Portola Valley

Introduction

Portola Valley is a residential community of 4,462 in southern San Mateo County. Since the City is not located within Santa Clara County, the District's collaborative efforts with Portola Valley are limited. However, the city lies within the San Francisquito watershed and partners with the District on some local natural flood protection and stewardship projects.

Shared Responsibilities

Most policies guiding development and use of resources in Portola Valley are contained in the City's General Plan.

 

Looking forward, further collaboration or partnership will facilitate sustainable development in the region, particularly in the following areas:

When evaluating land use decisions:

  • Assess and plan for changes in water demand and storm water management, especially taking into account how urbanization affects the water cycle.
  • Decrease the demand for water.
  • Expand water use efficiency in existing and new development.
  • Actively pursue and facilitate the use of recycled water.
  • Protect and expand local water supplies.
  • Protect groundwater basins and source water protection zones.
  • Reduce flood risk.
    • Site new construction to assure stable stream channels and minimize flood risk.
    • Require that new construction in flood prone areas be built to flood safe standards.
  • Protect natural stream functions.
    • Restore fisheries, riparian habitat, and wetland areas.
    • Explore opportunities for increased creek-side trails and open space.

During operations of existing facilities or services:

  • Manage local storm drainage systems with stream capacity to contain floodwaters.
  • Support measures to reduce the exposure to flood risk.
  • Support measures to enhance flood preparedness and knowledge of risk exposure.
  • Prepare critical facilities for operations during flood events or prolonged draught.
  • Reduce pollutants entering streams.

Maps

The interactive map below shows the location of Portola Valley and illustrates some of the city's key features, such as major creeks, flood zones and groundwater subbasins.

To view key features, choose a layer from the "Select a layer to display" menu on the map below. You can select multiple layers to view at one time; if you wish to turn off a layer, select it again from the menu. Individual layers contain specific data that you can access by clicking on the layer itself.

 


 

 

Key Water Resources Features

Citywide Programs and Projects

The City and the District collaborate on projects to maintain the health of the watershed and water quality, establish natural flood protection and provide access to open space and trails.

 

Related Plan Elements

The Related Plan Elements listed below identify some of the District strategies  applicable to the city. They provide the basis for cities to provide better management of key water resources features within their jurisdictions and to work more effectively with the District to address water resources managemenet issues.

Related Plan Elements

ROLESTRATEGIES
District Advocates
E-3.1.1.3: Provide technical advice and, if appropriate, work with municipalities to manage stormwater to address stream flooding and environmental benefits. (T)
District Advocates
E-3.1.2.2: Support and promote land use decisions to maintain stream capacity. (T)
District Collaborates
E-3.2.1.3: Assist municipalities and citizens when needed to lessen potential flood impacts. (C)
District Collaborates
E-3.2.1.4: Include municipal planners in regional or local flood management planning activities. (C)
District Collaborates
E-3.2.1.6: Include municipal planners in regional or local flood management planning activities.
District Advocates
E-3.2.2.2: Encourage and provide technical assistance in mitigating erosion, sedimentation and high flows from new development or redevelopments. (T)
District Advocates
E-3.2.2.4: Promote awareness of risks for developing in flood hazard areas. (T)
District Has Primary Jurisdiction
E-4.1.1.1: Balance the protection and restoration of sensitive fisheries and aquatic species, such as steelhead trout, with a reliable water supply. (P)
District Advocates
E-4.1.1.4: Provide information on stormwater management and design of floodplains and channels. (T)
District Has Primary Jurisdiction
E-4.1.2.4: Protect groundwater recharge areas in creeks and riparian corridors. (P)
District Collaborates
E-4.1.2.5: Protect, enhance and restore riparian vegetation and in-stream and tidal habitat conditions conducive to healthy ecology, including diked historical bayland wetlands, or former salt ponds. (P and C)
District Has Primary Jurisdiction
E-4.2.1.3: Protect and preserve groundwater recharge areas.(P)
District Collaborates
E-4.2.2.4: Reduce pollutants in streams from urban runoff and minimize the effects on surface and ground water.
District Collaborates
E-4.3.1.1: Work with other entities for planning, design, construction, maintenance, and operation of trails/open space amenities.
District Collaborates
E-4.3.1.2: Increase public access to District lands as appropriate; extend trails network.
District Has Primary Jurisdiction
E-4.3.1.3: Support creek-side or water related recreation, as appropriate.