A 41-year-old Portland city employee struck by the SUV of local rock star Isaac Brock -- who said he fell asleep at the wheel -- filed an $865,000 lawsuit Wednesday against the Modest Mouse lead singer.

The lawsuit, filed by city employee Cassidy Kane, claims Brock -- the frontman of the indie rock band -- was "impaired" when he slammed his 2004 Land Rover into the back of Kane's City of Portland pickup truck at 9:20 a.m. on Aug. 3, 2016.

A Portland police officer who responded and spoke to Brock didn’t notice any signs of drug or alcohol impairment. Officers didn’t conduct any field sobriety tests, according to a police report.

Kane's Portland-based attorney, Jason Kafoury, said Brock looked "incredibly groggy."

Brock, 42, could not immediately be reached for comment Wednesday.

Officers Kevin Felts and Thomas Larson ticketed him for “careless driving contributing to an accident.” Brock paid a $435 fine.

Drivers falling asleep at the wheel are routinely found in violation of traffic laws, as Brock was. But the act isn’t necessarily a crime under Oregon law, especially if the driver isn’t under the influence of drugs or alcohol. It’s up to an individual officer’s discretion as to whether to conduct field sobriety tests.

In Brock’s case, he was charged with no crimes.

The crash happened on the east side of the Morrison Bridge, near Southeast Belmont Street and Grand Avenue. Police said Brock struck Kane, setting off a chain reaction involving three to four vehicles that were stopped for a red light.

Brock told police he’d been driving across the bridge and fell asleep, according to the police report. According to a witness’s account to police, Brock told the witness he’d fallen asleep and asked if it was against the law.

Police arrived as medics were attempting to treat Brock, according to the report.

“He was anxious to leave and was refusing medical attention against the advice of EMS personnel due to the severity of the crash,” the report read.

In 2002, Brock was convicted of driving under the influence of intoxicants and fourth-degree assault. In 2001 and 2002, he was convicted of the violations of operating a vehicle without privileges, driving while suspended and driving while uninsured.

Modest Mouse formed in the early 1990s, when Brock was a teenager. The band achieved huge success in 2004, with the hit “Float On” as part of the album “Good News for People Who Love Bad News." It sold 1.9 million copies in the U.S., according to BuzzFeed.

The band’s latest album was released in 2015. The band has played in venues around the world, and news of Brock’s 2016 crash made international headlines.

Brock lives in Southeast Portland.

Kane’s attorney, Kafoury, said his client suffered injuries to her neck, shoulders and back, including herniated disks. She takes steroid injections and might need future surgery, the suit states.

Kane was employed as a utility worker at Delta Park. Her job required she lift up to 100 pounds in order to carry out various tasks, including maintaining sports fields, digging irrigation lines and emptying garbage cans, Kafoury said.

Kane hasn’t been able to work in the 15 months since the crash, and she is planning on changing careers, Kafoury said. The city is going to pay for Kane to study business management over the next 1½ to 2 years, Kafoury said.

The suit seeks $115,000 in lost wages and $750,000 for pain and suffering. Brock had auto insurance with Safeco at the time of the crash, but it's unclear how much coverage it offered.

The suit was filed in Multnomah County Circuit Court.

Read the lawsuit here.

-- Aimee Green