1901Measurement of Quantities

Unless otherwise specified, the Engineer will measure in accordance with this section. The Engineer will determine quantities of acceptable Work using one of the following methods:

the Statement of Estimated Quantities on the Plans, the Department will use the Plan Quantities for payment

the Engineer will field measure quantities of Work performed

The Engineer may adjust quantities for portions of the Work or the entire Project. The Engineer will not adjust quantities if a difference results from use of commonly accepted dimensional approximations. The Engineer will determine quantities using the US Customary System of weights and measures. The units and the methods of measurement in the Contract for each class of W ork will supplement or modify the provisions in this section by any of the following:

Item names for pay quantities may include designated terms to indicate the basis for unit measurements, such as where or when the Engineer will take the unit measurements or make computations . Unless otherwise required by the Contract, the Engineer will make measurements and computations as specified in this section. The Contractor may dispute the Engineer's determination of pay quantities by submitting a written request to the Engineer. The Contractor shall state the Contract Item and sections of the Project disputed and provide details to justify the Engineer's review of the pay quantity. The request must be consistent with conditions governing the Contract Item. The Engineer will not review quantities unless the Contractor provides evidence substantiating that the quantity is incorrect. 1901.1 (P) QUANTITIES If the Department places a (P) designation on individual Contract Items or specific portions of Contract Items in the Statement of Estimated Quantities on the Plans, the Department will use the Plan dimensions to calculate the pay quantity for that Contract Item. The Department will limit use of the (P) designated quantities to Contract Items with specified dimensions and controlled by field checks during or after construction.

The purpose of the Department’s use of (P) designated quantities is to avoid the expense of measuring dimensions, if original Plan dimensions remain valid. The Engineer will determine the quantities of Contract Items that do not have a (P) designation, using the methods of measurement required by the Contract, unless otherwise agreed in writing. The Engineer will use Plan dimensions as applicable for completed Work. The Engineer will only use field dimensions if required by the Contract or as necessary to accurately dimension completed Work. The Engineer will adjust a (P) designated quantity if the Engineer revises the dimensions of the Work or decides the (P) designated quantity is incorrect. The Engineer will only adjust quantities for the revised or corrected portions of the (P) designated Contract Item.

1901.2AREAS

For longitudinal measurements, the Engineer will measure horizontally for computing an area and will not make deductions for Structures with an area less than 1 square yard. For transverse measurements, the Engineer will use the neat line dimensions shown in the Plans or ordered by the Engineer.

1901.3STRUCTURES

The Engineer will measure Structures using the neat line dimensions shown on the Plans, or the dimensions as altered to fit field conditions.

1901.4LENGTH

The Engineer will measure Contract Items requiring a linear unit of measure, such as pipe Culverts, guardrail, and underdrains, parallel to the base or foundation on which the Structure is placed.

1901.5VOLUME

A Excavated Volume (EV) — Cubic Yard The Engineer will determine the cubic yards of Excavated Volume (EV) using the cross -section method or digital surface model method to measure the Material in its original position. B Compacted Volume (CV) — Cubic Yard The Engineer will determine the cubic yards of Compacted Volume (CV) using the cross -section method or digital surface model method to measure the compacted Material in its final position, in accordance with the placement dimensions required by the Contract or directed by the Engineer. C Loose Volume in Vehicular Measure — Cubic Yard The Engineer will determine the cubic yards of Loose Volume (LV) using the vehicular measure method. The Engineer will measure the Material at the point of delivery to the nearest 0.10 cubic yard. The Contractor may use vehicles for hauling Material to the Project of any size or type if the Engineer can easily determine the vehicle body capacity and view the contents . The Engineer will determine the struck capacity for each vehicle. The Contractor shall mark the struck or level perimeter line on the inside of the box of each vehicle. The Contractor shall load the vehicle and level the load as directed by the Engineer . The Contractor shall provide over-allowance for settlement of the load during transit. The Engineer may direct the Contractor to level any load upon its arrival at the point of delivery . The Engineer will not measure Material heaped above the struck capacity of the vehicle. The Engineer will make deductions in 0.5 cubic yard increments on loads that contain less than the struck capacity. The Contractor shall provide hauling vehicles with a conspicuous, legible identification mark that is acceptable to the Engineer. D Stockpiled Volume (SV) — Cubic Yard The Engineer will determine the cubic yards of Stockpiled Volume (SV) using the cross -section method or the digital surface model method to measure Material in the stockpiled position. The Contractor shall shape the stockpile to a condition directed by the Engineer before measurement.

