AG03K0S160006SPS.pdf

SPECIAL PROJECT SPECIFICATION

Section 904 – Maintenance for Traffic

904.01 General – Add the following:

Contractor’s access to the project over existing national forest system roads and trails to the project will be limited to the modes of transportation allowed in the current Lewis and Clark National Forest, Jefferson Division, travel plan map. ATV vehicles under a width of 50 inches shall be allowed to use the Lucy Park trail. Trail excavators are not considered transportation vehicles and are allowed for construction. Trail excavators and construction equipment that can be operated within the confines of the trailbed are authorized.

Section 906 – Measurement and Payment

906.02 Determination of Quantities – Delete the fourth paragraph and replace with the following:

Measure structures according to neat lines SHOWN ON THE DRAWINGS or as altered by the CO in writing to fit field conditions. Make measurements along the centerline and parallel to the specified grade or foundation, except for pay item 911 and 912, which will be measured horizontally along the centerline.

Section 907 – Quality Assurance and Quantity Measurement

Description

907.01 Work – Add the following:

Work will also include providing noxious weed control.

Construction

907.02 Certification and Measurements – Add the following:

To mitigate the anticipated impacts of spreading noxious weed species, the following precautions will be used:

All equipment and vehicles to be used at the job site will be steam cleaned and free of noxious weeds and their seeds prior to entrance onto Federal lands. The restriction will include equipment and vehicles intended for off-road as well as on-road use, whether they are owned, leased, or borrowed by the Contractor or any subcontractor.

Cleaning will consist of the removal of all dirt, grease, debris and materials that may harbor noxious weeds and their seeds. Cleaning will occur off Federal lands.

Equipment, materials and vehicles will be visually inspected by the Engineer or other designated Forest Service official at a location agreed to by the Engineer and the Contractor in advance of delivery to the job site. Delivery is expected to proceed directly to the job site.

Equipment that leaves the job site will need to be re-inspected before being allowed to return.

Section 908 – Staking, Flagging, and Cleanup

908.02 General – First paragraph, add the following:

In addition to the provided survey staked P Line (preliminary line), Forest Service will also provide construction slope stakes for the Switchback in the vicinity of L-Line Sta. 113+22, and in the vicinity of L-Line Sta. 0+07. The Forest Service shall provide start location and end location stakes for pay items 912(05), 941(02), 952(02), 952(05), and 954(02). Contractor will be responsible for providing a grade setter and perpetuating the Forest Service’s construction staking by referencing or other means as required.

The L-Line is the final location line, and the P-Line with Field reference stakes is the preliminary line.

The L-Line is located on the P-Line except for locations where the Forest Service has provided offset stakes.

Contractor shall preserve all survey stakes, by off-setting and referencing, during the construction period.

Nearing project completion and approval by the CO, Contractor will collect and remove stakes from the project.

Section 912 – Excavation and Embankment

912.01 Work – Delete the first sentence in the second paragraph, and replace with the following:

Includes excavation, embankment, and backfill construction required to shape and finish the trailbed, ditches, leadout ditches, backslopes, fill slopes, grade reversals, trail passing sections, and turnouts.

912.03 Use and Disposal of Excavated Material. – Delete the third paragraph, and replace with the following:

Place excess and unsuitable excavation on the fill slope of the trail in locations SHOWN ON THE DRAWINGS or as directed by the CO. Do not obstruct drainage and spread to a depth not exceeding 12”.

Spread the material in a uniform fashion. This includes any material removed in the grubbing operation and deposited in the same area.

912.04 Trailway Excavation and Embankment. – Add the following:

When constructing trail on an existing road, maintain outslope on the trail. Ensure water can exit the trail, not allowing berms or other drainage blockages to exist. Only clear and grub as shown in the drawings, leaving vegetation on the section of road not undergoing trail construction.

Payment

912.01 Basis – Add the following under pay items:

PAY ITEM PAY UNIT

912(16) Excavation Within Existing Road EA

Section 914 – Switchbacks

914.03 Excavation and Embankment – Add the following:

When transporting material for construction of switch backs, move the material longitudinally on the trail so as to not destroy vegetation inside the radius of the horizontal turn.

Contractor will notify the CO a reasonable time in advance of the construction of the switchback.

Construction of the switchback will not begin until construction equipment in on site and a Government representative is present.

Section 941 – Aggregate Surfacing and Base Course

Materials

941.02 Requirements – Delete the third paragraph and replace with the following:

Obtain materials from commercial sources or other sources approved by the CO in writing.

941.06 Spreading and Compacting – Delete the second sentence in the first paragraph and replace with the following:

The maximum thickness of any one layer shall be 4”.

Section 952 – Sign, Post, and Cairn Installation

Payment

912.01 Basis – Add the following under pay items:

PAY ITEM PAY UNIT

912(10) Treated Posts, Length ____ ft, Type _____ EA

Section 954 – Obliteration of Abandoned Trailways

954.02 General. – Delete this paragraph and replace with the following:

Obliterate trailways in locations SHOWN ON THE DRAWINGS or DESIGNATED ON THE GROUND.

Where available, transplant live vegetative material from the trail surface and adjacent areas into the treated trail prism. Transplanted material shall be conserved with root mass and surrounding soil whenever possible. Mix sod and vegetation into the new soil surface or transfer islands or plugs of native vegetation to encourage establishment of grasses and forbs.

954.04 Drainage Structures. – Delete this paragraph:

954.06 Scarify. . – Delete this paragraph and replace with the following:

Scarify the trail to promote the establishment of vegetation at locations SHOWN ON THE DRAWINGS or DESIGNATED ON THE GROUND. Scarification is defined as breaking up the compacted soil to a minimum depth of 18 to 24 inches.