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TIACity of Yelm Public Safefiy Building Traffic Impact Analysis Prepared For: City of Yelm P Q Box 479 Yel m, WA 98597 ` y~ ~} 3~ ~`~ .. ~E City of Yelm Public Safety Building Traffic Impact Analysis Prepared for City of Yelm c/o ]ames Gibson, P.E. Development Services Engineer City of Yelm P O Box 479 Yelm, WA 98597 Prepared by Shea & Carr, Inc, 2424 Heritage Court SW Olympia, WA 98502 360.352.1465 www.sheacarr.com CERTIFICATION The technical material and data contained in this document were prepared under the supervision and direction of the undersigned, whose seal, as a professional engineer licensed to practice as such, is affixed below. Prepared by Can ace Cramer, Planner ~:~ ~~ ,~ Chec y George S ith, Transportation Planner Approved Perry A. Shea, P.E. F' ryr . i •r TABLE OF CONTENTS 1. INTRODUCTION ........................................................................... ~. 1,1 Project Overview ........................................................................ ..1 1.2 Study Cantext ............................................................................ .. 1 2, PRO]ECT DESCRIPTION........s•s.•s•s ................••.....i............R,........ • 3 2.1 Development Proposal ...................................................... ........... ..3 3. BACKGROUND INFORMATION •..i.•.i .............•...,...e...eyy.Y,......s.....e • Jr 3.1 Area Land Uses ........................................................................... ..5 3.2 Roadway Inventory ..................................................................... ..5 3.2.1 SE McKenzie Avenue ............................................................. ..5 3,2.2 SE Washington Avenue .......................................................... ..5 3,2.3 2'~~ Street SE ........................................................................ ..5 3.2.4 3r~ Street SE ......................................................................... ..5 3.2.5 SE Mosman Avenue ............................................................... ..5 3.2.6 E Yelm Avenue ..................................................................... ..6 3.3 Traffic Volume Data .................................................................... ..6 3.4 Public Transportation ................................................................... ..6 4. PRO]ECT TRAFFIC CHARACTERISTICS ........................................ . S 4.1 Site-Generated Traffic Volumes .................................................... ..8 4.2 Site Traffic Distribution ................................................................ ..9 5, FUTURE TRAFFIC CONDITIONS ................................................. 11 5.1 Future Traffic Vaiumes ................................................................. 11 5.2 Pipeline Development Prajects ...................................................... 11 5.2.1 Background Traffic Growth ..................................................... 11 6. TRAFFIC OPERATIONS ANALYSIS .............................................. 15 6.1 Intersection Level of Service ........................................................ 15 6.2 Signalized Intersections ................................................:.............. 16 6 2 1 15t Street/Yelm Avenue .......................................................... 16 6.3 Unsignalized Intersectians ............................................................ 17 6.3.1 3rd Street/Yelm Avenue ..........................:.............................. 17 6.3.2 SE 2nd Street/Yeim Avenue SE ............................................... 17 6.3.3 Mosman Avenue/S. First Street ............................................... 18 6.3.4 S. First Street/Washington Avenue .......................................... 18 6.3.5 S. Second Street/Washington Avenue ...................................... 18 6.4 Site Driveway Analysis ................................................................ 18 7. MITIGATION .............................................................................. 2D 7.1 Pay City of Yelm Transportation Mitigation Fee ............................... 