J-3_HyaliteDayUseRec Trails_SpecialProjectSpecifications.pdf

Hyalite Day Use Area Rec & Trails

FOREST SERVICE

SPECIAL PROJECT SPECIFICATIONS

For

HYALITE DAY USE AREA

Rec and Trails

U.S.D.A. FOREST SERVICE

GALLATIN NATIONAL FOREST

June 2013

Included Special Project Specifications:

Number Description

- Preface

105 Control of Material 152 Government Survey and Staking 156 Public Traffic 157 Soil Erosion Control 208 Structure Excavation & Backfill for Trail Bridges 272 Geocell Abutment Stabilization 300 Miscellaneous Structures 300 Boulders 301 Aggregate Courses 400 Concrete for Minor Structures 703 Aggregate 736 Geocell 954 Obliteration and Surface Restoration

105 - Control of Material

105.02 Material Sources

Add the following before the first paragraph.

Sources have been designated for this project as follows:

Coarse Granular Backfill – Contractor Furnished – There is no available Government source for Coarse Granular Backfill for construction of the geocell abutment stabilization.

Structural Backfill and Approach Embankment – Gov’t Furnished – Suitable material shall be obtained from adjacent new trail construction as directed by CO.

Add the following to section (b) Contractor-located sources.

Prior to any pit development or use of materials, the Contractor shall provide to the CO a State certification that the pit site is free of noxious weed as listed on the "All States Noxious Weeds List”.

152 - Government Survey and Staking

The Government shall provide construction staking for the entire project. The Contractor shall provide a reasonable effort to protect Government Staking.

156 - Public Traffic

156.03_nat__us02_24_2005

156.03 Accommodating Traffic During Work.

Hyalite Day Use Area – The pavilion area shall be closed to the pulic during all working times by Forest Order.

Trails outside the Day Use Area – Maintain traffic during trail construction

157 - Soil Erosion Control

157.03_nat__us02_24_2005

157.03 General

Delete the entire subsection and replace with the following:

Prior to the start of construction, submit a written plan that provides permanent and temporary erosion control measures to minimize erosion and sedimentation during and after construction. Do not begin work until the necessary controls for that particular phase of work have been implemented. Do not modify the type, size, or location of any control. An alternate erosion control plan with all necessary permits may be submitted 30 days before intended use.

Incorporate all permanent erosion control features into the project at the earliest practicable time, as outlined in the approved plan.

When erosion control measures are not functioning as intended, immediately take corrective action.

208 - Structure Excavation and Backfill for Trail Bridge

208.11 Compaction

Each layer shall be compacted with mechanical tampers until surface deformation is no longer visible. Adjust the moisture content of the backfill material to a moisture content suitable for compaction.

272 - Geocell Abutment Stabilization

Description

272.01 This work consists of constructing geocell abutment stabilization at each abutment using a cellular confinement system such as Presto Geoweb Cellular Confinement System or Webtec TerraCell in accordance with the plans and manufacturers recommendations.

Materials

272.02 Requirements. Ensure that material conforms to specifications in the following subsections:

Granular Backfill Type (a) 703.03 Geotextile, Type II (A, B, C) 714.01 Geocell 736

Construction Requirements

272.03 General. Perform the work specified in Section 208 or 209. Use ditches, grading or similar methods to prevent surface runoff that may occur during inclement weather from ponding in the foundation excavation.

272.04 Storage and Handling of Material. During shipment and storage, wrap geotextile materials in heavy-duty protective covering. Protect the material from mud, soil, dust, debris and sunlight prior to installation.

272.05 Geotextile Installation. Place the geotextile according to Section 207. Have the surface approved by the CO prior to placing geotextile.

Sew or overlap adjacent strips a minimum of 12” at joints. Insert securing pins through both strips of overlapped geotextile at minimum intervals of 3 feet, but no closer than 2 inches to each edge, to prevent the geotextile from being displaced.

Have the installed geotextile approved by the CO prior to setting the geocells.

272.06 Geocell Installation. Furnish the CO with product literature and certification as required in Section 106.03 for review and approval 7 days prior to installation. When requested by the CO, furnish a sample of the geocell from each lot for verification testing.

Place the geocell sections directly on the prepared subgrade. Expand the geocell sections into position at the grades and lines as shown on the plans. Hold the expanded geocell sections with suitable “stretcher frames”, steel stakes driven inside selected outer cell walls, or other similar methods as allowed by the manufacturer prior to filling. Ensure that the individual cells have expanded to the minimum dimensions required by the manufacturer. If necessary field cut sections as per the manufacturer’s recommendations to the lines shown on the plans.

