DRAFT_SOO_Traffic_Control_1.pdf

DRAFT

Statement of Objectives (SOO) for Traffic Control Services at Navajo Dam

1. PURPOSE

The purpose of this effort is to ensure safety while completing investigatory drilling at Navajo Dam along road NM 511. To complete drilling, equipment will be staged on the roadway, requiring lane closures on NM 511 across the face of Navajo Dam. Figure 1 reflects the locations of roadways across Navajo Dam.

Lane closure will be required for the safety of both workers and the traveling public.

Figure 1: Navajo Dam Roadways

2. BACKGROUND

An investigation of Navajo Dam embankment materials is required in the 2026 winter through spring seasons. Drilling is required for the investigation in several locations that are only accessible from the roadways across the dam.

Due to the available shoulder width on NM511 across the face of the dam, it is anticipated that the roadway can remain open for travel through one lane, alternating directional travel. The southern lane (against the face of the dam) will be used to stage equipment while the northern lane (adjacent to the downward slope) will be maintained for the traveling public. The lane closure will remain in place 24-hours a day, seven days a week for an estimated approximate four (4) month duration.

3. SCOPE

The scope of this effort includes all services and equipment be provided by the selected contractor to achieve a compliant single-lane closure, allowing for alternating travel directions in the open lane, on NM 511 in a safe manner for both workers and the traveling public. The scope includes acquisition of a permit from NMDOT and completing the associated Traffic Control Plan (TCP) design and approval, providing labor for installation and maintenance of devices identified in the TCP, and supply of NMDOT and Manual on Uniform Traffic Control Devices (MUTCD) compliant traffic control devices such as signage, barriers, temporary traffic signals, and message boards necessary for the duration of road closures. Labor will include supervision of personnel and installation, inspection, maintenance and field adjustment of traffic control devices on the project. A Traffic Control Supervisor, certified as a “Work Zone Safety Supervisor”, shall be responsible for traffic control management, inspection, and repair or replacement of deficient devices each day and ensuring compliance with NMDOT permit requirements.

Determination of available lane width for the traveling public will be the responsibility of the selected contractor in coordination with the Bureau of Reclamation and NMDOT. If wide / oversized load restrictions are required, the necessary advanced notice and detour signage required will be the responsibility of the contractor to provide.

Conceptual Traffic Control Plans are attached to this document for reference, but final, stamped plans will be the responsibility of the selected contractor to provide and submit for acquisition of NMDOT permits, including any necessary revisions. Cost estimating shall be based on the Contractor’s experience and expertise and not the conceptual plans provided.

4. PERIOD OF PERFORMANCE

The period of performance for this statement of objectives is anticipated from December 8th, 2025 to May 20th, 2026. A breakdown of the assumptions for the Period of Performance is as follows:

• December 8th, 2025 – January 1st, 2026: Preparing traffic control plans and procuring NMDOT permits

• January 2nd, 2026: Placing VMS Boards to notify the public of traffic pattern changes a minimum of 10 days prior to changes

• January 13th, 2026: Installation of NM 511 traffic control devices to achieve lane-closure and associated advance signage

• May 20th, 2026: Removal of traffic control devices from NM 511 to fully open roadway to traffic

5. PLACE OF PERFORMANCE

The primary place of performance will be on Navajo Dam, New Mexico, along state highway NM 511.

Navajo Dam is located in San Juan and Rio Arriba counties. Placement of signage will be at locations to be determined by the contractor, likely along highways NM 511 and 539. Figure 2 shows the location of the dam, configuration of adjacent roadways, and county lines (San Juan County to the west, Rio Arriba County to the east).

Figure 2: Location of Navajo Dam and Surrounding Highways

6. PERFORMANCE OBJECTIVES

a) To ensure a safe working environment by removing traffic where and when staff is working around the drill rig along the roadway.

b) To reduce traffic to a single lane on NM 511, providing a safe work environment for workers and a safe traveling path for motorists with sufficient notice, speed reduction, and preventative measures to maintain this environment.

c) Work and procedures to occur in accordance with New Mexico state and NMDOT highway laws.

7. OPERATING CONSTRAINTS

Coordination with stakeholders in the area will be important to the project’s success. This includes acquisition of a NMDOT permit for the road closure and associated design, review, and approval of a TCP, which will be designed and submitted by the selected contractor. Public notices for closure dates and any changes to the anticipated schedule will be provided by the Bureau of Reclamation and stakeholders will be asked to share the information to their constituents.

Drilling work is anticipated to occur on a ten-day-on / four-day-off schedule. Workers will be present approximately eight of the ten days “on” to allow for travel to and from the site. The drill rigs will not be able to be relocated/removed during “off” periods and traffic control will remain in place for the duration of the performance period.

There is limited width available on NM 511 across the face of the dam. The drill rigs will be able to set with tires in the drainage ditch on the upslope side of the dam to provide space for traffic control devices, but determination of the available lane-width and any associated vehicle restrictions will be determined by the selected contractor based on selected devices, in coordination with the Bureau of Reclamation and

NMDOT.

Attachment A: Conceptual TCP for NM511 Single-Lane Closure

Legend

Work Area

WZTCLLC WZ Barrier

350'

Comments:

1. Plan not to scale, concept only.

2. All traffic control shall be set in accordance with the latest edition of the MUTCD.

3. All devices shall be in compliance with the 2016 MASH report.

4. Sign spacing and taper lengths shall be determined by posted speed limit

5. Tapers can be flipped to allow work in opposing lane, Traffic Signal and sign positions remain the same

WZTCLLC

WZTC

LLC

I-2-I Solutions Navajo Dam

Hwy 511 Navajo Dam, NM

MHT 2

Lane Closure on a Two-Lane Road Using Traffic Control Signals (TA-12)

MUTCD

CONCEPTUAL

FOR REFERENCE ONLY

Traffic control plan, proposed device types and quantities, etc.

to be provided by Contractor to comply with NMDOT and MUTCD standards

WZTCLLC Legend

WZTCLLC

WZTCLLC

Work Area

WZTCLLC

WZTCLLC

WZTCLLC WZ Barrier

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

WZTCLLC

2. All traffic control shall be set in accordance with the latest edition of the MUTCD.

3. All devices shall be in compliance with the 2016 MASH report.

4. Sign spacing and taper lengths shall be determined by posted speed limit

5. Tapers can be flipped to allow work in opposing lane, Traffic Signal and sign positions remain the same

Navajo Dam

Hwy 511 Navajo Dam, NM

MHT 2

Lane Closure on a Two-Lane Road Using Traffic Control Signals (TA-12)

MUTCD

CONCEPTUAL

FOR REFERENCE ONLY

Traffic control plan, proposed device types and quantities, etc.

to be provided by Contractor to comply with NMDOT and MUTCD standards

NOTE: Work Zone will be in opposite lane as that shown, on upslope side of the dam

Navajo Dam

Hwy 511 Navajo Dam, NM

MHT 2

Lane Closure on a Two-Lane Road Using Traffic Control Signals (TA-12)

MUTCD

Legend Work Area

WZTCLLC WZ Barrier

2. All traffic control shall be set in accordance with the latest edition of the MUTCD.

3. All devices shall be in compliance with the 2016 MASH report.

4. Sign spacing and taper lengths shall be determined by posted speed limit

5. Tapers can be flipped to allow work in opposing lane, Traffic Signal and sign positions remain the same

CONCEPTUAL

FOR REFERENCE ONLY

Traffic control plan, proposed device types and quantities, etc.

to be provided by Contractor to comply with NMDOT and MUTCD standards