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HomeMy WebLinkAbout19970616 Ver 1_Mitigation Plans_19980325Wetland and Stream Mitigation Strategy for R-529 North Carolina Department of Transportation Division of Highways Planning and Environmental Branch Wetland Mitigation Section 25 March 1998 TABLE OF CONTENTS Pate Introduction 1 Sparta Bog Mitigation Site Description 1 Sparta Bog Mitigation Project Strategy 2 Phase 1. Preservation 2 Phase 2. Detailed Site Investigation 3 Phase 3. Mitigation Plan Development 3 Phase 4. Implementation 4 Phase 5. Monitoring 4 NCDOT/WRC Stream Mitigation Agreement 4 Summary 5 Figure 1 6 Figure 2 7 Introduction 00 This document summarizes the North Carolina Department of Transportation's (NCDOT) strategy for mitigating unavoidable impacts to streams and wetlands resulting from proposed improvements to US 421 between South Fork New River and Blue Ridge Parkway in Watauga County (R-529BA, BB, and BD). Unavoidable impacts identified for this project consist of 1.32 acres of wetland impacts and 5,636 linear feet of perennial stream impacts. Projected wetland impacts for R-529 occur at nine sites along the proposed alignment, ranging in size from 0.01 acres to 0.99 acres. The largest impacted wetland site (0.99 acres) is comprised primarily of a ground water seep, while the majority of other wetland impacts occur at small sites along the fringes of streams and tributaries. Projected impacts to surface waters occur at 26 sites. A sample of 21 of these sites were surveyed by NCDOT biologists in the summer of 1997 and evaluated for water quality and biodiversity. This study indicated that the majority of impacted streams are classified as Class C Trout Waters and have Good to Excellent water quality. The results of this study were reported in a document entitled "Stream Assessment Report, R- 529BA and BB", dated 15 August 1997, and distributed to the U.S. Army Corps of Engineers, the North Carolina Division of Water Quality, the North Carolina Wildlife Resources Commission, and the U.S. Fish and Wildlife Service. Proposed mitigation for R-529 is primarily the Sparta Bog mitigation site in Alleghany County, North Carolina. The Sparta Bog site was purchased by the NCDOT in November, 1997 to provide stream and wetland mitigation for impacts resulting from highway construction projects in the New River Basin. NCDOT proposes to provide mitigation for impacts resulting from R-529 and other future projects in the New River Basin through restoration, enhancement, and preservation activities conducted at the Sparta Bog mitigation site. The balance of the stream mitigation required for R-529 will be obtained through a contractual arrangement with the Wildlife Resources Commission. Sparta Bog Mitigation Site Description R0 The Sparta Bog is located in central Alleghany County, within the New River ? „Basin, approximately two miles west of Sparta, N.C., at the junction of NC 18 and SR ?J 1173 (Figure 1). It is considered to be a site of national significance by the North Carolina Natural Heritage Program and has been studied by the North Carolina Nature Conservancy as a candidate for acquisition. The NCDOT conducted an extensive OJ biological survey in August and September 1997 to document the existing conditions at the site. Existing wetlands were delineated and mapped, and potential site alterations .? were identified. The results of this survey were presented in a report dated 22 October 1997 entitled "Natural Resources Evaluation of the Sparta Bog Mitigation Site, Alleghany County, NC". This report was distributed to the Corps of Engineers, the Division of Water Quality, the Wildlife Resources Commission, the Fish and Wildlife Service, and other interested agencies in October, 1997. The Sparta Bog comprises 324 acres, of which about 26 acres are jurisdictional wetlands. Wetlands occur along seepage slopes and in a narrow bottomland associated with an unnamed perennial stream (Figure 2). These wetlands have been classified as Southern Appalachian Bog, Northern Subtype according to the North Carolina Natural Heritage Program's community classification system, and have been assigned a rarity rank of G1 S 1. This indicates extreme rarity for this community type. Forested uplands of the property are comprised of Chestnut Oak Forest or Mesic Mixed Hardwood Forest. Wetland communities at the Sparta Bog site support populations of rare flora and fauna, including the southern bog turtle and 15 species of state listed plants. Human disturbances which have impacted