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 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
Design Public Hearing Review 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)
Philip Mailly Waterfront Mailly Waterfront Park & Boat Park Boat launch Launch Existing Unstable Shore line and debris Maine Central R.R. Existing Shoreline with less impacts
Masterplan
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.
Shoreline Access / Hand-Carry Boat Launch
Existing Conditions
N (3) Bollards I A L P D Paved Approach O O (5% Max. Slope) L F R Pre-Cast Concrete Planks Y 0 0 1 (4) 6’x16’ Floats + 12’x16’ Temporary Boat Launch Float Gravel Drive Masterplan Line Work for Reference DELINEATED WETLANDS (8) Kayak Racks 4’ Wide Path Proposed Tree, TYP . Future (2) ADA Parking Spaces Access Drive 75’ NRPA SETBACK Parking Space ADA Boat Trailer Parking Space (Future Option) Hand-Carry Boat Launch
FEMA 100 Yr Flood Zone ADA Access Plan Temporary Access Drive (2) Facility Use Signage (3) Traffic Bollards 4’ Depth –Riprap Stabilization N I A 60’-8” L (4) 6’x16’ Floats w/ (1) ADA P Redevelopment Masterplan D O O Boat Launch Float L F Linework for Reference, TYP R Y 0 0 FEMA 100YR FLOODPLAIN 8.0’ 1 18” x 12’ Pre-Cast Concrete Planks w/ curbing each side of ramp HIGHEST ANNUAL TIDE 2.9’ Riverbed Cleanup Area Boat Ramp Section Paved Walkway (5% Max Slope) (3) Kayak Storage Racks – 8 Boats / Rack DELINEATED WETLANDS Delineated Wetlands Boundary & 75’ NRPA Setback Paved Launch Pre-Cast Concrete Plank Floats Approach Boat Ramp Floating Dock in River Profile Final Boat 4’ Wide Access Path, Typ. Launch Accessible Launch Section Access Drive (2) ADA Parking Spaces Highest Annual Tide Line (Future Phase) (1) ADA Boat Trailer Parking Hand-Carry Elements
Shoreline Restoration and Shoreline Trail
Existing Conditions
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 Temporary Gravel Drive History Signage Overlook Spur Single Bench Seating Shoreline Restoration Signage Overlook Spur Paired Bench Seating LEGEND Wetland Garden 4’ Wide Shore Access Path Marsh Restoration 30’ Walkway Bridge Armored Slope Wetland Vegetation Signage Rootwad Stabilization Boat Launch Vegetated Retaining Wall Water Fowl & Fish Signage Shoreline Stabilization Overlook Terminus/ Signage Locations
Shoreline Trail Amenities 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
Seating Backed - Wood Backless - Wood or Composite Backless - Wood
Interpretive Signage Small Novelty Fixture Large Site Sign Structure Attached
Bridge Structure Rustic - Wood, simple $ High Span - Steel, simple $$ Engineered - High Span $$$$
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
Upland Plant Community Elements Trees Shrubs Perennials
Trees Shrubs Perennials Red maple* Common witchhazel* Hay-scented fern Acer rubrum Hamamelis virginiana Dennstaedtia punctilobula Yellow birch Arrowwood viburnum Sweetfern* Betula alleghaniensis Viburnum dentatum Comptonia peregrina Speckled alder* Huckleberry Bluejoint* Alnus incana Gaylussacia baccata Calamagrostis canadensis Shadblow serviceberry Highbush blueberry Broadleaf meadowsweet* Amelanchier canadensis Vaccinium corymbosum Spiraea latifolia
Bottomland Plant Community Elements Trees Shrubs Perennials
