basin 18 yadkin-pee dee
BASIN 18
YADKIN-PEE DEE
BASIN DESCRIPTION The Yadkin-Pee Dee Basin is the northern portion of a large river system that drains central North Carolina and northeastern South Carolina. The basin is divided into four sub-basins. The headwaters of the Yadkin River drain the eastern slope of the Blue Ridge Mountains, northeast of Blowing Rock. In the upper part of the basin the Yadkin flows generally northeasterly for about 100 miles before turning south. It continues flowing southeasterly and merges with the Uwharrie River east of Albemarle, NC, to form the Pee Dee River. The Rocky River flows into the mainstem below Lake Tillery. The Pee Dee continues flowing southeastward through South Carolina, where it is known as the Great Pee Dee River, and flows into the Atlantic Ocean near Georgetown, SC. There are series of impoundments on the river in North Carolina, beginning with W. Kerr Scott Lake west of Wilkesboro. The mainstem is impounded for about 50 miles by a chain of lakes consisting of High Rock Lake, Tuckertown Reservoir, Badin Lake, and Lake Tillery. The South Yadkin River drains 909 square miles north and west of Salisbury. It flows into the Yadkin above High Rock Lake. The Uwharrie River drains 374 square miles west of Asheboro. The Uwharrie joins the Yadkin below Badin Lake and the river flows into Lake Tillery as the Pee Dee River. The Rocky River drains 1440 square miles south of Kannapolis between Charlotte and Albemarle. It flows into the Pee Dee where Richmond and Stanly counties meet. Below Lake Tillery there is one more major impoundment, Blewett Falls Lake, before the Pee Dee flows into South Carolina. WATER USE Factors Affecting Water Demand This basin is home to about 17% of the State’s residents and contains all or part of 86 municipalities in 23 counties. Three of the state’s 12 major metropolitan areas depend on this basin for water supply. From 1990 to 1997 year-round population in 13 counties in this basin grew by 10% or more. One county, Union, grew by 26% over that period. This basin supplies water to the rapidly growing Piedmont Crescent, a corridor of urban development roughly following I40 and I85 from Raleigh to Charlotte. Total Water Use in Basin The USGS’s 1995 summary of water use estimated total water use in the basin at 306 million gallons per day (mgd), with almost 80% coming from surface water sources. USGS estimated total basin population at 1,251,240. Residential water demand was estimated at 76 mgd with about 70% of this demand being supplied by public water systems. Overall, public water systems supplied 146 mgd from surface water and 6 mgd from ground water for both residential and non-residential uses. The remaining residential water demand was met by 22 mgd of self-supplied ground water. In addition, there was about 130 mgd of self-supplied water withdrawn for non-residential water uses.
Local Water Supply Plans (LWSPs) All units of local government that supply or plan to supply water to the public are required to develop a LWSP. The Division of Water Resources (DWR) reviews LWSPs and maintains a database of the LWSP information. The current database reflects water use information for 1992. LWSPs were submitted by 74 public water systems having service area in this basin or using water from this basin. These systems supplied 236 mgd of water to 1,311,123 persons. DWR estimated that 764,721of the 1,311,123 persons served by these 74 LWSP systems receive water from the Yadkin Basin. Of the 236 mgd supplied by these 74 LWSP systems, 152 mgd comes from water sources in the Yadkin Basin, with the remainder coming from adjoining basins. The following table summarizes the LWSP population served with water from this basin and their water use for 1992. 1992 LWSP System Water Use from Basin (mgd) LWSP Population
Residential Use
Non-residential Use
Total Use*
Yadkin River
560,246
34.11
54.44
111.7
So. Yadkin
55,924
4.51
3.14
9.6
Uwharrie R.
21,064
1.12
2.94
4.7
Rocky River
127,487
7.76
12.82
25.9
Total
764,721
47.50
73.3
151.9
Sub-basin
*Total Use also includes unaccounted-for water and sales to other systems.
Residential use accounted for 31% of total water use in these systems while non-residential use accounted for 48% and unaccounted-for water use represented 8%. The Yadkin Basin supplies water to some of the State’s fastest growing areas. LWSP systems expect to supply water to 2,112,020 million persons by the year 2020, a 61% increase over 1992 levels. Their demand is projected to increase 89%, from 236 mgd to 445 mgd, by 2020. In the 1992 LWSPs, 13 of the 67 systems using water from this basin reported that available supply was not adequate to meet estimated demand through 2002. DWR encourages systems to begin planning to manage and meet future water demands before average daily water use reaches 80% of a system’s available supply. Data for 1992 indicated that 12 of the 74 LWSP systems in this basin had an average demand above this threshold. By 2020, 23 systems project demand levels that will exceed 80% of their available supply.
Self-supplied Use The USGS estimated that self-supplied users, excluding power generating facilities, accounted for 152 mgd of the 306 mgd total of water used from this basin, as shown in the table below. Industrial use accounted for 46% of the self-supplied uses, followed by livestock (21%), irrigation (17%), domestic (15%), and commercial (1%) uses. USGS Estimated Self-supplied Water Use in mgd Sub-basin
Domestic
Livestock
Industrial
Commercial
Irrigation
Yadkin River
13.00
20.94
So. Yadkin
0.06
3.47
Total
39.36
0.67
19.31
93.3
5.49
0.08
2.77
11.9
Uwharrie R.