20 7.2 Install Street Frontage Improvements ........................................... 20 8. CONCLUSIONS......f ........................R,..........N....NIN,NNY,..,.~...•.Y•s.e...• L1 Appendices Appendix A Appendix B Appendix C Appendix D List of Figures Turning Movement Counts Trip Generation Rate Review Traffic Volume Projection Worksheet Capacity Analysis Worksheets Figure ~. -Site Vicinity Map Figure 2 -Preliminary Site Plan Figure 3 -Existing 2006 PM Peak Hour Traffic Volumes Figure 4 ~ Site-Generated Traffic Volumes Figure S -Pipeline Development Traffic Volumes Figure 5 -Projected 2008 Traffic Volumes Without Project Figure 7 -Projected 2008 Traffic Volumes With Project City of Yeim Public Safety Building -Traffic Impact Analysis 'I . INTRODUCTION 1.1 Project Overview The City of Yelm is proposing construction of the Yelm Public Safety Building {PSB} in the City of Yelm. The project will be located between McKenzie Avenue SB and Washington Avenue S~ adjacent to and southeast of 2"~ Street. The project includes construction of an approximately 11,800 square foot (sf) building that will house City police and court facilities. Figure I iilustrates the site vicinity and the transportation network serving the project area. 1.2 Study Context This report documents the results of a Traffic Impact Analysis (TIA) of existing and future traffic conditions. The study was prepared according to City of Yelm TIA guidelines as part of the required environmental review submittal for the proposed project. The following intersections in the study area were analyzed: 1. Masman Avenue/First Street Sl; 2. First Street/Yelm Avenue 3. Yelm Avenue, 2"d Street 4. Yelm Avenue/Third Street 5. Second Street/Washington Avenue The project is expected to be completed by 2008, which was used as the horizon year for this study. Shea & Carr, Inc. Page 1 October, 2po5 i I ~J ~ ~ G; ~ ~h°~~~ ~ r f ~ ~~'~~ City of Yelm Public Safety Building -Traffic Impact Analysis 2. PROJECT DESCRIPTION 2.1 ©evelopment Proposal The City of Yelm proposes construction of a new Public Safety Building (PSB) to be located on the east side of 2nd Street between McKenzie Avenue SE and Washington Avenue SE. The building will house the City of Yelm Police Department and Municipa[ Court facilities. The proposed building will be approximately 11,80a square feet (sf) in size with approximately 2,118 sf dedicated to the Municipal Court, 5,220 sf for the police services and 4,47© sf of shared support area (including space for lobby, restroom and janitorial.} Access to the development will be provided by a ane-way entry driveway from 2na Street and atwo-way entry/exit on Washington Avenue SE. Parking will be provided in a dedicated lot off of Washington Avenue. Angle parking will also be provided along the south edge of the building on McKenzie Avenue. i"igure 2 represents the project site plan. Shea & Carr, Inc. Page 3 October, 2006 ~~s~ ~j bs0 +-, s~ U (]] fi O a, ~ ~ ~ U ~ ~ CO ~ N ~ ~ Y ~Q 4 ~ ~ ~ I.1J ~p O ~ 0 Z ~ L.l..l _ ~ LL U 3 ~ C¢ .~ ~ N ~ M Z E 4 `~ } ) Q o U ~ 3N 1S aNl Cf C .~ m ~ ~ ~ V ~ ~ d C ~` Q1 s~ LL T N _A C Q V CSf E o ~L ~ L at~w- City of Yelm Public Safety Building - Traf€ic Impact Analysis 3i. BACKGROUND INFORMATION 3.1 Area Land Uses Existing land uses in the area include single family residential to the south and east. A City Park is located to the west of the project and businesses are located to the north along Yelm Avenue and 15t Street. A City of Yelm public water reservoir is located directly north of the proposed Yelm PSB. 3.2 Roadway Inventory A comprehensive roadway survey was conducted to identify pre-existing conditions of the primary traffic facilities serving the proposed Yelm Pu,61ic Safety Building. For purposes of describing the roadways, avenues running generally parallel to Yelm Avenue are considered `east-west', and streets running generally parallel to 15t Street are considered `north-south.' The following is a description of the roadways in the vicinity of the proposed project. 