hydrology, soils, and vegetation include: ditching of small wetland bogs and seeps; channelization of segments of the perennial stream; installation of subsurface drainage structures; grazing of cattle in the wetlands; ranging of cattle within the stream channel; and mowing portions of the bog for forage. Sparta Bog Mitigation Project Strategy Development of the Sparta Bog for wetland and stream mitigation will be conducted in five phases. Due to the sensitive nature of the site, the rarity of the community type, and the occurrence of significant populations of rare species, the NCDOT has been advised by the regulatory agencies that actions should not be undertaken until a more thorough understanding of the site and its dynamics is available. This conservative strategy is needed to make sure that DOT mitigation activities do not disrupt the existing biological features of the site, and to increase the probability of achieving successful mitigation. Development of the phased approach has been coordinated with various natural resource agencies, including the Corps of Engineers, the Division of Water Quality, the Wildlife Resources Commission, and the N.C. Museum of Natural History, at an on-site meeting in December, 1997. Plans for additional site investigation were discussed, as well as potential restoration and enhancement options. Based on the recommendations of this meeting, NCDOT has developed a strategy for study and implementation. Phase 1. Preservation In November 1997, following extensive coordination with the Wildlife Resources Commission, the Sparta Bog site was purchased by NCDOT and consequently protected from potential development. At the time of purchase, the property was under imminent threat from residential development. The property had been on the market for several years, and the owners had received offers to subdivide and develop the upland portions of the property. Such development would undoubtedly have resulted in significant alteration of the watershed characteristics; the water quality would have declined, and the hydrology for the bog would have become less stable due to increased runoff and sedimentation. Purchase of the property by NCDOT has ensured protection from such development and has preserved the existing hydrologic conditions, in addition to providing a sizable upland buffer for wildlife habitat. 2 Phase 2. Detailed Site Investiization Extensive natural resource investigations will be conducted at the Sparta Bog site throughout the summer growing season of 1998. These studies will supplement the previously published Natural Resources Evaluation to provide more detailed and comprehensive data. As discussed in detail at an on-site meeting in December 1997, investigations will include hydrologic studies, water quality measurements, and detailed soil and flora mapping. Groundwater hydrology monitoring wells will be installed in April 1998 to record changes in groundwater through the growing season and to measure the sensitivity of groundwater levels to local precipitation. Water quality analyses will conducted, consisting of a series of water quality samples and measurements to determine pH, nitrogen concentration, and the concentration of various metals. Surveys for rare plants will be conducted during three periods in the 1998 growing season to facilitate the identification of species when they are in flower. Surveys for bog turtles and preferred bog turtle habitat will also be conducted. Floral surveys, along with soils, topographic, and hydrologic data will be used to develop a detailed site map identifying microhabitats within the overall bog system. The objective of these studies is to enhance the probability of successful hydrologic restoration and to ensure that proposed management activities do not harm existing rare flora and fauna. Completion of this phase of data collection is scheduled for October 1998. Phase 3. Mitigation Plan Development After the completion of Phase 2, all available data and site mapping will be synthesized into a mitigation plan for the Sparta Bog site. Preliminary reviews of the site have identified several opportunities for wetland mitigation and stream restoration which will be evaluated based on the availability of new data. DOT will pursue any combination of activities that will promote the long term restoration of the Sparta Bog wetlands and the protection of existing rare species. Potential wetland restoration and enhancement activities under consideration include: 1) Backfilling or blocking of ditches draining portions of the bog and removal of ditch spoil. (Site investigations by NCDOT biologists revealed the presence of hydric soils which currently show no evidence of wetland hydrology. Such areas may be restorable if drainage is removed.) 