Final Estimates Level 2. Module 5: Earthwork Computations

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1 Florida Department of TRANSPORTATION Final Estimates Level 2 Module 5: Earthwork Computations 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

2 Module Content Basic Earthwork Terminology Pay item Descriptions Earthwork Requirements Earthwork Records Earthwork Records Processing Earthwork Calculations Example 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

3 Basic Earthwork Terminology Bench Mark Temporary Bench Mark Baseline Terrain Template Cross Section Limits End Area Shoaling 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

4 Basic Earthwork Terminology Plan Bench Mark (BM) A vertical reference point depicted on the original plans A Bench Run is a set of levels to check the accuracy of the plan bench mark elevations Without a Bench Mark Run, quantity disputes could be questionable 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 4 Survey data used to generate quantities must tie to a Plan Bench Mark or the data is questionable and unverifiable. A Bench Run should be done even if the survey is waived to ensure bench mark elevations shown in the plans are accurate. A bench run checks the levels from the first to the last bench mark on the project, turning through all existing bench marks, without adjusting H.I. s or correcting up for any differences at individual benches. All checks need to close within third order accuracy. Third Order Accuracy requires the closure to be within: 0.05 Distance in Miles Reference Construction Project Administration Manual (CPAM) 5.16 for additional information. 5-4

5 Basic Earthwork Terminology Temporary Bench Mark (TBM) A vertical reference point used temporarily in addition to a Plan Bench Mark TBMs must tie to known reference point (i.e., Plan Bench Marks) 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 5 Provide a reference to the Field Book and page where the TBM was originally established. A temporary bench mark is set in something out of the construction path, is stable and will not move, such as a nail in a tree. Temporary Bench Marks (T.B.M.) should be set only after the project check levels have been completed. Check levels shall be accomplished by running a complete level circuit beginning at one of the project bench marks, to the T.B.M. and back to the project bench marks or to another established project bench mark. Third order accuracy is required. 5-5

6 Basic Earthwork Terminology Baseline The vertical line on a cross section where measurements begin Baseline Survey Centerline Construction 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 6 Left of Baseline Negative (-) Right of Baseline Positive (+) Know the Earthwork Baselines of the Project Note: Baseline (BL) Survey and Centerline (CL) Construction may or may not be the same. 5-6

7 Basic Earthwork Terminology Terrain A line which depicts the original ground before construction. There are two types: Plan Terrain Pre Construction Terrain Plan Terrain 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 7 The Project Administrator will determine by inspection which terrain is correct. Any adjustments to plan quantity items will be made in accordance with FDOT Standard Specifications Field measured items will be paid according to installed quantity. The Pre-Construction Terrain Line is used when the Department or the Contractor have determined that the Plan Terrain line is different from the Pre-Construction Terrain Line. If a deviation exists between the Plan Terrain Line and the Pre- Construction Survey Terrain Line, the latter will replace the Plan Terrain Line at the cross section stations. The contractor should be notified and should concur with the change to pre-construction terrain through a pre-construction survey letter. Refer to CPAM 5.16 for an example. Cross sections to verify the Plan Terrain Line, when required, must be taken before the clearing and grubbing operation to adequately address existing terrain conditions at full station locations shown in the plans. 5-7

8 Basic Earthwork Terminology Template A line which specifies to the Contractor how to construct the earthwork at a station Template may be above or below the terrain 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 8 Excavation = Template below Terrain Embankment = Template above Terrain 5-8

9 Basic Earthwork Terminology Cross Section A view of the project cut at a particular station to show the details at that location 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 9 Cross sections show both the surveyed terrain and the template at one location. This helps visual the earthwork needed and calculate quantities. 5-9

10 Basic Earthwork Terminology Limits Defined boundary for earthwork placement and/or payment 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

11 Basic Earthwork Terminology End Area The cross sectional area of a shape (the area of the end of the shape) 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

12 Basic Earthwork Terminology Shoaling Shoaling is a shallow or less deep area of a channel due to material carried by the waters action. 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 12 Subarticle of the Specifications: Contractor shall maintain the channel section from shoaling or other encroachment until final acceptance of the project. 5-12

13 Pay Item Descriptions Plan Quantity Items Regular Excavation (120 1 and ) Lateral Ditch Excavation (120 3) Embankment (120 6) Final Measure Items Borrow Excavation (120 2) Subsoil Excavation (120 4) Channel Excavation (120 5) 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 13 There are pay items to account for the different areas of cut and fill needed on a projects. 5-13

