432
SBR 158 158 158 158 158 158 158
EBL 155 155 155 155 155 155 155
EBT 619 172 765 r 757 r 748 r 739 r 731 r 722
EBR 46 46 46 46 46 46 46
W BL 193 113 289 283 278 272 266 261
W BT 632 342 923 906 889 871 854 837
WBR 156 138 273 266 260 253 246 239
Total Intersection 3220 4034 3986 3939 3891 3843 3795
Volumes
Added Trips 814 766 719 671 623 575
Seconds of delay
53.9
@ 120s cycle
I
Near threshold at 120s cycle,update to 110s cycle and within LOS
Threshold;delay =54.4
Proportionate Share Calculation
Given the established requirement for mitigation, the proportionate share of the mitigation cost
was determined for the proposed BSP. In addition to the deficiencies at Appleway and Barker,
a separate analysis completed by the developer's consultant identified deficiencies at the 1-90
EB Ramp and Barker. The improvements at the 1-90 ramp were shown to be mitigated by the
addition of a northbound right turn lane onto the eastbound entrance ramp. This improvement
would tie in to the City's TIP project for a 5-lane Barker between 1-90 and Appleway, but was not
included in the original project scope. As a result, the project cost estimate was updated to
include the ramp intersection improvements and reflect current construction and right-of-way
pricing. In project cost estimate was further refined to only include those components necessary
for mitigation of the BSP, as described below.
Exhibit A
Barker/Appleway Traffic Assessment of the Country Vista BSP June 27, 2023
Page 3 of 3
Project Cost
The total cost of the City's TIP project was revised to account for current construction and right-
of-way pricing and to incorporate refinements into the planning-level design. Excluding the
proposed roundabout to be built at the Broadway/Barker intersection, the updated cost of the
Barker: Appleway to 1-90 project is expected to exceed $11.5M.
As analyzed, the Country Vista BSP will contribute to deficiencies at the 1-90 EB ramp and the
Appleway intersection. In order to provide mitigation specific to the development, the project
was broken down into two components:
• Improvements at the 1-90 EB ramp intersection with Barker,to include improvements 320' south
on Barker. This is approximately the area between the west leg of Broadway Avenue and the I-
90 EB ramp. Based on analyses completed by the developer's consultant,the queues on the
northbound approach with the proposed northbound right turn lane are expected to reach 319'.
By extending the capacity for the right turn lane at the ramp intersection,this should maintain
access to the right turn lane.
• Improvements at the Appleway intersection with Barker,to include improvements 500' north of
Appleway. At 85% buildout of the Country Vista BSP,the average queues for the southbound
left turn lane during the PM peak hour are estimated at 488'. As a result, a length of 500'for
improvements is required to accommodate the required storage and minimize spillback.
Given these two elements of the overall project, the cost estimate was revised to exclude the
"middle" portion of Barker Road. The resultant cost estimate mitigable by the BSP is $9.5
million, which includes a substantial right-of-way component.
Cost Participation
Based on a known volume that can be accommodated by the intersection, a proportionate share
calculation was completed in a similar manner as accepted in the Neighborly Ventures
determination and mitigation. The process is described below:
• The total existing volume of the two intersections, including all vested projects but
excluding the proposed BSP was determined, as listed below:
O 1-90 EB at Barker : 2,151
o Appleway at Barker: 3,220
• The additional volumes contributed by the development were determined for the two
intersections, which vary between 85% build at Appleway/Barker and 100% build at 1-90
EB/Barker.
O 1-90 EB at Barker(100%) : 297
o Appleway at Barker(85%) : 814
• The proportionate share of the BSP project toward the intersection volumes was
calculated for each intersection, as described below:
O 1-90 EB at Barker : (297/2,151) = 13.81%
o Appleway at Barker : (814 /3,220) = 25.28%
• The total volume of the two intersections including the BSP project were determined, as
listed below:
O 1-90 EB at Barker : (2,151+297) = 2,448
o Appleway at Barker : (3,220+814) =4,034
Exhibit A
Barker/Appleway Traffic Assessment of the Country Vista BSP June 27, 2023
Page 4 of 3
• The weighted average of the two separate proportionate shares were determined to
identify the proportionate share of the overall project cost estimate, as summarized
below. This was determined by multiplying the cost participation of each intersection by
the total volume of each intersection including the project, adding the values together,
and dividing by the total volume of both intersections.
0 (2,448 x 13.81%)+(4,034 x25.28%) _ 20.950
(2,448+4,034)
• The proportionate share of this project toward the reduced portions of the Barker: 1-90 to
Appleway improvements is estimated at$1,989,963.51 (20.95% of$9,500,000)
• The total allowable trips for the development permitted within this mitigation are 1,400
(85% of 1647).
• Given a potential mitigation strategy of delegating costs to each component of the
development, the cost per trip was calculated based on a development total of 1,400
trips, as summarized below:
$1,989,963.51
o 1,400 trips — $1,421.40 per trip
Summary
This document summarizes an evaluation completed to estimate the impact of trips generated
by the Country Vista BSP in the City of Liberty Lake added to the Spokane Valley intersections
of the 190 EB ramp at Barker Road and Appleway Avenue at Barker Road. As documented by a
prior analysis, the addition of project trips to the Appleway/Barker intersection is expected to
contribute to an already deficient level of service during the PM peak hour. As documented by a
separate analysis by the developer's consultant, the addition of project trips to the 1-90 EB
ramp/Barker intersection is expected to cause a deficient level of service. There is a planned
project along the Barker Corridor between 1-90 and Appleway Avenue that will improve
operations in this area. This project was modified to include a northbound right turn slip lane at
the 1-90 EB ramp intersection. The northern and southern portions of the Barker corridor project
were assessed as mitigation for the deficient levels of service attributed to the project. The
planned project was shown to accommodate up to 85% of the additional trips generated by the
development through the Appleway/Barker intersection and 100% of the additional trips through
the 1-90 EB ramp/Barker intersection. The additional project trips through these intersections
constitute a 20.95% contribution to the mitigable portions of the corridor project. As determined
through a proportionate share calculation and presented herein, the project mitigation of the
Country Vista BSP is estimated at$1,989,963.51, or$1,421.40 per trip.
Exhibit A