3.2.1 SE McKenzie Avenue SE McKenzie Avenue is a two-way local street that runs east-west along the south edge of the subject property, ]:n the project vicinity the roadway has a 16-foot chip seal paved surface with grass shoulders. Sidewalks are not present along this section of roadway. 3.2.2 SE Washington Avenue SE Washington Avenue is a two-way local street that runs east-west along the north edge of the subject property. Along the project frontage the roadway has a 34-foot chip seal paved surface with sidewalk on each side of the roadway. Parallel parking is provided along the south side of Washington Avenue. 3.2.3 2nd Street Si= 2nd Street SE is a two-way local street that runs north-south along the west edge of the subject property. Along the project frontage the roadway has a 17-foot chip seal paved surface with gravel shoulders on each side of the roadway. There are na sidewalks on this section of roadway. 3.2.4 3rd Street SE 3rd Street SE is a two-way local street that runs north-south along the east edge of the subject property. Along the project frontage the roadway has two 11-foot chip seal paved lanes with 5-foot paved shoulders on each side of the roadway. There are no sidewalks on this section of roadway. 3.2.5 SE Mosman Avenue Mosman Avenue is a two-lane roadway with 4-6 foot grass/gravel shoulders. The posted speed limit is 25 mph. Shea & Carr, Inc. Page S October, 2006 City of Yeim Public Safety Building -Traffic Impact Analysis 3.2.6 E Yeim Avenue Yelm Avenue is a two-lane roadway that runs east-west through the City of Yelm. The roadway has two 12 foot lanes with 4-foot paved shoulders or curb and sidewalk. From Ist Avenue east to the City of Yeim limits, E Yelm Avenue is also designated as State Route 507. 3.3 Traffic Volume Data Trafficount, a traffic data collection firm, provided evening peak period turning movement counts. The counts were conducted between 4:00 PM and 6:00 PM for the following locations: 1. McKenzie Avenue SE/SE 2"d Street 2. Washington Avenue SE/SE 2"d Street PM peak hour turning movement counts were also available from the City of Yeim for the following locations: 1. Mosman Avenue/First Street 2. Yeim Avenue/f=irst Street 3. Yelm Avenue/second Street 4. Yelm Avenue/Third Street 5. Washington Avenue SE/SE Est Street These traffic volumes were used far our base year operations analysis, and as the basis for future year traffic volume projections, Figure 3 shows the existing 2006 traffic volumes for the study intersections. The turning movement count diagrams are provided in Appendix A. 3.4 Public Transportation Intercity Transit Route 94 provides daily service between Olympia/Lacey and 1Visqually Plaza in Yelm. The route runs along Yelm Avenue north of the subject property, providing hourly service on weekdays and service every two hours on weekends. Shea & Carr, Inc. Page 6 October, 2006 ~ti s ~ a ~~ P ~ ~~ ~S ~ti ,moo h dS xr h1 h O ! y ~s /Yl~ f, r e ~ R ~s` ` `~sx +~ `. S ~ ,~~h ~ Q ,V~ ti ~y~s ~ti°~o ~s s ~a ~'~~ ~ ~~ ~ ~ ~v~`` 5~ ! ~ sF ~ r ~ ~ „ y ~ t~1 •~~,h1h~ ~ `h ~ _d\ ,.. ~s R s s z s~ _._.~_.,.......:.~. x. d ~~p~ ~.1 ~ ~~~~ !~ ~~ s ~ ~ ~ ::.......................... . , ~'~ P ~ ~ , ~ h OA 'Vh ~ h ~~~ ~ ~ ~~ ~~~~ 0 1,P Q, s~ ~1 ~S~ `9n O~ S ~ ~ ~`r~ P~ ~S Z wryyh o~~P ~ ~S oyz ~ 0 .j'f~ ~ 9~ s~~ ~ R r ~s~s~ ~~ .~ ~~~ o~ U ~ ~ ~ ~ ¢ U Q z ~ ~ ~~ ~ W ~ S ~ p 'n V ~ Q Q ~ W J 0. ~ ~' ~ Lil ~ J T+ T+ 1 1 X ~ d V ~ ~ «~ ~ ~ L m O ,~+ _~ c~ ~ AA~ ff ,, I~w V a~ N ~ ~J O W V c~ L1. N .N 9+ C a Q City of Yelm Public Safety Building -Traffic Impact Analysis 4. PROJECT TRAFFIC CHARACTERISTICS The two project-related characteristics having the most effect on area traffic conditions are peak hour trip generation and the directional distribution of traffic volumes on the surrounding roadway network. 4.1 Site-Generated Traffic Volumes The City of Yelm has established a listing of Trip Generatian Rate Default Values (Table 15.40.030. B.1 from the City of Yelm Municipal Code) that are to be used to calculate project traffic generation when applicable. However, no land-uses on that table correlate well to the proposed development. The closest match is 'Administrative office' which has a PM peak hour trip generation rate of 2.30 trips per 1,000 square feet. In lieu of using the City's trip rate schedule, an independent trip generation rate review was performed for this development. The Trip Generatian report by the Institute of Transportation Engineers (ITE} was referenced to find an applicable land- use. The Government Office Complex land-use (Land Use Code 733) was determined to be the best match for the proposed development. Due to the small sample size (two studies), additional analysis was required to corroborate the PM peak hour trip generation rate (2.85 per 1,000 square feet) for LU 733. Therefore a trip generation estimate was also prepared for the project by directly projecting the trip characteristics of all of the uses programmed for the proposed Yeim PSB. Interviews were conducted with Yelm police and court staff to identify the total employment and customer traffic that could be expected to occur at the project during peak periods of the day. This analysis indicated a PM peak hour trip generation rate of 2.72 per 1,000 sf. This additional trip generation estimate provided confirmation of the rates contained in the ITE Trip Generation The trip generation rates used For this analysis are shown below in Table 1. The trip generation rate review is summarized in Appendix B. Table 1 Trip Generation Characteristics Yelm Pu61ic Safety Building ITE Land Use Daily Trip PM Peak Hour {LU Code) Unit Rate Trip Rate Inbound Outbound Government Office Complex (LU 733) 1,000-sf 27.92 2.85 31% 69% Shea & Carr, Inc. Page 8 October, 2006 City of Yelm Public Safety Building -Traffic Impact Analysis The total trip generation expected from this development is calculated by applying the total number of units to the appropriate trip generation rate. The proposed building will be approximately 11,765 square feet. The project trip generation is shown on Table 2, Table 2 Total Project Trip Generation Summary Yelm Public Safety Building PM Peak Hour ITI~ Land Use (LU Code) Units Daily Trips Total Trips Inbound Outbound Government Office Complex (LU 733) 11.765 3Z8 34 11 Z3 4.2 Sito Traffic Distribution The vehicle directional trip distribution to and from the site will be based primarily on: • the area street system characteristics • current travel patterns on the area roadways • the proposed access system for the project • locations of residential areas and shopping/commercial centers The directional distribution of traffic to and from the proposed project was estimated using the regional transportation model. The Thurston Regional Planning Council (TRPC) created the area-wide transportation model with cooperation from local jurisdictions within the County. The model, developed using the Emme/Z software package, has been calibrated to accurately represent the existing vehicle travel patterns throughout the entire county. In the transportation model, the county-wide transportation network is divided into over 600 "Traffic Analysis Zones" (TAZs). The proposed Yelrrl PSB property is located within TAZ number 545. A distribution analysis was performed for this project by conducting a "Select Zone Analysis" for TAZ 545. This feature of the ~mme/Z software package allows all of the traffic into and out of a particular zone to be isolated and shown separately from the rest of the traffic on the network. This graphically shows the percentage of vehicles currently using each of the available routes into and out of the area (Yelm Avenue, First Street, Washington Avenue, etc.). From this information, regional distribution percentages were calculated for future traffic from the proposed Yelm PSB project. The regional traffic distribution percentages and site traffic distribution for the Yelm PSB development are shown on Figure 4, Sbea & Carr, Inc. _ _ Page 9 October, 2005 O N ~ ~ ~~ \ 0 " oy ~ ~ ' s ~~ \° ~ ~ ~ P v~ ~` ~s ~y q 1s ~~ oy Oryf, ~ t~ ~ ~ o ~ ~, P ~ ~., 1' ` ~~ ~ ~ .~y ~ ! ~ c, 2 ~S ~ ~v ~ OyZ ~ ~ ~ s~ ~ ~ R Z o e ti ~ r~, ~ ~ ~ y , , . .......................a.~ I~OB ~~~~~ t ._ / \ v ,~.