Special Project Specifications pinnacle.pdf

Supplemental Specifications to

Region 6 Trail Specifications (7/05)

903.01 Intent

Add the following:

Any mechanized equipment used on the project shall have a track width of 48” or less. The use of skid-steer loaders is not permitted.

905 Control of Material

Rock Source – Commercial source shall be approved by the CO. Submit rock samples for CO’s approval.

906.02 Determination of Quantities

Unless otherwise specified, measure when the work is in place, complete, and accepted.

Section 906 Measurement and Payment

906.06 Scope of Payment. Payment for all contract work is provided, either directly or indirectly, under the pay items shown in the bid schedule.

(a) Direct payment. Payment is provided directly under a pay item shown in the bid schedule when one of the following applies:

(1) The work is measured in the Measurement Subsection of the Section ordering the work, and the bid schedule contains a pay item for the work from the Section ordering the work.

(2) The Measurement Subsection, of the Section ordering the work, references another Section for measuring the work and the bid schedule contains a pay item for the work from the referenced Section.

(b) Indirect payment. Work for which direct payment is not provided is a subsidiary obligation of the Contractor. Payment for such work is indirectly included under other pay items shown in the bid schedule. This includes instances when the Section ordering the work references another Section for performing the work and the work is not referenced in the Measurement Subsection of the Section ordering the work.

Compensation provided by the pay items included in the contract bid schedule is full payment for performing all contract work in a complete and acceptable manner. All risk, loss, damage, or expense arising out of the nature or prosecution of the work is included in the compensation provided by the contract pay items.

Work measured and paid for under one pay item will not be paid for under any other pay item.

Limit pay quantities to the quantities staked, ordered, or otherwise authorized before performing the work.

Payment will be made for the actual quantities of work performed and accepted or material furnished according to the contract. No payment will be made for work performed in excess of that staked, ordered, or otherwise authorized.

908.02 General

In the first sentence of the first paragraph, delete:

“construction stakes or”.

Delete the last sentence of the first paragraph and add:

The flagged line constitutes the field control except that the centerline of the trail can vary 25’ up or down slope from the flagged line when approved by the CO.

911.02 Clearing Limits

Delete:

the remainder of the first sentence after “or”.

912.01 Work

Delete the second paragraph and add:

Includes excavation, embankment, and backfill construction required to shape and finish the trailbed, backslopes, and fill slopes. Also includes excavation and embankment work required to construct shallow stream fords and gully crossings and switchbacks.

912.03 Use and Disposal of Excavated Material

In the third paragraph, the second sentence, delete:

The remainder of the sentence after “spread” and add “AS SHOWN ON THE DRAWINGS.”.

Section 921 Replace the entire section with the following:

Arch Pipe Culverts

Description

921.01 Work. Work consists of furnishing and installing arch pipe culverts, including excavation and backfill, selecting and hauling of rock materials, and constructing headwalls.

Materials

921.02 Requirements. Use materials meeting the requirements of the following sections:

961—Rock, Grid Pavement Units, and Aggregate 962—Material for Timber Structures 963—Drainage Pipe – Supplemental Spec. Section 963.09 Corrugated Plastic Arch Culvert 964—Geosynthetics

Construction

921.03 Excavation and Embankment. Perform excavation and embankment in accordance with Section 912.

921.04 Placement. Place culverts to provide for unobstructed inlet and outlet flow. Remove logs, debris, soil, rock, and other obstructions above and below the culvert that would impede flow into the culvert or away from the trailway. Minimize disturbance to streambeds.

921.05 Arch Pipe Culverts. Install arch pipe culverts at the locations SHOWN ON THE DRAWINGS or as DESIGNATED ON THE GROUND BY THE CO.

(a) Placing. Place culverts at stream crossings on the natural stream banks or as DESIGNATED ON THE

GROUND BY THE CO.

(b) Foundation. Excavate and remove all unsuitable material and rocks over 3 inches for the arch pipe culvert footings.

Firmly embed lower arch pipe culvert footings on stable foundation of undisturbed or compacted soil.

921.06 Backfilling Culverts. Backfill and compact in lifts around the arch culvert’s exterior chamber footing with suitable material that is free of rocks over 3 inches. Provide for the cover height as SHOWN ON THE DRAWINGS. Place material in 6’ lifts and compact until visual displacement ceases.

921.07 Headwalls. Install headwalls and nonwoven geotextile fabric between the backfill material and the rock headwall at the locations SHOWN ON THE DRAWINGS or as DESIGNATED ON THE GROUND

BY THE CO.

Provide a compacted bench a minimum of 6 inches below the existing ground for the foundation of the headwall.

Select rocks that have a general rectangular shape with flat top and bottom faces. Place the largest rocks on the bottom. Lay each rock stable on the course that supports it, interlocking with surrounding rocks. Do not break, jar, or displace rocks already set. Place the exposed face of each rock parallel to the face of the wall.

Stagger vertical joints a minimum of 4 inches horizontally from vertical joints in adjoining courses.

Measurement

921.08 Method. Measure the quantities in accordance with Section 906.

Payment

921.09 Basis. Pay for the accepted quantities in accordance with Section 906 at the contract unit price for each PAY ITEM SHOWN IN THE SCHEDULE OF ITEMS.

Make payment under:

PAY ITEM PAY UNIT

921(08) 51 inch span x 30 inch rise corrugated plastic arch culvert with headwalls ............... LF

941.01 Work

Add:

This work includes backfilling structures with crushed aggregate when suitable on-site material is not available. Backfill shall be any of the following gradations as directed by the CO:

Grade D (crusher run) Block material Chat Grade 10 Grade 57

Grade 3 Material shall conform to Tennessee Department of Transportation Specifications.

955.07 Soil Preparation

The seeding slopes 0.75:1 and steeper is not required.

Section 963-Drainage Pipe

963.09 Corrugated Plastic Arch Culvert. Use corrugated plastic pipe molded from polypropylene resin. Use StormTech, SC-740 as manufactured by Advanced Drainage Systems or equal.