James River at Buchanan, Botetourt County VA (BNNV2)
Gage Location: Botetourt County, Virginia	Site Location: Botetourt County, Virginia
Latitude: 37.531	Longitude: -79.679	Elevation: 802.9 ft. MSL	Drainage Area: 2073 Sq. Mi.
Minor Stage: 17 ft.	Moderate Stage: 21 ft.	Major Stage: 26 ft.
First Flood: 1877-10-03	Last Flood: 2013-05-08 Crest: 19.58 ft.	Datum change: 1927-07-10	Number of Floods: 74

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Month Number of Floods After Datum Number of Floods Total Cumulative Total After Datum Cumulative Total January 9 10 9 10 February 7 9 16 19 March 12 19 28 38 April 7 9 35 47 May 7 8 42 55 June 4 5 46 60 July 0 0 46 60 August 1 1 47 61 September 1 1 48 62 October 2 4 50 66 November 2 4 52 70 December 4 4 56 74 Seasonal Totals Winter (Dec-Jan-Feb) 23 Spring (Mar-Apr-May) 36 Summer (Jun-Jul-Aug) 6 Fall (Sep-Oct-Nov) 9

Codes and description

C1|Crest information looks unreliable and incomplete and not used in frequency calculations. Some of the floods are based on current flood stage and nearby gage information.
C2|Crest information looks reliable despite potential problems. This data was used in frequency calculations.
C3|Crest height estimated by the USGS.
C4|Crest height is from the National Weather Service.
C5|Crest height affected by backwater.
C6|Crest occurred at a previous flood stage that is lower than the current flood stage. The crests below the new flood stage are not used in flood frequency calculations.
C7|Crest from USGS yearly peak and/or date is different than the crest we provide. In many cases MARFC uses crest based on backwater or ice effects.
C8|Crest month or day of occurrence has been estimated by The Middle Atlantic River Forecast Center usually based on nearby gage information.
C9|Crest date (day) in the month is unknown.
F1|Flow is an estimate.
F2|Flow affected by regulation or diversion and in some cases to an unknown degree.
F3|Flow effected by snow-melt, ice jam or debris jam break up.
F4|Flow affected by dam failure.
F5|Flow - All or part of the record affected by urbanization, mining, agricultural changes, channelization or other factors.
G1|Gage height at a different site and/or datum.
G2|Gage is not an official USGS gage with crests provided by the NWS. Crest information looks unreliable and incomplete and not used in flood frequency calculations.
G3|Gage datum changed during this year.
none,No code; Good Data

Updated: 09:52 AM May 13, 2013