Loading...
HomeMy WebLinkAboutAttachmt 7 - Sec 4 Pgs 106-136 Table 16. Intersection Level of Service under Buildout Conditions Signalized Intersections A.M. Peak Hour P.M. Peak Hour ill v/e LOS v/e LOS 1 Dougherty Road /Dublin Boulevard 0.76 C 0.92 E 2 Hacienda Drive/I-580 Eastbound 0.73 C 0.70 B Ramps 3 Hacienda Drive/I-580 Westbound 0.82 D 0.50 A Ramps 4 Hacienda Drive/Dublin Boulevard 0.67 B 0.98 E 5 Hacienda Drive/Central Parkway 0.57 A 0.58 A 6 Hacienda Drive/Gleason Drive 0.32 A 0.51 A 7 Santa Rita/I-580 Eastbound 0.89 D 0.89 D Ramps/Pimlico Drive 8 Tassajara Road/I-580 Westbound 0.78 C 0.83 D Ramps 9 Tassajara Road/Dublin Boulevard 0.65 B 0.82 D 10 Tassajara Road/ Central Parkway 0.67 B 0.65 B 11 Tassajara Road/ Gleason Drive 0.67 B 0.73 C 12 Tassajara Road/South Dublin Ranch 0.70 B 0.64 B Drive 13 Tassajara Road/North Dublin Ranch 0.66 B 0.52 A Drive 14 Tassajara Road/ Quarry Lane School 0.64 B 0.50 A Driveway 15 Tassajara Road/Northern Project 0.64 B 0.62 B Access 16 Tassajara Road/Fallon Road 0.27 A 0.47 A 17 El Charro Road/I-580 Eastbound 0.50 A 0.74 C Ramps 18 Fallon Road/I-580 Westbound Ramps 0.51 A 0.73 C 19 Fallon Road/Dublin Boulevard 0.64 B 0.86 D 20 Fallon Road/ Gleason Drive 0.30 A 0.43 A 21 Fallon Road/ Antone Way 0.24 A 0.28 A 22 Hacienda Drive / Martinelli 0.54 A 0.89 D Way / Hacienda Crossings Source: T JKM Transportation Consultants, 2004 Note: vlc = volume to capacity ratio; LOS = Level of Service; X.X (X.X) = Overall Intersection Delay or LOS (Minor Movements Dublin Ranch West Draft Supplemental EIR City of Dublin Page 106 November 2004 As shown in Table 16, twenty of the 22 study intersections are expected to operate acceptably during the AM and PM peak. hours under Buildout. The remaining two intersections of Dublin Boulevard/Dougherty Road and Dublin Boulevard/Hacienda Drive are expected to operate below LOS D during the p.m. peak. hour despite the planned roadway improvements. Dublin Boulevard/Dougherty Road. The Eastern Dublin EIR identified significant impacts to this intersection based on potential LOS F operations. (Impact 3.3/F.) Mitigation measure 3.3/6.0 called for future construction of additional lanes to maintain LOS D operations, with fair share funding contributions from new development in Eastern Dublin. The Oty has adopted an Eastern Dublin Traffic Impact Fee in compliance with this mitigation. The Project is subject to this fee, and other adopted traffic impact fees. As shown in Table 16, above, however, the intersection is projected to operate at LOS E with planned intersection improvements. This reduction in intersection operations from the Eastern Dublin EIR would be a significant supplemental impact. As mitigation, the Project traffic analysis recommends installation of a fourth exclusive through lane on eastbound Dublin Boulevard. However, this improvement is not feasible given the physical constraints at this intersection. Thus, intersection operations would be a supplemental significant unavoidable impact. Dublžn Boulevard/Hacienda Drive. The Eastern Dublin EIR identified significant cumulative impacts to this intersection based on potential LOS F operations, noting that no further widening of the intersection would be feasible. (Impact 3.3/M.) Mitigation measure 3.3/13.0 called for the City to participate in regional transportation studies and funding programs. The City has so participated, and the Project will be subject to adopted regional traffic fees. As shown in Table 16 above, the intersection is projected to operate at LOS E with planned intersection improvements; this is an improved operation compared to the LOS identified in the Eastern Dublin EIR. As mitigation, the Project traffic analysis recommends installation of a fourth exclusive through lane on eastbound Dublin Boulevard. Consistent with the Eastern Dublin EIR, and as noted above, this improvement is not feasible given the physical constraints at this intersection. With the slightly improved operation at this intersection, there are no significant impacts beyond those identified in the Eastern Dublin EIR, and thus no supplemental impacts would occur. Supplemental Impact TRA-3. Cumulative increase of Project related traffic on adjacent freeways. Development in Eastern Dublin was identified as a significant unavoidable cumulative impact in the Eastern Dublin EIR (reference impact IM 3.3/B, 1-580 freeway, 1-680 Freeway-Hacienda). The cumulative daily traffic volumes projected in the Eastern Dublin EIR (reference Table 3.3-9) on the 1-580,1-680 freeways are close to the year 2003 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 107 November 2004 volumes on the two freeways (per the 2003 Caltrans Traffic Volumes on California State Highways). Evaluation of freeway levels of service is a different process than intersection levels of service. Level of service for freeways is based upon peak. hour traffic volumes (number of passenger cars per hour). In practice as in theory, volume, density and speed are directly correlated, and the analyst can calculate anyone of these factors knowing the other two. Traffic flow is used as the basis for freeway levels of service and for calculating the impacts of the Project on 1-580 and 1-680 operations in 2025. The forecasted Year 2025 volumes were based on the 1-580 and 1-680 mainline freeway operation analysis obtained from the Dublin Transit Center P A 00-013 Final Environmental Impact Report (September 2002), which was certified by the Dublin City Council in November 2002. Table 17 summarizes the forecasted volumes and expected levels of service for two scenarios in 2025: 1) conditions without the Project, and 2) conditions with the Project. Table 17. Summary of Freeway Analysis Capacity F E D E E D F D F D D E Even without the proposed Project, the study mainline segments along 1-580 and 1-680 in the vicinity of the Project site would operate unacceptably under Year 2025 conditions. Consistent with the adopted Eastern Dublin mitigation measures for freeway impacts, the Project will be required to pay for its proportionate share of impacts to 1-580 and 1-680, by payment of Tri-Valley Transportation Development (TVTD) Fees to construct planned freeway Dublin Ranch West Draft Supplemental EIR Page 108 City of Dublin November 2004 improvements, including HOV lanes, auxiliary lanes, and interchange improvements. The Project will also pay for its proportionate share toward public transportation improvements to help reduce traffic on the freeways and other roadways in the Tri- Valley Area, by payment of the TVTD Fee; two of the improvements to be funded by the TVTD Fees are the West Dublin BART Station and the Express Bus Service from Livermore to the East Dublin BART station. The Project's contribution of additional traffic to local freeways would be less than originally analyzed in the Eastern Dublin EIR, since fewer trips would be generated from proposed development than under the approved General Plan and Eastern Dublin Specific Plan. There are no significant freeway impacts beyond those identified in the Eastern Dublin EIR, and thus no supplemental freeway impacts would occur. Supplemental Impact TRA-4. Impacts on Tassajara Road roadway segments. The Eastern Dublin EIR identified significant cumulative impacts along Tassajara Road. (Impact 3.3/N.) Adopted Mitigation Measure 3.3/14.0 called for the Oty of Dublin to reserve right-of-way for up to six future lanes and called for development to contribute proportionately to costs of improving the roadway. In July, 2004, the City of Dublin approved an ultimate precise alignment for the widening of Tassajara Road to six travel lanes between Shadow Hills Drive and the northerly Dublin City limit line. The adopted Eastern Dublin TIP is based on programmed improvements to widen Tassajara Road to six lanes, including four inside lanes to be funded through the Eastern Dublin TIP and two outside lanes to be constructed by adjacent developments as part of their frontage improvements. A roadway segment analysis was conducted to determine the number of through lanes that would be needed to have various segments of Tassajara Road operate at acceptable levels of service for all study scenarios. The average daily traffic (ADT) volumes for existing and future scenarios were estimated by assuming that the p.m. peak hour volumes were 10 percent of their daily volumes. The following three roadway segments were analyzed: 1. Tassajara Road between North Dublin Ranch Drive and Project Northern Access, Existing ADT - 9,050 vpd Existing plus Approved ADT-10,430 vpd Existing plus Approved plus Project ADT-19,160 vpd Buildout ADT - 34,490 vpd 2. Tassajara Road between Project Northern Access and Fallon Road Existing ADT- 8,990 vpd Existing plus Approved ADT-10,370 vpd Existing plus Approved plus Project ADT- 10,980 vpd Buildout ADT- 24,900 vpd 3. Tassajara Road between Fallon Road and Dublin I County Limit Dublin Ranch West Draft Supplemental EIR City of Dublin Page 109 November 2004 Existing ADT - 8,990 vpd Existing plus Approved ADT - 10,370 vpd Existing plus Approved plus Project ADT-10,980 vpd Buildout ADT - 31,270 vpd The roadway analysis indicates that roadways near the Project area would not accommodate Project and Buildout traffic. This would be a potentially significant supplemental impact. The roadway segment analysis concludes that Tassajara Road would need to be widened as follows to accommodate anticipated traffic. . Tassajara Road between North Dublin Ranch Drive and Project Northern Access would need to be widened to four lanes under the Existing plus Approved plus Project conditions. . Tassajara Road between North Dublin Ranch Drive and Project Northern Access would need to be widened to six lanes under the Buildout conditions. Tassajara Road between Project Northern Access and Fallon Road would need to be widened to four lanes under the Buildout conditions. However, this segment of Tassajara Road should be improved to six lanes under Buildout conditions to provide for continuity of traffic flow on Tassajara Road to the Dublin/County limit. Tassajara Road between Fallon Road and Dublin/ County Line would need to be widened to six lanes under the Buildout conditions. The following measure is recommended to reduce the above impact to a less- than-significant level Supplemental Miti&ation Measure SM- TRA-l. The Project developer shall dedicate right-of-way along the Project frontage and widen Tassajara Road to four lanes between North Dublin Ranch Drive and Project Northern Access to improve roadway segment s near the Project. Supplemental Impact TRA-5. Potential traffic safety impacts. Proposed development of the Dublin Ranch West site would add additional traffic onto Tassajara Road. Two access points are proposed as shown in Exhibit 11. The addition of anticipated traffic could result in a potentially significant supplemental impact with regard to traffic safety and design issues. Adherence to the following measures would reduce traffic safety issues to a less- than-significant level. Supplemental Miti&ation Measure SM- TRA-2. The Stage 1 Development Plan for the Dublin Ranch West Project shall include the following safety features. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 110 November 2004 a) Install traffic signals at the two Project access roadways due to safety considerations along Tassajara Road. b) Provide an eastbound right-turn capacity on the Project main access roadway at Tassajara Road to accommodate vehicles during the a.m. peak hour. c) Provide northbound left-turn capacity from Tassajara Road onto the Project main access roadway, considering anticipated traffic movements to access the Project site during the p.m. peak hour. d) Provide an adequate northbound left-turn lane from Tassajara Road onto the Project southern access roadway, considering anticipated turning movements during the p.m. peak hour. e) Provide an appropriate southbound right-turn pocket with an adequate taper on Tassajara Road at both access roadways due to safety consideration. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 111 November 2004 Intersection #1 DublinJDougherty ~~ --..,. ~,....s:2. ;;;2) ~ ~ 179 (420) ..,. ...... M 600 (556) ~ '" ,.193 (331) 31 (88)-" . i"" 336 (656 õ,::";::' 398 (564)"""\ ~¡§. "''''- _NO .... """ Intersection #7 nta RitalJ.580 EB Ramp/Pimlico 0....'" 0>........ ~::. "''''''' ~~;: ~600(610) ~ '" ,.145 (123) 262 (271)-'' 'i"" 138 (241 g¡ f6 515 (385)"""\ ¿~ o ~ Intersection #13 TassajaralN. Dublin Ranch <i" '" §:~§: ~6 (6) -"'N +1(0) ~ '" "101 (39) 0(1 .,.... 4 (4~ :!:1ßrf "'...- -..,. 0..,. ¡:3 Intersection #19 FallonlDublin Intersection #2 HaciendaJ1..580 EB Ramps _G' 0'" ..,.'" M- -'" 0'" "'''' ~ 591 (542)-" . i"" 1,037 (361~ íif~ ~~ :::..... è'b~ Intersection #8 TassajaraJl.580 we Ramps ::='(\; N.... ~~ ~~ ~293 (334) ~ ,,555 (473) 'i"" Lñô "'..,. ~~ M- ....N "'.... Intersection #14 Tassajara/Quany Lane School G' '" "'- -N "'- ~~ ~25 (3) + '" ,.90 (7) ~'i"" ã):;t 0- "'''' -'" '" ~ Intersection #20 FallonlGleason Intersection #3 HaciendaIJ.580 we Ramps "'.... "'''' !£..t::. ¡i¡;; ~397 (202) ~ ,,644 (239) 'i"" @(;J "'''' ~.....- - N'" 011"> CDM Intersection #9 Tassajara/Dublin ã>~ ......,. ;;;;;; ¡;¡- ~2 (7) ;:¡;¡;¡j" 7 (17) ~ '" "14 (53) 65 (255)-" . i"" 6 (11 r::ë\ì<i" 165 (618)"""\ ¡:; ¡;¡;::- -..,. 11">0 11">- N'" Intersection #15 TassajaralProject Driveway Intersection #4 HaciendalDllblin Intersection #5 Hacienda/Central _CD ..,...,.- ....11">'" m¡~ ~41 (18) ;:N;: +268 (303) ~ '" ,.195 (140) 80 (96)-" ~ . i"" 159 (715 LñLñã> 109 (487)"""\ 12~ g¡ NO'" 11">"'.... "'11"> <i" N _M ~¡¡:!: ~4 (6) -N_ +14(6) ~ '" ,.133 (43) 2 (16)-" . i"" 1 (8 ã>ã>- 7 (166)"""\ :::.¡!¡g 11">-'" -..,.... NN '" Intersection #11 Tassajara/Gleason Inter.;ection #1 0 Tassajara/Central ã> '" ... ~N ;;';;' ~2 (3) , '" ,,1 (0) 8(1~ +i"" 6);::-6' -11">- 0....'" -- c;; ... Intersection #16 TassajaralFallon Extension _ã; CDM ~ N'" -.... NCD ~ 30 (236)-'' 28 (64~ . Lñr::- "'II"> -.... N- "'''' C;; Intersection #17 EI Charro/l·580 EB Ramps ++ ~ 2? Intersection #21 Fallon/Antone +++ - - - Intersection #22 HaciendaIHacienda Crossing CD .... 0.._ -'" -CD "'- ;1;¡;: ~23 (42) + '" ,.137 (356) 'i"" ;::s¡ ~ "';:J ~- ~ <$ :: " <:' ,g Õ ü ,,:. <Þ Æ ¡¡; '" "" ~ .z 51 <: ð " " õõ ~ .. North Not to Scale LEGEND . Existing Intersection o Future Intersection .. Project - Existing Road . -- -- Future Road XX AM Peak Hour Volume (XX) PM Peak Hour Volume DUBUN BLVD. GLEASON DR. 6 SOURCE: TJKM Transportation Consultants 9/7/2004. CITY OF DUB UN DUBUN RANCH WEST SUPPLEMENTAL ENVIRONMENTAL IMPACT REPORT ~- _M ~ N.... ..,.N Ir... 82 (16)-'' it!: 6(10 "'... 63 (18)"""\ !2.t::. N_ "'N -;;. -~'if 16-'_", '",-:~"""" -, -, , ,,\ ., .$~ ~.. , , ) / ,./ / " °llBuN 8l"-t) Intersection #6 HaciendalGleason +52 (35) "90 (34) 33 (88,~ i"" 8 (29~ ~8 ;-::. "'''' (\ Intersection #12 TassajaraJS. Dublin Ranch ¡:;:- '" N ~~ã) ;:-~;;; ~ 1 (8) ~ '" ,,251 (96) 2 (0)-" . i"" 1 (0 ¡;¡;::-¡;;- 13 (8)"""\ ~~æ o~- "''''- 11">0> N Intersection #18 FallonIJ.580 we Ramps ~'" "'... ~:::. ~39 (19) ¡;¡;1; 12(6) ~ "32 (27) . ~m "'~ -'" M'" o - -,~"\ '11 :~ !:'.z ~ =r 5'~ ~I~ _-1___" , , , , , , . .....::11..... ----- Exhibit 16 EXISTING TRAFFIC VOLUMES 4.7 Utilities and Services Sewer, water, stonn drainage, electricity and natural gas, and solid waste were analyzed in Chapter 3.4 and Chapter 3.5 of the Eastern Dublin EIR; in 1994, an addendum to the Chapter 3.5 analysis of sewer treatment and disposal (dated August 22, 1994) was approved by the City Council. SEWER Sewer issues (also referred to as "wastewater") were analyzed in Chapter 3.5 of the Eastern Dublin EIR and a 1994 Addendum to the Eastern Dublin EIR. This supplement to the EIR examines the effect of recent planning for additional wastewater disposal capacity in the Tri-Valley area. It also examines the impact of faster-than-expected growth in the Tri- Valley area and the impact on planned expansion of DSRSD's treatment plant facilities. ENVIRONMENTAL SETTING The Eastern Dublin EIR thoroughly examined wastewater collection, treatment, and disposal issues for the Eastern Dublin area. The proposed Project area currently is not served by a wastewater service provider and would require wastewater collection facilities. The Dublin San Ramon Services District (DSRSD), which owns and operates a treatment plant in Pleasanton, is identified as the future provider of collection and treatment services for the Project area. Disposal was to be provided by the Livermore Amador Valley Water Management Agency (LA VWMA), a joint powers authority composed of Livermore, Pleasanton and DSRSD, which operates a pipeline that carries treated wastewater over the Dublin grade and into East Bay Dischargers Authority (EBDA) facilities for eventual discharge into San Francisco Bay, and by the Tri-Valley Wastewater Authority (TW A), a joint powers authority which at the time was planning for necessary disposal capacity beyond that provided by LA VWMA. At the time of the Eastern Dublin EIR, TW A was proposing to transport untreated wastewater through the Central Contra Costa Sanitary District system for treatment and disposal in Martinez. In 1994, TWA transferred authority over acquiring / constructing additional disposal capacity to LA VWMA and LA VWMA later chose as its preferred alternative the construction of a second disposal pipeline over the Dublin Grade for discharge into San Francisco Bay using EBDA facilities (1994 Addendum to the Eastern Dublin EIR). IMPACTS AND MITIGATIONS FROM THE EASTERN DUBLIN EIR The Eastern Dublin EIR identified numerous potential impacts related to wastewater. The lack of a collection system was identified as a significant impact and Mitigation Measures 3.5/1.0 - 5.0 generally preventing development until such facilities are constructed by developers were adopted to mitigate this impact to less than significant. Potential growth-inducing impacts of pipeline construction were mitigated by preventing the construction of facilities greater than those required for the GP AI SP project. Inadequate treatment plant capacity Dublin Ranch West Draft Supplemental EIR City of Dublin Page 113 November 2004 in DSRSD's treatment plan and inadequate disposal capacity were identified as significant impacts: both were mitigated to a less-than-significant level by mitigation measures requiring developers to obtain "will-serve" letters from DSRSD prior to issuance of grading permits; DSRSD will not issue a "will-serve" letter in the absence of treatment-plant and disposal capacity. An additional mitigation measure requires Eastern Dublin developers to prepare detailed wastewater capacity investigations. Other mitigation measures supported DSRSD, TW A and, subsequently, LA VWMA in efforts to expand treatment and disposal capacity (along with recycled water projects). Other impacts to the planned TW A disposal systems and the recycled water systems related to noise, odors and potential spills also were identified and mitigated to levels of insignificance. The impact of the use of recycled water on the main groundwater basin was identified as a potential impact and a mitigation measure requiring coordination of recycled water projects with Zone 7' s salt mitigation program mitigated this impact to insignificance. Even with mitigation measures, significant impacts related to increased energy use for the sewer systems (Impact 3.5 / F, H, U) and growth-inducement (Impact 3.5 / T) remained significant and unavoidable. Upon approval of the GP AI SP, the City adopted a Statement of Overriding Considerations for these impacts (Resolution No. 53-93). SUPPLEMENTAL IMPACTS AND MITIGATION MEASURES The Project proposes approximately the same type and density of development assumed in the Eastern Dublin EIR. However, the Initial Study identified potentially significant changes since the Eastern Dublin EIR due to subsequent planning for additional wastewater treatment and disposal capacity. Significance Criteria. Wastewater treatment and disposal impacts are considered significant if they would require new or expanded wastewater treatment facilities beyond what was anticipated in the Eastern Dublin EIR or if there would be inadequate treatment and I or disposal capacity to serve the proposed Project. Supplemental Impacts. Since improvements identified in the Eastern Dublin EIR will accommodate potential development of the Project area, no supplemental significant impacts are anticipated, as further discussed below. LA VWMA is presently constructing a new treated effluent disposal facility that will adequately accommodate additional wastewater flows generated by this and other projects in the Eastern Dublin area. Based on a