1. Statement of Work.pdf

127EAW23R0066 - Janes Reservoir Dam Repairs

1 SCOPE OF WORK

1. Scope of Work

This specification consists of the method and process for furnishing all labor, materials, tools, equipment and incidents necessary to remove and replace the dam outfall pipe.

Bypass pumping, coffer dam construction, or any other methods required to maintain a dry construction area during construction will be the responsibility of the Contractor unless otherwise specified by the Contracting Officer. Reservoir may be drained as an alternative to coffer dam construction.

2. Schedule

Contract work shall take place between October 1, 2023 and November 30, 2023.

3. Project Location

Janes Reservoir is located on the Devils Garden Ranger District of Modoc

National Forest. It is approximately 30 miles north of Alturas, CA. To arrive at the site from Alturas, take Hwy 299 West for 3 miles, turn North onto Crowder

Flat Road (County Road 73) and drive North for 30 miles. The entrance to Janes

Reservoir will be on the left (West) side of the road.

B. Qualification

1. Contractor

All work shall be performed by a qualified Contractor. The Contractor shall submit qualifications to the COR for review. Submittals must be received with the bid package.

The qualification submittal shall include

1. the Contractor’s name with a contact person, license number, address, phone number, fax number,

2. Description of similar projects

3. Three references who are familiar with the quality of the Contractor’s work.

A contact person and phone number shall be provided for each reference.

2. Manufacturer

The manufacturer shall submit general information about the product, including documentation that the product meets applicable ASTM standards and design specification requirements.

2 EXCAVATION AND EMBANKMENT

Excavation shall be in accordance with OSHA Standards for excavation and trenching.

Material shall be retained and all suitable material shall be reused for embankment rebuilding.

Structural embankment when replacing dam fill shall adhere to section 204 of the Forest

Service Supplemental Specifications (attached in a separate document) with the top of the dam being considered as the roadway prism. Suitable excavated fill shall be used to rebuild the embankment. The forest service will designate a nearby source for any additional fill material if needed.

3 PRODUCT SPECIFICATIONS

This product specification covers 18" diameter polyvinyl chloride (PVC) pressure pipe.

All pipe furnished shall be in conformance with AWWA Standard C900, or latest revision thereof.

A. Except as noted on the plans or approved by Forest Service representative, all C900

PVC pipe shall be Class 150 (DR 18) having a sustained pressure requirement of

500 psi (ASTM D2241) and a minimum burst pressure of 755 psi (ASTM D1599).

B. Dimensions and tolerances for each nominal pipe sizes shall be in accordance with

Section 2.2, Table 1 of AWWA Standard C900.

C. Pipe shall be furnished in standard laying lengths of 20 feet (plus or minus one inch) unless otherwise noted. Each pipe shall have an integral bell formed on the pipe end, and be designed to be at least as strong as the pipe wall (ASTM D2472).

D. An elastomeric gasket shall be designed with a retainer ring, which "locks" the gasket into integral bell groove and shall be installed at the point of manufacturer.

Gasket shall be in conformance with ASTM F477.

E. Each length of pipe furnished shall bear identification markings in conformance with Section 2.6 of AWWA Standard C900.

F. Pipe shall be bundled in pallets for ease of handling and storage. Pipe bundles

(units) shall be packaged to provide structural support to ensure that the weight of upper units shall not cause deformation to pipe in lower units. No pipes bundles shall be accepted which show evidence of ultraviolet radiation "sunburn" on exposed pipe as may be caused from extended unprotected storage conditions.

G. The manufacturer shall take adequate measures during pipe production to assure compliance with AWWA C900 by performing quality-control tests and maintaining results of those tests as outlined in Section 3 of that Standard.

Submission of product shall constitute certification of compliance with this standard.

H. The pipe is intended for use as a dam outfall pipe with an expected life of the pipe system, after installation, of 75 to 100 years.

I. A one-year warranty shall be provided for all materials sold and delivered for use and incorporated into the Janes Reservoir Dam. Such warranty shall take effect on the date that the pipe is received and accepted by an authorized representative of

Modoc National Forest

4 QUALITY ASSURANCE

A. The materials and the method of installation shall be in accordance with ASTM standards and in accordance with manufacturers recommendations.

5 SUBMITTALS

A. SHOP DRAWINGS

The Contractor shall submit shop drawings electronically to the COR for review and approval by FS engineering. The drawings shall be appropriately titled with the Contractors logo and responsible party in the title block. The shop drawings shall include the items listed below:

1. Contractor's responsible party signature.

2. Product specifications

3. Proposed installation method.

6 WARRANTY

The manufacturer shall warrant pipe serviceability, materials, and workmanship under expected operation conditions for a period of ten (10) years after final acceptance. The minimum design life shall be 50 years.

Adjustments to this requirement may be made by the CO with justification.

10 FIELD MEASUREMENTS

The Contractor shall conduct field measurements to ensure pipe fit and length prior to installation.

11 INSTALLATION

A. ENVIRONMENTAL PROTECTION MEASURES

1. Contractor shall delineate a work exclusion zone to prevent materials from entering the waterbody.

2. Contractor shall allow sufficient time for materials to dry before removing coffer dam and allowing water to return to the system. Alternatively, reservoir may be drained rather than constructing a coffer dam.

3. Contractor shall avoid any flagged areas to prevent damage to resources.

12 CLEAN-UP

Contractor shall dispose of all waste and remove all materials, tools, equipment, etc. from the site. Site shall be left clean to the satisfaction of the COR.