FINAL SITE INSPECTION REPORT

10846.0 Carty Reservoir Bomb Target1085108610871088108910901091109210931094109510961097109810991100110111021103110411051106110711081109111011111112111311141115111611176.1 History and Land UseThe Carty Reservoir Bomb Target AOC consists of a single target configured with concentriccircles (spacing not identified). This target is located on the western side of Carty Reservoir(Figure 4-1). Prior to the ASR, this target was not identified in any historical documents. It isthought that this target was the original target at the range. The ASR team believed that theoriginal Target No. 1 was located in this area and then was relocated approximately 1 mile northin approximately 1946. The target is thought to have been used between 1942 and 1945 forpractice bombing; however, the actual date of use is not known.The Carty Reservoir Bomb Target was located in a depression which made scoring difficult. Thenew Target No. 1 location (discussed in Section 4.0) is much flatter and at a higher elevation.The target name is consistent with the ASR Supplement. Figure 3-1 shows the general locationof Carty Reservoir Bomb Target AOC. Figure 4-1 shows a more detailed view of the AOC.Figure 4-2 is a photograph from 1965 and the concentric target circles can be observed. ThisAOC overlaps Target No. 1 AOC.The Carty Reservoir Bomb Target AOC is located on PGE and BAIC, Inc. (leased by ThreemileCanyon Farms) property. The western half of the AOC is currently used for irrigated farmingand the southern and eastern portion is native vegetation consisting of grasses and small trees arepresent along the shoreline of Carty Reservoir. There is evidence of historical livestock grazingin the area. The terrain slopes toward Carty Reservoir. No groundwater wells are located withinthe boundary of this AOC. Carty Reservoir covers approximately 30 percent of the area.6.2 Previous InvestigationsThe ASR team visited the Carty Reservoir Bomb Target and identified live practice bombs nearthe target center. The Army EOD was notified by PGE and disposed of five suspected livepractice bombs (USACE, 1997, Appendix M2). MEC and MD identified by the ASR teamincluded Mk-23, M38A2 practice bombs, and M75 and M84 target marker bombs.One surface water sample was collected from Carty Reservoir during the PA/SI and analyzed forperchlorate. Note that the water for Carty Reservoir is pumped from the Columbia River.6.3 MEC EvaluationLikely range munitions used at this AOC was the Mk 23, and M38A2 practice bombs and theM75 and M84 target marker bomb. The Mk 23 practice bombs were constructed from cast ironand contained black powder and a red phosphorus pyrotechnic signal charge. The M38A2practice bombs were a sand-filled sheet metal cased 100-lb practice bomb and contained a blackpowder spotting charge. The M75 and M84 target marker bombs were cased in sheet metal andBoardman AFR Final SI Report.doc 6-1 Contract No. W912DY-04-D-0010 Delivery Order No. 003September 2007