2) Removal of subsurface drainage structures. 3) Reforestation of upland areas within the watershed which are currently in agriculture. (Such areas could be left open as fields for wildlife habitat if it is determined by WRC to be preferable.) Potential stream restoration and enhancement activities under consideration include: 1) Reestablishment of natural stream meanders in approximately 2000 ft. of stream segments which have been channelized. (This assumes such activities can be accomplished without significant harm to adjacent wetlands and endangered plants and animals on site.) 2) In-stream habitat restoration and enhancement within the existing channel in channelized stream segments. (Note: A determination will be made between options 1 and 2 regarding which is most appropriate) 3) Enhancement and stabilization of existing stream banks and channel in approximately 1500 ft. of unchannelized stream. 4) Exclusion of cattle within the stream channel to protect water quality and eliminate stream degradation. Phase 4. Implementation It is the intent of DOT to begin implementation of mitigation activities at the Sparta Bog site no later than the fall of 1999, after the completion of the site investigation in Phase 2 and the approval of the mitigation plan in Phase 3. Implementation may be scheduled in phases if recommended by the regulatory agencies. _ Phase 5. Monitoring DOT will monitor the status of hydrology, vegetation, and rare flora and fauna throughout the implementation phase and for five years following the completion of all implementation activities. Once all implementation and monitoring activities are complete, ownership of the property will be transferred to another state agency with land management responsibilities. J° NCDOT/WRC Stream Mitigation Agreement ` V_ The DOT is entering into a formal agreement with the Wildlife Resources Commission to perform stream mitigation in the New River Basin, patterned after the agreement for TIP No. A-10 in Madison County. This mitigation agreement will provide 11 stream mitigation required for R-529 that cannot be provided at the Sparta Bog mitigation site. The agreement is based on providing mitigation at a 2:1 ratio for the 5636 linear feet of project impacts. Typical mitigation measures may include but are not limited to, stream bank stabilization and/or revegetation, installation of fish habitat `I structures, fish stocking, fencing livestock out of the stream, or constructing managed livestock watering facilities.' The WRC will conduct a search within the New River Basin, particularly in Watauga County, to identify stream segments requiring restoration. The WRC will be responsible for developing a mitigation plan for these stream segments. The plan will be 4 reviewed by the Corps of Engineers and the Division of Water Quality. WRC will be responsible for meeting the established success criteria of the mitigation plan. The agreement includes provisions for maintenance and monitoring. NCDOT will provide funding for the mitigation activities on a linear foot basis, will acquire the necessary conservation easements, and will also be responsible for maintenance costs for five years. This agreement has been submitted to the WRC for their review. Summary The Sparta Bog mitigation site is being offered as mitigation for unavoidable impacts to streams and wetlands associated with R-529 and other future projects in the New River watershed. Although the Sparta Bog site will not by itself provide sufficient stream mitigation for R-529, it should provide mitigation for some stream impacts and all wetland impacts associated with this highway project. Additional stream mitigation required to compensate for impacts of R-529 will be addressed through a cooperative agreement with the Wildlife Resources Commission. ?c '?-°2{'ff1 •8 - '358 1339 1117 New Be-... •I -,ylXf \ s °Mrey',,.I S!.9?M ?•ai: _••_ _..? 1 't•.'J?``,?°'.601 'a0] -P?easael - 0m - :4t . 0. eee [v 1105 1 1C9 . W 1606 ]?.. Cn. -1 BALD KNOB 1.37 Lm 315 yy ` ? 14C3 1115 1612 ` N .4 j 1436 e T _ 1.0 `,? a I11 . > \\` l .° •O `"a°a ? DOUGHiON ?2 'n:5 1415 . J u '7 '?. !31] \368 '1C5 MIN. ",`.*/ ',0 \636 q ?' h I \93 P '._. 0 ih: tm t<?<?1t•?T 5 61n.>4- ?? ]13.9 •? a3.$ 't, "((?? Ie .a>• 'd Gs? _ /. 2` -a5 5 u `.. anGn 2 .B ?14311 ('I! ; aev , ? 1 / 1 695 `` 9 S ?' y, h.