Accession Number:

ADA622885

Title:

Environmental Assessment, Repair of the Dam at Non-Potable Reservoir #1, United States Air Force Academy, Colorado

Descriptive Note:

Final rept.

Corporate Author:

10TH AIR BASE WING COLORADO SPRINGS CO

Report Date:

2015-08-01

Pagination or Media Count:

174.0

Abstract:

The hazard classification of Non-Potable Reservoir I was evaluated in accordance with the Colorado Division of Water Resources DWR Guidelines for Hazard Classification, and Rules and Regulations for Dam Safety and Dam Construction. This hazard classification was completed to support the design of dam modifications. Based on the hazard classification analysis and utilizing Colorado State Engineers Office SEO criteria, the results indicate that Non-Potable Reservoir I does not pose a significant threat to loss of human life, but does pose the potential for significant downstream property damage, as a result of a sunny day failure. Therefore, the dam has been classified as a Significant Hazard Dam. The purpose of the action is to repair the dam at Non-Potable Reservoir I to minimize the potential for catastrophic failure. The intake and outlet pipes at the dam are in excess of 50 years old and its downstream embankment slopes are excessively steep and potentially unstable. Because of the over steepened downstream slope and the age of the intake and outlet pipes through the embankment, the dam is deemed to have exceeded its useful life and requires repair. The need for action is due to the potential damage to downstream infrastructure i.e., Union Pacific Railroad, the presence of seepage, the oversteepened downstream slope, and the anticipated poor condition of the embankment piping.

Subject Categories:

  • Civil Engineering
  • Logistics, Military Facilities and Supplies
  • Environmental Health and Safety

Distribution Statement:

APPROVED FOR PUBLIC RELEASE