- 750 - SECTION 913 -- RIGHT-OF-WAY MARKERS
913.01 Description
1.The Contractor shall furnish, install, and relocate right-of-way markers as described in the contract.
913.02 Material Requirements
1.Concrete shall be Class 47BD-3,000 (47BD-20).
2.Reinforcing steel shall meet the requirements of Section 1020.
3.One or more markers shall be broken to facilitate a visual inspection of the quality and dimensio ns of the concrete and reinforcing steel.
913.03 Construction Methods
1.The Contractor shall install and /or relocate the right-of-way markers as indicated in the contract.
2.The forms shall be designed so the finished marker will conform to the dimensions shown in the contract.
3.Reinforcement shall be placed and wired in position so that the reinforcing steel will not be displaced during concrete placement and consolidation.
4.The concrete shall be thoroughl y consolidated by hand methods or mechanical vibration.
5.All surfaces shall be given an "Ordinary Surface Finish" in accordance with Subsection 704.03.
6.All markers cracked or broken in handling or delivery shall be rejected.
7.Markers removed during construction operations shall be stored near the site of removal and protected from all damage until they have been reset.
8.Excavation shall be made to the required depth and the markers set plumb and firm. The marker holes shall be at least 4 inches (100 mm) larger than each dimension of t he marker's base. The area shall be backfilled with suitable material compacted with mechanical or hand tampers.
913.04 Method of Measurement
1.The quantity of "Right-of-Way Ma rkers" is measured by the each.
2.The quantity of right-of-way mark ers that are reset is measured by the each.
913.05 Basis of Payment
1.Pay Item Pay Unit Right-of-Way Markers Each (ea) Reset Right-of-Way Markers Each (ea)
2.Removal of damaged markers shall be subsidiary to the marker pay item.
3.Payment is full compensation for all work described in this Section. - 751 - SECTION 914 -- PIPE UNDERDRAINS
914.01 Description
1.The Contractor shall furnish an d install pipe underdrains, filter fabric, and underdrain headwalls as described in the contract.
914.02 Material Requirements
1.All materials shall conform to the requirements in Table 914.01. Table 914.01 Material Requirements Applicable Materials Section Corrugated Pipe Underdrains 1035 Plastic Pipe 1038
2.Gravel aggregate placed in the trench shall conform to the gradations shown in Table 914.02. The material shall have a Los Angeles Abrasion loss percentage (AASHTO, T-96) of not more than 40. The material shall also have a soundness loss of not more than 12% by weight at the end of 5 cycles using sodium sulfate solution. Table 914.02 Granular Backfill Material Percent Passing English Sieve Size (Metric) Target Value Tolerance 1 inch (25 mm) 100 0 1/2 inch (12 mm) 94 ±4 No. 4 (4.75 mm) 65 ±25 No. 10 (2.00 mm) 20 ±20 No. 50 (300 m) 5 ±5 No. 200 (75 m) 3 ±3
3.Granular backfill material shall be compacted to optimal stiffness as defined by a deflection target value established by the Engineer.
4.The trench should be lined with an approved filter fabric before filling with aggregate. The filter fabric shall be installed according to the contract details.
5.Filter fabric shall be on the Department’s Approved Products List.
6.The filter fabric material will be chosen to accommodate the type of in-situ soils and within the manuf acturer’s requirements and limits.
914.03 Construction Methods
1.a. The trench for laying pi pe underdrains shall be excavated beginning at the outlet end and proce eding toward the upper end, true to the required line and grade.
b.Trenches shall be of sufficient width to provide working space on each side of the pipe and in no case shall the width of the trench be less than 12 inches (300 mm).
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 784–784 of 1,048.