B. EVERETT JORDAN DAM AND LAKE PROJECT CAPE FEAR RIVER BASIN, NC PERTINENT DATA Other names Was known as the New Hope project until 1973 when the name was changed to honor the former Senator from North Carolina, B. Everett Jordan. Location of dam At Latitude 35 34', Longitude 79 04'; in Chatham County, NC, about 25 miles southwest of Raleigh, North Carolina; 4.2 river miles above the mouth of the Haw River; about 59 miles upstream from Fayetteville, NC; 174 miles above Wilmington, NC; and 202 miles above the mouth of the Cape Fear River. Purposes For flood control, water supply, recreation, fish and wildlife enhancement, and augmentation of low flows for purposes of pollution abatement and water-quality control in the Cape Fear River Basin. Drainage areas Location (square miles) Haw River at US 64 near Pittsboro, NC -------------------- 1,296 Haw River at B. Everett Jordan Dam ----------------------- 1,690 Deep River at Moncure, NC -------------------------------- 1,434 Deep River at mouth near Haywood, NC --------------------- 1,441 Cape Fear River at Lillington, NC ------------------------ 3,464 Cape Fear River at Fayetteville, NC ---------------------- 4,395 Cape Fear River at William O. Huske Lock and Dam No. 3---- 4,852 Cape Fear River at Lock and Dam No. 2 -------------------- 5,017 Cape Fear River at Lock and Dam No. 1 -------------------- 5,255 Cape Fear River at Brunswick River at Wilmington, NC ----- 8,760 Cape Fear River at Mouth --------------------------------- 9,140 Reservoir data Runoff Storage volumes: Inches Acre-feet Spillway design flood (elev. 261.5) ------- - 1,646,560 Standard project flood (elev. 246.2) ------ - 965,940 Top of flood control pool (elev. 240.0) --- - 753,560 Top of conservation pool (elev. 216.0) --- - 215,130 Bottom of conservation pool (elev. 150.0)-- - 0 Uncontrolled flood storage (240.0-261.5) -- 9.91 893,000 Controlled flood storage (216.0-240.0) ---- 5.97 538,430 Conservation storage (150.0-216.0) -------- 2.39 215,130 Sedimentation ----------------------------- 0.83 74,700 Water supply ------------------------------ 0.51 45,810 Water quality ----------------------------- 1.05 94,620 Surface areas (ft., m.s.l.): Acres Spillway design flood (elevation 261.5) -------------------- 51,830 Standard project flood (elevation 246.2) ------------------- 37,130 Top of flood control pool (elevation 240.0)----------------- 31,800 Top of conservation pool (elevation 216.0)------------------ 13,940 Bottom of conservation pool (elevation 150.0) -------------- 0 Reservoir coverage: Counties affected -------------------- Chatham, Wake, Durham, Orange Length at elevation 216: Miles Along Haw River -------------------------------------------- 5 Along New Hope --------------------------------------------- 18 Length of shoreline at elevation 216 (miles) ------------------ 200 Elevation Reservoir Event or Level (ft., m.s.l.) Spillway design flood ---------------------------------- 261.5 Standard project flood --------------------------------- 246.2 Flood of record (September 1945) ----------------------- 242.1 Top of flood control pool (spillway crest) ------------- 240.0 Top of conservation pool (bottom of flood pool) -------- 216.0 Bottom of conservation pool (top of sedimentation pool) - 202.0 Upper clearing limit (except for fish drops) ----------- 217.0 Elevation of guide acquisition line ------------ 245 feet, m.s.l. 5 feet vertically above top flood pool or 300 feet horizontally from top flood pool, whichever encompasses the most area. Dam and spillway Type -------------- Earth and rockfill (zoned), with side channel uncontrolled spillway, multilevel intake structure, and oblong-shaped conduit. Length of dam (feet) ------------------------------------ 1,330 Length of spillway crest (feet) ------------------------- 800 Spillway capacity at elevation 261.5 (c.f.s.) ----------- 259,000 Height of dam (feet) ------------------------------------ 113 Freeboard (feet) ---------------------------------------- 5.0 Elevation (feet, m.s.l.) Top of Dam ---------------------------------------------- 266.5 Base of Dam --------------------------------------------- 154.0 Spillway crest ---------------------------------------- 240.0 Outlet works Intake tower: Conduit intakes: Number ---------------------------------------------- 2 Size ---------------------- 9 feet wide by 19 feet high each Invert elevation (ft., m.s.l.) ---------------------- 150 Exit invert elevation (ft., m.s.l.) ----------------- 148 Multilevel intakes: Number ---------------------------------------------- 8 Type -------------------------------------------- Drop-inlet Size: Front --------------------------- Two, 6 feet square, invert elevations 181' and 188' Front --------------------------- Two, 8 feet square, invert elevations 197' and 209' Left side (east) ---------------- Two, 8 feet square, invert elevations 201' and 203' Right side (west) --------------- Two, 8 feet square, invert elevations 205' and 207' Conduit length (feet) ------------------------------------ 362.5 Conduit equivalent diameter (feet) ----------------------- 19 Maximum discharge at elevation 216 (c.f.s.) (approx.) ---- 14,000 Stilling basin: Minimum width (feet-inches) ------------------------ 16-8 Maximum width (feet-inches) ------------------------ 57-3 Length (feet-inches) ------------------------------- 239-6 Bottom elevation (ft., m.s.l.) --------------------- 143.0 End sill elevation (ft., m.s.l.) ------------------- 148.0 Tailwater elevations (ft., m.s.l.): Spillway design flood ------------------------------ 201.5 Standard project flood ----------------------------- 186.0 Flood of record (September 1945) ------------------- 174.0 Minimum (40 c.f.s.) -------------------------------- 158.1 Estimated natural streamflow at dam (flow c.f.s.) Mean discharge for period of record (1929-1989) -------- 1,621 Minimum discharge: Instantaneous (13 September 1954) ----------------- 5.4 Daily (20 September 1953) ------------------------- 8 Monthly (October 1951) ---------------------------- 60 Maximum discharge: Highest known (18 September 1945) ----------------- 120,000 Monthly (September 1945) -------------------------- 10,000 Bankfull discharge (approximate for downstream reach) -- 20,000 Standard project flood (flow c.f.s.) Maximum estimated outflow ------------------------------- 48,400 Maximum estimated inflow -------------------------------- 262,000 Spillway design flood Derivation: Rainfall area-depth-duration derived by the Hydrometeorological Section of the National Weather Service at the request of the Office of the Chief of Engineers (OCE) Total average rainfall (inches) ------------------------- 22.0 Initial loss (inches) ---------------------------------- 0.63 Average infiltration rate (inches per hour) ------------ 0.04 Total storm runoff (inches) ---------------------------- 19.35 Peak inflow to full reservoir (c.f.s.) ----------------- 511,000 Regulated peak outflow (c.f.s.) ------------------------ 259,000 Total project construction cost ----------------------- $146,300,000