+ 3.9 y Imzi 7G1$-. i65 n... a+? . V 1.-•-?y 22 n -?, ? 1426 ??i 66 35 ?' _ _ \v< > 91 167 1163 7 r e 1 ro POP. 1,975 trove Ch. 142_ \ \ lag] 3 1167 0?=? \ 1135 {\, • ` ,?. ?Ibe? ? 221 t 169 ,? 1163 ,? 1-? \(i' I _ \ _ ' 9.629 1422 1.0 .6 1169\ ?-? _J 1,9 '). FENDER MTN. Ch. ?•6 1163 'In SPARTA BOG MITIGATION SITE 1 \ CHEEK MTN. 152 Prather Cr... Cn. _ _21 _-. 9, ?01 ,51 6 LIZ -23 L= 131 _ 23 _ MTV. l -'-2 1 :V- P 2.2 21 2 I 7 Ilal,'ti !193 ?S .s4 _ Pfd' - ,I' % < e..e gip. ?C, .Z 3.c d i q?p, f?? I PARKWAY - Air Belle's c•?; _2-2 _ 30 vrx. ' DOUGKrON PARK \ =3 i RECILEATIONAL AREA i I °F MORTh C?9 NORTH CAROLINA DEPARTMENT OF yet °G9. TRANSPORTATION ° 0 DIVISION OF HIGHWAYS ° r \y 4r, F'Z? _-Aµs?°p PLANNING & ENVIRONMENTAL BRANCH SPARTA BOG MITIGATION SITE ALLEGHANY COUNTY VICINITY MAP FIGURE 1 6 Sparta'' tilt ?coo-- X? 200 3501 29 0 SPARTA BOG MITIGATION SITE, 300 ? 1 `? E \ YY\\? i 1 \\\ W 3000 \ ?` 1 0 ??? 1\\?\ ,,1\\\ !,? 300 =-??'? ?• y /-=i "??`'\ . :.?? \ \??= •U 3000 ?`' `_,?•" 4?oF NO"7 Cygo NORTH CAROLINA DEPARTMENT OF \ TRANSPORTATION j - \\• IOm? _' DIVISION OF HIGHWAYS (/ o i ehead_ _^I s e. •' ! \FOFPLANNING & ENVIRONMENTAL BRANCH /?tCh n ems \? 1 , SPARTA BOG MITIGATION SITE ALLEGHANY COUNTY APPROXIMATE PROPERTY BOUNDARY WHITEHEAD, NC QUAD FIGURE 2 7 CtIOZ We tland and Stream Mitigation Strategy for-US 421 from South Fork New River to Blue Ridge Parkway R529 BA, BB, BD North Carolina Department of Transportation Division of Highways Planning and Environmental Branch Wetland Mitigation Section 27 March 1998 TABLE OF CONTENTS Introduction Sparta Bog Mitigation Site Description Sparta Bog Mitigation Project Strategy Phase 1. Preservation Phase 2. Detailed Site Investigation Phase 3. Mitigation Plan Development Phase 4. Implementation Phase 5. Monitoring NCDOT/WRC Stream Mitigation Agreement Summary Figure 1 Figure 2 Appendix A Page 1 2 2 3 3 4 4 5 5 6 7 A previous version of this document was presented to the North Carolina Division of Water Quality (DWQ) at a meeting held March 25, 1998. This revised version incorporates additional detail requested by the DWQ at that meeting. Introduction This document summarizes the North Carolina Department of Transportation's (NCDOT) strategy for mitigating unavoidable impacts to streams and wetlands resulting from proposed improvements to US 421 between South Fork New River and Blue Ridge Parkway in Watauga County (R-529BA, BB, and BD). Unavoidable impacts identified for this project consist of 1.32 acres of wetland impacts and 5,636 linear feet of perennial stream impacts. Projected wetland impacts for R-529 occur at nine sites along the proposed alignment, ranging in size from 0.01 acres to 0.99 acres. The largest impacted wetland site (0.99 acres) is comprised primarily of a ground water seep, while the majority of other wetland impacts occur at small sites along the fringes of streams and tributaries. Projected impacts to surface waters occur at 26 sites. A sample of 21 of these sites were surveyed by NCDOT biologists in the summer of 1997 and evaluated for water quality and biodiversity. This study indicated that the majority of impacted streams are classified as Class C Trout Waters and have Good to Excellent water quality. The results of this study were reported in a document entitled "Stream Assessment Report, R- 529BA and BB", dated 15 August 1997, and distributed to the U.S. Army Corps of Engineers, the North Carolina Division of Water Quality, the North Carolina Wildlife Resources Commission, and the U.S. Fish and Wildlife Service. Proposed mitigation for R-529 is primarily the Sparta Bog mitigation site in Alleghany County, North Carolina. The Sparta Bog site was purchased by the NCDOT in November, 1997 to provide stream and wetland mitigation for impacts resulting from highway construction projects in the New River Basin. NCDOT proposes to provide mitigation for impacts resulting from R-529 and other future projects in the New River Basin through restoration, enhancement, and preservation activities conducted at the Sparta Bog mitigation site. The balance of the stream mitigation required for R-529 will be obtained through a contractual arrangement with the Wildlife Resources Commission. Sparta Bog Mitigation Site Description The Sparta Bog is located in central Alleghany County, within the New River Basin, approximately two miles west of Sparta, N.C., at the junction of NC 18 and SR 1173 (Figure 1). It is considered to be a site of national significance by the North Carolina Natural Heritage Program and has