Unionid Mollusks 
73 
Coastal Plain Physiographic Province 
Cape Fear River Sub-basin 
Cumberland County 
H. Cape Fear R. near Carlos (Johnson 1970) 
I. Cape Fear R. ca. 4.8 km SW Slocomb and 9.6 km NNE 
Fayetteville (Fuller 1973, 1977) 
Bladen County 
J. Cape Fear R. ca. 4.8 km ENE Tobermoy (Fuller 1972) 
K. Cape Fear R. ca. 2.0 km ESE Duart (Fuller (1972) 
L. Cape Fear R. ca. 3.2 km S Kings Bluff (Johnson 1970) 
Columbus-Brunswick Counties 
M. Livingston Cr., precise location unknown (Johnson 1970, 
Dawley 1965) 
New Hanover County 
N. Greenfield Lake (formerly Greenfield Mill Pond) and outlet 
stream, Wilmington (Johnson 1970) 
South River Sub-basin 
Sampson County 
O. Six Runs Cr., precise location unknown (Johnson 1970) 
Northeast Cape Fear River Sub-basin 
Duplin County 
P. Northeast Cape Fear R., precise location unknown 
(Johnson 1970) 
Pender County 
Q. Ashes Cr., precise location unknown (Johnson 1970) 
an average of 38 km wide. Flows are generally in a southeasterly direc- 
tion from the headwaters in eastern Forsyth County to Moncure. 
Stream gradients fall uniformly by 1.2 to 2.1 m per mile in the upper 
two-thirds of the sub-basin, but in the lower third they vary from 0.2 to 
5.4 m per mile. The Haw River sub-basin, the most densely populated 
part of the Cape Fear watershed, includes Greensboro, Burlington, 
Graham, Chapel Hill, Pittsboro, and parts of Reidsville and Durham. 
Major tributaries of the upper Haw River include Reedy Branch, Trou- 
blesome Cr^ek, and Alamance Creek. The New Hope River, arising in 
central Orange County and joining the Haw a few kilometers above its 
confluence with the Deep River, is the major tributary of the lower 
Haw. However, B. Everett Jordan Dam, recently constructed on the 
Haw below its confluence with the New Hope, impounds the latter into 
Durham County. 
The Deep River sub-basin drains about 2,304 km 2 . Headwaters 
arise in eastern Forsyth County and flow southward to northern Moore 
County, then northeastward to the confluence with the Haw River. 
Stream gradients fall at a relatively uniform rate of 1.5 m per mile in the 
upper two-thirds of the sub-basin before leveling off to about 0.5 m per 
mile in the lower third. High Point and Asheboro, both on headwater 
tributaries, are the only major communities in the sub-basin. The only 
major tributary is the Rocky River, which arises in northeastern Ran- 
dolph County and flows southeastward through Chatham County. No 
