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TrafficCrystal Springs Estates Residential Development Yelm, Washington "transportation Impact Study )uly 20, 2005 Prepared for• Crystal Springs Estates LLC 1252 Devon Loop 1VE Olympia, WA 98506 Prepared by: ~- Transportation Engineering Northwest Transportation Engineering/Operations • Impact Studies • Design Services • Transportation Planning/Forecasting '""' 16625 Redmond Way, Suite M, PMB 323 • Redmond, WA 98052 • Office/Mobile (206) 396-8286 • Fax (425) 398-5779 Crystal Springs Estates - Yelm, WA Traffic Impact Study Table of Contents FINDINGS 8~ CONCLUSIONS ....................................................................................................... ...1 INTRODUCTION ............................................................................................................................ ...2 Project Description ................................................................................................................... ...2 Traffic Study Approach ............................................................................................................. ...2 Primary Data and Information Sources ..................................................................................... ...3 EXISTING CONDITIONS ............................................................................................................... ...6 Study Area ................................................................................................................................ ...6 Existing Traffic Volumes ........................................................................................................... ...6 Existing Intersection LOS ......................................................................................................... ...6 Non-Motorized Transportation Facilities ................................................................................... .10 Public Transportation Services ................................................................................................. .10 Planned Transportation Improvements ..................................................................................... .10 DETERMINATION OF IMPACT ..................................................................................................... .12 Trip Generation ..............................................................................:.......................................... .12 Trip Distribution and Assignment .............................................................................................. .12 Traffic Volume Impact ............................................................................................................... .14 Intersection LOS Analysis ........................................................................................................ .14 Site Access Analysis ................................................................................................................ .17 Non-Motorized Impacts ............................................................................................................. .18 Public Transportation Impacts .................................................................................................. .18 MITIGATION MEASURES ..............................................................................................................19 Appendix A -Traffic Counts Appendix B -Intersection LOS Analysis Results Appendix C -Future Traffic Volume Estimates Transportation Engineering Northwest i July 20, 2005 Crystal Springs Estates - Yelm, WA Traffic Impact Study List of Figures and Tables Figure 1. Project Vicinity ...............................................................................................................................4 Figure 2. Proposed Site Plan ........................................................................................................................5 Figure 3. Existing Channelization and Traffic Control ...................................................................................7 Figure 4. Existing 2005 PM Peak Hour Volumes ............................... Figure 5. PM Peak Hour Trip Distribution and Assignment ............... Figure 6. 2007 Without Project PM Peak Hour Traffic Volumes ....... Figure 7. 2007 With Project PM Peak Hour Traffic Volumes ............ ........................................................8 ......................................................13 ......................................................15 ......................................................16 Table 1. LOS Criteria for Signalized and Unsignalized Intersections ...........................................................9 Table 2. Crystal Springs Estates Existing PM Peak Hour LOS Summary ...................................................9 Table 3. Crystal Springs Estates (Net 22 Lots) - Trip Generation Estimates ..........................................12 Table 4. Crystal Springs Estates 2007 PM Peak Hour LOS Summary .....................................................17 Transportation Engineering Northwest ll July 20, 2005 Crystal Springs Estates - Ye1m, WA Traffic Impact Study F[ND[NGS 8T CONCLUS[ONS Project Proposal. The Crystal Springs Estates development proposes up to 23 single- family residential homes. The site is located to the west of the