**
**
**
**
**
**
Rocky River
9.34
7.29
25.88
0.23
4.43
47.2
Basin Total
22.4
31.7
70.7
1.0
26.5
152.3
** included in Yadkin River figures
Registered Water Withdrawals Before 1999, anyone withdrawing 1.0 mgd or more of surface or ground water was required to registered that withdrawal with DWR. In this basin there are 44 registered withdrawals other than LWSP systems or power generating facilities, with the cumulative capacity to withdraw 67 mgd. All of these registered withdrawals are for surface water. In 1999, the registration threshold for all water uses except agriculture was lowered to 100,000 gallons per day. March 1, 2000 is the deadline for registering 1999 withdrawals. WATER AVAILABILITY Surface water is the primary source of water for most of the residents of the basin. LWSPs indicate that 32 water systems in these sub-basins withdraw about 144 mgd of surface water. Seventeen of these systems rely on reservoirs for all or part of their water supply. The combined demand on these reservoirs averaged about 71 mgd in 1992. The estimated available supply from these reservoirs, based on the 20-year safe yield reported in local water supply plans, is 181 mgd. Nineteen of the surface water systems submitting local water supply plans have run-of-river intakes. These intakes supplied about 72 mgd of water in 1992. The available supply from these intakes, based on information reported in local water supply plans, is about 1411 mgd. The abundant surface water supplies in this basin are due in part to the storage and releases from the impoundments along the Yadkin River. For instance, Winston-Salem has 10,800 million gallons of storage in Kerr Scott Reservoir for use as water supply. There is also a small amount of ground water usage by several LWSP systems. Local water supply plans indicate that there are 7 systems with a 12-hour ground water supply of 1.4 mgd in these sub-basins.
INTERBASIN TRANSFERS OF SURFACE WATER Across the state many water systems move surface water between sub-basins to meet their needs. The table below indicates the number of potential interbasin transfers associated with this basin. Potential Interbasin Transfers based on 1992 data Sub-basin
Number
mgd OUT
mgd IN
Yadkin River
34
13.119
4.279
So. Yadkin
13
1.337
0
Uwharrie R.
6
4.626
0
Rocky River
15
2.595
18.96
The Yadkin basin is one of the most affected basins in terms of the number of transfer and the amount of surface water transferred. Over 13 mgd of water was transferred out of the Yadkin sub-basin, and nearly 20 mgd of water was transferred into the Rocky River sub-basin in 1992. As water use and transfer amounts increase, some water systems in the basin will eventually need to obtain interbasin transfer certifications. The 1997 LWSPs will better document these transfers. SUMMARY OF INFORMATION FROM 1992LWSPs !Per capita water use in gallons per day: Sub-basin
1992
2010
Yadkin River
213
235
So. Yadkin
212
209
Uwharrie R.
114
141
Rocky River
165
196
!17systems are not connected to another water supply system !28 systems rely on purchase water as their sole supply. !Many plans are not compatible due to discrepancies with interconnection data. !These systems used 144 mgd of surface water and about only 8 mgd of ground water. !The reported raw water supply was 1555 mgd of surface water and a 12-hour groundwater supply of 1.4 mgd. !There 9 county-wide systems. !18 systems were planning new supplies in the 1992 LWSPs. !The systems are projecting significant growth, 61% in population and 89% in demand, by 2020. !About 12 mgd of additional water supply will be needed by water systems to ensure that water demands in 2010 do not exceed 80% of available supply (about 4 mgd in the Rocky River sub-basin and about 8 mgd Yadkin sub-basin). !Demand-to-Supply Ratios for 1992 and 2010: 1992 2010 # of systems reporting 74 74 # of systems reporting ratio > 1 5 11 # of systems reporting ratio > 0.8 12 13 # of systems reporting ratio > 0.5 30 35 January 2000 Draft State Water Supply Plan DENR, Division of Water Resources
VIRGINIA Sparta ALLEGHANY COUNTY
Lansing
Eden
Mount Airy Stoneville
ASHE Jefferson COUNTY
Dobson
Pilot Mountain
Mayodan
Danbury
West Jefferson
11-1 New River
STOKES COUNTY
SURRY COUNTY
18-1 Yadkin River
COUNTY
WILKES COUNTY
Boone
East Bend
Mulberry-Fairplains
Jonesville
Wilkesboro North Wilkesboro
Blowing Rock
14-1 Roanoke River
Rural Hall
Boonville YADKIN COUNTY
2-1 Haw River Winston-Salem
GUILFORD COUNTY Greensboro
Kernersville
Yadkinville
FORSYTH COUNTY
CALDWELL COUNTY
Jamestown
Caldwell Co SE Caldwell Co N
Caldwell Co W Lenoir
Love Valley Sugar Loaf WD ALEXANDER Taylorsville COUNTY Alexander Co WC
3-1 Catawba River
High Point DAVIE COUNTY Davie Co. W.S.
