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HomeMy WebLinkAboutHaws Run Mitigation Site (2) DIVISION OF PARKS AND RECREATION June 20, 1996 MEMORANDUM c'S, o TO: Dave Robinson, Planning and Environmental ?f?gls d- NC Department of Transportation o? s FROM: Linda Pearsall 1= NC Natural Heritage Program ms's SUBJECT: Report on Rare Plant Occurrences at Hai-is Run Mitigation Site, Onslow County Attached is a preliminary report on the results of the visit to the Hall's Run Mitigation Site. I do not know when Heritage staff will be returning to the site, but Richard LeBlond, our Southeast Inventory Specialist, is happy to join DOT staff or consultants for a visit to the site. You may contact Richard at 910-326-1440 (in Swansboro) or through this office. Heritage staff would like to receive a copy of any information you have on the site and we are interested in participating in development of a mitigation plan. I enjoyed talking with you this morning and look forward to working with you on other mitigation projects. I MOTES ON HA999 RUN MITIGATION SITE, ONSLOV COUNTY R.J. LeDlond - 6/18/96 This parcel, now owned by DOT. is located along the Onslow.%-'Pender Co. line west of the Hancock property and south of Sandy Run I -:'ieit.t.3 t l«. '1wamp on the Maple Hill and Maoda H111 SW Quads: site on June 13 and 17, and have found 8 rare plant species, including one Federal Endangered (Thalictru_m cooler-i) and 4 Federal Candidate species <Carex lutea, Plantauo sn-arsiflcra, Rhynchospora _decurren_s, R. th_ornei). Among these are 4 State Endangered species. Other rare species include Arnoglossum ovat.um, _Cladi_u_m _mariscoides, and Rhynchospora -.-lobularis var. pinetorum. The parcel is large, totaling 540 acres. More than 90% of it was clear-cut with serious ground disturbance, including surface regrading over large areas. I have tentatively determined that the clear-cutting took place between 1977/79- 1983. The site does not appear as cleared on the 1981 topos (based on 1977 photo with 1979 field check), but does show up as cleared on 1983 photographs used for the 1992 Onslow Co. soils atlas. So far, my exploration has been mostly limited to a 35-acre area at the southeast end of the site, south of the access road from the Hancock property. Soils are wettest in this area, and the surface does not appear to have been regraded, at least not entirely. The west and south sides of this area are forested with a mix of species, including Taxodiu_m ascendens, Liriodendron, Nyssa biflora and adventive (or failed plantings of) Pinus taeda. There is remnant Pine Savanna Very Wet Clay Variant within the west side forested area. I have so far seen 1-2 acres of savanna, but there may be more based on the aerial photo. The flora is fairly diverse in the cleared area south of the access road, with Carex lutea dominating a 30x30' patch, and Rhynchospora thornei a patch dominant to dominant for 20 (-100+?) acres. Thalictrum coole i, Plantago s?arsiflora, and Cladium mariscoides so far are restricted to two ditches at the site, which also contain C_arex_ lutea and Arnoglos_s_um (the latter also occurs in the savanna remnant). Rhynchospora lobularis var. piinetorum appears to be abundant in the cleared areas north and soutFi of the access road. R. decurrens was found on a raised (but wet) 'abandoned roadbed off the south end of the cleared area. The significance of the site is at least statewide and probably national. It contains the 11th currently known global population of Thalictrum c_oole i, the 6th globally known population of Carex tea, the 5th currently known population of P_lanta o sparsiflora lE-'lrth Carolina, one of few ?_.ur r ently known g o"aT p E' ula3 IO21s for the little-known Rhvnchospora decurrens, and the world's largest known population ofYRhynchospora thornei. Pine Savanna Very Wet Clay Variant is a very rare natural community type restricted to the Maple Hill and Old Dock areas of eastern North Carolina. It is a likely site for Allium sp. 1, and would be the 6th known global site for that species-- Hmre f'work is required to determine the full number and 1 extent of rare species here. It is important to determine whether rare species currently known only from two large ditches- -particularly Thalictrum cooleyi and Plantago snarsiflora--also occur in remnant savanna, or in recovering cleared areas. It is my understanding that DOT would like to flood the ditches, which may be desirable for natural community restoration, but may be disastrous for the ditch-confined rare species. Perhaps ditch flooding can be phased in with judicious habitat restoration. ?• it i \ ?- qy. I p/ ys• .e - ' _?-w_?k'•? II j 1 // -WA It II 11 ' 11 II 11 tc= ?? ,Spring 50 'Cem •? emp -? ?' ? S - _. - ?_?•y ? - ue ? . s - l?%t0 ... i ? - ems. _ 1100 1.5 11 eca.ws 1(vY\ II -. In ,n --- - Y II 4 r ....y. - -V? r -t' ...yo- -"s"' -,o- -4- - .,m..,: i,. - ""t' ' •• - y. - 1. ;rte "'r? y - •-r- •...- _ • _? - II - © Parcel 70$-(, 5-qo 2cre5? Ne'D&f T ?a-Hs lzuh M(+l gzfloLA 5,-&e O Paeced 70?-33).,5--3 9cres, Ne,+(oKs (,ak K FL%AaL clal 5d%"V LCCS LCsC???///1 W O O?? ?Y e z 5 O\? i # I i? % .? i % s (? vv? % 'a a It \ II 11 11 II ' O Car (vfca? Gl2c?iuwt vhZrts?ecdcs? 91`K 2to sh?rSi??or?t 21+?(kc(idSPcrz O 2?Y?tcL10$Ppra ?(a?ovlar?S V?.r. O CareX )Ufe2, 2k.(ucllosPara -F?or1 O ?}rtio?lossvw, ovafvw,, ?2l i c f r??., Sao (?Y i O P?Ke, S?vzKKy V?r7 We+ C-(aY ti ? ?rrtoc?lasSv?h OVZtur•. © R.?tYv1c(?oSPerz ?ec?v??reu5 11 ,11 II ?t1 ».0 _ _ ?'?-• .'.?? :?? I??? 'mow ? ?'... °l . u.. dl 0 -4- ?'? - +rw r+tt. .. Pzrcevl 70-1, SYO 2cre5? I: ?z,ooo R Compensatory Mitigation Plan for Haws Run Mitigation Site Prepared for: '? . North Carolina Department of Transportation k Planning and Environmental Branch Raleigh, North Carolina Prepared by: Land Management Group, Inc. Wilmington, North Carolina April 1997 Job # 96-351 • Y 4 L. r TABLE OF CONTENTS LIST OF FIGURES ..................................................... 3 LIST OF TABLES ..................................................... 4 1.0 INTRODUCTION ................................................ 5 1.1 Mitigation Site Description ................................... 5 1.2 Site History ............................................... 6 1.3 Plant Community Types ..................................... 6 1.4 Soils .................................................... 7 2.0 PRELIMINARY STUDIES ......................................... 7 2.1 Jurisdictional Wetlands ...................................... 7 2.2 Soil Sampling ............................................. 7 2.3 Vegetation Surveys ......................................... 8 2.4 Consultation With Resource Agencies .......................... 9 2.5 Cooley's Meadowrue Recovery Plan ........................... 9 3.0 MITIGATION PLAN .............................................. 9 3.1 Swamp Forest Mitigation ..................................... 9 3.1.1 Swamp Forest Restoration ............................. 10 3.1.1.1 Hydrological Restoration ......................... 10 3.1.1.2 Plant Community Restoration ..................... 11 3.1.2 Swamp Forest Enhancement ........................... 11 3.1.3 Swamp Forest Preservation ............................ 11 3.2 Savanna Mitigation .......................................... 12 3.2.1 Wet Savanna Restoration .............................. 12 3.2.1.1 Hydrological Restoration ........................ 12 3.2.1.2 Plant Community Restoration .................... 13 3.2.2 Wet Savanna Enhancement ............................ 13 3.2.3 Wet Savanna Preservation ............................. 13 3.2.4 Dry Savanna Enhancement ............................ 13 4.0 MITIGATION PLAN IMPLEMENTATION SCHEDULE ................... 14 5.0 MONITORING PLAN ............................................ 14 5.1 Swamp Forest Monitoring ........... . ...................... 14 5.1.1 Hydrological Monitoring ............................... 14 5.1.2 Plant Community Monitoring ............................ 14 5.2 Savanna Monitoring ....................................... 14 5.2.1 Hydrologic Monitoring ................................. 14 5.2.2 Plant Community Monitoring ............................ 15 6.0 AS-BUILT REPORT AND DRAWINGS .............................. 15 Y 7.0 CONTINGENCY ............................................... 15 8.0 DISPENSATION OF PROPERTY .................................. 15 9.0 LITERATURE CITED ............................................ 16 10.0 FIGURES, TABLES, AND APPENDICES ............................ 18 'r 3 LIST OF FIGURES Figure 1. Vicinity map of Haws Run Mitigation Site ........................ 19 Figure 2. Haws Run Mitigation Site .................................... 20 Figure 3. Historical pattern of ecosystems identified in interior portion of the site 21 Figure 4. 1966 NRCS aerial photo showing logging path ................... 22 Figure 5. NRCS soils map ........................................... 23 Figure 6. NWI map of site ........................................... 24 Figure 7. NCDSWC hydric soil delineation of the interior portion of the site ..... 25 Figure 8. Well location and wetland delineation of the interior portion of the site . 26 Figure 9. Observed distribution of Thalictrum cooleyi ...................... 27 Figure 10. Restoration areas of Sandy Run Swamp ........................ 28 Figure 11. Restoration, enhancement, and preservation areas of Shelter Creek Swamp Forest ............................... 29 Figure 12. Ditches to be filled in savanna mitigation area .................... 30 Figure 13. Savanna mitigation areas .................................... 31 Figure 14. Well locations, vegetation plots and planting areas of Restoration Areas 1-3 .................................... 32 Figure 15. Vegetation plot locations in Restoration Areas 4 and 5 ............. 33 Figure 16. Savanna well locations and vegetation plots ..................... 34 Figure 17. Location of Lanier Quarry Savanna ............................ 35 4 . Y 4 LIST OF TABLES 4 Table 1. Characteristics of soils of the Haws Run Mitigation Site ............ 36 Table 2. Summary of chemical and physical characteristics of soils from the Haws Run Mitigation Site . ...................... 37 Table 3. Information on samples taken from lime piles at Haws Run Mitigation Site .................................. 38 Table 4. Information on rare plants found at Haws Run Mitigation Site. ....... 39 Table 5. Description of mitigation areas at Haws Run Mitigation Site ......... 40 Table 6. Summary of Cooley's Meadowrue recovery plan . ................. 41 .V 5 1.0 INTRODUCTION 1.1 Mitigation Site Description The Haws Run mitigation site is located approximately 28 miles northeast of the city of Wilmington, North Carolina, and straddles the Pender-Onslow County line (Figure 1). The site is 595 acres in size, approximately rectangular in shape, and is geographically positioned between Sandy Run Swamp Creek to the north and Shelter Swamp Creek to the south (Figure 2). The site is located in the Lower Coastal Plain, an area of wide, level interstream divides separated by small streams. Topographic relief of the region is low, and elevations at the site range from about 40 ft above mean sea level (MSL) in the middle to about 25 ft near the creeks at the northern and southern ends. Because of the low topographic relief of the of the region, stream velocities are low and water seasonally floods into adjacent wooded areas. Sandy Run Creek originates in western Onslow County approximately five miles north of the Haws Run Mitigation Site. It flows southward, then turns westward, and forms the northern boundary of the site. The creek then flows southwestward until it drains into Holly Shelter Creek, which then flows into the Northeast Cape Fear River. The headwaters of Shelter Swamp Creek are in Great Sandy Run Pocosin, approximately six miles east of the Haws Run Mitigation Site. The creek flows westward, forming the southern boundary of the site, and ends at its confluence with Sandy Run Creek, approximately two miles west of the site. The north and south portions of the site consist of approximately 200 acres of swamp forest associated with the two creeks. The average width of Sandy Run Swamp is approximately 1,600 feet and that of Shelter Swamp is 1,700 feet. Two earthen causeways and associated canals extend into both swamp forests at each end of the site, terminating at the respective creeks (Figure 2). Also, an approximately 2,300 foot- long logging access road extends through the Sandy Run Swamp connecting the property with NC Highway 50. Approximately 390 acres of the site was cleared and sub-soiled between the early 1960's and 1983 for silvicultural harvest and creation of pasture land. That area currently supports a dense stand of herbaceous vegetation (mostly grasses, sedges, and rushes) and scattered patches of broadleaf trees and shrubs. Aerial photographs dating back to 1949 indicate that the interior portion of the site historically consisted of approximately 138 acres of wet savanna, approximately 40 acres of dry savanna, approximately 169 acres of pine flatwoods, and approximately 44 acres of cleared swamp forest (Figure 3). 6 The Haws Run Mitigation Site was purchased in 1995 by the North Carolina Department of Transportation (NCDOT) to provide compensatory mitigation for unavoidable impacts to wetlands resulting from highway construction in the region. 1.2 Site History Silvicultural activities appear to have been initiated prior to 1966, based on NRCS aerial photographs (Figure 4). Logging concentrated on selective harvest of long leaf pine (Pinus palushis) from the interstream divide portion of the tract and much of the larger cypress (Taxodium distichum) from the swamp forests where large remnant stumps are still visible. During the early 1970's, an effort was undertaken to convert the interior (mostly non-swamp forest) portions of the site into pasture land with the intent of raising American Bison. Site preparation included removal of all remaining trees and excavation of an extensive ditch and canal system with canals and causeways extending through the swamp forests to both creeks. The canal system was also used to make the potential pasture area more symmetrical. The wet nature of the property made drainage difficult; approximately one foot of water reportedly stood over 60% of the interior portion during the conversion effort. Once the canal system was complete, the entire interior portion was sub-soiled and approximately 900 tons of lime were applied to increase soil pH. Several remnant lime piles remain on the site. 1.3 Plant Community Types The swamp forests at each end of the site are classified as Coastal Plain Small Stream Swamp (Blackwater Subtype) (Schafale and Weakley, 1990). Dominant tree species are swamp tupelo (N.yssa biflora), bald cypress, pond cypress (Taxodium ascendens), sweet-gum (Liquidambar styraciflua), yellow poplar (Liriodendron tulipifera), red maple (Aces rubrum), willow oak (Quercus phellos), loblolly pine (Pinus taeda), and pond pine (P. serotina). One causeway at the north end of the site is continuous to NC 50, with the exception of an opening approximately 25 feet wide. The entire flow of water through the swamp is restricted to this narrow opening. At present, the cleared, interior area supports a diverse herbaceous community dominated by grasses, sedges, and rushes. Scattered patches of woody shrubs and small trees occur throughout, with most concentrated in the northern half of this area. The most common species.present are sweet-gum, black gum (Nyssa sylvatica var. biflora); wax myrtle (Myrica cerifera), sweetbay (Magnolia virginiana), ti-ti (Cyrilla racemiflora), and red maple. I 7 1.4 Soils The soils of the swamp forests are mapped as Muckalee. Soils of the interior portions include Woodington, Torhunta, Foreston, Stallings, and Grifton (USDA 1990, 1992). Muckalee soil is generally found along flood plains and is frequently flooded for brief periods. The other soils of the site are generally found on uplands, interstream divides, or near drainage ways. The distribution of the soils of the site is shown in Figure 5 and a summary of their pertinent characteristics is found in Table 1. 