14 Pay Item Descriptions Regular Excavation Excavation and utilization or disposal of material necessary for construction of the roadway, ditches, ponds, etc. 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

15 Pay Item Descriptions Regular Excavation Cut material below natural ground to the finished grading template 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

16 Pay Item Descriptions Subsoil Excavation Excavation and disposal of unsuitable existing material below the finished grading template Subsoil excavation under the roadway must be backfilled with a suitable material 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

17 Pay Item Descriptions Subsoil Excavation Cut material from the finished grading template or original ground, whichever is lower, to the lower limits of removal of organic or plastic material 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 17 Any suitable material required to be removed to access the unsuitable material will be included in the subsoil quantity. 5-17

18 Pay Item Descriptions Embankment Earthwork material needed to construct the roadway This item is used when fill is necessary and cross sections are available Borrow Excavation Earthwork material furnished by the Contractor This item is used when fill is necessary and cross sections are limited or unavailable 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 18 Usually when a truck measured borrow pay item is used on a project, there will not be an embankment pay item. Verify in the contract. These items will include the quantity of fill required for all subsoil excavation. 5-18

19 Pay Item Descriptions Material used in the stabilized subgrade Embankment Fill material placed above natural ground terrain Backfill of authorized subsoil excavation 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 19 If the Engineer of Record (EOR) included estimated subsoil in plan quantity, then the estimated quantity must be subtracted and the actual quantity added to the embankment quantity. This quantity could also be subtracted from the embankment total. Borrow is typically used on projects with minimal earthwork, but this diagram and terms apply to borrow as well. 5-19

20 Pay Item Descriptions Lateral Ditch Excavation Excavation of inlets and outlet ditches to structures and roadway Changes in channels of streams and ditches parallel to the roadway right of way Channel Excavation Removal and disposal of material from the limits of a channel in accordance with the Plans 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 20 If quantities are not significant, ditch and channel excavation may be included in the regular excavation pay item. 5-20

21 Earthwork Requirements Required Survey Original Check Sections Final Check Sections Field Checks Error in Quantity Earthwork Survey/Cross Section Waiver (Form ) Waiver Process Projects to Waive Survey CPAM 5.16 Ensure procedures are followed 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 21 The CPAM Section 5.16 discusses earthwork notes, and documentation of survey data and field records. As an exception, Contractor s survey notes may be used if obtained by a joint survey under the responsible charge by the Department or its representative. 5-21

22 Earthwork Requirements The Project Administrator is required to verify the project s plan terrain and final surfaces for compliance with the plan dimensions. This is done by: Survey or An alternate method approved by the DFEM or DCE Unless the DFEM/DCE waives this requirement via the Earthwork Survey/Cross Section Waiver 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 22 Alternate method approved by the DFEM or DCE, such as Radial Survey and Global Positioning System (GPS). The PA will submit written notification of the findings to the Contractor for concurrence. If the Contractor wishes to dispute the Department s survey, he/she must obtain their own survey of the disputed area, certified by a Professional Land Surveyor, at no expense to the Department, before clearing & grubbing. If cross sections show a significant difference as defined in Standard Specifications Subarticle , quantity adjustments will be considered. 5-22

23 Final Estimates Level 2 Earthwork Requirements The same baseline and stationing should be used for both original and final cross sections Maximum intervals of cross sections: Flat terrain: 100 ft. Rolling terrain: 50 ft. or closer (where conditions warrant) 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 23 When cross sectioning, care must be taken where match lines are required to ensure proper stationing on each baseline is established and proper ties are made. For subsoil, a maximum of 50 for flat terrain, and it is recommended 25 for curves 5-23

24 Earthwork Requirements All breaks in the terrain must be reflected in the survey notes Describe the type of break in the survey notes Stations at which cut or fill begin must be identified in the notes 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 24 Examples of terrain breaks; edge of pavement, edge of shoulder, ditch bottom, top of slope, toe of slope, ROW line, etc. 5-24

25 Final Estimates Level 2 Earthwork Requirements Original Check Sections When required, must be taken before original ground is disturbed Unnecessary before subsoil excavation if preconstruction check sections are waived 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 25 The Project Administrator must request a waiver if they determine there has been no change to the plan terrain. Interval of cross sections depends on field conditions. 5-25

26 Earthwork Requirements Final Check Stations When required, final check sections should be taken immediately after final grading of a completed area Unnecessary if final grading inspection is adequately documented 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

