20120776 Ver 3_Plans_20180302

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1Brownwood Rd.U.S. Hwy 421ECS REVISIONSSCALEENGINEERDRAFTINGPROJECT NO.SHEETDATECOVER SHEET USDA RAW WATER PROJECT
WATAUGA COUNTY, NORTH CAROLINA08-12474MEHDFAAS SHOWN10011-09-171 - (11-21-17)2 - REVIEW COMMENTS (12-18-17)OVER 28 YEARSOF EXCELLENCE
"SETTING THE STANDARD FOR SERVICE"
1812 CENTER PARK DR - SUITE D
NC REGISTERED ENGINEERING
[phone] [FAX]
[phone] [PHONE]
CHARLOTTE, NC 28217
FIRM # F-1078
ECS SOUTHEAST, LLPECS PROJECT NO. 08-12474SHEETCOVER SHEETTITLE10011/09/2017REVIEWED BY:DESIGNED BY:REVISION 1ISSUEDDATEDFADRAWN BY:USDA RAW WATER PROJECTMECHANICALLY STABILIZED EARTH WALLWATAUGA COUNTY, NORTH CAROLINAMEHMFP11/09/2017REVISION 2SITE VICINITY MAPNSEWDETAILS AND SPECIFICAITONS102SITE PLAN10111/09/201711/09/201711/21/201711/21/201711/21/2017DISCHARGE LOCATIONS 10312/18/201712/18/201712/18/201712/18/2017
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32+50ECS REVISIONSSCALEENGINEERDRAFTINGPROJECT NO.SHEETDATEPLAN AND PARAMETERS USDA RAW WATER PROJECT
WATAUGA COUNTY, NORTH CAROLINA08-12474MEHDFAAS SHOWN10111-09-171 - (11-21-17)2 - REVIEW COMMENTS (12-18-17)OVER 28 YEARSOF EXCELLENCE
"SETTING THE STANDARD FOR SERVICE"
1812 CENTER PARK DR - SUITE D
NC REGISTERED ENGINEERING
[phone] [FAX]
[phone] [PHONE]
CHARLOTTE, NC 28217
FIRM # F-1078
ECS SOUTHEAST, LLP NSEW200510SCALE: 1"=10'10NOTE: BASE DRAWING PROVIDED BY APPALACHIAN PROFESSIONAL LAND SURVEYORS & CONSULTANTS, P.A.TIE SAND BAG COFFER DAM TO EXISTING BANKADDITIONAL SAND BAGS MAY BE REQUIRED ATINTERFACE TO LIMIT WATER SEEPAGE AROUNDCOFFER DAMAPPROXIMATE
LOCAT
ION
OF
PROPOSED

INF
ILTRAT
ION
GALLERYSOUTH FORK RIVER
APPROXIMATE LIMITS OFTEMPORARY SAND BAGCOFFER DAMASHE COUNTYWATAUGA COUNTYA102B102C102APPROXIMATE LOCATIONOF PERMANENT EASEMENTTIE SAND BAG COFFER DAM TO EXISTINGBANK ADDITIONAL SAND BAGS MAY BEREQUIRED AT INTERFACE TO LIMITWATER SEEPAGE AROUND COFFER DAMSTABILIZED OUTFALL CLASS A STONEFILTER FABRICSEDIMENT BAG LOCATIONPUMP TO SED. BAGABOVE HIGH WATER2
NOTES1.STAGGER ALL VERTICAL JOINTS.2.PROVIDE GEOTEXTILE FABRIC BETWEEN ALL VERTICAL JOINTSPERPENDICULAR TO THE COFFER DAM ALIGNMENT TO EXTENT POSSIBLE.RIVER BOTTOM(ROCK)BASE BAGUPPER BAGSAPPROXIMATE LIMITSOF INFILTRATIONGALLERYSOUTH FORK RIVERNOTES1.STAGGER ALL VERTICAL JOINTS.2.PROVIDE GEOTEXTILE FABRIC BETWEEN ALL VERTICAL JOINTSPERPENDICULAR TO THE COFFER DAM ALIGNMENT TO EXTENT