20140984 Ver 1_More Info Received_20150302

February 13, 2015 , S &M E
Division of Water Resources — Water Quality Programs
Asheville Regional Office
2090 U.S. 70 Highway
Swannanoa, NC 28778
Attention: Mr. Tim Fox
N.C. Division of Water Resources
401 Wetlands Unit
512 North Salisbury Street
Raleigh, North Carolina 27604
oL���
Attention: Ms. Karen Higgins, 401 Supervisor
MAR 0 2 2015
DE
Reference: Response to Request for Additional Informati n 4), BUFFER ERMU
PSNC Sweetwater Hills Drive Stream Stabilization
Hendersonville, North Carolina
S &ME Project No. 1356 -13 -004, Phase 19
DWR Project No.: 14 -0984
SAW Action ID No.: 2014 -01723
Dear Mr. Fox and Ms Higgins:
On behalf of our client, PSNC Energy, S &ME, Inc. (S &ME) is hereby providing
additional information pursuant to written approval of a Section 401 Water Quality
Certification (WQC) No. 3883 application, previously submitted on September 8, 2014.
A letter from the North Carolina Division of Water Resources Asheville Regional office,
dated October 14, 2014, requested additional information regarding property owner
approval and a stream restoration design based on natural channel design principles,
outlined in more detail herein.
Since that time, a conference call with Mr. Kevin Barnett and Mr. Andrew Moore (DWR)
and S &ME was held to clarify conditions on site and receive more input regarding
potential 401 requirements. Mr. Barnett and Mr. Moore followed up the conference call
with an October 19, 2014 email where additional considerations and potential
construction design options were presented (attached). On November 12, 2014, S &ME
conducted a site visit with DWR (Mr. Tim Fox and Mr. Zan (George) Price) to clarify the
project plans and address changes since the first submittal. Since the original submittal,
property owner negotiations have limited the current proposed impact area to the existing
right -of -way, reducing workspace, and thereby reducing impacts to Waters of the U.S.
Present at this site visit with DWR were the property owners, representatives of PSNC,
and Ms. Crystal Fox and Mr. Mark Taylor of S &ME. All present provided input with
regard to their respective interests. As a result of these on -site discussions and further
S &ME, INC / 9751 Southern Pine Boulevard / Charlotte, NC 28273 -5560 / p 704 523 4726 f 704 525 3953 / www smeinc corn

Response to Request for Additional Information SBME Protect No 1356 -14004
Sweetwater Hills Drive Stream Stabilization- Hendersonville, N C February 13, 2015
commentary with the property owner, PSNC proposes to install a culvert and armored
outfall which will allow PSNC permanent access, maintain the aesthetics in the property
owner's front lawn, prevent further degradation of the channel, and protect the existing
gas line from exposure and damage (See attached, Drawings and Specifications 1 -6).
S &ME's response to the original October 14, 2014 letter is provided below. Please note,
since the original submittal, proposed impacts have been reduced while incorporating
property owner concerns, PSNC concerns, and DWR concerns.
1) The project proposes to restore a reach of stream located on a property
owned by others not included in the application documentation. Proof will
be needed that the property owners approve work to be completed on their
property, as they will be responsible for the outcome of the project and
compliance with 401 Water Quality Certification conditions.
Since the previous submittal, project constraints have changed such that all work will be
conducted within an existing gas line easement (see the attached Easement Agreement).
Further, the property owner's were present during the field meeting and are in agreement
with proposed activities (see attached email correspondence).
2) The project proposes the use of gabion baskets, which are not considered an
approvable method to utilize for stream restoration and the design creates an
obstacle to aquatic passage, also not approvable. Provide stream restoration
details based upon natural channel design principles.
The original submittal included 91 linear feet (If) of stream bed impacted by stabilization
measures. Since work downstream of the gas line right -of -way is no longer proposed,
there is no stream restoration component. The current design limits permanent impacts to
approximately 43 If of stream, reducing the impact length by approximately 47% of the
previously proposed erosion stabilization design. Further, PSNC proposes to install a
culvert and associated structures which will convey the flow of the stream in a more
graduated manner than previously proposed. Two precast concrete manholes will be
installed which will connect to the outlets of the existing 24 -inch and 18-inch diameter
culverts. The manholes will serve as a debris cleanout access enabling maintenance
access to the culvert for clean out, etc. The existing 24 -inch corrugated metal pipe will
be cut to allow for a tie in to the proposed 33 -inch diameter re- enforced concrete culvert
extension will be installed and covered with approximately 6.5 feet of clean fill material
to provide permanent access to the existing maintained right -of -way. The culvert will be
installed such that the bottom of the culvert conveys water in a gradual manner
downstream. The fill bank above the culvert extension will be re- graded and protected
using rip -rap above the proposed headwall. Boulder -sized energy dissipaters will be
placed at the outlet of the culvert extension to prevent undermining of the culvert and
reduce the velocity of flow before continuing downstream. To the extent practicable,
efforts will be made to utilize stone materials that are similar to materials native to the
area.
2

Response to Request for Additional Information SWE Project No 1356 -14004
Sweetwater Hills Drive Stream Stabilization- Hendersonville, N.0 February 13, 2015
Appropriate sediment and erosion control practices outlined in the most recent version of
the "North Carolina Sediment and Erosion Control Planning and Design Manual" and
approved by the local governing authority shall be in compliance with specifications
governing the proper design, installation, operation and maintenance of such Best
Management Practices to comply with the appropriate turbidity water quality standard.
By copy of this correspondence we are submitting the requested information in support of
a written approval for channel impacts associated with the Sweetwater Hills Drive Stream
Stabilization Project. If you have questions or need additional information, please feel
free to contact us at 704.523.4726.
Sincerely,
S &ME
Crystal Fox, E. J e Law r, P.W.S.
Project Manager nior roject Manager
cfoxna,smeinc.com ilaw [e-mail]
Senior Reviewed by Chris Daves, P.W.S.
Attachments:
Copy of October 14, 2014 N.C. Division of Water Resources Letter
Electronic Communications
Drawings and Specifications 1 -6
Easement Agreement
Cc:
USACE; David Brown
PSNC; Whitney Waldrop

A
North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
October l4, 2014
Whitney Waldrop
PSNC
PO Box 1398
Gastonia, NC 28056
Subject: Request for Additional Information
Sweetwater Hills Stream Restoration
Response due date: November 14, 2014
Dear Ms. Waldrop:
John E. Skvaria, III
Secretary
DWQ Project # 14 -0984
Henderson County
The Division of Water Resources (Division) has performed a preliminary review of a 401 Water Quality
Certification application submitted for the above referenced project. The Division has determined that your
application is incomplete and cannot be processed. The application is on -hold until all of the following
information is received:
1. The project proposes to restore a reach of stream located on a property owned by others not
included in the application documentation. Proof will be needed that the property owners
approve work to be completed on their property, as they will be responsible for the outcome of
the project and compliance with 401 Water Quality Certification conditions.
2. The project proposes the use of gabion baskets, which are not considered an approvable method
to utilize for stream restoration and the design creates an obstacle to aquatic passage, also not
approvable.
Provide stream restoration details based upon natural channel design principles.
If all of the requested information is not received in writing by due date, the Division will be unable to approve
the application and it will be returned. The return of this project will necessitate reapplication to the Division
for approval, including a complete application package and the appropriate fee.
Please respond in writing by November 14, 2014 by sending three copies of all of the above requested
information to the 401 & Buffer Permitting Unit:
401 and Buffer Permitting Unit
1617 Mail Service Center
Raleigh, NC 27699 -1617
Water Quality Regional operations— AahedIs Regional Office
2090 U.S. Hbhway 70, Swannanoa, North Carolina 28778
Phone. [phone] FAX: 828-2M7043
Internet httpJlportalmdenr orgfweblwq
An Equal opportunity 1 Affirmative Action Employer

Whitney Waldrop
October 14, 2014
Page 2 of 2
Please be aware that you have no authorization under the Section 401 of the Clean Water Act for this activity
and any work done within waters of the state may be a violation of North Carolina General Statutes and
Administrative Code. Please call Tim Fox (828) 296 -4664, if you have any questions.
Sincerely,
< � -- -D <- --- -�' �'� �
G. Landon Davidson, P.G., Regional Supervisor
Water Quality Regional Operations
Asheville Regional Office
cc: DWR ARO 401 files
ec: Crystal Fox — S &ME
David Brown - USACE Asheville Regulatory Field Office
Andrea Leslie - NCWRC
(j: 1WR1 WQ\ Henderson140 ]s1Non- DOTISweetwater ]dills Stream Restorationl ADDMO .40ISweetwaterHills.10 -14 -14 docx

tort
Tim Fox - tim.fox @ncdenr.gov
North Carolina Dept of Environment and Natural Resources
Asheville Regional Office
Division of Water Resources — Water Quality Programs
2090 US 70 Highway
Swannanoa, NC 28778
Tel: [phone]
Fax 828 - 299 -7043
Notice Email correspondence to and from this address may be subject to the NC Public Records Law and may be
disclosed to third parties
From: Crystal Fox fmailto.CFox(&smenc coml
Sent: Tuesday, October 21, 2014 12:56 PM
To: Barnett, Kevin
Cc: Moore, Andrew W; Fox, Tim; Brown, David W SAW (David.W.Brown (cbusace. army. mil); Leslie, Andrea J; Sullivan,
Shelton; Carl Rogers; Jason Reeves
Subject: RE: Sweetwater Hill Drive Stream Restoration
Kevin and Andrew,
Thank you for taking the time to speak to us about this With so many moving parts -landowners, safety, access etc -
things get complicated pretty quickly I will pass onto the Engineer's and the client and get back to you ASAP In the
meantime, can you please place this protect "oh hold" as it may take longer to pull this together than November 14
Thanks'
Crystal
From: Barnett, Kevin [mailto:kevin barnettCcbncdenr gov)
Sent: Tuesday, October 21, 2014 11:52 AM
To: Crystal Fox
Cc: Moore, Andrew W; Fox, Tim; Brown, David W SAW (David W Brown (clusace. army. mi1); Leslie, Andrea ]; Sullivan,
Shelton
Subject: Sweetwater Hill Drive Stream Restoration
Good morning Crystal
After in -office discussion, the DWR has concerns about this submittal. We ask that you look at the following:
The proposed gabion basket design will likely result in down channel scour due to stormwater discharges and
the energy created by a —8 foot drop in channel elevation.
The proposed backfilled channel will essentially create an 80 foot long riffle, utilizing rip -rap as a channel bed
material. There is no included proposed channel cross - sectional detail. Utilizing large rock (compared to a
natural channel of similar dimension and drainage area) will likely result in storm flow energy being dissipated
by those erosive velocity vectors not being able to move bedload, will scour the adjacent stream banks, resulting
in instability.

We ask that you evaluate the following alternative design ideas:
• Constructing a rock cross vein immediately below the existing gas line, which would have a smaller step down
to the channel reach below, ( reducing the potential energy scour below the structure) (This may be a
traditional cross vein, or a step tiered structure such as an "A" vein to help deal with storm flow energy)
• Utilizing a "reference" stone size for any resultant backfilled channel as to provide a "natural bedload"
substrate to mimic natural processes such as bedload movement during storm events.
Please include these discussions as part of any response you prepare for the issued Request for Additional information.
Thank you,
Kevin and Andrew
Kevin Barnett - Kevin Barnett @ncdenr Rov
North Carolina Dept. of Environment and Natural Resources
Asheville Regional Office
Division of Water Resources - Water Quality Regional Operations Section
2090 U.S. 70 Highway
Swannanoa, NC 28778
Tel [phone]
Fax- 828 - 299 -7043
E -mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.

Crystal Fox
From: Crystal Fox
Sent: Tuesday, January 06, 2015 12:34 PM
To: 'Fox, Tim'
Cc: Price, Zan (George)
Subject: RE- Sweetwater
Attachments: Sweetwater Plan & Details-Concept 1 WORKING SLS_3 pdf
Gentlemen,
Please see a preliminary culvert option, agreed upon by landowner and PSNC — completely within existing ROW (33
linear feet) Please let me know if there are any glaring concerns from your standpoint
Thanks'
Crystal
From: Fox, Tim [mailto:tim.fox(@ncdenr.gov]
Sent: Friday, December 12, 2014 4:22 PM
To: Crystal Fox
Cc: Price, Zan (George)
Subject: RE: Sweetwater
Crystal,
Yes, we usually request a letter that the property owners are aware or the activity being done on their property
This is usually a copy of the certified letter sent
If the activity will only occur only on the easement or right of way then the gas company will be the responsible party
From your initial project design it appeared that work may be done on the easement and on the neighboring
property in that case we would include the property owner
However, After the on -site meeting it sounded like you will be staying in the easement right of way so we would issue
the 401 to the gas company
Hope this all clears any questions up.
Let me know if you have any additional questions
Have a good weekend
Tim
Tim Fox - tim fox @ncdenr gov
North Carolina Dept of Environment and Natural Resources
Asheville Regional Office
Division of Water Resources — Water Quality Programs
2090 US 70 Highway
Swannanoa, NC 28778
Tel. [phone]
Fax. [phone]
1

Fw 252 sweet water Hills4.txt
From: WALDROP, MAEGAN WHITNEY <MAEGAN.WALDROP @ scana.com>
Sent: Friday, December 19, 2014 8:18 AM
To: Crystal Fox ,
subject: Fw: 252 Sweet water Hills
Crystal,
See Tony's email below which states he talked to the
property owners and they are aware of the project. we do not have a typical letter
we send to
people in situations like this. on larger projects we have land agents who deal
with everything,
as you know. But for something such as this we just have verbal communications
since it is
within existing ROW. Let me know if this will work.
Thank you!
Whitney Waldrop, E.I.
Engineer - III
800 Gaston Road, Building A
P.O. Box 1398
Gastonia, NC 28056
Email: Maegan.waldrop @scana.com
Office: (704) 834 -6621
Mobile: [phone]
Fax: [phone]
From: WOODY, WILLIAM ANTHONY
sent: Thursday, December 18, 2014 7:38 PM
To: WALDROP, MAEGAN WHITNEY; SOUTHWORTH, RUSSELL
Subject: 252 Sweet water Hills
I spoke with Mrs. Condon on Monday Dec 15th about the work to be done in her front
yard. Her and her
husband had looked at both options and had a few questions. we discussed both
options and she
settled on concept 2 version 1 , the concrete box with the culvert. I explained to
her too the best of my
ability what it would look like and that we would have to use it as access to our
ROW. she fully
understood and agreed that the box with the culvert would be the best way to go.
she was really more
worried about us cutting down her Hemlock tree than anything. I also emphasized
that all the work
would stay on our existing ROW , and that the regulator station would be moved but
would still be
within the 50ft ROW just over to one side to allow access . She was very
understanding and just wanted
us to keep them in the loop if anything changed. If you have any more questions just
give me ring.
Tony woody
PSNC Energy
828 -551 -5721
Page 1

Castal Fox
Frown:
WALDROP, MAEGAN WHITNEY <MAEGAN.WALDROP @scana com>
Sent:
Thursday, February 05, 2015 8 21 AM
To:
Crystal Fox
Cc:
Carl Rogers
Subject:
FW Sweetwater Concept "Final Drafts"
Just heard back from the property owner and they are ok with the final design as well.
Whitney Waldrop, E.I.
Engineer - III
800 Gaston Road, Building A
P.O. Box 1398
Gastonia, NC 28056
Email: Maep-an Waldron(& scana com
Office: (704) 834 -6621
Mobile- (704) 813 -7163
Fax [phone]
From: SOUTHWORTH, RUSSELL
Sent: Thursday, February 05, 2015 8:16 AM
To: WALDROP, MAEGAN WHITNEY
Subject: Re: Sweetwater Concept "Final Drafts"
uup he dust spoke with Mrs Condon and they are good with the design.
RS
Sent from my BlackBerry 10 smartphone on the Verizon Wireless 4G LTE network
From: WALDROP, MAEGAN WHITNEY
Sent: Thursday, February 5, 2015 8:05 AM
To: SOUTHWORTH, RUSSELL
Subject: FW• Sweetwater Concept "Final Drafts"
Hate to keep asking about this, but it's in DENR's hand and we need to give them a direction as to what we are
planning to do Let me know if we think we need to hold off on this
Thank yaI
Whitney Waldrop, E.I
Engineer - III
800 Gaston Road, Building A
P O Box 1398
Gastonia, NC 28056
Email- Maeaan Waldrot)O�scana com
Office- (704) 834 -6621

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CONSTRUCTION SEQUENCE:
1. CONFIRM THAT ALL REQUIRED PERMITS AND APPROVALS HAVE BEEN OBTAINED. NOTIFY LANDOWNER OF S•I'OPE AND TIMELINE OF WORK TO BE DONE.
CONTRACTOR IS RESPONSIBLE FOR NOTIFYING NC ONE CALL FOR LOCATION OF EXISTING UTILITIES PRIOR TO PERFORMING ANY WORK ON SITE.
2. INSTALL ORANGE CONSTRUCTION FENCE AS SHOWN ON THE PLAN.
3. INSTALL SILT FENCE AS SHOWN ON PLAN. SEGMENT OF SILT FENCE LOCATED AT THE PROPOSED HEADWAL_ SHALL BE INSTALLED DURING FINAL CLEANUP
PHASE OR WHEN SITE CONDITIONS EXPOSE THE STREAM TO POSSIBLE SEDIMENTATION. INSTALL REQUIRE- SAND BAG SILT CHECK.
4. ALL INSTALLED EROSION AND SEDIMENT CONTROL MEASURES MUST BE INSTALLED AND MAINTAINED IN ACCORDANCE WITH THE DENR EROSION AND SEDIMENT
CONTROL MANUAL. MEASURES SHALL BE INSPECTED TO ENSURE THEY ARE OPERATING IN ACCORDANCE V't'�. H THE PERMITS AND AS INTENDED TO PREVENT
SEDIMENTATION TO WATER RESOURCES OR IMPACTING ADJACENT PROPERTIES. CONTRACTOR SHALL INSPECT MEASURES EVERY SEVEN (7) DAYS AND WITHIN
24 HOURS OF PRECIPITATION AMOUNTS EXCEEDING 0.5 INCHES. REPAIRS SHALL BE CONDUCTED AS SOON =:S POSSIBLE, AND BEFORE THE NEXT RAIN EVENT.
THE CONTRACTOR SHALL ASSUME RESPONSIBILITY FOR INSTALLING MEASURES AS NEEDED TO PREVENT SEDIMENTATION.
5. INSTALL PUMP -AROUND BYPASS MEASURES. REFER TO DETAIL 6/5. THE DETAIL IS SCHEMATIC ONLY; IT IS T -i= RESPONSIBILITY OF THE CONTRACTOR TO TAILOR
BYPASS MEASURES TO SITE CONDITIONS, WHILE ADHERING TO THE SPECIFICATIONS SHOWN IN THE DETAIL...
6. PERFORM CLEARING NECESSARY TO INSTALL CONSTRUCTION ENTRANCE.
7. INSTALL CONSTRUCTION ENTRANCE. REFER TO DETAIL 414.
8. PERFORM CLEARING NECESSARY TO DO WORK. REFER TO DETAILS FOR APPLICABLE CLEARING INSTRUCTIONS.
9. PERFORM MODIFICATION TO EXISTING PIPES, PERFORM NECESSARY EXCAVATION AND INSTALL MANHOLES -ND NEW 18" STORM PIPE. PLAN WORK TO OCCUR "IN
THE DRY" WHERE WORK IS CONDUCTED WITHIN THE STREAM. FILTER BAGS SHALL BE USED FOR DEWATER.''sG GROUNDWATER WHICH MAY INTRUDE INTO THE
EXCAVATION, SEE DETAIL 214.
10. IF IT BECOMES NECESSARY TO CROSS THE EXISTING STREAM, INSTALL TEMPORARY STREAM CROSSING. REFER TO DETAIL 7/5 FOR TEMPORARY STREAM
CROSSING. CONTRACTOR TO DETERMINE METHODS FOR TEMPORARY STREAM CROSSING SUITABLE TO SI'c CONDITIONS.
11. PERFORM CLEARING NECESSARY TO INSTALL NEW 33" RCP AND HEADWALL.
12. INSTALL NEW PIPE AND HEADWALL. INSTALL SILT FENCE AROUND HEADWALL BEFORE BEGINNING INSTALL -`-ION OF BOULDER STEP-DOWN.
13. INSTALL BOULDER STEP-DOWN. ENSURE EROSION CONTROL MEASURES ARE IN PLACE AND OPERATING D+:'MNG INSTALLATION. MEASURES MAY NEED TO BE
REMOVED TEMPORARILY TO FACILITATE INSTALLATION. HOWEVER, ALL SEDIMENT AND EROSION CONTROL MEASURES MUST BE REPLACED BY THE END OF THE
WORK DAY EACH DAY, AND BEFORE THE NEXT RAIN EVENT.
14. UPON COMPLETION OF CONSTRUCTION, STABILIZE ALL DISTURBED AREAS OUTSIDE OF THE STREAM CHANN EL ACCORDING TO THE SEEDING SPECIFICATIONS
SHOWN ON SHEET 5, TO THE APPROVAL OF THE LANDOWNER AND PSNC.
15. FOLLOWING COMPLETION OF ONSITE CONSTRUCTION ACTIVITIES, ALL EROSION AND CONTROL MEASURES VdJST REMAIN IN PLACE UNTIL SITE IS STABILIZED AND
80% VEGETATIVE COVER HAS BEEN ESTABLISHED.
REQUIRED
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TOPOGRAPHIC SURVEY AND MAPPING PROVIDED BY VAUGHN & MELTON ON OCTOBER 7, 2013. EXISTING DRAWING OF: z
i' CONDITIONS SHOWN MAY DIFFER FROM ACTUAL SITE CONDITIONS. THE CONTRACTOR SHALL BE EXISTING LIGHT POLE
RESPONSIBLE FOR CONFIRMING SITE CONDITIONS. PLEASE NOTE THIS DATA IS FOR INFORMATIONAL
% . / - PURPOSES ONLY. IT IS NOT MEANT FOR DESIGN, LEGAL, OR ANY OTHER USES. THERE ARE NO ( IN FEET
GUARANTEES ABOUT ITS ACCURACY. S&ME, INC. ASSUMES NO RESPONSIBILITY FOR ANY DECISIONS MADE 1 inch = 4 ft.
OR ACTIONS TAKEN BY THE USER BASED UPON INFORMATION OBTAINED FROM THIS PLAN SET.
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1. IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO IMPLEMENT EROSION AND SEDIMENT CONTROL MEASURES IN
ACCORDANCE WITH THE LATEST VERSION OF THE NC DENR EROSION AND SEDIMENT CONTROL MANUAL. MAT
EXISTING MULCHED AREA Q 6
/ t if f 2. ALL CONSTRUCTION MATERIALS AND METHODS, INCLUDING PRECAST CONCRETE STRUCTURES, PIPES, AND AGGREGATES PROJECT NUMBER ma
. DI EXISTING DROP INLET O® R AND RIPRAP, SHALL MEET NCDOT STANDARDS AND SPECIFICATIONS.
=
CMP EXISTING CORRUGATED METAL PIPE 1356-13-004 PH.
3. RETENTION, RELOCATION, OR REMOVAL OF LANDSCAPING SHALL BE IN ACCORDANCE WITH PSNC ENERGY POLICY AND RCP EXISTING REINFORCED CONCRETE PIPE SCALE: DATE: 1
® A THEIR AGREEMENT WITH THE LANDOWNER.
AS SHOWN 2-13-2015 Q a
SURVEY NOTE: R�W EXISTING RIGHT OF WAY
/ f R
Jr f 0 2 4 s EXISTING PROPERTY LINE m
TOPOGRAPHIC SURVEY AND MAPPING PROVIDED BY VAUGHN & MELTON ON OCTOBER 7, 2013. EXISTING DRAWING OF: z
i' CONDITIONS SHOWN MAY DIFFER FROM ACTUAL SITE CONDITIONS. THE CONTRACTOR SHALL BE EXISTING LIGHT POLE
RESPONSIBLE FOR CONFIRMING SITE CONDITIONS. PLEASE NOTE THIS DATA IS FOR INFORMATIONAL
% . / - PURPOSES ONLY. IT IS NOT MEANT FOR DESIGN, LEGAL, OR ANY OTHER USES. THERE ARE NO ( IN FEET
GUARANTEES ABOUT ITS ACCURACY. S&ME, INC. ASSUMES NO RESPONSIBILITY FOR ANY DECISIONS MADE 1 inch = 4 ft.
OR ACTIONS TAKEN BY THE USER BASED UPON INFORMATION OBTAINED FROM THIS PLAN SET.

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PROPERTY
TEST METHOD
MINIMUM STANDARD
AVG. WIDE WIDTH STRENGTH
ASTM
D-4884
60 LB/IN
GRAB TENSILE
ASTM
D-4632
205 LB
PUNCTURE
ASTM
D-4833
110 LB
MULLEN BURST
ASTM
D-3786
350 PSI
UV RESISTANCE
ASTM
D-4355
70%
AOS % RETAINED
ASTM
D-4751
80 SIEVE
ANCHOR SKIRT 4 MINIMUM
A TEMPORARY COFFER DAM SHALL BE CONSTRUCTED AT THE STORM WATER OUTLET PIPES DURING
CONSTRUCTION TO CAPTURE SEDIMENT AND OTHER PARTICULATE MATTER. THE STORM WATER SHALL BE
GENERAL NOTES: MAINTENANCE NOTES: PUMPED FROM THE COFFER DAMS THROUGH THE FILTER BAG LOCATED OUTSIDE OF ANY JURISDICTIONAL
AREAS.
1. PREFABRICATED SILT FENCE IS NOT ACCEPTABLE ON THIS PROJECT. 1. INSPECT SEDIMENT FENCES AT LEAST ONCE A WEE.-,,', AND AFTER EACH RAINFALL EVENT THAT EXCEEDS 0.5 INCHES
WITHIN A 24 HOUR PERIOD. MAKE ANY REQUIRED RaPAIRS IMMEDIATELY. A SUITABLE MEANS OF ACCESSING THE BAG WITH MACHINERY REQUIRED FOR DISPOSAL PURPOSES SHALL BE
2. WOOD POSTS SHALL BE USED WITHIN FIVE FEET OF THE EXISTING GAS MAIN. IN ALL OTHER AREAS, STEEL POSTS SHALL BE USED ON PROVIDED. FILTER BAGS SHALL BE REPLACED WHEN THEY BECOME 1/2 FULL OF SEDIMENT. SPARE BAGS SHALL
THIS PROJECT INSTEAD OF WOOD POSTS. 2. SHOULD THE FABRIC OF A SEDIMENT FENCE COLLA:=SE, TEAR, DECOMPOSE OR BECOME INEFFECTIVE, REPLACE IT BE KEPT AVAILABLE FOR REPLACEMENT OF THOSE THAT HAVE FAILED OR ARE FILLED. BAGS SHALL BE PLACED L.i_
PROMPTLY. ON STRAPS TO FACILITATE REMOVAL UNLESS BAGS COME WITH LIFTING STRAPS ALREADY ATTACHED.
3. FILTER FABRIC FENCE SHALL BE A MINIMUM OF 32" IN WIDTH AND SHALL.�.AVE A MINIMUM OF 6 LINE WIRES WITH 12"
STAY SPACING. 3. REMOVE SEDIMENT DEPOSITS AS NECESSARY TO P`OVIDE ADEQUATE STORAGE VOLUME FOR THE NEXT RAIN AND BAGS SHALL BE LOCATED IN WELL -VEGETATED (GRASSY) AREA WITHIN THE PERMITTED WORKSPACE, AND C, LL
TO REDUCE PRESSURE ON THE FENCE. TAKE CARE TO AVOID UNDERMINING THE FENCE DURING CLEANOUT. DISCHARGE ONTO STABLE, EROSION RESISTANT AREAS. WHERE THIS IS NOT POSSIBLE, A GEOTEX11LE
4. WOVEN FILTER FABRIC SHALL BE USED WHERE SILT FENCE IS TO REMAi' FOR A PERIOD OF MORE THAN 30 DAYS. UNDERLAYMENT AND FLOW PATH SHALL BE PROVIDED. BAGS MAY BE PLACED ON FILTER STONE TO INCREASE J
4. REMOVE ALL FENCING MATERIALS AND UNSTABLE S,-DIMENT DEPOSITS AND BRING THE AREA TO GRADE AND DISCHARGE CAPACITY. BAGS SHALL NOT BE PLACED ON SLOPES GREATER THAN 5%. FOR SLOPES EXCEEDING
5. STEEL POSTS SHALL BE 5'-0" IN HEIGHT AND BE OF THE SELF -FASTENER ANGLE STEEL TYPE. STABILIZE IT AFTER THE CONTRIBUTING DRAINAGE -',REA HAS BEEN PROPERLY STABILIZED. 5%, CLEAN ROCK OR OTHER NON -ERODIBLE AND NON-POLLUTING MATERIAL MAY BE PLACED UNDER THE BAG Z
REF: 6.62.7 NC Erosion and Sediment Control Planning and E�esign Manual, 2006 TO REDUCE SLOPE STEEPNESS.
6. TURN SILT FENCE UP SLOPE AT ENDS.
NO DOWNSLOPE SEDIMENT BARRIER IS REQUIRED FOR MOST INSTALLATIONS. COMPOST BERM OR COMPOST
7. SILT FENCE SHALL BE STANDARD STRENGTH FILTER FABRIC WITH WIRE +dESH REINFORCEMENT OR EXTRA STRENGTH FILTER SOCK SHALL BE INSTALLED BELOW BAGS LOCATED IN HQ OR EV WATERSHEDS, WITHIN 50 FEET OF AY
FILTER FABRIC. RECEIVING SURFACE WATER OR WHERE GRASSY AREA IS NOT AVAILABLE.
8. WHEN FABRIC IS USED WITH WIRE MESH, 8' CENTERED POSTS MAY BE U?_p, THE PUMP DISCHARGE HOSE SHALL BE INSERTED INTO THE BAGS IN THE MANNER SPECIFIED BY THE m
MANUFACTURER AND SECURELY CLAMPED. A PIECE OF PVC PIPE IS RECOMMENDED FOR THIS PURPOSE.
9. THE USE OF SILT FENCE IN AREAS OF CONCENTRATED FLOW IS INAPPRC?RIATE.
THE PUMPING RATE SHALL BE NO GREATER THAN 750 GPM OR 1/2 THE MAXIMUM SPECIFIED BY THE
MANUFACTURER, WHICHEVER IS LESS. PUMP INTAKES SHALL BE FLOATING AND SCREENED.
1 TYPICAL SILT (FENCE DETAIL
RNOT RESUME UNTILTHE PROBLEMS CORRECTED.
FILTER BAGS SHALL BE
INSPECTED DAILY. PROBLEM IS DETECTED, PUMPING SHALL CEASE IMMEDIATELY
�, SCALE: N.T.
2 FILTER EAG
N.T.S. z
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WORK AREA 50-FEE7 SILT BAG OR
DEWATERING STRUCTURE
PUMP
TRENCH DEWATERING
HOSE
IIIELI
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II III III III -I I III
III-
=-' I III III III I 1III-111 III-III-° ' I Q��G�
FINISHED GRADE
oP COMPACTED
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HOSEPUMP DISCHARGE °
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I 6 MIN. 12" MINIMUM
,_III III III III III III ,I
I I (1 ( I I I SOIL COVER
CULVERT 13
(IF NEEDED, BASED ON 2"-3" COARSE AGGREGATE - _ W
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((I _III III- FIELD CONDITIONS) 12' -) I I > � U
MIN. i i i i Z
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GENERAL NOTES: U (1) tD _
1. PLACE 8 NsY NON -WOVEN GE07 XTILE BENEATH STONE. ' ' ' SPRING LINE
Z W
TRENCH DEWATERING MAINTENANCE NOTES 2. IF ROADSIDE SWALE IS PRESENT,, CONTRACTOR SHALL INSTALL CULVERT SUFFICIENT TO w W � Z
TRENCH DEWATERING NOTES ���...JJJ
ADEQUATELY CONVEY STORMW,+TER FLOW. I I ( 0 000 0o OOO U `Z Q
1. WATER PUMPED OUT OF TRENCH SHALL NOT BE DISCHARGED 1. REMOVE AND PRO-ERLY DISPOSE OF SILT BAG UPON -
COMPLETION OF PJMPING OPERATIONS OR AFTER BAG HAS IONS OF CONSTRUCTIO i ENTRANCE MAY HAVE TO BE ALTERED BASED ON CONDITIONS IN -III O OO 0 ® Q_ w W
INTO WATERWAYS. WATER SHALL BE DISCHARGED INTO A SILT 3. DIMENSIONS
BAG OR DEWATERING STRUCTURE LOCATED IN A WELL REACHED CAPAC'=(, WHICHEVER OCCURS FIRST. UNDER NO THE FIELD. I I I O O 0 00 0
VEGETATED AREA AT LEAST 50 -FEET AWAY FROM A STREAM OR CIRCUMSTANCES SHALL USED SILT BAGS BE LEFT IN PLACE _ LU
WETLAND. FOR A PERIOD OF` IME GREATER THAN 48 HOURS AFTER NOTES: - O 0 00 O 0 O00 O 6LIJ
DEWATERING OPERATIONS ARE COMPLETE. MAINTENANCE -I I ( 0 _
2. TIGHTLY SEAL SLEEVE AROUND THE PUMP DISCHARGE HOSEN
I I I I (f
WITH A STRAP OR SIMILAR DEVICE. 2. SPREAD THE DEVb:-TERED SEDIMENT FROM THE BAG IN AN 1. INSPECT CONSTRUCTION ENTRA„"ICES AT LEAST WEEKLY AND AFTER EACH RAINFALL EVENT THAT
APPROVED UPLAND AREA AND STABILIZE WITH SEED AND MULCH EXCEEDS 0.5 INCHES WITHIN A 24HOUR PERIOD AND MAKE ANY REQUIRED REPAIRS IMMEDIATELY. -) I I III III
3. CONTROL PUMPING RATE TO PREVENT EXCESSIVE PRESSURE BY THE END OF THE WORK DAY. DURING PERIODS OF HEAVY USE. THE CONSTRUCTION ENTRANCE SHOULD BE INSPECTED MORE
WITHIN THE SILT BAG IN ACCORDANCE WITH THE FREQUENTLY.
MANUFACTURER RECOMMENDATIONS OR SO THAT DISCHARGE 3. REPLACE FILTER EIAG IF BAG CLOGS OR HAS RIPS, TEARS, OR 0
D/2 PIPE D/2 #57 WASHED STONE MIN. 6 INS THICK
DOES NOT OVERFLOW DEWATERING STRUCTURE. AS THE BAG PUNCTURES. DUF :SIG OPERATION KEEP CONNECTION BETWEEN 2. THE ENTRANCE WILL BE MAINTA, `'JED IN A CONDITION THAT WILL PREVENT TRACKING OR FLOWING
FILLS WITH SEDIMENT, REDUCE PUMPING RATE ACCORDINGLY. PUMP HOSE AND FLTER BAG WATER TIGHT. REPLACE BEDDING OF SEDIMENT ONTO EXISTING R-'ADWAYS. SEDIMENT TRACKED, SPILLED, DROPPED ORELOW PIPE AND COMPACT UNDER HAUNCHES
O.D.OD
IF IT BECOMES DI.OTHERWISE DEPOSITED ONTO F OADWAYS WILL BE SWEPT UP AS SOON AS PRACTICAL AND HAULED
?LACED. TO SPRING LINE. NCDOT TYPE 3 FILTER FABRIC (g,1
SHALL BE PLACED BENEATH ALL STONE MATERIALS. y
4. PUMP SUCTION HOSE MUST NOT BE ALLOWED TO COME IN OFF-SITE FOR PROPER DISPOSA,_.
CONTACT WITH TRENCH BOTTOM. PROVISIONS MUST BE MADE 4. CONTRACTOR SH -LLL ONLY INSTALL ONE DEWATERING HOSE
TO ELEVATE THE SUCTION HOSE TO AT LEAST ONE FOOT ABOVE PER FILTER BAG.
THE BOTTOM OF THE PIPE TRENCH UNTIL BOTTOM DEWATERING 3. IF EXCESS SEDIMENT HAS CLOCvED THE PAD, THE ENTRANCE WILL BE TOPDRESSED WITH NEW ENGINEERING LICENSE No:
IS NECESSARY. STONE AS NEEDED. REPLACEME_`NT OF THE ENTIRE PAD MAY BECOME NECESSARY WHEN THE PAD F-0176
BECOMES ENTIRELY FILLED WIT: -1 SEDIMENT AND MUD.
�JTYPICAL CIRCULAR PIPE BEDDINGBACKFILL DETAIL DRAWN BY: CHECKED BY:
5. DEWATERING SHALL NOT OCCUR DURING TIMES OF HEAVY y
RAINFALL EXCEPT AS REQUIRED TO PREVENT FLOODING OF 4. THE CONSTRUCTION ENTRANCE'INILL BE REMOVED WHEN CONSTRUCTION ACTIVITIES CEASE ON N.T.S.
MAT/SLS
CONSTRUCTION EQUIPMENT LOCATED IN BORE PITS AND THE PROJECT. THE REMOVED SONE AND SEDIMENT FROM THE ENTRANCE WILL BE HAULED
TRENCHES. OFF-SITE AND DISPOSED OF PRC!?ERLY.
DESIGNED BY: APPROVED BY:
6. PUMPS UTILIZED DURING DEWATERING SHALL BE PLACED WITHIN 5. BRING THE AREA TO GRADE ANC STABILIZE IT.
MAT
SECONDARY CONTAINMENT IF POSITIONED WITHIN 100 FEET OF
PROJECT NUMBER
A WETLAND OR WATERBODY. CD
a
1356-13-004 PH. 19
S TYPICAL TRENCH DEWATERING DETAIL 4 TYPICAL CONSTRUCTION ENTRANCE DETAIL SCALE: DATE:
4 NTS AS SHOWN 2-13-2015 a
4 NTS
a
DRAWING: OF: z
0

DEFINITION TEMPORARY SEEDING SPECIFICATIONS (PIEDMONT)
Controlling runoff and erosion on disturbed areas by establishing perennial vegetative cover
with seed. Grund stabilization shall be performed within 7 calendar days on perimeter areas and
sicoes greater than 3H:1V. Ground stabilization shall be performed within 14 calendar days
PURPOSE in saher areas.
To reduce erosion and decrease sediment yield from disturbed areas, and to permanently Uj M
stabilize such areas in a manner that is economical, adapts to site conditions, and allows SEEDING MiXTURE (FALL)
selection of the most appropriate plant materials.
a
Species" Rate (ib/acre) m N
SPECIFICATIONS Rye Grain (Seca/e cerea/e) 120 20 -FEET MiN. PUMP AROUND STREAM CROSSING NOTES: Z N N
20 -FEET MIN. I i a V r-
20-FEET
1 M
SEEDBED REQUIREMENTS SEEDING MIXTURE (LATE WINTER EARLY SPRING) I i 1. REFER TO AUTHORIZED PERMITS FOR ADDITIONAL LOCAL, STATE, AND FEDERAL REQUIREIt1ENTS. ®" Z
Establishment of vegetation should not be attempted on sites that are unsuitable due to Species* Rate (Ib/acre) j w o
excessive soil compaction, inappropriate soil texture, poor drainage, concentrated overlandRye Grain (Secale cerea/e) 120 t t 2. MECHANICAL EQUIPMENT SHALL NOT OPERATE WITHIN STREAMS OR TRAVERSE STREAMS'f"IITHOUT THE USE OF TEMPORARY BRIDGES. = p C
flow, or steepness of slope until measures have been taken to correct these problems. t
Annual (Korean) Lespedeza (Kummerowia st/pulacea) 50 'Z ILT FENCE
tt t 3. CONSTRUCT TEMPORARY SAND BAG SILT CHECKS WITHIN EDGES OF CONSTRUCTION EASEMENT. CONSTRUCT DAMS USING SANDBAGS COVERED 05 CC 0-
To maintain a good stand of vegetation, the soil must meet certain minimum requirements as SANDBAG WITH CLEAN 20 MIL HDPE LINER OR CLEAN STEEL PLATE DRIVEN INTO THE STREAM BANKS AND STREAM BED. USE SANDBAGS TO SHORE STEEL PLATE n U
a growth medium. The existing soil should have these criteria: SEEDING MIXTURE (SUMMER) SILT CHECK IF NEEDED. CONTRACTOR MAY USE OTHER MATERIALS FOLLOWING APPROVAL FROM GAS COMPANY OR THEIR AGENT. rn
® Enough fine-grained (silt and clay) material to maintain adequate moisture and nutrient Species* Rate (Ib/acre)
4. THE HEIGHT OF THE SAND BAG SILT CHECK SHALL BE CALCULATED BY USING Hl4 + 1 WHEt✓E H = HEIGHT OF STREAM BANK IN FEET WITH A 2 -FEET
supply (available water capacity of at least .05 inches water to 1 inch of soil). German Millet (Setaria Italica) 40 MINIMUM DAM HEIGHT. ADDITIONAL HEIGHT MAY BE REQUIRED BASED ON FLOW CONDITIONS AT THE TIME OF CONSTRUCTION.
® Sufficient pore space to permit root penetration. Q
SEDIMENT TUBE R 5. CONTRACTOR SHALL DEWATER AREA BETWEEN DAMS AND ENSURE TIGHT SEAL OF DAMS PRIOR TO CONSTRUCTION IN STREAM. CONTRACTOR SHALL
SEEDING DATES � TEMPORARY BRIDGE 50 -FOOT CONSTRUCTION
EARTHEN BEaM BE RESPONSIBLE FOR PASSING ALL WATER WHICH 1S TO BE FILTERED THROUGH A SILT BA.. PLACED ON APPROPRIATE ELSE MEASURE.* ,
® Sufficient depth of soil to provide an adequate root zone. The depth to rock or Fail: Aug. 15 - Dec. 30 EASEMENT DEWATERING PUMPS SHALL BE PLACED WITHIN SECONDARY CONTAINMENT. 0®t`
impermeable layers such as hardpans should be 12 inches or more, except on slopes La = winter (early spring): Jan. 1 - May 1 Late d
steeper than 2:1 where the addition of soil is not feasible. VIt
S -:-amen: May 1 -Aug. 15 6. SCREEN PUMP INTAKES TO MINIMIZE ENTRAINMENT OF AQUATIC LIFE. PLACE PUMP INTAKE UPSTREAM OF WORK AREA. MEASURES MUST BE IN PLACE
TO PREVENT THE FLOW OF STREAM WATER ONTO THE CONSTRUCTION RIGHT OF WAY. PLACE BYPASS HOSE OUTSIDE OF STREAM BANKS WITH
® A favorable pH range for plant growth, usually 6.0 - 6.5. l DISCHARGE DOWNSTREAM OF DOWNSTREAM SAND BAG SILT CHECK BEFORE COMMENCING BYPASS. TAKE MEASURES TO PREVENT STREAMBED
SOIL AMENDMENTS I SCOUR AT PUMP DISCHARGE. TAKE REASONABLE MEASURES TO PREVENT INTAKE FROM SUCTIONING THE STREAM SUBSTRATE.
® Free from large roots, branches, stones, large clods of earth, or trash of any kind. Clods Fallow recommendations of soil tests or apply 2,000 Ib/acre ground agricultural limestone j
and stones may be left on slopes steeper than 3:1 if they are to be hydro seeded. ai-d 750 Ib/acre 10-10-10 fertilizer. i 7. THE PUMP(S) SHALL BE OF SUFFICIENT SIZE TO CONVEY NORMAL STREAM FLOW. HAVE STANDBY PUMPS AND GENERATORS CAPABLE OF HANDLING
if 100% OF ANTICIPATED FLOW ON-SITE IN CASE OF PUMP FAILURE OR A RAIN EVENT. CONTI'�UOUSLY MONITOR THE DAM AND PUMPS TO ENSURE
If any of the above criteria are not met - i.e., if existing soil is too coarse, dense, shallow or 10' TYP. I 1
i 1 PROPER OPERATION THROUGHOUT THE WATERBODY CROSSING. ALL PUMPS SHALL BE PLACED WITHIN SECONDARY CONTAINMENT TO REDUCE
acidic to foster vegetation - special amendments are required. The soil conditioners IUULCH S6_'DPE ! POTENTIAL FOR FUEL SPILLS.
described below may be beneficial or, preferably, topsoil may be applied. A aly 4,000 Ib/acre straw. Anchor mulch by tacking with asphalt, roving or a mulch anchoring WORK AREA / I
tcci. A disk with blades set nearly straight can be used as a mulch anchoring. tool. DEWATERING HOSE I ! 8. ALL STREAM CROSSINGS SHOULD BE MADE PERPENDICULAR TO THE STREAM TO THE EXT -NT PRACTICAL OR AS SHOWN ON PERMITTED PLANS.
SEEDBED PREPARATION INSTALL SILT FENCE PERPENDICULAR TO THE CONSTRUCTION EASEMENT AT STREAM CROSSINGS. EXTEND SILT FENCE 20 -FEET MINIMUM ON BOTH
Install necessary mechanical erosion and sedimentation control practices before seeding, i
I SIDES OF EDGE OF CONSTRUCTION EASEMENT OR AS SHOWN ON PLANS.
and complete grading according to the approved plan. MAINTENANCE SILT FENCE OR � /
R fertilize if growth is not fully adequate. Reseed, re -fertilize and mulch immediately SEDIMENT/ j 1 9. LIMIT THE REMOVAL OF VEGETATION TO THE CONSTRUCTION EASEMENT AREA. ONLY HAND CLEARING IS ALLOWED ON STREAM BANKS.
Lime and fertilizer needs should be determined by soil tests. Directions, sample cartons, and fokowmg erosion or other damage. TUBES
information sheets are available through county Agricultural Extension offices. Testing is PUMP �i / 10. STREAM CROSSINGS SHOULD BE CONDUCTED "IN THE DRY" WITHIN 24 HOURS TO THE FULLEST EXTENT PRACTICAL. BEGIN 7NSTREAM WORK IN THE
also done by commercial laboratories. <c 21 / MORNING TO ALLOW FOR 24 HOUR INSTALLATION (OR AS SOON AS PRACTICAL). CONTRAC70R SHALL ATTEMPT TO SEGREGATE STREAM SUBSTRATE
*R. F: 6.10 A,B and G, NC Erosion and Sediment Control Planningand Design Manual, 2006 SILT BAG O 97 /
g ® �/ / FROM SUBGRADE. INITIATE CONSTRUCTION ONLY AFTER CONFIRMING THAT INCLEMENT WEATHER IS NOT ANTICIPATED. LIMIT DISTURBANCE TO
When soil tests results are not available, follow rates suggested in the seeding specifications
COQ Off% PUMP STREAM BANKS TO THE EXTENT PRACTICAL AND PER PERMITTED PLANS.
shown below. Application rates usually fall into the following ranges: �I
PERMANENT SEEDING SPECIFICATIONS (PIEDMONT) Oi
�t I 11, NO WASTES, SPOILS, SOLIDS OR FILLS WILL BE PLACED WITHIN STREAMS, WETLANDS OR RIPARIAN AREAS BEYOND THE LIMITS OF THOSE DEPICTED ON
® Ground agricultural limestone: II I THE DRAWINGS.
Light -textured, sand soils: 1 to 1-1l2 tonstacre / -- -
9 Y G 3und stabilization shall be performed within 7 calendar days on perimeter areas and I I
/ 12. ALL STREAM CROSSINGS SHALL BE RESTORED TO ORIGINAL CONTOURS, ORAS DEPICTED ON THE PERMITTED PLANS.
Heavy -textured, clayey soils: 2-3 tons/acre
copes greater than 3H:1 V. Ground stabilization shalt be performed within 14 calendar days � l
o Fertilizer.
it tither areas. f �y
20 -F'= -.'ET MIN. � ST EAM 20 -FEET MIN. 13. IF CONSTRUCTION ACTIVITIES REQUIRE EQUIPMENT TO CROSS THE STREAM, TEMPORARY BRIDGING WILL BE USED. LL Grasses: 800-1200 ib/acre of 10-10-10 (or the equivalent) i F�OW
Grass -legume mixtures: 800-1200 lb/acre of 5-10-10 (or the equivalent) SEEDING MIXTURE t 14. ADDITIONAL MEASURES MAY BE NECESSARY IN ORDER TO PROTECT AFFECTED STREAMS AND WETLANDS.
Species* Rate (ib/acre) SCREENED
Apply lime and fertilizer evenly and incorporate into the top 4-6 inches of soil by disking or INTAKE
other suitable means. Operate machinery on the contour. When using a hydro seeder,
apply lime and fertilizer to a rough, loose surface. Tall fescue (Festuca arundinacea) (Grass lined Channels) 200
Tall fescue (Festuca arcrnd/nacea ) (Other Areas) 100 J ~ U
EXISTING Z
Roughen surfaces prior to seeding. 24CMP
Complete seedbed preparation by breaking up large clods and raking into a smooth, uniform N`U'RSE PLANTS
surface (slopes less than 3:1). Fill in or level depressions that can collect water. Broadcast Baveen May 1 and Aug. 15, add 10 Ib/acre German millet (Setar/a /tallca ) or 15 ib/acre SCREENED INTAKE �—
seed into a freshly loosened seedbed that has not been sealed by rainfall. S-dan grass. Prior to May 1 or after Aug. 15, add 40 Ib/acre Rye Grain (Festuca IN DITCH ABOVE
anIndinacea
PLUGGED CU)VERT 6 TYPICAL STREAM CROSSING DETAIL }
). 5 m
SEEDING NTS
Seeding dates given in the seeding mixture specifications are designated as "best" or SEEDING DATES
"possible". Seedings properly carried out within the "best" dates have a high probability of Best Possible DURING CONSTRUCTION
success. It is also possible to have satisfactory establishment when seeding outside these
Fail: Aug. 25 -Sept. 15 Aug. 20 -Oct. 25 TYPICAL STREAM BYPASS
dates. However, as you deviate from them, the probability of failure increases rapidly.
Seeding on the last date shown under "possible" may reduce changes of success by 30-50%. La 1,a winter: Feb. 15 - Mar. 21 Feb. 1 -Apr. 15
Always take this into account in scheduling land -disturbing activities.
Use certified seed for permanent seeding whenever possible. Fati is best for tall fescue (Festuca arundinacea ) and late winter or summer for lespedeza.
&rar seeding of Kobe lespedeza (Kummerowia striata) over fall -seeded tall fescue is very
Labeling of non -certified seed is also required by law. Labels contain important information enactive.
on seed purity, germination, and presence of wood seeds. Seeds must meet State O
standards for content of noxious weeds. Do no accept seed containing "prohibited" noxious SOIL AMENDMENTS z
i=
weed seed. FLtcly lime and fertilizer according to soil tests, or apply 4,000 ib/acre ground agricultural
0..
iY
Inoculate legume seed with the Rhizobium bacteria appropriate to the species of legume. li :-t stone and 1,000 Ib/acre 10-10-10 fertilizer.
U
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Apply seed uniformly with a cyclone seeder, drop -type spreader, drill, cultipacker seeder, or MULCH W
hydro seeder on a firm, friable seedbed. 11 pply 4,000-5,000 Ib/acre grain straw or equivalent cover of another suitable mulching
When using a drill or cuitipacker seeder, plant small grains no more than 1 inch deep, r,aterial. Anchor mulch by tacking with asphalt, roving, or netting. Netting is the preferred
grasses and legumes no more than 112 inch. Equipment should be calibrated in the field for anchoring method on steep slopes.
the desired seeding rate.
IV.,AINTENANCE
When using broadcast -seeding methods, subdivide the area into workable sections and { j -fertilize in the second year unless growth is fully adequate. May be mowed once or twice
determine the amount of seed needed for each section. Apply one-half the seed while c .rear, but mowing is not necessary. Reseed, fertilize, and mulch damaged areas TIMBER EQUIPMENT MA TS
moving back and forth across the area, making a uniform pattern: then apply the second half mediately. 14-FEETX 16-FEETX8-INCH THICK)
in the same way, but moving at right angles to the first pass.
W
Mulch all plantings immediately after seeding. ~=F: 6.11 L NC Erosion and Sediment Control Planning and Design Manual, 2006
HYDRO SEEDING ( 4
DESCRIPTION: Q
Surface roughening is particularly important when hydro seeding, as a roughened slope will STABILIZATION TIME FRAMES (EFFECTIVE AUG. 3, 2011)
� A TEMPORARY ACCESS BRIDGE IS A STREAM CROSSING MADE OF WOOD, METAL, OR OTHER MATERIALS DESIGNED TO LINiIT THE AMOUNT OF
provide some natural coverage for lime, fertilizer, and seed. The surface should not be
compacted or smooth. Fine seedbed preparation is not necessary for hydro seeding STTE AREA DESCRIPTION }' DISTURBANCE TO THE STREAM BANKS AND BED.
Z
operations: large clods, stones, and irregularities provide cavities in which seeds can lodge. O
STABILIZATIONEFFECTIVE USES &LIMITATIONS: TIMEFRAME EXCEPTIONS
Rate of wood fiber (cellulose) application should be at least 4,000 lb/acre.=erimeter dikes, swales, ditches, slopes 7 days None TEMPORARY ACCESS BRIDGES ARE THE PREFERRED METHOD OF WATERWAY CROSSING SINCE THEY TYPICALLY CAUSE THE LEAST DISTURBANCE TO
i-Agh quality water (HQW) zones 7 days None THE WATERWAY BED AND BANKS, AND CAN BE QUICKLY REMOVED AND REUSED.
Apply legume inoculants at four times the recommended rate when adding inoculant to a S„apes steeper than 3:1 7 days if slopes are 10' or
CONSTRUCTION SEQUENCE:
hydro seeder slurry. less in length and are
not steeper than 2:1, 1. REFER TO AUTHORIZED PERMITS FOR ADDITIONAL LOCAL, STATE, AND FEDERAL BMP REQUIREMENTS.
If a machinery breakdown of 1/2 to 2 hours occurs, add 50% more seed to the tank, based on
14 days are allowed
the proportion of the slurry remaining. This should compensate for damage to seed. Beyond LLI
2 hours, a full rate of new seed may be necessary. Stopes 3:1 or flatter 14 days 7 days for slopes 2. TIMBER EQUIPMENT MATS SHALL EXTEND A MINIMUM OF 10 FEET OUTSIDE OF THE STREAM BANKS.
crater than 50' in length 3. INSTALL TIMBER MATS IN WORK AREA AS NEEDED. POSITION A SERIES OF TIMBER MATS AS NEEDED TO CREATE A SAFE, FLAT WORK AREA. W
Lime is not normally applied with a hydraulic seeder because it is abrasive. It can be blown -1 other areas with slopes flatter than 4:1 14 days None, except for MATS SHALL BE POSITIONED TO BUTT UP AGAINST EACH OTHER.
onto steep slopes in dry form.rimeters and HOW zones T 0
4. EROSION CONTROL DEVICES SHALL BE INSTALLED ADJACENT TO TIMBER MATS.
MAINTENANCE TABLE 1: RIPARIAN SEED MIX 5. GEOTEXTILE FABRIC MAY WRAPPED OVER RUNNERS BENEATH THE MAT TO PREVENT ANY SOIL MATERIAL FROM FI' LLING INTO THE I®
Generally, a stand of vegetation cannot be determined to be fully established until soil cover
been maintained for one full year from planting. Inspect seeded areas for failure and -- - SSF SSF SSF WATERBODY.
has b Y p 9 P Species Common Name Percenta a of Mix J
make necessary repairs and reseedings within the same season, if possible. 6. SIDEBOARDS, CURBS OR FENDERS MAY BE INSTALLED ALONG THE OUTER SIDES OF THE DECK TO PROVIDE ADDITIONAL SAFETY AND TO (� 2 O
c-lymus Virginlcus _ Vir inia wild e 15 PREVENT SOIL MATERIAL FROM FALLING INTO THE WATERBODY �)
Reseeding --If a stand has inadequate cover, re-evaluate choice of plant materials and 'anicum virgatum _ Svritchc rass _ __ _ 15 PLAN (WORK AREA) Z W W Z
quantities of lime and fertilizer. Re-establish the stand after seedbed preparation or over- Agrostis sfolinifera _ Creeping bentgrass _ 10 7. PERIODIC INSPECTION SHOULD BE PERFORMED BY THE USER TO ENSURE THAT THE BRIDGE, STREAMBED, AND STRE-.M BANKS ARE MAINTAINED � �. z
seed the stand. Consider seedingtemporary, annuals species if the time of year is not AND NOT DAMAGED. Q
p ry, p y udbeckia hirta, NC ecotype _ Black-eyed Susan _ _ 10 EARTHEN RAMP
appropriate for permanent seeding. �oreopsis lanceolata Lance leaf tickseed 10 TtMBERMAT 8. MAINTENANCE SHOULD BE PERFORMED AS NEEDED TO ENSURE THAT THE STRUCTURE COMPLIES WITH ALL STANDF= 3S AND SPECIFICATIONS. Z
=anlcum ciandestinum Deer tongue 10 THIS SHOULD INCLUDE THE REMOVAL OF TRAPPED SEDIMENT AND DEBRIS WHICH SHOULD THEN BE DISPOSED OF Atl'3 STABILIZED OUTSIDE THE 0 W � W W
if vegetation fails to grow, soil must be tested to determine if acidity or nutrient imbalance is --
responsible. 4ndropogon gerardii_ Big bluestem 05 FLOODPLAIN.
:uncus eftusus Soft rush 05 lonaW
W
Fertilization --On the typical disturbed site, full establishment usually requires re -fertilization in _chinochloa muricata Awned barnyard grass 05
the second growing season. Fine turf requires annual maintenance fertilization. Use soil SchizachXdum scoto
pad m Little bluestem _ _ 05 _ Uj N
-- - -
tests if possible or follow the guidelines given for the specific seeding mixture. 5o hastrurn nutans Indian grass 05 Z
PROFILE N
Uj
ripsacum dactyloides Gamma qrass 05
100
provide quicker cover, the mix specified in Table 1 should also be augmented with the
ai propriate cover/companion species, as identified in Table 2.
L9.i
h
TABLE 2: COVER/COMPANION CROPS Lf) TYPICAL TEMPORARY BRIDGE DETAIL
N TC ENGINEERING LICENSE NO:
ecies
Common
Season
Mix
_-
___________Notes:
Weak competitor; does not
=stuca
Hard fescue
Fall, Winter
3-51bslacre;
interfere with native grasses.
r'vrpria20%
Shade tolerant.
: astuca ovina
Sheep
Fall, Winter
3-5 lbs/acre;
fescue
20%
_acalecereale
Ceareal or
Early Spring
30lbs/acre
Grows 3-4' tall, but not a strong a
Winter a
or Fall
corn etitor. _
_olium
perennial rye
Spring,
20-50%
Shorter rye; lasts about 2 years,
erenne
Summer
then dies out.
Foxtail or
pring,°
iSpring,—[
Good germination; dies off with
ataxia italica
German
Summer
20-50%
frost; does not tolerate mowing -
Millet
1356-13-004 PH. 19
ii
SCALE: DATE: