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Portola Valley committee seeks cost estimate from Cottonshers, advances plan to digitize and georeference town geologic maps
Summary
Committee members voted to seek a cost estimate from Cottonshers to update the town's geologic and ground-movement-potential maps, discussed digitizing geotechnical reports, and reviewed preliminary local survey data that may inform future map changes.
The Portola Valley Geologic Safety Committee agreed to pursue a cost estimate from Cottonshers for updating the town's geologic and ground‑movement potential maps and to explore options for digitizing the town's geotechnical reports. Members highlighted gaps between the town's map products and the potential value of a georeferenced GIS layer for planning and evacuation mapping.
Why it matters: committee members said updated, georeferenced maps would allow officials and residents to overlay alternate fault interpretations, toggle USGS/CDMG layers, and better plan evacuation routes and infrastructure resilience. Several speakers noted that many…
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