| Flood Impacts |
| 15.0 | RECORD FLOODING AT FARAD AND NEAR RECORD TO RECORD FLOODING ON ENTIRE MAINSTEM TRUCKEE. DISASTROUS FLOODING OF BUILDINGS...ROADS AND BRIDGES IN VERDI-MOGUL AREA. TRANSPORTATION NEARLY CUT OFF IN ALL DIRECTIONS TO/FROM RENO/SPARKS. AT ABOUT 19000 CFS...THIS IS WELL OVER THE USGS ESTIMATED 100 YEAR FLOOD...AND FARAD RECORD STAGE OF 14.4 FEET...RECORD FLOW OF 17500 CFS...BOTH SET 11/21/50. |
| 14.5 | FLOOD DISASTER FROM BOCA DOWNSTREAM TO NIXON. NEAR-RECORD FLOODING OF BUILDINGS...ROADS AND BRIDGES IN THE VERDI-MOGUL AREA. ABOUT 17800 CFS...EQUAL TO THE RECORD FLOOD AT FARAD ON 11/21/50...AND TO THE USGS 100 YEAR FLOOD...WITH A 1 PERCENT CHANCE OF BEING EXCEEDED ANY YEAR. TRANSPORTATION IN/OUT OF REGION EXTREMELY DIFFICULT. |
| 14.0 | DISASTROUS...NEAR RECORD FLOODING FROM BOCA TO MOGUL WITH EXTENSIVE DAMAGE LIKELY TO LOW LYING STRUCTURES ALONG THE RIVER. REGIONAL TRANSPORTATION SEVERELY AFFECTED...WITH MANY MAJOR ROADS FLOODED OR DAMAGED. USGS ESTIMATED CHANCE OF EXCEEDING THIS FLOW...ABOUT 16700 CFS...IS ABOUT 1.2 PERCENT IN ANY YEAR...ABOUT AN 85 YEAR RETURN PERIOD. WORSE THAN THE 3/18/1907 AND 12/11/1937 FLOODS...BUT NOT AS SEVERE AS THE FLOOD OF RECORD AT FARAD...ON 11/21/1950. |
| 13.5 | MAJOR FLOODING WITH EXTENSIVE FLOOD DAMAGE TO ROADS...BRIDGES AND STRUCTURES FROM BOCA TO MOGUL...ESPECIALLY IN THE VERDI/MOGUL AREA. TRANSPORTATION BECOMES VERY DIFFICULT...AND MOST MAJOR ROADS/HIGHWAYS IN THE AREA ARE FLOODED. SIMILAR IN IMPACT TO THE 12/11/1937 AND 3/18/1907 FLOODS...WORSE THAN 1/2/1997 FLOOD. AT ABOUT 15600 CFS...USGS ESTIMATES THAT THESE FLOWS HAVE ABOUT A 1.5 PERCENT CHANCE OF BEING EXCEEDED ANY YEAR AT FARAD...OR ABOUT A 65 YEAR RETURN PERIOD. |
| 13.0 | MAJOR FLOODING FROM BOCA TO MOGUL. AT THESE FLOWS MAJOR DAMAGE SHOULD BE EXPECTED TO LOW LYING ROADS...BRIDGES AND STRUCTURES ALONG THE RIVER...ESPECIALLY VERDI/MOGUL AREA. TRANSPORTATION SIGNIFICANTLY AFFECTED. AT ABOUT 14600 CFS...USGS ESTIMATES THAT THIS FLOW HAS ABOUT A 2 PERCENT CHANCE OF BEING EXCEEDED ANY YEAR AT FARAD...OR ABOUT A 50 YR RETURN PERIOD. SIMILAR IN IMPACT TO THE FLOODS OF JANUARY 2 1997 AND DECEMBER 23 1955. |
| 12.5 | MODERATE TO MAJOR FLOODING FROM BOCA TO MOGUL. MODERATE DAMAGE TO ROADS...BRIDGES...AND LOW-LYING BUILDINGS ESPECIALLY IN THE VERDI/MOGUL AREA. TRANSPORTATION AFFECTED WITH MANY ROAD CLOSURES. IMPACTS WORSE THAN 2/1/1963 AND 12/23/1964 FLOODS AT FARAD...BUT NOT AS SEVERE AS 1/2/1997 OR 12/23/55 FLOODS. AT ABOUT 13600 CFS...USGS ESTIMATES THIS FLOW HAS ABOUT A 2.5 PERCENT CHANCE OF BEING EXCEEDED IN ANY YEAR AT FARAD...OR ABOUT A 40 YEAR RETURN PERIOD. |