2.0 PRELIMINARY STUDIES 2.1 Jurisdictional Wetlands National Wetland Inventory (NWI) maps identified the majority of the interior portion of the site as upland (Figure 6), although the USDA mapping indicates the presence of hydric soils throughout the site (Figure 5 and Table 1). A soil survey conducted in 1994 concluded that 92% of the cleared portion of the site consisted of hydric soils (Figure 7) (DEHNR 1994). The majority of the non-hydric soils identified in that survey generally correspond to the distribution of the Foreston series mapped by the Soil Conservation Service (USDA 1990, 1992). The wetland areas mapped by NWI generally coincide with the swamp forests. These wetland types are mostly identified as PF01 C (Palustrine, Forested, Broadleaf Deciduous, Seasonally Flooded) (Cowardin et a/. 1979). Ten Remote Data System WL40 groundwater monitoring wells (WI-40s) were installed on the site prior to the 1995 growing season by Land Management Group, Inc. Six additional wells were installed in December 1995. The locations of these wells are shown in Figure 8. A wetland delineation map was developed (Figure 8) in consultation with the Regulatory Branch of the USACOE, Wilmington District, based on daily groundwater levels at these wells, and the mapping of hydric soils by DEHNR (1994) (Figure 7). One hundred and ten acres of the interior cleared portion of the tract were determined to be jurisdictional wetlands, based on this delineation. The majority of the wetlands occur in two irregularly shaped areas near the center of the tract. A drained area separates the two jurisdictional wetland areas. This drained area is approximately 200 feet wide and is centered on the large canal extending from the north end of the site to the south end. The length of that area is approximately 4,500 feet. One smaller area of jurisdictional wetlands was also identified near the southern end of the site. 2.2 Soil Sampling Soil sampling was conducted in June 1996. Samples were collected at eight 8 locations throughout the interior portion of the site. Sample locations generally correspond to the locations of the groundwater monitoring wells (Figure 8). At each location, three sub-samples were collected from an area of approximately 100 ftz, mixed, and a composite sample taken. One set of samples was collected from the surface to a depth of 6 inches. Another set of samples was collected from a depth of 12 to 18 inches. The samples were then analyzed by the Agronomic Division of the NC Department of Agriculture (NCDA). A copy of the results is attached and summarized in Table 2. The analyses indicated that the soils of the site are acidic to circumneutral, with an arithmetic mean pH of 5.1. Samples from suspected remnant lime piles were taken in January 1997. Analyses of the samples for calcium carbonates are shown in Table 3. Results of the analyses support previous statements that lime was applied to interior portion of the site in an effort to convert it to pasture land. 2.3 Vegetation Surveys On June 13 and June 18, 1996, personnel of the North Carolina Natural Heritage Program visited the Haws Run Mitigation Site in the process of conducting an inventory of rare plants and vegetative communities in Onslow County. During the surveys of the site, eight species of rare plants were found. These included Cooley's Meadowrue (Thalictrum cooleyt), a federally listed as Endangered species. Supplementary plant surveys were conducted throughout the remainder of the year. A total of seventeen rare species, including four C2 Federal Candidate species, were confirmed to occur on the site (Memorandum from Mr. Richard LeBlond, North Carolina Natural Heritage Program [NCNHP], attached). Summary information on the species found is given in Table 4. During the surveys, efforts to determine the distribution of Cooley's Meadowrue were conducted by NCDOT personnel in coordination with Mr. LeBlond. The distribution and estimated numbers of plants found is shown in Figure 9. In addition to the listed species, remnants of Pine Savanna Very Wet Clay Variant were identified at the southern end of the site between the cleared area and the swamp forest. Pine Savanna Very Wet Clay Variant is a very rare community type that Schafale (1994) has identified as one of five savanna types. The dominant tree canopy is composed of a mixture of pond pine, long leaf pine, and pond cypress. This variant occurs on clayey soils usually underlain by marl. Only five other examples of this ecosystem are known. The nearest example is the Lanier Quarry Savanna, approximately two miles.west of the Haws Run Mitigation Site. That site is partially owned by The Nature Conservancy; however, various inholdings result in a patchwork of ownership. . 9 2.4 Consultation With Resource Agencies Because of the occurrence of a federally listed as Endangered species (Cooley's Meadowrue) on the mitigation site, NCDOT contacted the US Fish and Wildlife Service (USFWS) to discuss the status of this occurrence and how it may affect the implementation of hydrologic and vegetative restoration of the site. Discussions between NCDOT and USFWS are ongoing to ensure that implementation of the mitigation plan will not adversely affect populations of Cooley's Meadowrue on the mitigation site. Comments from Mr. Richard LeBlond (NCNHP) and Dr. John Taggart, Coastal Reserve Coordinator of the North Carolina Division of Coastal Management, were also included in the development of the plan. 2.5 Cooley's Meadowrue Recovery Plan After implementation, the Haws Run Mitigation Site will be a valuable component in fulfilling many of the tasks that have been outlined in the Recovery Plan for the species (USFWS, 1994). The site will provide for the protection of a large, newly discovered population of the species. Also, the site will provide a location for research related to the reestablishment of the species in areas that have been disturbed. Specific tasks noted in the recovery plan that will be supported by the Haws Run Mitigation Site are given in Table 6. 3.0 MITIGATION PLAN A total of 415 acres of Haws Run Mitigation Site is proposed for wetland mitigation. This will consist of restoration, enhancement, and preservation of both wet savanna and swamp forest as shown in Table 5. An additional 113 acres of dry savanna will be enhanced. A total of 67 acres of the site will not be manipulated. 3.1 Swamp Forest Mitigation A total of 28 acres of swamp forest will be restored (Table 5). For descriptive purposes, swamp forest restoration will be divided into five areas. Restoration will consist of one area in the interior portion of the site that has been cleared and filled, and four areas within in the swamp forests where previously constructed causeways will be removed (Figures 10 and 11). In addition, the canals adjacent to the causeway at the north end of the site (Restoration Area 3) will be filled. These activities will lower the elevations of the causeways and raise the elevations of the canals to those of the adjacent swamp. Swamp and bottomland hardwood tree species will be planted in all five restoration areas. The swamp forest areas of Shelter Creek Swamp and Sandy Run Swamp 10 provide important hydrologic, biogeochemical and habitat functions for the Cape Fear River watershed. The areas provide water storage, both at the surface and subsurface levels. This aids in decreasing extreme flood energy by attenuating a portion of flood flow volume. As low order riverine streams, the swamp forests are effective in removing non-point source pollution, nutrient cycling, and maintenance of characteristic vegetative conditions. The swamp forests also provide habitat for a variety of invertebrate and invertebrate species. 3.1.1 Swamp Forest Restoration 3.1.1.1 Hydrological Restoration Restoration Area 1 (Figure 10) consists of the removal of one half acre of filled causeway extending into Shelter Creek Swamp. Approximately 1,200 cubic yards of fill material will be removed and placed into the central canal. This will lower the elevation of the causeway approximately 1.5 feet to the elevation of the adjoining swamp forest. Since microtopography has been shown to be important in tree establishment and distribution (Beatty 1984; Huenneke and Sharitz 1986), small hummocks will be left undisturbed or created to serve as microsites for seedling establishment. Restoration Area 2 (Figure 10) consists of approximately 22 acres which was cleared and filled during past conversion activities. Examination of existing ground elevations, soil profiles (by hand auger), and historical aerial photography indicate that this area was filled during the conversion of the interior portion of the site to pasture. Approximately 53,000 cubic yards of fill will be excavated from this area and used to fill the central canal. This will lower the elevation of the area approximately 1.5 feet and will result in the area being similar in elevation to that of the adjacent swamp forest. Restoration Area 3 (Figure 10) consists of approximately 4 acres of canal and causeways created to give site access during the previous conversion area. The causeway will be used to fill the adjacent canals. Restoration Area 4 (Figure 11) consists of approximately one half acre of causeway extending into Shelter Creek Swamp. The causeway fill material (approximately 1,210 cubic yards) will be removed and used as fill in the central canal. Small hummocks will be left for planting. Restoration Area 5 (Figure 11) consists of approximately one acre of an improved logging path created during past silvicultural activities. Approximately 2,420 cubic yards will be removed as with Areas 1 and 4. This will bring the area to a similar grade of the adjacent swamp forest. ?` 11 3.1.1.2 Plant Community Restoration As described in Restoration Area 1, small hummocks will be left or created for tree seedling establishment in all swamp forest restoration areas. Trees will be planted systematically on these hummocks on approximately eight foot centers. This will establish a planting density of 680 trees per acre. A total of nine species of wetland trees, in two mixtures, will be planted in Restoration Areas 1-5. Species included in the two mixtures are based upon on-site observations, Schafale and Weakley (1990), and regulatory agency guidelines (DOA, 1993). Mixture # 1 generally corresponds with the composition of Coastal Plain Small Stream Swamp (Blackwater Subtype). Species include swamp tupelo, bald cypress, pond cypress, laurel oak (Quercus laurifolia), overcup oak (Q. lyrata), and swamp chestnut oak(Q. michauxii). This mixture will be planted in the half of each restoration area nearest the creek; that is, those areas subject to a greater frequency of flooding. Mixture # 2 more closely corresponds with Coastal Plain Bottomland Hardwoods and includes swamp chestnut oak, laurel oak, overcup oak, pond cypress, yellow poplar, and cherrybark oak (Q. pagodaefolia). This mixture will be planted in the remaining portions of the restoration areas further from the creeks which are subject to less flooding. 3.1.2 Swamp Forest Enhancement Shelter Creek swamp forest enhancement will be created by the removal of the logging road (Restoration Area 5) which currently isolates 25 acres of Shelter Creek Swamp (Figure 11) from the creek. The removal of this road will restore the hydrologic connection between the enhancement area and adjacent swamp forest. The removal of the causeways, particularly the large causeway in Restoration Area 3 is expected to enhance Sandy Run Swamp both upstream and downstream of the site. These enhancement effects will be addressed through a functional assessment which will be conducted at a later time. If approved by appropriate agencies, this assessment will yield additional enhancement mitigation credits. However, no additional enhancement mitigation is proposed at this time. 3.1.3 Swamp Forest Preservation Approximately 171 acres of the remaining swamp forest will be preserved. These wetlands are divided approximately equally between Sandy Run and Shelter Creek Swamps. Appropriate deed restrictions will ensure that the area will be preserved in perpetuity. . I 12 3.2 Savanna Mitigation Based on the historical mosaic of pine-dominated ecosystems in the interior portions of the mitigation site, savanna will be the primary target ecosystem of all non- swamp forest areas. This mitigation plan proposes restoring 81 acres of wet savanna, enhancing 99 acres of wet savanna, and enhancing 113 acres of dry savanna (Figure 13 and Table 5). The term savanna has been used by many to describe grass-dominated communities that contain scattered trees. Originally covering millions of acres in the southeastern United States, this ecosystem has been reduced to a series of small and scattered islands within a highly managed and manipulated landscape by silvicultural practices, alternate land use, suppression of naturally occurring fires, and drainage activities. The remaining, unprotected savannas are few in number and small in area and are subject to further loss from growth and development in the region. A specific, agreed-upon definition for savanna has not been developed; however, for the purpose of this project, the definition used by Taggart (1994) in a study of southeastern savannas will be used. That definition is as follows: U. . . a naturally occurring, bi-layered (tree and herb), fire-maintained ecosystem of the southeastern United States coastal plain that exhibits greater that 50% cover by a herbaceous, graminoid-dominated undergrowth, shrub (woody plants less than 2 m in height) cover less than 10% and scattered pines (less than 50% canopy cover) as the overstory dominant". The functions and values of savannas are numerous. Noted for their beauty, they provide habitat for many species of rare flora and fauna. Among the most biologically diverse ecosystems in the world, savannas support more species per unit area than any ecosystem in temperate North America. They provide habitat diversity within the landscape and ecotones favorable to certain wildlife species. Savannas also are of special importance for education and research purposes due to high biological diversity. 3.2.1 Wet Savanna Restoration 3.2.1.1 Hydrological Restoration The canal through the central portion of the site will be filled from a point near the electric transmission line (approximately 1,800 feet north of the northern occurrence of Cooley's Meadowrue) to the northern end of the canal. The length of the proposed fill is approximately 4,600 feet. In addition, all smaller interior ditches and canals (total .. 13 length of approximately 5,500 feet) will be filled. Fill material will consist of soil originally excavated from the ditches which currently form berms adjacent to these ditches and material excavated from the swamp forest restoration areas. Ditches to be filled are shown in Figure 12. The eastern and western boundary canals will not be filled to prevent flooding adjacent properties which are not owned by NCDOT. These activities will restore wetland hydrology to approximately 81 acres (Figure 13) which are currently drained. 3.2.1.2 Plant Community Restoration Because the herbaceous and shrub layers of the savanna community are largely in place, planting activities will concentrate on the reestablishment of the canopy tree species. An equal mixture of pond pine, long leaf pine, and pond cypress will be planted at a total density of 40 trees per acre. Reestablishment of wet savanna grasses will be attempted. Species proposed for planting include wiregrass (Aristida stricta), Carolina dropseed (Sporobolus sp. 1), toothache grass (Ctenium aromaticum), and savanna muhly (Muhlenbergia expansa). Depending on availability, these species will be established in plots at scattered locations throughout the interior portion of the site and allowed to naturally repopulate suitable areas. 