Per OKC Water Utilities: Hefner can't receive water from any other pipelines, wells, ..., only rain run off & Canton Lake; Hefner is only source for nearly 200k NW OKC residents; Before the release Hefner was nearly 2/3 full (40,000 ac- ft)and using USGS website gauge numbers for water loss out of Hefner, the following calculations were made: At 12 month average usage from Hefner and only drawing down 1/2 of the Hefner pool, their water would last nearly 200 days without rain or Canton Lake water. If Hefner receives rain and rain runoff this would extend the 200 days further. Hefner's normal pool is 60,000 ac-ft. Before release Hefner is at 40,000 ac-ft. Of Canton Lake's 30,000 ac-ft release, 20,000 should reach Hefner, thus bringing it to normal or possibly above normal level since the riverbed was wet from recent rain.
If any rain at all occurs in or upstream from Hefner, what will OKC do with this surplus water? I might guess, let if flow into Overholser. Overholser water can conveniently flow into downtown OKC , or could it go on by Overholser into the Oklahoma River. Hmmm
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