Attachment_1_Special_Specifications.pdf

USDA Forest Service PROJECT SPECIFICATIONS

Rev. Date 7/12 Letts Lake Fishing Pier Replacement 01 90 00 - 1/1 Mobilization Payment Procedures

SECTION 01 90 00

MOBILIZATION PAYMENT PROCEDURES

1. PART 1 - GENERAL

1.01 SUMMARY

A. This work shall consist of preparatory work and operations necessary for the movement of personnel, equipment, supplies, and incidentals to the project site, and for all other work and operations that must be performed or that cause costs to be incurred prior to beginning work on the various items on the project site.

2. PART 2 - PRODUCTS (NOT USED)

3. PART 3 - EXECUTION (NOT USED)

4. PART 4 - MEASUREMENT AND PAYMENT

4.01 PROGRESS PAYMENTS WILL BE MADE AS FOLLOWS:

A. When 5 percent or more of the original contract amount is earned from other pay items, 50 percent of the amount for mobilization, or 5 percent of the original contract amount, whichever is less, will be paid.

B. When 10 percent or more of the original contract amount is earned from other pay items, 100 percent of the amount for mobilization, or 10 percent of the original contract amount, whichever is less, will be paid.

C. Upon completion of all work on the project, any unpaid amount for mobilization will be paid.

D. The total of all payments shall not exceed the original contract amount for this item.

4.02 BASIS OF PAYMENT

A. Payment will be made under:

PAY ITEM DESCRIPTION PAY UNIT

01 90 00 Mobilization Lump Sum

END OF SECTION

USDA Forest Service Project Specifications

April 30, 2019 Letts Lake Fishing Pier Replacement 02 41 13 - 1/2 Selective Demolition

SECTION 02 41 13

SELECTIVE DEMOLITION

1. PART 1 - GENERAL

1.01 DESCRIPTION

A. The work in this section consists of the installation of a temporary cofferdam and demolition and disposal of the Letts Lake Fishing Pier.

1.02 QUALITY ASSURANCE

A. Comply with safety requirements for demolition, ANSI A10.6-90.

B. Comply with USFS National Best Management Practices (BMP’s) for

Operations in Aquatic Ecosystems.

1.03 PROJECT CONDITIONS

A. Site access and the debris removal route is limited to the trail footprint.

B. Ensure safety of persons in demolition area. Provide temporary barricades as required.

C. Dispose of refuse at least weekly.

D. Explosives: Not Permitted.

2. PART 2 - PRODUCTS

2.01 COFFERDAM

A. Material proposed for temporary cofferdam shall be approved by COR prior to placement.

3. PART 3 - EXECUTION

3.01 COFFERDAM

A. Cofferdam shall be installed so the interior dimensions give sufficient clearance for the demolition and re-construction of the fishing pier.

B. Cofferdam placement shall allow for pumping from the sumps outside the project area; turbid water shall not be discharged into nearby waterbodies.

C. Cofferdam shall be safely designed and constructed, carried to adequate depths and heights and made watertight as necessary for the proper performance.

D. Sediment removed from inside the cofferdam shall be re-located to the main campground.

E. Cofferdam shall be inspected weekly to ensure performance is acceptable.

3.02 DEMOLITION

A. Remove railing, concrete deck, gabion baskets and all other debris from the fishing pier demolition and dispose, unless otherwise noted.

B. Stockpile existing cobble at location designated by the COR in the field; cobble will be used to pack new gabion baskets.

USDA Forest Service Project Specifications

April 30, 2019 Letts Lake Fishing Pier Replacement 02 41 13 - 2/2 Selective Demolition

C. Contractor shall note material type, location and placement of fishing pier components during demolition to aid in the re-construction process.

D. Care shall be taken to protect existing surfaced trail and surrounding area during demolition. Damages to surfaced trail or surrounding area shall be repaired by the Contractor at his/her own expense.

3.03 RESTORATION

A. Grading: Grade surface to blend with original contours and provide free drainage flow.

B. Finished surfaces shall be the same as the surrounding surface (i.e., native grass, native soil, asphalt pavement, etc.)

