A computer program for hydraulics of bridge waterways.

Cover title: Electronic computer program for hydraulics of bridge waterways (BPR program HY-4)

Hydraulic analysis of box culverts.

Errata sheet inserted.

Flood record compilation and frequency plot.

Cover title.: Electronic computer program for flood record compilation and frequency plot (BPR program HY-5) Developed by: U. S. Dept. of Commerce, Bureau of Public Roads.