20221208 Ver 1_CAMA Narrative 20220929_20221018

Narrative
Residences at Bask
Revised: 9/29/2022
Property Owner & Permitee: Residence at 9th, LLC
William A. Brown, Manager
125 Horton Drive
Morehead City, NC 28557
[phone]
Engineer: The Cullipher Group, PA
Ronald D. Cullipher, PE
151-A Hwy 24
Morehead City, NC 28557
[phone]
Residences at Bask is proposed as a townhome development with the construction of twenty-five units. The
property is 2.43 acres and located at 901 and 909 Shepard Street in Morehead City. Each unit proposes a private
driveway that provide two parking spaces per unit. The pre-existing built upon area as shown in the attached aerials
from multiple years confirms that a majority of the two lots to be permitted were previously developed with
impervious coverage close to 100%. Over the years, Owners of 909 Shepard Street no longer maintained the gravel
lot allowing a grass cover over most of the lot, however no gravel has been removed from the lot. Glenn Corbett, PLS
of The Cullipher Group, PA recently surveyed the existing impervious areas and calculated approximately 80,971
square feet of existing built upon area. Other existing features on the site include a rail dock and dilapidated docking
facility to be removed and bulkhead to be upgraded for the proposed development. It was also determined that no
wetlands exist on site.
This project is located within an Urban Waterfront designation allowing the exemption of the Vegetative
Buffer Requirements per Session Law 2008-211 Section 2(e). This designation was confirmed by the Planning Board
Land Use Plan Consistency & Reasonableness Statement No. 2022-004 for Case #SUB22-0001 Item 1) xi. included in
the submittal. Both lots are elevated in the center and drain in all directions eventually into the Harbor Channel,
Class SC, Index Number 20-36-14. Even though the existing developments provided sheet flow there was little to no
treatment of runoff over grassed areas before ultimately discharging into Harbor Channel.
As shown on the attached drainage area map, DA1, DA2, DA3 and DA5 are each near 100% impervious and
provide minimal contact with any vegetation prior to entering the municipal drainage system. DA4 has the largest
area of vegetated area but smallest amount of impervious. DA4 has approximately 4,900 square feet of existing
impervious with less than half sheet flowing through the vegetated area before leaving the site.
The redevelopment plan proposes approximately 13% less impervious and provides sheet flow through
vegetated areas between units and around the perimeter of the property prior to leaving the property to provide
better stormwater treatment by naturally removing pollutants, promoting infiltration, reducing the amount of runoff
and pollutants leaving the site. Roof drainage discharges to the grassed landscaped areas between units and away
from the interior street system. At this time, future allocation of the remaining impervious is included in the design
for documentation in the permit.

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PM636-105 Residences at Bask
NC Coastal Management
Upland development includes twenty-five (25) townhouses each with private concrete driveways for two
parking spaces, a common drive to access the common amenities and interior units. Each of the waterfront lots
propose a six -foot -wide upland access to the proposed 8' wide dock. The top of the existing bulkhead averages an
elevation of 3.5 and a 2.5' taller bulkhead is proposed waterward of the existing, extending the length of shoreline
and then filled bringing the site two foot above the effective flood zone AE 8. The manmade canal located along the
southern portion of the project taken at the narrowest point between existing bulkheads measures approximately
160'. The proposed bulkhead decreases this distance by two feet at this same location. The tie back work area is
approximately 10-12' setback measured from the proposed bulkhead. The federal channel setback measured to the
proposed bulkhead varies between 43'- 91' along the property. An 8' wide dock is proposed parallel the new
bulkhead alignment and includes six 4' wide finger piers and one 4' wide dock, with two additional 4' finger piers to
accommodate 18 boat slips, all but one with a boatlift. The Town of Morehead City will provide public water and
sewer via extensions and services into the project. Upland disturbance is approximately 2.65 acres. With 580 LF of
shoreline equating to 15,660 sf of allowable public trust area the total affected area for the proposed is 14,669 sf.
The following table provides existing and proposed conditions within the 75' AEC:
Area within 75' AEC
33,165 SF
Existing BUA within 75' AEC
16,899 SF
Allowable 30% BUA within 75' AEC
9,949 SF
Proposed BUA within 75' AEC
17,180 SF
Redevelopment BUA over Existing BUA
9,723 SF
Required BUA to treat for Max 30% Coverage
7,231 SF
Required 1.5" Treatment Volume
904 CF
Treatment Volume R-Tank LD Module
4.22 CF/MODULE
Required Number of Modules
215 MODULES
Provided Number of Modules
216 MODULES
Provided Treatment Volume
911 CF
The innovative design for impervious surfaces exceeding 30% of the 75' AEC designed by Ronald D. Cullipher,
PE NC-13343, of The Cullipher Group, PA, meets licensing requirements for the type of system proposed.