Mocksville IREDELL COUNTY
Alexander Co Hwy 16-S
Joyceton Water Works Hudson
Bethlehem Water District Sawmills Granite Falls
Baton WC
Caldwell Co S Rhodhiss Valdese Morganton Drexel Icard Township WC Long View Brookford Burke Co. Hickory
3-2 South Fork Catawba River
5
10
20
Thomasville
Randleman Franklinville
Cleveland
RANDOLPH Asheboro 18-3 COUNTY Uwharrie River
Spencer
Conover Catawba
Troutman
Newton CATAWBA COUNTY
18-2 South Yadkin River
Salisbury East Spencer Denton Granite Quarry
Mooresville
Maiden
Faith
Basin 18 Yadkin (Upper) 15
Archdale Deep
Statesville West Iredell Water Corp Claremont
Landis
0
2-2 River
Davidson Water Inc DAVIDSON COUNTY
Lexington
China Grove
Miles
ROCKINGHAM Rockingham Co Waterworks COUNTY
Walnut Cove
King
Elkin
atauga River WATAUGA
Madison
(unshaded basins)
ROWAN COUNTY Rockwell
Handy SD
LEGEND County Boundary
Basin Boundary
Sawmills Granite Falls Caldwell Co S
Rhodhiss
Randleman
Lexington Statesville
ard Township WC
Franklinville
Cleveland
West Iredell Water Corp Claremont
Catawba
Troutman
Newton
Hickory
CATAWBA COUNTY
18-2 South Yadkin River
Denton Granite Quarry
Mooresville
ROWAN COUNTY Rockwell
Faith
3-2 South Fork Catawba River
China Grove Landis
Lincoln Co.
Lincolnton
Siler City
Salisbury East Spencer
Maiden
LINCOLN COUNTY
Ramseur
Asheboro 18-3 Uwharrie River
Spencer
Conover
Long View Brookford
Kannapolis
CABARRUS COUNTY
Chatham Co SW
RANDOLPH COUNTY
Handy SD
2-2 Deep River
Pfeiffer-North Stanly
Robbins Star
Concord Cherryville
High Shoals
Bessemer City
Kings Mountain
Dallas Ranlo
Mount Holly Charlotte- Mecklenburg Lowell Gastonia McAdenville Belmont 3-1 Cramerton
Cabarrus Co. WSD Harrisburg
Troy Albemarle
Biscoe
Carthage MOORE COUNTY
Montgomery County Water System
Stanly Co
Candor MOWASA-Seven Lakes Oakboro
Mount Gilead MONTGOMERY Norwood COUNTY
Taylortown MOWASA-Pinehurst Foxfire Village Southern Pines Aberdeen
Catawba River
GASTON COUNTY
Grover
Mount Pleasant STANLY COUNTY
Stanley
18-4 Rocky River MECKLENBURG COUNTY
Union Co Water System
18-1 Yadkin River
Ansonville
9-1 Lumber RiverPinebluff Ellerbee
Monroe
Marshville Peachland Wingate
RICHMOND COUNTY
Polkton Wadesboro Anson Co WS Lilesville
UNION COUNTY
ANSON COUNTY
Rockingham SCOTLAND
Hamlet
9-2 COUNTY Big Shoe Heel Creek
Morven
McFarlan Gibson
Basin 18 Yadkin (Lower)
Miles 0
5
10
15
20
(unshaded basins)
Laurinburg
LEGEND County Boundary
Basin Boundary
YADKIN BASIN 1992 and 2010 Population and Water Usage as reported by LWSP systems located in or using water from this basin Water systems showing "Demand as % of Supply" above 80% should be actively planning to control and meet future demand. Water Sources: g - ground water, s - surface water, p - purchased water
18 County ALEXANDER
ANSON
CABARRUS
CALDWELL DAVIDSON
DAVIE FORSYTH
GUILFORD IREDELL
MECKLENBURG MONTGOMERY
YADKIN BASIN Water System ALEXANDER CO HWY 16 S WD ALEXANDER CO WC SUGARLOAF WD TAYLORSVILLE ANSON CO ANSONVILLE LILESVILLE MORVEN PEACHLAND WADESBORO CABARRUS CO WSD CONCORD HARRISBURG MOUNT PLEASANT CALDWELL CO N CALDWELL CO SE DAVIDSON DENTON HANDY SD LEXINGTON THOMASVILLE DAVIE CO MOCKSVILLE KERNERSVILLE RURAL HALL WINSTON-SALEM HIGH POINT MOORESVILLE STATESVILLE TROUTMAN WEST IREDELL CHARLOTTE-MECKLENBURG BISCOE CANDOR MONTGOMERY CO TROY
Water Source* p s p p s p gp p p sp p s p g p p s s p s s s s p g s s s s gp p s p p s p
Total Service Population 1992 2010 2,271 2,784 5,895 10,353 969 1,093 2,103 2,255 9,652 12,000 1,644 1,744 800 900 731 618 600 630 5,612 4,752 9,517 10,065 47,500 72,500 2,200 5,000 1,200 2,300 60 63 1,890 2,003 83,747 128,747 1,369 1,542 7,350 11,000 19,000 22,500 23,000 26,000 14,110 22,300 3,450 3,930 12,276 29,608 1,800 1,850 216,000 276,000 70,258 80,113 11,600 24,660 25,958 27,348 1,400 2,822 2,800 4,500 450,777 673,018 1,583 1,658 739 832 4,121 4,900 3,443 4,263
Total Water Use in mgd 1992 2010 0.08 0.12 1.34 1.72 0.03 0.04 0.41 0.46 4.93 7.80 0.09 0.09 0.05 0.06 0.06 0.05 0.04 0.05 1.42 1.63 0.96 1.17 6.43 9.82 0.24 0.54 0.25 0.53 0.01 0.01 0.38 0.39 7.69 11.55 0.94 1.06 0.44 0.59 3.55 4.21 2.65 3.50 1.67 2.21 0.70 1.20 1.49 3.60 0.20 0.21 42.70 55.70 11.29 16.95 1.91 3.61 5.28 6.90 0.22 0.41 0.25 0.40 68.15 122.95 0.34 0.44 0.13 0.14 2.59 4.57 0.59 0.76
mgd - million gallons per day
