1.1.1 Incident Category

Emergency Response, Oil
Major Inland Spill
RP Lead

1.1.2 Site Description

On March 18, 2013, at 2045 MDT Chevron Pipeline notified the NRC that they had a break in an 8" transmission line near Box Elder, Utah. The report indicated that a "significant" amount of diesel fuel had been discharged into a ditch that runs adjacent to, and then into Willard Bay Reservoir, which borders on the Great Salt Lake. The pipeline break was due to a cracked seam, and is located roughly 1/4 mile to the east of the reservoir shoreline. The cracked seam in the pipeline is estimated to be approximately 74 inches in length. Chevron estimates that approximately 600 - 650 BBLs were spilled from the cracked seam. Estimates as of March 24, 2013 indicated clean up efforts had captured 356 BBLs thus far. OSC Curtis Kimbel, OSC Dhieux, PIO Matthew Allen, and one START contractor are deployed.

Chevron Pipeline took immediate action to secure the pipeline and shortly thereafter initiated countermeasures. Most of the diesel fuel was trapped behind a series of check dams and booms placed throughout the ditch. Containment boom was placed along the shoreline of Willard Bay Reservoir to keep the diesel from entering the main body of the reservoir.

Vacuum trucks began removing diesel on the evening of March 18, 2013, and countermeasures continue.

Unified Command, including US EPA, State of Utah, and Chevron Pipeline, was established on Tuesday, March 19, 2013.  UDEQ Drinking Water, Utah DNR, BOR, and FWS arrived on site Tuesday, March 19, 2013.

1.1.2.1 Location

The pipeline break occurred approximately 1/4 mile to the east of the Willard Bay Reservoir, located adjacent to Willard Bay in the northeast portion of the Great Salt Lake.  The spill site is within Willard Bay State Park located approximately 8 miles north of the city of Ogden.

1.1.2.2 Description of Threat

Diesel fuel has accumulated in a drainage ditch and wetland area adjacent to Willard Bay Reservoir.  Although initial response actions by Chevron appear to have contained most of the diesel fuel discharge, some fuel did reach the Willard Bay Reservoir shoreline. Booms were placed approximately 10 feet from the shoreline in an effort to contain the diesel and preclude it from entering the main water body of the Willard Bay Reservoir. In addition to being a supply of fresh drinking water, the Willard Bay Reservoir and adjoining shoreline provides critical habitat for migratory birds and waterfowl.  The spill site is within Willard Bay State Park which is a popular destination for camping, fishing, boating and outdoor recreation.

1.1.3 Preliminary Removal Assessment/Removal Site Inspection Results

Significant amounts of diesel fuel have been discharged into a wetland area, and some has reached the edge of the shoreline of Willard Bay Reservoir. Boom placed along the shoreline at a distance of approximately 10 feet from shore appears, via visual inspection, to have contained fuel from entering the main water body of Willard Bay Reservoir. The shoreline remains very shallow as it departs from the wetland at a depth of several inches for some distance before reaching the main water body of Willard Bay Reservoir. Initial sampling results reveal no detections above drinking water standards in Willard Bay Reservoir outside the containment boom. Several additional sampling locations outside of the boom have been identified for daily sampling, with results expected early the week of Monday March 25, 2013. The samples are taken approximately 30 feet from the shoreline at a water depth between 12 - 18 inches.

Three beavers have been captured and tended to by Utah Department of Natural Resources, one of which was soiled with diesel fuel and required cleaning. Other observed wildlife include nonpoisonous snakes, rodents, as well as deer prints. No migratory foul have been observed although within the next two or three weeks the area is expected to be popular with returning bird populations. Two deceased birds have been recovered, one swallow and one duck, causes of death undetermined, as well as several deceased fish which were identified as 3 Fin Stickleback, a non native invasive species. All effected wildlife were collected by Utah Department of Natural Resources personnel.

2.1.1 Response Actions to Date

Chevron Pipeline has brought in several well equipped response contractors. Crews are working 24 hours a day at the site. The spill site has been divided into 5 areas, each with its own team and section manager. Several hard booms and check dams have been placed along the drainage ditch leading to Willard Bay Reservoir with underflow dams installed in strategic areas.  Crews continue to actively use vacuum trucks to recover diesel fuel. The collected fuel/water mix is then taken to Chevron's refinery in North Salt Lake City for processing.

On Wednesday, March 20, Unified Command held a press conference at which Chevron, EPA and UDEQ had representatives speak with media outlets. Four local television stations, two local radio stations, and two local print news media were in attendance. At the press conference, EPA OSC Curtis Kimbel gave a statement of activity and fielded questions from reporters.

Incident Action Plan for operational period 2 has been approved by Unified Command and runs from March 21 0700 through March 25 0700.