Connect geocell panels in accordance with the manufacturer’s recommendations.

272.07 Infill Placement. Furnish the CO with the manufacturer’s specific recommendations for backfilling 7 days prior to placement of the geocells.

Place coarse granular backfill meeting Subsection 703.03 into the expanded cells with equipment appropriate for the site conditions such as a backhoe or a front-end loader. Do not drop infill material more than 3 feet to avoid damage or displacement of the cell walls.

Overfill the geocell cells and level to a minimum of 2 inches above the top of the cell walls. A front-end loader may be used to place the infill provided that it only traffics above geocell sections that have been filled and covered with the minimum 2 inches of additional material. Compact the infill material with a vibratory plate compacter. Operate compaction equipment over the full width of the geocell. Make at least three complete passes or until visible deformation of the infill ceases. Grade the surface to be ½ inch above the top of the cells. Ensure that the cell walls are not exposed after fine grading is completed.

Use the geocell manufacturer’s specific recommendations for backfilling if they are more stringent than stated above.

272.08 Acceptance. Geotextile will be evaluated under Subsections 106.02 and 714.01.

Material for geocell will be evaluated under Subsections 106.2 and 106.03.

Granular backfill material will be evaluated under Section 106.02 and 106.04.

Measurement

272.09 Method. Measure the items listed in the bid schedule according to Subsection 109.02 and the following.

Measure geocell by the square yard in place, exclusive of wastage.

Payment

272.10 Basis. The accepted quantities will be paid for at the contract price per unit of measurement for the Section 272 pay items listed in the bid schedule. Payment will be full compensation for the work prescribed in this Section. See Subsection 109.05.

The cost for furnishing and placing the granular backfill required in Sections 207, 208, and 209 for geocell infill is incidental to this pay item and no separate payment will be made.

The cost for furnishing and placing geotextile for the geocell installation is incidental to this pay item and no separate payment will be made.

300 - MISCELLANEOUS STRUCTURES

PART I - GENERAL

1.1 SCOPE OF WORK

Work specified under this Section includes construction or furnishing and installation of Site ID Sign, Bulletin Board, Picnic Spaces, Fire Ring Pads, Gravel Paths, Picnic Tables, Type II Benches, Fire Rings, Tire Stops, and Timber Edging.

PART II - MATERIALS AND EXECUTION

2.1 GENERAL

Materials shall be as specified on the plans and herein or approved by CO. Install structures at locations where staked on the ground by the CO. Staked locations may deviate from those shown on the plans.

2.2 EXCAVATION

Excavation shall be unclassified. Perform excavation as needed to complete construction as shown and specified. Attempt to balance cut and fill. Maximum lift height in fill areas shall be 8 inches. Compact fill areas by running equipment uniformly over the entire surface. Hand tamp backfill around posts.

2.3 REC & TRAIL SIGNS

Install as shown on the plans. Sign panels shall be supplied by the Government.

2.4 BULLETIN BOARD

Install as directed by the CO.

2.5 FIRE RING PADS, AND GRAVEL/ASPHALT PATH COMPACTION

Fire Ring Pads. Construct Fire Ring Pads at each new fire ring installed at as shown on the plans.

Grade and compact subgrade such that no stone or debris protrudes more than 1 inch above the final subgrade surface. Construct surface with 2-inch thick compacted layer of ½-Inch minus Gravel as specified in this Section.

Compaction. Compact aggregate over the entire surface with the minimum passes specified below until visual displacement ceases and a smooth even surface is produced.

A. Three passes with a walk behind vibratory 24” plate, minimum 300 pound tamper.

B. Three passes with vibrating steel drum, self-propelled walk behind roller. One drum, minimum 1,000 pounds, 2 feet wide.

C. Two passes with vibrating steel drum, self-propelled riding roller. Two drum, minimum

4,000 pounds, 3 feet wide.

D. Equivalent compaction method approved by the CO.

2.6 PICNIC TABLES

A. Install picnic tables as shown as directed by the CO

2.7 TIRE STOPS

Fabricate and install as shown on the plans. Concrete and reinforcing steel shall conform to Section 03305 - CONCRETE.

2.8 TIMBER EDGING FOR ACCESSIBLE TRAIL

Install as shown and noted on the plans.

2.10 TRAFFIC RESTRICTION BARRIER

Furnish and install as shown and described in the Plans.

