TR_IDIQ_Att5_Supplemental_Specs.docx

Attachment 5

Supplemental Specifications to

Region 6 Trail Specifications (7/05)

Section 901- Abbreviations, Acronyms, and Terms

901.01 (b) Abbreviations and Acronyms pcf Change square to cubic

905 Control of Material Add the following:

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 execution 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.

912.10 Basis

Add the following PAY ITEMS / PAY UNITS:

915.01 Work.

At the end of the sentence add:

trees and logs.

915.08 Drainage.

In the first sentence, after “drainage”, add:

in accordance with Section 991

In the second sentence, change 923 to 991.07

915.11 Switchbacks.

Change 914 to 990.

915.12 Waterbars.

Change 922 to 991.

915.13 Turnpikes.

Change 913 to 989.

915.15 Reshaping and Finishing Trailbed and Backslopes

Add the following section:

915.15A Road to Trail Conversion This work consists of restoring cross drainage and relocating trail tread within the existing road bed as shown on drawing 915-3. Includes clearing, removing slough and berm, borrow, filling ruts and troughs, reshaping backslopes, excavation, reshaping trail tread, restoring drainage and other trail structures, constructing check dams, and removing protruding rocks, roots, stumps, slough, and berms.

915.17 Basis

Add the following PAY UNITS:

915 (05) Trail Restoration mi

933.08 Pinned Stairway

In the second sentence, change ¾” to 1”

941.01 Work

Add:

Add the following Section:

Section 917 – Trail Construction

Description

917.01 Work. Work consists of constructing trail as marked on the ground in accordance with Sections 911, 912, and 914.

Materials

917.02 Requirements. Use materials specified in Sections 911, 912 and 914.

Construction

Construct trail as shown on drawings for Sections 911, 912 and 914.

Section 937 - Rock Masonry Construction

Description

937.01 Work. Work consists of furnishing and constructing rock masonry structures including stone masonry walkways, rock culverts, rock retaining walls, and stone veneer. Work shall include excavation and backfill.

Materials

937.02 Requirements. Use materials meeting the requirements of the following subsections:

905 – Control of Materials

Masonry cement shall comply with ASTM C-91 and ASTM C-270, Type N, S, or M.

Construction

Do not mix brands or types.

All masonry work shall be uniform and built to dimensions, and pattern as indicated on the drawings.

Joints shall be 3/8" min to 1 ¼” max width, tooled concave.

All rocks shall be "buttered" on all contact surfaces with mortar.

All exposed wall surfaces shall be kept clean and free of mortar or concrete splotches.

No placing of masonry shall be done in freezing weather.

In hot or dry weather, the masonry shall be protected from the sun and shall be kept wet for a period of three days after completion.

Masonry Cement - Shall be delivered in unbroken bags and stored above ground under cover.

Add the following Section:

Section 938 – Treated Timber Bridge

Description

938.01 Work. The work consists of constructing treated timber bridges, including sills, bulkheads, rails, curbs, decking, excavation, backfill, and approach fills as SHOWN ON THE DRAWINGS and DESIGNATED ON THE GROUND.

Materials

938.02 Requirements. Use materials meeting the requirements of Section 962.

Construction

938.03 General. Construct treated timber bridges at location SHOWN ON THE DRAWINGS or DESIGNATED ON THE GROUND. Pre-drill holes for fasteners when necessary to prevent splitting. Use oversized steel washers with bolts and as SHOWN ON THE DRAWINGS.

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

938.05 Sills. Construct sills at each end of the span AS SHOWN ON DRAWINGS and in the location staked on the ground.

938.06 Stringers. Connect blocking, stringers, and rail posts AS SHOWN ON DRAWINGS.

938.07 Decking. Decking shall be attached AS SHOWN ON DRAWINGS.

938.08 Curbs. Curbing is required on both sides when called for in Schedule of Items. Install as SHOWN ON DRAWINGS.

931.09 Handrails. Railing is required when called for in Schedule of Items. Rails shall be spliced with a diagonal butt joint at a post location. Use 4x4 rail posts, 2x6 railing cap, 2x4 railing. Connect blocking, stringers, and rail posts as SHOWN ON DRAWINGS. Finish handrails and posts smooth and free from splinters and sharp projections.