been studied by the North Carolina Nature Conservancy as a candidate for acquisition. The NCDOT conducted an extensive biological survey in August and September 1997 to document the existing conditions at the site. Existing wetlands were delineated and mapped, and potential site alterations were identified. The results of this survey were presented in a report dated 22 October 1997 entitled "Natural Resources Evaluation of the Sparta Bog Mitigation Site, Alleghany County, NC". This report was distributed to the Corps of Engineers, the Division of Water Quality, the Wildlife Resources Commission, the Fish and Wildlife Service, and other interested agencies in October, 1997. The Sparta Bog comprises 324 acres, of which about 26 acres are jurisdictional wetlands. Wetlands occur along seepage slopes and in a narrow bottomland associated with an unnamed perennial stream (Figure 2). These wetlands have been classified as Southern Appalachian Bog, Northern Subtype according to the North Carolina Natural Heritage Program's community classification system, and have been assigned a rarity rank of G 1 S 1. This indicates extreme rarity for this community type. Forested uplands of the property are comprised of Chestnut Oak Forest or Mesic Mixed Hardwood Forest. Wetland communities at the Sparta Bog site support populations of rare flora and fauna, including the southern bog turtle and 15 species of state listed plants. Human disturbances which have impacted hydrology, soils, and vegetation include: ditching of small wetland bogs and seeps; channelization of segments of the perennial stream; installation of subsurface drainage structures; grazing of cattle in the wetlands; ranging of cattle within the stream channel; and mowing portions of the bog for forage. Sparta Bog Mitigation Project Strategy Development of the Sparta Bog for wetland and stream mitigation will be conducted in five phases. Due to the sensitive nature of the site, the rarity of the community type, and the occurrence of significant populations of rare species, the NCDOT has been advised by the regulatory agencies that actions should not be undertaken until a more thorough understanding of the site and its dynamics is available. This conservative strategy is needed to make sure that NCDOT mitigation activities do not disrupt the existing biological features of the site, and to increase the probability of achieving successful mitigation. Development of the phased approach has been coordinated with various natural resource agencies, including the Corps of Engineers, the Division of Water Quality, the Wildlife Resources Commission, and the N.C. Museum of Natural History, at an on-site meeting in December, 1997. Plans for additional site investigation were discussed, as well as potential restoration and enhancement options. Based on the recommendations of this meeting, NCDOT has developed a strategy for study and implementation. Phase 1. Preservation In November 1997, following extensive coordination with the Wildlife Resources Commission, the Sparta Bog site was purchased by NCDOT and consequently protected from potential development. At the time of purchase, the property was under imminent threat from residential development. The property had been on the market for several years, and the owners had received offers to subdivide and develop the upland portions of the property. Such development would undoubtedly have resulted in significant alteration of the watershed characteristics; the water quality would have declined, and the hydrology for the bog would have become less stable due to increased runoff and sedimentation. Purchase of the property by NCDOT has ensured protection from such development and has preserved the existing hydrologic conditions, in addition to providing a sizable upland buffer for wildlife habitat. 2 Phase 2. Detailed Site Investigation Extensive natural resource investigations will be conducted at the Sparta Bog site throughout the summer growing season of 1998. These studies will supplement the previously published Natural Resources Evaluation to provide more detailed and comprehensive data. As discussed in detail at an on-site meeting in December 1997, investigations will include hydrologic studies, water quality measurements, and detailed soil and flora mapping. Groundwater hydrology monitoring wells will be installed in April 1998 to record changes in groundwater through the growing season and to measure the sensitivity of groundwater levels to local precipitation. Water quality analyses will