27 Earthwork Requirements Field Checks If full survey is not required, spot survey is taken as soon as a section of a project is completed Slope or slope stake verification shall be taken at intervals or in areas deemed necessary by the DFEM/DCE Note: If field checks are out of compliance, further survey may be necessary to support deductions. 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 27 Survey data collected to support deductions should be entered into the FDOT s Multiline Earthwork program or other method approved by the DFEM. Electronic earthwork files (such as Multiline) are submitted with the final estimate package to the Department. These electronic files are also sent to the Contractor. 5-27

28 Earthwork Requirements Quantity Error Cross sections shall be required if the Department or the Contractor contends that there is an error in quantity If so, then survey according to the usual FDOT methods to resolve the questions 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 28 Survey must be done prior to the contractor disturbing the existing ground. The claimant shall support any differences through appropriate verifiable level notes. If the Contractor wants to dispute, he/she must acquire their own survey at no expense to the Department. (Refer to CPAM ) 5-28

29 Note: Need to attach letter of agreement from Contractor. 5-29

30 Earthwork Requirements Earthwork Survey / Cross Sections Waiver Process: PA submits the Waiver for approval by the DCE or DFEM Consideration is given to: type of work, monetary exposure, possible claims, contract permits Once approved, PA submits written notification to the Contractor Contractor must agree in writing 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 30 Consideration must be given to Contract permits (such as the U.S. Army Corp of Engineers, Water Management Districts, etc.). 5-30

31 Earthwork Requirements Earthwork Survey/Cross Section Waiver Types of projects where check surveys might be waived: 1. Milling and resurfacing projects where shoulder elevation does not change 2. Projects that involve only earthwork around box culvert extensions 3. Projects that involve restoring eroded sections 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

32 Final Estimates Level 2 Earthwork Records Daily Report of Truck Measured Material Form Supplemental Information provided on: Truck Measured Sketch (Regular Bed) Form A Truck Measured Sketch (Irregular Bed) Form B Final Measurement Miscellaneous Form This is the Department s preferred Site Source Record Subsoil Limits Field Notes 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

33 Earthwork Records Daily Report of Truck Measured Material Form This form is used to track deliveries and calculated quantities of truck measured material. 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

34 Earthwork Records Truck Measured Sketch (Regular Bed) Form A This form is used to document truck measurements and verify truck capacities. 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

35 Earthwork Records Truck Measured Sketch (Irregular Bed) Form B This form is used to document truck measurements and verify truck capacities. 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

36 Earthwork Records Final Measurement Miscellaneous Form This form can be used for the following: Original Check Sections Final Check Sections Documenting TBMs Survey Notes Field Notes 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

37 Earthwork Records Limits of Subsoil Excavation Contractor should know the limits before subsoil excavation begins Widths and Depths are shown in the Plans Additional details in Standard Index 500 Authorized limits must be staked in the field and documented on a field record 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 37 Subsoil excavation limits can be applied only under the following circumstances: Limits are indicated on the original plans, and Plan notes clearly specify removal. If muck is found to be deeper than the plan depth, records shall be corrected, dated and initialed. 5-37

38 Earthwork Records Field Notes for Subsoil Excavation: 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

39 Earthwork Records Cross Section Notes 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 39 This data will be entered into Multiline or authorized program to calculate extra depth of subsoil excavation. 5-39

40 Earthwork Records 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

41 Earthwork Records 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 41 The beginning and ending of excavation shall always have a full cross section and should be identified with a note (Begin Cut or End Cut), or designated as a zero area. 5-41

42 Earthwork Records Field Notes for Subsoil Excavation Use original cross section terrain line unless changed by Pre Construction terrain sections. Original or Pre Construction field surveys shall be used as originals for subsoil 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 42 Original sections shall not be directly copied from the plan cross sections and recorded in the field records. Station s pluses needed to obtain the maximum 50 Feet interval or to obtain begin and end sections may be interpolated from location originals. Note: Full station = 100 ft. Pluses = distance <100 ft. in between stations 5-42

43 Earthwork Records Field Notes for Subsoil Excavation 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

44 Earthwork Records Field Notes for Subsoil Excavation 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

45 Earthwork Records Field Notes for Subsoil Excavation 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 45 Per the Standard Specifications, Subarticle : Where subsoil excavation extends outside the plan lines or authorized lines by the PA (including allowable tolerances) and the space is backfilled with roadway or borrow excavation, the net fill, plus shrinkage allowance shall be deducted from roadway excavation or borrow excavation quantity, as applicable. Total Embankment = Fill + Subsoil If subsoil quantity changes, the new change must be added or deducted to the total Embankment quantity. For Example: Item No (Embankment) is a plan quantity item which totals 5,000 CY. The 5,000 CY includes fill + subsoil. The original subsoil quantity on this project = 1,000 CY Subsoil changed on this project, to final subsoil = 1,300 CY Therefore, the total embankment quantity will increase by 300 CY So total embankment = 5,300 CY 5-45

46 Earthwork Records Field Notes for Channel Excavation Pre construction original sections shall always be taken just prior to beginning of excavation. Final sections are always required and must be plotted in conjunction with the template to determine the final pay quantity. 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

47 Earthwork Records Field Notes for Channel Excavation Final sections must account for shoaled material when authorized to remain. Deduct shoaled material left in place. 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 47 Specification and require the Contractor to maintain the project area from shoaling until final acceptance, when excavation of a channel is included in the contract scope. If shoaling occurs after final cross sectioning and prior to final acceptance of the job and the Engineer authorizes the shoaled material to remain in place, re-cross sectioning must be done to determine the volume of material to remain. The volume of any such material remaining within the limits of channel excavation shown in the plans shall be deducted from the measured quantity of channel excavation (Specification ). 5-47

48 Earthwork Records Processing Survey notes are entered in Multiline (or approved software) to process and generate earthwork quantities Full cross sections must be taken when the computer is used to process the earthwork volume Truck measured site source records are entered in Engineering Menu to generate earthwork quantities 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 48 Half sections are not acceptable for earthwork purposes. 5-48

49 Earthwork Records Processing Multiline will generate plots of the entered data and calculate appropriate volumes. 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 49 Original, final and template cross sections need to be plotted in Multiline to generate the Final Pay Quantity. 5-49

50 Earthwork Records Processing Engineering Menu will calculate volumes from the entered data (truck capacities and counts). 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

51 Earthwork Calculations Final Measurement Requirements Shrinkage and Swell Average End Area Plan Quantity Requirements Embankment 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

52 Earthwork Calculations Borrow Excavation Where vehicle load count is involved in reconciling quantities, make sure swell and shrinkage are considered. Example: Compacted Fill Vol.: 1 CY Shrinkage Factor: 35% Swell Factor: 20% 1 CY =1.62 CY 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 52 Shrinkage and fluff values are shown in the plans. Shrinkage: The decrease in volume of earth from its natural state to its compacted state. Swell: The increase in volume of earth from its natural state to loose state. A suggested formula is: Equivalent truck measured volume = Compacted fill volume (cross sectional volume) x (1 + shrinkage factor) x (1 + swell factor) Use shrinkage and swell factors as a decimal. 5-52

53 Earthwork Calculations Excavation How to Calculate? Roadway excavation: plan quantity pay item. Subsoil excavation: final measure pay item. Lateral ditch excavation: plan quantity pay item. Channel excavation: final measure pay item. Channel excavation and subsoil excavation are calculated by the average end area method with the plan template applied Channel and subsoil excavation plan templates can be found in cross section sheets or in bridge plans 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 53 Roadway Excavation: Measurements include only the net volume of material excavated between original and completed surfaces. This item is a plan quantity pay item. Subsoil Excavation: measurements include only material excavated within the lines and grades indicated in the plans (including the tolerance permitted therefore) or as directed by the Engineer. It is a final measure pay item. Lateral Ditch Excavation: Measurements include only excavated material within the lines and grades as indicated in plans or by the Engineer. This is a plan quantity pay item. 5-53

54 Earthwork Calculations End Areas Average End Area Method for calculating volume: Volume (V) = Area 1 +Area 2 Length Between Areas 54 Some areas are not included in calculations for pay. 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 54 What end areas are not payable? Excavation borrow (truck measure) placed above the grading template Subsoil excavation beyond authorized lateral limits for A-8 (muck) Subsoil excavation beyond authorized lateral and undercut limits for A-7 (plastic) Channel excavation below the grading template 5-54

55 Earthwork Calculations Areas Not Included for pay Truck Measure Borrow placed above the grading template No Pay Fill No Pay 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

56 Earthwork Calculations Areas Not Included for Payment Borrow placed in area beyond the project s subsoil lateral limits (unauthorized excavation) LIMIT 1 2 Authorized Subsoil Excavation Unauthorized 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 56 The volume of unauthorized excavation must be determined, then deducted from the proposed borrow pay (don t forget to account for shrinkage and fluff). 5-56

