1. Preliminary Report (work incomplete), Mixed-source Lands Assessment1 ESHMC Meeting 13 November 2007 B. Contor PRELIMINARY REPORT Investigation of Mixed-source Lands

2. Preliminary Report (work incomplete), Mixed-source Lands Assessment2 Questions to be Answered MODEL CALIBRATION –How good is current spatial distribution? MODEL USE –What is actual physical GW fraction? –Can actual fraction change period-to-period? –How much ability to switch sources in short time frame? SOFT CONVERSIONS –Ability to deliver supplemental SW? –Infrastructure improvements needed?

3. Preliminary Report (work incomplete), Mixed-source Lands Assessment3 Approach 300 random sample points on nominal mixed- source lands New (2007) water-right data download Pilot: 9 sites nearest Idaho Falls –GIS WR review –e-file WR review –WMIS paper-file review –Field inspection

4. Preliminary Report (work incomplete), Mixed-source Lands Assessment4 Approach 2-stage review based on pilot –GIS WR review of 291 more sites –e-file WR review of 291 more sites –Field inspection of sub-sample ~ 50 sites Review of WMIS pumping & SW deliveries Review of canal capacity –capacity implied by delivery records –manager survey

5. Preliminary Report (work incomplete), Mixed-source Lands Assessment5 Where are we? Pilotcomplete GIS WR review complete e-file WR review~ 60 sites Field inspection ~ 30 sites WMIS/SW delivery reviewnot started Canal capacitystarted

6. Preliminary Report (work incomplete), Mixed-source Lands Assessment6 What do we know?

7. Preliminary Report (work incomplete), Mixed-source Lands Assessment7 What do we know? (n = 62)

8. Preliminary Report (work incomplete), Mixed-source Lands Assessment8 What do we know? (n = 30)

9. Preliminary Report (work incomplete), Mixed-source Lands Assessment9 What do we know? (of the 13)

10. Preliminary Report (work incomplete), Mixed-source Lands Assessment10 SW-onlyGW-only True "Mixed Source"Ambiguous Currently receive SW Preliminary SW-delivery potential on Nominal Mixed-source Lands Some parcels could receive SW, some have obstacles

11. Preliminary Report (work incomplete), Mixed-source Lands Assessment11 Soft Conversions Could reasonably receive additional SW supplies as available Can't Convert SW-only GW-only

12. Preliminary Report (work incomplete), Mixed-source Lands Assessment12 Caution! Working N to S - not yet a random sample! WR issues in one canal company Some "mixed" have actually very small % GW supplies via canal - in "field inspection" we called these "SW" A few "mixed" sites are supplied from tribs; may not be sufficient supply to work an exchange w/ Snake-river Storage for soft conversions

13. Preliminary Report (work incomplete), Mixed-source Lands Assessment13 Input needed from ESHMC With only a small percentage of parcels physically supplied by both sources, is there any need to expend lots of resources in reviewing WMIS data?

14. Preliminary Report (work incomplete), Mixed-source Lands Assessment14