938.10 Approach Fills. Construct the approach fills with compacted suitable material.

Measurement

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

Payment

938.12 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

938 (01) Treated Timber Bridge EA

938 (02) Treated Timber Bridge LS

938 (03) Treated Timber Bridge LF

938 (04) Approach Fills LF

Section 945 –Hardening with Interlocking Articulated Concrete Block system (ACB)

Description

945.01 Work. The work consists of furnishing and installing ACB units, including excavation, backfilling, and geosynthetics. Install in accordance with the manufacturer’s instructions. ACB is NOT intended for slope stabilization.

Materials

945.02 Requirements. Use materials meeting the requirements of Sections 961, 962, and 964.

Construction

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

945.04 Site Preparation. All slopes and the ground must be stable before ACB can be installed. Ground shall be well compacted. ACB system is not intended for installation on slopes steeper than 2H:1V.

Before placing either the concrete block system or the under-laying filter fabric, the ground shall be inspected to insure that it is free from obstructions, such as tree roots projecting stones or other foreign matter. Voids or soft areas should be filled with suitable material and well compacted. Although some variation in contour will be permitted, no sudden changes in level can be accepted. The maximum difference in level between any cuts will be 1.5”. Hand dress where necessary.

945.05 Installation. The entire perimeter of the cellular concrete block system shall be turned into, and buried beneath the adjacent ground level to a depth of not less than three (3) feet, or as specified in the Task Order. Any junction with other structures shall be made as noted on drawings, but shall always provide a permanent soil-tight joint to prevent the migration of soil between the structures, grouting if necessary. Protrusions such as culverts, piles, or trees may be facilitated by hand placing blocks around the obstruction and grouting as required.

Penetrations through the block system may be made by omitting sufficient blocks to provide space for the penetration. It will be necessary to provide extra filter fabric in the form of a tightly fitting flange around the pipe or device so that it may be overlaid with the erosion control system filter fabric. (Minimum overlap 18".) Any voids around the penetration should be filled with grout and floated smooth.

If specified in Task Order, dress installation with top soil and apply fertilizer and seed with native grass as approved by the Contracting Officer. If the Task Order does not indicate that revegetation is required, then dress with suitable soil as approved by the Contracting Officer.

945.06 Geotextile Specifications. Filter Fabric: The cellular concrete block system shall be laid over a plastic filter fabric if called for in the Task Order, as specified 964.

945.07 Trenching.

Install anchor trenches (key, toe, and lateral trench protection) as required for a stable installation. See manufacture’s installation instructions.

Upon completion of installation, all key, toe, and lateral trenches should be backfilled.

Measurement

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

Payment

945.09 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

945 (01) Hardening with ACB, Type___ SF

945 (02) Hardening with ACB, Type___ LF

954.10 Basis

Add the following PAY UNIT:

954 (09) Obliteration mi

983.04 Basis

983 (02) Danger Tree Removal mi

984.04 Basis

Add the following PAY UNIT:

984 (02) Loose Rock Removal mi

985.04 Basis

Add the following PAY UNIT:

985 (02) Rock and Root Removal mi

988.04 Basis

Add the following PAY UNIT:

988 (03) Slough and Berm Removal mi

990.04 Basis

990 (03) Maintain Switchbacks mi

991.10 Basis

991 (07) Maintain Grade Dips mi

Section 992 – Rock Retaining Wall

992.04 Method Change meter to foot

992.05 Basis

PAY ITEM

992(01) Rock Retaining Wall Change LF to SF

ATTACHMENT 5