19950786 Ver 1_Meeting Minutes_19940120

BRUNSWICK COUNTY
REPLACEMENT OF BRIDGE N0. 198 ON SR 1172
OVER ATLANTIC INTRACOASTAL WATERWAY
AT SUNSET BEACH, NORTH CAROLINA
STATE PROJECT N0.8.2230101
FEDERAL AID PROJECT N0. BRS-1813(1)
T1P N0. B-682
INTERAGENCY REVIEW MEETING
JANUARY 20, 1994
NORTH CAROLINA DEPARTMENT OF TRANSPORTATION

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REPLACEMENT OF BRIDGE N0.198
OVER THE INTRACOASTAL WATERWAY
AT SUNSET BEACH, BRUNSWICK COUNTY, NC
TIP N0. B-682
STATE PROJECT: 8.2230101
FEDERAL AID PROJECT: BRS-1813(1)

STUDY ALTERNATIVES
The project study will involve the identification and evaluation of a variety of build, as well as no-build
alternatives. No-build alternatives include: 1) routine maintenance of the existing structure; and 2)
complete rehabilitation of the existing structure.
At present, eleven build alternatives are being considered. These include low and mid-level bascule
(draw bridge) and high-level fixed span designs. Existing location (center corridor) and relocation
alternatives, both to the east and to the west, have been developed (see figures on following pages
of this Newsletter). Additionally, ferry and tunnel alternatives are being investigated during the
preliminary phase of the project study. The preliminary build alternatives are depicted below.
LEGEND
~ AT-GRADE INTERSECTION
GRADE SEPARATED INTERSECTION
~ CUL-DE-SAC
Q 500 1, 000
Approximate Scale
(feet)
ALTERNATIVE W1
High Level (65') Fixed Span
West Corridor
~ ~ ~c~~ v~ ~~ ~~~

0 500 1, 000
Approximate Scale
(feet)
ALTERNATIVE C1
High Level (65') Fixed Span
Center Corridor
0 500 1, 000
Approximate Scale
(feet)
ALTERNATIVE E1
High Level (65') Fixed Span
East Corridor

0 500 1, 000
Approximate Scale
(feet)
ALTERNATIVES W2,C4,E2
Mid-Level (30') Bascules
West, Center and East Corridors
0 500 1, 000
Approximate Scale
(feet)
ALTERNATIVES W3,C2,E3
Low Level (15') Bascules
Est, Center and East Corridors

SUNSET BEACH BRIDGE REPLACEMENT PROJECT
COMPARATIVE ANALYSIS OF ALTERNATIVES

EVALUATION CRITERIA C1 C2 C4 Wi;.; WZ W3 Et E2' E3 Fi Ti
CONSTRUCTION PARAMETERS
Hei ht of Structure clearance above MHT 65' 15' 30' 65' 30' 15' 65' 30' 15' - -
Len th - Roadwa Mainline
Len th -Relocated Roads
Len th - Brid e/Tunnel
Len th - Tem ora Detour
Ri ht-of-Wa Ac uisition (acres) 880'
1,600'
2,350'
1,300'
5.88 815'
-
750'
500'
1.29 745'
260'
1,050'
1,100'
2.05 1,395'
720'
2,380'
800'
3.24 640'
780'
1,140'
400'
2.33 720'
700'
1,050'
400'
1.63 1,195'
670'
2,700'
900'
5.31 775'
-
1,500'
500'
3.80 850'
-
1,430'
400'
3.80 1,240'
-
-
800'
4.53 2,460
900'
2,360'
1,400'
11.78
TRAFFIC AND OPERATIONS
Service to Throu h Traffic H M M L L L L M M M L
Effic ienc to Serve Traffic H L M H M L M M L L H
Vessel Safe Awaitin com leti n of Ves el Im ac Anal si
Pedestrian/Bic clist Access & Safet L H M L M H L M H M n/a
COMMUNITY PLANS ~ CHARACTERISTICS
Com tibilit with Current Plans
Com atabil' with Electrical Utilities
Use of Existin Public Corridor(s)
Aesthetics M
M
M
L H
H
H
H H
H
H
M M
H
M
L M
H
M
M M
H
M
H M
M
L
L M
L
L
M M
L
L
H L
M
L
H M
M
L
M
Effects on Nei hborhoods M M M L M M M M M H M
NATURAL RESOURCES
Effects on Water Dualit H M M H M M H M M M L
Im ct to Man Dominated Communities
Linearfeet - a roach *
Linearfeet -structure ** 2,310
750 415
60 555
120 1640
280 600
25 570
25 1,035
350 225
- 130
105 90
- 2415
10
Im ct to Salt Shrub
Linearfeet - a roach * - - _ _ _ _ _ _ _ _ _
Linearfeet -structure ** - - - - - - - 200 200 - -
Im act to Coastal Frin a Ever reen Forest
Linearfeet - a roach *
Linearfeet -structure **
Im ct to Salt Marsh 900 - 150 300 520 550 250 150 300 450 170
- - - 550 55 75 200 100 50 - 660
Linearfeet - a roach *
Linearfeet -structure ** -
990 400
140 300
390 -
300 300
60 300
- 60
700 400
400 400
325 550
- 400
130
Im ct to Non.-Riverine Wet Hardwood Forest
Linearfeet - a roach * 100 - - - - _ _ _ _ _ _
Linearfeet -structure ** - _ _ _ _ _ _ _ _ _ _
Im act to O en Water
Linearfeet - a roach *
Linearfeet - structi~re ** 100
610 -
550 -
540 175
1,250 -
1,000 -
950 520
1,450 -
800 20
750 150
- 375
1,560
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SUNSET BEACH BRIDGE REPLACEMENT PROJECT
COMPARATIVE ANALYSIS OF ALTERNATIVES

EVALUATLON CRITERIA Ci C2 C4 W1 ' ,W2 '_1rV3 E1 E2 '' E3 > Fi T1
NATURAL RESOURCES coni'd
Potential Hazardous Materials Sites
Effect on Protected S ecies 2
H 2
H 2
H _
H _
H _
H _
H _
H _
H _
H 1
H
DISPLACEMENTS
Business Relocations 3 3 3 - - - _ _ _ _ 1
Residential Relocations 3 - - - - - 1 1 1 1 3

ENGINEERING FEASIBILITY M L L M L L M L L H L

TOTAL ESTIMATED COST (millions) $14.34 $19.35 $21.03 $16.55 $21.86 $21.79 $16.58 $23.65 $22.98 $124.92 $44.72

L -LOW (POOR) M -MODERATE H -HIGH (GOOD)
* Approach includes all proposed roadwaywork, including relocations.
** Estimates are approximate and do not denote distinctions in shading or definitive piling impacts.

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SUNSET BEACH BRIDGE REPLACEMENT PROJECT
ALTERNATIVE SELECTION PROCESS
RATING CRITERIA
Criteria
A. Construction Parameters
1. Height of Structure
2. Project Length -Mainline Roadway
3. Project Length -Relocated Roadways
4. Structure (Bridge/Tunnel) Length
5. Temporary Detour Length
6. Right-of--Way Acquisition
B. Traffic and Operations
1. Service to Through Traffic
2. Efficiency of Structure to Serve Traffic
3. Vessel Safety
4. Pedestrian & Bicyclist Access/Safety
C. Community Plans and Characteristics
1. Compatibility with Current Plans
2. Disruption of Public Utilities
3. Use of Existing Public Corridor(s)
4. Aesthetics
5. Neighborhood/Residential Effects
D. Natural Resources
1. Effects on Water Quality
2. Impact to Man Dominated Communities
3. Impact to Salt Shrub
4. Impact to Coastal Fringe Evergreen Forest
5. Impact to Salt Marsh
6. Impact to Nonriverine Wet Hardwood Forest
7. Impact to Open Water
8. Effect on Hazardous Materials Sites
9. Effect on Known Protected Species Sites
E. Relocations
1. Business Relocations
2. Residential Relocations
Indicators
Clearance above mean high tide (MHT)
Construction length along mainline
Construction length along other roads
Length of bridge/tunnel
Length of temporary detours
Acres of R/W required
Traffic projections
Continuity of traffic movements
Impact potential
Steepness (grade), accessibility and safety of structure
Current Thoroughfare and Land Use Plans
Potential to minimize effect to electrical utility
Length along existing right-of--way
Height and "thickness" of structure
Length through/adjacent to neighborhoods
Potential to minimize impacts to water quality
Linear feet of roadway and bridge
Linear feet of roadway and bridge
Linear feet of roadway and bridge
Linear feet of roadway and bridge
Linear feet of roadway and bridge
Linear feet of roadway and bridge
Number of sites
Potential to minimize impacts to protected species
Number within project limits
Number within project limits
F. Engineering Feasibility
G. Estimated Cost
Design complexities
Total project cost (includes construction, utilities and
right-of--way costs)