Secondary and Cumulative Impacts Master Management Plan - 2014

'HYHORSPHQW &RQVWUDLQWV Understanding Morrisville’s development constraints prior to beginning the planning process can avoid unnecessary negative impacts on the environment and capital- ize on the assets of the community. Water Features Lake Crabtree, a major man-made lake, is located just east of Morrisville (Figure 2.4). A County Park on the north side of the lake provides boating and recreation access VHH SKRWR DW ULJKW &UDEWUHH &UHHN ÁRZV HDVW LQWR /DNH &UDEWUHH FURVVLQJ WKURXJK the southern portion of Morrisville. Topography in Morrisville gently slopes down to Crabtree Creek, with few steep slopes. The tributary streams of Indian Creek and 6DZPLOO &UHHN IHHG &UDEWUHH IURP WKH QRUWK IRUPLQJ EURDG ÁRRGSODLQV DQG ZHWODQGV along the eastern and southern portions of the Town. Wake County has preserved PXFK RI WKH ZHWODQG DQG ÁRRGSODLQ ODQG QRUWKZHVW DQG VRXWKZHVW RI /DNH &UDEWUHH as part of a wetland mitigation project, restricting it from any future development. Two smaller lakes, one near the Airport Boulevard interchange at I-40 and one adja- cent to the Preston Golf Course, are also owned by Wake County. &UDEWUHH &UHHN KDV EHHQ LGHQWLÀHG E\ WKH 1RUWK &DUROLQD 'HSDUWPHQW RI 1DWXUDO 5H- sources (NCDENR) as a 303(d) impaired stream, which means that the water quality does not meet Environmental Protection Agency (EPA) water quality standards. As a re- VXOW 1&'(15 KDV FUHDWHG D VSHFLÀF PDQDJHPHQW SODQ IRU WKLV VWUHDP LQ RUGHU WR LPSURYH the water quality. This management plan may affect how much and where development can occur near Crabtree Creek. Airport Noise Overlay Raleigh-Durham International Airport (RDU) is located adjacent to Morrisville’s eastern ERXQGDU\ RQ WKH RSSRVLWH VLGH RI ,QWHUVWDWH 6HYHUDO RI WKH DLUSRUW·V ÁLJKW SDWWHUQV FURVV over Morrisville, creating substantial noise. To avoid negative impacts, RDU has been work- ing with neighboring jurisdictions for years to restrict sensitive land uses in noise impacted areas. These restrictions are in acknowledgement of the fact that excessive noise has been shown to cause hearing and other physical problems over a long period of expo- sure. In addition to protecting its citizens, Morrisville’s implementation of the Airport Noise Overlay District protects it from legal liability for allowing substantial negative impacts to occur. Generally speaking, residences, schools and other sensitive uses like daycares, should not be located in areas with greater than 65 decibels of airport noise (shown by yellow diagonal lines in Figure 2.4). For Morrisville, this area covers approximately 26% of WKH WRZQ PXFK RI ZKLFK UHPDLQV XQGHYHORSHG 1RQUHVLGHQWLDO XVHV VXFK DV RIÀFHV UHWDLO DQG LQGXVWULDO IDFLOLWLHV DUH DOORZHG LQ WKHVH DUHDV +RWHOV DUH SHUPLWWHG LI VRXQGSURRÀQJ is installed. The Town Council has recently changed the Town’s ordinance to permit resi- GHQWLDO XVHV ZLWKLQ WKH GHFLEHO DUHDV ZHVW RI 1& LI VRXQGSURRÀQJ LV LQVWDOOHG DQG WKH ULJKW WR RYHUÁLJKW LV JUDQWHG Railroad Corridor The railroad through the center of Morrisville, as described earlier, has been an integral part of the town’s history and success. The tracks currently separate the town into two KDOYHV ZLWK OLPLWHG FURVVLQJV UHVWULFWLQJ DXWRPRELOH SHGHVWULDQ DQG ELF\FOH WUDIÀF 7KH North Carolina Railroad Company owns the rail corridor and has taken the position that WKHUH FDQ EH QR H[SDQVLRQ RI DXWR WUDIÀF FURVVLQJ WKH UDLOURDG DW JUDGH ZLWKRXW DQ RYHU- pass), and that no sidewalks or greenways may cross at-grade. Thus, east-west connectiv- ity is limited in the town until funds can be secured to build additional overpasses. $UHDV RI +LVWRULFDO 6LJQLÀFDQFH 0RUULVYLOOH KDV WZR DUHDV RI KLVWRULFDO VLJQLÀFDQFH QHLWKHU RI ZKLFK KDV \HW EHHQ JLYHQ D formal designation, such as inclusion on the National Register of Historic Places. The Shiloh area near the north end of town is a historically black community dating from the 1820s, with a church and other historical buildings. The Shiloh Heritage Preservation Area was es- tablished by the town through the adoption of the North Morrisville-Shiloh Small Area Plan on January 6, 2003. In addition, there are numerous historic buildings in the Town Center area, the preservation of which have been addressed in more detail in the Town Center Plan, adopted in 2007. Superfund Site Just south of the Shiloh area, on the northwest corner of McCrimmon Parkway and NC 54 is the former Koppers Co., Inc. plant. The plant, which dates to 1896, processed and treat- ed wood products, releasing contaminants into the soil, groundwater and surface water. Contamination at the site was discovered by the EPA in 1980, and cleanup was performed from 1990 to 1997. Cleanup involved removal of contaminated soil; bioremediation, car- ERQ DGVRUSWLRQ DQG ÀOWUDWLRQ WR WUHDW ZDWHU RQVLWH DQG UHYHJHWDWLRQ 7KH SURSHUW\ LV EHLQJ actively monitored by EPA before it can be formally removed from the Superfund list, but there is currently no environmental hazard at the site. The site is currently owned by two companies, with part of the site actively operating as a wood laminating facility, while the other is vacant. Now that the site has been cleaned up, it represents an opportunity to ÀQG D PRUH DSSURSULDWH FRPPXQLW\ RULHQWHG XVH

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Development Restrictions Floodway : Undevelopable

100-year Floodplain : 1% chance of flooding in any given year. Development is acceptable if building is located at least 2 feet above base flood elevation (FEMA elevation certificate is required). NationalWetlands Inventory : Require permits from state agencies for any major development, such as subdivisions or commercial development. May require developers to mitigate wetland losses.

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1 Int roduc tio n 2 Ba ckgr ou nd 3 E xi st ing Cond itio ns 4 P olicy Di rec t ion 5 R eco m me nd a t io ns 6 C ommu ni ty A re a s 7 A ctio n It em s