Crystal Springs Road / View Drive intersection in Yelm, Washington. There is one existing home that would remain on-site as part of the proposed development. Therefore, a net total of 22 single- family residential homes would be provided. Vehicle Access. Access to the existing home on-site is currently provided via a gravel driveway aligned as the west leg of the Crystal Springs Road /View Drive intersection. This existing access onto Crystal Springs Road would be improved to meet City of Yelm design standards for a Local Access Residential roadway and would continue to operate as the west leg of the Crystal Springs Road /View Drive intersection. Access roadway improvements would consist of a parking lane, 6-foot planter strip, and rolled curb and gutter on both sides of the street with a S-foot sidewalk on one side of the street. Trip Generation. Project buildout is estimated to generate a net of about 210 daily trips, with 16 occurring during the AM peak hour, and 22 during the PM peak hour. Study Area Operations. All controlled movements at the intersection of Yelm Avenue / Edwards Street are anticipated to operate at LOS D or better with or without the proposed development in 2007. Site Access Impacts. All controlled movements at the proposed site access intersection of Crystal Springs Road /View Drive are anticipated to operate at LOS B or better during the weekday PM peak hour, with no queuing impacts as a result of the proposed residential development. Non-Motorized Impacts. Half-street frontage improvements will be provided on the western half of Crystal Springs Road along the property frontages to meet City standards for a Neighborhood Collector. The half-street frontage will include new curb, gutter, 7- foot planter strip, and 5-foot sidewalk. Mitigation. The following is identified to mitigate the traffic impacts of development. 1. Traffic Impact Fee. The Crystal Springs Estates development would be subject to a $16,500 traffic impact fee ($750 per PM peak hour trip X 22 trips), which is based on 23 proposed residential lots with one existing home to remain on-site for a net of 22 residential lots. 2. Non-Motorized Improvements. New curb/gutter/sidewalk will be provided on one side of the proposed internal plat road (View Drive), and half-street frontage improvements will be provided on the western half of Crystal Springs Road along the property frontages to meet City standards for a Neighborhood Collector. The half-street frontage will include new curb, gutter, 7-foot planter strip, and 5-foot sidewalk. Transportation Engineering Northwest July 20, 2005 Crystal Springs Estates - Yelm, WA INTRODI.ICTION Traffic Impact Study This traffic impact analysis has been prepared for the proposed Crystal Springs Estates residential development. The scope of work for this analysis is based upon phone conversations with the City of Yelm in June/July 2005. Project Description Location. The proposed Crystal Springs Estates residential development is located west of the Crystal Springs Road /View Drive intersection in the Yelm urban growth area. See Figure 1 Vicinity Map. Vehicle Access. Primary vehicular access would continue to be provided via an existing driveway onto Crystal Springs Road west of its intersection with View Drive. This existing access roadway would be improved to meet City of Yelm design standards for a Local Access Residential roadway and would continue to operate as the west leg of the Crystal Springs Road/View Drive intersection. Access roadway improvements would consist of a parking lane, 6-foot planter strip, and rolled curb and gutter on both sides of the street with a 5-foot sidewalk on one side of the street. The proposed site plan is shown in Figure 2. For the purpose of this traffic impact study, 2007 was selected as the build-out year based upon anticipated completion and full occupancy of the proposed development. Traffic Study Approach The report documents the evaluation of traffic impacts and recommended mitigation measures for the proposed development. To evaluate the traffic impacts of the Crystal Springs Estates, the following tasks were undertaken: • Described and assessed existing transportation conditions in the area; • Discussed planned transportation improvements; • Documented future without-project traffic forecasts and assumptions; • Estimated trip generation and documented distribution of project traffic; • Evaluated intersection LOS at two study intersections (one as site access) for weekday PM peak hour conditions; • Assessed impacts to public transportation services and non-motorized transportation facilities; • Analyzed site driveway impacts; and • Identified mitigation measures and transportation mitigation fees. Transportation Engineering Northwest 2 July 20, 2005 Crystal Springs Estates - Yelm, WA Traffic Impact Study Primary Data and Information Sources • Year 2005 PM Peak Hour Traffic Volumes; source: All Traffic Data Services, Inc. • Highway Capacity Manual (HCM), Special Report 209, Transportation Research Board (TRB), Year 2000 Edition. • City of Yelm Development Guidelines -July 19, 2000. • City of Yelm 2005-2009 Six-Year Transportation Improvement Program, adopted July 2005. • Institute of Transportation Engineers (ITE) Trip Generation Manual, 7th Edition, 2005. • City of Yelm Municipal Code 15.40 - Concurrency Management. Transportation Engineering Northwest 3 July 20, 2005 Crystal Springs Estates - Yelm, WA Figure 1. Project Vicinity Traffic Impact Study Traffic Irt~act Study Transportation Engineering Northwest 4 July 20, 2005 Transportation Crystal Springs (~ Figure 1 Estates Engineering Northwest, LLC Project Vicinity Yelm, Washington Crystal Springs Estates - Yelm, WA Traffic Impact Study Figure 2. Proposed Site Plan ---R ~ - d' /=I ~ _},~,~ _ _ _ P,~ _ _Crystal Springs Rd N1N: _ _ _ _ _ ~_ ~ I ~ ~ W ~ ~ ~ -I / ~. ~ ~ S 'ti~__ ` z~ T ' ~~ '-.