U.S. Army Corps of Engineers, Pittsburgh
Operations Division
JULY 13, 2011
MEMORANDUM FOR: WATERWAYS ASSOCIATION OF PITTSBURGH
SUBJECT: JULY, 2011 Meeting
ITEMS OF INTEREST TO NAVIGATION
1. LOCK CLOSURES AND DELAYS
The Repair Party began dewatering of the auxiliary chamber at Dashields L/D on the Ohio River on
Monday July 5, 2011. This work is scheduled to be completed by August 11, 2011. Work will be
performed on the gates, gate anchorages and Miter sills (Nav Notice 11-16). The main chamber will
remain open and should result in minimum delays to navigation.
The next scheduled Repair Party work is for a reduced dewatering of the chamber at Grays Landing
L/D for 12 days beginning August 22 through Sept 2, 2011. This will be to remove, inspect/repair
the bulkhead and re-install. The river will be closed to traffic for this time period.
2. RECOMMENDED INTERNET SITES
a. Daily Navigation Conditions: www.lrd-wc.usace.army.mil/text/pitrpti.txt
b. Current River Conditions: http://wmw.lrp.usace.army.mil
c. District Navigation Notices: www.lrp.usace.army.mil/or/or-f/navrpt.htm
3. OTHER ITEMS OF INTEREST
Notice is hereby given that the USACE – Pittsburgh District will no longer send Notices to
Navigation Interests by e-mail. In order to view these notices, you must access the USACE –
Pittsburgh District web page at www.lrp.usace.army.mil/or/or-f/navrpt.htm.
USACE will continue to send electronic version of Notices to Navigation Interests to USCG
(United States Coast Guard) and the Waterways Association.
River Navigation Charts are available by calling the Government Printing Office Book Store at
866-512-1800.
/signed/
JAMES R. FISHER
Acting Chief, Operations Division
RIVER AND WEATHER CONDITIONS
Prepared for Waterways Assn. of Pittsburgh Meeting 07/13/11
National Weather Service Forecast Office, Pittsburgh PA
For the latest river and weather forecasts--http://www.weather.gov/pittsburgh
WEATHER RECAP
After four months of above normal precipitation across the region, most of the area experienced at or below normal
rainfall in June. The driest conditions were in the Allegheny River basin. Temperatures for June were above
normal.
A northwest to southeast oriented stationary front oscillated over the southern half of the region from 17-20 June
producing small stream flooding and the most significant rises of the month on the Monongahela and main stem
Ohio Rivers.
Overall for the month rainfall averaged about 3.0 inches in the Allegheny River basin or 2.0 inches below normal. In
the Ohio and Beaver River basins rainfall averaged about 3.5 inches or 0.75 below normal. Rainfall was near
normal in the Monongahela River basin averaging about 4.5 inches.
At the Pittsburgh International Airport monthly precipitation was 2.50 inches, which is 1.62 inches below normal. In
June temperature averaged 1.6 degree/day above normal.
For the first 12 days of July, temperatures averaged 3.1 degrees above normal. Precipitation was 0.78 inches,
which is 0.82 of an inch below normal. Rainfall since January 1st was 25.36 inches, which is 4.46 inches above
normal.
RIVER FLOWS
Rivers in the upper Ohio River Valley generally receded for the first 15 days of June. The 17-20 June rain event
across east-central Ohio, southwest Pennsylvania and northern West Virginia produced rises of 3 – 6 feet on the
Monongahela River, and 2-3 feet on the Ohio River. There were no significant rises on the Allegheny River.
HIGH WATER POTENTIAL
The high water potential is normal. Currently flows are 80-90% of normal on the Allegheny River, 100-120% of
normal on the Monongahela River, and near normal on Ohio River. Rainfall of 2.5 – 3.0 inches in 6-12 hours is
needed to bring rivers to bank full.
WEATHER FORECAST
Today: Becoming mostly sunny. High near 80.
Tonight: Mostly clear. Low in the upper 50s.
Thursday: Sunny. High near 80.
Thursday Night: Partly cloudy. Low around 60.
Friday: Partly sunny. High in the lower 80s.
Friday Night: Mostly cloudy. Low in the mid 60s.
Saturday: 30% chance of afternoon thunderstorms. High in the lower to mid 80s.
Saturday Night: Mostly cloudy. Low in the upper 60s.
Sunday: Partly sunny. High in the upper 80s.
Monday: Mostly sunny. Low in the mid 60s. High near 90.
Tuesday: 30% chance of thunderstorms. Low in the upper 60s. High near 90.
8-14 Day Outlook…above normal temperature and above normal rainfall.
July Outlook...near normal temperatures and rainfall.
Aug-Sep-Oct Outlook…above normal temperatures and near normal rainfall.