3.2.2 Wet Savanna Enhancement The goal of savanna enhancement will be the restoration of a typical plant community over 99 acres of remnant wet savanna area that has maintained jurisdictional wetland status (Figure 13). The planting. strategy will be identical to that of the wet savanna restoration area. 3.2.3 Wet Savanna Preservation Approximately eleven acres of wet savanna will be preserved (Figure 13). This area is a remnant pine savanna very wet clay variant described by LeBlond. Since Cooley's Meadowrue is found in this area, no manipulation is proposed for this area. 3.2.4 Dry Savanna Enhancement , Dry savanna plant community species will be reestablished over 113 acres in the remnant dry savanna areas of the site (Figure 13). Long leaf pine seedlings will be planted at a ratio of 40 seedlings per acre in these areas. Wiregrass will be established in plots at scattered locations throughout dry savanna areas of the site and allowed to naturally repopulate these areas. • 14 4.0 MITIGATION PLAN IMPLEMENTATION SCHEDULE Grading and shaping of the restoration areas and filling all ditches and canals will take place during the summer and fall of 1998. Planting will occur during the dormant season of 1998-1999. So 199 ? { o w ?? S e cts b-N 5.0 MONITORING PLAN 5.1 Swamp Forest Monitoring 5.1.1 Hydrological Monitoring Three groundwater monitoring wells will be established in Restoration Area 2 (Figure 14). Data will be collected by these wells on a daily basis during the growing season. No wells are proposed for installation in other swamp forest restoration areas because of their small size. These other areas will be assumed to meet hydrology criterion due to the high water tables of adjacent areas. In addition to the wells installed in Restoration Area 2, three groundwater monitoring wells will be installed in adjacent areas of Sandy Run Swamp. Data collected by these wells will provide a reference for determining the hydrologic success of Restoration Area 2. Success criteria for Restoration Area 2 will be the restoration of the water table similar to that of the reference wells. Groundwater levels will be monitored for five years or until success criteria are met. 5.1.2 Plant Community Monitoring One 50' x 50' vegetation plot will be established adjacently to each groundwater monitoring well In Restoration Area 2. One plot will be established in each of the other restoration areas (Figures 14 and 15). Sampling will be conducted annually. Success criteria will be the survival of 320 trees per acre at the end of the fifth growing season, including acceptable volunteer species. Non-acceptable volunteer species are red maple, sweet gum or any pine species. 5.2 Savanna Monitoring 5.2.1 Hydrologic Monitoring Six groundwater monitoring wells will be installed in the wet savanna restoration area as shown in Figure 16. Data will be collected from these wells on a daily basis. In • 15 addition, three groundwater monitoring wells will be installed in the Lanier Quarry Savanna, approximately two miles east of the Haws Run Mitigation Site (Figure 17). Data collected by these wells will provide a reference for determining the hydrologic success of wet savanna restoration. Success criteria for wet savanna restoration will be the establishment of the water table similar to that of the reference wells. Groundwater levels will be monitored until success criteria are met. 5.2.2 Plant Community Monitoring Due to the low density of planted species in the savanna area, large sample areas will be required. Three 500'x 500' (5.7 acres) sample plots will be established (Figure 16): one in the wet savanna restoration area, one in the wet savanna enhancement area, and one in the dry savanna enhancement area. Each plot will be sampled annually. To facilitate locating each tree within the low densities of these large plots, the position of each tree planted in the monitoring plots will be marked by either permanent stakes or Global Positioning System. Success criteria will be the survival of 20 trees per acre of the species planted at the end of the fifth growing season after planting. 6.0 AS-BUILT REPORT AND DRAWINGS As-built drawings, photographs, plans, and specifications will be provided to the appropriate regulatory agencies within 90 days after the Haws Run Mitigation Site is completed. Annual monitoring reports, including data, photographs, and locations of any identified problem areas, will be submitted by the end of January each year until the site is deemed successful. 7.0 CONTINGENCY Should vegetation success criteria not be met within the specified period, replanting and extended monitoring will be implemented. Should hydrological success not be achieved, consultation with appropriate resource agencies will be held to outline specific measures, including regrading, to be undertaken. 8.0 DISPENSATION OF PROPERTY NCDOT will maintain ownership of the property until all mitigation activities are completed and the site is determined to be successful. Although no plan for 16 dispensation of the Haws Run Mitigation Site has been developed, NCDOT will deed the property to a resource agency (public or private) acceptable to the appropriate regulatory agencies. Covenants and/or restrictions on the deed will be included that will ensure adequate management and protection of the site in perpetuity. 9.0 LITERATURE CITED Beatty, S.W. 1984. Influence of microtopography and canopy species on spatial patterns of forest and understory plants. Ecology: 65:1406-1519. Cowardin, L. M., V. Carter, F. C. Goblet, and Edward T. Laroe. 1979. Classification of Wetland and Deepwater Habitats of the United States. Fish and Wildlife Service, U. S. Department of Interior. DEHNR, 1994. Hydric Soils Investigation. Haw Run Tract, Onslow and Pender Counties. NC Department of Health, Environment, and Natural Resources. Division of Soil and Water Conservation, Technical Services Branch. Department of the Army (DOA). 1987. Corps of Engineers Wetland Delineation Manual. Tech. Rpt. Y-87-1, Waterways Experiment Station, COE, Vicksburg, Mississippi. Department of the Army (DOA). 1993 (Unpublished). Corps of Engineers - Wilmington District. Compensatory Hardwood Mitigation Guidelines (12/8/93) FHWA, 1991. Final Supplemental Environmental Impact Statement, Smith Creek Parkway and Downtown Spur, Wilmington, New Hanover County, North Carolina. State Project Number 8.2250102, U-92, Federal Project No. M-5851(2). Huenneke, L. F. and R. R. Sharitz. 1986. Microsite abundance and distribution of woody seedlings in a South Carolina cypress-tupelo swamp. The American Midland Naturalist 115:328-335. Schafale, Michael P. 1994. Inventory of Longleaf Pine Natural Communities in North Carolina. North Carolina Natural Heritage Program, Division of Parks and Recreation. NC Department of Environment, Health, and Natural Resources. Schafale, Michael P., and Alan S. Weakley. 1990. Classification of the Natural Communities of North Carolina, Third Approximation. North Carolina Natural Heritage Program, Division of Parks and Recreation. NC Department of Environment, Health, and Natural Resources. 17 Taggart, John B. 1994. Ordination as an Aid in Determining Priorities for Plant Community Protection. Biological Conservation: 8(1994):135-141. U. S. Department of Agriculture (USDA). 1990. Soil Survey of Pender County, North Carolina, USDA Soil Conservation Service. U. S. Department of Agriculture (USDA). 1992. Soil Survey of Onslow County, North Carolina, USDA Soil Conservation Service. U. S. Fish and Wildlife Service (USFWS). 1994. Cooley's Meadowrue Recovery Plan. U. S. Fish and Wildlife Service. Atlanta, GA. 29 pp. 18 10.0 FIGURES, TABLES, AND APPENDICES A Haves Run Mitigation Site 1 2.5 miles Figure 1. Vicinity neap of LAND MANAGEMENT NC DOT [haws Run Mitigation Site. GROUP, INC Haws Run Mitigaje April, 1997 Fender/Onslow 20 Figure 2. Haws Rain Mitigation Site. LAND MANAGEMENT GR®UP9 INC April, 1997 880 1 720 3"0 Scales 1" a 1720' NCD®T Haws Rua Mitigation Site Pander/Onslow Counties, N 21 1Ay lF LEGEND r Swamp forest (-44 acres) Wet savanna (-738 acres) Dry savanna (-40 acres) Pine fiatwoods (-159 acres) Figure 3. Historical patterns of ecosystems identified in tl interior portion of the site. LAND MANAGEMENT GROUP, INC April, 1997 "I Jne e Transmission SCALE i" = 1300' NCDO i Haws Run Mitigation Site Fender/Onslow Counties, NC 22 h to site boundary SCALE 1" = -1300' Figure 4. 1966 NRCS aerial photo showing logging path. LAND MANAGEMENT GROUP, INC NCDOT Haws Run Mitigation Site Pender/Onslow Counties, N April, 1997 23 S SCALE 1 " = 2000' Figure 5. NRCS soil map. LAND MANAGEMENT NCDOT GROUP INC Haws Run Mitigation Site April, 1997 Pender/Onslow Counties, NC 24 U t °L .?ti . SCALE 1" = 2000' Figure 6. NWI map of site. L LAND MANAGEMENT GROUP, INC April, 1997 NCDOT Haws Run Mitigation Site Pender/Onslow Counties, NC 25 t ?• t4 ? ,;?? Vim, e - . { SAN Non-hydric soil SCALE 1" = 1500' Figure 7. NCDSWC hydric LAND MANAGEMENT NCDOT soil delineation of the interior GROUP INC Haws Run Mitigation Site portion of the site. ' Pender/Onslow Counties, NC April, 1997 e ? .r4 ? 23 /h ?i LEGEND Uplands (282 acres) 404 wetlands (110 acres) Letters indicate well locations x = wells installed at 50` and 250@ intervals from ditches Delineation is based on two years well c historical photography.. and soil mappin IP&L ransmission Line 600 SCALE 1" = 1300' Figure 8. Well location and wetland delineation of interior portion of tract. LAND MANAGEMENT GROUP, INC April, 1997 NC DOT Flaws Run Mitigation Site PenderfOnslow Counties, NC 27 Dots indicate plants Numbers indicate # of plants present Figure 9. Observed distribution of Thaiictrum cooleyi. LAND MANAGEMENT GROUP, INC April, 1997 860 9720 3440 Scale: 1" = 1720° NCDOT Flaws Run Mitigation Site order/Onslow Counties, NC 28 i LO - I LLI - - _ eEs cis O 0 I- ?' C3 ? aQ E?L' L M 0 = CL H z LU 2 u 0 - <13: a) L ® <t W ^E W O Y C O O L O (D L O_ t O e- O O LI. ?CU0 ?0U)E O +w cu cu LL i c6 f!3 3Q 'F i "h1 iI ?r I CP&L Transmission Line 4000 LEGEND Dticheslcanals to be let open 650 1300 2600 -- Ditches.=canals to be filled SCALE I" = 1300' Figure 12. Ditches to be filled in the savanna mitigation area. LAND MANAGEMENT GROUP, INC April, 1997 NCDOT Haws Run Mitigation Site Pender/Onslow Counties, NC 31 F o' it CP&L Transmission Line LEGEND wet Savanna Restoration (31 acres) wet Savanna Enhancement (99 acres) Preservation (11 acres) ® Dry Savanna Enhancement (113 acres) Swamp Forest Restoration (22 acres) ® Non impacted areas (67 acres) Figure 13. Savanna mitigation areas. 650 '300 2600 SCALE 1" = 1300' NCDOT Haws Run Mitigation Site Pender/Onslow Counties, NC LAND ©MANAGEMENT G, INC April, 1997 32 T t p ? ? LEGEND = Monitoring wells X I =Vegetation plots Figure 14. Well locations, vegetation plots, and planting mixtures for Restoration Areas 1-3. LAND MANAGEMENT GROUP, INC April, 1997 SCALE 1'= 500' NCDOT Haws Run Mitigation Site Pender/Onslow Counties, NC c? I - k r - - 7 7 ` - .. 0 {E LU u V7 O CL key (D N as 2 ? M? cp L1J u sm T z m <0 "L z N !6 d _ L Q. O t6 L l? o T Q? L J.+ 3 ?ma a8 U e6 34 if ?L • CP&L Transmission Line LEGEND Restoration sample plot Enhancement sample plot Upland enhancement sample plot Swamp Forest Area Well location Figure 16. Savanna well locations and vegetation plots. 650 1300 2600 SCALE 1" = 1300' NCDOT Haws Run Mitigation Site Pender/Onslow Counties, NC LAND MANAGEMENT GROUP, INC April, 1997 35 1'l=~2.5miles Figure i?. Location of LAND MANAGEMENT NC DOT Lanier Quarry Savanna. GROUP, INC Haws Run Mitigation Site April, 1997 PencleriOnslow Counties 36 Table 1. Characteristics of soils of the Haws Run Mitigation Site. Soil Series Drainage Location Hydric (Y/N) Community Type Foreston Moderately Interstream N Various well divides Pine/HW Grifton Poor Shallow Y Various depressions Pine/HW Muckalee Poor Flood Plains Y Swamp Forest Stallings Somewhat Interstream Inclusions Various poor divides Pine/HW Torhunta Very poor Interstream Y Various divides Pine/HW Woodington Poor Interstream Y Various divides Pine/HW 37 Table 2. Summary of chemical and physical characteristics of soils from Haws Run Mitigation Site. Location Wetland (Y/N) Depth Class HM (%) WN CEC BS (%) pH A N 0-6" Mineral 1.55 1.20 3.4 59 5.4 A N 12-18" Mineral 1.31 1.12 2.5 40 5.0 B Y 0-6" Mineral 1.94 0.91 10.6 92 6.2 B Y 12-18" Mineral 1.25 1.13 6.4 97 6.4 D Y 0-6" Organic 5.53 0.82 6.1 31 4.4 D Y 12-18" Organic 5.85 0.92 5.0 22 4.3 E N 0-6" Min/Org 4.69 0.97 8.3 70 5.4 E N 12-18" Min/Org 4.69 1.14 4.9 43 5.0 F N 0-6" Mineral 2.76 1.07 7.2 82 5.8 F N 12-18" Mineral 1.67 1.22 5.2 92 6.4 H Y 0-6" Organic 10.00 0.88 6.3 14 4.3 H Y 12-18" Organic 7.96 0.71 17.1 78 5.3 J Y 0-6" Mineral 1.31 1.03 5.2 54 4.7 J Y 12-18" Mineral 0.92 1.23 3.0 60 5.2 K N 0-6" Min/Org 4.95 0.78 6.8 21 4.2 K N 12-18" Organic 7.96 0.79 7.7 13 4.1 Notes: Wetland (Y/N) - Denotes whether sample was collected in an area designated as wetland Depth = Depth from which sample was collected Class = Soil type HM (%) = Humic matter content WN = Weight per volume (g/cc), Soil density CEC = Cation exchange capacity BS (%) = Percent base saturation pH = Acidity co M am C O ca m c O Q.' 3 cu (III cn a? .Q O E E O L v- C O Y cu cn a> CL E w co c O c O co E L C M O cu m 0U U 0 lK a) co M M M M 'D N U c Q L W ? 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C C L C'l 00 1; C, q y N b? h- N N cq N ° tV ° 00 co . t _ ^ M ;;, '.` v n •. `T to F-' ?G a s N ~° w N d o N ti°o .,, N BOO 6¢ N to ti en tl-l w° N N O N O^ N v p N c is o o o 09 ;; 3 :? to ^1 H, N o N o to O C> z ,,, C h o „? ^? '' O n •C p to ^C O cc ~C p c°, M , . C\ O tT t1 Ci Y C • t j•` °?o :c oe o o o, o ev i c? .°? M y m oe o ., N V °0 U U V v C O C .?•. G .. "~ti ? : ? ? , , „?? M ? i•r C .. "~r M O :-. G .. "r ? ? t, '+. N • c o o U o c ° 4' ?r o o ° ?' C o o at ?r ' O o Iz, v -. o v "IV 61 N U CU C V N N C O v N • LNi V N O V N 'S. V N N Z N (Y. U N F? o i .I? y ""? \ ? tV o-•7 ? ? ? ? ? ? ? ? ? ? O ? ? o O c y cG 0 ^ :b cq N 00 194 O V a p L I y : y C y r ? <? C C C C '? "+ h C C tz to) V) TU ".. 4t ? C-. V Z ?'• ? C ? V V '-C. ? ? GG ?. V t-. ?. C ? .y ?. t? 4;.??. ? ,y Z N y O y +. .,c ^ ?. x-. N O C O O C ?+ CO 41 C7 F GL F w &- -1 k. to O C N O F. h w ? E. h O Z p o • ?T i V X; ' ON y i L - ? •47 v N N .;. ; r,77 ? O . v C'i N U z - y ., y G tC ? ... 'O 3. ? (O C: E O O ? V v V L V •rN N V w 1tQ .. 4 Q V C O 4 •E L O U _ z v C o V h N _ C; 00 ? • ?' N o N ? K• N N ? p o + h ^C :? O h r z O N ? ° 4 C v? i? N N 4, cs ? "O ^ L C C g? .O L G C ? C O O U .? ? O TJ V E IOR a ? p N ,? V L ? C.? 00 V ;p 00 C h C r ~ ? E .+.. L p y ti Z 00 d N V ?• ?. ? N ? C.; N • o .n o ~ M N ? o N :i: rr c 'G O\ o ! .O ,+ N y N o? C ?- v O° y C ? O b 3. C C C a? E O p O Q' ?' Cr V = N .Z •ec EE\, V ? (.d1 y C C i- O ? L O h O ti c a: 1 G ? ?S •.Y ?! ? oo N M p o O N h "~C c'i O • U o0 y C 'r N .-. CC C C M .. C E o ` o u Q V Ntr .d M r7 Ly ^ .d L U N VW ?.j 'f M O y V1 W .? ^ y t L ? C ?a. a ? n vl F= .•. h O c: N ? ? b " o N ? vs "? {L M • N - O ? ti 'C N C OR C . n0 v V ? h C ? O "~ti ? d O G `V V N d ° E\ d O V M ~ [ C G y 'C ?' CSf wy.. it v c, Ey h w c' o c .r N M S c? v N M ? N N M N ti ti "~C ti M 'G oe O a. ° C ? ti G\ 'r N V ? -C? N o N .1.. O O G\ h hVV ..C E- ? a: :..r; L? Cry .? T. : M M t 00 • n. h ? .fV ti .: i cq w4 M r-. .: y ? h YI O to O N CJ `n U ;?. Jz cq C t O C4 ? E L ? O o o ? V? .? 