conducted, consisting of a series of water quality samples and measurements to determine pH, nitrogen concentration, and the concentration of various metals. Surveys for rare plants will be conducted during three periods in the 1998 growing season to facilitate the identification of species when they are in flower. Surveys for bog turtles and preferred bog turtle habitat will also be conducted. Floral surveys, along with soils, topographic, and hydrologic data will be used to develop a detailed site map identifying microhabitats within the overall bog system. The objective of these studies is to enhance the probability of successful hydrologic restoration and to ensure that proposed management activities do not harm existing rare flora and fauna. Completion of this phase of data collection is scheduled for October 1998. Phase 3. Mitigation Plan Development After the completion of Phase 2, all available data and site mapping will be synthesized into a mitigation plan for the Sparta Bog site. Preliminary reviews of the site have identified several opportunities for wetland mitigation and stream restoration which will be evaluated based on the availability of new data. NCDOT will pursue any combination of activities that will promote the long term restoration of the Sparta Bog wetlands and the protection of existing rare species. Potential wetland restoration and enhancement activities under consideration include: 1) Backfilling or blocking of ditches draining portions of the bog and removal of ditch spoil. (Site investigations by NCDOT biologists revealed the presence of hydric soils which currently show no evidence of wetland hydrology. Such areas may be restorable if drainage is removed.) 2) Removal of subsurface drainage structures. 3) Reforestation of upland areas within the watershed which are currently in agriculture. (Such areas could be left open as fields for wildlife habitat if it is determined by WRC to be preferable.) 3 Potential stream restoration and enhancement activities under consideration include: 1) Reestablishment of natural stream meanders in approximately 2000 ft. of stream segments which have been channelized. (This assumes such activities can be accomplished without significant harm to adjacent wetlands and endangered plants and animals on site.) 2) In-stream habitat restoration and enhancement within the existing channel in channelized stream segments. (Note: A determination will be made between options I and 2 regarding which is most appropriate) 3) Enhancement and stabilization of existing stream banks and channel in approximately 1500 ft. of unchannelized stream. 4) Exclusion of cattle within the stream channel to protect water quality and eliminate stream degradation. Phase 4. Implementation It is the intent of NCDOT to begin implementation of mitigation activities at the Sparta Bog site no later than the Fall of 1999, after the completion of the site investigation in Phase 2 and the approval of the mitigation plan in Phase 3. Implementation may be scheduled in stages if recommended by the regulatory agencies, in which case restoration and enhancement activities (including planting) should be complete by Spring 2001. Phase 5. Monitoring NCDOT will monitor the status of hydrology, vegetation, and rare flora and fauna prior to construction as part of the planning phase; throughout the implementation phase; and for five years following the completion of all implementation activities. Once all implementation and monitoring activities are complete in 2005 or 2006, ownership of the property will be transferred to another state agency with land management responsibilities. The Wildlife Resources Commission has expressed an interest in accepting maintenance and management responsibilities for the site. It is understood that the dates indicated in Phase 4 and Phase 5 are contingent upon the schedule approved in the mitigation plan, and are subject to change with the approval of the regulatory agencies. The state Wetland Restoration Program has agreed to collaborate with the NCDOT during Phase 2 and Phase 3 , especially in the development of proposed scopes of work and the review of technical reports. NCDOT/WRC Stream Mitigation Agreement The NCDOT is entering into a formal agreement with the Wildlife Resources Commission to perform stream mitigation in the New River Basin, patterned after the agreement for TIP No. A-10 in Madison County. This mitigation agreement will provide all stream mitigation required for R-529 that cannot be provided at the Sparta Bog mitigation site. The