HomeMy Public PortalAbout20151208TAC Meeting .pdfCARRYING CAPACITY
TAC Meeting #1
December 8, 2015
City of Tybee Island
MEETING AGENDA
Scope of Project
Review of Wave Ecology Report
Data Gathering & Analysis
SCOPE OF WORK
Technical Advisory Committee
Community Resources Inventory & Assessment
Analysis of Community Resources Limitations
Recommendations & Implementation Plan
Coordination with Comprehensive Plan Process
Scheduled to be completed in October 2016
WAVE ECOLOGY AND HIGHWAY 80 CHALLENGE
STUDY 2011
Study Authors: Chatham County in partnership with the
City of Tybee Island & CORE MPO
Purpose: Develop strategies for addressing public safety
concerns along the Highway 80 corridor
Approach: Data collection and analysis through urban
ecosystem planning with the input of key community
leaders.
STEERING COMMITTEE
Russ Abolt Chatham County County Manager
Jimmy Brown City of Tybee Island Tybee Emergency Management Coordinator
Robert Bryson Tybee Island Police Department Police Chief
Jason Buelterman City of Tybee Island Mayor
Leon Davenport Chatham County County Engineer
Wanda Doyle City of Tybee Island Council Member
Robert W. Drewry Chatham County Director Public Works & Park Services
Pat Farrell Chatham County Board of Commissioners County Commissioner
Rochelle Ferguson Low Country Regional Transportation Authority Executive Director
Anthony Gallo Savannah –Chatham Metro Police Department Sergeant of Police
William Garbett City of Tybee Island Council Member
Bill Greenwood Dafuskie Island Council Council Member
Jonathan Hagan Tybee Island Police Department Captain of Police
Ben Herron Savannah –Chatham Metro Police Department Captain of Police
Chris Hutton Low Country Regional Transportation Authority Board Member
Ethan Imhoff City of Tybee Island Director of Planning
Michael Izzo Savannah –Chatham Metro Police Department Traffic Division
Bethany Jewell Chatham County Personal Contract –Wave Ecology Study
William Lovett Savannah –Chatham Metro Police Department Chief of Police
Chantel Morton City of Tybee Island Better Hometown Coordinator
Chad Reese Chatham Area Transit Executive Director
C.L. Sasser Tybee Island Fire Department Fire Chief
Brad Saxon Georgia Dept. of Transportation District 5
Diane Schleicher City of Tybee Island City Manager
Clayton Scott Chatham Emergency Management Agency Director
Teresa Scott Georgia Dept. of Transportation District 5
Patrick Shay Chatham County Board of Commissioners County Commissioner
Tom Thomson Coastal Region MPO & Chatham –Savannah MPC Executive Director
Wykoda Wang Coastal Region MPO Transportation Planner
Joe Wilson City of Tybee Island Director of Public Works
Paul Wolff City of Tybee Island Council Member
KEY CONCEPTS
Urban Ecology -school of thought seeks to understand the natural systems of
urban/developed areas and the threats that face them
Wave Ecology –Subset of Urban Ecology that acknowledges the stress fluctuating
variables can place on the capacity of a community such as population changes
(peak tourism) and the natural climate (tidal changes, sea level rise ).
Carrying Capacity -The maximum population of species that can be sustained in
their given environment.
HUMAN APPLICATION OF CARRYING CAPACITY
I = P x A x T
I = Environmental Impact
P = Population
A = Affluence
T = Technology
Human carrying capacity is not strictly related to population size, but to many levels of consumption,
which are in turn impacted by technology and the economy.
Local governments have the opportunity to opportunity to impact these variables through regulatory
and policy choices related to land use, infrastructure improvements, growth management, and the local
economy.