POSSIBLE.1' (MIN)5' (MAX)RIVER BOTTOM(ROCK)BASE BAGSUPPER BAGSNOTES1.STAGGER ALL VERTICAL JOINTS.2.PROVIDE GEOTEXTILE FABRIC BETWEEN ALL VERTICAL JOINTSPERPENDICULAR TO THE COFFER DAM ALIGNMENT TO EXTENT POSSIBLE.APPROXIMATE LIMITS OFINFILTRATION GALLERY1' (MIN)SOUTH FORK RIVERBASE BAGSMIDDLE BAGSNOTES1.STAGGER ALL VERTICAL JOINTS.2.UPPER BAGS NOT SHOWN OF CLARITY.3.PROVIDE GEOTEXTILE FABRIC BETWEEN ALL VERTICAL JOINTSPERPENDICULAR TO THE COFFER DAM ALIGNMENT TO EXTENT POSSIBLE.APPROXIMATE LIMITS OFINFILTRATION GALLERY1' (MIN)SOUTH FORK RIVERBASE BAGSMIDDLE BAGSAPPROXIMATE LIMITSOF INFILTRATIONGALLERYSOUTH FORK RIVERNOTES1.STAGGER ALL VERTICAL JOINTS.2.PROVIDE GEOTEXTILE FABRIC BETWEEN ALL VERTICAL JOINTSPERPENDICULAR TO THE COFFER DAM ALIGNMENT TO EXTENT POSSIBLE.1' (MIN)6' (MAX)RIVER BOTTOM(ROCK)MIDDLE BAGSBASE BAGSUPPER BAGSNOTES1.STAGGER ALL VERTICAL JOINTS.2.PROVIDE GEOTEXTILE FABRIC BETWEEN ALL VERTICAL JOINTSPERPENDICULAR TO THE COFFER DAM ALIGNMENT TO EXTENT POSSIBLE.RIVER BOTTOM(ROCK)MIDDLE BAGSBASE BAGUPPER BAGSECS REVISIONSSCALEENGINEERDRAFTINGPROJECT NO.SHEETDATEDETAILS AND
SPECIFICATIONS
USDA RAW WATER PROJECT
WATAUGA COUNTY, NORTH CAROLINA08-12474MEHDFAAS SHOWN10211-09-171 - (11-21-17)2 - REVIEW COMMENTS (12-18-17)OVER 28 YEARSOF EXCELLENCE
"SETTING THE STANDARD FOR SERVICE"
1812 CENTER PARK DR - SUITE D
NC REGISTERED ENGINEERING
[phone] [FAX]
[phone] [PHONE]
CHARLOTTE, NC 28217
FIRM # F-1078
ECS SOUTHEAST, LLP 1.0 GENERALA.RESPONSIBILITY FOR CONSTRUCTION COMPLIANCE1.CONTRACTOR SHALL CONTACT 811 A MINIMUM OF THREE (3) DAYS PRIORTO START OF WORK.2.THE CONTRACTOR SHALL PROVIDE ALL LABOR, EQUIPMENT, ANDMATERIALS TO CONSTRUCT THE PROJECT IN ACCORDANCE WITH THEREQUIREMENTS OF THESE PLANS AND SPECIFICATIONS OR ASDIRECTED BY THE ENGINEER. DURING THE COURSE OF THECONSTRUCTION ALTERNATIVES TO, OR CHANGES IN, THE PLANS ANDSPECIFICATIONS MUST BE APPROVED BY THE ENGINEER PRIOR TOCOMMENCEMENT OF WORK.3.APPROXIMATE FIELD LOCATION OF OTHER STRUCTURES IDENTIFIED TOTHE ENGINEER ARE SHOWN ON THESE DRAWINGS. THE ENGINEER ISNOT RESPONSIBLE FOR FIELD VERIFYING THESE LOCATIONS.4.WATER LEVELS SHOWN ARE BASED ON INFORMATION AVAILABLE AT THETIME OF DESIGN. IF THE ACTUAL WATER LEVELS ARE MORE THAN HALF AFOOT GREATER THAN THE WATER LEVELS SHOWN ON THE DRAWINGS,THE COFFERDAM CONTRACTOR SHALL IMMEDIATELY INFORM THEENGINEER OR HIS REPRESENTATIVE WHO WILL DETERMINE IFADDITIONAL COFFER DAM MODIFICATIONS ARE REQUIRED.5.THE