Trees Shrubs Perennials Black willow* Silky dogwood* Bluejoint Salix nigra Cornus amomum Calamagrostis canadensis Red maple* Sweet gale Lowbush blueberry Acer rubrum myrica gale Vaccinium angustifolium Speckled alder* Sheeps Laurel Goldenrod Alnus incana Kalmia angustifolia Solidago canadensis Gray birch Winterberry Sweet-scented joe-pye-weed Betula populifolia Ilex verticillata Eutrochium purpureum
Intertidal Zone Grasses Feature Perennials Perennials
Grasses Feature Perennials Perennials Softstem bulrush* Pickerelweed* Common Arrowhead* Schoenoplectus tabernaemontani Pontederia cordata Sagittaria latifolia Chair-maker’s rush Cardinal fmower Parker’s pipewort Scirpus americanus Lobelia cardinalis Eriocaulon parkeri Bluejoint Blue iris Nodding beggartick Calamagrostis canadensis Iris versicolor Bidens cernua Northern Wild Rice* Yellow pond-lily Northern Water plantain* Zizania palustris (where Nuphar lutea Alisma triviale appropriate)
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 Temporary Gravel Drive History Signage Overlook Spur Single Bench Seating Shoreline Restoration Signage Overlook Spur Paired Bench Seating LEGEND Wetland Garden 4’ Wide Shore Access Path Marsh Restoration 30’ Walkway Bridge Armored Slope Wetland Vegetation Signage Rootwad Stabilization Boat Launch Vegetated Retaining Wall Water Fowl & Fish Signage Shoreline Stabilization Overlook Terminus/ Signage Locations
20’ Upland Vegetated Buffer Interpretive Signage FEMA 100YR 8.0’ Highest Annual Tide 2.9’ 4” Topsoil, Wetland Seed Mix Covered with Jute Matting Existing Wood Cribwork Ends Removed Vegetated Wall 4’ Wide Path and Overlook Spur Stone Filled Vegetated Geotextile Retaining Wall Coir Logs with Helical Anchors Existing Grade Embankment Vegetated Retaining Wall Section Vegetated Retaining Wall
10’ - 15’ 15’ - 20’ Upland Vegetated Buffer Freshwater Tidal Wetland FEMA 100YR 8.0’ Highest Annual Tide 2.9’ 4’ Shore Access Path Existing Wood Cribwork & Fill Removed 4” Topsoil, Wetland Seed Mix Covered with Jute Matting Reinforced Mat with Anchors Coir Logs with Wooden Stakes Existing Grade Marsh Restoration Section Marsh Restoration
FEMA 100 YR FLOOD ZONE DELINEATED FRESHWATER WETLAND RESTORATION & WETLANDS BOUNDARY PAVILLION UPLAND BUFFER 75’ NRPA SETBACK SHORE LINE TRAIL Former Public Works Garage Interpretive Signage 25’ Upland Vegetated Buffer FEMA 100YR 8.0’ Highest Annual Tide 2.9’ HIGHEST ANNUAL APPROXIMATION OF HAND BOAT LAUNCH / LIMITS OF 4’ Wide Path TIDE LINE LIVING SHORELINE RESTORATION WORK Vegetated Existing Wood Cribwork Ends Removed 4” Topsoil, Wetland Seed Mix Covered with Jute Matting 25’ VEGETATED BUFFER 4’ PATH Vegetated Large Boulder to Anchor Root Wad Rootwad Stabilization Section Tree Root Wads Existing Grade Bank NATIVE PERENNIALS, SHRUBS, & TREES Bank Rootwad Stabilization 4” TOPSOIL, BROADCAST WETLAND SEED BURY BOTTOM 1/3 - MIX & COVER WITH JUTE MATTING 1/2 OF ROOTWAD INTO RIVER BED TREE ROOT WADS (DEBRIS MAY REQUIRE FULL DEPTH EXCAVATION VS. DRIVING TREES TO INSTALL) Vegetated Bank LARGE BOULDER TO ANCHOR ROOT WAD
25’ Upland Vegetated Buffer FEMA 100YR 8.0’ Highest Annual Tide 2.9’ Existing Wood Cribwork Ends Removed 4” Topsoil, Wetland Seed Mix Covered with Jute Matting Large Boulder Revetment Armored Slope Section Existing Grade Armored Slope
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