DATA ASSESSMENT
Population
2000 Census data –Resident Population
Tybee Tourism Count –Overnight Tourist
Population
Traffic Counts –Day Trippers
Affluence
2002 Economic Census Services &
Commodities –Employment Numbers
2000 Census –Per Capita income
2000 Census –Home affordability
Mortgage payment > 35% of income
DATA ASSESSMENT
Technology
Water & Sewer
Housing
Roads
Bikeways
Marinas
Inter-Island Access
Solid Waste
Electricity
Technology Data
2000 Census
Traffic Counts
Tidal data
Parking study data
ISSUES IDENTIFIED
Traffic Congestion/Lack of Access/Mobility Issues During Special Events and Peak
Tourism
Incident/Accident (Stalled Vehicles on Highway 80) / Narrow Bridges Lack of
Shoulders / Public Safety
Lack of Parking Space During Special Events
Emergency Situation and Evacuation
SHORT TERM RECOMMENDATIONS
1.Install road signage to address special features related to safety concerns.
2.Establish a bus or shuttle service during special events and inter-island options during
peak tourism periods.
3.Establish and maintain an ongoing bus/shuttle service through the Coastal Regional
Commission.
4.Utilize signal timing and Intelligent Transportation Systems (ITS) during special
events.
5.Utilize social media to disseminate information to the public.
DATA GATHERING & ANALYSIS
Water Withdrawal
Wastewater Discharge
Traffic Counts
Short Term Rental Units
Zoning
WATER WITHDRAWAL
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
Ap
r
-
1
0
Ma
y
-
1
0
Ju
n
-
1
0
Ju
l
-
1
0
Au
g
-
1
0
Se
p
-
1
0
Oc
t
-
1
0
No
v
-
1
0
De
c
-
1
0
Ja
n
-
1
1
Fe
b
-
1
1
Ma
r
-
1
1
Ap
r
-
1
1
Ma
y
-
1
1
Ju
n
-
1
1
Ju
l
-
1
1
Au
g
-
1
1
Se
p
-
1
1
Oc
t
-
1
1
No
v
-
1
1
De
c
-
1
1
Ja
n
-
1
2
Fe
b
-
1
2
Ma
r
-
1
2
Ap
r
-
1
2
Ma
y
-
1
2
Ju
n
-
1
2
Ju
l
-
1
2
Au
g
-
1
2
Se
p
-
1
2
Oc
t
-
1
2
No
v
-
1
2
De
c
-
1
2
Ja
n
-
1
3
Fe
b
-
1
3
Ma
r
-
1
3
Ap
r
-
1
3
Ma
y
-
1
3
Ju
n
-
1
3
Ju
l
-
1
3
Au
g
-
1
3
Se
p
-
1
3
Oc
t
-
1
3
No
v
-
1
3
De
c
-
1
3
Ja
n
-
1
4
Fe
b
-
1
4
Ma
r
-
1
4
Ap
r
-
1
4
Ma
y
-
1
4
Ju
n
-
1
4
Ju
l
-
1
4
Au
g
-
1
4
Se
p
-
1
4
Oc
t
-
1
4
No
v
-
1
4
De
c
-
1
4
Daily Average and Maximum Water Withdrawal per Month
Daily Average Daily Max Daily Ave. Permit Limit
WATER WITHDRAWAL
0.74
0.76
0.78
0.8
0.82
0.84
0.86
2010 2011 2012 2013 2014
Annual Daily Average
Annual Daily Average
Linear (Annual Daily Average)
WATER WITHDRAWAL –FUTURE PERMIT LIMITS
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
2010 2011 2012 2013 2014
Annual Daily Average and Permit Limitations
Annual Daily Average 2015 Permit Limit 2025 Permit Limit
WASTEWATER DISCHARGE
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Oc
t
-
1
2
No
v
-
1
2
De
c
-
1
2
Ja
n
-
1
3
Fe
b
-
1
3
Ma
r
-
1
3
Ap
r
-
1
3
Ma
y
-
1
3
Ju
n
-
1
3
Ju
l
-
1
3
Au
g
-
1
3
Se
p
-
1
3
Oc
t
-
1
3
No
v
-
1
3
De
c
-
1
3
Ja
n
-
1
4
Fe
b
-
1
4
Ma
r
-
1
4
Ap
r
-
1
4
Ma
y
-
1
4
Ju
n
-
1
4
Ju
l
-
1
4
Au
g
-
1
4
Se
p
-
1
4
Oc
t
-
1
4
No
v
-
1
4
De
c
-
1
4
Ja
n
-
1
5
Fe
b
-
1
5
Ma
r
-
1
5
Ap
r
-
1
5
Ma
y
-
1
5
Ju
n
-
1
5
Ju
l
-
1
5
Au
g
-
1
5
Se
p
-
1
5
Wastewater Discharge
Flow Average Flow Ave. Permit Limit Flow Maximum Flow Max Permit Limit
SOLID WASTE –RESIDENTIAL TRENDS
0
50
100
150
200
250
300
350
Solid Waste Disposal & Recycling Trends
Solid Waste Recycling Linear (Solid Waste)Linear (Recycling)
SOLID WASTE –NON -RESIDENTIAL TRENDS
0
20
40
60
80
100
120
140
160
Non Residential Solid Waste Trends
MSW DPW MSW Lovell Recycle DPW Recycle Atlantic
Linear (MSW DPW)Linear (MSW Lovell)Linear (Recycle DPW)Linear (Recycle Atlantic)
POPULATION
POPULATION -CENSUS
Census Comps for Population 2000 2010 Percent
Change
Population 3,392 2,990 -11.85%
HOUSING UNITS –CENSUS
Census Comps for Housing Units 2000 Percent
2000 2010 Percent
2010 Percent Change
Total Housing Units 2,696 --3,366 --24.85%
Occupied Housing Units 1,568 58.20%1,360 40.40%-13.27%
Owner -Occupied 1,078 40.00%918 27.30%-14.84%
Long Term Renter -Occupied 490 18.20%442 13.10%-9.80%
Vacant Housing Units 1,128 41.80%2,006 59.60%77.84%
HOUSING UNITS –TYBEE STUDY 2009
Occupancy Occupancy
Characteristic
Tybee Study 2009 Census 2010
Units Percent Units Percent
Occupied Units Owner Occupied 1,396 44.1%918 27.3%
Long Term Renter 5 0.2%442 13.1%
Vacant Units Short Term Renter 1,472 46.5%1,473 43.8%
For Sale 125 3.9%123 3.7%
Other 169 5.3%410 12.2%
SHORT TERM RENTAL UNITS
Rental Unit Type Number of Units
Average Persons Per
Unit
Peak Rental
Popluation
Hotel 420 2 840
House 1,200 6 7,200
Campground 118 2.58 304
Total 1,738 10.58 8,344
SHORT TERM RENTAL OCCUPANCY
Campground Mermaid Oceanfront Average
Jan 25%25%15%22%
Feb 33%25%35%31%
Mar 73%75%65%71%
Apr 86%90%50%75%
May 78%75%50%68%
Jun 93%99%90%94%
Jul 97%99%98%98%
Aug 55%75%80%70%
Sep 61%50%50%54%
Oct 70%40%38%49%
Nov 45%25%25%32%
Dec 33%25%15%24%
TRAFFIC COUNTS
0
5000
10000
15000
20000
25000
30000
35000
Total Trips
Month Average Weekend Day Average Peak Day
HWY 80 TRAFFIC COUNT MAXIMUM
R -2 ZONING ANALYSIS
55 Total Parcels
R -2 ZONING ANALYSIS
51Developed SFR Parcels
Estimated Population = 128
( 51 x 2.5 )
R -2 ZONING ANALYSIS
Greater than 6,750 Sq Ft = 19
Less than 6,750 Sq Ft = 36
Potential Population = 185
( ( 19x5 ) + ( 36x2.5 ) )45% Increase
R -2 ZONING ANALYSIS
Less than 6,750 Sq Ft = 36 (Pop 90)
Between 6,750-11,250 = 5 (Pop 25)
Between 11,250-13,500 = 14 (Pop 105)
Greater than 13,500 = 1 (Pop 10)
Maximum Population = 230
80% Increase
NEXT STEPS
Additional Data?
Additional Analysis?
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