Standard Specifications for Road, Bridge, and Municipal Construction 2020 (M 41-10) - page 13

Page 8-164 

Wire Mesh Slope Protection

8-29 

Wire Mesh Slope Protection

8-29.1 Description

This Work consists of furnishing and installing the anchors and the wire mesh slope 
protection in accordance with these Specifications and the details shown in the Plans 
and in conformity with the lines and dimensions shown in the Plans or specified by the 
Engineer.

8-29.2 Materials

Materials shall meet the requirements of 

Section 9-16.4

.

8-29.3 

Construction Requirements

8-29.3(1) Submittals

The Contractor shall submit a Type 2 Working Drawing consisting of a wire mesh slope 
protection plan. The wire mesh slope protection plan shall include the following:
1.  Plan sheets for anchor layout and installation, and the equipment and process 

used to confirm the capacity of the constructed anchors including the calibration 
data for the stressing devices used to proof test the anchors, as completed by an 
independent testing laboratory within 60 calendar days of the wire mesh slope work.

2.  Working drawings for the temporary yoke or load frame to be used for anchor proof 

testing in accordance with 

Section 6-01.9

.

3.  Plans and details for assembling wire mesh and erecting the assembled mesh on the 

slope.

All the costs for the Work required for Submittals shall be included in the unit Bid price 
detailed in 

Section 8-29.5

.

8-29.3(2) Anchors

The Contractor shall install anchors of the type shown in the Plans and in conformance 
with the layout shown in the wire mesh protection plan. The spacing and number of the 
anchors and wire ropes as shown in the Plans are approximate only, and upon review of 
the wire mesh slope protection plan, the Engineer may arrange the spacing to better hold 
the wire mesh against the slope. Backfill material shall be thoroughly compacted with a 
mechanical compactor.

The Contractor shall proof test up to 25 percent of the anchors in vertical pullout to the 
minimum allowable anchor capacity specified in the Plans. Proof testing of anchors shall 
be performed against a temporary yoke or load frame. No part of the temporary yoke or 
load frame shall bear within three feet of the anchor being tested. For vertical pullout 
proof testing, an anchor is acceptable if it sustains the specified capacity for 10 minutes 
with no loss of load. Anchors that fail this criterion shall be replaced and retested. If more 
than three anchors fail, the Contractor shall proof test all anchors.

Page 1-6 

Definitions and Terms

The Contract includes the Contract (agreement) Form, Bidder’s completed Proposal Form, 
Contract Provisions, Contract Plans, Standard Specifications, 

Standard Plans

, Addenda, 

various certifications and affidavits, supplemental agreements, change orders, and 
subsurface boring logs (if any).

Contract Bond – The approved form of security furnished by the Contractor and the 
Contractor’s Surety as required by the Contract, that guarantees performance of all the 
Work required by the Contract and payment to anyone who provides supplies or labor for 
the performance of the Work.

Contract Form (Agreement Form) – The form provided by the Contracting Agency that 
requires the authorized signatures of the Contractor and the Contracting Agency to result 
in formal execution of the Contract.

Contracting Agency – Agency of Government that is responsible for the execution and 
administration of the Contract. 

Contractor – The individual, partnership, firm, corporation, or joint venture, Contracting 
with the Contracting Agency to do prescribed Work.

Contract Plans – A publication addressing the Work required for an individual project. At 
the time of the call for Bids, the Contract Plans may include, but are not limited to, the 
following: a vicinity map, a summary of quantities, structure notes, signing information, 
traffic control plans, and detailed drawings; all for a specific individual project. At the time 
of the Contract execution date, the Contract Plans include any Addenda.

Contract Provisions – A publication addressing the Work required for an individual 
project. At the time of the call for Bids, the Contract Provisions may include, for a specific 
individual project, the amendments to the Standard Specifications, the Special Provisions, 
a listing of the applicable 

Standard Plans

, the prevailing minimum hourly wage rates, and 

an informational Proposal Form with the listing of Bid items. The proposed Contract 
Provisions may also include, for a specific individual project, the Required Contract 
Provisions Federal-aid Construction Contracts, and various required certifications or 
declarations. At the time of the Contract execution date, the Contract Provisions include 
the proposed Contract Provisions and include any Addenda, a copy of the Contract Form, 
and a copy of the Proposal Form with the Contract prices and extensions.