Reported Supply in mgd 1992 2010 0.25 0.25 3.1 3.1 0.034 0.034 0.333 1.333 -2.3 -2.3 2 2 0.116 0.166 2 2 2 2 2.5 2.5 1.261 1.261 38.5 50.5 0.239 0.239 0.072 0.072 0.011 0.011 0.378 0.378 225.5 225.5 464.666 464.666 0.334 1 13.9 13.9 12.51 15.51 89.869 89.869 3.806 3.806 1.91 1.91 0.2015 0.2015 152.99 164.99 23.5 33.5 6 6 9.5 24.5 1.2556 1.2556 1.4 1.4 128.741 296.741 1 1 0.5 0.5 1.5 1.5 1 1
Demand as % of Supply 1992 2010 31% 49% 43% 55% 100% 112% 124% 35% -214% -339% 5% 5% 42% 33% 3% 3% 2% 2% 57% 65% 76% 93% 17% 19% 100% 227% 353% 735% 100% 100% 100% 102% 3% 5% 0% 0% 130% 59% 26% 30% 21% 23% 2% 2% 18% 32% 78% 188% 99% 102% 28% 34% 48% 51% 32% 60% 56% 28% 17% 32% 18% 28% 53% 41% 34% 44% 25% 27% 173% 305% 59% 76%
Water Sources: g - ground water, s - surface water, p - purchased water
18 County RANDOLPH
RICHMOND
ROWAN
STANLY
STOKES SURRY
UNION
WATAUGA WILKES
YADKIN
YADKIN BASIN (cont.) Water System ARCHDALE ASHEBORO RANDLEMAN ELLERBE HAMLET ROCKINGHAM CHINA GROVE CLEVELAND EAST SPENCER FAITH GRANITE QUARRY KANNAPOLIS LANDIS SALISBURY SPENCER ALBEMARLE NORWOOD OAKBORO PFEIFFER-NORTH STANLY WA STANLY CO KING DOBSON ELKIN MOUNT AIRY PILOT MOUNTAIN MARSHVILLE MONROE UNION CO WINGATE BLOWING ROCK MULBERRY-FAIRPLAINS WA NORTH WILKESBORO RONDA WILKESBORO BOONVILLE EAST BEND JONESVILLE YADKINVILLE
Water Source* p s sp p s sp gp g p g p s s s p s s p p p s s s s s p s p p s p s g s g g s s YADKIN BASIN Total
Total Service Population 1992 2010 7,100 10,200 21,000 27,000 3,200 3,857 1,455 1,430 11,184 12,602 9,584 13,965 2,780 3,740 755 844 2,181 2,903 700 834 1,669 1,979 29,500 51,150 2,358 2,771 23,770 30,213 3,313 3,864 23,400 25,938 2,366 2,583 1,206 1,558 2,090 2,297 6,000 7,949 17,500 21,173 1,394 1,581 4,117 9,000 7,156 17,480 1,181 1,350 2,868 3,250 16,500 24,620 28,659 34,195 2,829 3,419 1,455 2,535 6,357 8,571 3,600 4,160 405 435 5,351 6,474 2,200 2,346 865 940 1,650 1,996 4,000 4,507 1,311,123 1,832,360
Total Water Use in mgd 1992 2010 0.66 1.43 4.66 11.50 0.98 1.30 0.14 0.15 1.30 1.49 3.20 5.08 0.31 0.36 0.09 0.47 0.18 0.20 0.06 0.07 0.17 0.32 8.13 13.30 0.61 0.87 7.53 9.61 0.46 0.70 7.11 7.88 0.44 0.88 0.37 0.47 0.27 0.44 0.82 2.34 1.27 1.59 0.66 0.73 1.20 2.23 4.14 7.90 1.10 1.96 0.28 0.32 7.96 8.09 3.46 9.50 0.26 0.32 0.31 0.52 1.00 1.50 2.36 3.63 0.00 0.03 3.40 5.25 0.17 0.17 0.06 0.06 0.23 0.28 0.82 1.07 236 369
mgd - million gallons per day
Reported Supply in mgd 1992 2010 1 2.2 19.5 19.5 2.5 3.5 0.144 0.144 2.9 2.9 11.25 11.25 0.613 11.113 0.176 0.756 1 1 0.115 0.255 0.5 0.5 34 34 1.03 1.23 88.48 88.48 1 1 14.75 14.75 2 2 1 1 0.265 0.265 1.25 1.25 285 285 2.1 2.1 5.8 5.8 15.3 15.3 2.5 2.5 1 1 13.1 13.1 4.5 14.5 0.4 0.76 0.4 0.4 0.556 2.556 20.1 20.1 0 0 14.84 14.84 0.521 0.521 0.1584 0.1584 0.463 0.463 1.67 1.67 1,742 1,990
Demand as % of Supply 1992 2010 66% 65% 24% 59% 39% 37% 100% 106% 45% 51% 28% 45% 51% 3% 52% 62% 18% 20% 52% 27% 34% 64% 24% 39% 60% 70% 9% 11% 46% 70% 48% 53% 22% 44% 37% 47% 100% 166% 66% 187% 0% 1% 31% 35% 21% 38% 27% 52% 44% 78% 28% 32% 61% 62% 77% 66% 64% 42% 78% 129% 180% 59% 12% 18% 0% 0% 23% 35% 33% 33% 36% 39% 50% 61% 49% 64%
YADKIN-PEE DEE
BASIN DESCRIPTION The Yadkin-Pee Dee Basin is the northern portion of a large river system that drains central North Carolina and northeastern South Carolina. The basin is divided into four sub-basins. The headwaters of the Yadkin River drain the eastern slope of the Blue Ridge Mountains, northeast of Blowing Rock. In the upper part of the basin the Yadkin flows generally northeasterly for about 100 miles before turning south. It continues flowing southeasterly and merges with the Uwharrie River east of Albemarle, NC, to form the Pee Dee River. The Rocky River flows into the mainstem below Lake Tillery. The Pee Dee continues flowing southeastward through South Carolina, where it is known as the Great Pee Dee River, and flows into the Atlantic Ocean near Georgetown, SC. There are series of impoundments on the river in North Carolina, beginning with W. Kerr Scott Lake west of Wilkesboro. The mainstem is impounded for about 50 miles by a chain of lakes consisting of High Rock Lake, Tuckertown Reservoir, Badin Lake, and Lake Tillery. The South Yadkin River drains 909 square miles north and west of Salisbury. It flows into the Yadkin above High Rock Lake. The Uwharrie River drains 374 square miles west of Asheboro. The Uwharrie joins the Yadkin below Badin Lake and the river flows into Lake Tillery as the Pee Dee River. The Rocky River drains 1440 square miles south of Kannapolis between Charlotte and Albemarle. It flows into the Pee Dee where Richmond and Stanly counties meet. Below Lake Tillery there is one more major impoundment, Blewett Falls Lake, before the Pee Dee flows into South Carolina. WATER USE Factors Affecting Water Demand This basin is home to about 17% of the State’s residents and contains all or part of 86 municipalities in 23 counties. Three of the state’s 12 major metropolitan areas depend on this basin for water supply. From 1990 to 1997 year-round population in 13 counties in this basin grew by 10% or more. One county, Union, grew by 26% over that period. This basin supplies water to the rapidly growing Piedmont Crescent, a corridor of urban development roughly following I40 and I85 from Raleigh to Charlotte. Total Water Use in Basin The USGS’s 1995 summary of water use estimated total water use in the basin at 306 million gallons per day (mgd), with almost 80% coming from surface water sources. USGS estimated total basin population at 1,251,240. Residential water demand was estimated at 76 mgd with about 70% of this demand being supplied by public water systems. Overall, public water systems supplied 146 mgd from surface water and 6 mgd from ground water for both residential and non-residential uses. The remaining residential water demand was met by 22 mgd of self-supplied ground water. In addition, there was about 130 mgd of self-supplied water withdrawn for non-residential water uses.
Local Water Supply Plans (LWSPs) All units of local government that supply or plan to supply water to the public are required to develop a LWSP. The Division of Water Resources (DWR) reviews LWSPs and maintains a database of the LWSP information. The current database reflects water use information for 1992. LWSPs were submitted by 74 public water systems having service area in this basin or using water from this basin. These systems supplied 236 mgd of water to 1,311,123 persons. DWR estimated that 764,721of the 1,311,123 persons served by these 74 LWSP systems receive water from the Yadkin Basin. Of the 236 mgd supplied by these 74 LWSP systems, 152 mgd comes from water sources in the Yadkin Basin, with the remainder coming from adjoining basins. The following table summarizes the LWSP population served with water from this basin and their water use for 1992. 1992 LWSP System Water Use from Basin (mgd) LWSP Population
Residential Use
Non-residential Use
Total Use*
Yadkin River
560,246
34.11
54.44
111.7
So. Yadkin
55,924
4.51
3.14
9.6
Uwharrie R.
21,064
1.12
2.94
4.7
Rocky River
127,487
7.76
12.82
25.9
Total
764,721
47.50
73.3
151.9
Sub-basin
*Total Use also includes unaccounted-for water and sales to other systems.
Residential use accounted for 31% of total water use in these systems while non-residential use accounted for 48% and unaccounted-for water use represented 8%. The Yadkin Basin supplies water to some of the State’s fastest growing areas. LWSP systems expect to supply water to 2,112,020 million persons by the year 2020, a 61% increase over 1992 levels. Their demand is projected to increase 89%, from 236 mgd to 445 mgd, by 2020. In the 1992 LWSPs, 13 of the 67 systems using water from this basin reported that available supply was not adequate to meet estimated demand through 2002. DWR encourages systems to begin planning to manage and meet future water demands before average daily water use reaches 80% of a system’s available supply. Data for 1992 indicated that 12 of the 74 LWSP systems in this basin had an average demand above this threshold. By 2020, 23 systems project demand levels that will exceed 80% of their available supply.
Self-supplied Use The USGS estimated that self-supplied users, excluding power generating facilities, accounted for 152 mgd of the 306 mgd total of water used from this basin, as shown in the table below. Industrial use accounted for 46% of the self-supplied uses, followed by livestock (21%), irrigation (17%), domestic (15%), and commercial (1%) uses. USGS Estimated Self-supplied Water Use in mgd Sub-basin
Domestic
Livestock
Industrial
Commercial
Irrigation
Yadkin River
13.00
20.94
So. Yadkin
0.06
3.47
Total
39.36
0.67
19.31
93.3
5.49
0.08
2.77
11.9
Uwharrie R.