1901.6MASS

For measuring or proportioning Material by mass, the Contractor shall provide certified weights or weigh Material on calibrated, approved scales. The Contractor shall give the Engineer a copy of the inspection certificate. The Contractor shall provide an automated weighing device for Materials hauled in trucks and paid for by mass. A Certified Weights The Contractor is not required to weigh Materials in the presence of the Engineer if the Contractor delivers the Material in original containers marked with the certified weight . If the Engineer suspects a loss of Material, the Engineer will require the Contractor to reweigh the Material. B Scale Testing and Calibration The Contractor shall ensure an authorized person tests and calibratesS cales before use on the Project. The Contractor shall provide test weights, accessories, and assistance required for testing and calibrating the Scales. The Contractor shall test and calibrate the Scales in accordance with the frequency, criteria, tolerances, and sensitivity requirements in this section. B.1 Authorized Person An authorized person, as defined by one of the following descriptions, shall test and calibrate the Scales:

Minnesota Department of Commerce

supervision of the Engineer B.2 Frequency The Contractor shall test and calibrate the Scales in accordance with the following:

as Work progresses

for Materials weighed in the hauling vehicle

Project

B.3 Testing and Calibration Criteria The authorized person shall test and calibrate the Scales with calibrated test weights. The Contractor shall provide calibrated test weights certified by the Minnesota Department of Commerce within the preceding 12 months, unless otherwise allowed by the Engineer. The authorized person may weigh the supplemental mass of Material or Equipment on the S cales after initial calibration and use to supplement the calibrated test weights. The Contractor shall verify commercial Scales have current certification from the Minnesota Department of Commerce before the Engineer will allow use on the Project.

B.3.a Testing and Calibration by Registered Scale Service Person If a registered Scale service person performs testing and calibrating, the service person shall test Scales up to the maximum expected load weighed on the Project. The Contractor shall provide evidence to the Engineer that Scales meet the Contract requirements. B.3.a(1) Truck Scales The registered Scale service person shall use at least 22,050 pounds of calibrated test weights along with the supplemental mass. B.3.a(2) Batch Scales The registered Scale service person shall use at least 1,100 pounds of calibrated test weights along with the supplemental mass. B.3.b Testing and Calibration by the Contractor If the Contractor tests and calibrates the Scales, the Contractor shall perform a comparison test. The Contractor shall perform the comparison test at the minimum and maximum expected loads weighed during the Project. B.3.b(1) Truck Scales The Contractor shall weigh an empty truck and a loaded truck of the size and capacity the Contractor will use on the Project on a certified commercial Scale, then, weigh the same empty truck and loaded truck on the Scale the Contractor will use on the Project. B.3.b(2) Batch Scales The Contractor shall make calibrated test weights available at each Scale installation, at all times to provide a total test mass of 30 percent of the net load the Contractor will weigh not exceeding 1,100 pounds of test weights. The Engineer may allow the Contractor to weigh a load, or series of loads, in a hopper then drop the load into a truck that has been weighed on a certified commercial Scale. The Contractor shall weigh the loaded truck on the same certified Scale. B.4 Scale Tolerance B.4.a Calibration with Calibrated Test Weights The Contractor shall use Scales with Scale indications within 1 percent of the value of the calibrated and supplemental test weights applied to the S cale. B.4.b Calibration with a Certified Commercial Scale Indicated loads on the calibrated Scale shall agree within 1 percent with the indicated loads on the certified commercial Scale. B.5 Scale Sensitivity B.5.a Weighbeam Indicators The Scale indicator, at the normal minimum and maximum loads, shall sense a change in load equal to 0.2 percent of the load on the Scale. B.5.b Dial or Digital Indicators A sensitivity test is not applicable, but the dial or digital indicator shall respond uniformly and smoothly to changes in loads on the Scale.

