Laserfiche WebLink
<br />File code: <br /> <br />R- Denver; <br />D - Durango <br /> <br />Note code: <br /> <br />Part code: <br /> <br />Rating: <br /> <br />indicates where the data file and supporting documentation (if available) is located, <br />by: <br />L - Lakewood; G - Grand Junction; P - Pueblo; M - Meeker; <br /> <br />indicates notes on the location, computations, or peak discharge, by: <br />I - coordinates are only to the nearest minute; <br />2 - computations and x-sections are not included; <br />3 - peak discharge due to dam failure <br /> <br />indicates the major river basin where the measurement was made, and is the first digit <br />(other than zero) of the stream gage station number for Colorado: <br />Part 6 - Platte River Basin <br />Part 7 - Arkansas River Basin <br />Part 8 - Rio Grande River Basin <br />Part 9 - Colorado River Basin <br /> <br />a quality descriptor assigned by the person making the discharge estimate; it is a <br />relative gage of the quality of the accuracy of the discharge measurement: <br />Good - within 10 percent (ideal conditions) <br />Fair - within a 15 percent possible error <br />Poor - where error might possibly be 25 percent or greater <br />Unknown - quality is not known, determined, or is absent from computations <br /> <br />Comparison With Extreme Precipitation Data Base <br /> <br />The indirect data base was compared to the extreme storm list by date. A total of 690 measurements <br />are contained in the indirect data base_ I discovered several limitations to the indirect measurement <br />file as compared to the Storm List dates of coverage. The indirect file I was able to obtain consists <br />of measurements from 1867 to 1983. Thus, storm numbers 218-254 (37 events) from years 1983 to <br />1995, are not covered by this method. In addition, little historic information is available for the period <br />1867 to 1930; nine measurements have been made for this period. One measurement (June 2, 1867 <br />at Morrison) does not have any discharge estimate; the one measurement in 1904 (May 20, Cache <br />La Poudre) is highly suspect. Several indirect measurements made during the historic period may be <br />missing (e.g. May 31,1930 Cache LaPoudre at mouth of canyon), others are of questionable quality. <br />The storm list contains 83 measurements during this period. Thus, the indirect measurement data <br />base is insufficient to match flood discharges to precipitation events during the early (historic) period <br />and new measurements (later than 1983). A reasonable comparison is for the period 1930 to 1983, <br />and includes 681 indirect measurements and 77 precipitation events (subtracting 83 events during <br />historic period, 37 events after 1983, and about 57 storms outside Colorado). <br /> <br />The two lists were compared by date of event Flood events were selected from the indirect list <br /> <br />c - 3 <br />