**
**
**
**
**
**
Rocky River
9.34
7.29
25.88
0.23
4.43
47.2
Basin Total
22.4
31.7
70.7
1.0
26.5
152.3
** included in Yadkin River figures
Registered Water Withdrawals Before 1999, anyone withdrawing 1.0 mgd or more of surface or ground water was required to registered that withdrawal with DWR. In this basin there are 44 registered withdrawals other than LWSP systems or power generating facilities, with the cumulative capacity to withdraw 67 mgd. All of these registered withdrawals are for surface water. In 1999, the registration threshold for all water uses except agriculture was lowered to 100,000 gallons per day. March 1, 2000 is the deadline for registering 1999 withdrawals. WATER AVAILABILITY Surface water is the primary source of water for most of the residents of the basin. LWSPs indicate that 32 water systems in these sub-basins withdraw about 144 mgd of surface water. Seventeen of these systems rely on reservoirs for all or part of their water supply. The combined demand on these reservoirs averaged about 71 mgd in 1992. The estimated available supply from these reservoirs, based on the 20-year safe yield reported in local water supply plans, is 181 mgd. Nineteen of the surface water systems submitting local water supply plans have run-of-river intakes. These intakes supplied about 72 mgd of water in 1992. The available supply from these intakes, based on information reported in local water supply plans, is about 1411 mgd. The abundant surface water supplies in this basin are due in part to the storage and releases from the impoundments along the Yadkin River. For instance, Winston-Salem has 10,800 million gallons of storage in Kerr Scott Reservoir for use as water supply. There is also a small amount of ground water usage by several LWSP systems. Local water supply plans indicate that there are 7 systems with a 12-hour ground water supply of 1.4 mgd in these sub-basins.
INTERBASIN TRANSFERS OF SURFACE WATER Across the state many water systems move surface water between sub-basins to meet their needs. The table below indicates the number of potential interbasin transfers associated with this basin. Potential Interbasin Transfers based on 1992 data Sub-basin
Number
mgd OUT
mgd IN
Yadkin River
34
13.119
4.279
So. Yadkin
13
1.337
0
Uwharrie R.
6
4.626
0
Rocky River
15
2.595
18.96
The Yadkin basin is one of the most affected basins in terms of the number of transfer and the amount of surface water transferred. Over 13 mgd of water was transferred out of the Yadkin sub-basin, and nearly 20 mgd of water was transferred into the Rocky River sub-basin in 1992. As water use and transfer amounts increase, some water systems in the basin will eventually need to obtain interbasin transfer certifications. The 1997 LWSPs will better document these transfers. SUMMARY OF INFORMATION FROM 1992LWSPs !Per capita water use in gallons per day: Sub-basin
1992
2010
Yadkin River
213
235
So. Yadkin
212
209
Uwharrie R.
114
141
Rocky River
165
196
!17systems are not connected to another water supply system !28 systems rely on purchase water as their sole supply. !Many plans are not compatible due to discrepancies with interconnection data. !These systems used 144 mgd of surface water and about only 8 mgd of ground water. !The reported raw water supply was 1555 mgd of surface water and a 12-hour groundwater supply of 1.4 mgd. !There 9 county-wide systems. !18 systems were planning new supplies in the 1992 LWSPs. !The systems are projecting significant growth, 61% in population and 89% in demand, by 2020. !About 12 mgd of additional water supply will be needed by water systems to ensure that water demands in 2010 do not exceed 80% of available supply (about 4 mgd in the Rocky River sub-basin and about 8 mgd Yadkin sub-basin). !Demand-to-Supply Ratios for 1992 and 2010: 1992 2010 # of systems reporting 74 74 # of systems reporting ratio > 1 5 11 # of systems reporting ratio > 0.8 12 13 # of systems reporting ratio > 0.5 30 35 January 2000 Draft State Water Supply Plan DENR, Division of Water Resources
VIRGINIA Sparta ALLEGHANY COUNTY
Lansing
Eden
Mount Airy Stoneville
ASHE Jefferson COUNTY
Dobson
Pilot Mountain
Mayodan
Danbury
West Jefferson
11-1 New River
STOKES COUNTY
SURRY COUNTY
18-1 Yadkin River
COUNTY
WILKES COUNTY
Boone
East Bend
Mulberry-Fairplains
Jonesville
Wilkesboro North Wilkesboro
Blowing Rock
14-1 Roanoke River
Rural Hall
Boonville YADKIN COUNTY
2-1 Haw River Winston-Salem
GUILFORD COUNTY Greensboro
Kernersville
Yadkinville
FORSYTH COUNTY
CALDWELL COUNTY
Jamestown
Caldwell Co SE Caldwell Co N
Caldwell Co W Lenoir
Love Valley Sugar Loaf WD ALEXANDER Taylorsville COUNTY Alexander Co WC
3-1 Catawba River
High Point DAVIE COUNTY Davie Co. W.S.