Department, Department of Transportation – The State Agency authorized by law to 
administer transportation-related work.

Engineer – The Contracting Agency’s representative who directly supervises the 
engineering and administration of a construction Contract.

Federal Highway Administration – The Federal Agency authorized to approve plans and 
contracts for Federal-Aid Highway projects. They also inspect such projects to ensure 
Contract compliance.

Frontage Road – A local street or road usually next to an arterial Highway that serves 
abutting property and adjacent areas and controls access.

Definitions and Terms 

1-01

Highway – A public way for vehicles, including the entire Right of Way.

Inspector – The Engineer’s representative who inspects Contract performance in detail.

Laboratory – The laboratories of the Contracting Agency, or other laboratories the 
Contracting Agency authorizes to test Work, soils, and materials.

Plans – The Contract Plans or 

Standard Plans

 which show location, character, and 

dimensions of prescribed Work including layouts, profiles, cross-sections, and 
other details.

Project Engineer – Same as Engineer.

Proposal Form – The form provided to Bidders by the Contracting Agency for submittal 
of a Proposal or Bid to the Contracting Agency for a specific project. The form includes 
the item number, estimated plan quantity, and item description of the Bid items along 
with blank spaces to be completed by the Bidder for the unit prices, extensions, the total 
Bid amount, signatures, date, acknowledgment of Addenda, and the Bidder’s address. 
The required certifications and declarations are part of the form.

Reference Information – Information provided to the Contractor by the Contracting 
Agency that is not part of the Contract.

Right of Way – Land, property, or property interest, usually in a strip, acquired for or 
devoted to transportation purposes.

Roadbed – The graded part of the Roadway within top and side slopes, prepared as a 
foundation for the pavement structure and Shoulders.

Roadside – The area outside the traveled way.

Roadway – The portion of the Right of Way within the outside limits of the side slopes.

Secretary, Secretary of Transportation – The chief executive officer of the Department 
and other authorized representatives.

Shoulder – The part of the Roadway next to the Traveled Way or Auxiliary Lanes. It 
provides lateral support of base and surface courses and is an emergency stopping area 
for vehicles.

Sensitive Area – Natural features, which may be previously altered by human activity, that 
are present on or adjacent to the project location and protected, managed, or regulated 
by local, tribal, state, or federal agencies.

Special Provisions – Supplemental Specifications and modifications to the Standard 
Specifications and the amendments to the Standard Specifications that apply to an 
individual project.

Specifications – Provisions and requirements for the prescribed Work.

Page 1-8 

Definitions and Terms

Standard Plans – A manual of specific plans or drawings adopted by the Contracting 
Agency which show frequently recurring components of Work that have been 
standardized for use.

State – The state of Washington acting through its representatives.

Structures – Bridges, culverts, catch basins, drop inlets, retaining walls, cribbing, 
manholes, endwalls, buildings, service pipes, sewers, underdrains, foundation drains, 
and other features found during Work that the Contract may or may not classify as a 
Structure.

Subcontractor – An individual, partnership, firm, corporation, or joint venture who is 
sublet part of the Contract by the Contractor.

Subgrade – The top surface of the Roadbed on which subbase, base, surfacing, pavement, 
or layers of similar materials are placed.

Substructure – The part of the Structure below:
1.  The bottom of the grout pad for the simple and continuous span bearing, or
2.  The bottom of the girder or bottom slab soffit, or
3.  Arch skewbacks and construction joints at the top of vertical abutment members or 

rigid frame piers.

Substructures include endwalls, wingwalls, barrier and railing attached to the wingwalls, 
and cantilever barriers and railings.

Superstructure – The part of the Structure above:
1.  The bottom of the grout pad for the simple and continuous span bearing, or
2.  The bottom of the block supporting the girder, or
3.  Arch skewbacks and construction joints at the top of vertical abutment members or 

rigid frame piers.

