# Major tears to muscles, tendons, ligaments at Key Structures, LLC
> OSHA SIR `2021010106` · 1/6/2021 · PUEBLO, COLORADO
## Severity
- **1 hospitalization**
- **Body part:** Knee(s)
- **Nature of injury:** Major tears to muscles, tendons, ligaments
## Cause
- **Event:** Other fall to lower level 11 to 15 feet
- **Source:** Extension ladders
- **Secondary source:** Floors, walkways, ground surfaces, unspecified
## Employer
- **Name:** Key Structures, LLC
- **Location:** 319 Lockheed St, PUEBLO, COLORADO, 81001
- **NAICS:** 332311
- **Jurisdiction:** 1
## Narrative

An employee was doing roof work on a manufactured home inside a plant. As he stepped off the roof onto an extended ladder, his foot slipped between the rungs. The ladder gave out and he fell about 13 feet, suffering torn anterior and posterior cruciate ligaments in the right knee and leg (as well as a possible blood clot). He was hospitalized.

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*Source: [OSHA Severe Injury Reports](https://www.osha.gov/severe-injury-reports) · MORVS · CC0 1.0*