recent conversation with LA VWMA staff, the new disposal pipeline is nearly complete and is anticipated to be operational in approximately November 2004 (pers. comm., Vivian Housen, 9/1/04). Wastewater Treatment Plant Capacity. Wastewater generated within the DSRSD service area is directed to the District's Wastewater Treatment Plant (WYVTP) located north of Stoneridge Drive in Pleasanton. The WWTP serves the cities of Dublin and Pleasanton. Anticipating that additional disposal capacity will be available following completion of the second LA VWMA pipeline (described below), DSRSD recently completed the first stage of its planned expansion to serve additional growth in its service area that added 5.5 mgd ADWF to the Dublin Ranch West Draft Supplemental EIR City of Dublin Page 114 November 2004 treatment plant for a total of 17.0 mgd ADWF (source: Steven Delight, DSRSD 8/31/04). This expansion is consistent with Mitigation Measure 3.5/9.0 of the Eastern Dublin EIR, which anticipated the expansion of DSRSD's treatment plant in stages, as capacity needs increased. Plant expansion is expected to provide sufficient capacity to accommodate the proposed Project. In any event, the mitigation measures in the EIR and DSRSD's inclusion of Eastern Dublin in its long-range wastewater planning ensure that the limited treatment plant capacity is a not a new significant impact. Therefore, there is no new supplemental significant impact due to treatment plant capacity. Disposal Capacity. As was noted in the Eastern Dublin EIR, the increase in wastewater flows resulting from the GPA/SP requires an increase in wastewater disposal capacity. As noted above, LA VWMA, rather than TW A, is the agency charged with increasing wastewater disposal capacity for the Tri-Valley area. LA VWMA needs disposal capacity above and beyond its current pipeline to serve Eastern Dublin and other development within the Livermore/ Amador Valley. In addition, LA VWMA's existing pipeline is deteriorating. Therefore, LA VWMA is repairing its existing export pipeline, constructing a new parallel pipeline, and I or replacing the existing pipeline to create additional disposal capacity and connecting it to the EBDA outfall. When completed the LA VWMA system will have a capacity of 41.2 MGD (8.7 Livermore, 16.25 Pleasanton and 16.25 DSRSD). If Livermore decides to pay into the expansion portion of the pipeline project in the next five years, the Pleasanton and DSRSD allocations would be adjusted to 14.4 MCD each. Design of all phases is complete and the project is under construction and is anticipated to be completed in approximately November 2004. Once the expansion is completed, the disposal capacity needed to serve the Project area would be available. Since LA VWMA's capacity expansion project has been approved by the LA VWMA Board, is adequately financed, and portions are under contract,. adequate wastewater capacity is anticipated to be available when the Project area is developed. In any event, mitigation measures in the Eastern Dublin EIR ensure that development will not take place if there is insufficient wastewater disposal capacity. Therefore, there is no new sigrúficant impact due to disposal capacity. WATER Water service was analyzed in Chapter 3.5 of the Eastern Dublin EIR. This supplement to the EIR examines whether new water supply contracts and litigation concerning the sufficiency of DSRSD and Zone 7' s water supplies to serve future development are significant new impacts beyond what was analyzed in the Eastern Dublin EIR. ENVIRONMENTAL SETTING Dublin Ranch West Draft Supplemental EIR City of Dublin Page 115 November 2004 No public water service currently is provided to the Project area. The residences and other land uses in the Project area use locally pumped well water. The Eastern Dublin EIR identifies DSRSD as the provider of water service to Eastern Dublin. DSRSD's long-range water planning for Eastern Dublin includes the Project area. DSRSD obtains its water supplies from Zone 7 of the Alameda County Flood Control and Water Conservation District (Zone 7), which wholesales treated local surface water, groundwater and imported water from the State Water Project to retail water agencies. IMPACTS AND MITIGATIONS FROM THE EASTERN DUBLIN EIR The Eastern Dublin EIR identified significant impacts related to the supply of water to the Specific Plan area. Mitigation measure 3.5 I 23.0 addresses possible salinity in the groundwater basin. Mitigation measures 3.5 124.0 - 40.0 were adopted to prevent overdraft of ground water resources by requiring or encouraging annexation and connection to DSRSD; to minimize the effect of additional demand for water by encouraging water recycling and conservation and by encouraging the development of new facilities and supplies; and to ensure the development of a water distribution system by generally preventing development until such facilities are constructed by developers. Other mitigations (3.5 / 41.0 - 43.0) were adopted to deal with the potential for reservoir failures, the potential for loss of system pressure, and noise from water system pump stations. The Eastern Dublin EIR noted that the Eastern Dublin General Plan and Specific Plan would increase demand to serve development at build-out under the then-applicable general plans and required an additional 25,000 acre- feet annually (AFA). Mitigation Measure 3.5/28.0 relied on Zone 7's planning to acquire additional supplies. Impact 3.5 / S found a lack of a water distribution system and required a "will serve" letter prior to grading permit (mitigation measure 3.5 13.8.0). Impact 3.5 I T, Inducement of Substantial Growth, was deemed to be significant even after mitigation. Upon approval of the GP AI SP, the City adopted a Statement of Overriding Consideration for this significant unavoidable impact (Resolution No. 53-93). SUPPLEMENTAL IMP ACTS AND MITIGA TON MEASURES The proposed Project envisions approximately the same type and density of proposed development assumed in the Eastern Dublin ElR. Thus, water use related to potential development of the Project area is not expected to differ significantly from the Eastern Dublin EIR. This supplement DEIR examines whether new water supply contracts and settlement of litigation concerning the legality of a 1998 amendment to a 1994 water supply agreement between DSRSD and Zone 7 to serve future development in Dougherty Valley would affect the sufficiency of water available to serve the Project area. Significance Criteria. Water Supply impacts are considered significant if there would be an insufficient water supply for the Project. Supplemental Impacts. No supplemental significant impacts are expected due to new water supply contracts or the settlement of the Dougherty Valley litigation Dublin Ranch West Draft Supplemental EIR City of Dublin Page 116 November 2004 concerning the sufficiency of DSRSD's water supplies to serve future development. Water Supply Contracts. Pursuant to its 1994 contract with DSRSD, Zone 7 is obligated to supply water requested by DSRSD, subject to its availability. In 1994, DSRSD renegotiated its water supply contract with Zone 7. The renewed contract is for a term of 30 years and is renewable upon expiration. The agreement also provides DSRSD with the ability to secure alternative sources of water. Alternatives include: water transfers, construction of wells and pumps from the groundwater basin that Zone 7 manages, and recycled water. Zone 7 has, consistent with its contractual obligation to provide water to DSRSD and other retailers and the mitigation measures in the Eastern Dublin EIR, obtained additional supplies and entitlements to water necessary to serve its service area. Zone 7's Water Supply Planning Program sets forth its long-term water supply and facility needs through the year 2020. A twenty-year water- supply planning horizon customarily is used in the industry (see Water Code section 10631). Zone 7's Water Supply Planning Study Update (Water Transfer Associates, February 1999) identified Zone 7's water supply acquisition program. Based on input from the water retailers, cities, and agricultural users within its service area, Zone 7 estimated that by the year 2020 (near buildout of Zone 7' s service area), it would need an additional average year water supply of approximately 40,400 AFA. To meet projected demands, Zone 7 identified water supply options based on average, wet and dry year scenarios. The planning program addresses potential water supply options, groundwater management, and conveyance and treatment facilities. Zone 7 has secured or is in the process of securing the identified water supplies and is planning the necessary facilities, as evaluated in the Zone 7 Water Agency Water Supply Planning Program ElR. Zone 7' s long-term and drought-year protection water sources are shown in Table 18 below. DSRSD's Final Water Service Analysis for Eastern Dublin (December 2001) demonstrates that Zone 7 already has secured sufficient supplies to serve the 5,620 AF A demand of all of Eastern Dublin. Therefore, there is no supplemental significant impact due to new water supply contracts. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 117 November 2004 Table 18. Zone 7 Water Supply Acquisition Projects Project Name Amount Funding Status Term! Source Expiration Long-Term Water Supply Sources Byron-Bethany 2 - 5,000 afa Zone 7 Completed 1998 15 years, Irrigation District Connection Fee Agt. No. A98- renewable Program 03-BYR Berrenda Mesa SWP 7,000 afa (920 Dougherty Completed Dee Until 11/20/36 Entitlement Transfer afa) (Net to Valley 1999 Zone 7) Developers SWC Amendment 19 Lost Hills SWP 15,000 afa Zone 7 Completed Dee Until 11/20/36 Entitlement Transfer Connection Fee 1999 Program SWC Amendment 20 Belridge SWP 10,000 afa Connection Fee Completed Dee Until 11/20/36 Enti tlement Transfer Pre-payment 2000 SWC from North Amendment 21 Livermore Developers Drought Year Protection Semitropie Water 3,870 afa, min Dougherty Implemented Until 12/31/35 Storage Bank (43,000 Valley 1998 Agt. No. af) Developers A98-07-SEM Semitropie Water 1,980 afa min Zone 7 Implemented Until 12/31/35 Storage Bank (22,000 Connection Fee 1999 Agt. No. af) Program A98-07-SEM Amendment Semitropic Increased 13,000 afa min Zone 7 Semitropic to Pumpback Project Connection Fee Draft Agreement Program Dry-Year Options 15,000 afa Zone 7 May not be Connection Fee needed w / Program Semitropic Pumpback Import Water Conveyance First 7/ 22nds of Future 7,000 afa Zone 7 Completed Dee Until 11/20/36 SBA Contractor's Share Connection Fee 1999 SWC Program Amendment 19 Next 15/22nds of 15,000 afa Zone 7 Completed Dee Until 11/20/36 Future SBA Connection Fee 1999 w/ 5-yr w / opt out in Contractor's Share Program opt-out SWC 2005 Amendment 20 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 118 November 2004 SBA Conveyance 10-50,000 afa Zone 7 CDM & ESA Alternatives, including Connection Fee Study Upgrades & Line B-4A Program Completed DWR (SBA Parallel Pipe); In- Study Agreement Valley Pipeline and Near Term SBA Improvements ($7,035,000) approved 5-2-01 *Cost excludes pumping eost into Zone 7 area ($15-20/ af) SBA = South Bay Aqueduct SWC = State Water Contract Sources: (1) Zone 7, Alameda County Flood Control and Water Conservation District, 2001 (2) City of Dublin Eastern Dublin Properties Supplemental ErR. January 2002 Water Supply Litigation. In 1998, DSRSD and Zone 7 entered into an amendment to their water supply agreement that pennitted DSRSD to expand its service area to include the Dougherty Valley Service Area. The expansion process included various approvals by Zone 7 and DSRSD and the purchase from third parties of State Water Project entitlements. Following the approvals, Otizens for Balanced Growth ("Citizens") and the City of Livennore ("Livennore") filed separate lawsuits challenging the legality of the amendment to the water supply agreement. The litigation was concluded by a multi-party settlement agreement (the "Settlement Agreement"). DSRSD also entered into a "Memorandum of Understanding Regarding Cooperative Implementation of Agreement to Settle Water Litigation" with the City of Dublin in December 1999. Although the City was not a party to the litigation or the Settlement Agreement and the litigation did not concern Dublin or the territory in the Eastern Dublin GP AI SP area, Section 4 of the Settlement Agreement obligates DSRSD upon receipt of a Notice of Preparation of an EIR concerning a project in Eastern Dublin, to prepare a preliminary water service analysis and a preliminary impact analysis which analyzes the water-related impacts of the proposed Project. Two of the parties to the Settlement Agreement, Citizens and Livennore, may comment on the adequacy of the documents and may engage DSRSD in a dispute-resolution process pursuant to the Settlement Agreement. The Settlement Agreement anticipates that, at the conclusion of the dispute- resolution process, final analyses will be produced. The infonnation provided by DSRSD to the City pursuant to this Settlement Agreement process is intended to assist the Oty in its CEQA review and land use approval process for development projects in Eastern Dublin. The level of analysis required by the Settlement Agreement is significantly more detailed than is required under CEQA or any other state or local law. The Oty land use application review and LAFCO annexation processes are independent of the requirements of the Settlement Agreement, which is binding on the parties to the agreement only. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 119 November 2004 As required by the Settlement Agreement, DSRSD has prepared' and has submitted to the City a Programmatic Water Service Analysis ("PWSA") and preliminary impact analysis for the proposed Dublin Ranch West Project. As required by the Settlement Agreement, the PWSA demonstrates that: · The water demand for the Project area is set forth in DSRSD's most recently adopted Urban Water Management Plan (adopted May 2000): · Total firm sustainable water supplies (as defined in the Settlement Agreement) that reasonably may be expected to be available to DSRSD will meet the projected water demand associated with the Project, together with all other existing uses and uses under build-out of the applicable general plans for all areas lying within DSRSD's water service area, as and when demand is expected to arise. This conclusion is based on Zone 7' s contractual obligation to provide DSRSD with sufficient water to serve DSRSD's customers, along with an analysis of Zone 7's available resources in the future; · During a "credible worst case drought scenario" (as defined in the Settlement Agreement), providing water to the Project area will not significantly and adversely affect the reliability of water service to DSRSD's existing customers; and · During a "credible worst case drought scenario" (as defined in the Settlement Agreement), providing water to the Project area will not significantly and adversely affect the quality of water service to DSRSD's existing customers. With the submittal of the Water Service Analysis and execution of the memorandum of understanding, DSRSD has complied with the terms of the Settlement Agreement, and there is no supplemental significant impact due to water supply litigation. Water Demand. DSRSD recently eommissioned an analysis of anticipated water use for the proposed Project, with and without proposed amendments to the General Plan and Eastem Dublin Specific Plan. The report is entitled "Integration of Proposed Dublin West Annexation Area into District's Potable and Recycled Water Systems," dated December 31, 2003. The report concludes that with the construction of planned infrastructure system elements in the Eastern Dublin area, adequate potable and recycled water would be available to serve the proposed Project, with or without the proposed Specific Plan Amendment. Table 19 shows anticipated potable water demand at build out of the proposed Project compared to DSRSD's 2000 Water Master Plan. Table 19 shows that anticipated potable water demand for the Dublin Ranch West property, including the replacement of the Elementary School site with residential uses, would be somewhat less than anticipated in the District's 2000 Master Plan. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 120 November 2004 Table 20 shows that the anticipated use of recycled water for the Project area would be less than anticipated in the Master Plan, even if the currently planned Elementary School site were to be replaced with residential dwellings. In sum, there would be no supplemental significant impacts for water demand for the proposed Project. STORM DRAINAGE Storm drainage was analyzed in Chapter 3.5 of the Eastern Dublin EIR. This supplement analyzes whether storm drainage facilities needed to serve the Project area would exceed those previously identified. ENVIRONMENTAL SETTING The Project area is within the Alameda Creek watershed, which drains to the San Francisco Bay. Zone 7 is responsible for master planning, overseeing construction coordination and maintaining major storm drain channels and culverts for this area. The City has jurisdiction and maintenance responsibility over local storm drains that discharge to the Zone 7 flood control system and would be responsible for the approval of local storm drainage facilities. Drainage on the Project area drains to Tassajara Creek which flows southerly to connect with Zone 7 facilities south of I-580. South of the Project area, Tassajara Creek has been improved or has existing capacity to accept the design flow as determined by Zone 7. IMPACTS AND MITIGA nON FROM THE EASTERN DUBLIN EIR The Eastern Dublin EIR identified potential flooding related to increased runoff to creeks (IM 3.5/Y). Adopted mitigation measures required the construction of drainage facilities designed to minimize erosion and flooding and requiring the preparation of storm drainage master plans for all development applications in Eastern Dublin (11M: 3.5 144.0-48.0). The potential for reduced groundwater recharge due to increased impervious surfaces (1M 3.5 I Z) was mitigated by water quality planning and Zone 7 recharge programs (MM 3.5 / 49.0-50.0). The potential for increased non-point source pollution due to development (1M 3.5 / AA) was addressed in mitigations requiring compliance with storm water quality programs (IvIM 3.5/51.0-55.0). SUPPLEMENTAL IMPACTS AND MITIGATION MEASURES The proposed Project envisions approximately the same type and density of potential development assumed in the Eastern Dublin EIR. Therefore, the proposed Project is not anticipated to contribute substantially greater quantities of stormwater runoff than originally analyzed. Pursuant to the Initial Study, this supplement analyzes whether new storm drainage facilities required to serve the Project area exceed those analyzed in the Eastern Dublin EIR. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 121 November 2004 Significance Criteria. Storm drainage impacts are considered significant if the Project area would require new storm drainage facilities substantially in excess of those that were anticipated in the Eastern Dublin EIR. Supplemental Impacts. No supplemental impacts are anticipated. Storm drainage facilities described in the Eastern Dublin EIR will accommodate potential development of the Project area. SOLID WASTE Solid waste was analyzed in Chapter 3.4 of the Eastern Dublin EIR. This supplement analyzes whether rapid development in the Tri-Valley area would have significant impacts on the availability of solid waste services beyond those identified in the Eastern Dublin EIR. ENVIRONMENTAL SETTING Livermore Dublin Disposal Service/Valley Waste Management (LDDS/VWM) provides solid waste collection and recycling service to the Project area. The 1995 franchise agreement between LDDS IVWM and the City of Dublin expires in 2005 and is subject to renewal for three years. The franchise agreement states that LDDS/VWM has sufficient capacity in the Altamont Landfill and Resource Recovery Facility to account for development within the Eastern Dublin Specific Plan and the General Plan Amendment areas. Solid waste collected by LDDS/VWM is transported to the Altamont Landfill and Resource Recovery Facility in unincorporated Alameda County. The landfill is receiving approximately 6,000 tons of solid waste from the LDDS/VWM service area per day. The estimated remaining capacity at the landfill is approximately 9 million cubic yards. This is anticipated to provide landfill capacity for 5 or 6 more years. In 2000, the Alameda County Board of Supervisors and the Alameda