2015 Open Space Conference - Carlos Suarez - Drought and resiliency
HISTORICAL PRESERVATION, COASTAL RESILIENCY AND … · 2019. 12. 31. · • Civic Building/Flex...
Transcript of HISTORICAL PRESERVATION, COASTAL RESILIENCY AND … · 2019. 12. 31. · • Civic Building/Flex...
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HISTORICAL PRESERVATION, COASTAL RESILIENCY AND PUBLIC ACCESS: City of Alexandria, VA
States Organization for Boating Access 11th SEPTEMBER 2019
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Historic Context
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Early Years• Trading post
started mid-1600’s
• Port City from mid-
1700’s to 1860.
Official port of
entry for foreign
flagged vessels
• Exported tobacco,
wheat/breads, and
fish
• Part of the District of Columbia from 1789 to 1847
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Civil War Era• Under military
occupation
throughout the war
• Major supply depot
for war materials
• Waterfront building
converted to war
time hospitals and
infirmaries
• At end of war,
commercial trade
was minimal. Port
thrived on
government exports
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Industrial Era• The waterfront
continued to support
commercial and
military purposes after
civil war
• Shipbuilding was the
dominant activities
• WWI era US Naval
Torpedo Factory built.
Factories constructed
on waterfront to
support WWII effort
• Mid 20th century, the
port contracted -
supported delivery of
paper products
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Today’s Waterfront• Old Town Alexandria
designated historical district in 1966
• Initial waterfront plan crafted in 1965
• 1973 –Federal/City ownership dispute
• 1983 settlement agreement - 70% open space, rest for commercial development
• Limited residential development and closure of existing commercial waterfront MOFFATT & NICHOL I HISTORICAL PRESERVATION, COASTAL RESILIENCY, AND PUBLIC ACCESS: City of Alexandria
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Today’s Waterfront
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• Old Town Alexandria has rich maritime history: Preserve the historical
character of the waterfront
• Focus on maintaining public access to the waterfront: Adhere to the
1983 settlement agreement
• Address nuisance flooding and integrate resilience planning: Implement flood mitigation and future proof
• Support boat access to waterfront: Encourage public and new private
investment in waterfront.
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Challenges for the City
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Waterfront Master Plan
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• Revitalizing waterfront to showcase history, expand/enhance open spaces, improve public access, and ensuring compatible development
• Work initiated in 2008 and adopted in 2012. Refined in 2014
• Significant community and stakeholder involvement
• Phase 1 between Duke and Queen Streets
• Integrate separate studies on flood mitigation and boating access
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2012 Adopted Plan
2014 Refined Plan
OLIN
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Core Elements• Public Promenade
and lower boardwalk
for boating access
• Expanded Waterfront
Park
• King Street Pier/Water
Taxi
• Unified commercial
berths and transient
Slips
• Waterfront Steps
• Maritime Museum/Tall
Ship
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Point Lumley Park• Renovate existing
park
• Civic Building/Flex Space
• Children’s Garden with maritime history
• Open Performance Space/Bocce Courts
• South terminus of lower boardwalk
• Alexandria Seaport Foundation Museum and kayak launch facility
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Waterfront Park• Relocate ODBC
Building and Marina
• Outdoor Concert/
Festival/Movie Space
• Steps to Water
• Fitzgerald Square –
Icon Location
• King Street Pier with
shade structures
• Tall Ship Museum/Berth
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City Marina/ Torpedo Factory• Restructured marina
with floating docks
• Dedicated
commercial slips
• Permanent/transient
slips
• Shoreline stabilization
and promenade
• Dedicated
dockmaster building
and shadeMOFFATT & NICHOL I HISTORICAL PRESERVATION, COASTAL RESILIENCY, AND PUBLIC ACCESS: City of Alexandria
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Flood Mitigation
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Nuisance Flooding• City has struggled with
nuisance flooding since the late 1800’s.
• Low lying areas along the riverfront that were filled.
• Elevated tide levels backing through existing storm outfalls
• Rainfall contributes to flooding when river levels are high
• Frequency has increased to over 20 events per year.
• Flood mitigation to be integrated with Waterfront Plan
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Initial Studies• Initial study in 2007 to
identify contributing causes and elevations
• Follow up study in 2010 identified mitigation strategies
• Challenge to systematically raise grades leeward of bulkhead due to historic structures and meet road/sidewalk standards
• Preliminary solution based on benefit cost analysis - floodwall supplemented by pump stations for interior drainage
• Extend from RTS to Founders Park (Core Area)
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Integration-Waterfront Plan• Determination that EL.
6 feet NAVD (10-year return period) addressed most nuisance flooding
• Refine floodwall alignment to support pump stations
• New alignment also improves pedestrian access along the waterfront
• City Marina and commercial slips restructured
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Flood Wall Refinement• Poor geotechnical
condition,
constructability, and
concerns with
archeology
• Integration with
riverfront promenade.
• Maintain and enhance
boating access
• Reduce debris
accumulation
• Design for future
conditions
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Boating Study
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Boating Access• Waterfront Plan
developed to maintain and/or improve boating access
• Conduct regional market assessment to assess slip demand/ growth
• Developed marina siting plan (expansion waterward)
• Identified marina program
• Provided operational overview
MOFFATT & NICHOL I HISTORICAL PRESERVATION, COASTAL RESILIENCY, AND PUBLIC ACCESS: City of Alexandria
43.2%
35.3%
12.1%
6.8%
2.2%
0.4%
48.5%
30.2%
10.3%
8.2%
2.4%
0.5%
54.0%
20.1%
5.6%
14.0%
5.0%
1.3%
0% 20% 40% 60%
< 16 ft
16 to 20 ft
21 to 25 ft
26 to 39 ft
40 to 65 ft
> 65 ft
Percentage of Boats
Boat Use By Size
District of Columbia
VA
United States
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Transient Boating• City currently supports
transient boating in
conjunction with long
term lease slip holders
• Private development is
encouraged to
promote transient
docking
• Two opportunities
along the City’s
waterfront identified
(RTS and RTN)
• Boating Infrastructure
Improvement Grant
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Implementation
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First Phases• Park at 1 King Street
due to relocation of
ODBC
• Flood Mitigation Plan
finalized
• Relocation of Tall Ship
Providence
• Federal and State
Permit Efforts initiated
• Potential relocation of
federal channel
boundaries to expand
City’s water area
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HISTORICAL PRESERVATION, COASTAL RESILIENCY AND PUBLIC ACCESS: City of Alexandria, VA
States Organization for Boating Access 11th SEPTEMBER 2019