~~ ~ Q. z ~' ....................... ~ _ . .................... y R! ~ ~ ~ ~ _. ~ ~~ ~ ~~ ~ y e ~ ~, P y ~ ~~~ S O ~ ss ~ M ~ ~ ~{ Q~`' ~'S ~S ~~ V L LL ~ J ~ ~~ ~ O p ~ j ~/ w ~ ~ Q ~ .. .J C ~ `~ ~ V ~ W ~ ~ ~ o {- o ° ° N ~ o Q ~- ~~ m ~ ~ N ca ~ Q N Z ~ °- W j N W W ~ Q (7 Z ~ W ~~ W o ~ ~- J ~ ~ o~ o ~. W ~ '~ '~ 0 ~ X O d' d L _~ N _~ O V ~ ~ ~ m A`~ ^IW N Y ~ `~ ~+ ~~ .V ~ 3a ~ n. ~ O ~ Q .~c ~ ~ a O v ~ `~' `~ ^ City of Yelm Public Safety Building -Traffic Impact Analysis J. FUTURE TRAFFIC CONDITIONS 5.'! Future Traffic Volumes Future traffic volume projections for the study area include traffic generated by pipeline developments and background growth. 5.2 Pipeline Development Projects A pipeline development project is defined as a development in the project area that is either under construction, approved for construction or in the permitting process. 1=or this study, seven projects were identified that will add traffic to the study intersections and were included in the future year traffic volume scenarios. The projects are listed below: ~. Willow Glen 3 {52 lot plat) 2. Terra Valley (41 lot plat) 3. Tahoma Terra (~1,Z00 unit Master Planned Community) ~. Wal-mart (187,000-sf retail) 5. Green Village (52 lot plat) 6. Mountain Shadow {82 lot plat) 7. Mountain Sunrise (102 lot plat) The traffic potential of these projects was calculated and assigned to the area roadway network using data presented in the Traffic Impact Analyses for each of the projects. The total pipeline development traffic volumes are shown an the traffic volume worksheet in Appendix C. Figure S illustrates pipeline development traffic trip distribution, 5,2.1 Background Traffic Growth In addition to traffic from the identified pipeline developments, it is anticipated that background growth will occur within the study area and affect traffic volumes. To estimate the non-specific traffic growth that will occur at the study intersections, we applied an annual growth rate of 2% to the base year traffic volumes. The 2% growth rate is based on historical growth trends and was determined by the City of Yelm. The projected 2008 traffic volumes with background growth and pipeline development traffic, without the Yelm P58 project are shown on Figure 6. The 2008 with Yelm PSB project traffic volumes are shown an Figure 7. The traffic volume calculations for the study intersections are shown in Appendix C. Shea & Carr, Ir~c. Page I1 October, 2006 ,~y ~s ~~ ~~ P ~ ~ ,~S .~y~s ~'~ `~~~ pd~ ~ ~~ ~s~l ~ ~~ ~ ~ ~ ~~ P ,V~ ~ ~y~s R.~ ti'~~ s Oy Z ~v~~ ~ ~, ~ u ~ ~ , ~ ~ ~ s,~ ~ ~i ~ 8~f' c~~c. f' ~' % k ~. P / d ,,.......m ................... _~...._ .............. ti ~~ 11 ~ ~ ~s ~P P~ ~ s ~ ~ ~ `~{ Q~ ~s ~~P~ ~S ~yZ ~s `~~ R ~s s9 ~' R ~~ 6~ ~~ Ord J b ^ Li ~ z w V Y ~ W ~- ~ `T F r LL V t~ ~ ~ 0 Y ~_ ~ ~~ G3 m ~ ~ a~~, o ~a ~, a ~ ~ ~ a ^~ W ~ ~~"' • •~ ~UF- ~''N ~s ~~ ~~ P -~`~ ms's .~,y ,o ap ~`S' r`+ °' p Od, s~ ~ R ~o ,~5, 'yl~s ~! x. s~ ~ 7 ~, '~'`~Op 4 P ~~ 2 .~y'lS ~~p O`' '~J' ~ p ~/y~ /~ r h ~ ~ ~~~~ c~' ! s~ ~ ~ ~ ` h ~_~~r. ~ph~~~ ~ ~~ tip p~h ~~ ~( h - ~'~ al O ~ ~~~. O 06, ~ ~ VrlD~c' ,Sj~~ 5~ leers, ~ /%..,..... ~. h p ~ v O '`0~ `lh hA h ~'1oi`~~p~l ~ t~h~~~C~ 71 P ~ O ~ s~~ ~ R~ss ~ .' `s ss s ~ ` ~ 03~ -tom`' . , o.,r ~ ~ ~ ~ ~s ~ ~ P ~s ~ ~~hh ~o~~P ~s MHz O~ ~! ~~ o ss ~ '~'~ s~ ~ ~o ~ a~~~.,+ ~~ o ~ ~~ © U ~ S z ~~ ~~ W ~z Y Q W J ~ N ~ ~ ~' ~ J X ~ X ~ i~7 LL v c~ .O ~_ N Q1 O V ~_ ~ ~~ ~ m O ~ ~ pct ~ ,N ~- ~ ~. LL ~ ~ ~~a ~~~ N ^~ Q.. W d ~" O ~/ •O a ti ~-- ~y ~s ~~ ~~ P ~ ~~ ~S .~,y ~o ao ~~ ~ a o ~S ~~ ~' ~ od~ ri ~~~ s.~ s ~ ~, ~ ~ ~~ 2 ~ .~y~3' ~~o oh O ' `' ~ ~~~~ s 'l`f! do ~ y ~ rr ~ Y R ~Og ~ h ~~, ~`.'s'ww !n\ `. , aa.~ ~ os~ ~ s~~z srz~ c,~ ~ ~ o~, ,~ ~ r o~ f ~ ~ ~ ~ y ~ ~ P E: / ,`per ~, hn- _. " > ~ R' ~~ ~ ~~h~~~U - ~ 71 P sf' ~ ~ ~ ~S' P~, F' {~ s~ ~ •rs~ss ~~ nor ~o s ~s mss, P~ ~s ~ITP~ `b4' is ~~Z ~ p ~ ~ ~ O O~~ V 4o s~ ~ S~ os~, OF~ y d ~p alt ~~1~~ oG'~ ~ V ~ ~~ J V Q Z ~ ~" ~, ° w ~~ Y yQ W ~ W J aN QW ff x, x, ti c~ LI.. v d ~O a ~_ d ~_ ~ _ O m .N a ~, a .ii ~ ~~a oa N ~ ~ d ~ ~ ~ O v 'o~~ o. v F-- City of Yelm Public Safety Building -Traffic Impact Analysis 6. TRAFFIC OPERATIONS ANALYSIS Traffic analyses were conducted to identify any existing deficiencies within the study area for the 2006 base year and 2008 project completion horizon years. 