Flow Issues
#	Issue	Type	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Mean	Comments
1	Aesthetic Considerations	tar	-	-	-	-	-	-	-	-	-	-	-	-	-	Use as a test for other issues
2	Aquatic Weeds	non	-	-	-	-	-	-	-	-	-	-	-	-	-	Related to sewage, not primarily a flow issue
3	Canoeing	min	-	-	-	-	60	60	60	60	60	60	-	-	-	Minimize rate of change of water levels
4	Cattle Wandering	min	-	-	-	-	50	50	50	50	50	50	-	-	-
5	Changes in nature of river	sha	-	-	-	-	-	-	-	-	-	-	-	-	-	Natural flow pattern desired
6	Cheslatta Fan	non	-	-	-	-	-	-	-	-	-	-	-	-	-
7	Damage-Murray/Cheslatta	tar*	6.1	5.7	5.2	6.7	28.6	44.9	31.0	18.7	11.5	8.0	7.2	6.5	15.0	Releases from Skins Lake, based on C Mitchell model
8	Downstream Licensing (Irrigation)	min	-	-	-	-	23	0	28	13	-	-	-	-	-	Required flow to insure additional licensing in reach 2
9	Economic Dev.-NW & NorWC		-	-	-	-	-	-	-	-	-	-	-	-	-
10	Economic Development-Southside	tar*	6.1	5.7	5.2	6.7	28.6	44.9	31.0	18.7	11.5	8.0	7.2	6.5	15.0	Same as issue 7
11	Fish - Murray/Cheslatta	tar*	6.1	5.7	5.2	6.7	28.6	44.9	31.0	18.7	11.5	8.0	7.2	6.5	15.0	Same as issue 7
12	Fish - Nechako Reservoir	non	-	-	-	-	-	-	-	-	-	-	-	-	-
13	Float Plane Operations	min	-	-	-	-	41	41	41	41	41	41	-	-	-	Minimize rate of change of water levels
14	Flooding	max	55	55	55	283	283	283	283	283	283	55	55	55	-	Minimize winter (ice cover) flow fluctuations
15	Hydroelectric - Kemano	max	-	-	-	-	-	-	-	-	-	-	-	-	51.7	Max average based on Alcan's request for additional 5 cms
16	Hydroelectric - Kenney Dam	min*	26.4	26.4	26.4	26.4	26.4	26.4	26.4	26.4	26.4	26.4	26.4	26.4	26.4	Estimate of financially viable generation at Kenney Dam
17	Municipal Sewage Treatment	non	-	-	-	-	-	-	-	-	-	-	-	-	-	Will not affect minimum flows, system upgrade required
18	Nechako Reservoir Levels	non	-	-	-	-	-	-	-	-	-	-	-	-	-
19	Recreational User Safety	non	-	-	-	-	-	-	-	-	-	-	-	-	-	Not a volume requirement; minimize river fluctuations
20	Resident Fish - Nechako	min	-	-	-	-	104	-	-	-	-	-	-	-	-	Required flow to achieve fish periodicity model in Reach 3
21	Sedimentation	min	-	-	-	-	-		-	-	-	-	-	-	-	Seasonal flow pattern/freshet, minimize peak flow changes
22	Semi-aquatic Fur Bearers	sha	-	-	-	-	-	-	-	-	-	-	-	-	-	Spring freshet desired, stable flows through fall/winter
23	Water Quality - Recreation	non	-	-	-	-	-	-	-	-	-	-	-	-	-
24	Water Temperature - Sockeye	min	-	-	-	-	-	-	87/111	75/92	-	-	-	-	-	Total cooling flow for July 15 to Aug 17 for 10 and 14 degree water
25	Water Volume - Chinook	max	85	85	85	85	85	283	283	283	125	125	85	85	-	Nov to Mar (winter) flows > 50% Sep/Oct flows
	NFCP Directed Flows	min*	30	30	30	35	49	49	49	49	30	30	30	30	36.8	Monthly releases specified by NFCP at Skins Lake
	NFCP Directed Flows plus inflows	min	30.8	30.6	30.7	41.2	65.3	59.2	54.2	50.8	31.8	31.7	31.7	30.9	40.8	Monthly releases specified by NFCP plus a natural inflow of 4 cms
Reference Flows
	High Year '97		56.8	56.6	56.9	71.0	149.0	281.0	345.0	289.0	86.2	88.1	66.4	57.9	135.1	Flood year
	Low Year '98		31.7	31.4	31.1	36.5	60.6	55.8	119.0	146.0	37.3	33.0	33.5	32.7	54.4	Drought year
	Avg '81-'99		35.4	35.2	36.3	55.5	69.7	69.9	161.9	170.1	41.7	44.1	42.0	35.9	66.9	Including "spilled" water
	Estimated inflows		0.8	0.6	0.7	6.2	16.3	10.2	5.2	1.8	1.8	1.7	1.7	0.9	4.0	Estimate of natural inflow into Murray/Chesslatta and Nechako Canyon
	Est. NFCP+inflows+cooling '81-'99		30.8	30.6	30.7	41.2	65.3	59.2	168.7	176.1	31.8	31.7	31.7	30.9	56.7	Estimate of required releases without "spilled" water
Key/Definitions
*	- flows for these issues are specified at a location other than the Cheslatta gauge
sha	- refers to the shape of the hydrograph which will address the issue; specific volume less important
non	- refers to a non flow related issue
min	- refers to an issue with a minimum flow limitation
max	- refers to an issue with a maximum flow limitation
tar	- target flow for this issue
-	-  there are no flow limitations for this issue during this month
	- indicates a criteria which is compromized by the proposed hydrograph
Additional Notes
1
2	Aquatic weed issue may not be solved by changes in flow.
3	60 m3/s mid May to mid October.
4
5
6
7	A proposed flow release hydrograph from Skins Lake spillway, based on a 15 m3/s mean flow distributed by % of monthly Stellako River flows.
8	Three times current license demand available for diversion in reach 2 (<5% im[act on flow). Current domestic, agriculture & agriculture licenses equal: May 0.753, Jun 0.805, Jul 0.976, Aug 0.502 m3/s.
9	Presently there are no downstream economic development initiatives envisioned which would be restricted by water license restrictions.  No current allowance for Kitimat/NCC power generation
10
11
12
13	This issue is primarily related to river fluctuations, not minimum levels.  The 41 cms limit taken from Triton work done for Utility Commision hearings.
14	Target of less than 200 m3/s at Isle Pierre during winter (ice cover) months; Vanderhoof flooding starts at 634 m3/s, Vanderhoof gauge.
15	Average flow determined by subtracting Alcan's request for additional 5 cms from required NFCP,  existing cooling and natural inflows (not including spills).  proposal.
16	Flow rate of 26.4 includes allowance for water rental but not taxation.
17
18
19	K Rood's analysis for scouring; 500 - 800 m3/s for mainstem, 300 for back channels, 50 - 60 for large course sand, 30 for fine sands.
20	Required flows at Cheslatta to achieve BCE model (Ptolemy) minimums in Reach 3; Sturgeon Recovery Team may determine different flows in future.
21
22
23
24	Range of flows shown from 10 to 14 degree cooling water and 60 cms minimum operating flow from KDRF and 30 cms (monthly flow) from Skins Lake.  These figures represent two-week averages, not monthly averages