57 Earthwork Calculations Areas Not Included for payment Channel excavation outside the template will not be paid. Template Original Ground Line No Pay Final Cross Section Final Pay Area Area not excavated 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 57 Make sure that any deviation from the plan template does not compromise Contract permit requirements. Contractor must be notified of areas not excavated to the template. 5-57

58 Earthwork Calculations Bottom of Plan Muck Case I: Additional Depth Subsoil Original Ground Line Lowest point of unsuitable material indicated on plans. 1:2 Control Line Subsoil contract unit price Extra depth subsoil contract unit price + 25% 5' 15' No pay outside the 1:2 control line Extra depth subsoil excavation paid for as extra work and paid for at a negotiated price Bottom of actual muck excavation 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 58 Case I: Additional Depth Subsoil To be used when unsuitable material is indicated in the plans. Determination of the payment elevations is in accordance with the Standard Specifications, Subarticle Basis of Payment. In every case, the point of reference for determining extra depth subsoil excavation should be the lowest elevation that muck is shown on the plan cross section and this elevation projected horizontally across the entire cross section. Each cross section shall be considered separately. Refer to the CPAM 5.16 for additional clarification. The 1:2 control line will be utilized as shown in the Design Standards Index 505 Embankment Utilization Extra Depth Subsoil Excavation is paid for at a negotiated price. 5-58

59 Earthwork Calculations Subsoil contract unit price Extra depth subsoil contract unit price plus 25% Case II: Subsoil Excavation 1:2 Control Line Original Ground Line Bottom of Plan Elevation 5' 15' No pay outside the 1:2 control line Extra depth subsoil paid for as extra work Bottom of actual Muck Excavation 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 59 Case II: Subsoil Excavation To be used when no unsuitable material is indicated on the cross section. Determination of the payment elevations in accordance with the Standard Specifications, Subarticle When subsoil excavation is encountered where none was shown on the plans, either in separate areas or as an extension to areas that were shown. The point of reference shall be the lowest elevation on the grading template. The 1:2 control line will be utilized as shown in the Design Standards Index 505 Embankment Utilization Refer to CPAM 5.16 for additional information. 5-59

60 Earthwork Calculations Case II: Subsoil Excavation Original Ground Line Lowest Template Elevation Subsoil contract unit price 5' Extra depth subsoil contract unit price + 25% No pay outside the 1:2 control line 1:2 Control Line Final cross section 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 60 Case II: Subsoil Excavation Also, use Case II when no unsuitable material is indicated in the cross section. Determination of the payment elevations in accordance with the Standard Specifications, Subarticle Basis of Payment. The 1:2 control line will be utilized as shown in the Design Standards Index 505 Embankment Utilization Refer to CPAM 5.16 for additional information. 5-60

61 Example Calculate Total Subsoil, Roadway Excavation and Final Embankment Volume 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

62 Excavation 46 SF Calculate Total Subsoil, Roadway Excavation and Final Embankment Fill 62 SF Excavation 324 SF Begin Subsoil SUBSOIL ROADWAY EMBANK EXCAVATION EXCAVATION MENT A V A V A V (SF) (CY) (SF) (CY) (SF) (CY) Design Subsoil 445 SF 497 SF Final Subsoil Excavation 35 SF Fill 153 SF Excavation 502 SF Design Subsoil 259 SF 353 SF Final Subsoil Excavation 41 SF Fill 136 SF Excavation 979 SF Design Subsoil 446 SF 312 SF Final Subsoil End Subsoil Existing grade Road Template Subsoil Excavation (per Design) Final Subsoil Excavation Limits 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module

63 SUBSOIL ROADWAY EMBANK EXCAVATION EXCAVATION MENT A V A V A V (SF) (CY) (SF) (CY) (SF) (CY) Excavation 46 SF Fill 62 SF Excavation 324 SF Begin Subsoil Final Qty Design Qty Design Subsoil 445 SF 497 SF Final Subsoil Note: Final quantities shall be noted in red Existing grade Road Template Subsoil Excavation (per Design) Final Subsoil Excavation Limits 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 63 Identify subsoil, roadway excavation, and fill quantities. For the example above, at Sta : Calculate the quantities for roadway excavation and total fill using the design quantities: Subsoil Excavation = 445 SF Roadway Excavation = = 370 SF Total Fill = = 507 SF Designer quantities will be shown in the plans. During construction, the subsoil quantity at this station increased to 497 SF. Therefore, strike through the original (design) subsoil quantity at this station (445 SF) and record the final quantity (497 SF). The embankment (total fill) quantity will also change. Strike through the original fill quantity (507 SF) and record the new quantity: Embankment = Subsoil + Fill = = 559 SF Note: All final calculations shall be done in red. 5-63

