A04_Final_SOW_and_Exhibits_for_Solicitation.pdf

STATEMENT OF WORK

Red Rock Canyon NCA Visitor Center Complex

Potable Water Pipeline Repair Project

Southern Nevada District, Las Vegas, Nevada

January 2024

Bureau of Land Management Nevada

TABLE OF CONTENTS

1.0 INTRODUCTION

2.0 SCOPE OF WORK

3.0 PROJECT DETAILS

4.0 SPECIFICATIONS

5.0 SITE MANAGEMENT, MATERIAL DISPOSAL, AND CLEANUP

6.0 PROJECT ADMINISTRATION

7.0 BUREAU OF LAND MANAGEMENT POINTS OF CONTACT

Appendix A:

Exhibit 1 .......... Site Vicinity Exhibit 2 .......... Lower Restroom Facility Location Exhibit 3 .......... Water Line Layout Exhibit 4 .......... Isolated Leak Location Exhibit 5 ............ Concrete Construction Detail Exhibit 6 ............ Allowable Work Area Exhibit 7A ......... Pipe Zone Backfill Exhibit 7B ......... Type II Backfill Specification Exhibit 8 ............ Final Backfill Specification Exhibit 9 ............ Walkway Seeded Exposed Aggregate

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1.0 INTRODUCTION

1.1 Project Summary

Locate and repair a leaking 2-inch diameter potable water pipeline that serves a restroom facility at the Red Rock Canyon National Conservation Area (RRC) Visitor Center Complex.

1.2 Project Location

The RRC Visitor Center Complex is located at 1000 Scenic Loop Dr, Las Vegas, Nevada 89161 (Exhibit 1).

The lower restroom facility is located at lat: 36.13502° / long: -115.42693° (Exhibit 2) at an approximate altitude of 3,768 feet above sea level.

1.3 Background

The restroom facility at the RRC Visitor Center Complex contains approximately 41 percent of the fixture units available to the public and is served by a 2-inch diameter potable water pipeline. Water is delivered to the facility by way of a nearby 15,000-gallon storage tank and pumping system (Exhibit 3).

In mid-December 2023 during dry weather, clear, odorless water was observed discharging at a nearby culvert outlet with running water audible in at least two stormwater inlets. Additional observations showed water was wicking to the surface of a portion of the asphalt in the lowest parking lot located approximately 23 feet below the stormwater inlets at the restroom facility.

Based on visual observations and water well meter readings, it was determined that a leaking potable water pipeline was the likely source of the observed water. To confirm this, Bureau of Land Management (BLM) staff shut valve #2 (Exhibit 3) to isolate the last 75 feet of the pipe. Within a 24-hour period, no water was observed flowing from the culvert outlet, the lower parking lot surface was dry and there was a substantial drop in the amount of water being pumped from RRC water well.

Further leak isolation was achieved using an inert gas and ground surface sound detection equipment.

Based on this effort, the leak was isolated to a section located below a raised concrete walkway as shown on Exhibit 4.

As-built plans of the Visitor Center complex suggest the raised walkway might be 7-inches thick with #4 reinforcing bar spaced at 18-inches on center in both directions (Exhibit 5).

2.0 SCOPE OF WORK

Project scope of work activities include the following:

1) Install traffic control devices in accordance with approved traffic control plan.

2) Locate and mark pipeline alignment.

3) Remove concrete as needed.

4) Excavate to expose damaged pipe section.

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5) Repair damaged pipe section.

6) Test pipe repair.

7) Backfill excavation.

8) Repair concrete walkway.

9) Remove all excess material including backfill, concrete, pavement, and equipment.

10) Clean work area by removing all trash and sweeping area.

3.0 PROJECT DETAILS

At over 2.2 million visitors per year, Red Rock Canyon NCA is the most visited BLM site in the United States. The raised crosswalk that connects the parking lot and restroom facility to the rest of the Visitor Center complex experiences high volumes of both vehicular and pedestrian traffic.

The restroom facility has been closed since the pipeline leak was discovered. However, based on the overall site layout, the raised crosswalk area experiences high traffic volumes throughout the year.

During construction the Contractor should expect that visitors will inadvertently try to enter the work area. Visitor safety is a top Government priority, the Contractor with assistance from Government staff shall be expected to politely direct visitors around the work area. Exhibit 6 shows the work area that the Government will provide to the Contractor.

At the end of each workday, Contractor shall make safe the work area and cover any open excavations with traffic trench plates.

3.1 Traffic Management Plan

In cooperation with Government, the Contractor shall develop a traffic management plan that shall be approved by the Contracting Officer prior to starting work. Contractor shall install traffic management cones and signs in accordance with the approved plan prior to starting work.

3.2 Raised Concrete Walkway Removal and Replacement

The approximate area of the pipe leak identified by the leak detection contractor is shown on Exhibit 4. As there is uncertainty as to the exact location of the leak and the extent of pipeline damage, for bidding purposes assume (2) 10 ft. by 10 ft. concrete panels each 7-inches thick with #4 steel reinforced bar and (1) 6 ft. by 10 ft. concrete panel 7-inches thick with #4 reinforcement bar will need to be removed and replaced.

