Laserfiche WebLink
TASK 7 -ENVIRONMENTAL AND <br />PERMITTING CONSTRAINTS SCREEN I NG <br />LEAD FIRM: ICF <br />CONTRIBUTING: K♦W <br />ICF will conduct a planni ng-level environmental <br />constraints screening analysis identifying preliminary <br />environmental considerations for each alignment <br />alternative under evaluation. The screening w ill rely on <br />readily available d esktop sources and does not include <br />technical a nalysis. modeling. or field surveys at t his <br />st age. T he prima ry objectives are t w ofold: identify any <br />critical resources t hat may requi re design avoidance <br />and therefore influence alignment select ion. and <br />provide a comparative assessment of env ironmental <br />constraints across t he alternatives. <br />IC F's screening w ill address t he following resource areas: <br />ag ri cult ura l farm lands; biological and aquatic resources <br />(including la nd cover mapping. special-status species <br />occurre nces. cri t ical habi tat. w etlands and waters, <br />sensitive vegetative communit ies. and conservation <br />areas); cultural resources (including a cult ural resource <br />records search, a Sacred La nds search and NAHC li st <br />rev iew; geology and seismicity including fault c rossings, <br />fau lt zo nes, and landslide suscept ibility; haza rdous <br />materials and w aste sites through DTSC EnviroSt or and <br />SWRCB Geo Tracker database searches within 100 feet <br />and 0.25 mile of eac h alternative; hydrology and water <br />resources including FE MA floodplain mapping; land <br />use including general p lan desig nat ions and zoning: <br />mineral resources based on state mapping: noise and <br />vibrat ion sensitive receptors: and parks, recreation , and <br />open space. K+W w ill contribute identification of major <br />ut ilities and public service facilities within the potential <br />alignment footprint s. <br />In addition to constra int identification, ICF w ill ident ify <br />t he likely environmental review and permits required <br />for each alternative under CEOA NEPA Section 404, <br />Section 401, and ot her applicable federal a nd state <br />e nvironme nta l regulations, and w ill flag any issues <br />w here early agency out reac h would be st rategically <br />b eneficia l prior to alignment selection. <br />Deliverables: Administ rat ive d raft , draft. and final <br />Environmental Constraints Screening Memorandum. <br />TASK 8 -UTILITY, DRAINAGE, AND RIGHT- <br />OF-WAY CONSIDERATIONS <br />LEAD FIRM: K♦W <br />CONTRIBUTING: S&W, RADIUS, AR/WS <br />K+W will ident ify major ut ility conflict s a nd assess <br />d rainage patterns and stormw ater considerations for <br />each alignment alternative. With nea rly 30 years of <br />project hist ory in t his corridor. K+Wbringsexisti ng record <br />research. as -built knowledge. and field familiari t y t hat <br />no ot her team wi ll have. <br />Where ut ility. drainage. o r rig ht -of-way considerat ions <br />require a hig her level of engineering scrutiny than <br />standard planning -level assumpti ons can support, the <br />team will flag t hose it ems explic itly so t he City can make <br />informed decisions about whe re additional analysis is <br />warranted before alignment selection. <br />The corridor presents a demanding concent rat ion <br />of k nown utility const raints including Zone 7 w ater <br />t ransmission mains, w ell and t reatment fac ili t ies, cross- <br />lake subsurface inf rast ructure, overhead pow er lines <br />t hrough t he chai n of lakes segment. and high -voltage <br />t ransmission lines para llel t o the Union Pacific lines. K +W <br />wi ll in itiate early coordi nat ion w ith Zone 7, PG&E. and <br />othe r utility providers to confi rm locations, understand <br />any future p lanned utility improvement p rojects in the <br />area. and establish re location scope. <br />Stormw ater management is a significant constrai nt <br />t hat must be resolved during t he init ial portion of this <br />project. T he corridor is subject to MR P 3 Provisions C.3 <br />and C.3.g, and a corridor-wide low impact development <br />t reatment st rategy must be d eveloped as part of t his <br />st udy rather than deferred to subsequent phases. <br />A critical early question is whet her t here is adequate <br />e levation to discharge stormw ate r to the Arroyo Mocho <br />via g ravity along t he full corridor length. We anticipate <br />a low poi nt near t he Union Pacific rai lroad c ro ss ing may <br />require a storm d rain pump station. <br />Schaaf & Wheeler will rev iew and selectively modify <br />existing flood models to assess d rai nage and floodplain <br />impact s for each alternative and wi ll evaluate Arroyo <br />Mocho's hydrau lic capac ity to accept additional project <br />d ischarg e in coordinat ion wit h Zone 7- <br />City of Pl easanton I El Charro Road Precise Roadw ay Alignmen t <br />Docusign Envelope ID: 776668AA-84FE-8E4D-81ED-F89B854166B8Docusign Envelope ID: 1E4E4FCF-7AB2-8687-82B4-D0B680FDBFDB