64 Excavation 46 SF Fill 62 SF Excavation 324 SF Begin Subsoil SUBSOIL ROADWAY EMBANK EXCAVATION EXCAVATION MENT A V A V A V (SF) (CY) (SF) (CY) (SF) (CY) Final Qty Design Qty Design Subsoil 445 SF 497 SF Final Subsoil Excavation 35 SF Fill 153 SF Excavation 502 SF Final Qty Design Qty Design Subsoil 259 SF 353 SF Final Subsoil Existing grade Road Template Subsoil Excavation (per Design) Final Subsoil Excavation Limits 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 64 Note: Final quantities shall be noted in red Calculate the volume between two stations: Designer quantities will be shown in the plans. Identify subsoil excavation, roadway excavation, and fill area quantities. Strike through the subsoil and fill quantities and record the final quantities. (See previous slide) Calculate the volume between these two stations using the average end area method. The equation to use is: Or Where: A = Area in SF L = distance between stations in FT 1 CY = 27 FT

65 Excavation 46 SF Fill 62 SF Excavation 324 SF Begin Subsoil SUBSOIL ROADWAY EMBANK EXCAVATION EXCAVATION MENT A V A V A V (SF) (CY) (SF) (CY) (SF) (CY) Final Qty Design Qty Design Subsoil 445 SF 497 SF Final Subsoil Final Qty Design Qty Excavation 35 SF Fill 153 SF Excavation 502 SF Final Qty Design Qty Design Subsoil 259 SF 353 SF Final Subsoil Excavation 41 SF Fill 136 SF Excavation 979 SF Design Subsoil 446 SF 312 SF Final Subsoil End Subsoil Existing grade Road Template Subsoil Excavation (per Design) Final Subsoil Excavation Limits 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 65 Note: Final quantities shall be noted in red Calculate the Subsoil Volume between Sta and : A 1 = 445 SF A 2 = 259 SF Design (original) quantities L = 100 FT, Calculate the volume calculated using the final subsoil quantities:, Strike through the design volume and enter the final volume. This applies to the volumes between the following stations. Notice that the volume quantity is in the volume column between the two stationed area quantities. 5-65

66 Excavation 46 SF Excavation 35 SF Final Solution Fill 62 SF Design Subsoil 445 SF Fill 153 SF 497 SF Final Subsoil Excavation 324 SF Excavation 502 SF Begin Subsoil SUBSOIL ROADWAY EMBANK EXCAVATION EXCAVATION MENT A V A V A V (SF) (CY) (SF) (CY) (SF) (CY) Final Qty Design Qty Final Qty Design Qty Final Qty Design Qty Excavation 41 SF Fill 136 SF Design Subsoil 259 SF 353 SF Final Subsoil Excavation 979 SF Final Qty Design Qty Final Qty Design Qty Design Subsoil 446 SF 312 SF Final Subsoil Note: Final quantities shall be noted in red End Subsoil Existing grade Road Template Subsoil Excavation (per Design) Final Subsoil Excavation Limits Original Total 2,609 4,563 3,543 Final Total 2,805 4,563 3,739 For subsoil, subtract the design (original) quantity and add/subtract the final subsoil quantity to/from the embankment s final quantity, as applicable. Final Subsoil Total Original Subsoil Total = 2,805 2,609 = 196 CY In this example, calculate the Final Embankment Total by adding the difference in subsoil to the Original Embankment Total: ,543 = 3,739 CY Always check the EOR s method of calculation/documentation. Some designers include subsoil with the fill quantity, while others don t. 5-66

67 Module Review 1. Bench run 2. Field check to compare plans to actual terrain 3. Earthwork Survey/Cross Section Waiver 4. Preconstruction Survey Letter to Contractor 5. Letter of concurrence from Contractor 6. May require plan quantity review 7. Keep up to date field measured earthwork items (i.e., subsoil, channel excavations, truck measured borrow) 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module 5 67 If the EOR included estimated subsoil in plan quantity, then that quantity must be deducted and the actual quantity added to the embankment quantity. This quantity could also be reduced in the embankment total due to an underrun from the Designer s proposed quantity. 5-67

68 ANY QUESTIONS? 11/1/2017 FDOT Final Estimates Level 2 Release 11, Module