Project_Specifications.pdf

Road Grading 2015

808 - WORK AREA MANAGEMENT (3/08)

1. DESCRIPTION

This Section establishes Contractor responsibilities for traffic control and equipment requirements in work areas.

2. REQUIREMENTS

a. Traffic Conditions - Roads other than those listed for work under Section 835 shall be open to traffic with not more than two (2) hours maximum delay time unless otherwise provided in Special Project Specifications.

b. Work which interferes with use of traveled roadways shall not be initiated or performed until a plan for satisfactory handling of traffic has been approved by the Government.

c. Traffic Control Devices

1. The Contractor shall provide signs and other devices complying with National Standards as contained in Part VI of the latest edition of the Manual of Uniform Traffic Control Devices (MUTCD). Traffic control for occupied work areas shall be in accordance with MUTCD specifications. All signs and devices remain the property of the Contractor.

2. Traffic devices shall be kept current with maintenance operation and removed upon its completion.

3. Traffic approaching the work zone from either direction and side accesses open to travel within the work zone shall be warned by signing.

4. Required signs may be mounted on portable or temporary mountings. Standard MUTCD shapes, colors, sizes, and legends shall be used.

5. Hazards incidental to the work within or on the traveled way, shoulders, or turnouts shall be marked with hazard identification markers, illuminated beacons, and other MUTCD devices to safely guide road users through the area. Work segments not completed on a daily basis shall be marked appropriately for night travel. Contractor shall obtain authorization before commencing work at night.

6. Advisory speed plates may be used to control traffic through the work area.

d. Flaggers - Properly equipped flag person(s) shall be provided where the traffic is required to stop before proceeding. Traffic shall be stopped in locations which provide width enough for passage of traffic and reasonable protection for vehicles. When flag control is used, advance warning signs are required.

e. Contractor's Equipment

1. All vehicles and machinery operating on or from the traveled way or road shoulder shall have flashing lights, strobes, or rotary beacons operated continuously while work is in progress. Truck headlights shall be on while operating. Back-up horns shall be required on all self-propelled equipment in excess of 10,000 lbs. gross weight.

2. Vehicles and machinery not currently used in the maintenance operation shall be parked off the traveled way at approved locations to minimize interference with normal use.

3. MEASUREMENT AND PAYMENT

No separate measurement or payment will be made for meeting requirements of this Section. All work and materials shall be incidental to paid work in this contract.

811 BLADING (3/11)

a. This work consists of surface grading native or aggregate roadbed to a condition to facilitate traffic and provide proper drainage. Grading includes shaping the crown or slope of traveled way, pulling ditches, berms, and drainage dips in accordance with this specification. Compaction is required when ordered.

2. MAINTENANCE REQUIREMENTS

a. Timing

Surface grading shall be performed during the contract period as ordered by the Government.

b. General

1. The existing traveled way and shoulders, including turnouts unless otherwise ordered, shall be graded and shaped to produce a surface which is uniform, consistent to grade, and crowned or cross-sloped as indicated by the character of the existing surface unless otherwise shown in the Road Listing, to at least one half inch (1/2") per foot of width, but not more than three quarter inch (3/4") per foot of width. Surfacing materials shall be thoroughly loosened to no less than 2 inch depth or the depth of potholes, wheel ruts or washboards. Scarification to facilitate cutting to the full depth of potholes or corrugations may be elected by the Contractor but will be considered incidental to blading. Scarification shall not go deep enough to cause contamination of the surfacing.

2. When Grading with water is ordered, the Contractor shall apply water during grading to prevent segregation and facilitate compaction. Suitable and adequate water sources and use restrictions will be designated by the Government. If the Contractor elects to provide water from other than designated sources, the Contractor shall be responsible for obtaining the right to use the water including any costs for royalities involved.

3. Existing native, rock or aggregate surfaced drainage dips shall be shaped incidental to blading to divert surface runoff to existing outlet devices, ditches and discharge locations.

4. The Contractor shall establish a grading pattern which provides a uniform driving surface, retains the surfacing on the roadbed and provides a thorough mixing of the materials within the completed surface width.

Upon final grading, no disturbed rock shall protrude more than three (3) inches above the adjacent surface unless otherwise provided in the contract. Material not meeting this dimension shall be removed and placed outside the roadbed so as not to obstruct drainageways or structures. This material may be scattered off the roadbed if there is free drainage. Oversize material shall not be permitted to enter into streams, lakes, meadows, or any watercourse.

5. Surface grading operations shall not extend more than two (2) miles at one time per machine. At the end of each workday, that days work shall be completed to the point that the road is passable to traffic.

c. Routine Blading

Roadbed width in excess of the dimensions shown shall be shaped only as needed to provide drainage away from the traveled way. Established grasses and other vegetation shall not be removed from the excess width except as incidental to providing drainage or unless otherwise provided in the contract.

d. Compaction

Unless Compaction Method B is included in the Road Listing, all traveled ways requiring compaction shall be compacted by Method A. Compaction shall commence immediately following blading.

