De Devils Slide Coastal T vils Slide Coastal Trail Improvements - - PowerPoint PPT Presentation

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De Devils Slide Coastal T vils Slide Coastal Trail Improvements - - PowerPoint PPT Presentation

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De Devils Slide Coastal T vils Slide Coastal Trail Improvements Project ail Improvements Project County of San Mateo Project History Measure T Nov.1996 Plans and Permits Task Force meetings Hired a team Board support

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De Devil’s Slide Coastal T vil’s Slide Coastal Trail Improvements Project ail Improvements Project

County of San Mateo

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Devil’s Slide Coastal Trail Improvements Project

Project History

  • Measure T Nov.1996
  • Plans and Permits
  • Task Force meetings
  • Hired a team
  • Board support
  • Budget
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Devil’s Slide Coastal Trail Improvements Project

Project Overview

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Devil’s Slide Coastal Trail Improvements Project

Programming and Linkages

  • Park hours
  • Multi use trail
  • Pedestrians
  • Equestrian
  • Bicycle
  • Dogs on leash
  • Future trail linkages
  • Caltrans parking lot
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Devil’s Slide Coastal Trail Improvements Project

Public Comment Process

  • Received comments in the following

topic areas on 30% drawings

  • Programming and trail linkages
  • Paving surface durability and safety
  • Equestrian access
  • K-rail improvements
  • Trail safety
  • Bird protection fencing aesthetics
  • Today’s presentation of 90%

drawings will attempt to address these comments

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Devil’s Slide Coastal Trail Improvements Project

Next Steps

  • Transfer title to County

(August 2013)

  • Board of Supervisors approval

(October 1st)

  • Construction

(Winter 2013/ 2014)

  • Trail opening

(March 2014)

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Devil’s Slide Coastal Trail Improvements Project

Presentation Overview

  • Pavement, Striping,

Signage & K-rail, and Other Improvements

  • Environmental Review

& Overlooks

  • Maintenance, Schedule

& Next Steps

  • Questions

Roland Haga, P.E, LEED AP BKF Engineers Sarah Sutton, ASLA, LEED AP, The Planning Center | DC&E Gary Lockman County of San Mateo Project Team

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Devil’s Slide Coastal Trail Improvements Project

Overview of Trail Improvements

  • 1.3 Mile Trail
  • Paving and Striping
  • Signage/Interpretation
  • Accessibility
  • Accessibility
  • K-Rail Improvements
  • Overlooks
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Devil’s Slide Coastal Trail Improvements Project

Paving/ Striping

  • 6’ bike lanes each way
  • 10-12’ pedestrian/

equestrian

  • Repair and resurface

existing asphalt pavement (microsurfacing)

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Devil’s Slide Coastal Trail Improvements Project

Before K-Rail simulation

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Devil’s Slide Coastal Trail Improvements Project

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Devil’s Slide Coastal Trail Improvements Project

Microsurfacing

  • Prevents pavement

degradation- seals underlying surface from water and air intrusion

  • More skid resistant than

slurry (micro 0.8 vs. slurry 0.5 friction coefficient)

  • Longer lifespan than slurry

(5-7 years vs. 3-5 years)

  • Widely used throughout Bay

Area and California

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Devil’s Slide Coastal Trail Improvements Project

Paving and Striping

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Devil’s Slide Coastal Trail Improvements Project

User Safety

  • Signage
  • Speed limit paint on trail pavement

and posted on each end

  • Horse signs posted at each trailhead
  • K-rails and cable fencing

keeping people back from cliff edge

  • 2’ buffer between bike lane and

K-rail

  • Ambassadors- verbal warnings
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Devil’s Slide Coastal Trail Improvements Project

Signage

  • Remove existing

roadway signage

  • New regulatory

signage (minimize number, and location to protect views)

  • Interpretive panels
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Devil’s Slide Coastal Trail Improvements Project

Accessibility Improvements

  • Bathroom & drinking

fountains (north and south trailheads)

  • Interpretive panels
  • Overlooks
  • Observation scopes
  • ADA access

provided to

  • verlooks from

parking per County trail standards

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Devil’s Slide Coastal Trail Improvements Project

K-Rail Improvements

  • Moving K-rail for smooth

trail edge

  • Removing limited K-rail to

expose old rock wall

  • Power wash and paint tan
  • Clear debris and weeds

along K-rail

  • Future opportunities

artistic teaming/ fundraising

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Devil’s Slide Coastal Trail Improvements Project

Environmental Review

  • May 2002 EIS/EIR supplement

to 1986 certified by Caltrans

  • Sept. 2004 California Coastal

Commission upheld July 2004 approved CDP

  • Trail improvements are

consistent with CDP

  • Project will provide

memorandum including detailed analysis of biological resources

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Devil’s Slide Coastal Trail Improvements Project

