- 644 - SECTION 727 -- SUBSURFACE DRAINAGE MATTING
727.01 Description
1.This work shall consist of furnishing and installing drainage matting at bridge ends as shown in the contract.
727.02 Material Requirements
1.The drainage matting to be us ed shall be on the Department’s Approved Products List.
2.Materials that are not on the De partment’s Approved Products List may be considered for use provided a manufacturer's certificate of compliance for the proposed materials is provided to the Engineer. Material criteria are listed on the Departm ent’s Approved Products List.
727.03 Construction Methods
1.The Contractor shall place the matting at the location shown in the contract.
2.The matting shall be placed in accordance with the manufacturer's recommendation.
3.A 3 inch (75 mm) minimum lap shall be used wh en splicing the matting.
727.04 Method of Measurement
1.Subsurface drainage matting is measured by the square yard (square meter) of area covered with no allowance for overlaps.
727.05 Basis of Payment
1.P a y I t e m P a y U n i t Subsurface Drainage Matting Square Yard (SY) [Square Meter (m2)]
2.Payment is full compensation for all work described in this Section. - 645 - SECTION 728 -- RIPRAP FILTER FABRIC
728.01 Description
1.This work shall consist of furn ishing and installing a riprap filter fabric at the locations shown in the c ontract and as directed by the Engineer.
728.02 Material Requirements
1.The filter fabric to be used sh all be on the Department’s Approved Products List.
2.Filter fabric materials that ar e not on the Department’s Approved Products List may be considered for use provided a manufacturer's certificate of compliance for the pro posed materials is provided to the Engineer. Material criteria are listed on the Department’s Approved Products List.
728.03 Construction Methods
1.The surface underlying the geotextile shall be prepared to a relatively smooth condition free of obstructions, depressions, and debris. Erosion features (i.e., rills, guillies, et c.) shall be graded out of the surface before geotextile placement.
2.The geotextile shall be placed on the underlying surface such that the geotextile is not damaged. The f abric shall be placed so that the upstream strip of fabric will overlap th e downstream strip. Material overlap for unstitched seams shall be a minimum of 40 inches (1 m). The geotextile shall be laid smooth so as to minimize tension, stress, folds, wrinkles, and creases.
3.The geotextile shall be held in place by adequate pinning, selectively placed riprap, or a combi nation of pinning and riprap prior to placement of the specified riprap.
4.The geotextile shall be covered with the specified riprap within 5 days after placement of the geotexti le. Placement of specified riprap onto the geotextile shall not rupture the geotextile.
728.04 Method of Measurement
1.The item, "Riprap Filter Fabric ", shall be measured by the square yard (square meter) of the area covered by the fabric and accepted by the Engineer with no allowance for overlaps.
728.05 Basis of Payment
1.P a y I t e m P a y U n i t Riprap Filter Fabric Square Yard (SY) [Square Meter (m2)]
2.Payment is full compensation for all work described in this Section.
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 678–678 of 1,048.