PART III - MEASUREMENT AND PAYMENT

Measurement shall be in accordance with Section 109. Items will be paid at the contract unit price for the quantities installed and accepted.

******END OF SECTION******

300 -BOULDERS

PART 1 -GENERAL

1.1 DESCRIPTION

This work shall consist of salvaging and reinstalling partially buried boulders and furnishing and installing partially buried boulders.

PART II - PRODUCTS

2.1 BOULDERS

Boulders shall have 3 feet minimum diameter in all directions, shall be of sound, durable rock type, and shall have naturally weathered surfaces (no quarry stone). Boulders shall be marked by the CO within 2 miles of the project site, largely along the Hyalite Road. The Contractor shall transport boulders to the site.

PART III - EXECUTION

3.1 PROTECTION OF TREES AND VEGETATION

Excavation and placing boulders shall be done in such a manner that existing trees and shrubs are not unnecessarily damaged.

3.2 BOULDER INSTALLATION

A. Locations for placement of boulders will be staked on the ground by the Engineer.

B. Bury boulders so 1/3 of the rock height is buried below finish grade as shown on the plans unless otherwise shown on the plans.

3.3 CLEANUP AND EXCESS MATERIAL

After the boulders have been placed, rake the disturbed area to remove debris and blend into surrounding grade. Backfill holes when obtaining boulders from any designated sources with topsoil to grade.

3.4 MEASUREMENT AND PAYMENT

The accepted quantities will be paid for at the contract unit prices for the Pay Items shown in the

SCHEDULE OF ITEMS.

301 - Aggregate Courses

301.01 Work.

Add the following:

Work includes producing aggregate by pit-run, grid rolling, screening, or crushing methods, or placing Government-furnished aggregate. Work may include additive mineral filler, or binder.

301.02 Material.

Add the following:

Bentonite 725.30 Calcium Chloride Flake 725.02 Lime 725.03 Lignon Sulfonate 725.20 Magnesium Chloride Brine or Calcium Chloride Liquid 725.02

301.03 General.

Request approval in writing of the roadbed before placing aggregate.

If the aggregate is produced and stockpiled before placement, handle and stockpiled according to Section 320. Establish stockpile sites at locations approved. Clear and grub stockpile sites according to Section 201.

301.04 Mixing and Spreading.

Delete the first two sentences of the first paragraph and add the following:

Adjust the moisture content to obtain a uniform mixture with a moisture content within 2 percent of the optimum moisture content. Spread the aggregate in a uniform layer, with no segregation of size, and to a loose depth that will provide the required compacted thickness.

When placing aggregate over geotextile, place aggregate in a single lift to the full depth specified.

Route and distribute hauling and leveling equipment over the width and length of each layer.

301.05 Compacting

Delete the first and third paragraphs and add the following:

Compact the aggregate using one of the following methods as specified:

(a) Compaction A. Compact the aggregate by operating spreading and hauling equipment over the full width of each aggregate layer.

(b) Compaction B. Moisten or dry the aggregate to a uniform moisture content between 5 and 7 percent based on total dry weight of the mixture. Operate rollers to remove all visible displacement.

(c) Compaction C. Compact each layer of aggregate to a density of at least 95 per-cent of the maximum density, as determined by AASHTO T 99, method C or D.

(1) Compaction C-1. Compact each layer of aggregate to a density of at least 96 percent of the maximum density, as determined by the Modified Marshall Hammer Compaction Method (available upon request from USDA Forest Service, Regional Materials Engineering Center, P.O.

Box 7669, Missoula, MT 59807).

(d) Compaction D. Compact each layer of aggregate to a density of at least 95 per-cent of the maximum density, as determined by AASHTO T 180, method C or D.

(1) Compaction D-1. Compact each layer of aggregate to a density of at least 100 percent of the maximum density as determined by the Modified Marshall Hammer Compaction Method (available upon request from USDA Forest Service, Regional Materials Engineering Center, P.O.

Box 7669, Missoula, MT 59807).

(e) Compaction E. Operate rollers and compact as specified in Subsection 204.11(a).

For all compaction methods, blade the surface of each layer during the compaction operations to remove irregularities and produce a smooth, even surface. When a density requirement is specified, determine the in place density and moisture content according to AASHTO T 310 or other approved test procedures.

301.06 Surface Tolerance.

Add the following:

Thickness and Width requirements:

The maximum variation from the compacted specified thickness is ½ inch.