| 12.0 | MODERATE FLOODING FROM BOCA TO MOGUL...ESPECIALLY TO TRAILER AND PUBLIC PARKS IN THE VERDI/MOGUL AREA ALONG THE RIVER. SOME DAMAGE TO ROADS...BRIDGES AND LOW-LYING STRUCTURES IN THE AREA. SIMILAR IN IMPACT TO FLOODS WHICH OCCURRED ON 3/25/1928...2/1/1963...AND 12/23/1964 AT FARAD. AT ABOUT 12500 CFS...USGS ESTIMATES THAT THIS MUCH FLOW HAS ABOUT A 3 PERCENT CHANCE OF BEING EXCEEDED AT FARAD ANY YEAR...OR AT ABOUT A 33 YEAR RETURN PERIOD. |
| 11.5 | MINOR TO MODERATE FLOODING FROM BOCA TO MOGUL...ESPECIALLY TO TRAILER AND PUBLIC PARKS IN THE VERDI/MOGUL AREA ALONG THE RIVER. SIMILAR IN IMPACT TO 2/1/1963 AND 12/23/1964 FLOODS AT FARAD. AT ABOUT 11500 CFS...USGS ESTIMATES THAT THIS MUCH FLOW HAS ABOUT A 4 PERCENT CHANCE OF BEING EXCEEDED ANY YEAR AT FARAD...OR AT ABOUT A 25 YEAR RETURN PERIOD. |
| 11.0 | FLOOD STAGE...ABOUT 10500 CFS. MINOR LOWLAND FLOODING IN SOME LOCATIONS FROM BOCA TO MOGUL...ESPECIALLY IN VERDI/MOGUL AREA. USGS ESTIMATES THAT THIS MUCH FLOW HAS ABOUT A 5 PERCENT CHANCE OF BEING EXCEEDED ANY YEAR AT FARAD...OR AT ABOUT A 20 YEAR RETURN PERIOD. |
| 10.5 | NO FLOODING BOCA TO MOGUL...BUT NEAR BANKFULL IN PORTIONS OF THE VERDI/MOGUL AREA. AT ABOUT 9500 CFS...USGS ESTIMATES THAT THIS MUCH FLOW HAS ABOUT A 7 PERCENT CHANCE OF BEING EXCEEDED IN ANY YEAR AT FARAD...OR AT ABOUT A 15 YEAR RETURN PERIOD. |
| 10.0 | NO FLOODING FROM BOCA TO MOGUL...INCLUDING FLORISTON AND VERDI AREAS. AT ABOUT 8600 CFS...USGS ESTIMATES THAT THIS MUCH FLOW HAS ABOUT A 9 PERCENT CHANCE OF BEING EXCEEDED IN ANY YEAR AT FARAD...OR ABOUT A 12 YEAR RETURN PERIOD. |
| 9.5 | NO FLOODING FROM BOCA TO MOGUL...INCLUDING THE FLORISTON AND VERDI AREAS. AT ABOUT 7800 CFS...USGS ESTIMATES THAT THIS MUCH FLOW HAS ABOUT A 10 PERCENT CHANCE OF BEING EXCEEDED IN ANY YEAR AT FARAD...OR A 10 YEAR RETURN PERIOD. |
| 9.0 | NO FLOODING FROM BOCA TO MOGUL...INCLUDING FLORISTON AND VERDI AREAS. AT ABOUT 7000 CFS...USGS ESTIMATES THAT THIS MUCH FLOW HAS ABOUT A 13 PERCENT CHANCE OF BEING EXCEEDED IN ANY YEAR AT FARAD...OR ABOUT AN 8 YEAR RETURN PERIOD. |
| 8.5 | NO FLOODING FROM BOCA TO MOGUL...INCLUDING FLORISTON AND VERDI. AT ABOUT 6100 CFS...THIS IS MAXIMUM SAFE FLOW IN LOWEST PORTIONS OF TRUCKEE MEADOWS BELOW SPARKS. RELEASES FROM PROSSER...BOCA AND STAMPEDE RESERVOIRS ARE CUT AT THIS POINT SO FLOW AT RENO DOES NOT EXCEED 6000 CFS. USGS ESTIMATES THAT THIS FLOW HAS ABOUT A 15 PERCENT CHANCE OF BEING EXCEEDED ANY YEAR AT FARAD...OR ABOUT A 7 YEAR RETURN PERIOD. |
| 8.0 | NO FLOODING FROM BOCA TO MOGUL...INCLUDING FLORISTON AND VERDI. AT ABOUT 5300 CFS...USGS ESTIMATES THIS FLOW HAS ABOUT A 20 PERCENT CHANCE OF BEING EXCEEDED ANY YEAR AT FARAD...OR ABOUT A 5 YEAR RETURN PERIOD. |