C Automated Weighing Device If the Department pays for Materials, hauled in trucks, by mass, the Contractor shall provide Scales integrated with a ticket printer. Tickets shall include the date, Project number, Contract Item number, truck or tractor and trailer identification, truck tare, and net mass . The truck driver shall give the ticket to the Inspector on the Project. The Contractor shall not provide a ticket to truck drivers if the weight of the load is in excess of the legal load limits in place. D Computerized Loader Bucket Scales The Contractor may use computerized Loader Bucket Scales to weigh materials when the quantity of material included in the bid item list is 5000 tons or less. The Contractor shall equip loader bucket scales with an onboard computer that produces weigh tickets. The Contractor shall load trucks on a level loading area and with the loader scale in dynamic mode and operate the loader scale in accordance with the manufacturer’s guidelines. The computerized loader bucket scale must be accurate to within 1.0 percent of the true weight of the applied load throughout the range of use. D.1 Computerized Loader Bucket Scales – Comparison Test Before the first use of the loader bucket scale on the project and any time the scale is recertified, the Contractor shall perform a comparison test using one of the following methods:

After placing the load in a truck, weigh the loaded truck on a certified scale owned and operated by an entity other than the Contractor. Provide the tare weight of the truck along with the comparison weigh ticket.

Weigh an object on the project scale and compare its certified weight to the loader bucket scale readout. Use an object that is free of mud and dirt and has a certified weight of at least 60 percent of the capacity of the loader bucket. Weld a plate onto the object showing its certified weight. Provide an affidavit affirming the weight of the object, as measured on a certified scale. Provide a new affidavit when requested by the Engineer or if changes are made to the object that will affect the certified weight. D.2 Computerized Loader Bucket Scales – Random Comparison Test If a comparison test reveals that the scale is out of tolerance, repair and recertify the scale. At any time, the Engineer may require the scale to be checked for accuracy utilizing any test method in 1908.D.1, “Computerized Loader Bucket Scales – Comparison Test.” The Engineer may prohibit the use of loader bucket scales if two consecutive tests fail.

D.3 Computerized Loader Bucket Scales – Documentation The Contractor shall generate weigh tickets using the onboard computer and loader bucket scale printer and provide tickets to the truck driver. The Contractor shall provide daily haul summaries by computer-generated spreadsheet as provided by the Engineer. The Contractor shall provide the fully completed spreadsheet to the Engineer daily.

1901.7BITUMINOUS MATERIALS

The Engineer will measure bituminous Materials by the gallon or ton, and make corrections for loss, waste, foaming, and quantities not incorporated in the Work. The Engineer will make volumetric measurements of bituminous Materials at 60°F or will correct the amount based on a volume at 60°F, using the Bituminous Manual. The Engineer will determine the volumetric content of transport and storage tanks using the tank manufacturer’s calibrated measuring devices and outage tables, based on the computed or certified tank capacity, or the Engineer will compute the content from the density factors derived from tests.

1901.8OTHER BASIS OF MEASUREMENT

For measuring or proportioning Material by mass, the Contractor shall provide certified weights or weigh Material on calibrated, approved scales. The Contractor shall give the Engineer a copy of the inspection certificate.

1901.9TIMBER AND LUMBER

The Engineer will measure timber and lumber by at least one of the following:

extreme length of each piece in the finished Structure

1901.10LUMP SUM

If used as a unit of measure, the term “lump sum” shall mean complete payment for the Contract Item as described in the Contract.

1901.11INDIVIDUAL UNIT OR EACH

If a complete Structure, Contract Item, or lump sum unit is specified as the unit of measure, the Engineer will measure the unit based on physical count and will include fittings and accessories.

1901.12RENTAL EQUIPMENT

The Engineer will measure rental Equipment based on time in hours of actual working time and traveling time of the Equipment within the Project.

1901.13STANDARDS AND TOLERANCES ................................................................................ 1503 & 1603

If the Contract specifies standard manufactured items, such as fencing, wire, plates, rolled shapes, pipe conduit, the Engineer will consider the identification of unit mass and section dimensions as Nominal.