6,1 Intersection Level of Service The acknowledged source for determining overall capacity for arterial segments and independent intersections is the current edition of the Highway Capacity Manual {HCM). Capacity analyses were completed for the base year and projected 2008 PM peak hour traffic volume scenarios. Intersection analysis was performed using the Synchro software package. Synchro is a software package commonly used to analyze signalized and unsignalized intersections. The software implements the methods of the 2000 Highway Capacity Manual. Capacity analysis results are described in terms of Level of Service (L05). LOS is a qualitative term describing operating conditions a driver will experience while traveling on a particular street or highway during a specific time interval. It ranges from A (very little delay} to F {long delays and congestion}. Level of Service D is the concurrency standard adopted by the City of Yelm for most of the study area. The only exception is the designated Central Business District (CBD} core area between Solberg Street and 4~" Street where a LOS F condition is considered acceptable. Level of Service calculations for intersections determine the amount of 'control delay' {in seconds} that drivers will experience while proceeding through an intersection. Control delay includes all deceleration delay, stopped delay and acceleration delay caused by the traffic control device. The Level of Service is directly related to the amount of delay experienced. For intersections under minor street stop-sign control, the LOS of the most difficult movement {typically the minor street left-turn} represents the intersection level of service. Table 3 below shows the level of service criteria for unsignalized intersections. Table 3. Level of Serrrice Criteria for Stop-Sign Controlled Intersections level of Service Average Control ©elay (seconds/vehicle) A <10 B > 10 - 15 C > 15-25 D > 25 - 3S E > 35 - 50 F > SO Shea & Carr, Tnc. Page 15 October, 20fl6 City of Yelm Public Safety Building -Traffic Impact Analysis Table 4. Level of Service Criteria for Signalized Intersections Level of Service Average Control Delay (seconds/vehicle) A < ~, 0 B >la-2a c >2a-35 D > 35 - 55 E > 55 - 8a F > 80 The capacity analyses were completed for traffic volume conditions expected to occur during the evening peak period at all study intersections for the following three traffic volume scenarios: • Existing 2006 traffic volumes • Projected 2008 traffic volumes without Yelm PSB • Projected 2008 traffic volumes with Yelm PSB The capacity analysis worksheets are provided in Appendix D. Fallowing is a description of the Level of Service analysis for the study intersections for the scenarios listed above. 6.2 Signalized Intersections 6.2.1 1St StreetlYelm Avenue This intersection operates under actuated traffic signal control with protected left- turns an Yelm Avenue and protected-permissive left-turns on 15t Street. The eastbound approach on Yelm Avenue has single exclusive lanes for each movement, The westbound, northbound and southbound approaches each have exclusive left- turn lanes and shared through-right lanes. The intersection currently operates at LQS D during the PM Peak Hour. It is projected that with the addition of pipeline development traffic it will operate at LOS F in 2008. The average delay at the intersection will increase by less than one second (from 83.5 to 84.5 seconds of delay) with the addition of project traffic. The following table summarizes the LQS analysis results for the intersection. No mitigation is required at this location. Shea & Carr, Inc. Page 16 Oceober, 2006 City of Yelm Public Safety Building -Traffic Impact Analysis Table 5 Yelm Avenue/First Street LOS Operationat Summary - PM Peak Hour Base Year 2006 Projected ZODS Without Project Projected 2008 With Project Approach LOS (Delay) LOS (Delay) LOS (Delay) Southbound D {48,2) F (86.5) F (85,9) Northbound D {45,9) F (105.1} F (107.9) Westbound C (33.3) E (59.6) E (59.6} Eastbound C (34,2} F (92.7} F (94.1) Total Intersection D (38.1) F (83.6) F (84.5} 6.3 Unsignalized Intersections 6.3.1 3rd StreetlYelm Avenue The 3rd Street/Yelm