20120894 Ver 2_More Info Received_20130124

Hobbs Upchurch Associates
engineering I planning I surveying
January 23, 2013
Ms. Karen Higgins - Supervisor,
Wetlands, Buffers, Stormwater,
Compliance And Permitting Unit
NCDENR — Division of Water Quality
512 N. Salisbury Street Floor 9,
Raleigh, North Carolina 27601
RE: DWQ Project # 12 -0894 v2
Buckhorn-Mebane EDD Phase 2
Water and Sewer Improvements
Orange County, NC
HUA Project No.: OC1001.300
Ms. Higgins:
Regarding the above referenced project, we have received your review comment dated January 11, 2013.
A copy of the comment received and our response is provided below.
1. Explain how impacts within the easement/corridor to Zone I are designated as "temporary".
If these areas will be revegetated, provide planting plans.
The permanent impact to Zone 1 will be the result of the permanent maintenance access corridor.
Typically, this corridor will be 15' wide over the proposed utility. Areas that are within the
construction corridor, but outside the permanent maintenance corridor were designated as
temporary impacts. Clearing and excavation will be performed in these areas as needed to install
the proposed utilities. After construction is complete the riparian buffer will be restored by
planting various shrubs. A detail providing a planting plan for typical riparian buffer restoration
at stream crossings has been added to the plans and is enclosed for your review.
Please do not hesitate to contact me with any questions or if you need additional information
Sincerely,
HOBBS, UPCHURCH & ASSOCIATES, P.A.
Mark Lacy, P.E.
Enclosures:
JAN 2 J. 2013
T 910.692 5616 1 F 910 692 7342 1 300 SW Broad Street I Southern Pines, NC 28387 1 WWW HOBBSUPCHURCH COM
SUPERIOR PERFORMANCE THROUGH INNOVATIVE DESIGN

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MAX. I 1 DEPTH
NON -WOVEN
GEOSYNTHETIC 0'
FILTER FABRIC F--i RIPRAP SIZE
AND THICKNESS VARIES
SEE CHART BELOW
NOTE CLASS A RIPRAP SHALL BE 9" THICK.
CLASS B RIPRAP SHALL BE 23' THICK.
CLASS I RIPRAP SHALL BE 24" THICK
CLASS II RIPRAP SHALL BE 27" THICK
RIPRAP SWALE
MAINTENANCE
1. INSPECT ROLLED EROSION CONTROL
PRODUCTS AT LEAST WEEKLY AND AFTER
EACH SIGNIFICANT (1/2 INCH OR
GREATER) RAIN FALL EVENT, REPAIR
IMMEDIATELY.
2. GOOD CONTACT WITH THE GROUND
MUST BE MAINTAINED. AND EROSION
CONTROL MUST NOT OCCUR BENEATH
THE RECP.
3. ANY AREAS OF THE RECP THAT ARE
DAMAGED OR NOT IN CLOSE CONTACT
WITH THE GROUND SHALL BE REPAIRED
AND STAPLED
4. IF EROSION OCCURS DUE TO POORLY
CONTROLLED DRAINAGE, THE PROBLEM
SHALL BE FIXED AND THE ERODED AREA
PROTECTED.
5 MONITOR AND REPAIR THE RECP AS
NECESSARY UNTIL GROUND COVER IS
ESTABLISHED.
A.) BURY THE TOP OF THE JUTE STRIPS IN A
TRENCH 6' OR MORE IN DEPTH.
B) TAMP THE TRENCH FULL OF SOIL SECURE WITH
STAPLES EVERY 12' ACROSS THE TOP AND
EVERY 3' AROUND THE EDGES AND BOTTOM.
MAX q3
1 LINING
EXCELSIOR MAT 2' DEPTH
OVERLAP AT SEAMS
STAPLES 2' O.0 I o. I
BOTH DIRECTIONS I —i
NOTE.
1 ) PREPARE, SEED,AND INSTALL SOIL EROSION CONTROL
BLANKET ON DISTURBED AREA OF DITCH.
2) EXCELSIOR MATTING WILL BE NAG S1508N OR AN
APPROVED EQUAL MATTING.
EXCELSIOR MAT SWALE
6" MIN FILL FABRIC W/ TOPSOIL
HAND SEED do LIULCH
W
4" �4. 41�
N
0. AS SPECIFIED
NOTE:
OVERLAP SHALL BE 2" MIN.
AND BE LAID WITH OVERLAP
OCCURING ON DOWNSLOPE.
N A -MAT' SWA F
C)
E�F�
BURY UPPER END OF LOWER
'A' 'B'.
SIDE BY SIDE. THE ADJACENT EDGES
STRIP AS IN AND OVERLAP
AMERICAN STRAWBERRY BUSH
END OF TOP STRIP 18" AND
•
STAPLE EVERY 12" JUST
BELOW THE ANCHOR SLOT�3�
• TYPICAL STAPLES
D) EROSION STOP
#8 GAUGE WIRE
FOLD OF JUTE BURIED
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IN SLIT TRENCH AND
DOWN THE CENTER EVERY 3'. DO NOT
TAMPED DOUBLE ROW
OF STAPLES
AMBUCUS CANADENSIS
COMMON ELDERBERRY
PRESS ENDS OF JUTE 4" INTO THE SOIL
AROUND STRUCTURES AND STAPLE SECURELY
Detod Sheet! dwp
MAINTENANCE S -H D I F
1) INSPECT STRUCTURE AT LEAST ONCE A
WEEK AND AFTER EACH RAINFALL MAKE ANY
REQUIRED REPAIRS IMMEDIATELY.
2.) REMOVE SEDIMENT AND RESTORE THE
SEDIMENT STORAGE AREA TO ITS ORIGINAL
DIMENSIONS WHEN THE SEDIMENT HAS
ACCUMULATED TO ONE -HALF OF THE DESIGN
DEPTH OF THE STRUCTURE.
3 ) ANY RIPRAP DISPLACED FROM THE ROCK
SILT CHECK MUST BE REPLACED
IMMEDIATELY
BASE OF DITCH FOR -V-
TOP OF DITCH SLOPE
i
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�N
BASE OF DITCH FOR FLAT
BOTTOM DITCH
TOP OF DITCH SLOPE
REVISIONS
PLAN
TOP OF DITCH SLOPE SILT CHECK
I— SEE DETAIL
III_ IIIIII- IIIIII— IIIil�llll�lllll�l III= IIIIII�iIII- IIIIII IIIIIII = IIIIII =VIII
FLOW BASE OF DITCH
BASE OF DITCH FLOW LINE 10' FLOW LINE
IIIIIII = IIIIII= IIIII-111111 =1111 I IIIIII =VIII= VIII= IIIIII
N
VIII- _ III Will IIIIIII
ELEVATION
RIPARIAN BUFFER RESTORATION NOTES,
1. ALL DISTURBED AREA WITHIN ZONE 1 OF THE NEUSE RIVER BASIN
RIPARIAN BUFFER SHALL BE RE VEGETATED AFTER CONSTRUCTION IS
COMPLETE. TEMPORARY VEGETATIVE COVER SHALL BE PROVIDED
ACCORDING TO THE SCHEDULES GIVEN BELOW. SOD - FORMING GRASSES
SUCH AS FESCUE OR KENTUCKY BLUEGRASS WILL NOT BE ALLOWED
WITHIN RIPARIAN BUFFER RESTORATION AREAS.
SEED AND DATES BAM
RYE GRAIN (JAN i - MAY 1 AND 120 d /ACRE
AUG 15 - JAN 1)
BROWN TOP OR PEARL MILLETT (MAY 1 - AUG 15) 40 # /ACRE
MULCH - STRAW k TACK 4,000 # /ACRE
2. THE CONTRACTOR SHOULD AVOID GRUBBING AREAS OUTSIDE OF THE
PERMANENT MAINTENANCE CORRIDOR. WHERE GRUBBING CANNOT BE
AVOIDED, OR IN EXCAVATED AREAS, THE PERMANENT VEGETATIVE RIPARIAN BUFFER SHALL BE RESTORED BY PLANTING A VARIETY OF SHRUBS IN A
RANDOM PATTERN. SHRUBS TO BE PLANTED ARE SHOWN IN THE UST
BELOW. AT LEAST ONE OF EACH SPECIES SHALL BE PLANTED IN EACH
BUFFER RESTORATION AREA. SEPARATION DISTANCE BETWEEN PLANTINGS
SHALL BE A MAXIMUM OF 6'. SHRUB PLANTINGS SHALL BE BARE ROOT
SEEDLINGS WITH TREE SHELTERS. A ONE -TIME FERTILIZER APPLICATION
WILL BE ALLOWED TO AID THE ESTABLISHMENT OF NEW PLANTINGS
WHERE 2 STRIPS OF NET ARE LAID
SCIENTIFIC NAME
COMMON NAMES
SIDE BY SIDE. THE ADJACENT EDGES
EUONYMUS AMERICANUS
AMERICAN STRAWBERRY BUSH
SHOULD BE OVERLAPPED 3" AND
ARONIA ARBUTIFOLIA
RED CHOKE BERRY
STAPLED TOGETHER EACH STRIP OF
NETTING SHOULD ALSO BE STAPLED
UNDERA BENZOIN VAR. SENZOIN
SMOOTH NORTHERN SPICEBUSHS
DOWN THE CENTER EVERY 3'. DO NOT
STRETCH WHEN APPLYING STAPLES
AMBUCUS CANADENSIS
COMMON ELDERBERRY
MAINTENANCE
INSPECT ALL MULCHES PERIODICALLY, AND AFTER RAINSTORMS TO CHECK FOR RILL EROSION
DISLOCATION, OR FAILURE WHERE EROSION IS OBSERVED, APPLY ADDITIONAL MULCH. IF
WASHOUT OCCURS, REPAIR THE SLOPE GRADE, RESEED, AND REINSTALL MULCH CONTINUE
INSPECTIONS UNTIL VEGETATION IS FIRMLY ESTABLISHED.
DETAILS FOR STABILIZATION SWALES
N T.S
ALL DITCHES DISTURBED AS A RESULT OF
CONSTRUCTION INSTALLATION OR EQUIPMENT
TRAFFIC WILL BE RESTORED WITH
INSTALLATIGN OF EXCELSIOR MAT-ING
3. THE FOLLOWING PLANTING PRACTICES SHALL BE FOLLOWED
• ROOT COLLARS SHOULD BE SLIGHTLY BELOW THE SURFACE
• MAIN ROOTS SHOULD BE STRAIGHT OR SPREAD OUT
• SOIL SHOULD BE COMPACTED AROUND THE ROOTS UNTIL IT IS
FIRM
• THE PLANTING SHOULD BE UPRIGHT AND NEARLY EVEN WITH
GROUND LEVEL
4 THE CONTRACTOR SHALL PROVIDE AND INSTALL A 6 -INCH LAYER OF
AGED HARDWOOD MULCH TO THE RESTORATION AREA AFTER PLANTING IS
COMPLETE.
SILT BASIN DETAIL
N T.S.
JAN 242013
NR .
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VARIES
15'
PERMANENT
MAINTENANCE
1 ACCESS
WIDTH j
VAR IES I ; RIPARIAN BUFFER
LIMITS OF RESTORATION AREA
DISTURBANCE 1 (TYPICAL)
1 ZONE I NEUSE /
n RIPARIAN BUFFER
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(IYPIC1L)
LIMITS OF
RIPARIAN BUFFER 1 I I 1
�I DISTURBANCE
RESTORATION AREA 1 PROPOSED
(TYPICAL) 1 I I 1 UTILITY
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