CONTRACTOR SHALL FIELD VERIFY ALL CONDITION, GRADES ANDDIMENSIONS AT THE SITE PRIOR TO COFFER DAM CONSTRUCTION. IFTHE COFFER DAM CONTRACTOR DISCOVERS ANY ERRORS, OMISSIONSOR DISCREPANCIES, HE SHALL CONTACT THE ENGINEER PRIOR TOCONTINUING COFFER DAM CONSTRUCTION. THE ENGINEER WILL THENISSUE THE INSTRUCTIONS AS HOW TO PROCEED.6.THE CONTRACTOR IS SOLELY RESPONSIBLE FOR SITE SAFETY ANDUNDER NO CIRCUMSTANCES SHALL THE ENGINEER BE RESPONSIBLEFOR CONSTRUCTION SITE SAFETY.7.NO PERSONNEL SHALL BE ALLOWED IN COFFERDAM DURING A RAINEVENT THAT RAISES THE RIVER MORE THAN 6 INCHES OR SUBSEQUENTRIVER SURGE.8.CONTRACTOR MAY ANCHOR SAND BAGS TO BANK OR RIVER BED TOLIMIT DISPLACEMENT DURING STORM EVENTS.9.SAND BAGS SHALL BE STACKED IN A MANNER TO LIMIT CONTINUOUSHORIZONTAL JOINTS FROM THE EXTERIOR TO INTERIOR OF THESTRUCTURE.10.SMALLER SAND BAGS MAY BE USED TO LEVEL OUT UNEVEN GROUNDBELOW COFFER DAM SAND BAGS, AS NEEDED.11.CONTRACTOR SHALL NOTIFY ECS IF EXCESSIVE SEEPAGE IS OBSERVEDTHROUGH TEMPORARY COFFER DAM.12.THE CONTRACTOR SHALL INSTALL COFFERDAM SAND BAGS INACCORDANCE WITH DETAILS A THROUGH C. THE CONTRACTOR MAYADD AN ADDITIONAL ROW OF SAND BAGS PER DETAILS A-ALT THROUGHC-ALT, THIS SHEET, FOR RETAINED WATER DEPTHS OF MORE THAN 5FEET BUT LESS THAN 6 FEET.13.CONSTRUCTION EQUIPMENT MUST BE CLEANED BEFORE ENTERING THERIVER TO CONSTRUCT THE COFFERDAM.14.EROSION CONTROL MEASURE MUST BE IN PLACE ON THE RIVER BANKPRIOR TO CONSTRUCTING THE COFFER DAM. EROSION CONTROLMEASURES WHICH ARE REMOVED TO ALLOW ACCESS TO THE RIVERMUST BE REPLACED AT THE END OF EACH DAY.PLAN - TOP VIEW - MAX WATER HEIGHT 5'ASECTION - MAX WATER HEIGHT 5'NTSNTSELEVATION - MAX WATER HEIGHT 5'NTSBCB.DEWATERING AND SITE DRAINAGE1.THE CONTRACTOR SHALL PROVIDE SUMP PIT AND PUMPINGOPERATIONS AS REQUIRED FOR DEWATERING THE COFFERDAM AREAWHERE NEEDED.C.DESIGN CRITERIA1.CONSTRUCT COFFERDAM IN ACCORDANCE WITH THESE DRAWINGS.2.THE COFFERDAM HAS BEEN DESIGNED FOR FACTORS OF SAFETY FORTEMPORARY LOADING CONDITIONS OF 1.5 FOR DIRECT SLIDING.3.SOIL PARAMETERS USED IN THE DESIGN OF THE TEMPORARY COFFERDAM ARE BASED ON SOIL BORINGS AND LABORATORY TESTINGPERFORMED BY S&ME, INC. INCLUDED IN THE GEOTECHNICALENGINEERING REPORT TITLED "PROPOSED 24-INCH RAW WATER LINEBOONE, NORTH CAROLINA", DATED MAY 2, 2011.2.0 MATERIALS1.BAGS SHALL CONSIST OF 35 INCH SQUARE BAGS BY BAG CORP.2.BAG FILL MATERIAL SHALL HAVE A MINIMUM UNIT WEIGHT OF 100 PCF,WITH A FINES CONTENT OF LESS THAN 