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HomeMy WebLinkAbout20200755 Ver 1_401 Application_20200609corblu ECOLOGY GROUP June 8, 2020 NC DWR, 401 & Buffer Permitting Branch 512 North Salisbury Street Raleigh, NC 27604 Subject: Section 401 Water Quality Pre -Construction Notification Colonial Pipeline Company Maintenance Johnston County, North Carolina Corblu Project No. 02-041901- Exposure Lines 23s and 24s To whom it may concern: On behalf of our client, Colonial Pipeline Company's (CPC), Corblu Ecology Group, LLC (Corblu) is pleased to submit this Section 401 water quality Pre -Construction Notification (PCN) for the required exposed pipeline preventative maintenance action within a perennial stream for CPC's Line 24s and Line 23s. The pipeline exposure is located within CPC's existing right-of-way (ROW) east of the Jack Road and Government Road intersection in Johnston County, North Carolina [(35.596078,-78.498691) and (35.596053,-78498706); Figure 1]. Based on our evaluation of the subject site, we believe that the temporary and permanent disturbances to waters of the U.S. associated with this maintenance activity are authorized by the U.S. Army Corps of Engineers (USACE) under a combination of Nationwide Permit (NWP) Nos. 3 (a) and (c) — Maintenance. This NWP does not require notification of the USACE prior to initiation of the preventative maintenance activity as there will be no loss of streambed; however, it has been determined that total temporary disturbance to the streambed exceeds 40 linear feet which requires 401 Water Quality Certification from the North Carolina Department of Environmental Quality (DEQ) prior to the initiation of work. Background Recent high flow events from significant precipitation have resulted in significant s bank erosion within an unnamed perennial stream In UHU's KUW, exposln. Line 24s (Photograph Nos. 1 and 2). The exposure and lack of surface pipe project location has resulted in conditions that leave the pipeline vulnerable 3225 South Cherokee Lane, Bldi, Section 401 Water Quality Pre -Construction Notification Colonial Pipeline Company — Line 24s Exposure June 8, 2020 Corblu Project No. 02-041901 —Johnston Co. NC Further, these conditions are not consistent with CPC's pipeline integrity program or U.S. Department of Transportation regulatory requirements for pipeline protection. Proposed Activities in Jurisdictional Waters The proposed pipeline maintenance activity will include permanent and temporary impacts to an unnamed perennial stream totaling 65 linear feet [approximately 52 linear feet (pre -cast revetment mats and rip rap), 3 feet of excavating and backfilling, and 10 linear feet (temporary dam and pump)], respectively. Specifically, CPC proposes to permanently place approximately 42 linear feet of pre -cast Submar matting, and 10 linear feet of rip rap (totaling 52 linear feet) in the unnamed stream which will provide the required protective cover over Line 23s and Line 24s. As mentioned above, temporary disturbances to the unnamed perennial stream will include approximately 10 linear feet of temporary workspace (dam and pump) to conduct maintenance activities "in -the -dry" and approximately 3 additional linear feet to "key" in the top of the matting system by temporarily excavating and backfilling the streambed. The proposed maintenance location will be accessed through CPC's existing, mowed, and maintained ROW from Government Road (Figure 3). CPC intends to inspect the exposed pipeline and replace the required protective cover over the pipeline as described above. To re-establish the protective cover CPC intends to conduct the following: 1) excavate the pipeline at the exposure on Line 23s and Line 24s; 2) inspect and make repairs to Line 23s and 24s as necessary; 3) backfill the excavation area; and 4) restore the stream to pre -erosional contours and elevations over Line 23s and Line 24s by returned excavated material and key pre -cast revetment mats into the stream bed and bank in a manner that maintains stream grade and flow conditions (Appendix A). To minimize sedimentation to the unnamed perennial stream during the above -mentioned maintenance activity, dams constructed of sand bags, steel plates, or water -inflatable plastic dams will be temporarily placed upstream of the maintenance area. The stream flow will be pumped around the maintenance area, discharging immediately downstream via an energy dissipater to prevent stream scour. The pump used will be sufficiently sized to accommodate the anticipated stream flow (Appendix B). The temporarily excavated soils will be stored within the adjacent upland area and returned to the excavated trench, and approximate pre-existing contours will be restored following completion of the maintenance activity Rip rap placed on an erosion control blanket (geotextile fabric) will be used to stabilize the Submar mats in the stream bed on the downstream side of the maintenance area where the finished top KI Section 401 Water Quality Pre -Construction Notification Colonial Pipeline Company — Line 24s Exposure June 8, 2020 Corblu Project No. 02-041901 —Johnston Co. NC elevation of the rip -rap does not exceed that of the original stream bed elevation. Once the required minimal protective pipeline cover (pre -cast revetment mats) are keyed into the streambed at existing grade, the temporary dams will be removed, and normal streamflow will be restored. CPC's standard erosion control practices will be employed (Appendix C). Specifically, the disturbed areas along the stream bank will be revegetated with a grass seed mix and stabilized with straw and silt fence. Corblu respectfully requests 401 Water Quality Certification for the required preventative pipeline maintenance and the unavoidable impacts to 65 linear feet of perennial stream (42 linear feet of Submar matting, 3 linear feet of excavating and backfilling to "key" in the mat, 10 linear feet of rip rap and 10 linear feet of temporary workspace) within CPC's existing, mowed, and maintained ROW (Appendix A). The appropriate figures and photographs are enclosed for your review. 401 & Buffer Permitting PCN Submittal Checklist We have provided the following information to document compliance with the requirements outlined in the PCN Submittal Checklist (Appendix D). Each item is discussed below. Application Fee A $240.00 check made out to "N.C. Division of Water Resources" for 401 Water Quality Certification with minor impacts has been included with this submittal. PCN Application A complete copy of the USACE Wilmington District PCN Application and supporting documentation have been included with this submittal (Appendix E). Stormwater Management Plan Not Applicable - This is a maintenance activity for an existing petroleum pipeline and does not involve the construction of any roads or structures. If your project is located within a State implemented Riparian Buffer Rule Area, submit the following along with site plans and PCN form: Three (3) copies of the details for on -site diffuse flow provisions Not Applicable. The proposed required maintenance activity is located within the Neuse River Basin, the rule does not apply as uses are existing and ongoing [15A NCAC 02B.0233 (3)(b)(i)] (Exemption when uses are present and ongoing). DWR Stream Determination Forms for streams on property and DWR determination letter for wetlands or streams (if applicable) K? Section 401 Water Quality Pre -Construction Notification Colonial Pipeline Company — Line 24s Exposure June 8, 2020 Corblu Project No. 02-041901 — Johnston Co. NC Not Applicable — The referenced forms are for buffer determinations. The proposed required maintenance activity is exempt (see above). Maps and Plans • The most recent version of the 1:24,000 USGS Topographic Map: See