NGWSP_-_Block_2-3_HDD_Site_Tour_-_2_DECEMBER_2025_0001.pdf

Navajo-Gallup Water Supply Project (NGWSP)

December 2, 2025

Block 2-3 HDD Pre-Bid Conference

Agenda

• Overview Presentation

• Introductions

• NGWSP Overview

• Block 2-3 HDD Project Overview

• Challenges

• Acquisition Overview

• Safety

• Questions

• Travel to the site (10:45 to 11:00)

• Tour the site starts at 11:00

• Adjourn

NGWSP Background

March 30, 2009

NGWSP Background

• Description

• Currently estimated at $2.2 Billion

• 2 Main Laterals (Cutter and San Juan) totaling 300 miles of Pipelines (20”-48”)

• 2 Conventional Water Treatment Plants with ultimate capacity of 5 & 38 MGD

• 19 Pumping Plants -- raw and finished water

• Numerous Storage Tanks

• Construction began – June 2012

• Complexities

• Cultural Resources and Environmental Compliance

• Land Acquisitions

• Bringing power to remote area

• Coordination with various Stakeholders and Jurisdictions

• Various Studies

Cutter Lateral

San Juan Lateral

Operational Completed Under Construction In Design (As of March 2025)

Project Status

4A/4B Pipeline Completion: Dec. 2025

San Juan Lateral WTP Const. Completion: Dec. 2028

Lybrook Completion: 2027

BBN9 Lateral Completion: 2028

Pumping Plants 2 & 3 Completion: Jan. 2026

Block 2-3 HDD

Presenter Notes Presentation Notes Lybrook Dates

Project Overview Map Cutter Lateral

San Juan Lateral

Operational Completed Under Construction In Design (As of February 2024)

FCWR

WTP

SJL Intake & River Pumping System

42” Line to Reservoir

Intake and River Pumping Plant

Block 2-3 Pipeline – (not the HDD)

• 42” to 48” Pipeline ~12 miles

• Pipeline Appurtenances

• Jack and Bore Crossings

• Two (2) - 240,000-Gallon Raw Water Concrete Storage Tanks

• SCADA

• Cathodic Protection

Not part of the HDD project– Award ETA September 2026

Block 2-3 Pipeline -- (not the HDD)

SJLWTP

Reach 3 ~8.1 Miles

Reach 2 ~3.8 Miles

SJLWTP Regulating Tanks~4.0 Miles

~4 .1 Miles

~1.0 Miles ~0.2 Miles

~1.1 Miles ~1.5 Miles

Block 2-3 Horizontal Directional Drilling

SJLWTP

Reach 3 ~8.1 Miles

Reach 2 ~3.8 Miles

SJLWTP

Reg. Tanks

~4.0 Miles

~4 .1 Miles

~1.0 Miles

~0.2 Miles

~1.1 Miles ~1.5 Miles

- Block 2-3 HDD

Block 2-3

FCWR

SJLWTP

SJLWTP Regulating Tanks

Approximately a Total of 1.8 miles

HDD CROSSINGS

Item # HDD Crossing Name Length

(feet) Elevation

Difference (feet)

Pipe Diameter

(inch)

Reamed Diameter (inch)

Pipe Material

1 Reach 2 -- San Juan River 2,400 65 36 48 Steel 2 Reach 2 -- Nenahnezad Bluff 3,300 241 42 54 Steel

3 Reach 2 -- Shumway Arroyo 2,000 / 1,100 23 36 48

Steel /

HDPE /

PVC

4 Reach 3 -- Chaco River 2,080 3 36 48 Steel

Reach 2 HDD

Shumway HDD

~2,000 LF

San Juan River HDD

~2,100 LF

Nenahnezad Hill HDD

~3,300 LF

Reach 3 HDD

Chaco River HDD

~2,000 LF

Pumping Plant 1

• Metal Building ~13,000 SQFT

• Six (6) 700-horsepower Vertical Turbine Pumps

• Q = 71 CFS and TDH = 315 Feet

• Steel Manifold Piping

• 4 Air Chambers (2-2)

• Electrical System

• Precast Concrete Manholes & Vaults

• SCADA System

• Access Road improvements

Contact Awarded to Ames Construction on November 10, 2025

Close Coordination and Cooperation is required

FCWR

Reach 2

Block 2-3 HDD Schedule

• Bids Due Date – February 25, 2026 at 1 pm MT

• Bids Evaluation Completion – March 2026

• Award Date – May 20, 2026

• Construction Completion Date – September 21, 2027

Shumway Arroyo Challenges

• Conductor casings may be needed at for the alluvium (cobbles and boulders) that could be encountered

• Crossing existing Farmers Mutual Irrigation Siphon (very old and fragile)

• 2 Material options – Metallic or Plastic

• 23-foot elevation difference between entry and exit

San Juan River Challenges

• Conductor casings are required on both entry and exit sides

• Requires that pilot bore uses an intersection method (drilling from both sides)

• Cobbles and boulders are expected in alluvium, based on geology data

• Mid-pull Weld will be required due to limited ROW

• ~1,900 feet is available to laydown at a time

• 65-foot elevation difference between entry and exit

• Unpaved ditch located at the HDD Exit

Nenahnezad Bluff Challenges

• There is an elevation difference of 240-feet between the entry and exit pits

• Conductor casings are not required but may be used.

• Entry HDD is located in uncontrolled manmade fill.

• Nenahnezad Hill Road location and steepness.

Chaco River Challenges

• Approximately 5.5 miles of access road will be required, includes:

• Stripping, clearing, and grubbing

• Repairs and maintenance to new and existing roadways

• Final grading, inspection, clean-up, and restoration of access roads

• Available laydown on both sides of HDD to allow contractor flexibility.

• Dipping bedrock needs to be drilled through

Acquisition Overview

• ACQUISITION OVERVIEW

• PRINCIPAL CONSTRUCTION COMPONENTS

• ENVIRONMENTAL AND CULTURAL REQUIREMENTS

• SAFETY REQUIREMENTS

• NOTICE OF BUY AMERICAN REQUIREMENTS

• PREFACE

• SOLICITATION POINTS OF CONTACT AND COMMUNICATION

• BIDS DUE DATE/TIME – Bid must be submitted no later than February 25, 2026, 1:00 pm MST

Safety

Questions

a. Contracting Officer (Ashton Jones, 801-524-3621, ajones@usbr.gov)

b. Contracting Specialists (Amy Loveless, 801-524-3790, aloveless@usbr.gov;

Tyler Spencer, 801-524-3653, tspencer@usbr.gov)

c. are the official points of contact.

mailto:ajones@usbr.gov mailto:aloveless@usbr.gov