35%.3.GEOTEXTILES SHALL CONSIST OF MIRAFI 140N BY TENCATEGEOSYNTHETICS (TENCATE). ALL GEOTEXTILES SHALL BE IN STRICTACCORDANCE WITH THE LATEST SPECIFICATION FURNISHED BYTENCATE.4.ALL MATERIALS SHALL BE STORED IN ACCORDANCE WITHMANUFACTURERS RECOMMENDATIONS.3.0 SEQUENCE OF CONSTRUCTION FOR COFFER DAM DEWATERING1.INSTALL COFFER DAM.2.INSTALL SEDIMENT BAG DOWNSTREAM OF THE WORK AREA ABOVE THESTREAM BANK.3.THE CONTRACTOR WILL INSTALL THE DEWATERING PUMP AND THETEMPORARY PIPING THAT WILL CONVEY WATER FROM THE WORK AREATO THE SEDIMENT BAG.4.THE PUMP AND THE HOSE FOR THIS PURPOSE SHALL BE SELECTED BYTHE CONTRACTOR AND BE SUFFICIENT SIZE TO DEWATER THE WORKAREA. THE SILT SACK FOR DEWATERING PUMP SHALL BE A MINIMUM OF15' x 25' 8 OUNCE NON-WOVEN FABRIC CAPABLE OF FILTERING 8OZ./SQ.YD. AT 80 GPM/SQ.FT. MULTIPLE PUMPS AND SEDIMENT BAGSMAY BE USED IF REQUIRED. ONLY ONE PUMP DISCHARGE PER BAG ISALLOWED.5.ONCE THE SEDIMENT BAGS ARE FULL WITH SEDIMENT THEY SHALL NOLONGER BE USED. THE CONTRACTOR SHALL DISCONNECT THE OLDSEDIMENT BAG AND REPLACE WITH NEW. THE OLD BAG SHALL BE SETASIDE AND ALLOWED TO DRY. THEN REMOVED FROM THE WORK AREAAND PROPERLY DISPOSED OF ON AN AS NEEDED BASIS.6.THE CONTRACTOR WILL PERFORM INFILTRATION GALLERY INSTALLATIONWORK IN ACCORDANCE WITH THE PLAN AND FOLLOWING THE GENERALCONSTRUCTION SEQUENCE.7.THE CONTRACTOR WILL EXCAVATE ANY ACCUMULATED SILT ANDDEWATER BEFORE REMOVAL OF THE IMPERVIOUS DIKE. REMOVEIMPERVIOUS DIKES, PUMPS, AND TEMPORARY FLEXIBLE HOSE / PIPINGSTARTING AT THE DOWNSTREAM END OF THE DIKE FIRST.8.ONCE THE WORKING AREA IS COMPLETED, STABILIZE DISTURBED AREASWITH SEED, LIVE STAKES AND EROSION CONTROL MATTING INACCORDANCE WITH BANK STABILIZATION DETAILS.PLAN - TOP VIEW - MAX WATER HEIGHT 6'A-ALTSECTION - MAX WATER HEIGHT 6'NTSELEVATION - MAX WATER HEIGHT 6'NTSB-ALTC-ALTSEDIMENT BAG PROFILENTS1222
ECS REVISIONSSCALEENGINEERDRAFTINGPROJECT NO.SHEETDATEDISCHARGE LOCATIONS USDA RAW WATER PROJECT
WATAUGA COUNTY, NORTH CAROLINA08-12474MEHDFAAS SHOWN10312-18-17OF EXCELLENCE
"SETTING THE STANDARD FOR SERVICE"
1812 CENTER PARK DR - SUITE D
NC REGISTERED ENGINEERING
[phone] [FAX]
[phone] [PHONE]
CHARLOTTE, NC 28217
FIRM # F-1078
ECS SOUTHEAST, LLP NSEW4001020SCALE: 1"=20'20NOTE: BASE DRAWING PROVIDED BY WK DICKSON.ALTERNATE / SECONDARY DISCHARGE LOCATION(SEE SEDIMENT BAG DETAIL)ALTERNATE / SECONDARY DISCHARGE LOCATION(SEE SEDIMENT BAG DETAIL)PRIMARY DISCHARGE LOCATION(SEE SEDIMENT BAG DETAIL)