301.08(b) Plasticity Index.

Add the following to the first sentence: “and under 703.05(c)(1)”.

301.08 Acceptance

Delete the second paragraph and add the following:

Aggregate gradation and surface course plasticity index will be evaluated under Subsection 106.04.

Other aggregate quality properties will be evaluated under 106.02 and 106.04.

301.09 Measurement.

Add the following:

Measure aggregate compacted in place. Use the method of measurement that is DESIGNATED IN THE

SCHEDULE OF ITEMS.

301.10 Payment

Delete the following:

adjusted according to Subsection 106.05

Table 301-1 Field Density Requirements.

Table 301-1: Delete laboratory and field density requirements for base, subbase, and surfacing and replace with the following:

Material or

Product

Type of Acceptance

(Subsec.)

Characteristic Cate-gory

Test Methods Specifications

Sampling Frequency

Point of Sampling

Split Sample

Reporting Time

Base and Subbase

Measured and tested conformance (Subsection 106.04)

Moisture Density

Method C --- AASHTO T

1 per type and source of material

Source of material

Yes Before using in work Method C-1 --- R-1 Marshall “ “ “ “ Method D --- AASHTO T

Method D-1 --- R-1 Marshall “ “ “ “ Compaction ---

Method C, C- 1, D, D-1

--- AASHTO T

310 or other approved procedures

1 per 500 t In-place --- Before placing the next layer

Surfacing Measured and tested conformance (Subsection 106.04)

Moisture Density

Method C-1 --- R-1 Marshall “ “ “ Before using in work

Method D --- AASHTO T

Method D-1 --- R-1 Marshall “ “ “ “ Compaction

Method C, C- 1, D, D-1

--- AASHTO T

310 or other approved procedures

1 per 500 t In-place --- Before placing the next layer

400 - CONCRETE FOR MINOR STRUCTURES

PART I - GENERAL

1.1 SCOPE

This specification is intended for the concrete components of the picnic table, for concrete slabs and walkways, and for incidental concrete work.

Concrete for boat ramp construction shall comply with requirements of Section 501.

PART II - MATERIALS

2.1 READY-MIX CONCRETE FOR GENERAL PURPOSE

A. Supplier shall be a ready-mix firm regularly engaged in the business. Contractor shall submit mix design prior to concrete placement, and shall submit batch specifications, including all items listed in Mix Design below, for all individual concrete batches delivered to the site.

B. Mix Design:

1. Proportion the cement, aggregate, and water to obtain concrete with good workability.

2. Minimum cement content: 6.0 sacks per cubic yard.

3. Maximum water-cement ratio: 5.5 gallons per sack.

4. Slump: 2 to 4 inches by ASTM C143.

5. Air content: 3.5 to 6.5 percent by ASTM C231.

6. Cement: ASTM C150 type II or IIA.

7. 1-Inch Minus Concrete Aggregate: ASTM C33 with designated size of coarse aggregate

No. 67(3/4-inch to No. 4). The gradation of the combined fine and coarse aggregate shall be within the following limits:

Sieve Percentage by Weight Designation Passing Square Mesh Sieves

1 inch 100 3/4 inch 85-100

3/8 inch 50-80 No. 4 35-55 No. 16 20-35 No. 50 4-20

No. 100 0-4

8. 1/2-Inch Minus Concrete Aggregate: ASTM C33 with gradation of the combined fine and coarse aggregate within the following limits:

Sieve Percentage by Weight Designation Passing Square Mesh Sieves

½ inch 100 #4 40-70 #10 25-60 #200 2-10

9. Water: Potable.

10. Admixtures: Air-entraining, ASTM C260, such as, but not limited to

"Protex," "Darex," or "MB-VR." Admixtures other than air-entraining not permitted.

C. Concrete for slabs and steps shall include nylon or polypropylene fibers engineered specifically for use in concrete. Fibers shall be “Nycon Concrete Reinforcing Fibers” or CO-approved equal. Install fibers in accordance with manufacturer’s specifications.

2.2 JOB-BATCHED CONCRETE FOR GENERAL PURPOSE

A. Aggregate shall be as specified in Item READY-MIX CONCRETE FOR GENERAL PURPOSE of this Section.

B. Air-entrained mix using type IIA cement required unless type II cement is approved by the CO.

C. Mechanical mixing required.

D. Proportion dry indredients by volume in the following ratio:

1. Cement: 3 parts.

2. Sand: 5 parts.

3. Coarse aggregate: 7 parts.

E. Add water to obtain a slump of 3-6 inches. Based on the ratio of dry ingredients of 3-5-7, the water will be approximately 2 parts.

F. The relative proportions of sand and coarse aggregate may be adjusted, with approval of the CO if necessary to obtain better workability.

G. Concrete for slabs and steps shall include nylon or polypropylene fibers engineered specifically for use in concrete. Fibers shall be “Nycon Concrete Reinforcing Fibers” or CO-approved equal. Install fibers in accordance with manufacturer’s specifications.

2.4 REINFORCING STEEL

A. Reinforcing Steel: ASTM A615, grade 40 unless other grade indicated on the plans.

B. Welded Wire Mesh: ASTM A185.

C. All reinforcement shall be new, free from dirt, oil, paint, grease,loose mill scale, and loose or thick rust when placed.

3.1 WEATHER

Heat or protect concrete as necessary to maintain a temperature of more than 35 degrees F. for at least 24 hours after placing.

3.2 CURING AND PROTECTION

Concrete that is pitted, cracked, or otherwise of substandard quality will be rejected.

3.3 MEASUREMENT AND PAYMENT

There will be no separate payment made for concrete. Payment for concrete is included in the payment for work as specified in other Sections.

954 – OBLITERATION AND SURFACE RESTORATION

PART 1 -GENERAL

1.1 DESCRIPTION

Work under this Section consists of spreading conserved topsoil over all ground surfaces disturbed by construction activities, including disposal of waste material from excavation.

PART II - PRODUCTS

2.1 TOPSOIL

Topsoil shall be native topsoil salvaged from the site that is deemed by the Engineer to be suitable for use in surface restoration. Topsoil is defined as friable clay loam surface soil reasonably free of subsoil, clay lumps, stoned, and other objects over 2 inches in maximum dimension, and without refuse, trash, or other objectionable material.

3.1 TOPSOIL SALVAGE

Salvage topsoil only from areas to receive new construction. Salvage all available topsoil to perform surface restoration as specified herein.

3.2 TOPSOIL STOCKPILING

Stockpile topsoil in pile on site in areas approved by the Engineer.

3.3 TOPSOIL INSTALLATION

Spread a 3-inch thick layer of topsoil over all surfaces disturbed by any construction or construction-related activities, including disposal of waste material from excavation.

3.4 MEASUREMENT AND PAYMENT

Do not measure Surface Restoration work for payment. Surface Restoration work specified herein shall be incidental (indirect payment) to other work done under this contract.

*****END OF SECTION*****

703 - Aggregate

703.03 Granular Backfill.

(c) Aggregate Base, Surfacing, and Course Granular Backfill. Furnish backfill material that consists of clean, hard durable particles or fragments of crushed stone, crushed slag or crushed gravel meeting the gradation shown below.

Sieve Size Percent Passing

1 inch 100

¾ inch 75 to 100

No. 4 0 to 60

No. 40 0 to 50

No. 200 0 to 5

736 - Geocell

736.01 Geocell.

Furnish geocell material consisting of sheet strips fabricated from high-density polyethylene (H.D.P.E.), connected in series at off-set, full-depth ultrasonic seams aligned perpendicular to the longitudinal axis of the strips. When expanded, the interconnected strips form the walls of a flexible, three-dimensional cellular confinement structure into which the specified infill material is placed.

736.02 Requirements. Furnish geocells consisting of polyethylene material treated to resist ultraviolet degradation and conforming to the requirements shown in table 736-1.

Table 736-1 – requirements for geocells.

Density ASTM D 1505 0.935 to 0.965 g/cm3 (58.4 to 60.2 pounds per cubic foot).

Environmental Stress Crack Resistance

ASTM D 1693 3000 hour

Strip Sheet Thickness

ASTM D 5199 1.27 mm (50 mil), minus 5 percent, plus 10 percent.

Determine thickness in the flat before any surface texturing or other surface disruption.

Short-term peel strength

U.S. Army Corps of Engineers Technical Report GL-86-19, Appendix A

2000 N (450 pound) minimum for 203 mm (8.0 inch) depth cell

Seam Hang Strength 101.6 mm (4”) weld joint supporting load of 72.5 kg (160 pounds) or

101.6 mm (4”) weld joint supporting load of 72.5 kg (160 pounds) while undergoing temperature change from 23O C to 54O C (74O F to 130O F) on 1 hour cycles.

30 days minimum

7 days minimum