~ !~ ~ e ~_ ~i ~ " `~" ~ ~___\ ~, ~ ,.~ © ~ ~.- - - Not to Scale Source: Olympic Engineering, Inc., July 18, 20Q5. Y Crystal Springs t~ Transportation Figure 2 Estates Engineering Northwest, i.i.c Proposed Site Plan Yelm, Washington Traffic Impact Study Transportation Engineering Northwest 5 July 20, 2005 Crystal Springs Estates - Yelm, WA Traffic Impact Study EXISTING CONDITIONS Study Area For existing conditions near the project site, the study intersections of Yelm Avenue / Edwards Street and View Drive /Crystal Springs Road (Site Access) were evaluated. Figure 3 illustrates the existing channelization and traffic control at the following two study intersections: Yelm Avenue (SR 510) is classified as an Urban Arterial with a posted speed limit of 25 mph to 35 mph within the city limits. The roadway has one travel lane in each direction. A center turn lane exists on Yelm Avenue west of Edwards Street. Crystal Springs Road is a Neighborhood Collector with two, 11-foot travel lanes, and 6- to 9-foot paved shoulders in the vicinity of View Drive: The speed limit is posted at 25 mph. View Drive is an unchannelized two-lane Local Access Residential roadway with 23 feet of pavement width, 4-foot gravel/grass shoulders, and a posted speed limit of 25 mph. Existing Traffic Volumes Weekday PM peak hour traffic volumes were collected in 2005 at the two study intersections. Figure 4 illustrates the 2005 PM peak hour traffic volumes at the study intersections, and Appendix A provides detailed traffic volume counts. Existing Intersection LOS Existing 2005 weekday PM peak hour level of service (LOS) analyses were conducted at the two study intersections. The existing channelization and traffic control at the two study intersections was illustrated in Figure 3. Level of service (LOS) serves as an indicator of the quality of traffic flow and degree of congestion at an intersection or roadway segment. It is a measure of vehicle operating speed, travel time, travel delays, and driving comfort. Level of service is generally described by a letter scale from A to F. LOS A represents free-flow conditions, i.e. motorists experience little or no delays, and LOS F represents forced-flow conditions. Transportation Engineering Northwest ( July 20, 2005 Crystal Springs Estates - Yelm, WA Traffic Impact Study Figure 3. Existing Channelization and Traffic Control Traffic Impact Study Transportation Engineering Northwest ~ July 20, 2005 ~~,, Transportation Figure 3 Crystal Springs (~ Estates Engineering Existing Channelization and Northwert, i.i.c Traffic Control Yelm, Washington Crystal Springs Estates - Yelm, WA Figure 4. Existing 2005 PM Peak Hour Volumes Traffic Impact Study Traffic Impatt Study Transportation Engineering Northwest g )uty 20, 2005 Crystal Springs +~ Transportation Figure 4 Estates Engineering Northwest, i.i.c Existing 2005 PM Peak Hour Volumes Yelm, Washington Crystal Springs Estates - Yelm, WA Traffic Impact Study Table 1 summarizes the delay range for each level of service at signalized and unsignalized intersections. The methods used to calculate the levels of service are described in the Highway Capacity Manual (Special Report 209, Transportation Research Board, 2000). The LOS at stop-controlled intersections is based on the average control delay (sec/veh) and is reported for each movement. The City of Yelm maintains a LOS D standard. Table 1. LOS Criteria for Signalized and Unsignalized Intersections Signalized Intersection Unsi;analized Intersection Level of Service Dela Ran a sec Dela Ran a sec A < 10 < 10 B >10 to 20 >10 to 15 C >20 to 35 >15 to 25 D >35 to 55 >25 to 35 E >55 to 80 >35 to 50 F >80 >50 Source: "Highway Capacity Manual", Special Report 209, Transportation Reseazch Board, 2000 Intersection LOS were calculated using the methodology and procedures outlined in the 2000 Highway Capacity Manual, TRB Special Report 209, using the software program Highway Capacity for unsignalized intersections. Existing weekday PM peak hour LOS analysis results for the two study intersections are summarized in Table 2. Detailed LOS worksheets are provided in Appendix B. Table 2. Crystal Springs Estates Existing PM Peak Hour LOS Summary Study Intersection Movement LOST Delay2 V/C3 1. View Drive /Crystal Springs Road (Site Access) Eastbound - _ __ Westbound A 9.3 0.01 Northbound Left A 7.3 0.00 Southbound Left A 7.5 0.00 2. Yelm Avenue / Edwards Street Eastbound Left A 9.2 0.02 Westbound Left A 8.9 0.01 Northbound C 15.8 0.03 Southbound C 17.5 0.09 I. LOS analyses are based on methodologies established in the 2000 Highway Capacity Manual. 2. Delay =average control delay per vehicle. 3. V/C =Volume to Capacity ratio. 