3.04 DISPOSAL

A. Unless otherwise specified, all removed material becomes the property of the Contractor and shall be legally recycled or disposed of off government property in accordance with local, state, and federal regulations.

3.05 CLEAN UP

A. After project completion the site shall be cleaned of all dust and debris. In addition, dust and dirt shall be rinsed from trail and campground roads, March 2019 Letts Lake Fishing Pier Replacement 35 51 13 - 1/6

Fishing Pier

SECTION 35 51 13

FISHING PIER

PART 1 - GENERAL

1.01 SCOPE:

A. This work consists of replacing the Letts Lake Fishing Pier, in kind.

1.02 CODES AND STANDARDS:

A. Work performed under this section shall meet the requirements of the following:

1. Internation Building Code 2018

2. ADA/ABA Accessibility Guidelines 2004

3. American society for Testing and Materials (ASTM)

4. California Building Code 2019

5. Occupational Health and Safety Administration (OSHA)

6. USFS National Best Management Practices (BMP’s) for Operations in Aquatic Ecosystems.

1.02 RELATED SECTIONS:

A. 02 41 13 Selective Demolition

PART 2 - PRODUCTS

2.01 GABION BASKETS:

A. All materials shall be new, of size, material, and type called for in these specifications and shown on the drawings.

1. PVC coated, double twisted hexagonal woven wire mesh galvanized steel baskets.

2. Minimum strengh requirements of mesh and connections are as follows:

a. Tensile strenght parallel to twist, 2900 lb/ft

b. Tensile strenght perpendicular to twist, 1400 lb/ft

c. Connection to selvedges, 1200 lb/ft

March 2019 Letts Lake Fishing Pier Replacement 35 51 13 - 2/6

d. Panel to panel (using lacing wire or ring fasteners), 1200 lb/ft

e. Punch test, 5300 lb

3. The wire mesh shall resist pulling apart at any of the twists or connections forming mesh when a single wire stand in the section of mesh in cut.

4. The PVC coating shall be gray in color and shall have a nominal thickness of 0.0216 inches but not less than 0.015 inches in thickness. The protective PVC plastic shall be suitable to resist deleterious effects from exposure to light, immersion in salt or polluted water and shall not show any material difference in its initial properties. The PVC compound shall also be resistant to attack from acids and resistant to abrasion.

5. All gabion material shall be manufactured according to ASTM A975-

97 guidelines for double twisted hexagonal mesh gabions.

2.02 GEOTEXTILE FABRIC:

A. Black, polyester, non woven, corrosion and oxidation resistant.

2.03 CONCRETE, FORMWORK AND REINFORCEMENT:

A. FORMWORK:

1. Forms for all concrete work shall be new Douglas Fir Plywood (APA) 5-ply, 5/8”, Class 1, Exterior Type, oiled and edged and edge sealed.

2. All exposed concrete edges shall be chamfered ½” minimum.

B. FORM COATING:

1. Form SEALER: “Nox-crete Form Coating”, or approved equal for wood forms only.

2. Spray-on compounds shall not affect color, bond or subsequent treatment of concrete surfaces.

C. REINFORCEMENT:

1. Grade 60, #4 rebar @ 18” O.C. both ways.

March 2019 Letts Lake Fishing Pier Replacement 35 51 13 - 3/6

D. CONCRETE:

1 Mix Design: Minimum 28-day design strength of 3000 psi, 4 inch max. slump,1.5 lb Fibermesh/CY and 4%-6% air entrainment.

2. Submit the following information a minimum of 7 days prior to beginning placement:

(1) Type, grading, and sources of aggregate.

(2) Type and source of cement, blended cement, or fly ash.

(3) Saturated surface dry weights of the fine and coarse aggregate in pounds per cubic yard of concrete.

(4) Weight of mixing water in pounds per cubic yard of concrete.

(5) Weight of cement in pounds per cubic yard of concrete.

(6) Admixture type, quantity, and certification by manufacturer.

(7) Air content.

(8) Slump.

(9) 28-day compressive strength.

