B09_Amd_1_Specs_31_37_10_Riprap_8-3-2021_0001.pdf

REHABILITATE CRANE FLAT CAMPGROUND FINAL CONSTRUCTION DOCUMENTS

August 2021

YOSE – 312448 31 37 10 - 1

RIPRAP

I SECTION 14 60 01 - RIPRAP

PART 1 - GENERAL

1.1 WORK DESCRIPTION

A. The work of this section consists of furnishing and placing stone riprap for embankment and channel protection.

1.2 RELATED WORK

A. Section 31 23 00 – Site Excavation and Grading

1.3 DEFINITIONS

A. Standard Specifications: Wherever reference is made to "Standard Specification", it shall be interpreted to mean the Standard Specifications issued by the State of California Business and

Transportation Agency, Department of Transportation (CDT), and the following shall apply:

1. In the case of conflict between the Standard Specifications and these specifications, these specifications shall govern.

2. Where the term "Engineer" is used in the Standard Specifications, it shall be understood to mean the "Contracting Officer".

3. Where the term "Special Provisions" is used in the Standard Specifications, it shall be understood to mean these specifications.

4. Where the term "State" is used in the Standard Specifications, it shall be understood to mean "Government".

5. Any provisions for measurement and payment specified in the Standard Specification shall be disregarded and the provisions of these specifications shall govern.

6. Where the term "Asphalt Concrete" is used in the Standard Specifications, it shall be understood to mean "Asphalt Paving".

1.4 REFERENCES

A. Section 72 – Slope Protection, CDT Standard Specifications.

1.5 SUBMITTALS

A. As specified in Section 01 33 23 – Submittal Procedures.

B. Manufacturer's installation instructions for geotextile fabric.

PART 2 - PRODUCTS

2.1 GEOTEXTILE FABRIC

A. Non-woven drainage fabric, shall be Mirafi 140NC as manufactured by Nicolon Corp., Mirafi

Division, Charlotte, NC 28224, or Contracting Officer Representative approved equivalent.

Salient features include:

• A needlepunched nonwoven geotextile composed of polypropylene fibers

• Material is inert to biological degradation and resists naturally encountered

REHABILITATE CRANE FLAT CAMPGROUND FINAL CONSTRUCTION DOCUMENTS

August 2021

YOSE – 312448 31 37 10 - 2

RIPRAP

chemicals, alkalis, and acids

• A minimum average roll value for Grab Tensile Strength of 100 lbs (445 N) per

ASTM D4632

• A minimum average roll value for Grab Tensile Elongation of 50% per ASTM

D4632

• A minimum average roll value for Trapezoid Tear Strength of 45 lbs (200 N) per

ASTM D4533

• A minimum average roll value for CBR Puncture Strength of 250 lbs (1113 N) per

ASTM D6241

• Maximum Apparent Opening Size of U.S. Sieve size 70 (0.212 mm) per ASTM

D4751

• A minimum roll value for Permittivity of 2.0 sec-1 per ASTM D4491

• A minimum roll value for Flow Rate of 140 gal/min/ft2 (5704 l/min/m2)

• A minimum Test Value for UV Resistance (at 500 hours) of 70% strength retained per ASTM D4355

B. Provide securing pins recommended by fabric manufacturer and fold back as shown on the drawings.

2.2 RIPRAP

A. Riprap shall be Class No 1 as specified in Section 72-2.02 of the CDT Standard Specifications.

PART 3 - EXECUTION

3.1 EXCAVATION

A. Excavate as shown and as necessary to accept variation in stone size. Obtain Contracting

Officer Representative's approval of subgrade before placing geotextile fabric or riprap.

3.2 GEOTEXTILE FABRIC

A. Place on smooth, uniform slope, loosely enough to conform to minor surface irregularities.

Follow manufacturer's recommendations for making laps and for fastening and securing.

Repair or replace fabric that has been damaged to stone placement. Re-lay fabric that becomes dislodged.

3.3 PLACEMENT

A. Placement shall be method B as specified in Section 72-2.03 of the State Standard Specifications

END OF SECTION 31 37 10