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Home My WebLink About20140737_CBL attributes and construction sequence for bypass pumping Catawba C203538 July 17 2015_20150727 Hood, Donna From:Beam, Patricia Sent:Monday, July 27, 2015 9:58 AM To:Hood, Donna Subject:FW: Catawba C203538 bypass pumping attributes Attachments:CBL attributes and construction sequence for bypass pumping Catawba C203538 July 17 2015.pdf Per your request… From: Schley, Anne B Sent: Monday, July 27, 2015 9:56 AM To: Beam, Patricia Subject: FW: Catawba C203538 bypass pumping attributes Trish, th Attached per your request is the information concerning bypass pumping for the 29 Ave. bridge. I was not sure if this had already been sent to you so I apologize if this is repeat information. Please let me know if you have any questions. Thanks, Anne From: BILLY TRIVETTE \[mailto:brtrivette@hotmail.com\] Sent: Friday, July 17, 2015 5:40 PM To: Gantt, Rodney W Cc: Schley, Anne B; Robinson, Lee E; Micheal Hepler Subject: Catawba C203538 bypass pumping attributes Rodney, upon conclusion of July 16, 2015's on site meeting with Division Environmental personnel and DENR personnel, a request was made to list the attributes of bypass pumping and some of the issues with constructing the concrete culvert as shown on the original contract plans. CBL has outlined some the attributes and issue in the attached letter and CBL has attached our proposed construction sequence for the concrete culvert. please pass this information along to Trish. call if you have questions thanks Thanks Billy Ray Trivette, Jr., P.E. 1 704-838-3381 Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties. 2 Country Boy Landscaping, Inc. Post Office Box 290 Harmony, North Carolina 28634 Telephone:704-924-9330 Fax:704-924-9332 July 14, 2015 Rodney Gantt, Resident Engineer NCDOT Division Twelve Post Office Box 47 Shelby, NC 28151 Contract: WBS : Federal Aid: County: Location: Mr. Gantt: C203538 42311.3.FD1 B-5150 Catawba Bridge #34 over Falling Creek on SR 1404 Country Boy Landscaping, Inc., hereafter CBL, appreciates the opportunity to identify the environmental benefits of the best management practice;- bypass pumping, for the construction of the concrete box culvert on the above referenced proj ect. The original contract plan sheet EC-7 depicts the original culvert construction sequence for phase III and phase IV. Phase III indicates the following activities, construction issues, and anticipated installation times: • Construct stilling basin; the basjn is located on the upstream end of all construction activities and all pumped effluent will flow from the stilling basin into the pre'viously disturbed areas of the stream channel; the dewatering of the culvert excavation, culvert invert, and culvert wall -. construction would occur over a 5 week period • Construct impervious dike D and temporary channel change with liner (9 ft. base, 4 ft. deep, 2:1 side slopes), diverting flow; o impervious dike D is approximately 170 linear feet long, the existing stream bed is approximately 3 feet of creek sand on top of bedrock with the presence of boulders, an impervious dike in these conditions is impossible to seal off, concrete barrier with sandbags and plastic will quickly undermine, steel sheering will have little to no embedment below the bottom elevation of the culvert excavation, the steel sheeting will not remain in place without embedment, the failure of the impervious dike would be an environmental issue o the construction of the temporary channel change is proposed in live stream conditions, the channel change is essentially a widening of the existing channel with no mechanism to control the stream flow while widening the channel, the outlet end of the temporary channel change is misaligned with the previously installed detour pipe, the water will exit the channel change and make a left hand turn and then a right hand turn to enter the detour pipes, the flow losses and resulting turbulence are not environmentally desirable o the temporary channel change could be constructed in the dry with the attempted installation of an additional 1701inear feet of impervious dike, the dike would likely fail and the installation and removal of the dike would require an additional4 days of live stream work - o the installation and removal of the impervious dike and temporary channel change would require approximately 7 days of live stream work Phase IV indicates the following activities, conshuction issues, and anticipated installation times: • construct impervious dikes E and F, diverting flow through barrels 1 and 2 of proposed culvert, impervious dikes would include the issues listed in phase III, the clean water from the south east quadrant of the project would enter the culvert excavation site, barrels 1 and 2 will have natural stream bed material installed in the invert prior to diverting the water to these barrels, the roof slab of the concrete culvert for barrels 1 and 2 will not be constructed until after this water is diverted, the workers will have no choice but to tromp around in the live stream on the recently placed natural stream bed material; the installation and removal of impervious dikes and the . tromping around in the live stream would require approximately 7 days of live stream work A narrative and graphical culvert construction sequ�nce are attached for reference. CBL's proposal to construct the concrete culvert by utilizing bypass pumping would require: • Installation and removal of approximately '�O linear feet of impervious dikes requiring 3 days of live stream work • The bypass pumping activity would continue for 8 to 10 weeks • The conversion of the skimmer basin to a stilling basin would move all dirty pumped effluent away from the culvert excavation and prevent the cleaned water from re-entering the excavation • The addition of a special stilling basin would allow additional water cleaning capacity of the pumped dirty effluent CBL's proposal to bypass pump will provide the Department and the environment with the absolute best management practice available. If you have questions, comments, or need more information, please contact me at 704-924-9330. Respectfully, Ch�is C. Cartne� Chris C. Cartner, Country Boy Landscaping, Inc. Culvert Construction Sequence PHASE I 1. Install all erosion control devices in accordance with NCDOT plans to prepare for the installation of the temporary detour pipe structures. 2. Substitute this sequence for the culvert constrµction sequence station.14+73.6 —L- shown on sheet:no. EC-7. 3. Install the Special Stilling Basin (Silt Bag) in accordance with Standazd 1630.06 4. Install clean water diversions along stations 14+00 to 15+50 right of—L- to direct surface runoff away from culvert excauation 5. Convert existing skimmer basin at station 16+25 left of detoar to puxnped effluent stilling basin with apptoximate starage of 115 cy 6. Install an Energy Dissiparion pad at the outIet of the Bypass Pumping Dischazge hose. Pad to be 6 feet by 12 feet by 1.5 feet thick, Class B rip rap, installed on Filter Fabric. Alternately, install any fabricated device that sufficiently dissipates the energy and velocity of the pumped watei to prevent scour, shear failure of vegetarion, and erosion of the outlet site 7. Install Impervious Dike at the inlet of the in-stream construction limits 8. Begin Bypass Pumping Operation 9. Install Impervious Dike at the inlet of the three each ten feet diameter pipes. Dike to be constructed of sandbags placed inside the pipes. Dike to be appxoximately two feet high �; 10. Install construction site dewatering pump and dischazge into the pumped effluent stilling basin, additionally as necessazy pump to Special Stilling Basin 11. Perform culvert excavation 12. Dispose of unsuitable material in accordance with Waste Reclamation Plan 13. Stockpile suitabie material on site and within the construction limits; encircle the lower side of the stock pile with temporary silt fence and provide an outlet with special sediment control fence in accordance with Standard 1606.01 14. Install foundation conditioning material 15. Install the culvert invert and wing wall fpundarions 16. Install culvert walls and wing walls 17. Place natural streambed material 18. Optionally install impervious dikes to divert stream flow to barrels one and two of the new concrete culvert and remove the by pass pumping operation and' by pass ., pumping impervious dikes. Otherwise continue by pass pumping operatian 19. Install culvert roof slab 20. Backfill culvert and install upstreatn and down stream cl�annel improvements as available 21. Remove the construclion site dewatering devices 22. Remove the outlet and inlet impervious dikes 23. Remove Bypass Pumping operati�n 24. Continue grading for the —L- alignment � Bypass Pumping Best Management Plan Catawba C203536 Concrete Culvert Installafion Plans Prepared by Billy Ray Trivette, Jr. P.E., NCDOT Erosion Conhol Certification Level II #730, Level III #3525 July 14, 2015 �r w � z-� m � � _r�-V` �� L_ ` � GJ �, �� -� ��. � _� � � � .� � �' �� = � � � � �' � � � .�. ��. -, .� rf � � �' � � �'�`J � :N ��. � ��r� � � �G� � �.►� � �? . : f�� i/ V � � ry \. ^ � v.1 z � F � a�� 4 � �� ! �G t6� W, iI R � � � � ti � �� ir' t� � � r` �� tl �. U, V4 C� I N_ -t � r� ` �, �: �1 � p u; =i �� , � L• � +';,,r 9c � � � r �� !1 � � � � � � � � r�' -- �� yt . � �� 8� 3��