Dwane Powell (News & Observer; April 1, 2007)
Jeffrey Warren, PhDNC Division of Coastal Management
Setbacks and Static Vegetation Line
proposed scenario
increased setbacks
1979, NO MAINTENANCE
Limited additional development adjacent to large-
scale beach fill
Increased setbacks
Limited additional development under limited conditions behind large-scale beach fill projects that are/will be maintained
SEND TO PUBLIC HEARING TO CONTINUE THE STAKEHOLDER
INPUT PROCESS
DCM Recommendation
14 bedrooms (Dare County)
proposed construction (Atlantic Beach)
1. Setbacks based on size and not use
2. No setback relief for higher erosion rates
3. Increased, graduated setback for larger structures
4. No cantilevering oceanward of setback
5. Criteria for infrastructure setbacks
DCM Setback Recommendations
Single family structures no longer exempt
EXISTING SETBACK CONCEPT
0
50
100
150
200
250
300
350
400
450
2 3 4 5 6 7 8 9 10
EROSION RATE (ft/yr)
SE
TB
AC
K D
ISTA
NC
E (fe
et) huffff
SMALL
LARGE
No setback relief for higher erosion rates
EXISTING SETBACK CONCEPT
0
50
100
150
200
250
300
350
400
450
2 3 4 5 6 7 8 9 10
EROSION RATE (ft/yr)
SE
TB
AC
K D
ISTA
NC
E (fe
et) huffff
SMALL
LARGE
No setback relief for higher erosion rates
DCM recommendatio
n
3060<
5,00
0 sq
ft
65 7075
8085
90
>10
0,00
0 sq
ft
>5,
000
sq f
t
>10
,000
sq
ft
>20
,000
sq
ft
>40
,000
sq
ft
>60
,000
sq
ft
>80
,000
sq
ft
Increased, graduated setbacks for larger structures
Increased, graduated setbacks for larger structurescurrent
scenario
proposed scenario
Increased, graduated setbacks for larger structures
1009 Ft. Fisher Blvd., Kure Beach (photo credit: Spencer Rogers)
CAMA setback line
28 foot cantilever
8 feet oceanward of Town’s streetside
setback
No cantilevering over setback
Gulf Shores, AL (Fauver House Moving)
Bogue Banks, NC (Rudi Rudolph)
RETREAT
BEACH FILL
1. Consider hazard mitigation effect of large-scale, maintained beach fill & current building code
2. Provide incentive for large-scale beach fill
3. Continue current static line concept and its justification
4. Allow limited in-fill development under certain criteria
DCM Static Line Recommendations
Wrightsville Beach (1979)
(post 1965 USACE construction and 1966 and 1970 maintenance)
Photo courtesy of Spencer Rogers
1979 1965
1995, PRE-HURRICANES
Wrightsville Beach (1995)
(post 1981 project, 1991 & 94 maintenance, pre hurricanes)
Photo courtesy of Spencer Rogers
Wrightsville Beach (1996)
(post hurricanes – Bertha, 1996 and Fran, 1996)
Photo courtesy of Spencer Rogers
Wrightsville Beach (1998)
(post hurricane – Bonnie, 1998)
Photo courtesy of Spencer Rogers
Wrightsville Beach (1999)
(post hurricanes – Dennis, 1999 and Floyd, 1999, maintenance in 1998)
Photo courtesy of Spencer Rogers
Photo courtesy of Spencer Rogers
Wrightsville Beach (2001)
(post hurricanes – Dennis, 1999 and Floyd, 1999)
1979, NO MAINTENANCE
1979, NO MAINTENANCE
1.Large scale (USACE or 300 kcy)
2. >30 yr design life
3.Proof of compatible sediment for life of project
4.Resources to pay for life of project
5.Town petitions, CRC decides
Beach Fill criteria
• >5 yr waiting period
• must meet veg line setback
• TFA <2000 sq ft
• Use current erosion rate
• In-line with adjacent structures
• No swimming pools oceanward of static line
Additional development criteria
• Ineligible for single family exemption
• CRC can revoke static line exception if beach fill project fails
*** In lieu of AVL, Oak Island and OIB receive a static line based on June 1998 veg line
Additional development criteria
provision for complex lot geometry
Increased setbacks
Limited additional development under limited conditions behind large-scale beach fill projects that are/will be maintained
SEND TO PUBLIC HEARING TO CONTINUE THE STAKEHOLDER
INPUT PROCESS
DCM Recommendation
Defining large scale44 nav. maint.
projects
1.In line current single family exemption for pre-June 1979 lots
2.General threshold of “easily moveable”
3. Early anecdotal agreement (avg TFA up to mid 1980s)
2,000 sq ft TFA
07H.0309(b)(2) …single family residential structures may be permitted seaward of the applicable setback line…if each of the following conditions are met:
-set back max extent feasible
-at least 60 feet landward of veg line
-not located on or in front of frontal dune
-footprint of structure shall be no more than 1,000 sq ft or 10% of lot size, whichever is greater
single family exemption(lots platted prior to June 1, 1979)
…means the first line of stable natural vegetation… [07H.0305(f)]
This line represents the boundary between the normal dry-sand beach, which is subject to constant flux due to waves, tides, storms and wind, and the more stable upland areas. [07H.0305(f)]
…dune grasses appear the same in terms of species composition and stem density as adjacent non-project dunes… [07H.0305(g)(A)]
…the majority of stems are from continuous rhizomes rather than planted individual root sets… [07H.0305(g)(B)]
Existing vegetation line language
white = existing orange = proposed green = similar
…refers to the first line of stable AND natural vegetation… [draft rule 07H.0305(f)]
This line represents the boundary between the normal dry-sand beach, which is subject to constant flux due to waves, tides, storms and wind, and the more stable upland areas. [draft rule 07H.0305(f)]
This line represents the boundary between the normal dry-sand beach, which is subject to constant flux due to waves, tides, storms and wind, and the more stable upland areas. [draft rule 07H.0305(f)]
Recommended vegetation line language
white = existing orange = proposed green = similar
…DCM or LPO shall determine the location of the stable and natural based on visual observations of plant composition and… density. [draft rule 07H.0305(f)]
…the majority of plant stems are from continuous rhizomes rather than planted individual root sets. [draft rule 07H.0305(f)]
The vegetation may be considered natural when the majority of plants are mature and additional species native to the region have been recruited, providing stem and rhizome densities that are similar to adjacent areas that are naturally occurring. [draft rule 07H.0305(f)]
Recommended vegetation line language
white = existing orange = proposed green = similar