Navigation Notice: Monongahela River

Braddock Locks and Dam
Monongahela River Mile 11.2 Closure of Primary Chamber


EFFECTIVE: 04/04/2022 06:00 thru 04/07/2022 20:00 EDT


1.  TO WHOM IT MAY CONCERN: Notice is given that the U.S Army Corps of Engineers Repair Fleet will be working to perform repairs on the 110-ft x 720-ft primary chamber from April 4th through April 7th as indicated in paragraph 2.

2. CLOSURE PERIODS: The schedule of chamber closures is as follows:

The primary chamber will be closed from April 4th at 0600 through April 7th at 2000

3. AUXILIARY CHAMBER PROCEDURES: The Corps will institute the following lockage procedure which has been developed in cooperation with the Waterway Association of Pittsburgh. Boat locking order will be determined by arrival time at Braddock L/D, and all pilots should radio Braddock L/D at normal arrival points. Red flag barges must be reported by the pilot during this radio call. All tows must be ready to lock when added to the tier sheet. No adding or swapping of barges will be allowed once the tow’s lock turn has been established. No crew changes, taking on stores etc. will be permitted during the closure. These activities will need to be arranged at landings or other approved locations and must not impede the lockage process.

Because of approach conditions (out drafts and short river guard walls), it is recommended that users limit their tow size to no more than a triple lockage. Due to the location of the tow haulage equipment and the length of the upper and lower middle walls, tow configurations of less than 50-ft in width will require self- help. Under normal river conditions the Lockmaster will allow, if requested by the pilot when calling for position of the tow, a towboat to lock through with a maximum of five (5) cuts, or fifteen barges. No building, staging or reassembly of tows on the Lower Mooring Cell of the upper pool for the last tow of an up bound tier. This will allow a better flow of traffic and reduce delay of down bound exchange entries. By following these procedures there will be a minimal tow make-up and approach time when changing directions. Without a program of “self-help” by navigation interests, the lock can only handle up to a triple lockage with its tow haulage equipment.

4. To help eliminate some of the waiting time for towboats, an arriving tow can designate to be broken up into a maximum of three (3) separate lockages. Each tow will then be locked in accordance with the procedure outlined in paragraph 3 above. The pilot of the large tow will have to notify Braddock L/D of the intent to breakup into smaller tows and must provide the Lockmaster with the names of the other towboats designated to handle the other tows not later than six (6) hours before their lockage turn. If the designated towboat(s) are not available when called by Braddock L/D, they will lose their turn and go to the end of the waiting line.

5. During the closure of the 110-ft x 720-ft primary lock chamber, tows should move to the closest mooring cell for staging prior to their lockage turn, rather than waiting at landings. It will be necessary for tows, under normal river conditions, to follow one another on the river guard wall when a series of lockages are being made in one direction. Each tow in the series should be aware of the tow that they follow and be on the river guard wall as soon as that tow enters the lock chamber. While this practice will speed up the lockage process, it is imperative that tows exercise extreme caution when encountering out draft or backlash conditions.

6. In an effort to reduce delay time at the locks, a program of “self-help” by navigation interests is necessary. A “self-help” program will allow waiting towboats to assist tows out of the lock chamber. The Lockmaster will designate the pull boats as tows arrive for position. The second and third towboats in the first series of lockages in the opposite direction will be the designated helper boats. It will be necessary for all towboats to monitor their radios 24 hours a day.

7. Other specific procedures to facilitate lockage operations through the auxiliary lock chamber have been developed in cooperation with the towing industry. The Corps is asking for everyone’s cooperation and help in making the locking operations go as smoothly as possible during the closure of the large chamber.

a. All excess rigging will be removed prior to entering the lock chamber. Remaining rigging should be ready to be knocked loose after the cut is secured in the lock chamber.

b. All upbound lockages will require three locking lines, two on the head and one stern and must be available on each cut. All downbound lockages will require two locking lines, one head and one stern. Each line must be at least 75 feet long and 1-1/2” in diameter. To minimize locking time, all lines will stay with each cut. Lines will not be permitted to be carried from one cut to another.

c. Three deckhands are required during multiple lockages.

d. All multiple cut tows will be made up in designated staging areas, clear of the lock gates, so as not to interfere with lockage operations.

e. The Braddock lock filling system may cause turbulence and surging of water while filling the small chamber. Deckhands need to be extra vigilant in tending lines to avoid an accident which could close the locks totally.

8. Towboats are cautioned to use minimal power when operating over the lower sill to avoid forcing debris onto the miter sill. This debris could prevent the miter gates from closing and require stoppage of navigation until the material is removed by dredging or diving operations.

9. If critical industrial shipments are essential to sustain continued operation, the affected companies should immediately contact the Waterways Association of Pittsburgh at least 36 hours prior to the scheduled lockage. Only the designated cargo or barges will be given priority unless stated in the request that all barges in that tow be given priority. They will review all requests for priority before submitting them to the Corps for our consideration. If it becomes necessary to prioritize lockages through the auxiliary lock chamber, the Corps will make the final decision concerning lockage procedures as conditions and situations change. In accordance with standard Corps policy, the Lockmaster may also vary the locking procedure in an effort to equalize waiting times.

10. Information concerning lockages will be broadcast by radio on Channel 11 and any towboat not answering a call from the locks will be dropped to the end of the waiting list.

11. All towboats are to stay with their tows while waiting for lockages unless designated to assist other tows through the auxiliary lock chamber.

12. Mariners are requested to monitor marine channel 13 for updates and/or changes during the periods of chamber closures.




Vincent DeCarlo, P.E.
Chief, Operations Division