Avenue intersection has a single approach lane in each direction, with stop sign control on 3rd Street. The northbound and southbound approaches each currently operate at LOS F condition during the evening peak hour. With the addition of background traffic, the intersection delay will increase. The proposed Yelm PSB project will add approximately nine vehicles to this intersection during the PM peak hour and will slightly increase the projected delay. The City of Yelm has designated the Yelm Avenue corridor between Solberg Street and 4t" Street as an exception area where LOS F is acceptable, Although the minor street approaches will have a poor level of service, the grid system in the area allnws drivers multiple options to gain access to the main street system (1St Street and Yelm Avenue.) No mitigation is required at this intersection. 6.3.2 SE 2nd StreetlYelm Avenue SE This intersection has a single approach lane in each direction. The Washington Avenue approaches are under stop sign control, During the evening peak hour, the north- and southbound approaches operate at LOS F. With the addition of background traffic, the intersection delay will increase, The proposed Yelm PSB project will add approximately nine vehicles to this intersection during the PM peak hour and will slightly increase the projected delay. As previously stated, this intersection is within the LOS exception area where LOS F is deemed acceptable. Although the minor street approaches will have a poor level of service, the grid system in the area allows drivers multiple options to gain access to the main street system (1St Street and Yelm Avenue.) No mitigation is required at this intersection. Shea & Carr, Inc. Page 17 October, ~Oa6 City of Yelm Public Safety Building -Traffic Impact Analysis 6.3,3 Mosman AvenuelS. First Street The intersection of Mosman Avenue and First Street consists of two tee intersections. Both approaches on Mosman Avenue are under stop sign control. The southern tee intersection currently operates at LOS C for the eastbound approach and an intersection average of LOS A. By 2008, it is projected to operate at LOS F for the eastbound approach with a LOS C overall average both with and without project traffic. The northern tee intersection currently operates at LOS C for the westbound approach and an intersection average of LOS A. It is projected to operate at LOS C for the westbound approach and an overall average of LOS A by project horizon in 2008. The City of Yelm is planning to improve this intersection by realigning the Mosman Avenue/15~ Street intersection as a single four-way intersection. The improvement project will also include widening Mosman Avenue from Edwards Street to 15~ Street. The roadway improvement project is on the City's 6-year Transportation Improvement Program and they are currently collecting fees toward the improvement. No mitigation is required at this intersection. C.3.4 S. First StreetlWashington Avenue This intersection has a single lane in each direction with stop sign control on Washington Avenue. It currently operates at LOS C for the east- and westbound approaches and an overall LOS A intersection average. By 2008, it will decline to LOS D for the east- and westbound approaches and an overall LOS A both with and without project traffic. No mitigation is required at this intersection. 6.3.5 S. Second StreetlWashington Avenue The Washington Avenue/Second Street intersection has a single lane in each direction and stop control on Washington Avenue. It currentiy operates at LOS A during the PM Peak Hour and will continue to operate at LOS A in 2008, both with and without the addition of Yeim Public Safety BuNding traffic. No mitigation is required at this intersection. 6.4 Site Driveway Analysis The proposed project will have two access points: a one-way entry driveway from 2~'d Street and atwo-way entry/exit on Washington Avenue SE. The driveway from 2"d Street will be available only to police vehicles. Far our analysis, we have assumed that all trips entering the parking lot during the PM Peak Hour will occur at the Washington Avenue driveway. The driveway will have a single lane entry and a single lane exit. At project completion in 200$, it will operate at LOS A. Shea & Carr, Inc. Page J.8 october, 2006 City of Yelm Public Safety Building -Traffic Impact Analysis The following table summarizes the operational results for the study intersections: Table 5 Level of Service {LQS) Summary -Stop Sign Controlled intersections PM Peak Hour Existing 2006 Volumes Projected 244$ Without Project Projected 2008 with Project LOS (Delay) LOS (Delay) LOS (Delay) Intersection Worst Movement intersection Average Worst Movement Intersection Average Worst Movement Intersection Average SW Mosrrtan Ave/1St St. C {24.1} A {6.6} F (68.6) C (17.5} F (70.8) C (18.0} 5E Mosman Ave/ist St. C (1b.9) A {1.6) C (21,2} A {1.7) C (22,2) A (1.8) 2"d St/Yelm Ave. F (96,2) A {2.2) F {>500) ~ {49.1) F {>500) F (52.2) 3`d St/Yelm Ave. F (487.2) A {9.7) F{>500) n/al F{>500) n/a` Washington Ave/15t St. C (22.4) A (3.2} D (3(3.2) A (3.5) D (29.5) A (3.7) Washington Ave/2"d 5t. A (9.6) A (5.4) A (9.6) A (5.4) A (9.8) A (6.2) Site access/Washington Ave A (9.0) A (3.1) i3 n/a -Not availat~le. Data is outside of the range provided for in the software algorithm, Shea & Carr, Inc. Page 19 October, 2006 City of Yelm Public Safety Building -Traffic Impact Analysis 7. MITIGATION Traffic generated by the proposed Public Safety Building will have a minimal impact on the area roadways and intersections. This analysis has evaluated several intersections for conditions expected by the 2008 project horizon. Based on the analysis, two intersections {Yelm Avenue/3rd Street and Ye1m Avenue/Z"~ Street} will operate at a constrained LOS F level by 2008 without trips generated by the project. f~iowever, the City of Yelm through it's Comprehensive Plan has designated the CB© area of the City as an exception area where LOS F is an acceptable condition. Although the minor street approaches for the intersections will have a poor level of service, drivers have numerous options for routes because of the downtown grid system and can avoid the failing intersections. The following mitigation by the City of Yelm will mitigate the overall traffic impacts associated with the project. 7.1 Pay City of Yelm Transportation Mitigation Fee The City of Yelm is currently collecting transportation facilities charges from new developments to help fund roadway and intersection improvements throughout the City. The project developer would be responsible for a payment of $750 per new PM peak hour trip generated by the project, or a total of $25,500. The City of Yelm's current 6-Year Transportation Improvement Program (STIP) lists the Z"d Street improvement project that will widen and improve Z"`' Street to collector standards from Mosman Avenue to Yelm Avenue. The Yelm PSB project will construct the entire improvement in lieu of the $25,500 transportation facility charge. 7.2 Install Street Frontage Improvements In addition to the 2nd Street improvements, the Yelm PSB project will construct improvements to Mckenzie Avenue as part of site development. The improvements will include curb and gutter on the north side of McKenzie and two drive lanes from Z"d Street to 3rd Street. Curb and gutter on the south side of Mckenzie Avenue will be added along the project frontage. Shea & Carr, Inc. Page 20 Dctober, ZOOb City of Yelm Public Safety Building -Traffic Impact Analysis ~. coNC~usNONs The City of Yelm proposes construction of a new Yelm Public Safety Building (PSB) to house the City of Yelm Police Department and Municipal Court facilities. The proposed building will be approximately 11,800 square feet in size. Access to the development will be provided by a one-way entry driveway from 2"d Street and a twa-way entry/exit on Washington Avenue SE. Parking will be provided in a dedicated lot off of Washington Avenue. This study has analyzed several off-site intersections for the 2008 horizon. Based on the analysis, this project will not have a significant impact on area roadways. The project will be responsible to pay a Transportation Facility Charge to the City of Yelm as mitigation for the project. Shea & Carr, Inc. Page 21 October, 2006