2.04 RAILING, POSTS AND RIM BOARDS

A. RAILING: 2”x4” and 2”x6” as shown in drawings, construction common Redwood, S4S, 19% maximum moisture content.

B. GUARDRAILS: 2”x4”, construction common Redwood, S4S, 19% maximum moisture content.

C. RIM BOARDS: 2”x8”, construction common Redwood, S4S, 19% maximum moisture content.

D. STAIN: Transparent, Redwood, Oil-Based Exterior Stain, Superdeck or approved equal.

2.05 COBBLE:

A. Stockpiled from demolition of pier. Additional cobble required shall match size, shape and type of existing cobble.

March 2019 Letts Lake Fishing Pier Replacement 35 51 13 - 4/6

PART 3 - EXECUTION

3.01 GABION BASKETS:

A. Gabion baskets shall be placed on compacted soil to ensure uniform bearing capacity and to minimize differential settlements.

B. Fabric shall be placed between foundation bed and gabion baskets per manufacturers instructions.

C. Gabion baskets shall be assembled and filled per manufacturers instructions and shall be placed in a manner to remove any kinks or bends in the mesh and to uniform alignment.

C. Deformation and bulging of gabion baskets shall be corrected prior to additional stone filling. Care shall be taken to assure PVC coating on the gabions is not damaged. Gabions that are damaged or have damaged PVC coating will not be accepted and must be replaced.

3.02 CONCRETE AND FORMWORK:

A. The design and engineering of the formwork and rim board installation, as well as its construction, shall be the responsibility of the Contractor.

B. Excessive deflection of forms after concrete is poured shall be sufficient cause for rejection of that portion of concrete and formwork. Excessive deflection will be considered to be that which will produce visible and noticeable waves in the finished concrete.

C. Forms shall be inspected prior to placing reinforcment.

D. Rebar shall be placed uniformly inside forms, properly supported, securely fastened at each intersection. Rebar shall have a minimum of 1 ½” inches of concrete coverage around circumference and on each end.

E. Concrete shall be handled from the mixer to the place of final deposit as rapidly as practicle by methods which shall prevent the separation or loss of the ingredients.

F. Concrete, once started, shall be carried on as a continuous operation until the section of approved size and shape is completed.

March 2019 Letts Lake Fishing Pier Replacement 35 51 13 - 5/6

G. Any interruption in placing of more than 60-minutes will be cause for shutting down the work and wthe wasting of any remaining mixed concrete and concrete in hoppers or mixers.

H. Concrete shall be thoroughly compacted by puddling with suitable tools during placing, and thoroughly worked around the reinforcement and into corners of the forms. In addition to manual spading and tamping, all concrete shall be internally vibrated with mechanical vibrators.

I. All flatwork finishing must be performed by experienced operators.

Flatwork shall be brought to grade and care shall be taken to insure full thickness. Surface shall be uniform and level.

J. Finish concrete surface using a steel trowel to produce a slick, smooth surface free of bleed water. Texture suface to a uniform condition using a medium or coarse fiber broom.

K. Form boards can be removed a minimum of 7 days after concrete has been poured.

3.02 POSTS AND RAILING

A. Posts and railing shall be installed as shown on the drawings and shall be level and plumb.

B. Railing shall be fastened with a minimum of 3”, brown, wooden deck screws.

C. Railing, posts and rim boards shall be stained with a minimum of 2 coats of transparent, oil-based, exterior stain. Care should be taken to protect concrete deck and surrounding area from spills, splashes or overspray.

3.03 SITE CLEAN UP

A. After project completion the site shall be cleaned of all construction material and debris. In addition, dirt shall be rinsed from surfaced trail and campground roads.

March 2019 Letts Lake Fishing Pier Replacement 35 51 13 - 6/6

PART 4 - MEASUREMENT AND PAYMENT

4.1 METHOD OF MEASUREMENT

A. Measurement for the work described herein, in related sections and as shown on the drawings will be lump sum.

4.2 BASIS OF PAYMENT

A. Payment will be made under:

PAY ITEM DESCRIPTION PAY UNIT

35 51 13 Fishing Pier Lump Sum