The number on the clear creek gauge for golden is calculated according to the following formula...
golden estimate = [email protected]
lawson + fall river (trib) + chicago creek (trib) + north clear creek (trib).
This represents the lowest clear creek gauge that is still working, with the addition of all the gauged tributaries that come in below it.
I pulled the data on these gauges from last year and compared the sum of the flows to clear creek at golden. For most of the season the sum was pretty much spot on to the golden flow (withing 5%). Early season is the only time that it was off. Low elevation snow can add some water from the normally dry washes between north clear creek and golden. If you want a guesstimate, tack on an extra 20% to the estimated golden number for early pre-peak flows.
I sent this info to the eddyflower guys and they put the calculation up.
Based on the data I looked at I'd say its a good estimate.