Weather has created the need to continually evolve the cleanup process at the site. A thunderstorm during the night of 20-21 March required personnel to be issued a stop work order. High winds in excess of 30 mph, rain and snow have also impacted response efforts. Daily snowstorms and freezing temperatures have not appeared to hamper recovery activities.

A sampling protocol has been implemented in which UDEQ Div of Water Quality will take custody of samples, deliver them to the lab, analyze/QC the data, and provide data to the public. On March 22 Unified Command reviewed the sampling plan based on initial results to increase sampling locations outside of the booms within Willard Bay Reservoir and to incorporate groundwater sampling into the plan.

On Saturday, March 23, Chevron completed initial repair work on the damaged portion of the pipeline under direction from DOT and the State. The pipeline is not flowing at this time.

As of 0930 Sunday, March 24, a revised estimate of 356 BBLs recovered was provided by Chevron, down from 644 BBLs previously reported. The discrepancy is due to readings recorded before recovered material had properly settled in collection tanks. A revised measurement plan that allows product to settle for 24 hours before measurement is now in place. Chevron will also confirm measurements at their Salt Lake City refinery, where the material is being shipped.


1,300 feet of boom has been deployed as of 24 March 2013.

Three beavers have been captured, two of which were soiled with diesel fuel. The beavers were transported to a nearby wildlife rescue facility. OSC Kimbel and Chevron Pipeline Vice President Terry Duhan visited the wildlife recovery facility to thank them for their efforts caring for the beavers.

2.1.2 Enforcement Activities, Identity of Potentially Responsible Parties (PRPs)

Chevron Pipeline owns the pipeline in question and is furnishing the majority of response assets for the spill response.

2.2.1 Anticipated Activities

Bulk diesel recovery is resulting in significantly reduced quantities of product and will be augmented with low volume flushing to move material to areas where it can be removed via skimming. Clipping, cutting and bagging contaminated vegetation will begin based on SCAT team feedback. State and federal partners working with Chevron Pipeline agreed on a work plan for sections 1, 2, 3 an 5 employing a flush, cut and bag approach along with minimal excavating in areas approved by Utah DNR. The plan is designed to remove as much residual diesel from the impacted wetland and shoreline areas as possible, while minimizing the damage the response efforts cause to the area.  These activities will then likely need to be followed by a re-vegetation/rehabilitation effort.

Any excavation at the site will be witnessed by BOR personnel to ensure no Native American artifacts are disturbed.

A Shoreline Cleanup and Assessment Technique (SCAT) team arrived on scene and has begun assessing the shoreline as of Thursday, March 21. Input from the SCAT team will help provide additional information for the work plan. UDEQ and EPA will have staff members accompany SCAT team during assessment activities.  Chevron also plans to add a second SCAT team next week.

BLM and Fish and Wildlife will assess any beaver lodges within the park to determine if any offspring have been affected or abandoned due to the three beavers that have been relocated to Ogden Wildlife Rehabilitation for observation and cleaning.

Any fish or wildlife found on the site will be reported to Utah Sate Department of Natural Resources and logged in the daily ICS 209 report.

2.2.1.1 Planned Response Activities

Crews will continue recovering free product, and then transition into residual recovery and remediation.  Daily sampling will continue.

At the request of Tribal partners, the Bureau of Reclamation will provide an archeologist to oversee any excavation at the site to ensure any Native American artifacts and/or unmarked burial sites are not disturbed. According to reports from the local Tribe, two sets of skeletal remains have been discovered in the past near Willard Bay State Park. 

Cutting and bagging of vegetation will continue to be a larger part of the response effort and will be overseen by Utah Department of Natural Resources personnel. Daily sampling will continue.

Utah Department of Water Quality will begin releasing sample results to the public via their website on Monday, March 25, 2013.

2.2.1.2 Next Steps

Continue to develop the mitigation plan, sampling plan and wildlife plan in conjunction with Unified Command partners while continuing current operations.

A 7 Day IAP cycle will begin on Monday March 25, 2013 at 0700.

Willard Bay Parks and Rec personnel will place buoys in the reservoir to keep boat traffic clear of the site and will monitor the area with a patrol boat during daylight hours.

2.2.2 Issues

Because of the high value habitat the area provides, coupled with the fast approaching Spring migratory bird nesting season, response efforts must be expedited with care so as to minimize damage to habitat.  The Unified Command is working with affected Natural Resource Trustees to develop the proper path to this end.

3.2 Cooperating Agencies

UDEQ
UDNR
BOR
DOI
USFWS
BLM
Utah Parks and Recreation
DOT PHMSA

EPA             3
START          2
Chevron    127
UDEQ           2
UDNR           4
BOR             2
PHMSA        2