Gauge Description:

The USGS gauge is approximately 30 miles upstream. At times of rapid waterlevel change, there is approximately a 20 hour delay from the level at Riverton to this playspot in Petersburg.

The drainage area at Petersburg is 3,063 square miles, whereas the drainage at the gauge in Riverton is 2,618 square miles. Thus, one might expect (on average) the actual flow at this playspot to be 1.17 times (or 1 and 1/6th as much as) the flow on the cited gauge.

Gauge/flow analysis based on Riverton gauge 1908 to 2008:
Minimum mean daily flow during stated period: 3 cfs (1914.10)
90% of time flow exceeds: 84 cfs
10% of time flow exceeds: 3,490 cfs
Maximum mean daily flow during stated period: 67,700 cfs (1943.05.19)
10/90 ratio ('flashy-ness'): 41.5 (under 3 is fairly steady, over 10 is quite 'flashy')

Average days per year over recommended 'low' threshold (75 cfs): 223

Gauge Information

Name Range Difficulty Updated Level
SANGAMON RIVER AT RIVERTON, IL
usgs-05576500 200 - 4000 cfs I-II 01h48m 357 cfs (running)
gauge class Low to low-moderate flow. (Under 4.5')
Gauge (2618 sq.mi. drainage) is well upstream. At Petersburg (3063 sq.mi. drainage) flows may be ~1/6th again as high (I.E. 1.17*gauge).
gauge graph
RangeWater LevelDifficultyComment
0 - 75 cfs extremely Low-somewhat Low III gauge is important or has warning Terribly low.
75 - 200 cfs somewhat Low-barely Low I-II gauge is important or has warning Very low, but some play possible.
200 - 500 cfs barely runnable-med runnable I-II gauge is important or has warning Low to low-moderate flow. (Under 4.5')
500 -1000 cfs barely runnable-med runnable I-II gauge is important or has warning Low-moderate to moderate flows. (~4.5' - 6.0')
1000 -2000 cfs med runnable-a bit pushy runnable II-III gauge is important or has warning Moderate flow. (~6.0' - 8.5')
2000 -3000 cfs med runnable-a bit pushy runnable III gauge is important or has warning Moderately-High flow. (~8.5' - 10.6') (Possibly optimum for well-skilled play-boaters!)
3000 -4000 cfs a bit pushy runnable-high runnable III gauge is important or has warning High-Moderate to High flows. (~10.6 - 12.25')
4000 -10000 cfs somewhat High-somewhat High III+ gauge is important or has warning Very high flow. (~12.25' - 18.3')
10000 -70000 cfs somewhat High-extremely High III+ gauge is important or has warning Unusually high flow

Reports give the public a chance to report on river conditions throughout the country as well as log the history of a river.

When River/Gauge Subject Level Reporter
Sangamon [IL] Beginner's first surf 300 clinton begley
Sangamon River [IL] Throwing ends in Dead Carp Drop 2500 cfs Erik Johnson
> 10 years sangamon [il] Clint at dead carp drop 435 cfs clinton begley
> 10 years Sangamon River [IL] Perfect level @ DCD 9 feet Erik Johnson
> 10 years Sangamon River [IL] n/a Jeff Abernathy