SECTION 610 - STONE FILL, RIPRAP, STONE BLANKET, AND STONE DITCH PROTECTION
610.01 Description This work shall consist of excavating for and constructing a
protective covering of stone. The types of protective covering of stone are designated as follows: 6-42
a.Stone fill Machine placed embankment for fill slope
b.Plain Riprap Machine placed stones on earth bedding
c.Hand Laid Riprap Hand placed stones on earth bedding
d.Stone Blanket Machine placed stones around piers and Abutments
e.Heavy Riprap Machine placed stones on earth bedding
f.Stone Ditch Protection Machine placed ditch protection of rock
610.02 Materials Materials shall meet the requirements of the following Sections of
Division 700 — Materials:
Stone Fill 703.25 Plain and Hand Laid Riprap 703.26 S t o n e B l a n k e t 703.27 Heavy Riprap 703.28 610.031 General Suitable material removed when excavating for the placing of riprap, stone fill, stone blanket or stone ditch protection shall be used in the formation of embankments, subgrade and for backfilling as shown on the plans or as directed. 610.032 Placing Stones
a.Stone Fill and Stone Blanket Material for stone fill shall be deposited to provide a compact mass. The exposed slope shall be finished to the line and grade required without special handling or handwork. Material for stone blanket shall be deposited for protection around piers or abutments as shown on the plans. The stones shall be placed individually to form a reasonably compact mass. Spaces between the larger stones shall be filled with stone or spall of suitable size to leave an even surface conforming to the contour required. Stone fill and stone blanket shall be placed on the slope in a well-knit, compact and uniform layer. The surface stones shall be chinked with smaller stone from the same source.
b.Riprap Stones for riprap shall be placed upon a slope properly graded and compacted as called for. When required, the bottom of the riprap shall be placed in a trench at the toe of the slope. Plain riprap shall be placed full depth in one operation without special handwork and shall be placed approximately true to the required slope line and grade and be uniform in appearance. Hand laid riprap shall be random rubble, hand laid stones for the full depth placed in one operation to secure interlocking of all face stones and stones placed as backing. Larger stones shall be laid at the base of the slope. The stones shall be laid in close contact with the longer axis perpendicular to the plane of the slope to stagger joints. Except when required to be grouted the openings between the stones in all riprap shall be filled with spall, or rocks securely rammed into place. Riprap shall be placed on the slope in a well-knit, compact and uniform layer. The surface stones shall be chinked with smaller stone from the same source. 6-43 Stones for heavy riprap shall be placed to the full depth in one operation without special handwork or machine work upon a properly graded and compacted slope. Above the low water elevation, stones shall be placed to form an approximate uniform surface, free from humps or depressions, with no excessively large stones projecting from the general surface. Loose stones or excessively large stones tending to extend above the average general surface shall be embedded, reoriented, or discarded. The openings between stones on the face of heavy riprap shall be filled with spall or small rocks, securely rammed into place.
c.Stone Ditch Protection The ditch shall be excavated below the flow line to allow placement of the rock material to the specified depth. The stone ditch protection shall be placed, full depth, in one operation without special handwork, shall be approximately true to line and grade and shall be uniform in appearance.
d.Inspection The grading of riprap, stone fill, stone blanket and stone ditch protection shall be determined by the Resident by visual inspection of the load before it is dumped into place, or, if ordered by the Resident, by dumping individual loads on a flat surface and sorting and measuring the individual rocks contained in the load. A separate, reference pile of stone with the required gradation will be placed by the Contractor at a convenient location where the Resident can see and judge by eye the suitability of the rock being placed during the duration of the project. The Resident reserves the right to reject stone at the job site or stockpile, and in place. Stone rejected at the job site or in place shall be removed from the site at no additional cost to the Department.
610.05 Method of Measurement Stone fill, plain riprap, hand l aid riprap, stone
blanket, heavy riprap and stone ditch protection will be measured by the cubic yard, complete in place, except that when placed under water the quantity may be measured by truck load count with no reduction in volume.
610.06 Basis of Payment The accepted quantities of stone fill , plain riprap, hand laid
riprap, stone blanket, heavy riprap and stone ditch protection and materials to fill the voids will be paid for at the contract unit price per cubic yard complete in place. Costs of all required excavation below the slope line for the placement of bedding, riprap, stone fill, stone blanket, stone ditch protection and for furnishing and placing the bedding material itself, will be considered incidental to the contract items and no separate payment will be made. Payment will be made under: P a y I t e m P a y U n i t
610.07 Stone Fill C u b i c Y a r d
610.08 Plain Riprap C u b i c Y a r d
610.09 Hand Laid Riprap C u b i c Y a r d
6-44
610.11 Stone Blanket C u b i c Y a r d
610.16 Heavy Riprap C u b i c Y a r d
610.18 Stone Ditch Protection C u b i c Y a r d
SECTION 611 - Reserved
Referenced in this section
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Source: Standard Specifications — Highways and Bridges, 2020 Edition. Pages 511–514 of 817. View official source ↗