4. All signals were assumed to be fully actuated; splits were optimized. Transportation Engineering Northwest 9 July 20, 2005 Crystal Springs Estates - Yelm, WA Traffic Impact Study As shown in Table 2, all controlled movements at the unsignalized study intersections currently operate at LOS C or better. Non-Motorized Transportation Facilities Adjacent to the property site, 6- to 9-foot paved shoulders exist on both sides of Crystal Springs Road and 4-foot gravel/grass shoulders are provided on both sides of View Drive. Public Transportation Services Existing transit services are provided with a transit stop on View Drive, east of Mountain View, approximately 200 feet from the proposed development serving Intercity Transit Route #93. This transit route provides service between residential neighborhoods and commercial areas within the City of Yelm with stops every half-hour from 8:30 a.m. until 6:45 p.m. on Saturdays only. Planned Transportation Improvements There are several planned transportation improvement projects identified in the project vicinity .for the six-year period between 2004 and 2009. The planned improvements were identified in the City of Yelm's Six-Year Transportation Impravement Program (TIP). The projects that would improve intersections and/or roadways within the study area are identified below, although few are expected to be complete by 2007. Priority #1: Y-3 Corridor (SR-510 to SR-507) -called Yelm Loop Segment 1. This project is part of a larger WSDOT road improvement to provide a direct link from SR-510 north (near Mud Run) to SR-507 (near Cattlemans). Priority #6: Mosman Street / 1St Street (SR 507) Intersection Realignment. This City project would re-align both Mosman approaches to 1St Street to create a single intersection. Priority #7: Mosman Street Improvements. This project would widen Mosman Street to City Neighborhood Collector design standards. Priority #8: Solberg St /Mosman St Improvements (SR-510 to SR-507). This project would widen Mosman and Solberg Streets to City Neighborhood Collector design standards. Priority #9: Second Street Improvements (Yelm Ave to Mosman Ave). This project would improve Second Street to City Commercial Collector design standards. Transportation Engineering Northwest 1 p July 20, 2005 Crystal Springs Estates - Yelm, WA Traffic Impact Study Priority #10: Yelm Avenue West Improvements (Solberg St to 1St Street). This project includes widening Yelm Avenue to meet the City's Urban Arterial standards. These standards would include two 11-foot travel lanes, 8-foot sidewalks on both sides, a 10-foot median planting strip, and a 35 mph posted speed limit. Priority #14: Y-2 Corridor (SR 507/Five Corner Connector) -called Yelm Loop Segment 2. This corridor is planned to follow Segment 1 with a new east-west arterial road connection on the south side of the City between 1St Street and Yelm Avenue. Priority #15: Yelm Avenue / 93rd Avenue SE Intersection. This intersection would be realigned, also providing for roadway widening and safety improvements. Priority #16: Yelm Avenue / Killion Road Intersection. A new signalized intersection would be provided on Yelm Avenue at Killion Road to provide improved access on Killion Road north, and a new connection to the south. This project is part of the larger Y-3 Corridor Plan to have a new roadway extend from Yelm Avenue at Killion Road to the southwest to provide access to a residential development. School District Improvements on Yelm Ave. The school district will be widening Yelm Ave from just east of Burnett Road SE to west of Mountain View Road SE to provide a center two-way left-turn lane. This center turn lane would be included at the intersection of Mountain View Road SE. None of these improvements are assumed to be in place prior to 2007 when the project is expected to be occupied. Transportation Engineering Northwest l 1 )uly 20, 2005 Crystal Springs Estates - Yelm, WA DETERM[NAT[ON OF IMPACT Trip Generation Traffic Impact Study The trip generation for the proposed development, shown in Table 3, was based on average rate equations documented in the Institute of Transportation Engineers (ITE) Trip Generation Manual, 7th Edition for single family detached housing (LUC 210). The trip generation estimates also took into account one existing single-family home that would remain on-site for a net total of 22 single-family lots. Table 3. Crystal Springs Estates (Net 22 Lots) - Trip Generation Estimates) AM Peak Hour Trips PM Peak Hour Trips Daily Land Use LUC Total In Out Total In Out Trips Single Family ResidentialZ 210 17 4 13 23 14 9 220 Less Existing Trips3 210 -1 0 -1 -1 -1 0 -10 Net New Trips 16 4 12 22 13 9 210 1. Trip rates based on average rate equations in ITE Trip Generation Manual, 7 Edition, 2003. 2. Based on 23-tot Single Family Residential =ITE LU No. 210. 3. Less Existin Tri s based on I-lot Sin le Famil Residential =ITE LU No. 210. Based upon the trip generation results summarized in Table 3 above, on a typical weekday, the proposed development is anticipated to generate a net of 2.10 daily trips, with 16 trips occurring during the AM peak hour, and 22 during the PM peak hour. Trip Distribution and Assignment The distribution of PM peak hour project-generated traffic was based on information provided through conversations with the City of Yelm and existing travel patterns in the area. In general, the following distribution was used in the traffic analyses: • 40 % West and Northwest on Yelm Avenue (SR-510) • 55 % South and Southeast on 1St Street (SR-507), Yelm Avenue (SR-507), Canal Road, and View Drive. • 5% Local on Edwards Street. A more detailed distribution