A Preferred Alternative: Hand Carry Boat Launch and Shoreline - - PowerPoint PPT Presentation

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A Preferred Alternative: Hand Carry Boat Launch and Shoreline - - PowerPoint PPT Presentation

Oct 10, 2023 351 likes •663 views

A Preferred Alternative: Hand Carry Boat Launch and Shoreline Stabilization Design Consolidations for the Bowdoinham Public Works Redevelopment Masterplan Richardson Associates, Baker Design Consultants, Town of Bowdoinham 11-20-2019 Meeting

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SLIDE 1

A Preferred Alternative:

Hand Carry Boat Launch and Shoreline Stabilization Design Consolidations for the Bowdoinham Public Works Redevelopment Masterplan

Richardson Associates, Baker Design Consultants, Town of Bowdoinham 11-20-2019

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SLIDE 2

Meeting Agenda

Review Public Design Feedback from 9-17-2019

  • Outcomes for Paddle Put in Preferences and Shoreline Stabilization Elements
  • Project Contexts
  • Hand Carry Launch - ADA and All Tides Float Design

* Plans and Sections * Hand Carry Elements

  • Shoreline Stabilization

* Areas of Stabilization Strategies * General Planting Palette * Sections and Character of Stabilization Strategies

  • Project Next Steps
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SLIDE 3

First Public Hearing Held on 9-17-2019

  • Community Consensus on ADA Paddle Put in as Preferred Design Option.
  • All tides accessible boat launch
  • Provide New and Numerous Kayak Racks for Community Use
  • Trailer Parking if Needed by General Parking Area, Car Access Close to Launch
  • Shoreline Stabilization Should Use All Stabilization Strategies, but at Appropriate Locations.
  • Mud is Not Bad! Natural Processes of the River Will Happen, Mud Flats are Not a

Negative for the Park; Safe and Functional Bank Structure Is Important.

  • Three Overlook / Interpretive “Pull Off” Areas (1 Bridge Overlook, 2 River Path Pull

Off Points, Fishing Compatible)

Design Public Hearing Review

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SLIDE 4

Maine Central R.R. Philip Mailly Waterfront Park & Boat Launch

Existing Shoreline with less impacts Mailly Waterfront Park Boat launch Existing Unstable Shore line and debris

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SLIDE 5

Masterplan

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SLIDE 6

Masterplan Background

Phase 1 Recommendations

  • General Site Restoration
  • Minimal Shore Stabilization
  • Limited Trails
  • Hand Carry Boat Launch, Parking,

and Storage Racks

  • Picnic Area
  • Car & Boat Trailer Parking
  • Access Road
  • Signage
  • Crosswalk / Safety
  • Landscape Planting
  • Connections to Rail Trail.
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SLIDE 7

Shoreline Access / Hand-Carry Boat Launch

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Existing Conditions

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SLIDE 9

Hand-Carry Boat Launch

1 Y R F L O O D P L A I N 75’ NRPA SETBACK DELINEATED WETLANDS Masterplan Line Work for Reference Temporary Gravel Drive Future Access Drive (8) Kayak Racks (3) Bollards Pre-Cast Concrete Planks Paved Approach (5% Max. Slope) 4’ Wide Path (4) 6’x16’ Floats + 12’x16’ Boat Launch Float (2) ADA Parking Spaces Parking Space Proposed Tree, TYP . ADA Boat Trailer Parking Space (Future Option)

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SLIDE 10

(4) 6’x16’ Floats w/ (1) ADA Boat Launch Float 4’ Depth –Riprap Stabilization

ADA Access Plan

18” x 12’ Pre-Cast Concrete Planks w/ curbing each side of ramp Riverbed Cleanup Area Paved Walkway (5% Max Slope) Delineated Wetlands Boundary & 75’ NRPA Setback (3) Kayak Storage Racks – 8 Boats / Rack (2) ADA Parking Spaces (1) ADA Boat Trailer Parking (2) Facility Use Signage (3) Traffic Bollards Temporary Access Drive Redevelopment Masterplan Linework for Reference, TYP Final Boat Launch Access Drive (Future Phase) Floating Dock in River Profile 4’ Wide Access Path, Typ. FEMA 100 Yr Flood Zone Highest Annual Tide Line