Mocksville IREDELL COUNTY
Alexander Co Hwy 16-S
Joyceton Water Works Hudson
Bethlehem Water District Sawmills Granite Falls
Baton WC
Caldwell Co S Rhodhiss Valdese Morganton Drexel Icard Township WC Long View Brookford Burke Co. Hickory
3-2 South Fork Catawba River
5
10
20
Thomasville
Randleman Franklinville
Cleveland
RANDOLPH Asheboro 18-3 COUNTY Uwharrie River
Spencer
Conover Catawba
Troutman
Newton CATAWBA COUNTY
18-2 South Yadkin River
Salisbury East Spencer Denton Granite Quarry
Mooresville
Maiden
Faith
Basin 18 Yadkin (Upper) 15
Archdale Deep
Statesville West Iredell Water Corp Claremont
Landis
0
2-2 River
Davidson Water Inc DAVIDSON COUNTY
Lexington
China Grove
Miles
ROCKINGHAM Rockingham Co Waterworks COUNTY
Walnut Cove
King
Elkin
atauga River WATAUGA
Madison
(unshaded basins)
ROWAN COUNTY Rockwell
Handy SD
LEGEND County Boundary
Basin Boundary
Sawmills Granite Falls Caldwell Co S
Rhodhiss
Randleman
Lexington Statesville
ard Township WC
Franklinville
Cleveland
West Iredell Water Corp Claremont
Catawba
Troutman
Newton
Hickory
CATAWBA COUNTY
18-2 South Yadkin River
Denton Granite Quarry
Mooresville
ROWAN COUNTY Rockwell
Faith
3-2 South Fork Catawba River
China Grove Landis
Lincoln Co.
Lincolnton
Siler City
Salisbury East Spencer
Maiden
LINCOLN COUNTY
Ramseur
Asheboro 18-3 Uwharrie River
Spencer
Conover
Long View Brookford
Kannapolis
CABARRUS COUNTY
Chatham Co SW
RANDOLPH COUNTY
Handy SD
2-2 Deep River
Pfeiffer-North Stanly
Robbins Star
Concord Cherryville
High Shoals
Bessemer City
Kings Mountain
Dallas Ranlo
Mount Holly Charlotte- Mecklenburg Lowell Gastonia McAdenville Belmont 3-1 Cramerton
Cabarrus Co. WSD Harrisburg
Troy Albemarle
Biscoe
Carthage MOORE COUNTY
Montgomery County Water System
Stanly Co
Candor MOWASA-Seven Lakes Oakboro
Mount Gilead MONTGOMERY Norwood COUNTY
Taylortown MOWASA-Pinehurst Foxfire Village Southern Pines Aberdeen
Catawba River
GASTON COUNTY
Grover
Mount Pleasant STANLY COUNTY
Stanley
18-4 Rocky River MECKLENBURG COUNTY
Union Co Water System
18-1 Yadkin River
Ansonville
9-1 Lumber RiverPinebluff Ellerbee
Monroe
Marshville Peachland Wingate
RICHMOND COUNTY
Polkton Wadesboro Anson Co WS Lilesville
UNION COUNTY
ANSON COUNTY
Rockingham SCOTLAND
Hamlet
9-2 COUNTY Big Shoe Heel Creek
Morven
McFarlan Gibson
Basin 18 Yadkin (Lower)
Miles 0
5
10
15
20
(unshaded basins)
Laurinburg
LEGEND County Boundary
Basin Boundary
YADKIN BASIN 1992 and 2010 Population and Water Usage as reported by LWSP systems located in or using water from this basin Water systems showing "Demand as % of Supply" above 80% should be actively planning to control and meet future demand. Water Sources: g - ground water, s - surface water, p - purchased water
18 County ALEXANDER
ANSON
CABARRUS
CALDWELL DAVIDSON
DAVIE FORSYTH
GUILFORD IREDELL
MECKLENBURG MONTGOMERY
YADKIN BASIN Water System ALEXANDER CO HWY 16 S WD ALEXANDER CO WC SUGARLOAF WD TAYLORSVILLE ANSON CO ANSONVILLE LILESVILLE MORVEN PEACHLAND WADESBORO CABARRUS CO WSD CONCORD HARRISBURG MOUNT PLEASANT CALDWELL CO N CALDWELL CO SE DAVIDSON DENTON HANDY SD LEXINGTON THOMASVILLE DAVIE CO MOCKSVILLE KERNERSVILLE RURAL HALL WINSTON-SALEM HIGH POINT MOORESVILLE STATESVILLE TROUTMAN WEST IREDELL CHARLOTTE-MECKLENBURG BISCOE CANDOR MONTGOMERY CO TROY
Water Source* p s p p s p gp p p sp p s p g p p s s p s s s s p g s s s s gp p s p p s p
Total Service Population 1992 2010 2,271 2,784 5,895 10,353 969 1,093 2,103 2,255 9,652 12,000 1,644 1,744 800 900 731 618 600 630 5,612 4,752 9,517 10,065 47,500 72,500 2,200 5,000 1,200 2,300 60 63 1,890 2,003 83,747 128,747 1,369 1,542 7,350 11,000 19,000 22,500 23,000 26,000 14,110 22,300 3,450 3,930 12,276 29,608 1,800 1,850 216,000 276,000 70,258 80,113 11,600 24,660 25,958 27,348 1,400 2,822 2,800 4,500 450,777 673,018 1,583 1,658 739 832 4,121 4,900 3,443 4,263