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PM636-105 Residences at Bask
CAMA Statements
• The 401 Pre -filing Meeting Request was confirmed received 4/27/2022 (previously attached).
• The project proponent hereby certifies that all information contained herein is true, accurate, and complete
to the best of my knowledge and belief.
• The project proponent hereby requests that the certifying authority review and take action on this CWA 401
certification request within the applicable reasonable period of time.
Stormwater Table
Basin Information
Existing BUA
(On -Site)
Proposed BUA
(On -Site)
Receiving Stream Name
Harbor Channel
Harbor Channel
Stream Class
SC
SC
Stream Index Number
20-36-14
20-36-14
Total Drainage Area (sf)
105,961.71
105,961.71
On -site Drainage Area (sf)
105,961.71
105,961.71
Off -site Drainage Area (sf)
Proposed Impervious Area (sf)
Existing BUA (sf)
80,971
Impervious Area (total)
76.42%
Impervious Surface Area
Existing BUA
(On -Site)
Proposed BUA
(On -Site)
Lots*see Table below (including
driveways and sidewalks) (sf)
47,350
Streets (sf)
18,920
Sidewalks (sf)
Community Amenity (sf)
10,000
Future BUA (sf)
4,700
Existing BUA (sf)
80,971
Total (sf):
80,971
80,970

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PM636-105 Residences at Bask
Lot Built Upon Area
Lot Number
NC CAMA
BUA (sf)
NCDEQ
BUA (sf)
Lot Number
NC CAMA
BUA (sf)
NCDEQ
BUA (sf)
1
1900
1900
14
1646
2250
2
1700
1700
15
1680
1900
3
1700
1700
16
1680
1900
4
1700
1700
17
1680
2200
5
1700
1700
18
1680
2200
6
1700
1700
19
1680
2200
7
1700
1700
20
1680
2200
8
1700
1700
21
1680
2200
9
1900
1900
22
1750
1750
10
1750
1750
23
1750
1750
11
1750
1750
24
1750
1750
12
1330
1700
25
1750
1750
13
1766
2400
* In the case of a lot within CAMA's regulated 75' AEC, where the Division of Coastal Management calculates a
different maximum allowable built -upon area for that lot than is shown herein, the governing maximum built -upon
area for that lot shall be the most restrictive of the two. Built -upon area more than NC CAMA BUA shown in the table
above requires additional engineering and permitting.
Erosion and Sedimentation Control Measures
The following measures are proposed for the site. If it becomes evident that additional erosion and
sedimentation control measures are needed, they shall be installed immediately. It is intended that all grading and
excavation activities within a certain area will be protected as soon as that activity is complete.
1. Temporary Gravel Construction Entrance — Stone construction entrance will be used to reduce transport of
sediment off site.
2. Sediment Fence — Sediment fence will be utilized as necessary in locations as shown on plans or as deemed
necessary by the engineer to ensure that off -site sedimentation is controlled.
3. Seeding — All disturbed areas will be seeded within 7 days following construction in accordance with the
seeding schedule shown on the plans.
Erosion Control Specifications
1. Temporary Gravel Construction Entrance:
a. Clear the area of vegetation and grade for positive drainage.
b. Install geotextile fabric and place stone to the required dimensions.
c. Use 2" to 3" stones, free of fines.
2. Sediment Fence
a. Use a synthetic filter fabric of at least 95% by weight of polyolefins or polyester, which is
certified by the manufacturer or supplier as conforming to the requirements in ASTM D 6461.
b. Posts for sediment fences should be 1.25 lb/linear foot minimum steel with a minimum length
of 5 feet and projections to facilitate fastening the fabric.

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PM636-105 Residences at Bask
c. For reinforcement of standard strength filter fabric, use wire fence with a minimum 14 gauge
and a maximum mesh spacing of 6 inches.
Specifications for Sediment Fence Fabric:
Temporary Silt Fence Material Property Requirements*
Test Material
Units
Supported
Silt Fence
Un-Supported
Silt Fence
Type of Value
Grab Strength
ASTM D 4632
N(Ibs)
Machine Direction
400
550
MARV
(90)
(90)
X-Machine Direction
400
450
MARV
(90)
(90)
Permittivity
ASTM D 4491
Sec-1
0.05
0.05
MARV
Opening Size
ASTM D 4751
mm
0.60
0.60
Max.ARV
(US Sieve #)
(30)
(30)
Ultraviolent Stability
ASTM D 4355
% Retained
Strength
70% After
500h of
Exposure
70% After 500h
of Exposure
Typical
*From Erosion and Sedimentation Control Manual Table 6.62b
Maintenance Plan
1. All erosion and sediment control measures shall be checked for stability and effective operations following
every runoff producing rainfall event or at least once per week. Repairs required shall be completed
immediately to the dimension and functions indicated on the plans.
2. Sediment shall be removed from behind the sediment fencing when it becomes 0.5 feet deep at the fence.
The fence shall be replaced or repaired as necessary to maintain a barrier.
3. All seeded areas shall be fertilized, seeded and mulched within 7 days of disturbance. Disturbed areas shall
be fertilized, reseeded and mulched as necessary according to the Contract documents to establish and
maintain a dense vegetative cover.
Construction Sequence
1. A minimum of 48 hours prior to land disturbance contact NCDEQ Land Quality Section at [phone] to
schedule a preconstruction conference.
2. Remove and/or relocate existing obstructions.
3. Clear and grub the site and remove any impervious areas not to remain on the site. Existing drainage and
utilities should be excavated, properly disposed, and backfilled with clean sand materials.
4. Extend private water and sewer utilities into the project prior to constructing perimeter walls.
5. Construct walls around perimeter of project, new bulkhead extension and raise existing bulkhead along the
shoreline. Install temporary walls at each stair location until corresponding units are to be constructed.
6. Fill the entire site to elevation 5.5.
7. Construct gravity sewer including sewer services.
8. Install silt fence around the perimeter of the project as shown on the plans.

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PM636-105 Residences at Bask
9. Continue to mass fill the site.
10. Rough grade site.
11. Construct water lines, water services and other utilities.
12. Seed, mulch and install excelsior blanket on all areas of disturbance not to be paved within 7 days of land
disturbance.
13. Begin building construction.
14. Backfill around perimeter walls to design elevation 6.0 and sod to avoid erosion.
15. Perform final grading, seed and mulch or sod all remaining disturbed areas.
16. Remove silt fence, regrade, and stabilize any eroded areas.
Coastal Stormwater Regulations
The North Carolina Division of Environmental Management implemented coastal stormwater regulations in
coastal counties on January 1, 1988, and most recent codified effective January 1, 2017. These regulations are
detailed in 15 NCAC 02H.1019 Coastal Counties. These rules allow for a development to be considered under
various options. This project is submitted for approval consideration under Redevelopment per 15A NCAC
02H.1001(1)(f), G.S. 143-214.7(a1) and Session Law 2008-211 Section 2(e).