NORTHEAST OREGON SMOKE INTRUSION REPORT

Date of Intrusion: 9/26 – 9/27 	Area Impacted: City of La Grande 

Time Impact Began:	9/26/06   2100 BSCAT of 2.30 (Moderate)
9/26/06   2200 BSCAT of 7.7 (Heavy)

Number of Hours of Impact:  9/26 – 9/28, 14 hours moderate, 19 hours of heavy intrusion.

Were impacts:		Measured on nephelometer:  Yes
			Visually observed:  Yes
			Reported by public: Yes
			Other (describe): ____________________________________

Duration of impact: 33 hours.

Minimum reported visibility > 1 mile 
Maximum nephelometer value of  309.5  occurred at 0300 on 9/27
Average nephelometer values:
	For the three hours before the impact began: .54
	For the three hours after the impact ended: .67

DESCRIPTION OF BURN (S)

Smoke management 				Tons		Legal			Ignition
Number			Acres		Burned		Description		Date/Time									
065061018108		2000		6440		T2 S R 36E Sec 29	9/25 1100
064061018109		1500		11076		T3 S R 35E Sec 2	9/25 1100

COMMENTS:  (Were the forecasts/instructions adequate?  Any suggestions to avoid a recurrence?  Multi-day burning?  Aerial extent of burning?  Other burning?

Information shared between the forecaster and the requesting burn agency needs to be thorough enough that both parties have the same understanding of what the plan is, especially if a written forecast from the internet is not available.  Things to discuss in detail include: size of burn units, location (emphasizing distance to smoke sensitive areas), anticipated total number of burn days, acres per day, expected tons per acre, expected smoldering into the night and potential diurnal flow, and other pertinent environmental conditions.  The forecaster’s instruction should be in writing and include the burn info that was given to them by the requesting burn agency.  

Other recommendations would be to layout units to accommodate burning smaller acres if environmental conditions change and burning needs to be curtailed.  

Report prepared by:  Trish Wallace,			Date: 9/28/06
Forest or District: WWNF, La Grande R.D. 		Phone:  541-962-8553
Edit/Review by: Ken Rockwell, W-W AFMO      	Date: 10/3/2006

ODF Smoke Management notified approximately 0900 9/27 of smoke intrusion into LaGrande.
FOR ODF USE:  INTRUSION NO. NEO: _06-01_