4, V CJ N n ., 00 w v A ;:CZ ?C v ? Cco v , .z C N O PRELIMINARY REPORT FOR HAWS RUN MITIGATION SITE, ONSLOW COUNTY 10/3/96 R.J. LEBLOND, BIOLOGIST, NATURAL HERITAGE PROGRAM NATURAL RESOURCE SECTION, DIVISION OF PARKS AND RECREATION N.C. DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES INTRODUCTION Haws Run Mitigation Site is located in western Onslow County along the boundary with Pender County southeast of Maple Hill. The site is comprised of two parcels totaling 593 acres, and it is owned by the N.C. Department of Transportation (NC DOT). NC DOT acquired the site "to provide compensatory mitigation to offset unavoidable impacts to wetlands as a result of [roadway] construction" (NC DOT 1996). The site is located on an interstream terrace and is bounded on the north by Sandy Run Swamp and on the south by Shelter Swamp Creek. About 400 acres of the site were clear-cut and apparently grubbed in the early 1980's, and the canopy still has not recovered. Herb vegetation indicates that the cleared area once supported the very . rare Pine Savanna Very Wet Clay community variant (Schafale 1994). Remnants of Pine Savanna habitat persist at the site, and several rare plant species associated with the Very Wet Clay variant occur at the site, including a few globally rare endemics restricted to this variant. Thalictrum cooleyi (Cooley's meadowrue), federally listed as Endangered, is among the globally rare endemics. Many problems are posed by the protection of rare species populations, restoration of natural community habitat and processes, and restoration of the site's natural hydrologic and edaphic conditions. But the site also presents an excellent opportunity to study the dynamics of the Pine Savanna Very Wet Clay community variant, to learn the survival requirements of the globally rare endemic plant species, to develop successful restoration techniques, and to ultimately protect a site that, in spite of the degradation, is nationally significant. PHYSICAL DESCRIPTION Haws Run Mitigation Site lies along the Onslow/Pender county line approximately four miles southeast of Maple Hill and 10 miles northwest of Holly Ridge. According to the U.S.G.S. Maple Hill and Maple Hill SW topographic quads, the site is bisected from northwest to southeast by the county line. However, the Onslow County Assessor's property map shows the boundary as coinciding with the west side of the NC DOT property; thus, all of the site is located within Onslow County, at least for tax purposes. The county line in this area is described as an "indefinite. boundary" on the U.S.G.S. topographic quads. W The NC DOT property is composed of two parcels: 708-1 (540.20 acres) and 707-33 (53.08 acres). As of June 17, 1996, the Onslow County Tax Office computer records showed parcel 708-1 as owned by NC DOT, but parcel 707-33 as- owned by Nationsbank Financial Services. NC DOT claims ownership of both parcels (Schiller 1996). Parcel 707-33 is located at the extreme northwest end of the site, along the south side of Sandy Run Swamp. The site is located on a low terrace about 2 miles broad between Sandy Run Swamp to the north and Shelter Swamp Creek to the south. Both creeks drain into Holly Shelter Creek, a tributary of Northeast Cape Fear River. The topography is essentially flat, with the highest elevation (about 43 feet) near the middle, and grading downslope to about 27 feet elevation in the stream floodplains to the northwest and southeast. Some portions of the site within or adjacent to the stream floodplains are wooded, and total about 200 acres, most of which are located at the southeast end adjacent to Shelter Swamp Creek. Floodplain forest supports the Coastal Plain Small Stream Swamp (Blackwater Subtype) community (NC DOT 1996). Wooded areas between the Shelter Swamp Creek floodplain and the cleared area to the northwest support pine plantation and remnant Pine Savanna Very Wet Clay Variant habitat. The cleared area totals about 400 acres and is dominated by herbs associated with the Pine Savanna variant, and with shrubs and low trees occurring in scattered patches. Several soils have been documented at the site. The cleared area is dominated by Stallings, Foreston, Woodington, and Torhunta soils. Muckalee is the dominant floodplain soil, and Grifton occurs in a wooded area between the Shelter Swamp Creek floodplain and the cleared area. According to soil sampling conducted in June 1996, "soils of the site are acidic to circumneutral, with an arithmetic mean pH of 5.1" (NC DOT 1996). Although the 1996 NC DOT report (i i ) states that the soils "are reasonably normal and have not been significantly altered," sample soil probes made during the June 25 site visit indicated a uniform light gray fine silt or clayey soil to a depth of three or more feet without characteristic layering, lacking a dark surface layer, and with buried undecomposed vegetation. These sample probes were made in the southeast portion of the site, and may not be characteristic of the entire site. But they suggest that at least in the southeastern portion of the cleared area, the soil was turned over to a considerable depth subsequent to clearing. All of the Pine Savanna Very Wet Clay Variant habitat and most of the rare plant species populations identified to date are located in the southeastern portion of the site. The most significant area is bounded along the northwest by the access road from the adjacent Hancock property; along the northeast by the parcel boundary ditch; along the southeast by an abandoned roadbed parallel to and about 1200 feet southeast of the access road from the Hancock property; and along the southwest by a flooded canal that centrally bisects the site from northwest to southeast. 2 MITIGATION In its July 1996 report, NC DOT recommends the following mitigation projects at the site: (1) filling of the central NW/SE canal in the cleared interior of the site; (2) causeway removal, ditch filling, and swamp forest re-establishment in the creek floodplains; (3) Pine Savanna Very Wet Clay Variant canopy and dominant ground-cover grass re- establishment in the cleared interior; and (4) hydrologic and vegetation monitoring. Filling of the central canal. Towards the goal of hydrologic restoration, NC DOT proposes to fill this canal southward from its northern terminus to a point "200 feet north of the northern occurrence of Cooley's Meadowrue," a distance of about 5,200 feet. In addition, another 7,400 feet of axillary ditches in this area are also proposed for filling. It has been proposed (Schiller 1996) that original spoil paralleling the ditches and canal be used for the fill. Prevention of runoff and erosion associated with these ditches and the canal is highly desirable. However, due to erosion, the amount of spoil paralleling the proposed fill areas has decreased, and fill will have to be transferred from elsewhere on-site or imported from off-site. To avoid undesirable impacts from these options, consideration should be given to damming rather than filling the canal and ditches, or to a combination of filling and damming. Creek floodplain causeway removal, ditch filling, and swamp forest re-establishment. Towards the goals of hydrologic and vegetation restoration, NC DOT proposes to remove to original elevation about 8,200 linear feet of causeways in the Sandy Run Swamp and Shelter Swamp Creek floodplains, and to fill to original elevation about 5,400 linear feet of canals parallel to the causeways. These areas will then be planted with swamp hardwood and cypress trees, with a species composition that "will approximate those of nearby areas." "Trees will be established at a density of 680 trees/acre (8'x8' spacing)." Pine Savanna canopy and dominant grasses re-establishment. Towards the goal of plant community restoration, NC DOT proposes to plant pond pine, longleaf pine, and pond cypress trees throughout most of the interior area with a density and pattern based on the proposed reference system, Lanier Quarry Savanna. Re-establishment of wiregrass (Ari i ri ) and Carolina dropseed (S orb sp. 1) will also be attempted at scattered locations. The goal is highly desirable, but it is recommended that canopy and dominant grass re- establishment first be conducted on study plots to determine which soil types and/or hydrologic conditions are most favorable for active restoration efforts. It is also recommended that fire A management be introduced into the area of remnant Pine Savanna Very Wet Clay Variant in the southeastern portion of the property; woody vegetation is naturally recovering in the remnant habitat in this area. Hydrologic and vegetation monitoring. NC DOT proposes to establish wells to monitor hydrologic restoration, and to establish vegetation sampling plots to monitor plant community restoration. NC DOT is seeking to establish reference system plots at Lanier Quarry Savanna "to determine the species composition and densities of canopy trees to be planted in the interior areas of the mitigation site." However, if such data already exist, they can be used in place of the plots. Sampling plots will be established in both the cleared interior and in swamp forest "to monitor the success of tree planting." It is recommended that wiregrass and Carolina dropseed densities also be studied in the mitigation site plots, and in the Lanier Quarry Savanna plots if such data are not already available. SIGNIFICANCE OF RARE PLANT POPULATIONS M As of September 19, 1996, the following rare plant taxa have been documented as occurring at the Haws Run Mitigation Site: STATUS TAX ON NC Ag=alini as hhylla C Allium sp. I C Arnoglossum va m SR arex lutea PC2 PE la i m mariscoides SR Plantago snarsiflora C2 E Rhynchospora r vi e C R. ec rr n C2 C R. divergens SR R. glo lari var. pinetorum SR R. thornei C2 PE cl rig georgiana SR S. verticillata C lidag lchra C2 E Thalictrum coolevi E E Xyrisf flabelliformis 1 X O e;0t- ;S \1 ?10?-i-- C C Csf? ?i5?0?;c9?1 (11C2" taxa are currently treated as "Species of Concern" by the U.S. Fish and Wil dlife Service.) 4 • The site contains the 12th currently known global population of US Endangered Thalictrum coolevi, the 6th globally known populations of arex lutea and Allium sp. 1, one of few currently known global populations of the little-known Rh, ny chospora decurrens, and the world's largest known population of Rhynchospora thornei. In addition, the Pine Savanna Very Wet Clay Variant is a very rare natural community type restricted to the Maple Hill and Old Dock areas of eastern North Carolina. Based on these critical populations for globally rare plant species, and the presence of a remnant of a very rare natural community type, the site has been determined to be nationally significant by N.C. Natural Heritage Program. REFERENCES CITED NC DOT. 1996. Preliminary compensatory mitigation plan for Haws Run Mitigation Site. Permits and Wetland Mitigation Unit, Planning and Environmental Branch, NC DOT, Raleigh. Schafale, M.P. 1994. Inventory of longleaf pine natural communities in North Carolina. N.C. Natural Heritage Program, DPR, DEHNR, Raleigh. Schiller, D. 1996. NC DOT biologist. Personal communications of June 25 and July 10 with R.J. LeBlond, N.C. Natural Heritage Program, DPR, DEHNR, Raleigh. it \ ??? t'r Ili k71. k?sril / NORTH CAROLINA NATURAL HERITAGE PROGRAM N.C. Department of Environment, - Health, and Natural Resources, Division of Parks and Recreatior4 P.O. Box 27687 Raleigh, North Carolina 27611 919 / 733-7701 Here's the Information You Requested nn In response io'your r t c`?t, we forward the enclosed information and hope it will serve your . purpose. If we may be of further service, please call upon us. ? 0 1 I Compensatory Mitigation Plan for Haws Run Mitigation Site Prepared for: ? North Carolina Department of Transportation Planning and Environmental Branch Raleigh, North Carolina 1 ? Prepared by: Land Management Group, Inc. Wilmington, North Carolina February 24, 1997 Job # 96-351 I 1 1 1 1 1 TABLE OF CONTENTS LIST OF FIGURES .................................................... 4 LIST OF TABLES ..................................................... 5 1.0 INTRODUCTION ................................................ 6 1.1 Mitigation Site Description ................................... 6 1.2 Site History ............................................... 6 1.3 Plant Community Types ..................................... 7 1.4 Soils .................................................... 7 2.0 PRELIMINARY STUDIES ......................................... 7 2.1 Jurisdictional Wetlands ...................................... 7 2.2 Soil Sampling ............................................. 8 2.3 Vegetation Surveys ......................................... 8 2.4 Consultation With Resource Agencies .......................... 9 3.0 MITIGATION PLAN .............................................. 9 3.1 Swamp Forest Mitigation ..................................... 9 3. 1.1 Swamp Forest Restoration ............................. 10 3.1.2 Swamp Forest Enhancement ........................... 11 3.1.3 Swamp Forest Preservation ............................ 11 3.2 Savanna Mitigation .......................................... 11 3.2.1 Savanna Restoration ................................. 12 3.2.1.1 Hydrological Restoration .................... 12 3.2.1.2 Plant Community Restoration ................ 12 3.2.2 Savanna Enhancement ............................... 13 3.2.3 Savanna Preservation ................................ 13 3.2.4 Upland Enhancement ................................. 13 4.0 MITIGATION PLAN IMPLEMENTATION SCHEDULE ................... 13 5.0 MONITORING PLAN ............................................ 13 5.1 Swamp Forest Monitoring ................................... 13 5.1.1 Hydrological Monitoring ............................... 13 5.1.2 Plant Community Monitoring ........................... 14 5.2 Savanna Monitoring ....................................... 14 5.2.1. Hydrologic Monitoring ................................ 14 5.2.2. Plant Community Monitoring ........................... 14 6.0 AS-BUILT REPORT AND DRAWINGS .............................. 14 8.0 LITERATURE CITED ............................................ 15 / 9.0 FIGURES, TABLES, AND APPENDICES ............................ 17 1 1 1 p 1 D 4 1 1 1 1 1 1 C 1 0 LIST OF FIGURES Figure 1. Vicinity map ................................................ 18 Figure 2. Haws Run Mitigation Site ...................................... 19 Figure 3. Ecosystems identified in interior portion of tract .................... 20 Figure 4. 1966 NRCS aerial photo ...................................... 21 Figure 5. NRCS soils map ............................................. 22 Figure 6. NWlmap .................................................. 23 Figure 7. NCDSWC hydric soil delineation ................................ 24 Figure 8. Well location and wetland delineation ............................ 25 Figure 9. Observed distribution of Thalictrum cooleyi ........................ 26 Figure 10. Restoration areas of Sandy Run Swamp ......................... 27 Figure 11. Restoration, enhancement, and preservation areas of Shelter Creek Swamp .............................................. 28 Figure 12. Ditches to be filled in savanna mitigation area .................... 29 Figure 13. Savanna mitigation areas ..................................... 30 Figure 14. Well locations and sample plots in Restoration Areas 1-3 ............ 31 Figure 15. Well and sample plot locations in Restoration Areas 4-7 ............ 32 Figure 16. Savanna well locations and sample plots ........................ 33 5 LIST OF TABLES Table 1. Characteristics of soils ........................................ 34 Table 2. Summary of chemical and physical characteristics of soil .............. 35 Table 3. Information taken from lime piles ................................. 36 1 Table 4. Information on rare plants ...................................... 37 Table 5. Description of mitigation areas .................................. 38 1 1 1 1 1 1 0 6 1 1.0 INTRODUCTION 1.1 Mitigation Site Description The Haws Run mitigation site is located approximately 28 miles northeast of the 1 city of Wilmington, North Carolina, and straddles the Pender-Onslow County line (Figure 1). The site is 600 acres in size, approximately rectangular in shape, and is geographically positioned between Sandy Run Swamp Creek to the north and Shelter Swamp Creek to the south (Figure 2). The north and south portions of the site consist of approximately 200 acres of swamp forest associated with the two creeks. The 1 average width of Sandy Run Swamp is approximately 1,600 feet and that of Shelter Swamp is 1,700 feet. Two earthen causeways and associated canals extend into both swamp forests at each end of the site, terminating at the respective creeks (Figure 2). Also, an approximately 2,300 foot-long logging access road extends through the Sandy Run Swamp connecting the property with N.C. Highway 50. 1 Approximately 390 acres of the site was cleared and sub-soiled between the early 1960's and 1983 for silvicultural harvest and creation of pasture land. The area currently supports a dense stand of herbaceous vegetation (mostly grasses, sedges, and rushes) and scattered patches of broadleaf trees and shrubs. Historical aerial 1 photographs dating back to 1949 indicate that the interior portion of the site consisted of approximately 138 acres of wet savanna, approximately 40 acres of dry savanna, approximately 169 acres of pine flatwoods, and approximately 44 acres of cleared swamp forest (Figure 3). 1 1.2 Site History Silvicultural activities appear to have been initiated prior to 1966, based on NRCS aerial photographs (Figure 4). Logging concentrated on selective harvest of long leaf pine (Pinus palustris) from the interstream divide portion of the tract and much of the larger cypress (Taxodium distichum) from the swamp forests where large 1 remnant stumps are still visible. During the early 1970's, an effort was undertaken to convert the interior (interstream divide) portions of the site into pasture land with the intent of raising American Bison. Site preparation included excavation of an extensive ditch and canal 1 system with canals and causeways extending through the swamp forests to both creeks. The canal system was also used to make the potential pasture area more symmetrical. The wet nature of the property made drainage difficult; approximately one foot of water reportedly stood over 60% of the interior portion during the conversion effort. Once the canal system was complete, the entire interior portion was sub-soiled / and approximately 900 tons of lime were applied to increase soil pH. Several remnant lime piles remain on the site (Figure 2). 7 1.3 Plant Community Types The swamp forests at each end of the site are classified as Coastal Plain Small Stream Swamp (Blackwater Subtype) (Schafale and Weakley, 1990). Dominant tree species are water tupelo (Nyssa aquatica), bald cypress, pond cypress (Taxodium ascendens), sweet-gum (Liquidambar styraciflua), yellow poplar (Liriodendron tulipifera), red maple (Acer rubrum), willow oak (Quercus phellos), loblolly pine (Pinus taeda), and pond pine (P. serotina). One causeway at the north end of the site is continuous to NC 50, with the exception of an opening approximately 25 feet wide. The entire flow of water through the swamp is restricted to this narrow opening. At present, the interior area supports a diverse herbaceous community dominated by grasses, sedges, and rushes. Scattered patches of woody shrubs and small trees occur throughout, with most concentrated in the northern half of this area. The most common species are sweet-gum, black gum (Nyssa sylvatica var. biflora), wax myrtle (Myrica cerifera), sweetbay (Magnolia virginiana), ti-ti (Cyrilla racemiflora), and red maple. 1.4 Soils The soils of the swamp forests are mapped as Muckalee. Soils of the interior portions include Woodington, Torhunta, Foreston, Stallings, and Grifton (USDA 1990, 1992). Muckalee soil is generally found along flood plains and is frequently flooded for brief periods. The other soils of the site are generally found on uplands, interstream divides, or near drainage ways. The distribution of the soils of the site is shown in Figure 5 and a summary of their pertinent characteristics is found in Table 1. 2.0 PRELIMINARY STUDIES 2.1 Jurisdictional Wetlands National Wetland Inventory (NWI) maps identified the majority of the interior portion of the site as upland (Figure 6), although the USDA mapping indicates the presence of hydric soils throughout the site (Figure 5 and Table 1). A soil survey conducted in 1994 oncluded that 92% of the cleared portion of the site consisted of hydric soils (Figure ) (DEHNR 1994). The majority of the non-hydric soils identified in that survey general) correspond to the distribution of the Foreston series mapped by the Soil Conservati n Service (USDA 1990, 1992). The wetland areas mapped by NWI generally coincide ith the swamp forests. These wetland types are identified mostly as PF01C (Palustri e, Forested, Broadleaf Deciduous, Seasonally Flooded) (Cowardin et al. 1979). 8 Ten Remote Data System WL-40 groundwater monitoring wells (WL-40s) were installed on the site prior to the 1995 growing season by Land Management Group, Inc. Six additional wells were installed in December, 1995. The locations of these wells are shown in Figure 8. A wetland delineation map was developed (Figure 8) in consultation with the Regulatory Branch of the USACOE, Wilmington District, based on daily groundwater levels at these wells, and the mapping of hydric soils by DEHNR (1994) (Figure 7). One hundred and thirteen acres of the cleared portion of the tract were determined to be jurisdictional wetlands, based on this delineation. The majority of the wetlands occur in two irregularly shaped areas near the center of the tract. A drained area separates the two jurisdictionally wetland areas. This drained area is approximately 200 feet wide and is centered on the large canal extending from the north end of the site to the south end. The length of that area is approximately 4,500 feet. One smaller area of jurisdictional wetlands was also identified near the southern end of the site. 2.2 Soil Sampling Soil sampling was conducted in June, 1996. Samples were collected at eight locations throughout the interior portion of the site. Sample locations generally correspond to the locations of the groundwater monitoring wells (Figure 8). At each location, three sub-samples were collected from an area of approximately 100 ftz, mixed, and a composite sample was taken. One set of samples was collected from the surface to a depth of 6 inches. Another set of samples was collected from a depth of 12 to 18 inches. The samples were returned to the Agronomic Division of the NC Department of Agriculture (NCDA) for analysis. A copy of the results is attached and a summary of the results is given in Table 2. The analyses indicated that the soils of the site are acidic to circumneutral, with a arithmetic mean pH of 5.1. Samples from suspected remnant lime piles were taken in January 1997. Analyses of the samples for calcium carbonate are shown in Table 3. Results of the analyses support previous statements that lime was applied to interior portion of the site in an effort to convert it to pasture land. 2.3 Vegetation Surveys During 1996, personnel of the North Carolina Natural Heritage Program visited the site in the process of conducting an inventory of rare plants and vegetative communities in Onslow County. During the survey of the Haws Run Mitigation Site, seventeen species of rare plants were found. These included Cooley's Meadowrue (Thalictrum cooleyt), a federally listed endangered species. Other species found include four Federal Candidate species and four rare species (Memorandum from Mr. Richard LeBlond, attached). A summary of the species found on the site is given in Table 4. 9 During June, 1996, surveys to determine the distribution of Cooley's Meadowrue at the site were conducted by NCDOT personnel. Results of that survey are shown in Figure 9. In addition to the listed species, remnants of Pine Savanna Very Wet Clay Variant were identified in a wooded area at the southern end of the site between the cleared area and the swamp forest. Pine Savanna Very Wet Clay Variant is a very rare community type that Schafale (1994) has identified as one of five savanna types. The dominant tree canopy is composed of a mixture of pond pine, long leaf pine, and pond cypress. This variant occurs on clayey soils usually underlain by marl. Only five other examples of this community type are known. The nearest example is the Lanier Quarry Savanna, approximately two miles west of the Haws Run Mitigation Site. That site is partially owned by The Nature Conservancy; various inholdings result in a patchwork of ownership. 2.4 Consultation With Resource Agencies Because of the occurrence of a federally listed endangered species (Cooley's Meadowrue) on the mitigation site, NCDOT contacted the US Fish and Wildlife Service to discuss the status of this occurrence and how it may affect the implementation of hydrologic and vegetative restoration of the site. Discussions will continue to ensure that implementation of the mitigation will not adversely affect Cooley's Meadowrue on the mitigation site. The restoration of areas adjacent to Shelter Creek Swamp is complicated by the nearby presence of Cooley's Meadowrue in the central canal and adjacent cleared area. During discussions between NCDOT and appropriate resource agency personnel, concerns were raised that the filling of the large central canal downstream of the plants may possibly drown them. In order to protect the Cooley's Meadowrue in the central canal, a culvert will be installed from the central canal to the eastern canal (Figure 9). This will insure existing drainage of the central canal area containing Cooley's Meadowrue and will allow for mitigation efforts to proceed. 3.0 MITIGATION PLAN A total of 528 acres of Haws Run Mitigation Site will be used for wetland mitigation. This will consist of restoration, enhancement, and preservation of both savanna and swamp forest as shown in Table 5. An additional 40 acres will be used as -upland enhancement. A total of 67 acres will not be manipulated. 3.1 Swamp Forest Mitigation 10 3. 1.1 Swamp Forest Restoration A total of 40 acres of swamp forest will be restored (Tables 5). For descriptive purposes, swamp forest restoration will be divided into seven areas. Restoration will consist of two areas that have been cleared and filled, and five areas where causeways and canals will be removed. Canals will be filled using the material originally used to create the causeways. This will also bring the causeways to the level of the adjacent swamp. The swamp forest which has been cleared and filled will be regraded and shaped to the level of the adjacent remaining swamp forest. Swamp hardwood plant species will be established in all restoration areas. Restoration Area 1 (Figure 10) consists of the removal of one half acre of filled causeway extending into Shelter Creek Swamp. A total of 2178 cubic yards of fill material will be removed and placed into the central canal. This removal will restore the elevation of the causeway to a level grade with the adjoining swamp forest. Since microtopography has been shown to be important in tree establishment and distribution (Beatty 1984; Huenneke and Sharitz 1986), small hummocks will left undisturbed to create microsites for seedling establishment. Six species of swamp hardwood trees will be planted on eight foot centers for a total of 680 trees per acre. An equal number of water tupelo, bald cypress, pond cypress, willow oak, water oak (Quercus nigra), yellow poplar and green ash (Fraxinus pennsylvatica) seedlings will be planted. Seedlings will be planted on the hummocks for greater seeding survival. R oraation Area 2 (Figure 10) consists of approxima ly 22 acres which was cleared i?flled during past conversion activity. Approximate ,873 cubic yards of fill will be excavated from the area and used to fill the central canal. This should level the area to a similar elevation of the adjacent swamp forest. The six hardwood species mentioned previously will be planted systematically on eight foot centers. This will establish a total of 7,480 trees in this Restoration Area 2. Restoration Area 3 (Figure 10) consists of approximately 4 acres of canal and causeways created to give site access during the previous conversion area. The causeway fill material will be used to fill the adjacent canals. Small hummocks will be left for seedling establishment. Hardwood canopy species will be planted in an identical manner to Restoration Area 1. Restoration Area 4 (Figure 11) consists of approximately one half acre of causeway extending into Shelter Creek Swamp. The causeway fill material (1,210 cubic yards) will be removed and used to help fill the central canal. Small hummocks q., 4t . 1\ will be left for planting. Hardwood canopy species will be planted in a manner identical to that in Restoration Area 1. Restoration Area 5 (Figure 11) consists of approximately 11 acres of cleared and filled swamp forest adjacent to Shelter Creek Swamp. Approximately 26,620 cubic yards of fill material will be excavated and used to help fill the central canal. Swamp hardwood canopy species will be planted in an identical manner to those in Restoration Area 2. Restoration Area# (Figure 11) consists of approximately one half acre of an improved logging path created during past silvicuitural activities. Approximately 2,420 cubic yards will be removed as with Areas 1 and 4. This will bring the area to a similar grade of the adjacent swamp forest. Plantings will be identical to those of Restoration Areas 1 and 4. LO -? Restoration Area (Figure 11) consists of approximately 1.5 acre of canal and causeway associated with the central canal running through Shelter Creek Swamp. The causeway material will be removed and used to fill the adjacent canal. Plantings will be identical to those of Restoration Areas 1,4, and 6. } 4, g r 3.1.2 Swamp Forest Enhancement Mitigation n4 f -- ?6?e j Shelter Creek swamp fore enhancement will be created b he removal of the logging road in Restoration Area 6 whic c isol a 25 acres of Shelter Creek Swamp (Figure 11). The removal of this road will restore the hydrologic connection between the enhancement area and adjacent swamp forest. r. The removal of the causeways, particularly the large central causeway is also expected to have an enhancement affect on the hydroperiod of Sandy Run Swamp. (?L These enhancement effects will be addressed through a functional assessment which will be conducted at a later time. If approved by concerned agencies, this assessment will yield appropriate enhancement mitigation credits. 3.1.3 Swamp Forest Preservation Approximately 179 acres of remnant swamp forest will be preserved Six acres are adjacent to Restoration Area 6 (Figure 11) and have maintained wetland hydrology. Due to the close proximity of this area to the area containing Cooley's Meadowrue, to there is no proposed grading or planting activity proposed for this area. The remaining 173 acres are portions of both Sandy Run and Shelter Creek Swamps. 3.2 Savanna Mitigation 12 The term savanna has been used by many to describe grass-dominated communities that contain scattered trees. A specific, agreed-upon definition has not been developed; however, for the purpose of this project, the definition used by Taggart (1994) in a study of southeastern savannas will be used. That definition is: ". . . a naturally occurring, bi-layered (tree and herb), fire-maintained ecosystem of the southeastern United States coastal plain that exhibits greater that 50% cover by an herbaceous, graminoid-dominated undergrowth, shrub (woody plants less than 2 m in height) cover less than 10% and scattered pines (less than 50% canopy cover) as the overstory dominant". This mitigation plan proposes restore, enhance, and preserve a total of 244 acres of wet savanna (Table 5). This includes the remnant area of savanna and pine flatwoods identified in Figure 13. Due to the patchwork of previous ecosystems, wet savanna will be the target ecosystem of all non-swamp forest areas. 3.2.1 Savanna Restoration Y es -00 1 , (7 3.2.1.1 Hydrological Restoration / 1 ? n The canal from the central portion of the site will be filled from a point approximately 200 feet north of the northern occurrence of Cooley's Meadowrue to they northern end of the canal. The length of the proposed fill is approximately 5,200 feet. In addition all smaller interior ditches and canals (combined length approximately 2,200 feet will be filled. Fill material consisfof material originally excavated from the ditches which currently form berms adjacent to the ditches and material excavated from swamp forest restoration areas. The filled ditches are shown in Figure 12. The eastern and western boundary canals will not be filled since doing so may flood adjacent property not owned by NCDOT. These activities will restore wetland hydrology to approximately 137 acres (Figure 13) which are currently drained. 3.2.1.2 Plant Community Restoration Because the herbaceous layer of that community is largely in place, planting activities will concentrate on the re-establishment of the canopy tree species . Pond -pine, long leaf pine, and pond cypress will be planted at a density of 10 trees of each species per acre. All seedlings will be randomly planted on hummocks, however.30 seedlings will be planted within one acre blocks. Due to the wide planting spacing, all trees will be marked with surveying stakes. Re-establishment of wiregrass (Aristida stricta) and dropseed (Sporobolus sp. 1), two species of grass, will be attempted. Plants will be transplanted from the remnant 13 wet savanna defined by LeBlond (1996) to scattered locations throughout the site and allowed to naturally repopulate suitable areas. 3.2.2 Savanna Enhancement N The goal of savanna enhancement will be the restoration of a typical plant community to 99 acres of remnant savanna area that has maintained its jurisdictional status (Figure 13). The planting strategy will be identical to that of the savanna restoration area. 3.2.3 Wet Savanna Preservation Approximately eight acres of wet savanna will be preserved (Figure 13 ). This area is a remnant.,pine savanna very wet clay variant described by LeBlond. This area contains Cooley's Meadowrue. No manipulation of this area is proposed due to the presence of and other threatened plants 3.2.4 Upland Enhancement Savanna plant community species will be re-established in those remnant dry savannas on the site (Figure 13). Long leaf pine seedlings will be planted at a ratio of seedlings per acre in these areas. 4.0 MITIGATION PLAN IMPLEMENTATION SCHEDULE 0 11 0 The mitigation plan will be implemented in two phases. The first phase will involve Swamp Forest Restoration Areas 1,2, and 3. Grading and shaping of theses areas will take place in the summer and fall of 1998 with planting during the dormant season of 1998-1999. Implementation of the remaining sections will be conducted in consultation with appropriate agencies. 5.0 MONITORING PLAN r ' tcl 5.1 Swamp Forest Monitoring 5.1.1 Hydrological Monitoring Three WL-40s will be established in Restoration Area 2 (Figure 14). Two identical wells will be established in Restoration Area 5 (Figure 15). Data will be collected from these wells on a daily basis. No wells will be installed in other Swamp Forest Areas. The other areas will be assumed to meet hydrology criterion due to the high water tables of adjacent areas. Success criteria will be the restoration of a N 94 1 groundwater table at or above 12 inches from the soil surface for 12.5% of the growing season during reasonably normal periods of precipitation. Precipitation data will be obtained from the public works office at Holly Ridge, North Carolina. Groundwater levels will be monitored until the success criteria is met. 1 1 1 1 1 / 5.1.2 Plant Community Monitoring 5.2 Savanna Monitoring 50'x 50' sample plots will be established adjacent to each well In Restoration Areas 2 and 5; with one plot established in each of the other restoration areas (Figures 14 and 15). Sampling will be conducted annually. almaple, ss criteria will be the establishment of 320 trees per acre at the end of th it year, including acceptable volunteer species. Non-acceptable species will be sweet gum or any pine species. 5.2.1. Hydrologic Monitoring ' 5 15 WL40s will be installed as shown in Figure 16. Data these wells on a daily basis. Success criteria will be the establ saturation within 12 inches of the soil surface for 12.5% of the i will be monitored until the success criteria is met. 5.2.2. Plant Community Monitoring Due to the low density of planted species in the savanna al areas will be required. Three ten acre sample plots will be establi one in each of the savanna restoration area, savanna enhanceme enhancement area. Entire plot density sampling will be conductec criteria will be the survival of 20 trees per acres by the end of th&4 f LLB 6.0 AS -BUILT REPORT AND DRAWINGS 7 Z - 4%la 1 1 As-built drawings, photographs, plans, and specifications will be ptovided to the appropriate regulatory agencies within 90 days after the mitigation project is completed. Monitoring reports, including photographs and problem areas, will be submitted within 30 days of annual sampling. ti ? A 7.0 DISPENSATION OF PROPERTY j P. :.i I be collected from ;ient of inundation or ng season. Wells large sample 1(Figure 16): rea, and upland nualiv. Success 15 NCDOT will maintain ownership of the property until all mitigation activities are completed. Although no plan for dispensation of the Haws Run Mitigation Site has been developed, NCDOT will deed the property to a resource agency (public or private) acceptable to the appropriate regulatory agencies. Covenants and/or restrictions on the deed will be included that will ensure adequate management and protection of the site in perpetuity. 8.0 LITERATURE CITED Beatty, S.W. 1984. Influence of microtopography and canopy species on spatial patterns of forest and understory plants. Ecology: 65:1406-1519. Cowardin, L. M., V. Carter, F. C. Goblet, and Edward T. Laroe. 1979. Classification of Wetland and Deepwater Habitats of the United States. Fish and Wildlife Service, U. S. Department of Interior. DEHNR, 1994. Hydric Soils Investigation. Haw Run Tract, Onslow and Pender Counties. NC Department of Health, Environment, and Natural Resources. Division of Soil and Water Conservation, Technical Services Branch. Department of the Army (DOA). 1987. Corps of Engineers Wetland Delineation Manual. Tech. Rpt. Y-87-1, Waterways Experiment Station, COE, Vicksburg, Mississippi. FHWA, 1991. Final Supplemental Environmental Impact Statement, Smith Creek Parkway and Downtown Spur, Wilmington, New Hanover County, North Carolina. State Project Number 8.2250102, U-92, Federal Project No. M-5851(2). Huenneke, L.F. and R.R. Sharitz. 1986. Microsite abundance and distribution of woody seedlings in a South Carolina cypress-tupelo swamp. The American Midland Naturalist 115:328-335. Resource Southeast, Ltd. 1995. Wetland Delineation Report, Proposed Section C and the 23rd Street Connector, Smith Creek Parkway. Schafale, Michael P. 1994. Inventory of Longleaf Pine Natural Communities in North Carolina. North Carolina Natural Heritage Program, Division of Parks and Recreation. NC Department of Environment, Health, and Natural Resources. Schafale, Michael P., and Alan S. Weakley. 1990. Classification of the Natural Communities of North Carolina, Third Approximation. North Carolina Natural 16 1 Heritage Program, Division of Parks and Recreation. NC Department of Environment, Health, and Natural Resources. 1 Taggart, John B. 1994. Ordination as an Aid in Determining Priorities for Plant Community Protection. Biological Conservation, 8(1994):135-141. U. S. Department of Agriculture (USDA). 1990. Soil Survey of Pender County, North Carolina, USDA Soil Conservation Service. U. S. Department of Agriculture (USDA). 1992. Soil Survey of Onslow County, North 1 Carolina, USDA Soil Conservation Service. 1 / 1 1 18 I• I• I• I• I• • I• is r -: /Jj ? ? J/y 1 1 A .. - T Site ? ^; CF 1 = 1 Ef Y, gh- 2 A ? 1h:?? 1. ?` ?mil 4 Y fy?, ??t? ?(l.?? ? ? < R .. ? ,? 12.5miles Figure 1. Vicinity map of LAND MANAGEMENT NC DOT Haws Run Mitigation Site. GROUP, INC Haws Run Mitigation Site February 17, 1997 Pender/Onslow Counties I• J J 4 I0 I I• • • I• 19 N Sh#Ater Creek ?wa* h` t i Figure 2. Haws Run Mitigation Site. LAND MANAGEMENT GROUP, INC Febraury 17, 1997 SCALE 1` _ -1667' NCDOT Haw's Run Mitigation Site Pender/Onslow Counties, NC le 3 I ? 20 I• '• I• I• I• I• I• LEGEND Swamp forest (-44 acres) Wet savanna (-138 acres) ® Dry savanna (-40 acres) Pine flatwoods (-169 acres) Figure 3. Ecosystems identied in the central portion of the site. LAND MANAGEMENT GROUP, INC February 17, 1997 ?P&L _ine e Transmission SCALE 1" = 1300' NCDOT Haws Run Mitigation Site Pender/Onslow Counties, NC 19 21 II I• I• !• i• site boundary SCALE 1" = -x1300' I• Figure 4. 1966 NRCS aerial photo showing logging path. LAND MANAGEMENT GROUP, INC February 17, 1997 NCDOT Haws Run Mitigation Site Pender/Onslow Counties, N I• 22 'I 'J I• '• 19 Figure 5. NRCS soil map. LAND MANAGEMENT GROUP, INC February 17, 1997 SCALE 1" = 2000' NCDOT Haws Run Mitigation Site Pender/Onslow Counties, NC I0 23 • I• I• I• ?9 I0 I• 4FpV4q /• PFOIl4A .. U" SCALE 1 2000' Figure 6. Nwl map of site. LAND MANAGEMENT NCDOT GROUP INC Haws Run Mitigation Site February 17, 1997 Pender/Onslow Counties, NC N - 11 A y I -- Q 1/4C ?- - PFOil4? - Haws Run Mitigation Site . ? QtlBFx l U 1?p PFO?B ?Vol, 24 ?J 'J I? I YIN ? 54K I I \\„\\ oa ,,r iI I . 11 0 I• J Non-hyd-ric soil *000 SCALE 1" = 1500' Figure 7. NCDSWC hydric LAND MANAGEMENT NCDOT soil delineation of the interior GROUP, INC Haws Run Mitigation Site portion of the site. February 17, 1997 Pender/Onslow Counties, N I0 0 25 • I• I• '• I• I• I• LEGEND ® Uplands (-282 acres) . 404 wetlands (-110 acres) Letters indicate well locations x = wells installed at 50' and 250' intervals from ditches Delineation is based on two years well d historical photography, and soil mappini i0 P&L ransmission Line e SCALE 1" = 1300' I• Figure 8. Well location and wetland delineation of interior portion of tract. LAND MANAGEMENT GROUP, INC February 17, 1997 NC DOT Haws Run Mitigation Site Pender/Onslow Counties, NC 26 I• 1• • ' Figure 9. Observed distribution of Thalictrum cooleyi. LAND MANAGEMENT GROUP, INC February 17, 1997 2 1320' NCDOT Haws Run Mitigation Site Pender/Onslow Counties, NC I0 i I0 27 I(D I(v I• 4i, -ok 0, ' r Re"s. ration Area 1 f Restoration = g , Area 3 , Re!% .2tion Area 2 f SCALE 1 500' I• Figure 10. Restoration Areas of Sandy Run Swamp LAND MANAGEMENT GROUP, INC February 17, 1997 NCDOT Haws Run Mitigation Site Pender/Onslow Counties, NC ;1 I1 I• I• • I• I• 0 le N z k -? tilt 4 ? er t' .. x S 1 S- _ 1 t ?a sF'- 7c ,R ? Qr• sae: x aa? . ?+ -.,?r:...:r_ •x-• L r?Y rI 0 0 LO W J U N ? a) Cf) I= .C O F- ? U 0 o Z =0 C4 V/ M 0 =a Z 20 0) W Z am _ .- C? ti r z m C 0/ t? G LL O LL Q J C C d ow O?0 oa 0 E 7 ?., ?Q ca O)N d 3 LL L mu) 0 r 29 I• • • I• I• i• Q Cleared boundary N LEGEND Non-impacted diches/canals Dtiches/canals to be filled Figure 12. Ditches to be filled in Savanna mitigation area. LAND MANAGEMENT GROUP, INC February 17, 1997 CP&L Transmission Line r SCALE 1" = 1300' NCDOT Haws Run Mitigation Site Pender/Onslow Counties, NC I0 30 1 I? I• I• I• I• • I• LEGEND Restoration Area (137 acres) Enhancement area (-99 acres) . Preservation Area (-8 acres) ® Upland Enhancement (-40 acres) . Swamp Forest Restoration . Cooley's Meadowrue Area (not impacted Figure 13. Savanna mitigation areas. LAND MANAGEMENT GROUP, INC February 17, 1997 SCALE 1" = 1300' NCDOT Haws Run Mitigation Site Pender/Onslow Counties, NC I0 0 31 I• I• I0 I• I• 1• I• ?tesoration Area 1 Restora- k Area 3 N •1 k? ? e .b t n, = Re, s- - - 1 .a - r . f- , } tyF'ty v r: LEGEND ® = Monitoring wells X =Sample Plots Figure 14. Well locations and sample plots in Restoration Areas 1-3. LAND MANAGEMENT GROUP, INC February 17, 1997 SCALE 1 " = 500' NCDOT Haws Run Mitigation Site Pender/Onslow Counties, NC 140 • 0 I9 • 10 I • N CV) *J L) 40 r ? F : :r tit Nt. .?f1 = _ 1' \: ? ?yjF ?r-tf r ? 'r•? ? O O ` L- AW sT L ?' tm S. R O iL W.- le +. .{??t 4 1,?, V+ a 0 1 I• 33 I• i• • I• • I• I• '• LEGEND Numbers indicate well locations ® Restoration sample plot Enhancement sample plot ? Upland enhancement sample plot ® Swamp Forest Area I Figure 16. Savanna well locations and sample plots. LAND MANAGEMENT GROUP, INC February 17, 1997 CP&L Transmission Line Ale Non-impacted area SCALE 1 " = 1300' NCDOT Haws Run Mitigation Site Pender/Onslow Counties, NC 10 34 Table 1. Characteristics of soils of the Haws Run Mitigation Site. Soil Series Drainage Location Hydric (Y/N) Community Type Foreston Moderately Interstream N Various well divides Pine/HW Grifton Poor Shallow Y Various depressions Pine/HW Muckalee Poor Flood Plains Y Swamp Forest Stallings Somewhat Interstream Inclusions Various poor divides Pine/HW Torhunta Very poor Interstream Y Various divides Pine/HW Woodington Poor Interstream Y Various divides Pine/HW 35 Table 2. Summary of chemical and physical characteristics of soils from Haws Run Mitigation Site. Locatio n Wetland (Y/N) Depth Class HM (%) WN CEC BS (%) pH A N 0-6" Mineral 1.55 1.20 3.4 59 5.4 A N 12-18" Mineral 1.31 1.12 2.5 40 5.0 B Y 0-6" Mineral 1.94 0.91 10.6 92 6.2 B Y 12-18" Mineral 1.25 1.13 6.4 97 6.4 D Y 0-6" Organic 5.53 0.82 6.1 31 4.4 D Y 12-18" Organic 5.85 0.92 5.0 22 4.3 E N 0-6" Min/Org 4.69 0.97 8.3 70 5.4 E N 12-18" Min/Org 4.69 1.14 4.9 43 5.0 F N 0-6" Mineral 2.76 1.07 7.2 82 5.8 F N 12-18" Mineral 1.67 1.22 5.2 92 6.4 H Y 0-6" Organic 10.00 0.88 6.3 14 4.3 H Y 12-18" Organic 7.96 0.71 17.1 78 5.3 J Y 0-6" Mineral 1.31 1.03 5.2 54 4.7 J Y 12-18" Mineral 0.92 1.23 3.0 60 5.2 K N 0-6" Min/Org 4.95 0.78 6.8 21 4.2 K N 12-18" Organic 7.96 0.79 7.7 13 4.1 Notes: Wetland (Y/N) - Denotes whether sample was collected in an area designated as wetland Depth = Depth from which sample was collected Class = Soil type HM (%) = Humic matter content WN = Weight per volume (g/cc), Soil density CEC = Cation exchange capacity BS (%) = Percent base saturation pH = Acidity co CV) 1 r ai C 0 cc rn c 7 w cts u N N .Q E E 0 N Q E N c c 0 ct: E ,° c 1 ch N F- Cl) UO v rn . °? co r`' ch v ch M 0 M •? X C) W L co - N co - N Q 0 O L U- M 0 ¢ ¢ m m L x w m a m E Q (may Q co N m cc N M 1 1 1 1 c O c 1 ? 0 1 r Rf Q.. N M c O / c O E O N B m H N N L 0 3 +. c c O c ° E E ° ° O U ° o 3 3 O c ° ° 'Y Y _ t co v v cU) CL. cU) w U U U) U) a U w w U U of to ? a U U U 'CV U w O U) U- (? (7 r LO N LO M - tt V- o m cn 0 0 0 m o o h C7 C7 C7 C7 C7 C7 C7 M :I O cri 1 Co ° vOi _ O co C CEI 3 S?l N > .4 co O E 0 O N L O > c - V .? p -C cB a O Z tq c o . L V E E k O O O O U O i O _ Co v ° x °?' Z3 : a c v a a s Cz Q Q Q ? 0 cr. co (o n ? x - k 0 v m a L aci C ? 0) co awUa` m 215e....w G9fnwUIL 78 d c m ? co o ??p N.8U 3 d1 ?:0 \ ?J waU? T fC > d f0 7 -8 U N N ?+ « ip N O ?5>.m 7 T$ ? C y ?Uw?Ow ? N C7 ? jvj C9 C7 0 0 C?1 0 IN 0 0 1 0 ao M C O C 3 ca S O m ca a? L O tm E 0 O a. .U N 0 N F" C) d LO cV M r` M m w 0 w rl- w W La C ca N d L C N E V co QD U cc m .C Q O N C O N O .r N aN L W O N U (if LO 14, d CL LO N H cr _ O _ N am ? U N tB O 0 a 0 O E +. O E +• f4 w ciS O) co rn O . U = c4 am O +r U O co N c E + N C N C cn ca a. O of w a w w a =3 z 0 c O 4- m rn ?F+ w, W CL CO) (D N -° E U 3 z O N O m Q O W N CO) N H U F- U C? LL LL LL Rf ca as ca c!J O O ca CL E a. E a. E ca c cv c m c ca Q t Q i> Rf c6 Rf > > > > U o ~ ? '- co Q co co co U) co co co Vj 1230TES OA 14 0 RUN -XITI1GATIOR SITE, ON2LOW COUNTY R. J . LeP2 ono - 6/18/96 s pnr! , row owned b;: DOT, is located along the Onslow/pander 1 Co! lire west of the Hancock property and south of :,'w fm") ar,' the XAp2e Mill and Maple Hill GW ouQ4e, Sandv Run site nn i Tune 13 and 17 and htsva found' 8 rare plant.. sspeciee+?e i1iip.ludi:,s? one Federal Endangered (Thalictrum c.ooleyi) and 4 F*deraI nad1 date speccies (Carey lute p P, a 7jc:hcr cra decurren? _y lantagQ snarsilo2-tt, 1 E;,,n7,_._._ R. Lhorne) . Amon these a .E rr ecies, 3 are 4 State a at.tzrn, ;Cln IJ Other re:re species include, Arno Ioesum dium mariscoides, and Rh nchcsqpP--- cra rff-`---. P retort:7n. '-f 2:e parcel-is urge, total in , ElobLla. is var. 9?7--ni it woo c:l. i$ acr aa. Ro ar-cut than ear-cut with serious ground disturbance, ja` i'-'•c?ir eurfn,:e regradinfi ° over lac d?te7-_,i r.aC large - areas. I have tentatively that the clear-cutting took place betwsen 1077/79- 1 193 'jha site does not MpDsar as cleared oil the 1981 topos (baa.ed on, 1977 photo with 1978 field check), but ands show up as c•l,enred o.n 1983 photographs used for the 1492' Onelow Co. toils at.`las. i Sa f ar•, any exploration hers been most.l the bin 1..hen v "sited to a 35-ware area ?at end cf the c1te, south of the access road from i'ht t# _Ir property. e U Sail.a are wettest in this area, and the nalce . <l es nOt aPPenr to have bee:i riggrcded, at least not }.i en ry. The west e%ncl sou;.h side s of this area are fcrastad a xnix of s sale Li+ F s, including Taxodium asc odendron, Xv a _biflorc a _endvn-, 1 of.1 :`PTr _t.aec+?, -" There. --- and advenr.iva Cur -*'eilsd pl!,ntin-B is remnant Pine Savanna Very Wet Clay Variant"rr-?t.hiin- the west side forested area. I have so far seen 1` ''erg's Hof savanna, but. there.' here may be more based on the aerial photo. The flora is fairly diverse its the claar9ci a.rera south of T.h road, with Carex lutea do:aint%ting a 30x3' patch and kh1 nchnsa;?cra thorriei ---_--h-___ ?? ?•--------? a pc _ dominant to dominant for 20 (-lOta t?) 1 ac-e- s, T?ialic:trun coalev i, Planta?o anaraiflora o -_ 0 1 dQ s , and Clactiu_m c ar are r ri' ed to est• t. two ditches at the sits, whi.oh als,.3: contain Carey lutem and A_r_ncxlcssum (the latter also i ati: the savan"Ia remnant), i Rh?nohoancra 1 obu p_ 't arum Pppeare to be abundant in the c1e d areas north Lan. scu F a3'_ t;,e Access road, R. dec_u_rrens wasfound cnaisQd 1 (bA.? wet.) ?%bar,doned roadbed off the booth end of the cleared area. . i The Yignif kance of the mite is at least statewide and p: obab • nat.k )atal . !it %nontaine the 11th currently known global population __ _ ttrn G_oo_1 tIi , the 6th globally known population of C_a_re_X 1 I`nt C31 t. t,hetrbt h currently ;cnawn population of P i an , sparBl f l cra CarolaRo ina, ?ne or rew currently lcnowr?-KToc,a2` FO-TT, yrcig f or, the 1 1 i.t• 1 e-•ltnown ?rkL?ch__ ost>Q^s decurrez:s • :.?,I•??;,.t l:t? ??::: ;• , and the world' e c a ? .,„ .:".11ntion of Rh 7ic:r,oopora +harnei. Pine Savanna Very C' iy v a r i n nt. le. - --- ?= n very rare na 4ur-R 1- community I -'rtr;`_tF it.c: tha Maple Hill. an? Old Dock areas of eas. ar n No -?h 1 ti-:?r 71n. ;s a likely sits for Allitim sp. 6th kr,riIlcabal e.ita for that species 1' a nd would be the i •I ?'?''' f {?d worl: is re?ufi•Ed to determine the L'i1 num ex't.gnf• c, rare species here. f ber and 1 Hl:$t3,er??re sl,ecies ct:rrentl It is important to determine -'kt?rtiu:: ui 1 Thalictrulr y known only from two jar se ditches-- oc.GUr fn, remi;art?envsniac?oleYi and Plania _o s arei#lorrr-- i in recovarin c Qarad't?raae. a-so 1ny under st.aadi r:g that DOT would 411ke to ' It is sy desirable for nat.urnl corL?unit f`oed the ditches, Iwhich d?e?aetratje: for the ditch-canf inad rare apecieEtlt1 .1, but may be 1 {lU"dJ" c::-%n be phtsaed in with J13dicloua habitat restPerhapa oratio d n. 1 I i 1 1 1 I j C?OT r- ?-.rte- ?_ 'S,! _ ?,/._.. /) ? _ ^'h ,; -:'. 1 s ? '.r ' ^, ?_- „4' V? ///?` ?rl ?? ? •^? ?! ? ?_. ?- ?/? Imo- ?? ' `,.?? r ?r •? { 1 J ay 719 It Ci d? ,+•? {?? 1 ,a'l?'?i? X11! t`?6? tc^ ?? it .. 1 1t ! ;? t dG%`? ti' `? t + 1 ?•? lias?"t°"? . ? 1 C ? ,t ' 1 •.? , - ? ?, 1 ? ., 1t ? ? i' } 41.4 j, I , 1'\ ! J ! t .. i ;llt ?`--^'•-^--? --max ` wt yy ? ? .. •' :., ? w ?r• ! it / ! ?t .y i _ .v. _ _ `L. x • f F" F _ _ lit ,?. - _ ? ter' ? b •] /y?• .. jr?.:..,-?-?M •.0.I" ?. ?" ?1 r?ar'ce?j ioFr1, 5 ?0 a?Yes? NG ?? *+•'r;r ?•'• ! • I , *''??„'ww•• u8'WS Ruh 1`'1t?'l?ga•l°?o?t .? •'t."Qr 1. j ? P8Yce1 -7o?-33, c-3 acres, • u 1 4,• \M.rrrbr•-nr..- .- Na,'?'iv?'tS !rJB+tik ?l?.t,3?lCi?d-? Sr:St.,('V?CGS 1 1.5 '.1 Of / {R? O Ck?.? $r E 8 i f 77 lop 62.rcx f'vfCa GLtc?tUU? ttit:irtsCnc,lcS ' 'i"? 01`Iti$ F 1 `i G+td 5?}vro'i •'? i it ? T?s?li<l?'rvr+-, caal? i 02, i?' it .^?- - t u?ttLt05 r, Gi<.?V?'2rt1 vay% j ?? Q ?(.?L°a! ?wYLtG?Ws?dr? 'f'?t.ov?Y'.L 1 `?1 ? ?? it ,,,... -? / opicy; ? it ! 1 .1 V81 i ??: ? , ?1 ? ??•j?cl?vspdY? d3t~v?r,??us t ; . .5 ? ?? ,.? • t tit ????" ?. ?I? . ? ? 11 { . ?, t .- "'•• •• li- •!y'.v- olro , ..yam .•_ t ?. ?{ .?}?... ^"il`_ -?},,, + ••.+i?• -^w,•- r..''? - • ti'- r.----_ - -it=?Y- ..?. -,:?•-?• -- _,,=;`?• lip. 1 I ! .:Ll.;? "{y. • 'wt ?1?. »Mwy •'-•??• .,y_ .J•+. 'Ito t Pare e`'i r- ' a 1 i LA st ti «?.,.Epfp:,. W W W W W W W W W W W soil Test Report I N.C. CITIZENS T( How To Interpret Your Soil Test A critical part of your soil test report is the pH and the amount of lime and fertilizer required for optimum tree and seed production. The target pII for crops In this category is 5.5, except for hardwood seed where the target pll is 6.0. The amount of lime recommended is based the target pII, amount of acidity in the soil, soil class and the target pII of the crop. Lime and fertilizer rates are given in tons and Ibs/acre, respectively. Maximum benefit from lime and phosphorus application is obtained when they are incorporated into the soil prior to planting. Surface application on established sites Is appropriate when recommended. Under extremely acid conditions, lime is just as Important and may have just as much benefit as applying the proper amounts of fertilizer. The amounts of phosphorus and potassium recommended decreases as the soil test level increases. Guidelines for evaluating soil test index and crop response are shown in the table below. Local agricultural advisors can assist you in selecting a fertilizer grade that fits the recommendations. Additional Information regarding lime and fertilizer Is contained in Note 11 that accompanies this report. Soil Test Index *Rain ° RdttriW` Crop Response to Nutrient Application ""„`1Jifrni a;f'i4Elrkt Frga '"'> 0-10 Verv Low Very H' Very Hi Very Ili Very Hi Very Ifigh 11-25 Low Hi Hi Ili Hi Hi 26-50 Medium Medium* Medium* None None None 51-100 Ili h None Low-None None None None 100+ Very 11101 None None None None None * Response decreases as soil test index increases NCDA Agronomic Division 4300 Reedy Creek Road Rale gi • W W W W W '-6465 (919).733-2655 Grower: NCDOT - REU Attn:Randy Wise 1'0 Box 25201 Raleigh, NC 27611 ??? 3 oil Replort Test Farm: 6/25/96 SERVING N.C. CITIZENS FOR OVER 50 YEARS Onslow County Report No: 34626 Copies to: County Extension Director NCDOT - P&E NCDOT-P&E Attn:Dave Schiller PO Box 25201 Raleigh, NC 27611 Agronomist Comments: Most areas have low levels of phosphorus and potassium. Soil p1i of most of the mineral soil sites should be adequate for pine or related species. In these areas application of phosphorus and potassium should be adequate for tree growth. The organic areas are quite acidic and have low levels of phosphorus and potassium. In areas where the plI is approaching 5.0,1 would not see any need to apply lime. However in areas where the pH is below 4.0, lime application should benefit. I would think a maximum of two tons lime /acre should be adequate. In most cases a ucauon Or ou-bu iDS of nos naie anQ oiasn Snoma De aue uate ror estaDnSnmem. M. Ka IUCKer Agronomist. Tield Information ` lied Lime Recommendations Sample No. Last Crop o Yr TlA Crop or Year Lime N R05 ICO Mg Cu Zn B Mra See Note 06HRA 1st Crop: Pine,E 0 0.0 60-80 50-70 0 $ 0 11 2nd Cro : Test Results Soil Class HM% W/V CEC BS% Ac pH P-1 K -I Ca% Mg% Mu-1 Mn-AI (1)Mn-AI (2) Zn-I Zn-AI Cu-I S-1 SS-1 Not-N NIL-N Na MIN 1.55 1.20 3.4 59.0 1.4 5.4 6 7 43.0 15.0 10 35 35 16 30 9 0.1 Field Information App fi6d. Lime Recommendations Sample No. Last Crop No Yr TIA Crop or Year Lime N R05 Kz0 Mg Cu Zn B Mn See Note 28HRA 1st Crop: Pine,E .5T 0.0 70-90 60-80 $ $ $ 11 2nd Cro : Test Results Soil Class IIM% 1VIV CEC BS% Ac pH P-I K-I Ca% Mg% Mn-I Mn-AI (1)Mn-AI (2) Zn-I Zn-AI Cu-1 S-1 SS-1 NQt-N NIL-N Na MIN 1.31 1.12 2.5 40.0 1.5 5.0 0 5 28.0 10.0 4 25 25 6 31 8 0.1 Field Information lied Lime .Recommendations Sample No. Last Crop o Yr T/A Crop or Year Lime N R05 KO Mg Cu Zn B Mn See Note 0611RB 1st Crop: I'ine,E 0 0.0 60-80 50-70 0 $ 0 11 2nd Cro : Test Results Soil Class HM% iVIV CEC BS% Ac pH P-1 K -I Ca% Mg% Mn-I Mn-AI (1)Mn-AI (2) Zn-I Zn-AI Cu-1 S-I SS-I NQt-N NIL-N Na MIN 1.94 0.91 10.6 2.0 0.8 6.2 5 10 86.0 7.0 62 46 46 13 25 11 0.1 .Field°1nf6rmati6n lied Lime Recornmendatious Sample No. Last Crop Ho Yr T/A Crop or Year Lime N R05 Ka0 Mg Cu Zn B Mn See Note 281-IRB 1st Crop: Pine,E 0 0.0 70-90 60-80 $ $ $ 11 2nd Cro : Test Results soil class IIM% iVIV CEC BS'rb Ac p1l P-1 K-1 Ca% Mg% Mn-I Mia-AI (1)Mn-AI (2) 7n-1 Zn-AI Cu-1 S-1 SS-1 NQt-N NIA-N Na j MIN 1.25 1.13 6.4 97.0 0.2 6.4 1 4 92.0 4.0 27 21 21 8 16 9 0.0 NCDA Agronomic Division 4300 Reedv Creek Road RAleinh: W. 17MM6,iC,; toiM Iii-,)Kcc r-,- ..?On?IV nn JEF"Ll 1 ield4nformatiou App lied Lime Recommendations Sample No, Last Crop o Yr T/A Crop or Year Lime N h05 K20 Mg Cu Zn B Mn See Nate 0611RD 1st Crop: Pine;E LIT 0.0 40-60 40-60 0 $ 0 11 2nd Cro : Test Results Soil Class HM% W/V CEC BS% Ac pH P-1 K-I Ca% Mg% Mn-I Mn-AI (1)Mn-AI (2) Zn-1 Zn-AI C11-1 S-I SS-I N0j-N NIlt-N Na ORG 5.53 0.82 6.1 31.0 4.2 4.4 12 12 22.0 9.0 8 43 71 25 0 1 Field information > )lied Lime Recommendations . Sample No. Last Crop o Yr T/A Crop or Year Lime N h05 1W Mg Cu Zn B Mn See Note 281-IRD. 1st Crop: Pine,E 1.2T 0.0 40-60 50-70 $ $ 0 11 2nd Cro : Test Results Soil Class HM% W/V CEC BS% Ac pH P-1 K-1 Ca% Mg% Mn-1 Mn-AI (1)Mn-AI (2) Zn-I Zn-AI Cu-I S-1 SS-1 NO t-N N1b-N Na ORG 5.85 0.92 5.0 22.0 3.9 4.3 14 11 14.0 7.0 6 56 93 10 26 9 , 0 0 'Field information lied Lime Recommendations . - Sample No. Last Crop o Yr T/A Crop or Year Lime N R05 IW Mg Cu Zn • B Mn See Note 061-IRE 1st Crop: Pine,E 0 0.0 40-60 50-70 0 $ 0 11 2nd Cro : Test Results Soil Class HM% W/V CEC BS% Ac pI1 P-I K-1 Ca% Mg% Mn-I Mn-AI (1)Mn-AI (2) Zn-I Zn-AI C:t-I S-I SS-I NO t-N N1b-N Na M-0 4.6 0.97 8.3 70.0 2.5 5.4 12 7 63.0 7.0 18 44 55 11 20 8 . 0 0 Field Information ?pp fied Lime Recommendations . Sample No. Last Crop o Yr T/A Crop or Year Lime N h05 K0 Mg Cu Zn B Mn See Note 28HRE 1st Crop: Pine,E 9T 0.0 60-80 60-80 $ $ 0 11 2nd Cro : Test Results Soil Class 11M% W/V CEC BS% Ac PH P-1 K-1 Ca% Mg% Mn-1 Mn-AI (1)Mn-AI (2) Zn-I . Zn-AI Cu-1 S-1 SS-1 NQt-N NIf-N Na M-0 4.69 1.14 4. 43.0 2.8 5.0 6 3 37.0 5.0 5 28 35 7 23 7 0 0 Field Information a ' lied Lime Recommendations . Sample No. Last Crop o Yr T/A Crop or Year Lime . N h05 JW Mg Cu Zn B Mn See Note 061IRP 1st Crop: Pine,E 0 0.0 50-70 50-70 $ $ 0 11 2nd Cro : ' i esi xesuits Soil Class IIM% W/V CEC BA' Ac pH P-1 K-1 Ca% Mg% Mn-I Mic-Al (1)Mn-AI (2) Zn-I Zn-AI Cu-I S-I• SS-1 Not-N N11i-N Na MIN 2.76 1.07 7.2 82.0 1.3 5.8 9 8 78.0 4.0 15 49 49 11 24 9 0.1 NGDA`Agronomic Division 4300 Reedv Creek Roars RAIvinh NV. 1'790-7_E:iG; rnio? -722`_vj1cc t,? .., .,? .,.,I _ Field;Information " lied Lime Recommendations Sample No. Last Crop o Yr r/A Crop or Year Lime N h05 ICO Mg Cu Zn B Mn See No{e 281-IRF 1st Crop: Pine,r o 0.0 70-90 6o-8o $ $ 0 11 2nd Cro : Test Results Soil Class HM% W/V CEC BS% Ac pH P-1 K-1 Ca% Mg% Mn-I Mn-AI (1)Mn-AI (2) Zn-I Zn-AI C11-1 S-1 SS-1 N03-N NIL-N Na MIN 1.67 1.22 5.2 2.0 0.4 6.4 2 3 89.0 3.0 6 35 35 9 41 12 0 0 FieldInformation lied Lime Recommendations . Sample No. Last Crop o Yr r/A Crop or Year Lime N R05 Kz0 Mg Cu Zn B Mn See Note 06HRII 1st Crop: Pines 1.6T 0.0 50-70 50-70 $ $ 0 11 2nd Cro : Test Results Soil Class HM% W/V CEC BS% Ac PH P-1 K-1 Ca% Mg% Mn-1 Mn-Al (1)Mn-AI (2) Zn-1 Zn-AI Cu-1 S-1 SS-I NQt-N NIL-N Nit ORG 10+ 0.88 6.3 14.0 5.4 4.3 9 9 11.0 3.0 9 5 158 10 1 4 0 1 Field Information 4 lied Lime .Recommendations . Sample No. Last Crop o Yr r/A Crop or Year Lime N R05 KO Mg Cu Zn B Mn See Note 28HRH 1st Crop: Pines 0 0.0 30-50 30-50 0 $ 0 11 2nd Cro : Test Results Soil Class HM% W/V CEC BS% Ac pH P-I K-1 Ca% Mg% Mn-1 Mn-AI (1)Mn-AI (2) Zn-1 Zn-AI Cu-I S-1 SS-1 N0 1-N NIL-N Na ORG 7.96 0.71 17.1 78.0 3.8 5.3 20 1 73.0 4.0 29 103 171 8 24 12 , 0 1 Field information 1 lied Lime Recommendations . Sample No. Last Crop Mo Yr r/A Crop or Year Lime N h05 ICO Mg Cis Zn B Mn See Note 06FIRJ 1st Crop: Pine,E IT 0.0 60-80 50-70 $ $ 0 11 2nd Cro : Test Results Soil Class HM% W/V CEC BS% Ac pH P-1 K-1 Ca% Mg% mil-I Mil-AI (1)Mn-AI (2) Zn-1 Zn-AI Cit-I S-1 SS-I N01-N NIL-N Nit MIN 1.31 1.03 5.2 54.0 2.4 4.7 4 9 48.0 6.0 10 47 47 11 26 0 1 Field Information fed Lime Recommendations . Sample No. Last Crop o Yr r/A Crop or Year Lime N h05 &0 Mg Cu Zn B Mn See Note 28HRJ 1st Crop: Pine,E .3T 0.0 70-90 60-80 $ $ 0 l l 2nd Cro : rest itesults MIN 0.92 123 (1 (n n 1 2 S 9 ! e/ n c n •- - - °- - - t??....... JJ-1 /V(B-N NtC,-N Na NCDA Agronomic Division 4300 Reedv Creels Road Raleigh. NC 27607-6465 (919) 711-2655: Grower: NCDOT - RRIi Rennrt Na- 14626 Ptr Zi Field: Information , " lied Lime Recommendations Sample No. Last Crop 1o Yr T/A Crop or Year Lime N h05 KO Mg Cu Zn B Mn See Note 06HRK 1st Crop: Pine,E 2.9T 0.0 50-70 20-40 $ $ 0 1.1 2nd Cro : Test Results Soil Class HM% W/V CEC BS% Ac pH P-1 K-I Ca% Mg% Mn-I Mn-AI (1)Mn-AI (2) Zn-I Zn-AI Czi-1 S-I SS-I N($-N NIb-N Na M-0 4.95 0.78 6.8 21.0 5.4 4.2 11 22 14.0 4.0 12 51 64 11 28 2 0.1 Fleld`Information Ap lied Lime Recommendations , Sample No. Last Crop Ho Yr T/A Crop or Year Lime N A05 ILO Mg Cu Zn B Mn See Note 28HRK 1st Crop: Pine,E 2AT 0.0 50-70 40-60 $ $ 0 11 2nd Cro : Test Results Soil Class HM' W/V CEC BS% Ac pH P-1 K-1 Ca% Mg% Mn-1 Mn-AI (1)Mn-AI (2) Zn-I Zn-AI Cu-1 S-I SS-1 N03-N NIf-N Na ORG 7.96 0.7 7.7 13.0 6.7 4.1 11 15 8.0 4.0 6 63 105 7 26 2 0.1 FieldInformatio?i 1 ' lied Lime Recommendations Sample No. Last Crop Ho Yr T/A Crop or Year Lime N n05 K0 Mg Cu Zn B Mn See Note 061iRP Pine,E 1st Crop: Pine,E 2.2T 0.0 40-60 40-60 $ $ 0 11 2nd Cro : Test Results Soil Class HM% W/V CEC BS% Ac pH P-I K-I Ca% Mg% Mn-I Mn-AI (1)Mn-AI (2) Zn-I Zn-AI Cu-1 S-I SS-1 N03-N NIh-N Na ORG 5.53 0.0 6.2 13.0 5.4 3. 12 12 8.0 4.0 4 38 63 9 15 3 0.1 Field information App lied Lime Recommendations Sample No. Last Crop MO Yr T/A Crop or Year Lime N R05 ICO Mg Cit Zn B Mn See Note 28HRP Pine,E 1st Crop: Pine,E 23T 0.0 50-70 50-70 $ $ 0 11 2nd Cro : Test Results Soil Class HM% W/V CEC BS% Ac pH P-1 K-I Ca% Mg% Mn-I Mn-AI (1)Mn-AI (2) Zn-1 . Zn-AI Cu-1 S-1 SS-1 N($-N N115-N Na M-0 +44 1.12 5.1 10.0 4.6 3. 9 7 5.0 4.0 2 55 69 8 M 11 0.1 FteldInformatlon ' lied:Lime Recommendations - - - Sample No. Last Crop Ho Yr T/A Crop or Year Lime N R05 KO Mg Cu Zn B Mn See Note 06HRS Pine,E 1st Crop: Pine,E iAT 0.0 40-60 30-50 $ $ 0 11 2nd Cro : 'Pest Results Soil Class IIM% W/V CEC BS% Ac PH P-I K-I Ca% Mg% Mn-I Mn-AI (1) Mn-AI (2) Zn-1 Zn-AI Cu-I S-I• SS-I NQ3-N NII-N Na MIN 1.94 1.00 3.7 24.0 2.8 4.4 12 19 16.0 5.0 3 35 35 9 37 2 0.1 NCDA Agronomic Division 4300 Reed Creek Road; Ralc h, NC 27607-6465 (919) 733-2655 Grower; NCDOT - RI:1l Report No 34626 P 5 Field Information Applied Lime Recommendations - Sample No last Crop o Yr T/A C Y . rop or ear Lime N R05 Ko Mg Cu Zn B Mn See Note 28 Pine,C 1st Crop: Pine,C 0 0.0 30-50 40-60 $ $ 0 11 2nd Cro : Test Results Soil Class IIM% IVIV CEC BA' Ac pH P-1 K-1 Ca% Mg% Mja-I Mn-AI (1)Mn-AI (2) Zn-I Zn-AI Cu-I S-I SS-1 NOj-N NIA-N Na M-0 3.98 1.04 4.8 65.0 1.7 5.6 16 12 58.0 5.0 4 41 51 8 33 11 0.1 NCWRC,HCP,FALLS LAKE TEL:919-528-9839 Jun 26'97 8:53 No.002 P.02 -- -0 Norffi Cataluna W 'fe Resources Commission 10 512 N. Salisbury Street, Raleigh, North Carolina 276044188, 919-733_3391 - - Chades R. Fullwood, Executive Director MEMORANDUM TO: Scott McLendon, U. S. Army Corps of Engineers Wilmington Field Office FROM: David Cox, Highway Project Coordinator Habitat Conservation Program' DATE: June 10, 1997 SUBJECT: Comments on the wetland mitigation plan for the Haws Run Site in Ponder County, North Carolina. Staff biologists with the N., C. Wildlife Resources Commission have reviewed the subject mitigation plan and have the following commcnta, Our comments are provided in accordance with certain provisions of the Fish and Wildlife Coordination Act (48 Stat. 401, as amended; 16 U.S.C. 661-667d). Our comments and questions are as follows. 1. We did not find a water budget in the mitigation plan. We assume that the savanna habitat is rainfall driven and if so, is thare'a treed to install low berms across the site to better distribute surface water. 2. Is there a clay lens that underlies the site and if so, has the extensive agriculture punctured this barrier? 3. The plan states that Lanier Quarry Savanna is the basis for plant community restoration. However, little information on the Lanier Quarry Savanna is included in the document. We request that the Lanier Quarry site be the Reference Ecosystem for the Haws Run restoration unless another site can be identified, The vegetative and NCWRC,HCP,FALLS LAKE TEL:919-528-9839 Jun 26'97 8:53 No.002 P.03 f ? 2 June 10, 1997 Ivlemo the hydrologic success criteria should be based on the existing conditions in the reference ecosystem. 4. Vegetation management is key to the health of savanna vegetation. Since fire is 80 integral part of these communities, we would expect any mitigation and long term management plan to use prescribed burns control herbaceous competition. 5. If a seed source for savanna vegetation remains adjacent to the dry savanna enhancement area, we reconuaend that the area be allowed to revegetatc naturally and use prescribed burns to control nuisance species such as Loblolly pine. 6. Since the site was extensively limed, i® the soil chemistry suitable for the restoration of savanna vegetation? Although the soil was analyzed, no information was provided regarding the nwd for site preparation. Thank you for the opportunity to comment on this mitigation plan. If we can be of any further assistance please contact me at (919) 528-9886. cc: David Shillcr, planning and Environmental-Branch, NCDOT Cyndi Bell, DWQ, Raleigh U.S. Fish and Wildlife Service, Raleigh d nN O (p O' "? O 0 d C7 n ".3 ` n' C 'C" ? y cnc o ? ?+? o ?-s ? o o °' 5• 0 -% > o n a.. p o wo no (ND p ?+.. ~ p" C ?D n o O ai C O (?D O O ?G Oq O A? ?c Q S Z C O ((D ^"+ ro 'C3 e' w Oro p n O ('D 01 CD ? N•r: ? ai. ?r • Z Cm b y CD roC ro Ax rC CD 0. 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Co TQ ORC as rro O a'?yro? O z)? f0 O - 0 C'? (ro? ? ro Rye r/? 0. m as w niv' O rSR m CD ee' sr 0 0 -= r-L 0 CO ?n ?s ?s' vi o m . p lRD .??„°.s R I .?CC(np R?. CU4 ? =ro (S ° O' „"3 p C C G O m ?'" vCI iFp n C?.0 :? ?3 G `"'roG ?? G C.C?Rp fy e* O 07 Cn Sa O ` m ?' F cDaoem.1 a )OW CD (ep? n CD CD Ei o 2 p, ° °° er "' m Fi'io?7r 'ClCDD4?C. C'LSro?sa. ?Sro7?c ?' °roa.o+' ro?nr- Ir dNS.51'A}p o-, STATE OF NORTH CAROLINA DEPARTMENT OF TPANSPORTATION JAMES B. HUNT JR. GOVERNOR MEMO TO: Mr. Eric Galamb DIVISION OF HIGHWAYS GARLAND B. GARRETT JR. P.O. BOX 25201, RALEIGH, N.C. 27611-5201 SECRETARY March 6, 1997 FROM: David Schiller D&V4- SUBJECT: Haws Run Mitigation Plan Please review this draft of the Haws Run Mitigation Plan. I realize that there are several typo's and small errors, but the overall plan is pretty much what NCDOT will submit in final form. The important point to note is that the southern end of the site will be developed in Phase II. This is the southern end of the site, where Cooley's Meadowrue is located. We would proceed with development of that end of the site only after close coordination with USFWS and Richard LeBlond of NHP. Incidentally, I'm enclosing a copy of an article that was in last Sunday's N&O, in case you missed it. Although the exact location is not identified, the site is Haws Run. I realize this is a late request, but I would appreciate your prompt review and comments. Give me a call at 733-7844, Extension 280 if you have any questions. ?r DEPARTMENT OF THE ARMY WILMINGTON DISTRICT, CORPS OF ENGINEERS P.O. BOX 1890 WILMINGTON, NORTH CAROLINA 28402-1890 July 16, 1997 IN REPLY REFER TO Regulatory Branch Action ID No. 199706104, Haws Run Mitigation Plan Mr. Frank Vick Planning and Environmental Branch Division of Highways NC Department of Transportation Post Office Box 25201 Raleigh, North Carolina 27611-5201 Dear Mr. Vick: LV/ Fiy?/RQNM1 Reference your letter dated April 28, 1997, requesting comments on the Haws Run Mitigation Plan. By copy of letter dated May 21, 1997, we requested that interested state and Federal resource agencies provide comments regarding the technical merits of this plan no later than June 13, 1997. It is our understanding that the North Carolina Department of Transportation (NCDOT) proposes to develop Haws Run as a multi-project mitigation site. By developing the site in this manner, we will evaluate the merits of an individual mitigation proposal independent of how the overall site may eventually be developed. As a general comment, we feel that the goals and objectives and specific success criteria were not clearly stated in the mitigation plan. This component of a plan is essential in the evaluation of the success or failure of a particular mitigation site. Overall, we feel that the site has merit as providing compensatory mitigation for swamp forest impacts relative to the causeways and canals that extend north and south of the property into Sandy Run Creek and Shelter Swamp Creek. However, due to the extensive amount of disturbance that has occurred in the proposed savannah restoration and enhancement area, use of this portion of the site for compensatory mitigation will be limited until such time that specific success criteria can be demonstrated. The following comments address these issues in greater detail: a. Page 6. Section 1.3; Plant Community Types. Specific information regarding dominant herbaceous species in the "interior" portions of the site should be provided. b. Page 11, Section 3.1.1.2, Plant Community Restoration. The plan should contain a specific description of the plant community in adjacent swamp forest to serve as a reference for proposed plant community restoration. C. Page 11, Section 3.1.1.2, Plant Community Restoration. Planting mixture #2 implies that the swamp forest restoration sites will have a slope built into the restored area. Is one proposed? -2- d. Page 11, Section 3.1.2 Swamp Forest Enhancement. A specific area of this site that has been utilized for a particular project should not be "reassessed" at a later date to determine if additional enhancement mitigation is appropriate. e. Page 11, Section 3.1.2, Swamp Forest Enhancement. What specific data or information will be collected to demonstrate that the hydrological "integrity " of the area isolated by the logging road will be enhanced? f. Page 12, Section 3.2. Savannah Mitigation. Wet pine savannahs also function to store water over the short and long term and may moderate groundwater discharge into Sandy Run Creek and Shelter Swamp Creek. g. Page 12, Section 3.2. Savannah Mitigation. Is the definition by "Taggard" as referenced in the plan the goal of the savannah restoration? h. Page 12, Section 3.2.1.1 Hydrological Restoration. Was any information regarding the occurrence of "B" horizons determined. We are concerned that the amount of subsoiling that has apparently occurred on this site may have greatly compromised the site's hydrological "integrity". i. Page 12, Section 3.2.1.1 Hydrological Restoration. Was a water budget prepared for this site? On what basis have you determined that 81 acres of this site will meet the hydrologic criteria for wetlands if the central canal is filled? j. Page 12, Section 3.2.1.1 Hydrological Restoration and Figure 8. If the central canal has resulted in the drainage of interior portions of the site, why are the remaining wetlands centered about the axis of the canal? k. Page 13, Section 3.2.1.2, Plant Community Restoration. This section is vague. Regarding wet savannah grasses, the plan indicates that reestablishment will be "attempted". We infer this to mean that if the plantings fail that further attempts at establishment will not be made. Where and how many of the plants will be planted? 1. Page 13, Section 3.2.1.2, Plant Community Restoration. The plan states that the herbaceous and shrub layers of the savannah community are "largely in place", yet no information is provided regarding what species currently populate the area. M. Page 13, Section 3.2.1.2, Plant Community Restoration. Reference sites should be included in this section. n. Page 13, Section 3.2.2 Wet savannah Enhancement. You should define what is meant by the term "A typical plant community". Also see comment "k" above. o. Page 14, Section 5.0, Monitoring Plan. Will the proposed wells also measure frequency and duration of inundation of the site? p. Page 14, Section 5.0, Monitoring Plan. The description of the success criteria is vague. "Similar" should be defined. q. Page 14, Section 5.2.1, Hydrologic Monitoring. Will the hydrologic success criteria for the savannah restoration will be tied to the hydrologic regime at the Lanier Quarry? -3- r. Page 15, Section 5.2.2 Plant Community Monitoring. We are concerned that the number of sample plots will not adequately characterize success (or failure) of the site. Your monitoring plan must reflect what is occurring on the site. S. Page 15, Section 5.2.2 Plant Community Monitoring. No mention of the monitoring of planted or volunteer herbaceous species is made. t. Page 13, Section 3.2.4, Dry Savannah Enhancement. The use of upland portions of the property for wetland mitigation may be suitable provided some justification and information is provided as to how these uplands contribute to the overall "functional integrity" of the site. Would you propose to include portions of the uplands in future mitigation proposals from this site? U. It is our understanding that the savannah ecotype described in the plan requires fire for growth and regeneration of several species of resident plants as well as for the control of noxious species. Will a fire management plan be included as part of the overall management of the site?. V. Individual mitigation parcels within the overall site will need to be physically located, that is, identified with a metes and bounds survey or Global Positioning System (GPS) location. We appreciate the opportunity to comment on this plan. I may be contacted at (910) 251-4725 should you have any questions or comments. Sincerely, Scott McLendon Regulatory Project Manager Copies Furnished: Mr. David Cox NC Wildlife Resources Commission 1142 I-85 Service Road Creedmoor, North Carolina 27522 Mr. John Dorney Division of Water Quality North Carolina Department of Environment, Health and Natural Resources 4401 Reedy Creek Road Raleigh, North Carolina 27611-7687 F y DEPARTMENT OF THE ARMY WILMINGTON DISTRICT, CORPS OF ENGINEERS P.O. BOX 1890 WILMINGTON, NORTH CAROLINA 28402-1890 IN REPLY REFER TO Regulatory Branch May 20, 1997 Action ID No. 199402926, Jacksonville Bypass, TIP R-2107 w Mr. Frank Vick Planning and Environmental Branch Division of Highways North Carolina Department of Transportation Post Office Box 25201 Raleigh, North Carolina 27611-5201 Dear Mr. Vick: Reference the Public Notice dated April 25, 1996, describing the proposal by the North Carolina Department of Transportation (NCDOT) to place fill material into approximately 33 acres of wetlands to construct the B, BA, and C sections of the Jacksonville Bypass, Jacksonville, onslow County, North Carolina. After review of your latest mitigation proposal, the National Marine Fisheries Service (NMFS), the United States Environmental Protection Agency (EPA), and the United States Fish and Wildlife Service (USFWS) by copy of letters dated April 28, 1997, April 25, 1997, and April 28, 1997, respectively, again recommended denial of your application (copies enclosed). These recommendations are due to the following deficiencies in the proposal: a. The Haws Run mitigation plan containing a description of Restoration Area 2 has not been reviewed by any of the agencies. b. Camp Lejeune cannot guarantee preservation of the Big Shakey Swamp and Pocosin areas at Greater Sandy Run. c. The "site analysis" for the coastal marsh mitigation site is deficient in detail regarding success criteria, monitoring requirements, and disposition of property. d. Stability of the marsh site relative to boat wakes should be addressed. In addition, we have reviewed the subject proposal and also offer the following additional comments: e. It appears the proposed coastal marsh mitigation site will adequately compensate for unavoidable coastal marsh and estuarine bottom impacts associated with this project. However, the "site analysis" is not a mitigation plan and will not be considered as such until the following -2- deficiencies have been corrected: 1. It is unclear if proposed elevations on the restored site and plant species targeted for establishment correspond to the reference marsh colonized with the same target species and at the same elevations. 2. A monitoring plan that includes the location of monitoring site(s) must be included in the final plan. 3. Success criteria for the site must be clearly stated. 4. It is unclear from figure 9 of the site analysis if adequate drainage will occur on the site after final grading. Development of "salt pans" on the site will inhibit germination and growth of desirable plant species. 5. As built plans will need to be provided to the Corps of Engineers and interested resource agencies. 6. Remediation measures relative to planting failure and erosion of the site must be described. f. A mitigation plan for the Haws Run Site will need to be reviewed and approved prior to utilizing any portion of this site for any project. 1. Restoration Area 2 will need to be physically located on the Haws Run site with a metes and bounds survey or Global Positioning System methods. g. The ultimate disposition of the Greater Sandy Run Mitigation area and assurances that the site will be preserved in perpetuity have not been resolved. The Corps of Engineers is not prepared to accept this mitigation proposal until these issues have been addressed. I am available to discuss these concerns with you and to assist in coordination with the agencies to resolve these objections. I may be contacted at (910) 251-4725. Sincerely, Scott McLendon Regulatory Project Manager Enclosures a -3- Copies Furnished (without enclosures): Mr. Larry Hardy National Marine Fisheries Service Pivers Island Beaufort, North Carolina 28516 Mr. Haynes Johnson, Acting Chief Wetlands Protection Section-Region IV Water Management Division U.S. Environmental Protection Agency Atlanta Federal Center 61 Forsyth Street Atlanta Georgia, 30303 Mr. John Dorney Division of Water Quality North Carolina Department of Environment, Health, and Natural Resources 4401 Reedy Creek Road Raleigh, North Carolina 27611 .w ?Eo ?a saw STATE OF NORTH CAROLINA DEPARTMENT OF TRANSPORTATION JAMES B. HUNT JR. P.O. BOX 25201, RALEIGH, N.C. 27611-5201 E. NORRIS TOLSON GOVERNOR SECRETARY Mr. Scott McLendon Wilmington Regulatory Field Office US Army Corps of Engineers Post Office Box 1890 Wilmington, NC 28402-1890 Dear Mr. McLendon: August 3, 1998 AUG _ 7 ,ggg x SUBJECT: Haws Run Mitigation Plan, Pender-Onslow Counties, Action ID No. 199706104 Your letter of July 1, 1998, expressed concern that the proposed wasting of fill material and associated road construction on the mitigation site would represent a major alteration to the approved mitigation plan. The wasted soil will be used to construct combination access roads/fire lanes around portions of.the site. These will have breaks or openings in them at various locations to allow for surface drainage while maintaining vehicular access for monitoring, fire protection, and other maintenance activities. It is my understanding that this issue was discussed with you at a meeting in Wilmington on July 30, 1998. I trust this matter was resolved to your satisfaction at that meeting. If you have any questions, please contact Mr. Phil Harris or Mr. David Schiller of my staff. They can be reached at (919) 733-7844, Extension 301 or 294, respectively. Sincerely, W. D. Gilmore, P.E., Manager Planning and Environmental Branch cc: Mr. David Cox (NCWRC) Mr. John Dorney (NCDWQ) Dr. V. Charles Bruton Mr. Phillip Harris, P.E. Mr. David H. Schiller