for Highway Construction Page 485 of 71 5 SECTION 607 – EMBANKMENT PROTECTORS
607.01 Description.
Provide and install corrugated metal embankment protectors .
607.02 Materials.
Use entrance and exit sections that meet the requirements of AASHTO M 36 or AASHTO M 196. Provide the discharge pipe as specified in 706.06. Use all steel or all aluminum for each assembly.
607.03 Construction Requirements.
Install the entrance device to prevent water from percolating under or around the structure. Install discharge pipe as specified in 602.03. Securely anchor the pipe to the ground surface where it is not possible to provide a trench for the installation.
607.04 Method of Measurement.
The Engineer will measure acceptably completed work as follows:
1.Embankment protectors will be by each unit. An entrance and an exit section is 1 unit.
2.Discharge pipe will be by the foot.
607.05 Basis of Payment .
The Department will pay for accepted quantities at the contract unit prices as follows: Pay Item Pay Unit Embankment Protector, Type ___ .......................................................... Each Discharge Pipe ....................................................................................... FT The Department will measure and pay for materials necessary to pave the inlet area as specified in 405 or 406. Excavation , backfill, outlet protection, and anchorage are incidental . for Highway Construction Page 486 of 715 SECTION 608 – PIPE APRONS
608.01 Description.
Provide and ins tall aprons as specified to the inlet and outlet ends of pipe culverts.
608.02 Materials.
Provide material aprons as specified in: Concrete Aprons ........................................................................................................................... 509 Metal Aprons ........................................................................................................................... 708.21 Use galvanized or stainless steel bolts , nuts, and washers. Galvanize other material to meet AASHTO M 232. Fabricate safety, longitudinal, and opt ional bars from steel pipe meeting the requirements of ASTM A53 Schedule 40 and hot -dipped galvanize the bars after fabrication for metal safety aprons . Use galvanized steel that meets AASHTO M 111. Use Class 30 concrete for apron cutoffs. Use conc rete aprons that meet the reinforced Class III concrete pipe. Provide metal or concrete aprons for installation. Attached aprons are required to use the same m aterial as the aprons used for the pipe material.
608.03 Construction Requirements.
Shape area occupied by the apron to conform to the bottom of the structure and to provide a firm and uniform support over its entire area. Backfill cutoff walls and areas adjacent to the apron to prevent undercutting or erosion.
608.04 Method of Measurement.
The Engineer will measure acceptably completed work by the each. The Engineer will include the culvert sections attached to aprons in the measurement of the culverts.
608.05 Basis of Payment .
The Department will pay for accepted quantities at the contract unit prices as follows: Pay Item Pay Unit ___ Aprons for Pipe ................................................................................ Each ___ Metal Safety Apron (Parallel) ........................................................... Each ___ Metal Safety Apron (Cross Drainage) .............................................. Each Structure excavation and compacting backfill are incidental and the cost included in the pipe apron unit price. Concrete for the cutoff is incidental and is included in the aprons contract unit price.
Source: Idaho Standard Specifications for Highway Construction, 2023 Edition. Pages 521–521 of 768.