604.13 Method of Measurement :
Pipe of the different types and sizes, both new and re -laid, will be measured by the linear foot in place, the measurement being made along the centerline of each pipe installed. Branch connections, te es, wyes, and elbows will be measured along their centerlines and these lengths included in the total lengths of the pipe. Wyes, tees, and other branch connections will be measured along the centerlines to points of intersection. Pipe with sloped or skew ed ends will be measured along the invert. The portion of pipe extending through to the inside face of headwalls of all types, manholes, inlets, boxes, or other structures shall be included in the measurement. Pipe designated on the Plans to be installed by the jacking method will be measured separately by the linear foot in place and shall be the actual portion jacked, completed in place, and accepted. End sections will be measured by the number of units installed.
604.14 Basis of Payment :
The quantities, determined as provided above, will be paid for at the contract unit prices bid for the items listed in 604.15, which prices and payments shall be full compensation for excavation and bedding, except as oth erwise provided, backfilling, jacking when called for, furnishing all materials and doing all the work prescribed in a workmanlike and acceptable manner, including all labor, tools, equipment, supplies, and incidentals necessary to complete the work. The unit price bid for end sections shall include excavation and backfill. When, by the authority of the Engineer, the flow line of a pipe is lowered from that shown on Plans, or due to a lack of a firm foundation, or due to a solid rock foundation, unsatisfa ctory material is removed and replaced with suitable material, the work of excavation, replacement, and compaction of material will be paid for in accordance with 109.4.
1.For pipe culverts less than forty -eight ( 48) inches diameter, the work of excavation, measured in excess of one ( 1) foot below the original planned pipe elevation, will be paid for under the provisions of 109.4. When suitable material is not available from the project excavation, payment for replace ment material below final grade line will be made in accordance with subsection 109.4.
2.For pipe culverts 48 -inches diameter or larger, all additional excavation below the original planned pipe elevation and for a width not in excess of the outside pipe diameter plus eighteen ( 18) inches on each side of the pipe, will be paid for at the unit bid price for Item 207001 -* "Unclassified Excavation". When no Item 207001 -* is included in the Proposal, payment for excavation, backfill compaction and replacement material will be made in accordance with 109.4. When suitable material is not available from the project excavation, replacement material will be paid for in accordance with 109.4.
604.14.1 Price Adjustment: Crushed aggregate not conforming with the gradation
requirements as described in subsection 604.2.4.2 will be paid for at the adjust ed contract price base on the degree of nonconformance as specified in Table 604.14.1. A revised unit price for calculation purposes in subsection 307.9.1 will be established based on the unit bid cost minus the cost of the pipe.
Source: West Virginia Standard Specifications for Road and Bridge Construction, 2023 Edition. Pages 412–412 of 1,006.