County Waste Management Authority approved expansion of the landfill. The expansion would add an additional 40 million cubic yards of capacity which would provide approximately 23 to 25 additional years of service. IMPACTS AND MmGA nON FROM THE EASTERN DUBLIN EIR The Eastern Dublin EIR addressed the impact of increased solid waste production and the impact on solid waste disposal facilities. (See Impacts IM 3.4/0 and IM: 3.4/P.) It was specifically noted that the Eastern Dublin Project could accelerate the closing schedule for the Altamont Landfill. The Eastern Dublin EIR found the impacts to be potentially significant. The impacts were reduced to the level of insignificance by mitigation measures that required the preparation of a comprehensive solid waste management plan for Eastern Dublin and that prevent approvals of development unless sufficient or a reasonable expectation of adequate landfill capacity is available to accommodate Project wastes. Mitigation measures 3.4/38.0-40.0 requiring preparation of a Solid Waste Management Plan were adopted to reduce these impacts to a level of insignificance. All mitigation measures adopted upon approval of the GPA/SP Dublin Ranch West Draft Supplemental EIR City of Dublin Page 122 November 2004 continue to apply to implementing actions and projects such as the proposed Project. SUPPLEMENTAL IMPACTS AND MITIGATION MEASURES Significance Criteria. Solid waste impacts are considered significant if the Project requires disposal capacity in excess of the current solid waste management capacity. Supplemental Impacts. No supplemental impacts regarding solid waste disposal capacity are anticipated from the rapid development of the Tri-Valley area. When the previous EIR was certified, expansion of the Altamont landfill had not yet been permitted. Since the previous EIR expansion of the landfill has been approved to provide long-term disposal for development under the Eastern Dublin GP AI SP, including the current Project area. LDDS/VWM does not foresee any problems in collecting or disposing of the solid waste or recyclable materials generated by the proposed Project (Nick Perata, LDDS personal communication, 6/2/03). In addition, the increase in solid waste and recyclable materials would be accommodated at the Altamont Landfill and Resource Recovery Facility (Nick Perata, LDDS personal communication, 6/4/03). Thus, there are no significant impacts beyond those analyzed in the Eastern Dublin EIR. ELECTRICITY AND NATURAL GAS Electricity and natural gas service was analyzed in Chapter 3.4 of the Eastern Dublin EIR. This supplement to the EIR analyzes whether the recent energy crisis and other local factors prevent an adequate supply of electricity. ENVIRONMENTAL SETTING Pacific Gas & Electric Company (PG&E) provides electricity and natural gas to the Project area. Existing dwellings and other structures within the Project area are presently receiving service from PG&E. At the statewide level, California recently went through an energy crisis resulting from its deregulation of electricity markets. The crisis appears to be related to the regulatory factors and a lack of an adequate supply of electricity. At the local level, PG&E's recently completed a new regional substation in the Tri- Valley which provides necessary electrical service to new developments in the Eastern Dublin area (source: Buck Jones, PG&E, 4/22/04). IMPACTS AND MITIGA nON FROM THE EASTERN DUBLIN EIR The Eastern Dublin EIR identified three potential significant impacts related to electricity and natural gas. Two of these impacts, Impact 3.41 Q Demand for Utility Extensions and 3.41 S Consumption of Non-Renewable Natural Resources, were deemed to be potentially significant impaets that would remain significant even with mitigation. Upon approval of the Eastern Dublin GP A/ SP, the Gty Dublin Ranch West Draft Supplemental EIR City of Dublin Page 123 November 2004 adopted a Statement of Overriding Considerations for these significant unavoidable impacts (Resolution No. 53-93). SUPPLEMENTAL IMPACTS AND MITIGATION MEASURE The Project proposes approximately the same type and density of potential development assumed in the Eastern Dublin EIR. The Initial Study for this Project identifies the current uncertainty regarding supply of energy, including electricity and natural gas, to serve the proposed Project as a potentially significant impact. Significance Criteria. Energy consumption impacts are considered significant if gas and electricity supplies are insufficient to serve the Project from existing entitlements and resources. Supplemental Impact UTS 1. Local Electrical Distribution Constraints. Based on a recent discussion with PG&E staff, the substation has been approved and is anticipated to be operating in December 2004 or soon thereafter (source: personal communication with Buck Jones, PG&E 3/11/ /03). With construction and operation of the Tri-Valley 2002 Capacity Increase Project the there would be a less-than-significant impact with providing necessary electrical resources to the Project site. Supplemental Impact UTS 2. Availability of Natural Gas Supplies. Recent discussion with PG&E natural gas service planners indicate that adequate long-tern natural gas supplies exist from PG&E to serve the level of development that could be allowed in the Project area. Although limited natural gas delivery systems exist in and near the Project area, Project developers would be responsible for extending natural gas infrastructure to serve future development (source: personal communication with Sheila Cebalos, PG&E natural gas service planner 6/3/03). Supplemental Information in Response to Notice of Preparation (NOP) The following infonnation is supplied based on responses received by the City of Dublin from the Notice of Preparation distributed for this DSEIR. Surface Water Quality Impacts (Regional Water Quality Control Board) Although any proposed development within the Project area will be subject to surface water quality mitigation measures adopted as part of the Eastern Dublin EIR, development projects will also be required to comply with updated surface water quality standards, included in the Alameda Countywide Oean Water Program or successor documents as may be adopted by the Oty of Dublin andnRegional Water Quality Control Board, in effect that the time such specific individual development projects are submitted to the City of Dublin. Dublin Ranch West Draft Supplemental EIR Page 124 City of Dublin November 2004 Hydrologic and Hydraulic Analysis (Zone 7) The City of Dublin will require developers of future individual projects to submit hydrology and hydrologic analyses to identify specific increases in storm water runoff into Tassajara Creek. Such reports will be reviewed by both the City of Dublin and Zone 7 Water Agency. Main Basin Salt Loading (Zone 7) The salt loading from development within the Project area to the main ground water basin is caused mainly by the use of reclaimed water irrigation systems. (David Lund, Zone 7). Salt loading to the Main Basin from this project development is considered by Zone 7 to be "minimal, to no" impact. This impact is more of a regional salt-water management problem, because it results from the accumulation of all existing and proposed irrigation system improvements of the entire region. In 1999, Zone 7 adopted a Salt Management Plan that will completely offset salt loading that would otherwise take place. Zone 7 is actively implementing the Salt Management Plan over the next several years. The plan includes demineralizing shallow groundwater with high salt content and reinjecting it into the groundwater basin; the resulting salty brine is to be piped out of the basin through the LA VWMA disposal facility. (Zone 7, Salt Balance Annual Report, June 20,2001.) Zone 7 has addressed the salt loading impacts to the main groundwater basin and the mitigations needed in a joint ACWD- DERWA study. Based on this study Zone 7 has included the construction of brine processing facilities as part of their Capital Improvement Program that is currently being funded by Zone 7 fees. The City will continue to work with Zone 7 and with the other agencies to resolve the problem. The funding for mitigations of salt loading will be paid for with increased water and sewer rates of Zones 7 and DSRSD. All development within the Project area will pay for mitigation of increased salt loading impacts through the payment of their water and sewer hook up fees and water rates. This complies with Eastern Dublin EIR MM 3.5/23.0, which required recycled water projects to be coordinated with any salt mitigation requirements of Zone 7. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 125 November 2004 ~ == ~ s CI Q a.. CI - ~ ~ CI - .Q :¡ ~ - ¡; 0 .. ~ ;;; ... - £: ct:) ~ CI ~ 8 ... ~ ..c £: . I;, ¡; == ¡ ~ t:=::: . ::e == .... - .Q = Q c:r\ ~ CI - .Q ~ ~ .. ~~'2 :iíi ;t.~ N\DI"'I-O ~;¡1;;;J:;~:; - .. :: .! Õ ¡; .~ Do Q OfOl\OO--Of-o oeooocoW't oocicóo== ~;l Q Ë E :~ f"o-_NOOONOOOOON '1:š1~~~~~~~~â:~~a ! .! ~ ~:'Q ..; ~5 Q ! :'Q t~~:.1::"":~~"':~~~~~:! .:: .~ '¡ ,.... :: _ _ - C ..... 0 0 C'i N -=> :::: ]~ ~~ .. Do .. . -... ..." :! . .:!~ ~=;::- 2! ... . .. .. .. - - .. .33"; N~O ..... o.N -,,¡...~-.-.j- .1l-ã ... ~ - ..... Pol N ..." .. .. ~=~ ...c¡,; .2 .. .. .. .. ..- - .. ,,> -... . coc 0"'0 ..... co ....... -=òó ..'" 00 -.:- ~¡:; ~~ ~! ~ ti5 -!: ~ i~ ~-L ~CIG!!!IIÐ~ ! .s :I:=I~I,I'-"¥u":"::I~ø ;--=~~~~:i:ai:¡¡:¡¡~~~ -:r .= iii i iii :¡ Ii ¡ .. iii; iii ¡¡ Iii Ii i ;:;: g ~ S! '" e P! ~·41 ~ g 52 =~",,"-~;;C5::;:;-NØ ;tE 2 22 ¡: c öd . :! ~E :ii: i~ .. .. c;; ~ .. 6t~ :::¡ ...~ ~~~ - . " .!ë,! ~Do- QO,....OOO.O--ON _....CQOClOOOQQIIn ÒCOCÓOOOOOQÔ ~t-; ~¡æ "~...~!::~88gSgg8g" ~:š~c:iciOCC)QciciCOÓ:;! !~5 ~r:= ..; ..." . .. Q E :.& :t~'":~~ w-t::"'NN <~...._... '3=š r.~ :. CI'oOO\ØO'\O\NOr: ciciclÒciNNd: .. - -... 1>" :! .. :!~ ..&:I~ .; t · .. - - .. I3~ ...... óóci .. c;; ~~~-~-~~- N~t"'I 10 f"4.... ow D "S ... , ¡ Ii .¡;;¡ ,: i I c .. ¡¡; .. :$ ... " ~ i ~ ~ ž < z o E o ..' . _ 'D ..." ~i~ ~~;: .. .. .. i~ - .. ,!¡~ ... c;; ...0" doo - ~;;; .. .. ¡:¡:¡¡ ~.: j 5 .p: ~ i iI=':I:l5=S§:s:st: .?I:¡~~~~~~~~~~ ~I ~ .. iii ¡¡ 12 e; iii; lit lit iii iii; = 'iir::gs:e~S!~W'!5:ge ~:!"'N-;3;;Q:;:-~o ..; è õ ~! è 0 .. . i: Ë ii ¡~ .. - _ c;; .. . .s þ~ &.¡.!o-~ ~.... .. !.-="';~ ;00 .. ':'1::1":0\ .. ... - ~ -åCUtoCl""... e.."- ... i~'" !::. .. ¡ë~ .. "" .; ... of rr; ~=~ .... ...0 2 "'~ ~ CI:_W\W\_ "'~ ï~7;;¡;;.! ~-: ¡ ~Æ~:I~:¡:? ~- :!... ~_"O_"'''" :!.c CI'æ -f"'¡\Ø CI\ =ë ~- ... ;> .. ;> on .: ~ f t ~-:;; : : ~ ¿ ~ : ~ - - ~ _= u.ë 10 - r- tt f::.u >-~ 2' "I: OIl.. ~=& !æ~ :,¡¡ E i ~ e-:.t " Ie ¡¡ . ..:i _.~=!32 ... ~:: .. .. - A. 'a_û=: ·ei~5= :; ~ ~~. u ¡ U~ ~~ = E u iU: -;; ~ =- i!'" ... ..'"D~C'2::1 õ- ca::~ ~~~ã..~ l!ððl5~! .. ~",,,,,'5! "~""1i!' -;¿o:.¡.!IgÕ.,~gg. ... l; "2 C :: i: of! ~ ....;: of: Q_i ~ õ fi·~ ~ .; ~ '! .: .: 5 ~ In ~ -= :;;:;; 'á,;¡, " ¡;¡ JQ.'á,:a:;; ~ ¡.; -~uu·¡;~~uü·¡¡uU 0 :j::s;::s;zzo¡¡¡zz~::E .... ..:. 0\ !£~;:1~c~:~-_C"o!'; (:).ë-tn- m_O N: i't got. t~£ g.li 1 Ä: ,m c:: ~ . "5 õi :£'1:..:00 ~ !:ji~¡:æ :¡ ~!.:.;! M ~~ ...~.t< ~'iiEc: "E~5:Z . E ~ ~ III § ~~ = g !:!~5-Si gi1~;t: ,=~~QA.~ "5CJQ.~~Q ib~-ã-g~ rtJ1~~~~ ~ .;; Q æ .:!.! :: ~;¡ :: ã .. ... Ii c '" ~ ~ ;.:! ~ '" "'.i ~ ~Q.ª,ª~~~ ~~.Ë!~~~ . ~"'O-g -1IiÐ..., ¡¡ ""'C"a ~ r- ~.3:f:f~~c3"¡¡;~:f:fõ~ .. c;; .. c;; .. ~i~ .z~~CQ""'O i;¡]¿:;;~~ ë~! ~:'Q ggS8=ëg~ ="òoèocoó ~t~ c ;¡ ¡ :::'a~!:óggg~gggg~ ~:š~ooe>OQooc>oodò 'B i ! ~..Q ..; ..." .. .. Q E .. :.= t~~~:~~C! <~.N!::MOO ..!! -... ~~ .. .. Q~o\o\,,",!~~ ¿r;::c N NO::::: ";; .. . õ -... ~ ~ c: ~ ; E -,; AO.._~ ~ .. = ~ ~ -!t;- £: ..- .. -. ~ ~:: ¡;;¡ - .. :! ..00 cir?Q o c;; ~=~-~-~~- N!:!..-. ~ t"'41N1 .. -;; g = ::e .. - -'to I>c .¡ Ë !- ....... ..= ï:::: .5!"" .. .. ..- - . .!ir: "'0" oeo '" c;; :¡ ~ .. ... Ïi ~ .- '" .. = ï :II E .. :¡; i ,: 'i I £: æ :š ... £: . - ã co ~ ~ z - -!Pi .. .. 'M2i !! !" ~ ¡: .. ~= ~:; Ail .,Eku It . a :I:::J:::Jt:....r::r:S"::lO:'; :..;-a-a-ø - _.-0 "~""O¡i ~ ..:a:a~:a~:a:a~:a~ -:\ % iii iii e; Ii:; iii; ~ j¡ ~ iii; iii; ¡¡¡~g:;:e"'!~~~~8~ a::'1...rt-~~O-~-NO :- - t:! t:! =:! ~ =; ~ ~ Q 00 ~ I .!! ~ ....: !.! co. ã _i¡ - ./:'- I... :g~...;~ -ö:U ....N i=:i - ~:~2 rot!:;.. " Ii .; z.... .-0 eæ:Æ~;!!~ Ii: 1~ ';:t~:;; o !:Ii: "'- ;;> ... .. ¡ '" ., ...... ~¡ !:Æ=~~~N "1f"'!1O _f'o!:; ~ ~~~=.þ°:r:=o- N~ oC f~ .. .. " Q, ~~ .ë go!!:. = 'DrtiC! ~ lID I ~ "~ ~f~i~~ f ... CD E ' j I~ ¡;~ ~~~:i...e. ... :-;¡ . - - '!!.;ø: 5õ:!!,z ¡¡'=~b" ~~.t:!!r:]~t:e !~!1..-:i =~¡:œ ~=bQ~g OUQbCl)O i~!:ãgg a~lj·ã;.! ~1!iQ='¡:'¡: :i:.s-¡¡::C:"" .!!~5~~.8~cr:...§§~~ I> -=-"" "Q"<:-="... ~ ~ 1: ¡¡ ~-f &.= ~~"E : 5 :j~~zzo~z~::;:èj¡.. o c;; o c;; ... .. ~ - .. ;¡ ... '" <O"=t C\lo 'r""o Q)C\I 0>.... t\J Q) Q..D E Q) > o Z o:t o o C\I (/) Q) - ca '(3 o (/) (/) « êñ o >- . - (/) Q) ~ iD o .... ::3 o CJ) a: W ëij - c:: Q) E Q) ã. Q. ::3 en :::: ca è5 - (/) Q) ~ £,§ CD ca ::3 a::CJ .S; Õ ::Õ>. ~:!: 00 '" ~ c ~~: ~~~~~~-~~,...~~ o.-:;o.n·c '''''=0\.0\ .'Þ....:... :: r-g ~ r: ~ ~ ~ ~ ~ ..; ¿ g;; CJÓ = a ~ ~ ~ c "".0. oõ \0. M .._ ~ ~ GO~ g GO '""... ..It '":I'O\t-N~M -"'1') -"" o !- ~ ~ ~i! ô>!c :1-g~~~~~:;:~g~ë!~~:; A.,,¡;!C'iC;'ClOOCCòOCOOO ] i'1i ¡:=a "0 = ftI e QJ o .. QJ - ftI ~ QJ - ,.Q ftI - CI ~ . = CI Z ... ,; t ... ..~ ..~ . :"...IIO~\C'o:-~~..,«",IIIO,,",o.~ :.!!~cS~"¡;;"':~~DC)cci";::: < II· _ ...2 -.... .!.;:= ¡: : .. . 'i or ~ ~ t ,~ ~ ~ ~ ~ ! ¡ 5 ~ 5 £E :¡¡:¡¡~:¡¡~:¡¡:¡¡~~~i~ ~] ~iI¡ Ud¡:¡:i~Iifi ¡_i : '¡.....,..""''''tn"''''''''W\'''''''.... ~iII~~~~~~~~~~~~ tJl)'"'''''''''''',.,........'''4'''Iof'''lf''\fI'I¡ - .. ;- '" -! t- .. II: c .. ¡; .. ;S ... .3 g .. I. ~~ I Ë- Ii ¡~~QÆ\.~~~~~~~~~~~ -::-¡¡ŠClo..,..!);s!Soooog Ë~~~~ ~~~~-~~~~~- -- I ]i .. i.. "Ë -! ~ ~"= : ~ :'J : t; ~ ~ a ~ :! _II - - W) - -< ž - fI) QJ ~ ..= y = ftI ~ = .... - ,.Q = o .. 0- _ c .. .. .:: ¡: :; .. c ã-.. 00 :", .. .. ~: ~m ~g~giS~~~~~8 c:ioci~o"';oóociò~ . Q N QJ - ,.Q ftI f-4 t¡ .! iEj?â~~s~~g~~~s; ~O(";NM"'ID-f'l"--Pli~N .. .. . ... - ë=-:Q~"~CIO..-o:~lIØtØ f't~ Q~N~"';=N~~ciO--"': ¡~ g-x. ~Ã: .!! ~!I& £cii~ :.:.1£, i . :! ~:- 5 ~~.o .;:;~ ~:¡'5~~ =~.8~ ¡!a:..¡ !¡¡;¡.~ ~ ~ ~·~i.! ~~a::i-;;. õooic:F =.:!~e"'''' ~uue~J, ~~iijggC)~ggji~ ;: ë Q X 1 ~ i!'1 ~ :: Q ! uQ ~ ~......'" ~...... § §~;j ~~i-1i~~~!'i~~'i1i;S a:3:!!~zzÖ'¡¡¡ZZ~:!!Õ+- ... t:i.. ,"",_~ r-..,. '<Ø ô:~o:~;o~;;~~~t;;~ :: tog ~ ~ ~ ~ ~ ~ ~ ~ ~ cO = r~ ~'=i°,,;..:-:Q~o:~~~:~ ii..~ f"'\N" _" ,.. ~.:: .. ~ =~-; ~~E _.oN __ 1I",;¡8-g-8..,-8õ8õg o.~iOCc)OOc:So=ooci_ ! =.; ¡:II: ... ~~~ ..i::;: ::~ ~ ... '" ... '" ..~"o .¥"' .0 . .N .!-e=C::!CIÓ~O::::!O ~ ...- .. ~ If õ II: CI !- ,., IØ""O\'¡ oo-=~ i .. . .. or ~ ~ 5 ~ ~ t ~ ~ ~ ~ ~ ~ !=:¡¡~~:¡¡O;~~:ii:¡¡~~~ 1I:'!!~~:¡¡:iiäd¡:¡¡~:¡¡1i :'¡~~;:J~~~:rJ~~~~ ~"I----------- 1 !s:...-a"'''''...''''......f''II........... ~ ::; . 1 11 1 I a: ! II: ¡:j ~ - ~ ~ ~ g.~ 8 ~ ~ ~ ~ g ~ ¡J C;oo-:o"':'cicic;ci~ 'i ..... Ie. :: = 0 a .~ ..- :¡¡ 1... ~: ~ .5CD -g 11 ~...ë'f i:i 0 w ù-. is ;: C.ï -t ~:;:. ~ :;:. :;: ;!:. -~ ~ ~ ~ ~ ~::~.c .oõc"'C>g:s~c>!;8 E~.;ij: p\mo."'_Ø\ m...._ Z; ~1: < ..;:E z · C> ~; f i!;::~~~~~aa~2 o ::~ - - .. ~ 'õ ~ i::;~š~š;;i1s~ŠŠ:; t<'CN"''''''--'''-'''1'I1''I ., .. Go - -~ ~ ¡I~-="'!NO~""!CI NtD u'¡~~=~ ~=ci--Ñ~ s¡ 8".. E"~~ 2t~~ õ ~m~ ~ œ':: VJ :! fI:i:tÊ-: ä mi".'g-¡ -.:!! ~~.~ "'0 0=- ø.·=A.oC ~.5~ °E'::¡uz - - '" "- ., ...:!! = Q ¡ofil:·~· ; -~";'[lr;¡¡: CI:!!cr:E-;g. goticr:!,~ 't ;: be'" '" -5 U C b,;;, .... ;a:"¡¡õõ.c1!1! ri51!-ã'2' a: i:.~ .9Ioc"~ø._u8C) ~~Q=i-s¡';i=C:!5Ir ..Q § ~......"q¡.D § §,;;,;j E "--~'¡'c--ã--·-"¡.i II :t ] ~ "- ._ It 5·- 1: "E : 0 æ~::Õ:!!~~~iii~;:¡::!!õ.. ... ~ c g~: .. .. '" ~"E~ -.. ."Ai. õ"" ¡.. .. .. g~'E = . = ~ ...~':C>-.o :]]~;;~ .. t- ! ~.:!a ;; -5 ... ~ ~ = ! iii - o " ~ ... ~~~ CI;~ :~~ =oa"O :.. ~ II: ~ .. . - t' E .. .. .. ~a:CI = .. . .. or ~ r-._ IØ 101"'- ~~:g~~ Q·f9'I.-:,"'tO II> -- ..,NT "'N ::;~~ ~E!~ =~'" ... ~~~;; 0\ . _ ~ ~R;;~ - "'::1 ~8;:;~8õgQ:a c>eoeoC;ócSC:; O~""W:=~""NGO~o."'! ci~';~Q~""¡c:ico-=~ !!!!f!!!!!!!!! ØUUUUIf, I"'~uuu !~~:ä~:ã~:;~~~~~ a:,!! :¡¡:¡¡Ii:¡¡:¡¡IiIiIi~:U :'¡~r.:~~;:J~~~::J~~ ~"1--------___ tP)""....P'I...,.,""...,..f"II",., _ 0 .. - ~ ~ ;:¡ t- .. a: c ~ II: a :II ~ .. = c .. ... "i a: ~ i a ï :II .. 0- - c :=..! ··S j ~ : -; 1 .=; .... - .. '¡G:I g~~g~8~~~~8 cód"':d~QcSoci": ¡ 1": ..! . ü '¡-¡!t". .~ ~~~d!-" .'$.~::'~~~~~~ .Æ:::=.I:';~o!)....~go~!'oo icf~i~ PI"~ _00 -~- I .!'~ : t~ ¡; - .. ;S ... ~ 8 c ~ t z; .. =i. -! -. -: = ~ ~ ~ ~ ~ -: =~"'_PttnO_"'o ;l da:~ ~ ~ i!j~~ŠŠ;;~5~ŠŠ~ ~4t~N~"'CIIi--f'\-",~ri .. .. ... - ,¡ Z Q t Q =.e., ~ -: "'! ..... c ::; : "'! _ _ ~:; ~ ð:;~~="'; IØ_C f'It~o ~ N en 5~ CD 8"¡t ãS ~Ã: e 13 ~ ;¡~. ! ~ ã.tiic! = UJ !! :B . ;, l: ~ ~ .. ;g :!!]~~; en ! =ø:a~'¡e!~ .; ~.: ¡::i U"-æa..I:D ~ ¡ ~ ~ a=: ..¡ ¡; ':.:0_:: E _0 CDen E ë -;¡ b" E ..,- Q~~2'" ~ ~ ~"~~ili: ~ t"fibg.frf au~~~c> -;O::'¡¡"c"81! =-g"c-S".'a: CD :t:~f¡"!foOCl=c~1i8ª 0 -e]Q=-=-=~..!-E=Q.'" :s .;ö ~ §.8.8~=.8 § §Ji~ 0 ¡: .-.- -ä,~ c ="â'Õ 'Õj ¡.o en ~ 3: "¡ ~ "¡¡ O¡¡ &. = O¡¡ .. W 0 a:~:!!:!!zzo~z:!!;:¡:o.. .....o:;¡- No "-0 CDC\J 0>>..- (¡ Q) a..c E CD > o Z ~ W (ij - c CD E CD a. a. ::I en = (¡ è5 - en CD ~ .1:.£ g15 (¡ ::I a:O .!: õ 15z. ::I __ O() 4.8 Schools The need for new school facilities was analyzed in Chapter 3.4 of the Eastern Dublin EIR. This Supplemental EIR examines whether student generation rates and the need for new school facilities has substantially changed since certification of the ElR. This supplement also examines the effect of Senate Bill 50, enacted in 1988, on the provision of school facilities. ENVIRONMENTAL SETTING The Project area lies within the Dublin Unified School District (DUSD). Enrollment in DUSD schools was 4,459 K-12 students in October 2003. This is based on the Dublin Unified School District Study of Demographic Projections and School Revenue Analysis, Draft, 2004, prepared by Shilts Consulting. Inc, July 2004. DUSD maintains five elementary schools, a middle school, a high school and a continuation high school. District enrollments have steadily increased over the past 10 years, at an average rate of approximately 2.5% for a ten year growth of 28%. On April 20, 2004, the District's Board of Trustees adopted Resolution No. 2003/04-37 declaring that the Elementary School site shown on the Dublin Ranch West site under the existing EDSP is no longer required as an Elementary School by the District. The Resolution notes that the Project developer is still required under the terms of an existing school mitigation agreement for the Dublin Ranch development Project to construct and dedicate without charge Fallon Middle School, to construct and dedicate to the District without charge Green Elementary School and to convey to the District a school site known as E-3 within the Town Center of the Dublin Ranch. This obligation could be met through credits against development impact fees. IMPACTS AND MITIGATION FROM THE EASTERN DUBLIN EIR The Eastern Dublin EIR projected the demand for school facilities that would be generated by adoption and implementation of the General Plan and Eastern Dublin Specific Plan. At the time the Eastern Dublin EIR was certified, DUSD had not adopted student generation rates for all levels of school facilities. The adjoining Livermore Valley Joint Unified School District however, had recently adopted increased generation rates for single and multi-family development for all school facilities for grades K-12. These student generation rates were used in the Eastern Dublin EIR for school impact purposes. Based on projected student generation, the Eastern Dublin EIR identified potentially significant impacts related to the demand for new school facilities and the potential for overcrowding if the demand was not met (Impacts 3.4/F, G and H). The EIR also identified impacts on financing school facilities (Impacts 3.4/I and n. Mitigation measures were adopted to reserve school sites within the Project area, to coordinate new development with school facilities planning and Dublin Ranch West Draft Supplemental EIR City of Dublin Page 128 November 2004 to encourage the broadest possible funding mechanisms for new school facilities (MM 3.4/13.0-19.0). These mitigation measures reduced impacts to a level of insignificance. All mitigation measures adopted upon approval of the Eastern Dublin GPA/SP continue to apply to implementing actions and development projects. SUPPLEMENTAL IMPACTS AND MITIGATION MEASURES The proposed Project includes approximately the same general type of land use as included in the Eastern Dublin General Plan and Specific Plan, however, the GP A/ SPA and the associated Stage 1 Development Plan would eliminate a planned 9.7-acre elementary school site and replace this land use designation with Medium High Density Residential that would allow development of up to 224 dwellings and replace a 0.8-acre site designated for Neighborhood Commercial with an Open Space land use designation. Significance Criteria. School impacts are considered significant if any of the following conditions were to occur: . If student generation rates have increased such that the demand for new school facilities would exceed the projections for new school facilities as identified in the Eastern Dublin EIR; · If the number of new dwelling units proposed would generate a significantly greater number of students than anticipated in the Eastern Dublin EIR, or as identified by DUSD; · If proposed school financing did not comply with the provisions of SB 50. Supplemental Impacts. Two potential supplemental impacts are identified based on the proposed Project: an increase in the number of school-aged students that could be generated by the proposed development program over and above student generation anticipated in the Eastern Dublin EIR and loss of an elementary school that is currently proposed to accommodate students that would be generated in the Eastern Dublin Specific Plan area, including the Project area. Supplemental Impact SCH-l. Additional Student Generation. Approval and construction of the proposed Project would generate more school aged students than anticipated in the Eastern Dublin Specific Plan and Eastern Dublin EIR. Table 21 summarizes anticipated school generation based on existing residential land use designations compared with proposed residential land uses. Students that could be generated from the Bragg and Sperfslage properties have not been included in the following table, since no land use changes are proposed for these properties. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 129 November 2004 Table 21. Existing and Proposed Student Generation, Dublin Ranch West Project Land Use Gen. Existing SP Land Use Proposed SP Land Use Rate* (mid-point density) (mid-point density) Units # Students Units # Students Low Density 0.74 80 59 75 56 Medium 0.25 641 160 557 139 Densi ty Med. High 0.13 96 13 402 52 Density - Totals -- 817 232 1034 247 .. Student Generation rates provided by Dublin Unified School District, July 2004 Based on conversations with DUSD demographic consultants, an antiåpated increase of 15 K-12 students would result with implementation of the proposed Dublin Ranch West Development Plan. This increase would be less-than- significant. Proposed Project students could be accommodated at Fallon Middle School (K-8) and Dublin High School (9-12). Fallon Middle School is planned by the District to house K-8 students through the 2007-08 school year, when additional K-6 schools in the Eastern Dublin area would become operational. Fallon Middle School is presently being planned to accommodate 1,000 students and would be located southwest of the Project site. Dublin High School, which has a current enrollment of approximately 1,270 students, is being planned for phased expansion to 2,300 students (source: personal communication, Brian Aas, Shilts Consulting, 3/14/03). Supplemental Impact SCH-2. Loss of Elementary School site. As part of the proposed Project, a 9.7-acre elementary school site located in the approximate center of the site would be converted to housing units. By adopting Resolution No. 2003 104-37, the Dublin Unified School District has declared that the planned Elementary School site is not required to provide educational services on the Project site or within Eastern Dublin and that adequate education facilities will be provided under an existing agreement with the developer of Dublin Ranch. Deletion of the Elementary School site would therefore be a less- than-significant impact. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 130 November 2004 4.9 Parks and Recreation Parks and recreation facilities were analyzed in Chapter 3.4 of the Eastern Dublin ElR. This Supplemental EIR examines whether proposed changes in the number and size of local parks as part of the proposed Dublin Ranch West Project would substantially change environmental impacts identified in the Eastern Dublin EIR. The location of trails in the vicinity of the proposed Project is also addressed. ENVIRONMENTAL SETTING The Eastern Dublin EIR identifies existing Oty facilities and park standards and East Bay Regional Park District facilities. City facilities and standards The City of Dublin's inventory of park and recreational facilities is composed of neighborhood and community facilities, community parks and community centers. Table 3.4.4 contained in the Eastern Dublin EIR identifies parks in the City of Dublin existing at the time the Eastern Dublin General Plan Amendment and Specific Plan was approved. No City park or recreational features existed near the Project area at that time; instead, these facilities existed to the west, within the then-urbanized portions of Dublin. Park and open space standards for the City was 2.5 acres of active parkland per 1,000 residents at the time the EDSP was adopted. Regional facilities Regional parkland and open space facilities in the Tri-Valley and adjacent areas within Alameda and Contra Costa Counties are provided by the East Bay Regional Park District (EBRPD). EBRPD owns property just south of the Project area on the west side of Tassajara Road. The District controls, through a combination of ownership and easements, the Tassajara Creek Regional Trail Corridor, which is located south and west of the Project area. This Corridor currently contains 22.8 acres of land with minimal facilities, consisting of a picnic table, restrooms, and a bridge over Tassajara Creek. The District had originally planned to construct a regional trail just west of the Project area on Parks RFT A land that would extend from Dublin Boulevard to the south, extending along the west side of Tassajara Creek and then extending north just inside the easterly boundary of Parks RFTA. This trail would then run northward through Contra Costa County to Mt. Diablo. Recently, the District has modified the proposed trail alignment to extend along Tassajara Creek within the Project area. IMPACTS AND MITIGATIONS FROM THE EASTERN DUBLIN EIR Dublin Ranch West Draft Supplemental EIR City of Dublin Page 131 November 2004 The Eastern Dublin EIR identified a number of impacts related to parks and recreational facilities. Impact 3.4/K indicated that increased demand for parks as a result of buildout of the EDSP would represent a significant impact on the ability of the City of Dublin to provide park service for future residents. It would also be a potentially significant cumulative impact for the community due to lack of sufficient city-wide park facilities that would not meet a standard of 5 acres of parkland per 1000 population. Mitigation Measures 3.4/20.0-28 were included in the Eastern Dublin EIR to reduce this impact to a less-than-significant level. These measures call for the acquisition and development of new parks and other outdoor facilities in Eastern Dublin, requiring land dedication and/ or park in-lieu fees for new subdivisions and similar techniques to provide for additional park and recreational features. Implementation of all of the mitigation measures identified in the Eastern Dublin EIR would result in a ratio of 6.7 acres of parkland per 1000 population in Eastern Dublin. Impact 3.41 L identified a park facility fiscal impact on the Oty of Dublin. The fiscal strain of providing new park facilities would be a potentially significant impact. Mitigation Measures 3.4/29.0-31.0 would require that each new development in Eastern Dublin provide a fair share of parks and open space facilities. Development of a parks implementation plan was also called for, to identify and prioritize parkland in Eastern Dublin. Finally, adoption of a park in- lieu fee program was required as a mitigation measure to reduce this impact to a level of insignificance. Consistent with these mitigations, the City requires residential project developers to dedicate parkland at the time of subdivision approval and pay Public Facility Fees (which includes park in-lieu fees) to fund both the development of neighborhood and community park facilities as well as other community facilities. Developer(s) of the Dublin Ranch West Project would pay Public Facility Fees at the time building permits are issued for individual dwelling units. Impacts 3.4/M and N dealt with the regional trail system and open space connections. Development of residential and commercial areas in Eastern Dublin was anticipated to have a potentially significant impact to the construction of a regional trail system (Impact 3.4/M). Adherence to Mitigation Measure 3.4/32.0 would require the establishment of a trail system with connections to planned regional and subregional trails, including the Tassajara Creek north-south trail to Mt. Diablo and would reduce this impact to an insignificant level. Urban development along stream corridors and ridgelines would adversely impact outdoor recreational opportunities for future Dublin residents and potentially obstruct the formation of an interconnected open space system (Impact 3.4/N). Adherence to Mitigation Measures 3.4/33.0-36.0 would reduce this impact to an insignificant level. These measures call for use of natural stream corridors and major ridgelines to create a comprehensive, integrated trail system that allows safe and convenient pedestrian access, and required developers to dedicate public access along ridgetops and stream corridors to accommodate trail and staging areas. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 132 November 2004 SUPPLEMENTAL IMPACTS AND MITIGATION MEASURES The Eastern Dublin Specific Plan identifies two neighborhood parks and one neighborhood square on the Dublin Ranch West property. This totals approximately 14.6 gross acres of parkland. In addition, the Specific Plan identifies 70 acres of open space both along the Tassajara Creek stream corridor through the site and on steep hillside areas within the Project area. Several parks and recreation regulatory documents have been adopted since adoption of the Eastern Dublin General Plan Amendment and Specific Plan. These include an updated City of Dublin Parks and Recreation Master Plan, the Eastern Dublin Comprehensive Stream Restoration Program and the East Bay Regional Park District Master Plan. City of Dublin Parks and Recreation Master Plan In February 2004, the City of Dublin adopted an updated Parks and Recreation Master Plan. The original Master Plan was adopted in 1994. The purpose of the Master Plan is to establish goals, long-term policies and standards to guide the City of Dublin in the acquisition, development and management of Dublin's park and recreation facilities for the next twenty years following adoption (page 3). The Master Plan depicts the approximate location of future parks, by type, design standards for parks and recreation facilities, the location and design of trail and parks and recreation maintenance and operations. The Master Plan also establishes standards of 1.5 acres of neighborhood parkland and 3.5 acres of community parkland (total of 5.0 acres) per 1,000 residents (Master Plan Table 1). The Master Plan uses net acres, rather than gross, to depict park facilities. Based on a discussion with the City's Park & Community Services Director, the Dublin Ranch West site is planned to contain 10.5 net acres of Neighborhood Parks and Squares (communication with D. Lowart, Dublin Parks and Community Services Department 11/1/04). A proposed Class 1 pedestrian/bicycle trail (separate from roads) is shown along the west side of Tassajara Creek and a Oass 2 Bicycle Lane (bicycle lane on road) along Tassajara Road. The City has constructed several parks in Eastern Dublin as residential construction has occurred. Phase II of Emerald Glen CommUIÚty Park has also been constructed at the southwest comer of Tassajara Road and Gleason Road. Emerald Glen Park now encompasses approximately 30 acres. A third development phase of this park is now underway with two additional phases anticipated for the future. A second community park is being planned in Eastern Dublin that would be bounded by Lockhart Lane, Gleason Drive, Fallon Road and Central Parkway. This is anticipated to include approximately 60 acres of land and would include primarily active sports fields. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 133 November 2004 Eastern Dublin Comprehensive Stream Restoration Program As required by the Eastern Dublin Specific Plan, the City of Dublin prepared a Comprehensive Stream Restoration Program in 1996. The purposes of this Program include establishment of streambank setbacks adjacent to Eastern Dublin creeks, provision of interface between development and creekbanks, provide for trails, connectivity and maintenance access adjacent to creeks, provisions for plant and animal habitat restoration within and adjacent to creeks, provision for protection of specimen trees, ensuring flood hazard protection adjacent to creeks, protection of surface water quality, ensuring channel stability, promote use of reclaimed water to irrigate restoration plantings and ensuring compliance with regulatory programs and requirements. Figure 8 contained in the Stream Restoration Program calls for development of a combination regional trail and maintenance road along the west side of Tassajara Creek, extending from the EBRPD park south of the project, along Tassajara Creek and into Contra Costa County to the north. A wildlife setback of 100 feet (minimum) is recommended from top of bank of Tassajara Creek. A varying width hydrological setback is also recommended from the top of creek bank.; however, the regional trail and maintenance road may extend into this setback area. Section 5.2 of the Plan (Trails and Maintenance Roads) notes that "trails and maintenance road planning should encourage a continuous open space network that integrates large natural open space areas, the stream corridors, and developed parks and recreation areas. The trails and open space network should then link regional and local trails, employment centers, residential areas, schools, parks, commercial centers, neighborhood centers and open space." Design and construction standards for trails and maintenance roads are provided in the Plan document. East Bay Regional Park District Master Plan In 1997, the East Bay Regional Park District adopted a Master Plan to define the mission and vision of the District. The Master Plan also explains the District's responsibilities and explains a framework for the decisions of the Board of Directors and staff. Accompanying the Master Plan is a map entitled "East Bay Regional Park District-Existing and Potential Parklands and Trails." The map depicts a future regional trail along a portion of Tassajara Creek, extending in an east-west direction along Dublin Boulevard, turning north along Tassajara Road, extending along the east side of Parks RFT A and then extending north into Contra Costa County. The District has recently modified the trail location from Parks RFTA to the Project site along Tassajara Creek. Significance Criteria. Park impacts are considered significant if construction of the proposed project would result in a demonstrable increase in the use of a local or community park, playground or recreational facility, or would conflict with an adopted agency park and recreation regulatory document, such as a park and recreation master plan. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 134 November 2004 Supplemental Impacts. Potential supplemental impacts identified in this DSEIR include adequacy of neighborhood parkland within the proposed Dublin Ranch West project and consistency of the proposed trail location with adopted regulatory plans. Adequacy of neighborhood parks. Construction of land uses as shown in the proposed Project would result in a potential supplemental impact over and above those addressed in the Eastern Dublin EIR dealing with the adequacy of local neighborhood parks within the proposed development since the Project includes elimination of planned parkland. There would also be an inconsistency with the City of Dublin's Park and Recreation Master Plan. The proposed Stage 1 Development Plan identifies one 8.7-acre (gross) Neighborhood Park, which is estimated to provide approximately 6.8 net, usable park acres, and 81.7 acres of open space within and adjacent to Tassajara Creek and on the western hillside areas. Much of the proposed Open Space-designated land would include land lying within Tassajara Creek or steeply sloping areas along the westerly portion of the property adjacent to Parks RFT A and would not be conducive to active recreation pursuits. No areas devoted to Neighborhood Squares are proposed. Based on information provided by the Dublin Parks and Community Services Department (conversation with D. Lowart, 11/1/04), the applicant for this Project has agreed to provide an additional 1.8 net acres of Neighborhood Park within the Dublin Ranch development east of the proposed Project, which would be over and above the park requirement for that development. The City of Dublin has agreed to credit this overage to the proposed Dublin Ranch West Project. Supplemental Impact PARK-I. Inconsistency with the City of Dublin General Plan, Eastem Dublin Specific Plan, and Park and Recreation Master Plan ("Plans') regarding provision of park acreage. With regard to proposed parks identified in the Plans, there would be a deficit of 1.04 net acres of Neighborhood Parks in the Project area. This is based on a net requirement of 10.5 acres for Neighborhood Parks, subtracting the proposed 7.66-acre Neighborhood Park proposed for the Project and further subtracting the 1.8 acres of parkland provided elsewhere in Eastern Dublin. Thus, there would be a deficit of 1.04 acres of land designated for Neighborhood Park on the Project site resulting in insufficient total potential parkland under the Plans. In this instance, inconsistencies with the Plans regarding provision of neighborhood park facilities would result in a supplemental potentially significant impact, since the total amount of parkland shown in the Project area would not be consistent with these regulatory documents. There would be a shortfall of 1.04 acres (net) of land designated for Neighborhood Park and Neighborhood Square on the Project site from the Parks and Recreation Master Plan. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 135 November 2004 The following measure is proposed to mitigate this impact to a less-than- significant level: Supplemental Mitigation Measure PARK-I. Prior to tentative map or Stage 2 Development Plan approval, whichever occurs first, the Project developer shall either: a) Revise the land use program for the Dublin Ranch West site to provide an additional 1.04 net acres of Neighborhood Parks land use designation; or b) Provide 1.9 net acres of Neighborhood Park land use designation in close proximity to the Project site. Provision of Trails. The proposed Stage 1 Development Plan for the Project (see Exhibit 11) would provide for approximately 10 acres of permanent open space along the Tassajara Creek stream course and elsewhere in the Project area greater than called for in the Eastern Dublin Specific Plan. Over eighty-one (81) acres of open space would be provided rather than 70 acres as shown in the existing Specific Plan. The proposed Stage 1 Development Plan would also provide for a local (subregional) trail adjacent to Tassajara Creek. This would be in addition to the planned EBRPD regional trail. The location and design of the local recreational trail would be determined as part of Stage 2 Development Plan reviews and necessary approvals from all appropriate biological regulatory agencies would be obtained prior to commencement of trail construction. This would include but would not be limited to the Army Corps of Engineers, U.S. Fish and Wildlife Service, State Department of Fish and Game, California Regional Water Quality Control Board. Therefore, the proposed Project would comply with mitigation measures dealing with the regional trails system and open space connections identified in the Eastern Dublin EIR and no supplemental impacts have been identified. The proposed trail location would also be consistent with the General Plan and Eastern Dublin Specific Plan, the recently updated City of Dublin Parks and Recreation Master Plan, the Eastern Dublin Comprehensive Stream restoration Program and the East Bay Park District 1997 Master Plan. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 136 November 2004