Total Water Use in mgd 1992 2010 0.08 0.12 1.34 1.72 0.03 0.04 0.41 0.46 4.93 7.80 0.09 0.09 0.05 0.06 0.06 0.05 0.04 0.05 1.42 1.63 0.96 1.17 6.43 9.82 0.24 0.54 0.25 0.53 0.01 0.01 0.38 0.39 7.69 11.55 0.94 1.06 0.44 0.59 3.55 4.21 2.65 3.50 1.67 2.21 0.70 1.20 1.49 3.60 0.20 0.21 42.70 55.70 11.29 16.95 1.91 3.61 5.28 6.90 0.22 0.41 0.25 0.40 68.15 122.95 0.34 0.44 0.13 0.14 2.59 4.57 0.59 0.76
mgd - million gallons per day
Reported Supply in mgd 1992 2010 0.25 0.25 3.1 3.1 0.034 0.034 0.333 1.333 -2.3 -2.3 2 2 0.116 0.166 2 2 2 2 2.5 2.5 1.261 1.261 38.5 50.5 0.239 0.239 0.072 0.072 0.011 0.011 0.378 0.378 225.5 225.5 464.666 464.666 0.334 1 13.9 13.9 12.51 15.51 89.869 89.869 3.806 3.806 1.91 1.91 0.2015 0.2015 152.99 164.99 23.5 33.5 6 6 9.5 24.5 1.2556 1.2556 1.4 1.4 128.741 296.741 1 1 0.5 0.5 1.5 1.5 1 1
Demand as % of Supply 1992 2010 31% 49% 43% 55% 100% 112% 124% 35% -214% -339% 5% 5% 42% 33% 3% 3% 2% 2% 57% 65% 76% 93% 17% 19% 100% 227% 353% 735% 100% 100% 100% 102% 3% 5% 0% 0% 130% 59% 26% 30% 21% 23% 2% 2% 18% 32% 78% 188% 99% 102% 28% 34% 48% 51% 32% 60% 56% 28% 17% 32% 18% 28% 53% 41% 34% 44% 25% 27% 173% 305% 59% 76%
Water Sources: g - ground water, s - surface water, p - purchased water
18 County RANDOLPH
RICHMOND
ROWAN
STANLY
STOKES SURRY
UNION
WATAUGA WILKES
YADKIN
YADKIN BASIN (cont.) Water System ARCHDALE ASHEBORO RANDLEMAN ELLERBE HAMLET ROCKINGHAM CHINA GROVE CLEVELAND EAST SPENCER FAITH GRANITE QUARRY KANNAPOLIS LANDIS SALISBURY SPENCER ALBEMARLE NORWOOD OAKBORO PFEIFFER-NORTH STANLY WA STANLY CO KING DOBSON ELKIN MOUNT AIRY PILOT MOUNTAIN MARSHVILLE MONROE UNION CO WINGATE BLOWING ROCK MULBERRY-FAIRPLAINS WA NORTH WILKESBORO RONDA WILKESBORO BOONVILLE EAST BEND JONESVILLE YADKINVILLE
Water Source* p s sp p s sp gp g p g p s s s p s s p p p s s s s s p s p p s p s g s g g s s YADKIN BASIN Total
Total Service Population 1992 2010 7,100 10,200 21,000 27,000 3,200 3,857 1,455 1,430 11,184 12,602 9,584 13,965 2,780 3,740 755 844 2,181 2,903 700 834 1,669 1,979 29,500 51,150 2,358 2,771 23,770 30,213 3,313 3,864 23,400 25,938 2,366 2,583 1,206 1,558 2,090 2,297 6,000 7,949 17,500 21,173 1,394 1,581 4,117 9,000 7,156 17,480 1,181 1,350 2,868 3,250 16,500 24,620 28,659 34,195 2,829 3,419 1,455 2,535 6,357 8,571 3,600 4,160 405 435 5,351 6,474 2,200 2,346 865 940 1,650 1,996 4,000 4,507 1,311,123 1,832,360
Total Water Use in mgd 1992 2010 0.66 1.43 4.66 11.50 0.98 1.30 0.14 0.15 1.30 1.49 3.20 5.08 0.31 0.36 0.09 0.47 0.18 0.20 0.06 0.07 0.17 0.32 8.13 13.30 0.61 0.87 7.53 9.61 0.46 0.70 7.11 7.88 0.44 0.88 0.37 0.47 0.27 0.44 0.82 2.34 1.27 1.59 0.66 0.73 1.20 2.23 4.14 7.90 1.10 1.96 0.28 0.32 7.96 8.09 3.46 9.50 0.26 0.32 0.31 0.52 1.00 1.50 2.36 3.63 0.00 0.03 3.40 5.25 0.17 0.17 0.06 0.06 0.23 0.28 0.82 1.07 236 369
mgd - million gallons per day
Reported Supply in mgd 1992 2010 1 2.2 19.5 19.5 2.5 3.5 0.144 0.144 2.9 2.9 11.25 11.25 0.613 11.113 0.176 0.756 1 1 0.115 0.255 0.5 0.5 34 34 1.03 1.23 88.48 88.48 1 1 14.75 14.75 2 2 1 1 0.265 0.265 1.25 1.25 285 285 2.1 2.1 5.8 5.8 15.3 15.3 2.5 2.5 1 1 13.1 13.1 4.5 14.5 0.4 0.76 0.4 0.4 0.556 2.556 20.1 20.1 0 0 14.84 14.84 0.521 0.521 0.1584 0.1584 0.463 0.463 1.67 1.67 1,742 1,990
Demand as % of Supply 1992 2010 66% 65% 24% 59% 39% 37% 100% 106% 45% 51% 28% 45% 51% 3% 52% 62% 18% 20% 52% 27% 34% 64% 24% 39% 60% 70% 9% 11% 46% 70% 48% 53% 22% 44% 37% 47% 100% 166% 66% 187% 0% 1% 31% 35% 21% 38% 27% 52% 44% 78% 28% 32% 61% 62% 77% 66% 64% 42% 78% 129% 180% 59% 12% 18% 0% 0% 23% 35% 33% 33% 36% 39% 50% 61% 49% 64%
