Attachment_A_SOO_Navajo_Drilling.pdf

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 roads NM 511 and NM 539. To complete drilling, equipment will be staged on the roadway, requiring road closures of both NM 511 and NM 539. Figure 1 reflects the locations of roadways across Navajo

Dam. Closures will be required at alternating times 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 2023/2024 winter season.

Drilling is required for the investigation in several locations that are only accessible from the roadways across the dam. Drilling methods will include several inclined drill holes that cannot be performed within a single lane and therefore require closure of the road. Discussions with New Mexico Department of

Transportation (NMDOT) have begun and it has been requested that any road closures allow for access of emergency vehicles in the event that an emergency occurs during the work. The intent is that the roadway will be closed and emergency vehicle access will only occur if absolutely necessary as access will require removal of equipment, significantly disrupting work.

3. SCOPE

The scope of this effort includes all services and equipment provided by the selected contractor to achieve road closures alternating from state highways NM 511 and NM 539. It is anticipated that drilling will require closure of a single highway at a time with work completed on that segment and the roadway reopened prior to moving to the next highway and repeating the process. 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, and message boards necessary for the duration of road closures. 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.

4. PERIOD OF PERFORMANCE

The period of performance for this statement of objectives is anticipated from February 12th, 2024 to May

17th, 2024. Actual dates may vary based on the conditions encountered during drilling.

5. PLACE OF PERFORMANCE

The primary place of performance will be on Navajo Dam, New Mexico, along state highways NM 511 and NM 539. Navajo Dam is located in San Juan and Rio Arriba counties. Placement of signage will be at locations to be determined, likely along highways NM 64, 511, 539, and 173. 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 when staff is working around the drill rig along the roadways.

b) To preclude traffic on both the north and south end of the work area along NM state highways

511 and 539, alternating with location of the drill rig, while maintaining necessary width for emergency vehicles.

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.

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 18-week roadway drilling schedule is an estimate based on best available information, however, given the unknown underground conditions, work duration is difficult to predict. In addition, winter conditions may impact the speed of activity and travel to and from the site. If a schedule extension is required, the contractor will be notified as soon as feasible and the Bureau of Reclamation will work with the contract to achieve a contract modification for additional work.

Attachment A: Conceptual TCP for NM511 Closure

Attachment B: Conceptual TCP for NM539 Closure