and assignment of net PM peak hour project- generated trips is also shown in Figure 5. Transportation Engineering Northwest 12 ]uly 20, 2005 Crystal Springs Estates - Yelm, WA Figure 5. PM Peak Hour Trip Distribution and Assignment Traffic Impact Study Transportation Engineering North~/est 13 July 20, 2005 Fi ure 5 Crystal Springs Transportation g Estates +~ Engineering PM Peak Hour Trip Northwest, ~~c Distribution and Assignment Yelm, Washington Traffic Itrg~act Study Crystal Springs Estates - Yelm, WA Traffic Impact Study Traffic Volume Impact Future traffic volumes with and without the development were estimated for PM peak hour conditions in the year 2007. Future traffic volumes at the study intersections were developed based on existing peak hour traffic counts increased to account for background growth. Based on discussions with the City of Yelm, a 4 percent annual growth rate was used to account for traffic growth in the area. In addition to the background growth rate, the following 3 pipeline projects were added to existing conditions to determine 2007 PM peak hour traffic volumes without the project: • Yelm Terra Plat would construct up to 97 single-family residential homes. • Tahoma Terra Phase 1 includes 89 single-family residential lots. Phase 2 includes 125 single-family residential lots, 20 condominiums/townhouses, an 8-fuel position gas station with car wash, and a 48,000 square foot medical-dental office building. • Green Village Subdivision would consist of up to 52 single-family homes. The weekday PM peak hour traffic volumes for year 2007 are shown on Figure 6. Adding the PM peak hour project trips (shown in Figure 5) to the future without- project traffic volumes (Figure 6), results in future traffic volumes with the project, as shown in Figure 7. Future traffic volume estimates are provided in Appendix C. Intersection LOS Analysis Level of service (LOS) analyses were conducted for weekday PM peak hour conditions with and without the development in year 2007 at the two study intersections. Future improvements listed in the City's Six Year TIP were not assumed in the 2007 analysis. The weekday PM peak hour intersection LOS analysis results for the two study intersections are summarized in Table 6. The table is set-up to illustrate the LOS results for future conditions without and with the proposed development. As shown in Table 6, all controlled movements at the unsignalized study intersections are anticipated to operate at LOS D or better during the PM peak hour with or without the project. Detailed LOS analysis worksheets for study intersections are provided in Appendix B. Transportatron Engineering Northwest 14 July 20, 2005 Crystal Springs Estates - Yelm, WA Figure 6. 2007 Without Project PM Peak Hour Traffic Volumes Traffic Impact Study I Project Site Canal Rd 1VW > iew Dr NW c :: w c in ~ .a o ~ ~ ~ O W - N Y a 92nd y 5 3 z 3 U ~ s w 3~3 Kn[_~. _,. ---- --~ I N 510 ;; ~~ 3 z rP~~ -~~~ ~___________ g _° R~.S Edwards St NW/Yelm Ave z ~ ,y ~.~ 0 X40 .,A ~ ~ ~y E\g'?O Berry Valley Rd ~.~ ~ ~ ~ ~~' ~~~ r~ .i ~ ~, 1b e L 5 N S ~, ~ ` sLy ~ hob ~a`a ~ 5~~~ O ~~ P~~P F ,~ ~D Pjlf' d ~ / ,\ ~.>>' ? 507 1f ~~ 507 ~~ Not to Scale Transportation Figure 6 Crystal Springs (~ Estates Engineering 2007 Without Project Northwest, i.i.c pM Peak Hour Traffic Volumes Yelm, Washington Traffic Impact Study Crystal Springs Rd/View a NW 2 0 3s 2 F o ~, ~ X14 vr~ it raw O~ ~ R 1 0 ~ 1 107 38 0 ~ ;t Transportation Engineering Northwest i s )uly 20, 2005 Crystal Springs Estates - Yelm, WA Figure 7. 2007 With Project PM Peak Hour Traffic Volumes Traffic Impact Study Project W Site -anal Rd NW ~ iew Dr NW c r W ~ N O '~ O W H Y ~ 92nd y S 3 ~~ z u ~ -- f c N 510 Y ~, ~~ 3 z rP~~ -~~~ ° I ° (( a ,~d~~~ ~!~ i Edwards St NW/Yelm Ave i S F,. jf Berry Valley Rd ____~.®.,~ ~ ~ \ `'~°/ ~ ~~' ~ rn S a ~ L h (1S ~C Of L -Y ~ 4jd N ~!' \`\ LP ~,' ~`~ V 507 .~ 507 a~ Not to Sale ` Fi ure 7 Crystal Springs !~ Transportation g Estates Engineering 2007 With Project Northwest, i.i.c pj„~ peak Hour Traffic Volumes Yelm, Washington Traffic Impact Study Crystal Springs RdNlew Dr NW ~ 2 2 38 2 <- 2 ~ 1 ~ I 2~ .~ 9 107 38 6~ ~ Transportation Engineering NortfiWest ] ( July 20, 2005 Crystal Springs Estates - Yelm, WA Traffic Impact Study Table 4. Crystal Springs Estates 2007 PM Peak Hour LOS Summary Without Project Without-Project Study Intersection LOSt DelayZ V/C3 LOS Delay V/C Unsignalized (stop controlled movements): 1. View Drive /Crystal Springs Road (Site Access) Eastbound -- -- -- A 9.2 0.01 Westbound A 9.8 0.03 B 10.0 0.04 Northbound Left A 7.3 0.00 A 7.3 0.01 Southbound Left A 7.5 0.00 A 7.5 0.00 2. Yelm Avenue / Edwards Street Eastbound Left B 10.2 0.05 B 10.2 0.06 Westbound Left A 9.7 0.01 A 9.7 0.01 Northbound C 16.9 0.06 C 16.9 0.06 Southbound D 25.5 0.21 D 31.2 0.26 1. LOS analyses are based on methodologies established in the 2000 Highway Capacity Manual. 2. Delay =average control delay per vehicle. 3. V/C =Volume to Capacity ratio. 