Compaction methods are:

1. Compaction Method A: By breaking track while operating equipment on the traveled way.

2. Compaction Method B: 8-10 ton pneumatic, steel or equivalent vibrating roller, operated to cover the full width two (2) times.

e. Intrusions

Where the minimum width of 12 feet is not available, the Contractor will construct berms where ordered and marked on the ground. Material to provide berms will come from sources designated by the Government.

f. Undercutting

Roadway backslope and ditches shall not be undercut.

g. Intersections

1. At intersections, the roadbeds of side roads which are not closed or restricted from vehicular use shall be bladed for an adequate distance, not to exceed 50 feet, to assure proper blending of the two riding surfaces.

h. Cleaning of Structures

Materials resulting from work under this Section shall not be allowed to remain on or in structures, such as bridges, culverts, cattleguards, drainage dips, aprons, or flumes.

i. Berms

1. Existing berms shall be maintained to the condition of adjacent segments when ordered by the Government.

2. No new berms shall be established unless ordered by the Government.

3. Existing berms shall be removed when ordered by the Government.

j. Scarification

This work shall consist of breaking up and pulverizing old or damaged chip seal and dust oil surfaces to a maximum dimension of 3 inches, or to facilitate cutting to the full depth of potholes, wheel ruts or washboards.

Scarification shall not penetrate the aggregate base to the subgrade. Where aggregate base is 3 inches or greater in depth, the minimum scarification depth shall be 3 inches.

k. Ditches

All ditches shall be maintained unless otherwise staked. Ditch cleaning shall include removal of slough material, debris, or minor slide material which might obstruct water flow in the ditch line.

3. MEASUREMENT

a. Measurement under this Section will be made by the total number of units for each item listed and completed and accepted.

b. Measurement for grading will be by mile measured along the centerline of the roadway (see quantity measurement terms). Measurement will be measured to the nearest one-tenth (0.1) mile.

c. Each intersection bladed under 2.g. will be equivalent to one-tenth (0.1) mile; however, when the intersecting side road is scheduled for subsequent blading under this Section, no measurement will be made.

d. Berm maintained or established will be measured by linear foot.

4. PAYMENT

a. The quantities measured and accepted will be paid for at the agreed contract price.

b. Payment will be made under:

Pay Item Pay Unit

811(01) Blading Surfaced Roads Mile 811(02) Blading Native and Pit Run Roads Mile

811(05) Compaction – Method B Mile

831 DITCH MAINTENANCE (3/08)

This Section provides for routine maintenance of various types of ditches to provide a waterway which is unobstructed, as shown on the road listing or marked on the ground. Drainage ditch maintenance is limited to materials contained within the ditch below the elevation of the adjacent edge of the traveled way or shoulder.

2. MAINTENANCE REQUIREMENTS

a. During ditch maintenance care shall be taken to retain existing low growing vegetative cover (primarily grasses and forbs) that does not unduly restrict the flow of water.

b. Ditches shall be maintained by removing rock, soil, wood, and other materials. Upon completion the maintained ditch shall be of the same character as abutting segments that were not required to be maintained.

c. Backslopes shall not be undercut by removal operations.

d. Suitable material up to three (3) inches in greatest dimension removed from the ditches may be blended into existing native road surface and shoulder or placed in designated berms.

e. Material from ditch cleaning operations shall not be blended into or bladed across aggregate surfaced roads nor bladed onto or across bituminous surfaced roads.

f. Material in excess of 2(d) or subject to 2(e) will be ordered hauled to a designated waste area under Section 832. Excess materials temporarily stored on the ditch slope or edge of the shoulder shall be removed daily.

g. Limbs and wood chunks in excess of one (1) foot in length or three (3) inches in diameter shall be removed from ditches and placed outside the roadway.

h. Paved surfaces shall be cleaned of all materials resulting from Contractor's ditch maintenance work. Paved surface cleaning shall be in accordance with Section 815.

i. Lead-off ditches shall be shaped to drain away from the traveled way.

3. MEASUREMENT

a. Drainage ditch maintenance will be measured to the nearest one-tenth (0.1) mile. Segments of less than one-tenth (0.1) mile will be counted as a full one-tenth (0.1) mile. Lead off ditches shall be measured by the number of ditches completed.

b. Ordered haul of excess material will be measured and paid under Section 832.

c. Surface cleaning shall be considered incidental to ditch cleaning and will not be paid for separately.

4. PAYMENT

a. The accepted quantity will be paid for at the agreed contract price.

b. Payment will be made under:

Pay Item Pay Unit

831(1) Clean and Reshape Drainage Ditch Ditch Mile 831(2) Clean and Reshape Lead off Ditch Each

881 MOBILIZATION (7/91)

This Section consists of one or more mobilizations of personnel, equipment, supplies, and incidentals to the project site, or sites listed in the Schedule of Items.

2. MEASUREMENT

When the contract establishes separate work periods within the contract time any additional mobilization included as a Bid Item will be retained until the actual work period.

3. PAYMENT

a. Progress payments will be made on the basis of the Bid Items contained in the Schedule of Items as follows:

1. When five (5) percent of the estimated contract amount in the work period is earned, fifty (50) percent of the amount of mobilization will be paid.

2. When twenty-five (25) percent of the estimated contract amount in the work period is earned, one hundred (100) percent of the amount for mobilization will be paid.

3. Any portion of the mobilization item in excess of 10 percent of the original contract amount will be paid after final acceptance of the project.

4. The contract amount for mobilization shall include full compensation for furnishing all labor, materials, tools, equipment and incidentals involved in mobilization.

b. Payment will be made under:

Pay Item Pay Unit

881(01) Mobilization Lump Sum