Transcript
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City of Hampton ComprehensiveWaterways
Plan Development
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Work Session Agenda Review Committee mission and objectives
Introduce support resources Review relationship with Community Planning Process
Review Proposed Operating Agreement
Receive Overview of Key Topics
Review Community Engagement Components Review Project Outline and Briefing Schedule
Review Past Studies
Review Arrangements for Community Listening Schedule
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Plan Support Team Consultant Support to Committee
Project Support Director: Ken Dierks, Kimley-Horn and Associates(KHA)
Facilitation: URS Fred Whitley, P.E., (facilitator)
Technical Support: Karl Mertig (KHA), John Paine, (URS), RebeccaFrancese, REM, Waterways Surveys and Engineers
Public Involvement Program: Betsy McBride, Todd Solomon, HamptonRoads Center for Civic Engagement
Cooperating Partners
Virginia Institute of Marine Science Carl Hershner, Marsha Berman Hampton Roads Planning District Commission John Carlock and staff
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City Council
City StaffSteering
CommitteePublic
Outside
Agencies(VIMS, COE, HRPDC)
Consultants(KHA/URS/HRCCE)
City of Hampton
Comprehensive Waterways Management Plan
Project Team Organizational Chart
Primary Points of Contact
City Staff: Pete Petersen, Lynn Allsbrook, Chuck
Fleming, Terry ONeill, Gayle Hicks
Consultants: Ken Dierks, KHA, Fred Whitley, URS,
Rebecca Francese, WSE, Betsy McBride, HRCCE
Outside Agencies: Carl Hershner, VIMS, JohnCarlock, HRPDC
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Key Briefing Topics
Sea Level Rise/Changing Weather Patterns
Flooding and Flood Insurance Stormwater Management/Water Quality Compliance
Shoreline Protection
Waterways Management (Navigation/Dredging)
State and Federal Agency Perspectives (Regulation &Funding)
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Draft Schedule Nov 30 - Organizational Meeting
Early January 2011: Community Listening Session
Balance of January: Topic Background Briefs Feb March 2011: Detailed discussion sessions
(subcommittee meetings)
April 2011: Steering Committee discussion on draft
recommendations Early May 2011: Community Checkpoint Meeting -
Late May 2011: Committee meetings to reviserecommendations to Council
June 2011: Committee Presentation to Council
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Community Engagement
Plan
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Sea-Level Rise Hampton Roads has the highest NOAA current and predicted sea
level increase on the East Coast. Estimates range from at least 2.3and possibly up to 5.2feet in the
next 100 years with 4.4 currently predicted. Substantial areas of Hampton could be inundated during storms
affecting: Life and safety Environmental quality
Flood insurance availability and cost Property habitability, values and tax base Stormwater conveyance system function - inundation Stormwater system treatment effectiveness Capital facilities priorities and budgets
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Virginia
Hurricanes Only
All Tropical Cyclones
1933 Hurricane
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Hurricane Stats SE Va.
Tropical Cyclones by Year
Hurricane Return Period
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Storm Tide Facts Eleven of the highest tides on record have occurred during the past 10
years.
Five of the top 8 storms have occurred in the past 12 years
Any storm ranked at #8 or higher probably caused flooding of low lying
properties Onesignificant high tide in the 1970's (Apr. 1978 - rank #9)
Twosignificant high tides in the 1980's (Oct. 1982 & Apr. 1988 - ranks #17and #22)
Sixsignificant high tides in the 1990's - one ranked at #8 or higher
Seven significant high tides in the 2000's - four ranked at #8 or above
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Hurricane ThreatsSTORM SURGE STORM INTENSITY
CAT 2 NNW 20 mphCAT 2 NNW 20 mph
CAT 1 NNW 20 mphCAT 1 NNW 20 mph
CAT 3 NNW 20 mphCAT 3 NNW 20 mph
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Issue Summary Affects all other issues
Long term likelihood of increased flooding frequency and durationthroughout the City
Inundation of existing drainage systems
Will create long term capital needs for system modifications to deal withinundation and flooding
Affects flood zone designation and flood insurance
Must be factored in to any future stormwater quality improvement measures Poses hazard mitigation policy issues for recurrent flooding areas
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Background Over 50% of the city is below the 8 contour and susceptible to
flooding
FEMA has updated flood plain maps which are currently outfor public comment
New maps will be adopted by Council in 2011
City has applied for the Community Rating System (CRS) toidentify measures to reduce flood loss thereby reducing floodinsurance premiums
City has just finished public hearings on new floodplainordinance.
Peninsula Hazard Mitigation Plan is being updated
City about to hire Hazard Mitigation staff
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July 14, 2010 FIRM Map Update
Net Change from Maps 1,740
properties with a house or structure added to the new AEzone
2,734 properties with land affected by the new AE zone without
touching the main structure on the property
2,568 properties with a house or structure left out of the new AE
zone
212 properties in the new floodway
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Issue Summary Public has expressed strong and clear concerns about
restricting building in the 100 year floodplain
City will need to adjust offset above Base Flood Elevation inthe future
Sea level rise will require other changes in the zoningordinance for development in the flood zone
City will need to identify flooding threats to HAZMAT sitesand key municipal infrastructure
Likely long term demand on City resources to implementhazard mitigation program
Potential shrinking federal support for flood protection andhazard mitigation
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Stormwater Management
Regulations MS-4 Permit Renewal Stringent new conditions anticipated
for discharge of stormwater from municipal storm sewers.Currently being negotiated with DCR & EPA
Chesapeake Bay Total Maximum Daily Loading (TMDL) pollution diet requiring stormwater reduction and treatmentthrough Watershed Implementation Plans (WIPS) in 2011.
State Stormwater Regulation Amendments new stormwaterquality discharge requirements affecting new development and
requiring local administration of Stormwater General PermitProgram.
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Challenges Estimated TMDL compliance costs for Chesapeake Bay
TMDL exceed 1.1 billion (HRPDC)
Public infrastructure/property will bear a disproportionate
burden of water quality retrofits due to limitedredevelopment demand in future.
Huge demand on capital budget lack of adequatefunding sources. Federal funding may shrink.
Challenge to effectively regulate but not chase away newdevelopment
City will inherit management of stormwater general
permit program including program costs
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Shoreline ManagementChallenges (Ownership) Bay Fronting Shoreline ~ 8.3 Miles
(South tip of Fort Monroe to North End Point)
Federal - Fort Monroe (29%) Public Buckroe, Salt Ponds, Grandview Nat Pre (44%)
Private Thimble Shoals Court, Malo Beach, WhiteMarsh, Grandview (27 %)
Fort Monroe and the Nature Preserve (59%) are roughly thesame length at opposite ends of the shoreline.
Central 41% of the shoreline is interspersed private and publicownership with an inlet segmenting the reach.
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Shoreline ManagementChallenges (Feasibility/Cost Benefit)
Limited Federal Funding for shoreline projects
Even more limited State Funding
Public Dollars Public Property In the past Thimble Shoals and Malo Beach residents have
been highly resistant to grant access easements for shorelineprotection projects. (They receive secondary benefits frompublic projects ie. beach re-nourishment.)
Grandview residents may have more incentive, but in the pastB/C ratios for projects on that reach have been minimal.
In terms of B/C ratios - Recreation and Habitat aresecondary to Storm Damage and Flooding Protection.
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Shoreline ManagementGoals Storm Protection/Damage Reduction
Flood Protection / Damage Reduction
Recreation Habitat Preservation/Enhancement
The priority may vary depending on the individual reach.
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Shoreline ManagementCant physically stop storm tides and sea level rise so we
have to plan and manage for the affects.
StrategiesHold the Line
Hard shoreline alternatives seawalls and revetment
Enhanced Dunes (geotube or rock cores)
Shoreline Buffers
Beach re-nourishment and living shorelines
Hydrodynamic Alterations breakwaters, groins, jetties
Possibly near shore reefs/near shore disposal
Composite Strategies
Combination of strategies
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Dredging and Navigation
Maintenance
City has Major claim on capital budget for long termmaintenance
2007 estimate for 9 largest projects was $30M in new andnext maintenance dredging not counting out year costs
Hampton River, Back River, Salt Ponds, are major focus
Salt Ponds maintenance cost $1.1M since June 2003
City currently bearing all the cost with no off-setting tax
source other than General Fund Economics of dredging often dont work (no positive
B/C ratio)
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Issue Summary Need long term navigation maintenance plan
Identify new sources of funding for long term navigationmaintenance (waterfront property tax increases, navigationmaintenance districts, cost sharing, TIF zones etc.)
Require future new projects to demonstrate a positive B/Cratio
Investigate long term sites for dredge material disposal
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State and Federal Environmental Regulations
Affect any work in wetlands and waters of the US
Require public interest review for most types of work inaquatic systems
Constrain drainage modification solutions
Must be factored into any response to the issues discussed
City should consider partnering with agencies on long termstrategies for dealing with sea level rise, flooding,stormwater management and shoreline stabilization.
Federal funding may be available for some improvements
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