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MA 1009-EM120119 19-Jan-2012 ENGINEER'S OPINION OF PROBABLE CONSTRUCTION COST 3:17:30 PM CPL11248 CITY OF COPPELL Summary of Estimated Cost of Design Options OPTION DESCRIPTION OF ITEM COST NO. OPTIONS CONSTRUCTED WITHOUT LOWERING WATER LEVEL _ 1 _SOIL NAIL WALL CONSTRUCTED FROM TEMPORARY ROCK BASE IN CANAL C $929,830 2 LARGE MODULAR BLOCK WALL $958,375 3 DRILLED SHAFT SUPPORTED WALL $1,173,480 4 SOIL NAIL WALL SET BACK FROM EXISTING WALL FOR WORKING ROOM $1,060,510 OPTIONS CONSTRUCTED WITH LOWERING WATER LEVEL 5 — SOIL NAIL WALL CONSTRUCTED NEAR EXISTING ALIGNMENT $743,380 6 — LARGE MODULAR BLOCK WALL $970,750 19-Jan-2012 ENGINEER'S OPINION OF PROBABLE CONSTRUCTION COST 3:17:30 PM Proj. No. CPL11248 CITY OF COPPELL OPTION 1: SOIL NAIL ITEM DESCRIPTION OF ITEM UNIT TOTAL UNIT COST NO. QUANTITY PRICE 1 Mobilization L.S. 1 $50,000 $50,000 2 Excavation for Wall Construction C.Y. 2500 $35 $87,500 3 Crushed Stone for Workspace Stabilization C.Y. 500 $50 $25,000 4 Shoring Existing Wall for Workspace (Sheet Piling) S.F. 4900 $30 $147,000 5 Soil Nail Wall S.F. 7700 $50 $385,000 6 Stone Veneer S.F. 6300 $10 $63,000 7 Grading of Slope Above Wall L.S. 1 $3,000 $3,000 8 Drainage Flume Connection Each 1 $3,000 $3,000 9 Storm Drain Conduit Connection Each 1 $3,000 $3,000 10 Remove Existing Wall L.F. 700 $35 $24,500 11 Remove Sheet Piling S.F. 6300 $7 $44,100 12 Excavation & Disposal of Embankment in Front of Wall C.Y. 1000 $50 $50,000 13 Sodding of Disturbed Areas S.Y. 1600 $5 $8,000 14 Cofferdam for Missing or unstable Wall Areas L.F. 100 $500 $50,000 ----------- ---- -------------- -- ---- 15 Pedestrian Rail L.F. 700 $30 $21,000 16 Easement Acquisition Prepared By: Sub-Total Const. Cost $964,100 Contingencies $96,410 TOTAL $1,060,510 19-Jan-2012 ENGINEER'S OPINION OF PROBABLE CONSTRUCTION COST 3:17:30 PM Proj. No. CPL11248 CITY OF COPPELL OPTION 2: TIED BACK DRILLED SHAFTS ITEM DESCRIPTION OF ITEM UNIT TOTAL UNIT COST NO. QUANTITY PRICE 1 Mobilization L.S. 1 $5.0,000 $50,000 2 Excavation for Wall Construction C.Y. 900 $35 $31,500 3 Crushed Stone for Workspace Stabilization C.Y. 500 $50 $25,000 4 30" Dia Drilled Shafts @ 25' Depth V.F. 2925 $100 $292,500 5 Tie-Backs Each 117 $1,000 $117,000 6 Lagging for Temporary Shoring S.F. 4900 $8 $39,200 7 Shoring Existing Wall for Workspace (Sheet Piling) S.F. 6300 $30 $189,000 7 Concrete Facing C.Y. 260 $450 $117,000 8 Stone Veneer S.F. 4900 $10 $49,000 9 Grading of Slope Above Wall L.S. 1 $3,000 $3,000 10 Drainage Flume Connection Each 1 $3,000 $3,000 11 Storm Drain Conduit Connection Each 1 $3,000 $3,000 12 Remove Existing Wall L.F. 700 $35 $24,500 13 Excavation & Disposal of Embankment in Front of Wall C.Y. 1000 $50 $50,000 14 Sodding of Disturbed Areas S.Y. 1600 $5 $8,000 15 Remove Sheet Piling S.F. 6300 $7 $44,100 16 Pedestrian Rail L.F. 700 $30 $21,000 Prepared By: Sub-Total Const. Cost $1,066,800 Contingencies $106,680 . TOTAL $1,173,480 19-Jan-2012 ENGINEER'S OPINION OF PROBABLE CONSTRUCTION COST 3:17:30 PM Proj. No. CPL11248 CITY OF COPPELL OPTION 3: LARGE MODULAR BLOCK WALL (REDI-ROCK ETC) ITEM DESCRIPTION OF ITEM UNIT TOTAL UNIT COST NO. QUANTITY PRICE 1 Mobilization L.S. 1 $50,000 $50,000 2 Excavation for Wall Construction C.Y. 2450 $35 $85,750 3 Crushed Stone for Wall Base C.Y. 320 $50 $16,000 4 Modular Block Wall S.F. 7350 $40 $294,000 5 Shoring Existing Wall for Workspace (Sheet Piling) S.F. 6300 $30 $189,000 6 Temporary Shoring for excavation of Backside of Wall S.F. 7000 $10 $70,000 7 Granular Backfill C.Y. 1100 $50 $55,000 8 Grading of Slope Above Wall L.S. 1 $5,000 $5,000 9 Drainage Flume Connection Each 1 $3,000 $3,000 10 Storm Drain Conduit Connection Each 1 $3,000 $3,000 11 Remove Existing Wall L.F. 700 _ $35 $24,500 12 Sodding of Disturbed Areas S.Y. 1480 $5 $7,400 13 Remove Sheet Piling S.F. 6300 $7 $44,100 14 Pedestrian Rail L.F. 700 $35 $24,500 Prepared By: Sub-Total Const. Cost $871,250 Contingencies $87,125 TOTAL $958,375 19-Jan-2012 ENGINEER'S OPINION OF PROBABLE CONSTRUCTION COST 3:17:30 PM Proj. No. CPL11248 CITY OF COPPELL OPTION 4: SOIL NAIL WALL IN APPROXIMATE ALIGNMENT OF EXISTING ITEM DESCRIPTION OF ITEM UNIT TOTAL UNIT COST NO. QUANTITY PRICE 1 Mobilization L.S. 1 $50,000 $50,000 2 Crushed Stone for Working Base C.Y. 4475 $60 $268,500 3 Soil Nail Wall S.F. 5830 $50 $291,500 4 Stone Veneer S.F. 4200 $10 $42,000 5 Grading of Slope Above Wall L.S. 1 $5,000 $5,000 6 Drainage Flume Connection Each 1 $3,000 $3,000 7 Storm Drain Conduit Connection Each 1 $3,000 $3,000 8 Remove Existing Wall L.F. 700 $35 $24,500 9 Remove Crushed Stone for working Base C.Y. 4000 $35 $140,000 10 Import Top Soil C.Y. 520 $20 $10,400 11 Sodding of Disturbed Areas S.Y. 1480 $5 $7,400 Prepared By: Sub-Total Const. Cost $845,300 Contingencies $84,530 TOTAL $929,830 19-Jan-2012 ENGINEER'S OPINION OF PROBABLE CONSTRUCTION COST 3:17:30 PM Proj. No. CPL11248 CITY OF COPPELL OPTION 5: SOIL NAIL WALL IN APPROXIMATE ALIGNMENT OF EXISTING, with Lowering of Water Level ITEM DESCRIPTION OF ITEM UNIT TOTAL UNIT COST NO. QUANTITY PRICE 1 Mobilization L.S. 1 $50,000 $50,000 2 Crushed Stone for Working Base C.Y. 2050 $60 $123,000 3 Lower and Maintain Water Level for Construction L.S. 1 $60,000 $60,000 4 Soil Nail Wall S.F. 5830 $50 $291,500 5 Stone Veneer S.F. 4200 $10 $42,000 6 Grading of Slope Above Wall L.S. 1 $5,000 $5,000 7 Drainage Flume Connection Each 1 $3,000 $3,000 8 Storm Drain Conduit Connection Each 1 $3,000 $3,000 9 Remove Existing Wall L.F. 700 $35 $24,500 10 _ Remove Crushe d Stone for working Base C.Y. 1600 $35 $56,000 11 Import Top Soil C.Y. 520 $20 $10,400 12 Sodding of Disturbed Areas S.Y. 1480 $5 $7,400 Prepared By: Sub-Total Const. Cost $675,800 Contingencies $67,580 TOTAL $743,380 19-Jan-2012 ENGINEER'S OPINION OF PROBABLE CONSTRUCTION COST 3:17:30 PM Proj. No. CPL11248 CITY OF COPPELL OPTION 6: LARGE MODULAR BLOCK WALL(REDI-ROCK ETC)WITH LOWERING OF WATER LEVEL ITEM DESCRIPTION OF ITEM UNIT TOTAL UNIT COST NO. QUANTITY PRICE 1 Mobilization L.S. 1 $50,000 $50,000 2 Excavation for Wall Construction C.Y. 2450 $35 $85,750 3 Temporary Shoring for excavation of Backside of Wall S.F. 7000 $10 $70,000 4 Crushed Stone for Wall Base C.Y. 320 $50 $16,000 5 Modular Block Wall S.F. 6300 $40 $252,000 6 Crushed Stone for Working Base C.Y. 2050 $60 $123,000 7 Lower and Maintain Water Level for Construction L.S. 1 $60,000 $60,000 8 Granular Backfill C.Y. 1100 $50 $55,000 9 Grading of Slope Above Wall L.S. 1 $5,000 $5,000 10 Drainage Flume Connection Each - _ 1 $3,000 $3,000 11 Storm Drain Conduit Connection Each 1 $3,000 $3,000 12 Remove Existing Wall L.F. 700 $35 $24,500 13 Remove Crushed Stone for working Base C.Y. 1600 $35 $56,000 14 Sodding of Disturbed Areas S.Y. 1650 $5 $8,250 15 Cofferdam for Missing or unstable Wall Areas L.F. 100 $500 $50,000 16 Pedestrian Rail L.F. 700 $30 $21,000 Prepared By: Sub-Total Const. Cost $882,500 Contingencies - $88,250 TOTAL $97Q750