Stabilization Study. Prepared For: The Town of Bethlehem. Henry Hudson Park Shoreline Stabilization Study. June 2011

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1 Henry Hudson Park Shoreline Stabilization Study Prepared For: The Town of Bethlehem 1

2 Company Introduction - OCC Ocean and Coastal Consultants (OCC) is a 50 person engineering consulting firm that specializes in providing marine-related professional services. OCC was founded in 1983 and has offices in Connecticut, New Jersey, Massachusetts and South Carolina. They have extensive Hudson River project experience and has performed similar studies along public waterfront parks throughout the East Coast. Some of the types of services OCC provides include: Marina/Waterfront Planning & Design Structural & Geotechnical Engineering Regulatory Services Coastal Engineering & Coastal Resource Evaluations Dredging/Civil Engineering Underwater Dive Inspections Construction Administration/Resident Engineering IT/GIS Database Development 2

3 Presentation - Outline History Shoreline Segments Path Forward Shoreline Analysis Approach & Results Recommendations 3

4 Henry Hudson Park History 1860s 1900s Army Corps of Engineers built w/ Dredged Spoils & Timber Cribbing Shoreline Capped w/concrete 2006 Hudson River Shoreline Restoration Alternative Analysis 2006 Town completed its Local Waterfront Revitalization Program (LWRP) 2007 Completed Master Plan AwardedNYSDEC HudsonProgram Grant 2010 Town applied for a USACE Permit for the Floating Fishing Platform 2011 OCC Performed Study Fishing Platform to be constructed this Summer 4

5 Shoreline Analysis Approach 5

6 Shoreline Analysis Approach Site Constraints & Project Requirements Ground/Soil Conditions Regulatory Requirements Erosion Protection Aesthetics/Public Views Environmental Impacts Public Access/Walkway Provisions Upland & Adjacent Uses Construction Considerations Cost Durability & Maintenance Tradition Soil Type (water, land) Permitting, Boundaries, Materials Effectiveness against site conditions, wake Appearance Wildlife, Water Quality Access to Water, Future Surcharge Loads, Space Material Availability, Installation Materials, Labor, Installation Longevity, Upkeep Typical Methods Used in Area 6

7 Shoreline Analysis Approach Assigned Importance Rating Critical Cost Regulatory Requirements Erosion Protection Public Access/Walkway Provisions Important Environmental limpacts Upland & Adjacent Uses Durability & Maintenance Construction Considerations Ground/Soil Conditions Consideration i Aesthetics/Public ti Views Tradition 7

8 Shoreline Analysis Shoreline Alternatives Evaluated Rock Riprap Revetment Timber Bulkhead Vegetated Geogrid Live Crib Wall Joint Planting 8

9 Shoreline Analysis Approach Rated Selection Factor to Alternatives Score of 1 to 4 4 most suitable Suitability for each Project Requirement Question/Example: Which shoreline alternative is the most economical? Rock Riprap Revetment 4 9

10 Shoreline Analysis Approach Shoreline Alternative Results #1 - Rock Riprap Revetment #2 - Joint Planting 10

11 Shoreline Analysis Approach Joint Planting 11

12 Shoreline Segments 1 2

13 Shoreline Inventory Segment A Segment A "Overlook Area" 13

14 Existing Conditions Segment A "Overlook Area" Northern Portion (A1) 14

15 Existing Conditions Segment A "Overlook Area" Southern Portion (A2) 15

16 Recommended Use Segment A "Overlook Area" Future Kayak Launch Existing Use Sheltered Location 16

17 Shoreline Inventory Segment B Segment B "Boat Launch Area" 17

18 Existing Conditions Segment B "Boat Launch Area" Boat Launch Seasonal Floating Docks Rock Riprap Revetment 18

19 Shoreline Inventory Segment C Segment C "Fishing Platform Area" 19

20 Existing Conditions Segment C "Fishing Platform Area" Causing Walkway to Break apart Detached Concrete Cap 20

21 Future Use Segment C "Fishing Platform Area" To be Installed Summer

22 Shoreline Inventory Segment D Segment D "Picnic Area(s)" 22

23 Existing Conditions Segment D "Picnic Area(s)" June 2007 April 2011 Detached Concrete Cap 23

24 Shoreline Inventory Segment E Segment E "Play Area" 24

25 Existing Conditions Segment E "Play Area" Detached Concrete Cap 25

26 Shoreline Inventory Segment F Segment F "Large Group Picnic Area 1" 26

27 Existing Conditions Segment F "Large Group Picnic Area 1" June 2007 April 2011 Failed Wall Severe Upland Erosion 27

28 Shoreline Inventory Segment G Segment G "Large Group Picnic Area 2 & Fire Dock" 28

29 Existing Conditions Segment G "Large Group Picnic Area 2" Failed Wall Severe Upland Erosion 29

30 Future Use Segment G "Large Group Picnic Area 2" Fire Dock Bethlehem h Fire Department Quick Road Access Fire Dock 30

31 Shoreline Inventory Segment H Segment H "Large Group Picnic Area 3" 31

32 Existing Conditions Segment H "Large Group Picnic Area 3" Loss of Material Underneath Cap Minor Upland Erosion 32

33 Shoreline Recommendations ROCK RIPRAP REVETMENT HIGH PRIORITY Segment C "Fishing Platform Area" Segment D "Picnic Area" Segment G "Large Group Picnic Area 2" MEDIUM HIGH PRIORITY Segment F "Large Group Picnic Area 1" 33

34 Shoreline Recommendations JOINT PLANTING HIGH PRIORITY Segment E "Play Area" MEDIUM PRIORITY Segment H "Large Group Picnic Area 3" 34

35 Shoreline Recommendations SOFT VEGETATION HIGH PRIORITY Segment A1 Northern Section of "Overlook Area" LOW PRIORITY Segment A2 Southern Section of "Overlook Area" 35

36 Shoreline Recommendations SOFT VEGETATION SEGMENT A1 1. Restrict Pedestrian Access 2. Cut Back Slope (to a 30 degree ee angle) 3. Plant Vegetation LOWER WATERLINE: Emergent aquatic plants MID WATERLINE: Woody & emergent flood tolerant shrubs TOP BANK: Flood tolerant moist soil trees 4. Relocate Kayak Launch Temporarily to Segment B "Boat Launch" until Segment A stabilizes. 36

37 Moving Forward Opinion of Probable Project Costs Construction Costs $2.4M Design Fees $100,750 Total Cost: $2.5M W/O Segment A: $1.8M 37

38 Moving Forward Next Project Steps Apply for Grants Site Surveys Additional Geotechnical Site Investigation Bidding Detail Design Regulatory Permitting Construction 38

39 Any Questions? Contact: Kelly Rutkowski Ocean & Coastal Consultants 35 Corporate Drive Trumbull, CT O: (203) M: (571) F: (203)

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