1093 temporary silt fence, or for patching, due to contamination or damage by the contractor. The removal of sediment will be paid for at the contract unit price per cubic yard, including the removal and disposal of silt accumulations as provided for in the Special Provisions and the erosion control plan for the project. 916- 1 Description: The work under this section shall consist of furnishing all materials and constructing Portland cement concrete embankment curbs at the locations shown on the project plans or otherwise designated in accordance with the details shown on the plans and the requirements of the specifications. 916- 2 Materials: Portland cement, water, and admixtures shall conform to the requirements of Section 1006 of the specifications for Class B concrete, except that the 28- day compressive strength requirement shall be eliminated. Fine aggregate and coarse aggregate shall conform to the requirements of Subsection 1006 -2.03 of the specifications. The designated size of coarse aggregate shall be No. 8, No. 7, No. 67 or No. 57. The contractor may add additional fine aggregate to the aggregate for the curb in order to facilitate finishing. Fine aggregate for this purpose shall be nonplastic and shall conform to the following grading requirements: Sieve Size Passing Percent No. 4 100 No. 200 0 - 10.0
Fine aggregate added for this purpose shall not exceed 25 percent of the total aggregate for the concrete curb. Liquid membrane- forming compound shall conform to the requirements of AASHTO M 148, Type I, Class A. 916- 3 Construction Requirements: The contractor shall be responsible for furnishing the various ingredients and for proportioning and mixing them; however, approval of the TABLE OF CONTENTS INDEX 1094 proposed materials and proportioning and mixing shall be obtained prior to any concrete operations. No field tests will be required on the concrete mixture. The requirements for mixing and placing concrete in cold weather shall conform to the requirements of Subsection 1006- 5.03 of the specifications. There is no maximum temperature limitation on the concrete mixture immediately befor e placement. Embankment curb shall be constructed either by the use of conventional fixed forms or by slip- form curb placing machines. The surface on which the curbs are to be placed shall be cleaned of all loose dirt and debris prior to placing. The work shall be performed so as not to mar the roadway surface. If slip -form equipment is used to construct embankment curb, such equipment shall be designed specifically for the work. The slip- form machine shall be capable of producing curb equal to or better than that produced by the use of fixed forms. If the curb produced by such machines is not acceptable, the use of such machines shall be terminated. Curbs shall present a neat appearance. The finish normally associated with the use of slip- form curb placing machines, including the use of moveable forms, will be considered as acceptable for the finishing of concrete embankment curb. When bituminous material is being applied to the adjacent roadway, curbs shall be protected so that they are not spattered or discolored. Embankment curb shall be cured by the application of liquid membrane- forming compound. The time at which it is to be applied and the rate of application shall be approved by the Engineer. 916- 4 Method of Measurement: Embankment curb will be measured by the linear foot of curb placed. Lengths occupied by spillway inlets will be excluded from the measurement. 916- 5 Basis of Payment: The accepted quantities of embankment curb, measured as provided above, will be paid for at the contract unit price per linear foot, complete in place. TABLE OF CONTENTS INDEX 1095 SECTION 917 EMBANKMENT SPILLWAYS, EMBANKMENT DOWN - DRAINS, INLETS AND OUTLETS: 917- 1 Description: The work under this section shall consist of furnishing all materials and constructing embankment spillways, embankment down- drains, inlets and outlets at the locations designated on the project plans a nd in accordance with the details shown on the plans and the requirements of these specifications. 917- 2 Materials: Certificates of Compliance conforming to the requirements of Subsection
106.05of the specifications shall be submitted
Concrete shall be Class B Portland cement concrete conforming to the requirements of Section 1006 of the specifications. Welded wire fabric and wire ties shall conform to the requirements of Section 1003 of the specifications. Steel bars for reinforcing, anchor stakes and t rash racks shall conform to the requirements of Section 1003 of the specifications. Miscellaneous structural steel shall conform to the applicable requirements of Section 1004 of the specifications. Corrugated metal pipe shall conform to the requirements of Section 1010 of the specifications and shall be fabricated with circumferential corrugations. Preformed bituminous joint filler shall conform to the requirements of Subsection 1011- 6.01 of the specifications. 917- 3 Construction Requirements: 917- 3.01 Gen eral: Embankment slopes and existing ground at outlets shall be excavated in reasonably close conformity to the lines, and grades shown on the plans or established by the Engineer. Backfill shall be placed and compacted in accorda nce with the requirements of Subsection 203- 10 of the specifications for embankment. TABLE OF CONTENTS INDEX 1096 917- 3.02 Concrete: Concrete spillways, inlets and outlets shall be constructed in accordance with the requirements of Section 601 of the specifications. Reinforcing with wire mesh or steel bars where shown on the plans shall be placed in accordance with the requirements of Section 605 of the specifications. Concrete surfaces shall be protected from discoloration. Preformed bituminous joint material shall be placed around t imber guardrail posts imbedded in concrete. 917- 3.03 Metal: Each separate down- drain installation shall be assembled from one type of pipe only. Steel and aluminum shall not be used in the same installation. Corrugated metal pipe utilized in construction of down- drains shall be installed in accordance with the applicable requirements of Section 501 of the specifications. 917- 4 Method of Measurement: 917- 4.01 Embankment Spillways and Embankment Down - Drains: Embankment spillways and embankment down- drains will be measured by the linear foot along the slope at the center line of the spillway and along the metal down- drain parallel to the center line of the pipe. 917- 4.02 Inlets and Outlets : Inlets and outlets will be measured as a unit for each installation of the type specified. Trash racks wi ll not be measured for separate payment, but will be considered as included in the price bid for inlets. 917- 5 Basis of Payment: The accepted quantities of embankment spillways, embankment down- drains, inlets and outlets, measured as provided above, will be paid for at the contract unit price, complete in place, including excavating and backfilling. TABLE OF CONTENTS INDEX