Longitudinal limits of the Superstructure extend from end to end of the Structure in 
accordance with the following criteria:
1.  From the face of end diaphragm abutting the bridge approach embankment for end 

piers without expansion joints, or

2.  From the end pier expansion joint for bridges with end pier expansion joints

Superstructures include, but are not limited to, the bottom slab and webs of box girders, 
the bridge deck and diaphragms of all bridges, and the sidewalks when shown on the 
bridge deck. The Superstructure also includes the girders, expansion joints, bearings, 
barrier, and railing attached to the Superstructure when such Superstructure components 
are not otherwise covered by separate unit measured or lump sum bid items.

Superstructures do not include endwalls, wingwalls, barrier and railing attached to the 
wingwalls, and cantilever barriers and railings unless supported by the Superstructure.

Definitions and Terms 

1-01

Surety – A company that is bound with the Contractor to ensure performance of the 
Contract, payment of all obligations pertaining to the Work, and fulfillment of such other 
conditions as are specified in the Contract, Contract Bond, or otherwise required by law.

Titles (or Headings) – The titles or headings of the Sections and Subsections herein are 
intended for convenience of reference and shall not be considered as having any bearing 
on their interpretation.

Traveled Way – That part of the Roadway made for vehicle travel excluding Shoulders and 
Auxiliary Lanes.

Work – The provision of all labor, materials, tools, equipment, and everything needed to 
successfully complete a project according to the Contract.

Working Drawings – Drawings, plans, diagrams, or any other supplementary data or 
calculations, including a schedule of submittal dates for Working Drawings where 
specified, which the Contractor must submit to the Engineer.

WSDOT Form – Forms developed and maintained by WSDOT that are required 
or available for use on a project. These forms can be downloaded from the forms 
catalogue at: 

www.wsdot.wa.gov/forms/pdfforms.html

Illumination, Signal, Electrical 

9-29

9-29.1(8)  Drilling Fluid

Drilling fluid used for directional boring shall be an inert mixture of water and bentonite 
clay, conforming to the drilling equipment manufacturer’s recommendations.

9-29.1(9) Repair

Manufacturer repair kits shall be used for field repair of existing conduit, innerduct and 
outerduct. The conduit repair kit shall be manufactured specifically for the repair of 
existing damaged conduit, inner duct and outer duct. The repair kit shall be prepackaged 
and include the split conduit and split couplings necessary to restore the damaged 
conduit to the original inside dimensions including a water and air tight seal.

9-29.1(10)  Pull Tape

Pull tape shall be pre-lubricated polyester pulling tape. The pull tape shall have a minimum 
width of ½-inch and a minimum tensile strength of 500 pounds. Pull tape may have 
measurement marks.

9-29.1(11)  Foam Conduit Sealant

Foam conduit sealant shall be self-expanding waterproof foam designed to prevent both 
water and pest intrusion. The foam shall be designed for use in and around electrical 
equipment, including both insulated and bare conductors.

9-29.2 

Junction Boxes, Cable Vaults, and Pull Boxes

The Contractor shall perform quality control inspection. The Contracting Agency 
intends to perform Quality Assurance Inspection. By its inspection, the Contracting 
Agency intends only to verify the quality of that Work. This inspection shall not relieve 
the Contractor of any responsibility for identifying and replacing defective material 
and workmanship. Prior to the start of production of the precast concrete units, the 
Contractor shall advise the Engineer of the production schedule. The Contractor shall 
give the Inspector safe and free access to the Work. If the Inspector observes any non-
specification Work or unacceptable quality control practices, the Inspector will advise the 
plant manager. If the corrective action is not acceptable to the Engineer, the unit(s) will 
be rejected.

9-29.2(1)  Junction Boxes

For the purposes of this Specification concrete is defined as portland cement or blended 
hydraulic cement concrete and non-concrete is all others.

The Contractor shall provide shop drawings for all components, hardware lid, frame, 
reinforcement, and box dimensions. The shop drawings shall be prepared by (or under 
the supervision of) a Professional Engineer, licensed under Title 18 RCW, State of 
Washington, in the branch of Civil or Structural. Each sheet shall carry the following: