Our Concerns


We are Boulder County residents who are concerned about the excessive noise impact to our community from skydiving. These operations affect residential areas in Longmont and unincorporated areas of north Boulder County, including Niwot and Gunbarrel. To date, numerous efforts to work cooperatively with the skydiving operators and the city of Longmont have been unsuccessful. As a result, we are pursuing legal action to address this problem.
Excessive airplane noise degrades our quality of life and property values.

Mile-Hi Skydiving
1. Mile-Hi Skydiving is a private business operating out of Vance Brand Municipal Airport in Longmont, CO. Their drop zone is also located at the airport (where the skydivers jump and land). The City of Longmont owns and operates the airport.
2. Mile-Hi owns 4 jump planes: 1 deHavilland Twin Otter (white and purple), 2 Beechcraft King Air B90s, and 1 Cessna Turbo 206. Additionally, they typically operate a second Twin Otter during peak season. Several aircraft operate concurrently during peak season.

According to the Mile-Hi Skydiving web site:

“Mile-Hi Skydiving’s new Twin Otter is one of the lightest, fastest, and cleanest skydiving jump ships in the country! It hauls 23 jumpers to full altitude in 10 minutes …”
“Mile-Hi Skydiving’s King Air is an 1100 hp twin engine, jet-prop jump ship that rockets 15 jumpers to full altitude in minutes! “
“Go Higher… Go Faster…” Do you have the need for speed….? We’ll elevate you to jump altitude faster than anyone else in the state. (as in just 8-10 minutes – you don’t have to spend 20-30 minutes in slower aircraft elsewhere.) …”
3. The Mile-Hi jump planes are very loud when circling our neighborhoods and climbing aggressively in preparation for the jump. The powerful Mile-Hi aircraft are distinguished by a low-frequency droning sound, which can be heard several miles away and which is nearly continuous during peak season.
4. Jump operations begin early in the morning and run until dark, resulting in 12 hours or more of nearly constant noise above our homes, neighborhoods and recreation areas. In 2012, several evening operations lasted until 11:30 pm.
5. Jump operations are at their peak during the weekend, when many of us are enjoying the outdoors. The noise is also disturbing inside our homes.