The raised walkway consists of three main sections: the walkway, approach ramp, and departure ramp. Each section that is removed is to be replaced to match existing conditions.

Note that the walkway is a colored, exposed aggregate surface while the ramps have a smooth finish and have no pigmentation.

3.3 Trenching Length

The pipeline is approximately 5-feet deep. This depth is based on field measurements collected by BLM staff that indicate the depth from ground surface to the top of the

January 2024 Red Rock Canyon NCA – Potable Water Line Repair Page 3 of 7 pipeline valve nut is 4-feet.

For bidding purposes, assume a 20-foot-long trench, 3-feet wide and 5-feet deep will be excavated, and 20 ft. of piping will be removed and replaced.

3.4 Stormwater Sewer

Based on stormwater inlet invert elevations and assuming the water line was installed in accordance with Uniform Plumbing Code requirements, the depth of the water pipeline at the storm drain crossing is expected to be approximately 1.34 feet below the top of concrete.

3.5 Interpretation of Quantities in Solicitation

The quantities given in the Solicitation and contract forms are approximate only, being given as a basis for the comparison of bids, the Government does not expressly or by implication, agree that the actual amount of work will correspond therewith, but reserves the right to make such alterations, deviations, additions to or omissions from this Statement of Work including the right to increase or decrease the quantity of any portion of the work or to omit any item or portion of the work as may be determined by the Government to be required for the proper completion or construction of the whole contemplated.

4.0 SPECIFICATIONS

The following specifications will be used for this project:

a) Uniform Standard Specifications for Public Works Construction Off-Site Improvements, Clark County Area, Nevada (USSPWC);

b) Uniform Design and Construction Standards for Potable Water Systems, 3rd Edition, Las Vegas Valley Water District (UDACS); and

c) American Water Works Association ANSI/AWWA C651-14.

4.1 Utility Clearance

A. Contractor shall be responsible for all utility clearances within the work area prior to beginning any excavation work.

4.2 Traffic Management

A. Contractor to install all traffic control cones, signs, and warning tape prior to initiating concrete removal work. Traffic control cones, signs, and warning tape to remain in place for duration of work. Throughout the project duration, the Contractor shall routinely inspect and make as needed adjustments to cones, signs, and warning tape to exclude public vehicles and pedestrians from work area.

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4.3 Concrete Removal, Excavation to Locate Pipe, Pipe Repair Test, and Trench Backfill

A. Prior to beginning work, Contractor will coordinate with Government where to begin pipeline excavation.

B. Contractor shall neatly saw cut and remove concrete where indicated. Removed concrete shall be placed in a location designated by Government.

C. Contractor to excavate and expose leaking pipeline section. Once the pipeline has been exposed and made accessible and prior to its repair, Government shall make observations, take pictures and measurements of damaged pipe section.

D. The replacement pipe segment shall be made of the same material and be the same diameter as the damaged pipe segment and shall be installed in accordance with the Uniform Plumbing Code (UPC) as adopted by Clark County, Nevada. Any pipe couplers used as part of the pipe repair shall be appropriate for the existing pipe material and conform to the UPC as adopted by Clark County, Nevada.

E. Pipeline repair shall be completed at one time. Contractor shall follow disinfection procedures for pipeline repair as outlined in ANSI/AWWA C651-14 sections 4.11.2 thru 4.11.2.2.

F. Prior to backfilling excavation, Contractor to test pipeline repair. The test shall consist of flushing the water line for one hour. The pipeline shall be flushed by opening both janitor room sink valves. The Government shall accept the pipeline repair if observations of the pipeline test show no leaks after 1 hour.

G. Pipe zone backfill shall be in accordance with Exhibit 7A. Type II backfill shall be as specified in USSPWC Section 704.03.04 (Exhibit 7B).

H. Final backfill shall be placed between the top of the pipe zone and top of subgrade and be compacted in loose lifts not to exceed 8-inches to 90 percent of maximum density. Final backfill shall be as specified in USSPWC Section 207.02.02 (Exhibit 8). Trench fill excavated as part of exposing the damaged pipe section can be reused as final backfill with prior Government inspection and approval.

I. Contractor shall install 4-inches of Type II aggregate base on top of subgrade and compact to 95-percent maximum density. Type II aggregate base shall be as specified in USSPWC section 704.03.04. Provide Government with material certificate that confirms aggregate meets specification.

J. Contractor to employ third party company to perform compaction on each compacted backfill lift.

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4.4 Concrete Installation

A. To the extent possible replace the raised concrete walkway with new colored concrete to match color of existing panels. Government in coordination with Contractor shall approve pigment color prior to pigment purchase. Selected pigment to be mixed according to manufacturer's written instructions and result in a hardened concrete color consistent with existing colored concrete panels.

B. Approach ramp concrete shall not receive pigment.

C. The existing raised walkway surface finish is seeded exposed aggregate (Exhibit 9).

Contractor to match existing surface type and texture and coordinate finish with Government prior to pouring concrete.

D. All concrete strength to be 4,000 psi at 28 days.

E. Specific information of existing concrete thickness is not available, therefore Contractor and Government to field verify concrete thickness and reinforcement when concrete panels are removed. For bidding purposes, assume replacement concrete to be 7-inches thick containing #4 steel reinforcement bar 18-inches on center in both directions. Replacement concrete thickness and reinforcement shall match existing.

F. Incidental damage to curbs and pavement outside of the raised walkway shall be repaired at the Contractors expense.

G. Match existing joint system in type, depth, and orientation.

H. Contractor to provide material certificates for the following:

1. Cementitious materials.

2. Admixtures.

3. Steel reinforcement and accessories.

4. Curing compounds.

5. Joint filler strips.

I. Contractor to utilize a qualified concrete installer, preferably ACI Certified Flatwork

Technician, Finisher, and supervisor who is an ACI certified Concrete Flatwork Technician

J. Prior to concrete purchase, contractor shall notify Government of the ready-mix manufacturer that will be used.

K. Steel reinforcement shall be ASTM A615, grade 60, deformed unless it is determined by existing conditions that another type of reinforcement should be used. Steel reinforcement shall have a minimum of 2-inches of concrete cover.

L. Cementitious material shall be Portland Cement ASTM C 150, type I/II. Fly ash shall meet

ASTM C618, Class F. Normal weight aggregates meeting ASTM C33. Maximum coarse aggregate size shall be 1 ½-inch. Fine aggregate shall be free of deleterious reactivity to alkali in cement. Water shall be potable and meet ASTM C94/C94M.

M. Contractor shall utilize third party testing company to test concrete cylinder for 28-day concrete strength. Contractor to provide test results to Government prior to final payment.

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5.0 SITE MANAGEMENT, MATERIAL DISPOSAL, AND CLEANUP

5.1 Site Management

A. Conduct operations to ensure minimum interference with roads, streets, walks, walkways, and other adjacent occupied and used facilities.

B. Do not close or obstruct streets, walks, walkways, or other adjacent occupied or used facilities without permission from Government.

C. Provide alternate routes around closed or obstructed trafficways as directed by Government.

D. Use water mist and other suitable methods to limit spread of dust and dirt. Comply with governing environmental-protection regulations. Do not use water when it may damage adjacent construction or create hazardous or objectionable conditions, such as ice, flooding, and pollution.

5.2 Material Disposal

A. Do not allow demolished materials to accumulate on-site. Excavated material not reused shall be disposed in accordance with applicable local, State, and Federal regulations. No material disposal shall occur within the Red Rock Canyon National Conservation Area.

B. Remove and transport debris in a manner that will prevent spillage on adjacent surfaces and areas.

5.3 Cleaning

A. Clean adjacent areas of dust, dirt, and debris caused by operations. Return adjacent areas to condition existing before project operations began.

B. Clean roadways of debris caused by debris transport.

C. Water will not be furnished by the Government. The contractor must haul all water to the site.

6.0 PROJECT ADMINISTRATION

6.1 Project Coordination

A. Contractor shall notify Government a minimum of 5 working days before initiating on-site work effort.

B. The Contractor shall coordinate and meet with Red Rock Visitor Center staff and designated Government representative to develop a traffic control plan. Contractor shall explicitly state in writing the work area space required to be protected from traffic and the duration of that protection.

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C. Excluding traffic control signs, cones, tape, etc., Government shall provide staff necessary to keep the work area free of Red Rock Canyon NCA visitors.

D. Government personal shall be available by phone or email and will be on-site as needed to respond to Contractor questions. Contact information will be provided when Notice To Proceed is issued.

E. Government shall be available for on-site pre-solicitation and pre-construction meetings when requested.

F. Period of Performance

1. Work shall commence no later than 10 business days from the issuance of Notice to Proceed.

2. Period of performance is 35 calendar days from Notice to Proceed.

3. The Contractor shall notify Government five working days in advance of initiating work at the site and obtain Government approval for that date.

G. Warranty

Contractor shall warranty work for 1-year following pipe repair acceptance by Government.

H. Site Access

The Contractor shall have full use of areas needed to perform the work. Contractor’s use of premises is limited only by Governments right to perform work. Schedule and sequence operations necessary to complete the work.

6.2 Work Hours

Work shall be performed Monday through Friday, 7:30 a.m. to 4:30 p.m. except on weekends and legal holidays. Work at other times shall be prior approved by Government.

7.0 BUREAU OF LAND MANAGEMENT POINTS OF CONTACT

TBD at Award

APPENDIX A

Exhibit 1 Site Location

Exhibit 2 Lower Restroom Facility Location

Exhibit 3 Water Line Layout

Exhibit 4 Isolated Leak Location

Exhibit 5 Concrete Construction Detail

Exhibit 6 Allowable Work Area

Exhibit 7A Pipe Zone Backfill

Exhibit 7B Type II backfill Specification

Exhibit 8 Final Backfill Specification

Exhibit 9 Walkway – Seeded Exposed Aggregate