Figure 1. • The most recent version of the bound and published County NRCS Soil Survey Map - (required for projects within the Neuse River Basin, Tar -Pamlico River Basin, Randleman Lake Watershed and the Catawba River Basin, also recommended for all projects): See Figures 2A and 2B. • Vicinity map: See Figure 3. • The Site Plan: See Appendix A. • Pre-construction/Pre-existing conditions: See Appendix A. • Proposed conditions: See Appendix A. • Drainage Plans: Not Applicable. • Proposed Impacts: See Appendix A. • Wetland Impacts: Not Applicable. • Stream Impacts: See Appendix A. 4 Section 401 Water Quality Pre -Construction Notification Colonial Pipeline Company — Line 24s Exposure June 8, 2020 Corblu Project No. 02-041901 — Johnston Co. NC Summary and Conclusion In summary, the pipeline maintenance activity will result in unavoidable permanent and temporary impacts to approximately 65 linear feet (52 linear feet permanent and 13 linear feet temporary impacts) of the unnamed perennial stream as authorized under the USACE NWP Nos. 3(a) and (c). The project was designed to avoid and minimize stream impacts to the maximum extent practicable and represents the least environmentally damaging, practicable alternative that satisfies the project purpose. Based on this submittal, we respectfully request written authorization of Section 401 Water Quality Certification. If you have any questions or comments regarding this PCN submittal, please contact the undersigned at (770) 591-9990. Sincerely, CORBLU ECOLOGY GROUP, LLC 1 6 Trey YC.r:iickeft, CAE Staff Ecologist Shanna E. Cahill, CE Principal Enclosures: Figure 1 — Site Location Map Figure 2A — USDA NRCS Soils Map Figure 2B — USDA Soils Map Figure 3 — Vicinity Map Figure 4 — Jurisdictional Features Photographs (2) Appendix A: Detailed Site Plans Appendix B: Typical Dam and Pump Maintenance Dig Appendix C: CPC Soil Erosion and Sediment Control Plan Appendix D: 401 & Buffer Permitting PCN Submittal Checklist Appendix E: USACE Wilmington District PCN Form c: Ms. Jennifer Price, CPC Project Manager, via email Mr. John Wyatt, CPC Environmental Lead-SED, via email Mr. Faron Leigh, CPC Environmental Specialist, via email 5 l� Jack Road John �f Government Road r •� M j l f Base Map Source: USA Topo Maps Colonial Pipeline Company, SE Lines 23s and 24S Exposure Johnston County, North Carolina -%1 Line 23s Exposure Location (35.596078,-78.498691) Line 24s Exposure Location f .. - • (35.596053,-78498706) ft• is •. - �•`48 r ;C= • � t �• Legend CPC Pipeline S ( Exposures 1:12,000 corblu ECOLOGY GROUP 0 600 1,200 2,400 Feet Figure 1 Site Location Project No. 02-041901 h .. fikiw AX 7-0 Line 23S . '.• Exposure• Line 24s 4 .. 1..� Exposure Location Legend Exposures MUSYM Bb - Bibb sandy loam, 0 to 2 percent slopes, frequently flooded CaB - Cecil Loam, 2 to 6 percent slopes Perennial Streem Prject Are. f ,�4�,�• .. Base Map Source: ESRI Aerial Imagery 0 125 250 500 Feet GPS Data Collected: 3/31/2020 1 :2,500 Colonial Pipeline Company, SE CIA Figure 3 Lines 23s and 24s Exposure r'"Vicinity Map Johnston Count North Carolina o 1 b I u Project No. 02-041901 y' ECOLOGY GROUP Base Map Source: ESRI Aerial Imagery 0 50 100 200 Feet GPS Data Collected: 3/31/2020 1 :1'000 Colonial Pipeline Company, SE Lines 23s and 24s Exposure Johnston County, North Carolina orbl ECOLOGY GROJP Figure 4 Jurisdictional Features Project No. 02-041901 Section 401 Water Quality Pre -Construction Notification Photos taken on 3/31/2020 Colonial Pipeline Company — Line 23s and 24s Exposure Corblu Project No. 02-041901- Johnston Co. NC APPENDIX A DETAILED SITE PLANS 1 LMI\ COLONIAL PIPELINE / 16" 22 PIPELINE—'-,," COLONIAL PIPELIN JAL PURPOSES 8 23 PIPELINE 'HE GROUND ON FORM TO THE 3Y THE STATE :ERS AND ;IFIC AND BASED UTILITIES L PIPELINE HALL BE / / NN IS PROVIDED BY kL PURPOSES (O.H.W.M.) WAS / _ as / \ - T.O. P.=+230.10' PIPELINE COLONIAL PIPELINE PELINE 8" 24 PIPELINE RIGHT OF WAY EXPOSURE L=3.5' / :CTION CP2 T.O.P.=+230.23' / ELEVATION (Z) +243.95' COV.=24" / / +235.33' / +235.15' 78.49880' �j // // OR DEMOLITION, APPROVAL MUST ANAGER AND R THAN 1.5:1 XAMINED AND DER THE GRADING LLED BY TAINED ON THE %INTAINED DAILY I AS A RESULT CLEANING IS TO THE OWNER. I TRACTORS, 'LIERS THAT ;TORM DRAIN JCTION SITE IN PATED STORM JTANTS OFF THE )E BUT ARE NOT CAL SPILLS; -ANTS, GLUES, )D ESTOS FIBERS, TS; FUELS, OILS, rOR OR BATTERY IENT WASH !; CONCRETE, WASTES FROM &NING OR CHLORINATED RING ISPOSE OF SUCH 4TROLLED ILLY SEPARATED IOFF, WITH WITH LOCAL, )JECT AS S. ANY CHANGES ECT MANAGER, IENTED IN THE IDELINE RIGHT OF WAY :CTION 78.498800 COLONIAL PIPELINE 16" 22 PIPELINE-",,,. COLONIAL PIPELIN 8" 23 PIPELINE COLONIAL PIPELINE 8" 24 PIPELINE 233 CLES SHALL BE 'REE OF ERE SHOULD BE VY EQUIPMENT LD HAVE CONTROLS SHALL SEQUENT PROJECT AREA. :RIALS SHALL BE GNATED ING FOR ULTIMATE Y OF THE H APPROVED 2EAS. IF A RAIN 4CE SHALL BE SOIL AND THE KCESS OR JMPS OR OTHER EMOVED AND PER LOCAL, BREAM FLOW :ILITATE AP OR JERSEY .T LADEN WATER )IRECTLY OR ;TOCKPILE OR 4S SHALL BE THEIR :LUDING GRADE ATTEMPT TO NT CONTROL, PION LOGISTICS, RISE THAT EASURES TO lAN STREAM NSTALLATION. :NT AND RE THAT THE DANCE WITH THE PELINE RIGHT OF WAY :CTION 78.49880' SUBMAR MAT SYSTEM 8'x20' (7 TOTAL) BACKFILL EXCAVATED 3'-- DEEP TRENCH WITH EXISTING MATERIAL L+_ FLOW i 1 9C 0 / COLONIAL PIPELINE 16" 22 PIPELINE y w4WNFAW�,' MIN fal� ki / COLONIAL PIPELIN 8" 23 PIPELINE COLONIAL PIPELINE 8" 24 PIPELINE SEED & PLACE EROSION CONTROL BLANKET OVER ALL DISTURBED AREAS (2,301 FT2 TOTAL) M 3'DEEPx10'LONG ROCK SUBGRADE (12" DIA.) BANK PAVING (12" DIA.) BACKFILL EXCAVATED 2' DEEP TRENCH WITH EXISTING MATERIAL (TYP.) ...... ... _ SUBMAR MAT SYSTEM 8'x20' (7 TOTAL) BACKFILL EXCAVATED _ 3' DEEP TRENCH WITH EXISTING MATERIAL PROPOSED GRADE - -- COLONIAL PIPELINE ---- ---COLONIAL PIPELINE ...............-. 16" 22 PIPELINE 8" 23 PIPELINE i - f 20 IE WATER MARK 78.49880' MEMNEMM" i 0+00 3'DEEPx10'LONG ROCK SUBGRADE (12" DIA.) COLONIAL PIPELINE 8" 24 PIPELINE EXISTING GRADE 250 240 230 220 + 210 0+80 _INE ILL UT GH WATER MARK 78.49880° 230 ----- __ - -_-__ 230 -- - - �-- - - - - - - -- _ -- - _ - I PROPOSED COLONIAL PIPELINE GRADE 16" 22 PIPELINE 220 220 -30 -20 -10 0 10 20 30 1 C401 240--BACKFILL EXCAVATED 240 2' DEEP TRENCH WITH SUBMAR MAT SYSTEM EXISTING EXISTING MATERIAL 8'x2O' (7 TOTAL) GRADE L 230 230 PROPOSED GRADE COLONIAL PIPELINE 8" 23 PIPELINE 220 1 1 I i 220 -30 -20 -10 0 10 20 30 2 C401 240 230 220 + -30 BACKFILL EXCAVATED SUBMAR MAT SYSTEM EXISTING 3' DEEP TRENCH WITH 8'x20' (7 TOTAL) r GRADE EXISTING MATERIAL /( PROPOSED I GRADE I COLONIAL PIPELINE 8" 24 PIPELINE -20 -10 0 10 20 /--Z-\ 240 230 + 220 30 ACCESS PLAN SCALE: 1" = 250' PELINE RIGHT OF WAY :CTION 78.49880° i i COLONIAL PIPELINE 8" 24 PIPELINE COLONIAL PIPELINE 8" 23 PIPELINE COLONIAL PIPELINE 16" 22 PIPELINE /I INDIVIDUAL ELEMENT 3.75" -� �- 3.75" 2.25" UNDS (APPROX.) NOTE: C., 4,000 PSI 1. EXACT PLACEMENT OF MATS AND/OR ANCHORS IZED WILL BE DETERMINED IN THE FIELD. .R ROPE, 2. MATS ARE PLACED ON A GEOTEXTILE FABRIC 1 9,500 POUNDS AS SHOWN IN DETAIL. SUBMAR MAT SYSTEM SCALE: N.T.S. 3EOTEXTILE PLAN LAYOUT KALE: N.T.S. GEOTEXTILE UNDERNEATH SUBMAR MAT SYSTEM EXISTING GRADE IIIII III- ( PROPOSED GRADE BACKFILL EXCAVATED GEOTEXTILE UNDERNEATH 3' DEEP TRENCH WITH SUBMAR MAT SYSTEM TO BE COMPACTED MATERIAL PLACED 1' BEYOND MAT SYSTEM UPSTREAM ANCHOR TRENCH DETAIL SCALE: N.T.S. SUBMAR MAT COMPACTED MATERIAL SYSTEM PROPOSED GRADE GEOTEXTILE UNDERNEATH SUBMAR MAT SYSTEM TO BE PLACED 1' BEYOND MAT FLANK TRENCH DE SCALE: N.T.S. SUBMAR MAT SYSTEM ROCK TO BE PLACED AT LEAST 3 ELEMENTS IN AND EXISTING A MINIMUM OF 10' OUT r GRADE PROPOSED 3' GRADE I I GEOTEXTILE UNDERNEATH SUBMAR MAT SYSTEM ROCK SUBGRADE ROCK GRADE CONTROL DETAIL SCALE: N.T.S. 8' x 20' x S. WORM DRNE CONNECTORS 4.5" MATS MAT 1 MAT 2 SS. WORM DRIVE 8 I� CURRENT CONNECTORS 4' I FLOW XIL - MAT 1 ROPE TUCKED UNDER PLAN VIEW SIDE VIEW NOTE: 316 STAINLESS STEEL 2,200 LB. BREAKING STRENGTH IN THE LINE CONFIGURATION ABOVE. 5/16" NUT DRIVER NEEDED SEDIMENT SANDBAG DAM DISCHARGE PIPE NERGY DISSIPATOR (PUMPS SHOULD DISCHARGE ONTO A STABLE VELOCITY WORK AREA LENGTH NOT TO EXCEED THAT WHICH CAN BE DISSIPATOR MADE OF RIPRAP COMPLETED IN ONE DAY OR SANDBAGS) SANDBAG DAM CROSS SECTION DEWATERING DETAIL SCALE: N.T.S. oeaaaad<'pea'a�< S$°e� ° °aa°aeae °aaaea �do�°e$aepa0 STRAP e $��ae a awe � _ .'t . ., � •, ° 'G ,.`'t ` °>°e° FLOW$ °e$` •t, — ,FlLTER'BAG `' go a"a o$a'ea°$� V:• —�► •. 12" MIN. $� a _ aa� a aa��$aa�e�a PUMP DISCHARGE HOSE 12" MIN. PLAN VIEW MULCH, LEAF / WOOD COMPOST, STRAP WOODCHIPS, SAND OR STRAW BALES FLOW SLOPE ; 5% MAX. i • • e LLEVATION FILTER BAG L g" MIN. FILTER BAG CONSTRUCTION SPECIFICATIONS 1. TIGHTLY SEAL SLEEVE AROUND THE PUMP DISCHARGE HOSE WITH A STRAP OR SIMILAR DEVICE. 2. PLACE FILTER BAG ON SUITABLE BASE (E.G., MULCH, LEAF/WOOD COMPOST, WOOD CHIPS, SAND OR STRAW BALES) LOCATED ON A LEVEL OR 5% MAX. SLOPING SURFACE. DISCHARGE TO A STABILIZED AREA. EXTEND BASE A MIN. OF 12" FROM EDGES OF BAG. 3. CONTROL PUMPING RATE TO PREVENT EXCESSIVE PRESSURE WITHIN THE FILTER BAG IN ACCORDANCE WITH THE MANUFACTURING RECOMMENDATIONS. AS THE BAG FILLS WITH SEDIMENT, REDUCE PUMPING RATE. 4. REMOVE & PROPERLY DISPOSE OF FILTER BAG UPON COMPLETION OF PUMPING OPERATIONS OR AFTER BAG HAS REACHED CAPACITY, WHICHEVER OCCURS FIRST. SPREAD THE DEWATERED SEDIMENT FROM THE BAG IN AN APPROVED UPLAND AREA AND STABILIZE WITH SEED AND MULCH BY THE END OF THE WORK DAY, RESTORE THE SURFACE AREA BENEATH THE BAG TO ORIGINAL CONDITION UPON REMOVAL OF THE DEVICE. 5. USE NONWOVEN GEOTEXTILE WITH DOUBLE STITCHED SEAMS USING HIGH STRENGTH THREAD. SIZE SLEEVE TO ACCOMMODATE A MAX. 4" DIA. PUMP DISCHARGE HOSE. THE BAG MUST BE MANUFACTURED FROM A NONWOVEN GEOTEXTILE THAT MEETS OR EXCEEDS MIN. AVERAGE ROLL VALUES (MARV) FOR THE FOLLOWING: GRAB TENSILE 250 LB ASTM D-4632 PUNCTURE 150 LB ASTM D-4833 FLOW RATE 70 GAL/MIN/FT' ASTM D-4491 PERMITTIVITY (SEC—') 1.2 SEC, ASTM D-4491 UV RESISTANCE 70% STRENGTH ® 500 HOURS ASTM D-4355 APPARENT OPENING SIZE (ADS) 0.15 — 0.18 MM ASTM D-4751 SEAM STRENGTH 90% ASTM D-4632 6. REPLACE FILTER BAG IF BAG CLOGS OR HAS RIPS, TEARS OR PUNCTURES. DURING OPERATION KEEP CONNECTION BETWEEN PUMP HOSE AND FILTER BAG WATER TIGHT. REPLACE BEDDING IF IT BECOMES (It COI Alln FENCE F WOVEN SLIT FILM MIN. ABOV GEOTEXTILE UNDISTURE FLOW— GROUND EMBED GEOTEXTILE MIN. OF 8" VERTICALLY INTO THE GROUND. BACKFILL FENCE PC AND COMPACT THE SOIL ON A MIN. OE BOTH SIDES OF GEOTEXTILE THE C CROSS SECTION POSTS STEP 1 { STEP 2 A H STAPLE STAPLE STAPLE TWIST POST TOGETHER — STAPLE STEP 3 FINAL CONFIGURATION STAPLE --/ JOINING TWO ADJACENT SILT FENCE SECTIONS (TOP VIEW) SILT FENCE CONSTRUCTION SPECIFICATIONS 1. USE WOOD POSTS 1-3/4" x 1-3/4" t 1/16" (MINIMUM) SQUAT QUALITY HARDWOOD. AS AN ALTERNATIVE TO WOODEN POST USE SECTION STEEL POSTS WEIGHING NOT LESS THAN 1 POUND PER 2. USE 36" MINIMUM POSTS DRIVEN 16" MINIMUM INTO GROUND NO 3. USE WOVEN SLIT FILM GEOTEXTILE AS SPECIFIED IN SECTION H-1 FASTEN GEOTEXTILE SECURELY TO UPSLOPE SIDE OF FENCE POS' STAPLES AT TOP AND MID —SECTION. 4. PROVIDE MANUFACTURER CERTIFICATION TO THE AUTHORIZED REPF INSPECTION/ENFORCEMENT AUTHORITY SHOWING THAT THE GEOTEA REQUIREMENTS IN SECTION H-1 MATERIALS. 5. EMBED GEOTEXTILE A MINIMUM OF 8" VERTICALLY INTO THE GROL COMPACT THE SOIL ON BOTH SIDES OF FABRIC. 6. WHERE 2 SECTIONS OF GEOTEXTILE ADJOIN: OVERLAP, TWIST AND ACCORDANCE WITH THIS DETAIL. 7. EXTEND BOTH ENDS OF THE SILT FENCE A MINIMUM OF 5' HORI; DEGREES TO THE MAIN FENCE ALIGNMENT TO PREVENT RUNOFF F THE ENDS. 8. REMOVE ACCUMULATED SEDIMENT AND DEBRIS WHEN BULGES DEV OR WHEN SEDIMENT REACHES 25% OF FENCE HEIGHT. REPLACE UNDERMINING OCCURS, REINSTALL FENCE. SILT FENCE DETAIL SCALE: N.T.S. EXISTING GRADE RIPfZl' zi 1.5 TIME THE • i " 7L 1;mot GEOTEXTILE FABRIC SHALL BERIPRAP PLACEMENT eL. ;i; . • • UAL Ly MAX. SLOPE FOR 2' TOE TRENCH — MINIMUM TOE TRENCH DEPTH BELOW CHANNEL INVERT SHALL BE DESIGNED BASED ON SITE CHARACTERISTICS AND TO PREVENT FAILURE DUE TO SCOUR BANK PAVING DETAIL SCALE: N.T.S. OVERLAP ROLL EC 6" DEEP (MIN.) KEY I NTRENCH PREPARED SLOPE (SEEDBED) WITH SEED IN PLACE 6" MIN. OVERLAP AT ROLL END (TYP.) 1. USE TEMP. SOIL STABILIZATION MATTING MADE OF DEGRADABLE (LASTS 6 MOS. MIN.) NATURAL OR MAN—MADE FIBERS (MOSTLY ORGANIC). MAT MUST HAVE UNIFORM THICKNESS & DISTRIBUTION OF F THROUGHOUT & BE SMOLDER RESISTANT. CHEMICALS USED IN THE MAT MUST BE NON —LEACHING t NON —TOXIC TO VEGETATION & SEED GERMINATION & NON—INJUROUS TO THE SKIN. IF PRESENT, NE MUST BE EXTRUDED PLASTIC WITH A MAX MESH OPENING OF 2"x2" & SUFFICIENTLY BONDED OR S 2" CENTERS ALONG LONGITUDINAL AXIS OF THE MATERIAL TO PREVENT SEPARATION OF THE NET FF PARENT MATERIAL 2. SECURE MATTING USING STEEL STAPLES, WOOD STAKE OR BIODEGRADABLE EQUIVALENT. STAPLES MT "U" OR "T" SHAPED STEEL WIRE HAVING A MIN. GAUGE OF NO. 11 AND NO. 8 RESPECTIVELY "U" STAPLES MUST AVERAGE 1" TO 1-1/2" WIDE & BE A MIN. 6" LONG. "T" SHAPED STAPES MUST H, MIN. 8" MAIN LEG, A MIN. 1" SECONDARY LEG, & A MIN. 4" HEAD. WOOD STAKES MUST BE ROUGI HARDWOOD, 12" TO 24" IN LENGTH, 1" x 3" IN CROSS SECTION & WEDGE SHAPED AT THE BOTTOI 3. PERFORM FINAL GRADING, TOPSOIL APPLICATION, SEEDBED PREP. & PERMANENT SEEDING IN ACCOR WITH SPECS. PLACE MATTING WITHIN 48 HRS OF COMPLETING SEEDING OPERATIONS UNLESS END 0 WORKDAY STABILIZATION IS SPECIFIED ON THE APPROVED EROSION & SEDIMENT CONTROL PLAN. 4. UNROLL MATTING DOWN SLOPE. LAY MAT SMOOTHLY & FIRMLY UPON THE SEEDED SURFACE. AVOID STRETCHING THE MATTING. 5. OVERLAP OR ABUT ROLL EDGES PER MANUFACTURING RECOMMENDATIONS. OVERLAP ROLL ENDS BY (MIN.) WITH THE UPSLOPE MAT OVERLAPPING ON TOP OF THE DOWNSLOPE MAT. 6. KEY IN THE UPSLOPE END OF MAT 6" (MIN.) BY DIGGING A TRENCH, PLACING THE MATTING ROLL I THE TRENCH, STAPLING THE MAT IN PLACE, REPLACING THE EXCAVATED MATERIAL, & TAMPING TO EE THE MAT END IN THE KEY. 7. STAPLE/STAKE MAT IN A STAGGERED PATTERN ON 4' (MAX.) CENTERS THROUGHOUT & 2' (MAX.) C ALONG SEAMS, JOINTS & ROLL ENDS. 8. ESTABLISH & MAINTAIN VEGETATION SO THAT REQUIREMENTS FOR ADEQUATE VEGETATIVE ESTABLISHM CONTINUOUSLY MET IN ACCORDANCE WITH SECTION B-4 VEGETATIVE STABILIZATION. EROSION CONTROL BLANKET DETAIL SCALE: N.T.S. APPENDIX B TYPICAL DAM AND PUMP MAINTENANCE DIG 7�Plr SUMP W/INTAKE HOSE FILTER/SCREEN OR SUBMERSIBLE PUMP WATERBODY SPOIL CONTAINMENT BERM (SILT FENCE, HAY BALES OR OTHER APPLICABLE MATERIALS) FILTER BAG RETAIN A MIN. 25' VEGETATIVE BUFFER TO THE EXTENT POSSIBLE ENERGY DISSIPATOR/ SCOUR PROTECTION III III FLOW SPOIL II ,:III III �� II TROW ENGINEERING CONSULTANTS INC. 1w umrowu. mw.. swa zoo vu.0 U. ti. use o2w Tror nHon[: (a.) o -eui CAKE OA7E DRAWN APPROVED NM 01-29-2004 I171k1 MAINTAIN A MINIMUM 25' I VEGETATIVE BUFFER TO THE EXTENT POSSIBLE BACKHOE FOR STREAM EQUIPMENT CROSSINGS, SEE NOTE 14 SEE SHEET 2 FOR NOTES (I COLONIAL PIPELINE COMPANY ATLANTA, GEORGIA TYPICAL DAM AND PUMP MAINTENANCE DIG AT WATERBODY LESS THAN 15' TROW PROD. N0. DRAWING SHEET THES0050362 COL-0003 1 OF 2 DAM AND PUMP CROSSING THE FOLLOWING IS A SEQUENCE OF CONSTRUCTION AND MITIGATION MEASURES TO BE FOLLOWED AT ALL "DAM AND PUMP" TYPE CROSSINGS. SEQUENCE OF ACTMTIES STEP 1. IMPLEMENT THE TEMPORARY EROSION AND SEDIMENT CONTROLS. STEP 2. INSTALL DRY STREAM CROSSING MATERIALS. STEP 3. EXCAVATE TRENCH AND INSPECT OR REPLACE PIPE. STEP 4. BACKFILL AND RESTORE STREAM BANKS. STEP 5. REMOVE DAMS. STEP 6. IMPLEMENT PERMANENT EROSION AND SEDIMENTATION CONTROLS. 0611:4 SCHEDULE INSTREAM ACTIVITY FOR LOW FLOW PERIODS AND FOR THE APPROPRIATE TIMING WINDOW. 2. MARK OUT AND MAINTAIN LIMITS OF AUTHORIZED WORK AREAS WITH FENCING OR FLAGGING TAPE TO AVOID UNNECESSARY DISTURBANCE OF VEGETATION. ENSURE EQUIPMENT OPERATORS WORKING ON THE CROSSING HAVE BEEN BRIEFED ABOUT THIS PLAN AND THE MEASURES NEEDED TO PROTECT WATER QUALITY. INSTALL PRE —WORK SEDIMENT CONTROL MEASURES AS SPECIFIED IN THE PLAN. ALL NECESSARY EQUIPMENT AND MATERIALS TO BUILD THE DAMS AND TO PUMP WATER MUST BE ON SITE OR READILY AVAILABLE PRIOR TO COMMENCING IN —WATER CONSTRUCTION. 3. CONTRACTOR SHALL SUPPLY, INSTALL AND MAINTAIN SEDIMENT CONTROL STRUCTURES, AS DEPICTED AND ALONG DOWN GRADIENT SIDES OF WORK AREAS AND STAGING AREAS SUCH THAT NO HEAVILY SILT LADEN WATER ENTERS WATERBODY. a. NO HEAVILY SILT LADEN WATER SHALL BE DISCHARGED DIRECTLY OR INDIRECTLY INTO THE WATERBODY. b. EROSION AND SEDIMENT CONTROL STRUCTURE LOCATIONS AS DEPICTED ARE APPROXIMATE AND MAY BE ADJUSTED AS DIRECTED BY THE COMPANY INSPECTOR TO ACTUAL SITE CONDITIONS. c. SILT FENCE OR HAY BALE INSTALLATIONS SHALL INCLUDE REMOVABLE SECTIONS TO FACILITATE ACCESS DURING CONSTRUCTION. UTILIZE HAY BALE BARRIERS ONLY IN LIEU OF A SILT FENCE WHERE FREQUENT ACCESS IS REQUIRED. d. SEDIMENT LADEN WATER FROM TRENCH DEWATERING SHALL BE DISCHARGED TO A WELL VEGETATED UPLAND AREA, INTO A HAY BALE DEWATERING STRUCTURE OR GEOTEXTILE FILTER BAG. e. SEDIMENT CONTROL STRUCTURES MUST BE IN PLACE AT ALL TIMES ACROSS THE DISTURBED PORTIONS OF THE RIGHT—OF—WAY EXCEPT DURING EXCAVATION/INSTALLATION OF THE CROSSING PIPE. 4. TO THE EXTENT POSSIBLE, MAINTAIN A MINIMUM 25 FEET VEGETATIVE BUFFER STRIP BETWEEN DISTURBED AREAS AND THE WATERBODY. INSTALL AND MAINTAIN A SILT FENCE UPSLOPE OF THE BUFFER STRIP ON EACH SIDE OF THE WATERBODY. THE SILT FENCE SHOULD INCORPORATE REMOVABLE "GATES" AS REQUIRED TO ALLOW ACCESS WHILE MAINTAINING EASE OF REPLACEMENT FOR OVERNIGHT OR DURING PERIODS OF RAINFALL. 5. CONSTRUCT A TEMPORARY SUMP UPSTREAM OF THE DAM AND LINE WITH ROCKALL IF A NATURAL POOL DOES NOT EXIST. INSTALL THE PUMP OR PUMP INTAKE IN THE POOL OR SUMP. DISCHARGE WATER ONTO AN ENERGY DISSIPATOR DOWNSTREAM OF THE WORK AREA. 6, EXCAVATED MATERIAL MUST NOT BE STOCKPILED WITHIN 10 FT. OF THE WATERBODY. THIS MATERIAL MUST BE CONTAINED WITHIN BERM CONTAINMENT, WITH SECONDARY SILT FENCE PROTECTION TO PREVENT SATURATED SOIL FROM FLOWING BACK INTO THE WATERBODY. 7. CHEMICALS, FUELS, LUBRICATING OILS SHALL NOT BE STORED AND NOR SHALL EQUIPMENT BE REFUELED WITHIN 100 FT. OF THE WATERBODY. PUMPS ARE TO BE REFUELED AS PER THE SPCC PLANS. MAINTENANCE OF STREAMFLOW IF THERE IS ANY FLOW IN THE WATERBODY, INSTALL PUMPS TO MAINTAIN STREAMFLOW AROUND THE ISOLATED SECTIONS OF CHANNEL. THE PUMP IS TO HAVE 1.5 TO 2 TIMES THE PUMPING CAPACITY OF ANTICIPATED FLOW. A SECOND STANDBY PUMP OF EQUAL CAPACITY IS TO BE READILY AVAILABLE AT ALL TIMES. AN ENERGY DISSIPATOR IS TO BE BUILT TO ACCEPT PUMP DISCHARGE WITHOUT STREAMBED OR STREAMBANK EROSION. IF THE WORK IS PROLONGED BEYOND ONE DAY THE AREA NEEDS TO BE MONITORED OVERNIGHT. B. IF A REPLACEMENT, PIPE MAKE—UP AREAS ARE TO BE LOCATED AT LEAST 50 FT. FROM THE WATER'S EDGE (WHERE TOPOGRAPHIC CONDITIONS PERMIT) AND SHALL BE THE MINIMUM AREA NEEDED. 9. DAMS ARE TO BE MADE OF STEEL PLATE, INFLATABLE PLASTIC DAM, SAND BAGS, COBBLES, WELL GRADED COARSE GRAVEL FILL, OR ROCK FILL. DAMS MAY NEED KEYING INTO THE BANKS AND STREAMBED. ENSURE THAT THE DAM AND VEHICLE CROSSING IF NEEDED) ARE LOCATED FAR ENOUGH APART TO ALLOW FORA WIDE EXCAVATION. CAP FLUMES USED UNDER VEHICLE CROSSING DURING DRY CROSSING. 10. DEWATER AREA BETWEEN DAMS IF POSSIBLE. DEWATERING SHOULD OCCUR IN A STABLE VEGETATIVE AREA A MINIMUM OF 50 FT. FROM ANY WATERBODY. THE PUMP DISCHARGE SHOULD BE DISCHARGED ONTO A STABLE SPILL PAD, FILTER BAG OR HAY BALE STRUCTURE TO PREVENT LOCALIZED EROSION. THE DISCHARGE WATER SHOULD ALSO BE FORCED INTO SHEET FLOW IMMEDIATELY BEYOND THE SPILL PAD BY USING HAY BALES AND THE NATURAL TOPOGRAPHY. DISCHARGED WATER SHALL NOT BE ALLOWED TO FLOW INTO ANY WATERBODY OR WETLAND. IF IT IS NOT POSSIBLE TO DEWATER THE EXCAVATION DUE TO SOILS WITH A HIGH HYDRAULIC CONDUCTIVITY, THE EXCAVATION IS TO BE CARRIED OUT IN THE STANDING WATER. PUMP ANY DISPLACED WATER AS DESCRIBED ABOVE TO PREVENT OVERTOPPING OF DAMS. 11. INSPECT/REPAIR PIPELINE AS NEEDED. 12. CONTRACTOR SHALL RESTORE THE STREAM BED AND BANKS TO APPROXIMATE PRE —CONSTRUCTION CONTOURS, BUT NOT TO EXCEED 2:1 SLOPE. a. CONTRACTOR SHALL INSTALL PERMANENT EROSION AND SEDIMENT CONTROL STRUCTURES AS INDICATED ON A SITE SPECIFIC BASIS. IN THE ABSENCE OF SITE SPECIFIC INFOR— MATION, A FLEXIBLE CHANNEL LINER SUCH AS NAG C125 OR C350 WHICH IS CAPABLE OF WITHSTANDING ANTICIPATED FLOW SHALL BE INSTALLED. ALTERNATIVELY, ROCK RIP —RAP SHALL BE INSTALLED. b. ANY MATERIALS PLACED IN THE STREAM TO FACILITATE CONSTRUCTION SHALL BE REMOVED DURING RESTORATION. BANKS SHALL BE STABILIZED AND TEMPORARY SEDIMENT BARRIERS INSTALLED AS SOON AS POSSIBLE AFTER IN —STREAM WORK BUT WITHIN 24 HOURS OF COMPLETING IN —STREAM WORK. c. MAINTAIN A SILT FENCE OR HAY BALE BARRIER ALONG THE WATERBODY UNTIL VEGETATION IS ESTABLISHED IN ADJACENT DISTURBED AREAS. 13. WHEN THE STREAMBED HAS BEEN RESTORED, THE CREEK BANKS ARE TO BE CONTOURED TO A STABLE ANGLE AND PROTECTED WITH EROSION RESISTANT MATERIAL COMPATIBLE WITH FLOW VELOCITY BETWEEN DAMS (E.G., EROSION CONTROL BLANKETS, CRIBBING, ROCK RIP —RAP, ETC.). THE DAMS ARE TO BE REMOVED DOWNSTREAM FIRST. KEEP PUMP RUNNING UNTIL NORMAL FLOW IS RESUMED. COMPLETE BANK TRIMMING AND EROSION PROTECTION. IF SANDBAGS ARE USED FOR THE DAMS, PLACE AND REMOVE BY HAND TO AVOID EQUIPMENT BREAKING BAGS. 14. TEMPORARY EQUIPMENT CROSSING CAN BE CONSTRUCTED USING EITHER A FLUME CROSSING OR A TEMPORARY BRIDGE. FOR BRIDGE CROSSING DETAILS, REFER TO THE TYPICAL RAILCAR BRIDGE CROSSING OR TYPICAL MAT CROSSING DRAWINGS. TROW ENGINEERING CONSULTANTS INC. 1100 uflRJPIXRIN aLw., SURE 200 iN1MNSSEE. i1.. USA 32" vuoae (aso7 3es—sass REVISION DATE CAIE DATE DRAWN PPPROVED NTS 01-29-2004 ALS — D� COLONIAL PIPELINE COMPANY ATLANTA, GEORGIA TYPICAL DAM AND PUMP MAINTENANCE DIG AT WATERBODY LESS THAN 15' TROW PROD. NO.1 DRAWING SHEET THES0050362 I COL-00030 2 OF 2 APPENDIX C CPC SOIL EROSION AND SEDIMENT CONTROL PLAN Colonial Pipeline Company Soil Erosion and Sediment Control Plan For Pipeline Maintenance Activities Objective Disturbed areas are to be restored as close as practical to their original contours and conditions so that once vegetation is reestablished, erosion will be reduced to the same or lower level that existed prior to disturbance. Description This section defines the soil erosion and sediment control measures that Colonial Pipeline Company will implement during and after inspection and repairs of the pipeline are complete. The objectives of this plan are to establish general guidelines for controlling erosion and sedimentation and to specify criteria for sensitive or particularly susceptible soil areas. The plan incorporates measures to control erosion and sedimentation, including minimizing cover removal, limiting the time of exposure, limiting the flow of water onto the disturbed right-of-way, and filtering or settling out sediment from water flowing from the right-of-way. The primary objective of the soil erosion and sediment control plan is to reduce the area and duration of soil disturbance and reestablish permanent vegetation as soon after construction as possible, thereby minimizing long-term erosion and sedimentation. Some erosion is inevitable during construction; however, the plan includes measures to reduce erosion to the minimum practical. Colonial Pipeline Company plans to reduce soil erosion and provide sediment control during the repair of the pipeline at the project site by incorporating the following measures: • Water pumped from the construction area as part of the dewatering operation from the excavation will be filtered through silt filtration bags and discharged to a well -vegetated area. • All work will be confined within the existing right-of-way. Staked hay bales and silt fence will be installed around the worksite and maintained until vegetation is established. Proper controls will be added if necessary during construction. • All terms and conditions within Nationwide Permit 3 will be followed. • Erosion control measures will be installed prior to conducting any soil disturbing activities associated with the pipeline maintenance activity. • Clearing of vegetation will be kept to an absolute minimum and confined to the existing pipeline easement area. The easement area is 50 feet in width and devoid of large trees. The right of way is vegetated with undergrowth grasses and other short vegetation. • Vegetation will be reestablished within disturbed areas and along stream banks as soon as possible upon completion of work. Disturbed areas will be seeded with a wetland seed mixture • All erosion and sediment control measures will be inspected every two weeks at a minimum and after every significant rainfall event of 0.5 inch or more until disturbed areas have been stabilized. Identified damages to control measures must be repaired immediately. Refuse and Waste Disposal Colonial's representative will not allow the Contractor to discard any litter, including paper, bottles, cans, rags, sacks, welding rod stubs, fuel, crankcase draining, coating materials, equipment, and junk pipe in the ditch or along the right-of-way. All refuse must be collected and disposed in accordance with company specifications. Personnel will be instructed regarding the correct procedure for waste disposal. Maintenance/Inspection Procedures The following inspection and maintenance practices will be implemented to maintain erosion andsediment controls: i. All control measures will be inspected every two weeks at a minimum and following any storm event of 0.5 inch or greater. 2. All control measures will be maintained in good working order. If a repair is necessary, it will be initiated within 24 hours of the report. 3. Built-up sediment will be removed from silt fences when it has reached one-third the height ofthe fence. 4. Silt fences will be inspected for depth of sediment, tears, secure attachment of the fabric to the fence posts, and firm placement of the fence posts in the ground. 5. Temporary and permanent seeding and planting will be inspected for bare spots, washouts, and healthy growth. 6. Colonial Pipeline Company will select individuals to be responsible for inspections, maintenance and repair activities, and completion of the inspection and maintenance report. Personnel selected for inspection and maintenance responsibilities will receive training from Colonial Pipeline Company or its representative. Personnel must be trained in all practices necessary for maintaining the erosion and sediment controls used on -site. APPENDIX D 401 & BUFFER PERMITTING PCN SUBMITTAL CHECKLIST Version 1.4 January 9, 2009 401 & Buffer Permitting PCN Submittal Checklist ® The application fee (Checks may be made out to "N.C. Division of Water Resources" - $240.00 for 401 Water Quality Certification with minor impacts - $570.00 for 401 Water Quality Certification with major impacts - Express Review Fee (Amount requested on Acceptance Letter) ® Four (4) complete and collated copies of the PCN Application and supporting documentation (instead of providing 4 copies of the full size plans you may provide two copies of full size plans along with two copies of 11 X 17 plans) N/A Stormwater Management Plan (if applicable — see PCN Form Help File Section E) 1) Please provide three (3) copies of the stormwater management plans along with all supporting information pertaining to this project including the following: a. Entire site development/layout plans delineating all drainage areas; b. Design calculation sheets for all proposed BMP(s) sized for both on -site and off -site drainage; c. BMP supplements for each proposed BMP and Required Items Check List (http://portal.ncdenr.org/web/ir/bmp-manual) along with all required items; d. A Notarized Operation & Maintenance Agreement for each stormwater management facility; e. Detailed construction drawing sheets shall include (i) Erosion and sediment control plans; (ii) Installation and planting schedules for the proposed BMPs; (iii) Appropriately scaled plan views and cross sectional details of all BMPs and associated components — inlet and outlet structures, forebay, respective zones and pertinent elevations. N/A If your project is located within a State implemented Riparian Buffer Rule Area, submit the following along with site plans and PCN form: 1) Three (3) copies of the details for on -site diffuse flow provisions, (refer to http://portal.ncdenr.org/web/Ir/bmp-manual). N/A DWR Stream Determination Forms for streams on property and DWR determination letter for wetlands or streams (if applicable). The following is the most critical of all the information that you must provide. The quality and detail of the information will often determine the expeditiousness of the review. The following is a checklist of the types of pertinent information required at a minimum: Maps and Plans: ® The most recent version of the 1:24,000 USGS Topographic Map - Please cleanly draw or delineate the site boundaries on the topographic map. ® The most recent version of the bound and published County NRCS Soil Survey Map - (required for projects within the Neuse River Basin, Tar -Pamlico River Basin, Randleman Lake Watershed and the Catawba River Basin, also recommended for all projects) - Please clearly delineate the site boundaries, etc. on the map. If the delineation obscures any of the features, it is recommended that a clean copy be provided. Copies of the Version 1.4 January 9, 2009 current soil survey and/or soil survey map sheets can be obtained from the local NRCS County Office (http://www.nc.nres.usda.gov/). GIS soil layers are not acceptable. ® Vicinity map - Please clearly mark the location and approximate boundaries of the property and project on the map. Please indicate north arrow and scale. Please include applicable road names or State Road numbers. ® The Site Plan - The most critical map to be provided is the site plan. You must provide full sized plans. The following is the minimum list of plans that are typically needed. ® Pre-construction/Pre-existing conditions - This sheet (or sheets) must include: • All jurisdictional and non -jurisdictional wetland, stream, water features, State regulated buffers (delineated into Zones 1 and 2) • Topographic contours with elevations • Any existing structures and impervious areas • Existing utility lines and easements • Existing roads, culverts, and other pertinent features • North arrow and the scale (1":50' scale is recommended). ® Proposed conditions - This sheet (or sheets) must include: • All jurisdictional and non -jurisdictional wetland, stream, water features, State regulated buffers (delineated into Zones 1 and 2) • Lot layout (if a subdivision or commercial development is proposed) - lots must be developable without further impacts to jurisdictional and non -jurisdictional wetlands, streams, water features, and State regulated buffers. Building envelopes must be provided when streams, wetlands, riparian buffers, or water features exist on a lot • All built -out structures and impervious cover • Final grading contours with elevations • All utilities and easements (including septic fields on all lots within 100 feet of stream, wetland, or water features - if applicable) • Impacted areas — these should correspond with the Impact numbers listed on your PCN form. N/A Drainage Plans - Final drainage plans must include the following: • Locations and pertinent elevations and sizes of the stormwater collection system and drainage ways • All inlets and outlets must also be shown with pertinent elevations (All outlets to wetlands must be at a non -erosive velocity, generally less than 2 ft/sec during the peak flow from the 10-yr storm) • Scaled stormwater BMPs must also be indicated as required by DWR rules and policies • In certain cases (see Section E of PCN form), final stormwater management plans must also be provided (see Stormwater Management Plan Checklist) ® Proposed Impacts - All impacts to jurisdictional and non -jurisdictional wetland, stream, water features, and State regulated buffers must be shown and labeled on the site plans at a scale no smaller than 1" = 50'. All excavation, fill, flooding, stabilization, and other impacts that will be conducted in or near jurisdictional and non -jurisdictional wetland, stream, water features, and State regulated buffers must be indicated. Please provide cross sectional details showing the provisions for aquatic life passage (burial of culvert 20% for culverts s 48 inches, and 1-foot for culverts > 48 inches). Version 1.4 January 9, 2009 Wetland Impacts: N/A ❑ Precise grading and final elevation contours must be provided. Existing vegetation and any clearing must be specified. ❑ All subsurface utility lines must indicate the location of anti -seep collars. Construction detail for anti -seep collars must be provided. ❑ Roadway or other crossings of riparian wetlands may require floodway culverts to maintain existing hydrological conditions. ❑ Plans should show that the hydrology of remaining wetlands on the site will be maintained. Stream Impacts: ® Stream impacts must be clearly shown on the plans. The centerline as well as the banks of the stream must be surveyed or located by GPS for the portion of the stream to be impacted. N/A The inlet and the outlet of all culverts should be aligned with the stream as much as possible. Inlet and outlet elevations and streambed elevations should be indicated. Any inlet or outlet protection must be shown and enumerated on the impact map(s). N/A For bottomless culverts or other spans, a vertical cross section should be provided that shows the minimum distance from each span to each stream bank, the stream cross section, the height of the span above the stream and the minimum distance from the edge of each footer to each stream bank. Additionally, please provide a signed and sealed geotechnical report of subsurface soils at the proposed bottomless culvert location. The report must comply with the Division of Highways — Guidelines for Drainage Studies and Hydraulic Design, prepared by A.L. Hankins, Jr., State Hydraulics Engineer - 1999. N/A Multiple culverts or sectioned box culverts typically require the use of sills, off- setting or other means to match the cross section of the existing stream (in order to maintain stream stability and provide aquatic life passage). A vertical cross section of the culverts should be shown overlain with the up and downstream stream cross section including the stream flood -prone area. N/A Impacts associated with dam construction must indicate and enumerate all fill associated with the dam footprint, spillway and any bank stream bank stabilization. The length of stream impounded must also be indicated and enumerated. APPENDIX E USACE WILMINGTON DISTRICT PCN FORM o�npFryWjAAT f', O Office Use Only: Corps action ID no. DWQ project no. Form Version 1.3 Dec 10 2008 Pre -Construction Notification (PCN) Form A. Applicant Information 1. Processing 1 a. Type(s) of approval sought from the Corps: El Section 404 Permit El Section 10 Permit ®N/A 1b. Specify Nationwide Permit (NWP) number: 3 (a) & (c) or General Permit (GP) number: 1c. Has the NWP or GP number been verified by the Corps? ❑ Yes ® No 1 d. Type(s) of approval sought from the DWQ (check all that apply): ® 401 Water Quality Certification — Regular ❑ Non-404 Jurisdictional General Permit ❑ 401 Water Quality Certification — Express ❑ Riparian Buffer Authorization 1 e. Is this notification solely for the record because written approval is not required? For the record only for DWQ 401 Certification: ❑ Yes ® No For the record only for Corps Permit: ® Yes ❑ No 1f. Is payment into a mitigation bank or in -lieu fee program proposed for mitigation of impacts? If so, attach the acceptance letter from mitigation bank or in -lieu fee program. ❑ Yes ® No 1 g. Is the project located in any of NC's twenty coastal counties. If yes, answer 1 h below. ❑ Yes ® No 1 h. Is the project located within a NC DCM Area of Environmental Concern (AEC)? ❑ Yes ® No 2. Project Information 2a. Name of project: Colonial Pipeline Company Line 24s Exposure Johnston Co. NC 2020 2b. County: Johnston 2c. Nearest municipality / town: Clayton 2d. Subdivision name: N/A 2e. NCDOT only, T.I.P. or state project no: N/A 3. Owner Information 3a. Name(s) on Recorded Deed: Name on Easement Agreement: Thomas D. & Hazel H. Poole and Roy H. & Marjorie Y. Grimes; Please see PCN Form Attachment A — Easement Agreement. 3b. Deed Book and Page No. N/A 3c. Responsible Party (for LLC if applicable): N/A 3d. Street address: N/A 3e. City, state, zip: Clayton (Johnston County), North Carolina 27520 3f. Telephone no.: N/A 3g. Fax no.: N/A 3h. Email address: N/A Page 1 of 11 PCN Form — Version 1.3 December 10, 2008 Version 4. Applicant Information (if different from owner) 4a. Applicant is: ❑ Agent ® Other, specify: 4b. Name: John Wyatt 4c. Business name (if applicable): Colonial Pipeline Company (CPC) 4d. Street address: 5251 Hwy. 153 Suite C #365 4e. City, state, zip: Hixson, TN 37343 4f. Telephone no.: 770-819-3557 4g. Fax no.: 770-819-3567 4h. Email address: Jmwyatt@colpipe.com 5. Agent/Consultant Information (if applicable) 5a. Name: Trey Trickett 5b. Business name (if applicable): Corblu Ecology Group LLC. 5c. Street address: 3225 South Cherokee Lane, Bldg 800 5d. City, state, zip: Woodstock, Georgia 30188 5e. Telephone no.: 770-591-9990 5f. Fax no.: 770-591-9993 5g. Email address: Udckett@corblu.com Page 2 of 11 B. Project Information and Prior Project History 1. Property Identification 1a. Property identification no. (tax PIN or parcel ID): 7112 (Tax PIN) 1b. Site coordinates (in decimal degrees): Latitude: 35.596100 Longitude:-78.498800 (DD.DDDDDD) (-DD.DDDDDD) 1c. Property size: 0.201acre approximate project area 2. Surface Waters 2a. Name of nearest body of water (stream, river, etc.) to Swift Creek proposed project: 2b. Water Quality Classification of nearest receiving water: C;NSW 2c. River basin: map is available at Neuse hftp://h2o.enr.state.nc.us/admin/maps/ 3. Project Description 3a. Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this application: The work is to be conducted within CPC's existing mowed and maintained right-of-way (ROW). The stream has experienced significant erosion (incision) from past erosional events (i.e., heavy rainfall) which is the cause of the pipeline exposure. 3b. List the total estimated acreage of all existing wetlands on the property: N/A — No wetlands present within project area. 3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property: Approximately 68 linear feet of an unnamed perennial stream. 3d. Explain the purpose of the proposed project: Recent high flow events from significant precipitation and heavy rains have resulted in stream bed and bank erosion to the unnamed perennial stream within CPC's right-of-way (ROW), exposing CPC's Line 23s and Line 24s. CPC proposes to inspect the exposed line and replace the required protective cover over the pipeline using pre -cast revetment mats. 3e. Describe the overall project in detail, including the type of equipment to be used: CPC intends to inspect the exposed pipeline and replace the required protective cover over the pipeline through the use of pre -cast revetment mats. To re-establish the protective cover CPC intends to conduct the following: 1) excavate the exposure on Line 24s and Line 23s; 2) inspect and make repairs to Line 23s and Line 24s as necessary; 3) backfill the excavation area; and 4) restore the stream to approximate pre-hurricane/erosional contours and elevations using returned excavated material and revetment mats keyed into the stream bed and bank in a manner that maintains grade and stream flow conditions. To minimize sedimentation to the unnamed perennial stream during the above -mentioned maintenance activity, dams constructed of sand bags, steel plates, or water -inflatable plastic dams will be temporarily placed upstream of the maintenance area. The stream flow will be temporarily pumped around the maintenance area, discharging immediately downstream via an energy dissipater to prevent stream scour. The pump used will be sufficiently sized to accommodate the anticipated stream flow. The temporarily excavated soils will be stored within the adjacent upland areas and returned to the excavated trenches, and approximate pre -erosion contours will be restored following completion of the maintenance activity. It is our understanding once the required protective pipeline cover (pre -cast revetment mats) is keyed into the streambed in a manner that maintains existing grade and stream flow, the temporary dams will be removed, and normal streamflow restored. Rip rap used to below the matting system to stabilize the revetment mats within the stream bed will be placed so the finished top elevation of the rip rap does not exceed that of the original stream bed, and any rip rap utilized for bank stabilization will be placed on filter cloth as required. CPC's standard erosion control practices will be employed. Specifically, the disturbed areas along the stream bank will be revegetated with a grass seed mix and stabilized with straw and silt fence. Page 3 of 11 PCN Form — Version 1.3 December 10, 2008 Version 4. Jurisdictional Determinations 4a. Have jurisdictional wetland or stream determinations by the Corps or State been requested or obtained for this property / project (including all prior phases) in the past? Comments: ❑ Yes ❑ No ® Unknown 4b. If the Corps made the jurisdictional determination, what type of determination was made? ❑Preliminary❑Final 4c. If yes, who delineated the jurisdictional areas? Name (if known): Agency/Consultant Company: Other: 4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation. S. Project History 5a. Have permits or certifications been requested or obtained for this project (including all prior phases) in the past? ❑ Yes ® No ❑ Unknown 5b. If yes, explain in detail according to "help file" instructions. 6. Future Project Plans 6a. Is this a phased project? ❑ Yes ® No 6b. If yes, explain. Page 4 of 11 C. Proposed Impacts Inventory 1. Impacts Summary la. Which sections were completed below for your project (check all that apply): ❑ Wetlands ® Streams - tributaries ❑ Buffers ❑ Open Waters ❑ Pond Construction 2. Wetland Impacts If there are wetland impacts proposed on the site, then complete this question for each wetland area impacted. 2a. 2b. 2c. 2d. 2e. 2f. Wetland impact Type of jurisdiction number — Type of impact Type of wetland Forested (Corps - 404, 10 Area of impact Permanent (P) or (if known) DWQ — non-404, other) (acres) Temporary T W1 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ W2 ❑ P ❑ T ❑ Yes ❑ No ❑ Corps ❑ DWQ W3 ❑ P ❑ T ❑ Yes ❑ No ❑ Corps ❑ DWQ W4 ❑ P ❑ T ❑ Yes ❑ No ❑ Corps ❑ DWQ W5 ❑ P ❑ T ❑ Yes ❑ No ❑ Corps ❑ DWQ W6 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ 2g. Total wetland impacts 2h. Comments: 3. Stream Impacts If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this question for all stream sites impacted. 3a. 3b. 3c. 3d. 3e. 3f. 3g• Stream impact Type of impact Stream name Perennial Type of jurisdiction Average Impact number - (PER) or (Corps - 404, 10 stream length Permanent (P) or intermittent DWQ — non-404, width (linear Temporary (T) (INT)? other) (feet) feet) Submar matting Unnamed ® PER ® Corps S1 ®P ❑ T and rip rap bank Tributary to Dixon ❑ INT ❑ DWQ 4 feet 65 LF stabilization Branch Workspace (dam Unnamed ❑ PER ❑ Corps S2 ❑ P ❑ T and pump) and Tributary to Dixon El INT El DWQ excavation area Branch S3 ❑ P ❑ T ❑ PER ❑ Corps ❑ INT ❑ DWQ S4 ❑ P ❑ T ❑ PER ❑ Corps ❑ INT ❑ DWQ S5 ❑ P [-IT ❑ PER ❑ Corps ❑ INT ❑ DWQ S6 ❑ P ❑ T ❑ PER ❑ Corps ❑ INT ❑ DWQ 3h. Total stream and tributary Impacts 65 If 3i. Comments: Page 5 of 11 4. Open Water Impacts If there are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of the U.S. then indivi ually list all open water impacts below. 4a. 4b. 4c. 4d. 4e. Open water Name of waterbody impact number - (if applicable) Type of impact Waterbody type Area of impact (acres) Permanent (P) or Temporary T 01 ❑P❑T 02 ❑P❑T 03 ❑P❑T 04 ❑P❑T 4f. Total open water Impacts 4g. Comments: 5. Pond or Lake Construction If pond or lake construction proposed, then complete the chart below. 5a. 5b. 5c. 5d. 5e. Wetland Impacts (acres) Stream Impacts (feet) Upland Pond ID Proposed use or purpose (acres) number of pond Flooded Filled Excavated Flooded Filled Excavated Flooded P1 P2 5f. Total 5g. Comments: 5h. Is a dam high hazard permit required? ❑ Yes ❑ No If yes, permit ID no: 5i. Expected pond surface area (acres): 5j. Size of pond watershed (acres): 5k. Method of construction: 6. Buffer Impacts (for DWQ) If project will impact a protected riparian buffer, then complete the chart below. If yes, then individually list all buffer impacts below. If any impacts require mitigation, then you MUST fill out Section D of this form. 6a. ® Neuse ❑Tar -Pamlico El Other: Project is in which protected basin? ❑ Catawba ❑ Randleman 6b. 6c. 6d. 6e. 6f. 6g. Buffer impact number - Reason Buffer Zone 1 impact Zone 2 impact Permanent (P) or for Stream name mitigation (square feet) (square feet) Temporary T impact required. 131 ❑PFIT ❑Yes ❑ No B2 ❑P❑T ❑Yes ❑ No 133 ❑ P ❑ T ❑ Yes ❑ No 6h. Total buffer Impacts N/A N/A 6i. Comments: No riparian buffer protection rules, the pipeline maintenance is exempt under 15A NAC 02B .0243 (3)(a)(i). Page 6 of 11 D. Impact Justification and Mitigation 1. Avoidance and Minimization 1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project. Significant precipitation has resulted in stream bed and bank erosion in an unnamed perennial stream within CPC's ROW, exposing CPC's Line 23s and Line 24s. The exposure and lack of surface pipeline protection at this project location has resulted in conditions that may lead to potential damage to CPC's petroleum pipeline Line 23s and Line 24s. Further, these conditions are not consistent with CPC's or regulatory requirements for pipeline protection. Therefore, CPC is required to conduct the work for the safety of the pipeline (unavoidable work). b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques. CPC will only conduct work within their mowed and maintained ROW, thereby minimizing impacts to the greatest extent possible. 2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State 2a. Does the project require Compensatory Mitigation for impacts to Waters of the U.S. or Waters of the State? ❑ Yes ® No 2b. If yes, mitigation is required by (check all that apply): ❑ DWQ ❑ Corps 2c. If yes, which mitigation option will be used for this project? ❑ Mitigation bank El Payment to in -lieu fee program ❑ Permittee Responsible Mitigation 3. Complete If Using a Mitigation Bank 3a. Name of Mitigation Bank: 3b. Credits Purchased (attach receipt and letter) Type Quantity 3c. Comments: 4. Complete If Making a Payment to In -lieu Fee Program 4a. Approval letter from in -lieu fee program is attached. ❑ Yes 4b. Stream mitigation requested: linear feet 4c. If using stream mitigation, stream temperature: ❑ warm ❑ cool ❑cold 4d. Buffer mitigation requested (DWQ only): square feet 4e. Riparian wetland mitigation requested: acres 4f. Non -riparian wetland mitigation requested: acres 4g. Coastal (tidal) wetland mitigation requested: acres 4h. Comments: S. Complete if Using a Permittee Responsible Mitigation Plan 5a. If using a permittee responsible mitigation plan, provide a description of the proposed mitigation plan. Page 7 of 11 PCN Form — Version 1.3 December 10, 2008 Version 6. Buffer Mitigation (State Regulated Riparian Buffer Rules) — required by DWQ 6a. Will the project result in an impact within a protected riparian buffer that requires El Yes ® No buffer mitigation? If yes, you will have to fill out this entire form — please contact the State for more information. 6b. If yes, then identify the square feet of impact to each zone of the riparian buffer that requires mitigation. Calculate the amount of mitigation required. 6c. 6d. 6e. Zone Reason for impact Total impact Multiplier Required mitigation (square feet) (square feet) Zone 1 3 (2 for Catawba) Zone 2 1.5 6f. Total buffer mitigation required: 6g. If buffer mitigation is required, discuss what type of mitigation is proposed (e.g., payment to private mitigation bank, permittee responsible riparian buffer restoration, payment into an approved in -lieu fee fund). 6h. Comments: No riparian buffer protection rules, project is not located on the Catawba River mainstem nor mainstem lakes. Page 8 of 11 E. Stormwater Management and Diffuse Flow Plan (required by DWQ) 1. Diffuse Flow Plan 1 a. Does the project include or is it adjacent to protected riparian buffers identified ❑ Yes ® No within one of the NC Riparian Buffer Protection Rules? 1 b. If yes, then is a diffuse flow plan included? If no, explain why. ❑ Yes ®No Comments: 2. Stormwater Management Plan 2a. What is the overall percent imperviousness of this project? 0% 2b. Does this project require a Stormwater Management Plan? ❑ Yes ® No 2c. If this project DOES NOT require a Stormwater Management Plan, explain why: This is a maintenance activity for an existing petroleum pipeline and does not involved the construction of any roads or structures. 2d. If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan: ❑ Certified Local Government 2e. Who will be responsible for the review of the Stormwater Management Plan? ❑ DWQ Stormwater Program ❑ DWQ 401 Unit 3. Certified Local Government Stormwater Review 3a. In which local government's jurisdiction is this project? Johnston County ❑ Phase II 3b. Which of the following locally -implemented stormwater management programs ❑ NSW ❑ USMP apply (check all that apply): ❑ Water Supply Watershed ❑ Other: 3c. Has the approved Stormwater Management Plan with proof of approval been ❑ Yes ® No attached? 4. DWQ Stormwater Program Review ❑ Coastal counties ❑ HQW 4a. Which of the following state -implemented stormwater management programs apply ❑ ORW ❑ Session Law 2006-246 (check all that apply): ® Other: N/A- Pipeline Maintenance 4b. Has the approved Stormwater Management Plan with proof of approval been ❑ Yes ® No attached? 5. DWQ 401 Unit Stormwater Review 5a. Does the Stormwater Management Plan meet the appropriate requirements? ® Yes ❑ No 5b. Have all of the 401 Unit submittal requirements been met? ® Yes ❑ No Page 9 of 11 PCN Form — Version 1.3 December 10, 2008 Version F. Supplementary Information 1. Environmental Documentation (DWQ Requirement) 1 a. Does the project involve an expenditure of public (federal/state/local) funds or the ❑ Yes ® No use of public (federal/state) land? 1 b. If you answered "yes" to the above, does the project require preparation of an environmental document pursuant to the requirements of the National or State ❑ Yes ❑ No (North Carolina) Environmental Policy Act (NEPA/SEPA)? 1c. If you answered "yes" to the above, has the document review been finalized by the State Clearing House? (If so, attach a copy of the NEPA or SEPA final approval ❑Yes ❑ No letter.) Comments: 2. Violations (DWQ Requirement) 2a. Is the site in violation of DWQ Wetland Rules (15A NCAC 2H .0500), Isolated Wetland Rules (15A NCAC 2H .1300), DWQ Surface Water or Wetland Standards, ❑ Yes ® No or Riparian Buffer Rules (15A NCAC 2B .0200)? 2b. Is this an after -the -fact permit application? ❑ Yes ® No 2c. If you answered "yes" to one or both of the above questions, provide an explanation of the violation(s): 3. Cumulative Impacts (DWQ Requirement) 3a. Will this project (based on past and reasonably anticipated future impacts) result in ❑ Yes ® No additional development, which could impact nearby downstream water quality? 3b. If you answered "yes" to the above, submit a qualitative or quantitative cumulative impact analysis in accordance with the most recent DWQ policy. If you answered "no," provide a short narrative description. 4. Sewage Disposal (DWQ Requirement) 4a. Clearly detail the ultimate treatment methods and disposition (non -discharge or discharge) of wastewater generated from the proposed project, or available capacity of the subject facility. N/A — This pipeline maintenance project will not involve the generation of any wastewater necessitating a treatment method. Page 10 of 11 PCN Form — Version 1.3 December 10, 2008 Version 5. Endangered Species and Designated Critical Habitat (Corps Requirement) 5a. Will this project occur in or near an area with federally protected species or ❑ Yes ® No habitat? 5b. Have you checked with the USFWS concerning Endangered Species Act ® Yes ❑ No impacts? ❑ Raleigh 5c. If yes, indicate the USFWS Field Office you have contacted. ❑ Asheville 5d. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical Habitat? Potential species occurrences for Johnston County, North Carolina were reviewed from the USFWS ECOS website (https://ecos.fws.gov/ecp/) prior to visiting the site. Also an official IPaC species list was requested for the project area from the Asheville Field Office on 4/15/2020. Please see PCN Form Attachment B - IPaC Report. 6. Essential Fish Habitat (Corps Requirement) 6a. Will this project occur in or near an area designated as essential fish habitat? ❑ Yes ® No 6b. What data sources did you use to determine whether your site would impact Essential Fish Habitat? https://www.fisheries.noaa.gov/resource/map/essential-fish-habitat-mapper 7. Historic or Prehistoric Cultural Resources (Corps Requirement) 7a. Will this project occur in or near an area that the state, federal or tribal governments have designated as having historic or cultural preservation ❑ Yes ® No status (e.g., National Historic Trust designation or properties significant in North Carolina history and archaeology)? 7b. What data sources did you use to determine whether your site would impact historic or archeological resources? Site data collected. Please see PCN Form Attachment C - NRHP Map. 8. Flood Zone Designation (Corps Requirement) 8a. Will this project occur in a FEMA-designated 100-year floodplain? ❑ Yes ® No 8b. If yes, explain how project meets FEMA requirements: 8c. What source(s) did you use to make the floodplain determination? Trey Trickett 6/4/2020 Date Applicant/Agent's Signature Applicant/Agent's Printed Name (Agent's signature is valid only if an authorization letter from the applicant is provided.) Page 11 of 11 Base Map Source: ESRI Aerial Imagery 1:24,000 0 1,200 2,400 4,800 Feet Colonial Pipeline Company, SE .1 Lines 23s and 24s Exposure � o r � I V FEMA/FIRM Map Johnston County, North Carolina Project No. 02-041901 ECOLOGY GROUP Base Map Source: ESRI Aerial Imagery 1:24,000 0 1,200 2,400 4,800 Feet Colonial Pipeline Company, SE Lines 23s and 24s Exposure O r I V NC HPO and NRHP Map Johnston County, North Carolina Project No. 02-041901 ECOLOGY GROUP