agreement is based on providing mitigation at a 2:1 ratio for the 5636 linear feet of project impacts. Typical mitigation measures may include, but are not limited to, stream bank stabilization and/or revegetation, installation of fish habitat structures, fish stocking, fencing livestock out of the stream, or constructing managed livestock watering facilities. A copy of the agreement to be executed between the NCDOT and WRC is in Appendix A. This agreement has been submitted to the WRC for execution. The WRC will conduct a search within the New River Basin; particularly in Watauga County, to identify stream segments requiring restoration. The WRC will be responsible for developing a mitigation plan for these stream segments. The plan will be reviewed by the Corps of Engineers and the Division of Water Quality. WRC will be responsible for meeting the established success criteria of the mitigation plan. The agreement includes provisions for maintenance and monitoring. NCDOT will provide funding for the mitigation activities on a linear foot basis, will acquire the necessary conservation easements, and will also be responsible for maintenance costs for five years. Summary The Sparta Bog mitigation site is being offered as mitigation for unavoidable impacts to streams and wetlands associated with R-529 and other future projects in the New River watershed. Although the Sparta Bog site will not by itself provide sufficient stream mitigation for R-529, it should provide mitigation for some stream impacts and all wetland impacts associated with this highway project. Additional stream mitigation required to compensate for impacts of R-529 will be addressed through a cooperative agreement with the Wildlife Resources Commission. 5 I? 3 iaS? '.3,, LS 2, 1 LIMA o •2 ?Fa '. N 1.05 y 1-7 I4C9 °Ch. .yr aI ._ / .e ?y\\ fil?ER r.I 3 0/ 3 ` I BALD KNOB 1137 3 _ a? 113 alt 1 v ?. lye 3.5 j '136 0 \ l' '., OOUCHTON per, IaiS 7 ` •N '.317 \s Sae 4p5 MTN. J.' •? \s36 a O• a 1 > r, odor ?' ?W - 9? 1 93 awl a ??u ?.7 ..? ]13x9 0- ? •Q, :?? ? ?t' r- _ _ J a6 S ^ OhGh r . a ? • ,1 a9S T y?2 '• 131 j 19 152 ! 7 G Vr ! I6.5 T.n Oati -Am 2baw 5 211 56 167 P01. 1,975 'a crop.o ch. ,29 ,y . az9 azz 1163 y .. o .N ;??? - ?o . ?•--?? _ aze s V 9 3 C, 3- a '6 LI (ENDER M7N. ?' 'aJ2 SPARTA BOG MITIGATION SITE - (?/ j n fit \ CHEEK MTN. r 26 ,.S Pro-.r Crs ?? 9 ° i 6 i?' led \J ..93 ? ??. _ __-e57 nF -37 - ' 1 r y ?5 9UL M IISO (ie) _aC y-3 2 23 NTV. .3 1_21 2 `_y71:1A ?' '2 _ Taff .7 .49 U• / } '-"%? Arne PARKWAY lag ?;? '_93 / ?- j?• Air Bellaes n'•r -i-_ may: / p _ GcO ' b ?. -orZ:- 171. 2. e DOUGHTON PARK \ _ 3 i KECREATIONAL AREA tkORTH , NORTH CAROLINA DEPARTMENT OF ?? TRANSPORTATION DIVISION OF HIGHWAYS PLANNING & ENVIRONMENTAL BRANCH SPARTA BOG MITIGATION SITE ALLEGHANY COUNTY VICINITY MAP FIGURE 1 6 ta' r 1? ? • 32?\?; ,? R r`{ E ^ ? /' 3000 1 zuv ('" ; \ X3501 ;I%? 29 3000 ^ . SPARTA BOG MITIGATION SITE } 1 ( C) If % f, cl coo 1930 \ \ \??\ \?\\ \ 300 ° 3000 -? NORTH CAROLINA DEPARTMENT OF AOGs TRANSPORTATION \ `r+J ??y?j ?? J/1 ?-?'L • . -Gem --}' _- \\ ? iy ?. - \\• m z' DIVISION OF HIGHWAYS i ehead- .? ?_. • ?i " ?17 J?,NSa'0PPLANNING 8 ENVIRONMENTAL BRANCH ? _?' Un n \ i t SPARTA BOG MITIGATION SITE ALLEGHANY COUNTY ems \ APPROXIMATE PROPERTY BOUNDARY WHITEHEAD, NC QUAD FIGURE 2 7 NORTH CAROLINA W ATAUGA COUNTY NORTH CAROLINA DEPARTMENT OF TR kNSPORTATION REIMBURSEMENT AGREEMENT AND PROJECT: R-529BA, BB, & BD NORTH CAROLINA WILDLIFE RESOURCES COMMISSION THIS AGREEMENT, made and entered into this the day of , 1998, between the DEPARTMENT OF TRANSPORTATION, an agency of the State of' North Carolina, hereinafter referred to as DOT, and the NORTH CAROLINA WILDLIFE RESOURCES COMMISSION, hereinafter referred to as WRC; WHEREAS, DOT has prepared and adopted plans to make certain highway constructions and improvements under Project R-529BA, BB, and BD, Watauga County, said plan consisting of the construction of US 421 from South Fork New River to the Blue Ridge Parkway at Deep Gap; and WHEREAS, the U. S. Army Corps of Engineers, hereinafter referred to as COE, and other resource agencies have expressed concern regarding the expected primary and secondary impacts on streams and tributaries due to channel relocations and culvert installations associated with the construction of said Project; and, WHEREAS, DOT has acquired a site in Alleghany County to perform wetland and stream mitigation activities, and this site is under study to develop a detailed mitigation plan; and, WHERAS, DOT has agreed to perform certain