Potential Wetlands

  • Four potential

Wetlands

  • Two require K-rail

relocation

  • Supervision of a

qualified wetland biologist

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Devil’s Slide Coastal Trail Improvements Project

Bird Nesting Protection

  • Trail is directly adjacent to

important bird nesting locations

  • Birds are acclimated to

vehicular traffic only

  • Views of pedestrians may

cause nests to be abandoned

  • Bird nest protection is

critical

philseu.blogspot.com/2011/

Bird species include: Peregrine Falcon, Murres, Brandt’s, Pelagic Cormorants, Western Gulls, Pigeon Guillemots, Brown Pelicans

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Devil’s Slide Coastal Trail Improvements Project

Bird Nesting Protection

  • 2011 Common

Murre Report recommends visual barrier

  • Nesting season

January- September

  • Year round

fencing option is preferred

Sensitive Nests/ Breeding Areas Visual Barrier

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Devil’s Slide Coastal Trail Improvements Project

Bird Nesting Protection

  • Movable blinds- view &

maintenance concerns, not required due to line of sight

  • 6’ Chain-link fencing-

aesthetic concerns

  • Clear fencing-

maintenance concerns

  • Cable fencing- climbing

concerns

  • Preferred Option- 4’ Tall

mesh with vegetation behind

sierrafencetx.com www.yaboofence.com www.crl-arch.com

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Devil’s Slide Coastal Trail Improvements Project

Bird Nesting

Similar fence example showing transparency

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Devil’s Slide Coastal Trail Improvements Project

Bird Nesting Protection

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Devil’s Slide Coastal Trail Improvements Project

Bird Nesting Protection

  • 4’ tall mesh fencing
  • Durable vandal proof

wire

  • Small mesh openings

and top spikes difficult to climb

  • See-through

transparent panels

  • Galvanized steel with

black powder coating finish 10 year warranty

4’ Omega Secur Fence

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Devil’s Slide Coastal Trail Improvements Project

Before photo

  • f trail
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Devil’s Slide Coastal Trail Improvements Project

After photo simulation of trail (BKF)

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Devil’s Slide Coastal Trail Improvements Project

Bunker

  • Historic value
  • Site protection

fencing

  • 6’ high mesh

fencing and gate

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Devil’s Slide Coastal Trail Improvements Project

Northern Overlook

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Devil’s Slide Coastal Trail Improvements Project

Northern Overlook

Plan view color

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Devil’s Slide Coastal Trail Improvements Project

Northern Overlook

Plan view color

  • Added 2 benches

and included in wall design

Similar approach

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Devil’s Slide Coastal Trail Improvements Project

Northern Overlook

  • Replaced chain-link

with relocated K-rail for aesthetics

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Devil’s Slide Coastal Trail Improvements Project

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Devil’s Slide Coastal Trail Improvements Project

Northern Overlook

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Devil’s Slide Coastal Trail Improvements Project

Northern Overlook

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Devil’s Slide Coastal Trail Improvements Project

Northern Overlook

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Devil’s Slide Coastal Trail Improvements Project

Material Palette

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Devil’s Slide Coastal Trail Improvements Project

Material Palette

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Devil’s Slide Coastal Trail Improvements Project

Interpretive Area

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Devil’s Slide Coastal Trail Improvements Project

Interpretive Area

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Devil’s Slide Coastal Trail Improvements Project

Interpretive Area

Plan color

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Devil’s Slide Coastal Trail Improvements Project

Interpretive Area

Plan color

  • Added 3 benches
  • Added 1 interpretive

sign

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Devil’s Slide Coastal Trail Improvements Project

Interpretive Area

Section color

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Devil’s Slide Coastal Trail Improvements Project

Interpretive Area

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Devil’s Slide Coastal Trail Improvements Project

Southern Overlook

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Devil’s Slide Coastal Trail Improvements Project

Southern Overlook

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Devil’s Slide Coastal Trail Improvements Project

Southern Overlook

Plan color

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Devil’s Slide Coastal Trail Improvements Project

Southern Overlook

Plan color

  • Moved observation scopes
  • Added 2 interpretive signs
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Devil’s Slide Coastal Trail Improvements Project

Southern Overlook

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Devil’s Slide Coastal Trail Improvements Project

Southern Overlook

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Devil’s Slide Coastal Trail Improvements Project

Future Maintenance

  • Bird monitoring
  • Wetland monitoring
  • Pampas grass removal
  • Rock removal
  • Rock slide repair

(funding and expectations)

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Devil’s Slide Coastal Trail Improvements Project

Questions/ Comments

  • Gary Lockman

County of San Mateo

  • Roland Haga, P.E, LEED AP

BKF Engineers

  • Sarah Sutton, ASLA, LEED AP,

The Planning Center | DC&E

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De Devil’s Slide Coastal T vil’s Slide Coastal Trail Improvements Project ail Improvements Project

County of San Mateo