1 Y R F L O O D P L A I N DELINEATED WETLANDS

Floats Paved Launch Approach Pre-Cast Concrete Plank Boat Ramp

HIGHEST ANNUAL TIDE 2.9’ FEMA 100YR FLOODPLAIN 8.0’

Boat Ramp Section

60’-8”

Hand-Carry Elements Accessible Launch Section

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SLIDE 11

Shoreline Restoration and Shoreline Trail

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SLIDE 12

Existing Conditions

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Wetland Garden LEGEND Marsh Restoration Armored Slope Rootwad Stabilization Vegetated Retaining Wall Overlook Terminus/ Signage Locations Boat Launch 30’ Walkway Bridge 4’ Wide Shore Access Path Paired Bench Seating Overlook Spur Single Bench Seating Overlook Spur History Signage Shoreline Restoration Signage Wetland Vegetation Signage Temporary Gravel Drive Masterplan Line Work for Reference D e l i n e a t e d W e t l a n d s FEMA 100YR FLOODPLAIN Water Fowl & Fish Signage

Shoreline Stabilization

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SLIDE 14

Shoreline Trail Landscape Architectural Elements

  • Seating

(Benches: backless or backed, materials, setting locale)

  • Interpretive Signage

(Materials, Locations, Themes)

  • Pedestrian Pathway Bridge

(Type of Material, Construction Approach, Character)

General Deign Principles:

  • Affordable
  • Aesthetic
  • Ease of Maintenance and Durability

Shoreline Trail Amenities

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Seating

Backed - Wood Backless - Wood or Composite Backless - Wood

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Small Novelty Fixture Large Site Sign Structure Attached

Interpretive Signage

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Bridge Structure

Rustic - Wood, simple $ Engineered - High Span $$$$ High Span - Steel, simple $$

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Plant Design Principles

Planting Principles for planting selections:

  • Shoreline Stabilization Capability

(rooting structure and growth characteristics)

  • Beauty and Aesthetic Values

(Seasonal qualities, fmowering, texture, form)

  • Regionally Appropriate and Native Materials

(Planting Responds to Merry Meeting Bay plant communities and native Maine plants)

  • Wildlife Benefjts

(Food, cover, nesting, behavioral needs)

  • Maintenance and Masterplan Compatibility

(Maintenance needs and park design intentions) *Plants with a * by their name indicate species recommended by Maine Natural Areas Program

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SLIDE 19

Trees Shrubs Perennials

Upland Plant Community Elements

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Trees Shrubs Perennials

Red maple* Acer rubrum Yellow birch Betula alleghaniensis Speckled alder* Alnus incana Shadblow serviceberry Amelanchier canadensis Common witchhazel* Hamamelis virginiana Arrowwood viburnum Viburnum dentatum Huckleberry Gaylussacia baccata Highbush blueberry Vaccinium corymbosum Hay-scented fern Dennstaedtia punctilobula Sweetfern* Comptonia peregrina Bluejoint* Calamagrostis canadensis Broadleaf meadowsweet* Spiraea latifolia

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SLIDE 21

Bottomland Plant Community Elements

Trees Shrubs Perennials

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Trees Shrubs Perennials

Black willow* Salix nigra Red maple* Acer rubrum Speckled alder* Alnus incana Gray birch Betula populifolia Silky dogwood* Cornus amomum Sweet gale myrica gale Sheeps Laurel Kalmia angustifolia Winterberry Ilex verticillata Bluejoint Calamagrostis canadensis Lowbush blueberry Vaccinium angustifolium Goldenrod Solidago canadensis Sweet-scented joe-pye-weed Eutrochium purpureum

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Intertidal Zone

Grasses Perennials Feature Perennials

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Softstem bulrush* Schoenoplectus tabernaemontani Chair-maker’s rush Scirpus americanus Bluejoint Calamagrostis canadensis Northern Wild Rice* Zizania palustris (where appropriate) Common Arrowhead* Sagittaria latifolia Parker’s pipewort Eriocaulon parkeri Nodding beggartick Bidens cernua Northern Water plantain* Alisma triviale Pickerelweed* Pontederia cordata Cardinal fmower Lobelia cardinalis Blue iris Iris versicolor Yellow pond-lily Nuphar lutea

Grasses Perennials Feature Perennials

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SLIDE 25

Wetland Garden LEGEND Marsh Restoration Armored Slope Rootwad Stabilization Vegetated Retaining Wall Overlook Terminus/ Signage Locations Boat Launch 30’ Walkway Bridge 4’ Wide Shore Access Path Paired Bench Seating Overlook Spur Single Bench Seating Overlook Spur History Signage Shoreline Restoration Signage Wetland Vegetation Signage Temporary Gravel Drive Masterplan Line Work for Reference D e l i n e a t e d W e t l a n d s FEMA 100YR FLOODPLAIN Water Fowl & Fish Signage

Shoreline Stabilization

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Embankment Vegetated Wall

Vegetated Retaining Wall Section

Existing Wood Cribwork Ends Removed 4’ Wide Path and Overlook Spur

20’ Upland Vegetated Buffer

4” Topsoil, Wetland Seed Mix Covered with Jute Matting Stone Filled Vegetated Geotextile Retaining Wall Interpretive Signage Coir Logs with Helical Anchors Highest Annual Tide 2.9’ Existing Grade FEMA 100YR 8.0’

Vegetated Retaining Wall

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Marsh Restoration Section

Existing Wood Cribwork & Fill Removed 4’ Shore Access Path

10’ - 15’ Upland Vegetated Buffer 15’ - 20’ Freshwater Tidal Wetland

4” Topsoil, Wetland Seed Mix Covered with Jute Matting Reinforced Mat with Anchors Coir Logs with Wooden Stakes Highest Annual Tide 2.9’ Existing Grade FEMA 100YR 8.0’

Marsh Restoration

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Vegetated Bank

4’ PATH 25’ VEGETATED BUFFER 4” TOPSOIL, BROADCAST WETLAND SEED MIX & COVER WITH JUTE MATTING BURY BOTTOM 1/3 - 1/2 OF ROOTWAD INTO RIVER BED NATIVE PERENNIALS, SHRUBS, & TREES TREE ROOT WADS (DEBRIS MAY REQUIRE FULL DEPTH EXCAVATION VS. DRIVING TREES TO INSTALL)

LARGE BOULDER TO ANCHOR ROOT WAD

FRESHWATER WETLAND RESTORATION & UPLAND BUFFER SHORE LINE TRAIL

Former Public Works Garage

PAVILLION APPROXIMATION OF HAND BOAT LAUNCH / LIMITS OF LIVING SHORELINE RESTORATION WORK

Vegetated Bank

FEMA 100 YR FLOOD ZONE HIGHEST ANNUAL TIDE LINE DELINEATED WETLANDS BOUNDARY 75’ NRPA SETBACK

Vegetated Bank

Rootwad Stabilization Section

Existing Wood Cribwork Ends Removed 4’ Wide Path

25’ Upland Vegetated Buffer

4” Topsoil, Wetland Seed Mix Covered with Jute Matting Large Boulder to Anchor Root Wad Interpretive Signage Tree Root Wads Highest Annual Tide 2.9’ Existing Grade FEMA 100YR 8.0’

Rootwad Stabilization

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SLIDE 29

Armored Slope Section

Existing Wood Cribwork Ends Removed

25’ Upland Vegetated Buffer

4” Topsoil, Wetland Seed Mix Covered with Jute Matting Large Boulder Revetment Highest Annual Tide 2.9’ Existing Grade FEMA 100YR 8.0’

Armored Slope

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Schedule Review* if Funding Becomes Available

  • Design Development on Preferred Options Winter 2019
  • Permitting Winter 2019 / Early Spring 2020
  • Construction Documents Winter 2019 / Early Spring 2020
  • Bidding Late Spring 2020 / Early Summer 2020
  • Construction Late Summer 2020

Next Steps