stream enhancement mitigation at a 2:1 ratio to address these concerns and meet the permitting requirements for the construction of Project R-529BA, BB, and BD; and, WHEREAS, DOT has requested WRC to undertake the planning and implementation of the agreed to off-site stream enhancement mitigation that cannot be provided at the Alleghany County site; and, WHEREAS, WRC has agreed to perform said mitigation subject to the conditions hereinafter set forth. NOW, THEREFORE, the parties hereto, each in consideration of the promises and undertakings of the other as herein provided, do hereby covenant and agree, each with the other, as follows: 1. WRC shall be responsible for developing a mitigation plan for up to approximately 11,272 linear feet of off-site trout stream enhancement mitigation for impacts associated with the construction of the Project. The final length of mitigation to be provided by WRC will be determined after completion of the mitigation plan for the Alleghany County site. Streams selected shall be of similar size or larger. Typical enhancement measures may include, but not be limited to, stream bank stabilization and/or revegetation, installation of fish habitat structures, fish stocking, and fencing livestock out of the stream or constructing managed livestock watering facilities. Said plan shall be reviewed and approved by the COE. All work shall be in accordance with DOT's policy and procedures and subject to DOT's review and approval. _'. DOT shall he responsible for obtaining all easements needed to implement the approved mitigation plan at the required ratio. WRC shall help identify the preferred mitigation areas but shall not be involved in securing said easements. DOT shall attempt to include a provision for angler access into each easement. 3. WRC shall be responsible for all physical stream restoration activities as set out in the approved mitigation plan. All work shall be subject to the review and approval of DOT and comply with federal and state guidelines and procedures. 4. WRC shall complete work set forth in this Agreement within five (5) years from the date of execution of this Agreement or within three (3) years of the date of receipt of the easement, whichever is later. In the event DOT needs an extended period of time to obtain the necessary easements, the period of time for WRC to perform the mitigation tasks shall be adjusted. 5. DOT shall pay WRC for said mitigation work as set out above at the rate of fifty dollars ($50.00) per linear foot of stream restored up to a maximum amount of $563,600. Reimbursement shall be made in three (3) equal installation payments of $140,900, with the first payment made upon execution of this agreement and within 30 days of receipt of an invoice from WRC, and the fourth payment to be made based upon actual feet of restoration needed. The second payment shall be made upon completion of 2,818 linear feet of restoration, the third payment made upon completion of 5,636 linear feet of restoration, and the final payment upon completion of up to 11,272 linear feet of stream bank restoration, or the project has been accepted as complete by DOT. Reimbursements for each installment shall be made upon receipt of an invoice from the Commission, and approval of said invoice by DOT's Nlanager of the Planning and Environmental Branch and the Fiscal Section. A Final invoice must be submitted within one (1) year of completion of said work. 6. WRC shall maintain all books, documents, papers accounting records, and such other evidence as may be appropriate to substantiate costs incurred under this Agreement. Further, WRC shall make such materials available at its office at all reasonable times during the contract period, and for three (3) years from the date of final payment under this Agreement, for inspection and audit by the DOT's Fiscal Section. 7. WRC shall be responsible for meeting the established success criteria of the mitigation plan. DOT shall be responsible for all costs associated with any required maintenance for a period of five (5) years after completion of the work on a costs plus basis. WRC will be responsible for required maintenance for an additional ten (10) years after completion of this project. z , , s IN WITNESS WHEREOF, this :agreement has been executed, in duplicate, the day and vear hereto tore set out, on the part of DOT and WRC by authority duly liven. WITNESS: NORTH CAROLINA WILDLIFE RESOURCES COMMISSION BY: TITLE: NORTH CAROLINA DEPARTMENT OF TRANSPORTATION BY: TITLE: APPROVED AS TO FORM BY: TITLE: