Accession Number : ADA611025


Title :   Final Environmental Assessment for Stormwater Drainage Project on F. E. Warren Air Force Base, Wyoming


Corporate Author : CIVIL ENGINEER SQUADRON (90TH) WARREN AFB WY


Personal Author(s) : Pesenti, Cathryn ; Fussinger, William ; Bryant, Rick ; Hambright, Sara ; Kwilinski, Laura ; Bringewatt, Larry ; Palmer, Lynne ; Barry, Shawna ; Horstmeier, Darren ; Wright, John


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a611025.pdf


Report Date : May 2005


Pagination or Media Count : 57


Abstract : Intense storms and large floods are natural events for the Cheyenne area. The most devastating flood on record occurred on 1 August 1985 (Appendix A, Figure 1) taking 12 lives and causing over $60 million in property damage. The inadequacy of the local drainage system was obvious during the 1985 flood, and much of this inadequacy remains today (City of Cheyenne 2005). Francis E. Warren Air Force Base (F. E. Warren AFB) has experienced flooding many times in the past. It is estimated that in the past century, the local area has experienced five major storm events. F. E. Warren AFB is located upstream from the city of Cheyenne and, via the current drainage patterns, water accumulates on base and is funneled through the main gate along Randall Avenue into the downtown Historic District of Cheyenne. During a major storm event, over 1,100 cubic feet per second (cfs) of stormwater can be channeled into the city. During the 1985 flood, the flow downtown where the damage was most severe reached 2,000 cfs; therefore, the flow contribution from base drainage is significant (Balloffet-Entranco 2001). Floods are classified according to their frequency and depth. For instance, there are 10-year, 25-year, 50- year, 100-year, and 500-year floods. A 100-year flood occurs less frequently than a 10-year flood, but because a 100-year flood carries more volume and depth of water, it is far more destructive and presents a more serious threat to human safety (CCRFCD 2005). A 100-year flood has a 1% chance of occurring in any given year. A major component of the proposed action is the construction of detention basins.


Descriptors :   *AIR FORCE FACILITIES , *DRAINAGE , *ENVIRONMENTAL ASSESSMENT , AIR QUALITY , CULTURAL RESOURCES , ENDANGERED SPECIES , FISHES , GEOLOGY , HAZARDOUS MATERIALS , HAZARDOUS WASTES , HEALTH , LAND USE , METEOROLOGY , NOISE , SAFETY , SOILS , SOLID WASTES , TOPOGRAPHY , VEGETATION , WATER RESOURCES , WETLANDS , WILDLIFE


Subject Categories : Hydrology, Limnology and Potamology
      Logistics, Military Facilities and Supplies
      Water Pollution and Control
      Environmental Health and Safety


Distribution Statement : APPROVED FOR PUBLIC RELEASE