4. All si als were assumed to be full actuated; s tits were o timized. Site Access Analysis Primary vehicular access would continue to be provided via an existing driveway onto Crystal Springs Road, west of its intersection with View Drive. This existing access roadway would be improved to meet City of Yelm access design standards for a Local Access Residential roadway and would continue to operate as the west leg of the Crystal Springs Road/View Drive intersection. This site access intersection would continue to consist of single lane approaches. Access roadway improvements on View Drive would consist of a parking lane, 6-foot planter strip, and rolled curb and gutter on both sides of the street with a 5-foot sidewalk on one side of the street. The internal roadway would provide adequate on-site, two-way circulation and fire and emergency vehicle access with the driveway entrance onto Crystal Springs Road. Sight Distance. The minimum stopping sight distance is 250 feet and entering sight distance is 490 feet fora 35 mph design speed (10 mph above the posted speed limit of 25 mph) based upon guidelines in American Association of State Highways and Transportation Officials (AASHTO). On Crystal Springs Road, sight distance is met to both the north and south with measured field sight distances in excess of 500 feet. Transportation Engineering Northwest 1'] July 20, 2005 Crystal Springs Estates - Yelm, WA Traffic Impact Study Vehicle Access Impacts. All controlled movements at the site access intersection of Crystal Springs Road /View Drive are expected to operate at LOS B or better and experience less than a 1-vehicle queue for entering and exiting vehicles during the PM peak hour. Non-Motorized Impacts Sidewalks are proposed on one side of the new Local Access Residential road (View Drive) within the proposed development to accommodate pedestrians and separate them from motorists in the travel lanes. Half-street frontage improvements will be provided on the western half of Crystal Springs Road along the property frontages to meet City standards for a Neighborhood Collector. The half-street frontage will include new curb, gutter, 7-foot planter strip, and 5-foot sidewalk. Public Transportation Impacts Existing transit services are provided on Saturdays only with a bus stop on View Drive, east of Mountain View, approximately 200 feet from the proposed development. Although service is not provided on a regular basis, it should be noted that the proposed development would consist of residents who rely primarily on personal automobiles for their means of transportation, especially in a rural area. Therefore, no public transportation service improvements are anticipated as part of this development. _~ Transportation Engineering Northwest 1 g July 20, 2005 w,,~- Crystal Springs Estates - Yelm, WA Traffic Impact Study MITIGATION MEASURES The following measures are identified to mitigate the traffic impacts of the Crystal Springs Estates residential development. Traffic Impact Fee. The City of Yelm requires payment of a traffic impact fee based on the number of PM peak hour trips generated by new development. The City has adopted a Transportation Facilities Charge (TFC) of $750.00 per PM peak hour trip to pay for projects on the City's six-year TIP. The Crystal Springs Estates development, with 23 proposed single-family residential lots (net of 22 lots), would be subject to a $16,500 traffic impact fee based upon 22 PM peak hour trips. Non-Motorized Improvements. New rolled curb/gutter/sidewalk will be provided on one side of the proposed internal plat road (View Drive), and half- street frontage improvements will be provided on the western half of Crystal Springs Road along the property frontages to meet City standards for a Neighborhood Collector. The half-street frontage will include new curb, gutter, 7-foot planter strip, and 5-foot sidewalk. Transportation Engineering Northwest ]9 ]uly 20, 2005 Appendix A Traffic Counts P_,~ .,~ r _„, w~ ar.,r .w fiwi t.~« Peak Hour Summary ~. ~. Mark Skaggs (206) 251-0300 Crystal Springs St ~ View Dr 4:45 PM to 5:45 PM Tuesday, June 28, 2005 y `. ~y .~ ~ 37 101 V 0 35 2 M ~ y View Dr R 2 E a 15 ~~~ ~ 13 w~ s 0 ~ ^0 0 ~ 37 o y View Dr R '~' 71 1 99 35 ~ 135 ~ w U v~ Approach PHF HV% Volume EB 0.00 0.0% 0 WB 0.63 0.0% 15 NB 0.94 0.7% 135 SB 0.66 0.0% 37 Intersection 0.94 0.5% 187 Count Period: 4:00 PM to 6:00 PM Peak Hour Summary ~- Mark Skaggs (206)251-0300 Edwards St 8~ Yelm Ave 5:00 PM to 6:00 PM Tuesday, June 28, 2005 3 a 63 89 W 28 T 28 M ~ y Yelm Ave R sT sss ~. 540 611 ~ ~ 4 fY/' S 22 ~ 628 803 ~ 646 3 y Ye/m Ave R '~' 71 1 0 15 14 16 h ~a ~a 3 a W Approach PHF HV°~ Volume EB 0.92 4.0% 628 WB 0.86 2.1% 611 NB 0.67 0.0% 16 SB 0.79 3.2% 63 Intersection 0.90 3.0% 1,318 Count Period: 4:00 PM to 6:00 PM Total Vehicle Summary ~ ~ ~ Mark SkaOgs (206) 251 0300 Edwards St 8l: Yelm Ave Tuesday, June 28, 2005 4:00 PM to 6:00 PM 15-Minute Interval Summary 4:00 PM to 8:00 PM o m In Out 63 89 ~ 28 7 28 a ~ ,,, 4 HV 2.7% PHF 0.86 22 J `Y L 67 Out 569 671 M In 628 603 • s E • 540 646 Out 3-3 r ~4 HV 4.0°h PHF 0.92 'h r ~ e ~ 7 0 75 Out In = _ 14 16 0- Peak Houi Summary 5:00 PM to 8:00 PM Mtervat Start NorthbaurM Edwards St Southbound Edwards St Eastbound Yelm Ave Westbound Ye_im Ave Interval Time L T R hN L 1 T i R ': FiV L ~ T ~ R i HV L i T ': R~ F7V TaW 04:00 PM 2 2 0 0 7 0 i 14 { 0 5 ; 145 2 8 0 102 i 10 t 3 289 04:75 PM 0 0 1 0 4 ~ 1 4 i 0 3 ~ 142 ~ 0' 10 3 151 i 10 ? 4 319 04:30 PM 04:45 PM 2 0 0 1 4 1 0 0 17 5 5 2 11 '~ 1 3 0 2 125: 2 8 2 ~ 147 2 f0 2 i 125 13 9 1 745 i 17 10 296 327 05:00 PM 0 0 4 0 6 3 ~ 8 ~ 7 5 i 744 ~ 0 9 1 ! 725 18 ~ 2 314 05:15 PM 0 0 6 __ 0 7 ~ 0 i 5 ! 0 6 ! 745: 0~-10 7 ? 729: 15 i 5 314 05:30 PM 1 0 3 0 10 ' 2 8 i 0 6 149: 2 3 0 ~ 126 18 3 325 05:45 PM 0 0 2 0 5 2 7 1 5 ~ 765 ' 1 3 2 760 16 3 365 Trial Surve 5 3 23 0 67 14 54 4 34 ~ 1,162 ~ 9 ! 61 10 ~ 1,063 ~ 177 39 2,549 Peak Hour Summary 5:00 PM to 8:00 PM NorlhbourM SouMbound Fasl6anW Westbound By Approach - . --- ....Edwards 5[ Edwards S< Yelm Ave _ YNm Ave Total In Out Total HV In i Out l Told HV In ~ Out 'Total ; HV In ! Out Total ~ HV Voume 16 14 30 0 63 ; 89 i 152 ~ 2 628 569 1,197 25 611 ~ W6 1,257 t 73 1,318 %F1V 0.0 % 32% 4.0% 2.1% 3.0% PHF 0.67 0.79 0.92 0.86 0.90 Northbound Southbound Eastbound Westbound By Movement Edwards S[ Edvsrds Sf Yelm Ave Yelm Ave ~ Tofal L T R To[al L ~ T ': R lTotal L T i R :Total T i R iiotal L Volume 1 0 15 16 28 ! 7 28 '63 22 ~ 603 ~ 3 :628 4 ~ 540 I 67 :611 1,318 __-_ PHF _. __ 0.25 __-_ 0.00 __-_ 0.63 - 0.67 _-_ ~. Y_-_t. ____ 0.70 0 58 ~ 0.88 .0.79 _ _ _- .-__4__ . _.. 0.92 0.91 i 0 38 .0.92 _Y-___....r _~ 0 50 O.B4 0 43 ;0.86 - _ 0.90 Rolling Hour Summary d•M PM M R•M DM Interval Stag NorMbound Edwards St SouthbourM Edwards St Eastbound Velm Ave Westbound Yelm Ave bHerval Time L T R HV L '•. T! R~ HV L T; R F1V L T E R s HV Total 0400 PM 4 3 8 0 33 -~. 7 26 l 2 12 559: 6 i 36 6 i 523 i 14 i 26 1,237 04:15 PM 2 _ __ 1 _ 72 0 _ 32 f 70 ~ 20 -'-- 3 12~ 558 ~ 4 j 37 A 7 ~ 546 ! 52 25 1,256 04.30 PM 04:45 PM 2 1 1 1 17 76 0 0 35 ~~ 9 27 1 34_...~ 6 :.. __- ~. __- 24 ~ 7 15 561 ~ 4 -. 3T 19 585 4 ._____ -___ :. -. i 32 5 524 57 26 ~___. __ _. y...__- 3 525 62 ZO 1,257 ___ ____ 1,260 05:00 PM 1 0 15 0 28 ; 7 i 28 ~ 2 22 603 ~: 3 l 25 4 :~ 540 67 1 13 1,318 Appendix B Intersection LOS Resu Its 2005 Existing HCS2000: Unsignalized Intersections Release 4.1d TWO-WAY STOP CONTROL SUMMARY Analyst: JGT Agency/Co.: TENW Date Performed: 7/12/2005 Analysis Time Period: PM Peak Intersection: View Dr/Access/Crystal Spr ings Jurisdiction: City of Yelm Units: U. S. Customary Analysis Year: 2005 Existing Project ID: #2489 Crystal Springs Estates East/West Street: View Drive/Site Access North/South Street: Crystal Springs Street Intersection Orientation: NS Stu dy period (hrs): 0.25 Vehicle Volumes and Adjustments Major Street: Approach Northbound Southbound Movement 1 2 3 14 5 6 L T R I L T R Volume 4 92 44 4 56 0 Peak-Hour Factor, PHF 1.00 1.00 1.00 1.00 1.00 1.00 Hourly Flow Rate, HFR 4 92 44 4 56 0 Percent Heavy Vehicles 1 -- -- 0 -- -- Median Type/Storage Undivided / RT Channelized? Lanes 0 1 0 0 1 0 Configuration LTR LTR Upstream Signal? No No Minor Street: Approach Westbound Eastbound Movement 7 8 9 I 10 11 12 L T R I L T R Volume 4 0 4 0 0 0 Peak Hour Factor, PHF 1.00 1.00 1.00 1.00 1.00 1.00 Hourly Flow Rate, HFR 4 0 4 0 0 0 Percent Heavy Vehicles 0 0 0 0 0 0 Percent Grade (o) 0 0 Flared Approach: Exists?/Storage No / No / Lanes 0 1 0 0 1 0 Configuration LTR LTR Delay, Queue Length, and Level of Service Approach NB SB Westbound Eastb ound Movement 1 4 1 7 8 9 I 10 1 1 12 Lane Config LTR LTR I LTR I L TR v (vph) 4 4 8 0 C(m) (vph) 1555 1461 852 v/c 0.00 0.00 0.01 95$ queue length 0.01 0.01 0.03 Control Delay 7.3 7.5 9.3 LOS A A A Approach Delay 9.3 Approach LOS A HCS2000: Unsignalized Intersections Release 4.1d TWO-WAY STOP CONTROL SUMMARY Analyst: Agency/Co.: TENW Date Performed: 7/1 2/2005 Analysis Time Period: PM Peak Intersection: SR 510/Yelm Ave/Ed wards St Jurisdiction: Cit y of Yelm/WSDOT Units: U. S. Customary Analysis Year: 2005 Existing Project ID: #2489 Crysta l Springs Estat es East/West Street: SR 510/Yelm Avenue North/South Street: Edwards Street Intersection Orientation: EW Study period (hrs): 0.25 Vehicle Volumes an d Adjustme nts Major Street: Approach Eastbound Westbound Movement 1 2 3 ~ 4 5 6 L T R ( L T R Volume 20 660 4 8 640 64 Peak-Hour Factor, PHF 1.00 1.00 1.00 1.00 1.00 1.00 Hourly Flow Rate, HFR 20 660 4 8 640 64 Percent Heavy Vehicles 4 -- -- 2 -- -- Median Type/Storage TWLTL / 1 RT Channelized? Lanes 0 1 0 1 1 0 Configuration LTR L TR Upstream Signal? No No Minor Street: Approach Northbound Southbound Movement 7 8 9 ~ 10 11 12 L T R ~ L T R Volume 4 0 8 20 8 28 Peak Hour Factor, PHF 1.00 1.00 1.00 1.00 1.00 1.00 Hourly Flow Rate, HFR 4 0 8 20 8 28 Percent Heavy Vehicles 0 0 0 3 3 3 Percent Grade (%) 0 0 Flared Approach: Exists? /Storage No / N o / Lanes 0 1 0 1 1 0 Configuration LTR L TR Delay, Queue Length, and Level o f Service Approach EB WB Nor thbound Southbound Movement 1 4 ~ 7 8 9 ~ 10 11 12 Lane Config LTR L ~ LTR ~ L TR v (vph) 20 8 12 20 36 C(m) (vph) 885 925 345 239 387 v/c 0.02 0.01 0.03 0.08 0.09 95a queue length 0.07 0.03 0.11 0.27 0.31 Control Delay 9.2 8.9 15.8 21.4 15.3 LOS A A C C C Approach Delay 15.8 17 .5 Approach LOS C C 2007 Without-Project HCS2000: Unsignalized Intersections Release 4.1d TWO-WAY STOP CONTROL SUMMARY Analyst: Agency/Co.: TENW Date Performed: 7/12/2005 Analysis Time Period: PM Peak Intersection: View Dr/Access/Crystal Springs Jurisdiction: City of Yelm Units: U. S. Customary Analysis Year: 2007 without Project Project ID: #2489 Crystal Springs Estates East/West Street: View Drive/Site Access North/South Street: Crystal Springs Street Intersection Orientation: NS Study period (hrs): 0.25 Vehicle Volumes and Adjustments Major Street: Approach Northbound Southbound Movement 1 2 3 1 4 5 6 L T R I L T R Volume 2 107 38 2 38 0 Peak-Hour Factor, PHF 0.94 0.94 0.94 0.66 0.66 0.66 Hourly Flow Rate, HFR 2 113 40 3 57 0 Percent Heavy Vehicles 1 -- -- 0 -- -- Median Type/Storage Undi vided / RT Channelized? Lanes 0 1 0 0 1 0 Configuration LTR LTR Upstream Signal? No No Minor Street: Approach Westbound Eastbound Movement 7 8 9 I 10 11 12 L T R I L T R Volume 14 0 2 0 0 0 Peak Hour Factor, PHF 0.63 0.63 0.63 1.00 1.00 1.00 Hourly Flow Rate, HFR 22 0 3 0 0 0 Percent Heavy Vehicles 0 0 0 0 0 0 Percent Grade (o) 0 0 Flared Approach: Exists?/Storage No / No / Lanes 0 1 0 0 1 0 Configuration LTR LTR Approach Movement Lane Config v (vph) C (m) (vph) v/c 95o queue length Control Delay LOS Approach Delay Approach LOS Delay, Queue Length, and Level of Service NB SB Westbound Eastbound 1 4 1 7 8 9 I 10 11 12 LTR LTR I LTR I LTR 2 3 25 0 1554 1440 777 0.00 0.00 0.03 0.00 0.01 0.10 7.3 7.5 9.8 A A A 9.8 A HCS2000: Unsignalized Intersections Release 4.1d TWO-WAY STOP CONTROL SUMMARY Analyst: JGT Agency/Co.: TENW Date Performed: 7/12/2005 Analysis Time Period: PM Peak Intersection: SR 510/Yelm Ave/Edwards St Jurisdiction: City of Yelm/WSDOT Units: U. S. Customary Analysis Year: 2007 Without Project Project ID: #2489 Crystal Springs Estates East/West Street: SR 510/Yelm Avenue North/South Street: Edwards Street Intersection Orientation: EW Study period (hrs): Vehicle Volumes and Adjustments Major Street: Approach Eastbound Westbound Movement 1 2 3 ~ 4 5 6 L T R ~ L T R Volume 37 808 3 4 720 72 Peak-Hour Factor, PHF 0.92 0.92 0.92 0.86 0.86 0.86 Hourly Flow Rate, HFR 40 878 3 4 837 83 Percent Heavy Vehicles 4 -- -- 2 -- -- Median Type/Storage TWLTL / 1 RT Channelized? Lanes 0 1 0 1 1 0 Configuration LTR L TR Upstream Signal? No No Minor Street: Approach Northbou nd Southbou nd Movement 7 8 9 ~ 10 11 12 L T R ~ L T R Volume 1 0 16 30 8 41 Peak Hour Factor, PHF 0.86 0.86 0.86 0.86 0.86 0.86 Hourly Flow Rate, HFR 1 0 18 34 9 47 Percent Heavy Vehicles 0 0 0 3 3 3 Percent Grade (o) 0 0 Flared Approach: Exists?/Storage No / No / Lanes 0 1 0 1 1 0 Configuration LTR L TR Delay, Queue Length, and Level of Service Approach EB WB No rthbound Sou thbound Movement 1 4 ~ 7 8 9 ~ 10 11 12 Lane Config LTR L ~ LTR ~ L TR v (vph) 40 4 19 34 56 C(m) (vph) 734 767 322 153 300 v/c 0.05 0.01 0.06 0.22 0.19 95o queue length 0.17 0.02 0.19 0.81 0.67 Control Delay 10.2 9.7 16.9 35.1 19.7 LOS B A C E C Approach Delay 16.9 25.5 Approach LOS C D 0.25 2007 With-Project HC52000: Unsignalized Intersections Release 4.1d TWO-WAY STOP CONTROL SUMMARY Analyst: Agency/Co.: TENW Date Performed: 7/12/2005 Analysis Time Period: PM Peak Intersection: View Dr/Access/Crystal Springs Jurisdiction: City of Yelm Units: U. S. Customary Analysis Year: 2007 With Project Project ID: #2489 Crystal Springs Estates East/West Street: View Drive/Site Access North/South Street: Crystal Springs Street Intersection Orientation: NS Study period (hrs): 0.25 Vehicle Volumes and Adjustments Major Street: Approach Northbound Southbound Movement 1 2 3 ~ 4 5 6 L T R ~ L T R Volume 9 107 38 2 38 2 Peak-Hour Factor, PHF 0.94 0.94 0.94 0.66 0.66 0.66 Hourly Flow Rate, HFR 9 113 40 3 57 3 Percent Heavy Vehicles 1 -- -- 0 -- -- Median Type/Storage Undivided / RT Channelized? Lanes 0 1 0 0 1 0 Configuration LTR LTR Upstream Signal? No No Minor Street: Approach Westbound Eastbound Movement 7 8 9 ~ 10 11 12 L T R ~ L T R Volume 14 2 2 1 2 6 Peak Hour Factor, PHF 0.63 0.63 0.63 0.90 0.90 0.90 Hourly Flow Rate, HFR 22 3 3 1 2 6 Percent Heavy Vehicles 0 0 0 0 0 0 Percent Grade (%) 0 0 Flared Approach: Exists?/Storage No / No / Lanes 0 1 0 0 1 0 Configuration LTR LTR Delay, Queue Length, and Level of Service Approach NB SB We stbound East bound Movement 1 4 ~ 7 8 9 ~ 10 11 12 Lane Config LTR LTR ~ LTR ~ LTR v (vph) 9 3 28 9 C(m) (vph) 1550 1440 741 874 v/c 0.01 0.00 0.04 0.01 95o queue length 0.02 0.01 0.12 0.03 Control Delay 7.3 7.5 10.0+ 9.2 LOS A A B A Approach Delay 10.0+ 9.2 Approach LOS B A HCS2000: Unsignalized Intersections Release 4.1d TWO-WAY STOP CONTROL SUMMARY Analyst: Agency/Co.: TENW Date Performed: 7/12/2005 Analysis Time Period: PM Peak Intersection: SR 510/Yelm Ave/Edwa rds St Jurisdiction: City of Yelm/WSDOT Units: U. S. Customary Analysis Year: 2007 With Project Project ID: #2489 Crystal Springs Estates East/West Street: SR 510/Yelm Avenue North/South Street: Edwards Street Intersection Orientation: EW Study period (hrs): 0.25 Vehicle Volumes and Adjustments Major Street: Approach Eastbound Westbound Movement 1 2 3 1 4 5 6 L T R I L T R Volume 42 808 3 4 720 75 Peak-Hour Factor, PHF 0.92 0.92 0.92 0.86 0.86 0.86 Hourly Flow Rate, HFR 45 878 3 4 837 87 Percent Heavy Vehicles 4 -- -- 2 -- -- Median Type/Storage TWLTL / 1 RT Channelized? Lanes 0 1 0 1 1 0 Configuration LTR L TR Upstream Signal? No No Minor Street: Approach Movement Northbound 7 8 L T 9 R I 10 I L Southbound 11 T 12 R Volume 1 0 16 45 8 32 Peak Hour Factor, PHF 0.86 0.86 0.86 0.86 0.86 0.86 Hourly Flow Rate, HFR 1 0 18 52 9 37 Percent Heavy Vehicles 0 0 0 3 3 3 Percent Grade (%) 0 0 Flared Approach: Exists?/Storage No / No / Lanes 0 1 0 1 1 0 Configuration LTR L TR Delay, Queue Length, and Level of Service Approach EB WB Northbound Southbound Movement 1 4 1 7 8 9 I 10 11 12 Lane Config LTR L I LTR I L TR v (vph) 45 4 19 52 46 C(m) (vph) 731 767 322 150 289 v/c 0.06 0.01 0.06 0.35 0.16 95a queue length 0.20 0.02 0.19 1.43 0.56 Control Delay 10.2 9.7 16.9 41.2 19.8 LOS B A C E C Approach Delay 16.9 31.2 Approach LOS C D Appendix C Future Traffic Volume Estimates ~ W C e Oi O .~' W v ,~ a0 Sa tnr •p ~ O O x 7 N N W A p p r W W ~ } } L Ot d Y C ~ O ~ 3 ~. 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