Loading...
HomeMy WebLinkAbout20071855 Ver 1_Application_20071101 (2)~ o~ j V'a'~,~~ STATE OF NORTH CAROLINA U~~;~ , , . DEPARTIV~NT OF 7~tANSPORTATION MIQ-3AEL F. EASLEY LYNDO TIPPETT GOVERNOR SECRETARY \ October 26, 2007 ~~, v ~' 3 U. S. Army Corps of Engineers ~ ~ Regulatory Field Office 151 Patton Avenue, Room 208 ~ ~ ~ ~ ~ . Asheville, NC 28801-5006 I~ ~ - Q. ATTENTION: Mr. Dave Baker J NCDOT Coordinator C, ~ SUBJECT: Nationwide Permit 23 and 33 Applications for the proposed ' Replacement of Bridges 109 & 110 over East Fork Big Crabtree _ Creek On SR 1002 (Crabtree Creek Rd. in Mitchell County. Federal Project No BRZ-1002(9), State Project No. 8.2880701, ~ TIP No. B-4202. v Dear Sir: Please find enclosed a copy of the Pre-Construction Notification, permit drawings, andl/2 size plans for the above referenced project. A Categorical Exclusion was completed for the project on June 25, 2004. A Construction Consultation was completed on September 11, 2007 and distributed shortly thereafter. Additional copies are available upon request. The North Carolina Department of Transportation (NCDOT) proposes to replace Bridges No. 109 and No. 110 on the same alignments with new 75 and 80 feet long single span bridges, respectively. There will be 80 linear feet of permanent impacts to surface waters. Traffic will be maintained via two onsite temporary detours to the east of the existing bridges. IMPACTS TO WATERS OF THE UNITED STATES General Description: The water resource impacted for project B-4202 is East Fork Big Crabtree Creek [Index # 7-2-48-2], and is .classified as "C Tr" by the North Carolina Division of Water Quality (NCDWQ). The project is located in the French Broad River Basin, Hydrological Cataloguing Unit 06010108. Neither High Quality Waters (HQW), Water Supplies (WS-I: undeveloped watersheds or WS-II: predominately undeveloped MAILING ADDRESS: TELEPHONE: 919-733-3141 LOCATION: NC DEPARTMENT OF TRANSPORTATION FAX: 919-733-9794 TRANSPORTATION BUILDING PROJECT DEVELOPMENT AND ENVIRONMENTAL ANALYSIS 1 SOUTH WILMINGTON STREET 1548 MAIL SERVICE CENTER WEBSITE: WWW.NCDOT.ORCa RALEIGH NC RALEIGH NC 27699-1548 watersheds), nor Outstanding Resource Waters (ORW) occur within 1.0 mile of project study area. East Fork Big Crabtree Creek is not designated as a North Carolina Natural or Scenic River, or as a national Wild and Scenic River. East Fork Big Crabtree Creek is not listed as a 2006 303(d) impaired water nor are any listed within one mile of the project area. Permanent Impacts: The construction of the new bridges will result in 45 linear feet of impacts to surface waters for the replacement of Bridge No. 110 (Site 1) and 20 linear feet of impacts to surface waters for the replacement of Bridge No. 109 (Site 3) for bank stabilization. Outfall protection for a drainage ditch entering East Fork Big Crabtree Creek between the two bridges will result in 15 linear feet of fill in surface waters (Site 2). Temporarypacts: Temporary impervious dikes will be utilized for the removal of existing vertical abutments and installation of new abutments resulting in <0.02 acre of temporary impacts to surface waters for the replacement of Bridge No. 110 (Site 1) and <0.01 acre of temporary impacts to surface waters for the replacement of Bridge No. 109 (Site 3). Utilities: There are no impacts to jurisdictional resources due to utilities for this project. Bridge Demolition: Bridge No. 109 is a single span structure with an overall length of 41 feet, and a clear roadway width of 19.3 feet. Bridge No. 110 is a single span structure with an overall length of 42 feet, and a clear roadway width of 19.2 feet. Both bridges were constructed in 1952 and consist of a timber deck with an asphalt surface on a steel I- beams. Bridge Nos. 109 and 110 are structurally deficient and according to federal guidelines are considered to be functionally obsolete. Best Management Practices for Bridge Demolition and Removal will be implemented; however, there is potential for bridge components to drop into Waters of the United States during demolition. Any bridge components that fall into the water during demolition will be removed according to Best Management Practices. FEDERALLY PROTECTED SPECIES Plants and animals with federal classifications of Endangered (E), Threatened (T), Proposed Endangered (PE), Proposed Threatened (PT), are protected under provisions of Section 7 and Section 9 of the Endangered Species Act of 1973, as amended. As of May 10, 2007, the United States Fish and Wildlife Service (USFWS) lists eleven federally protected species for Mitchell County (Table 1). The Bog Turtle and Roan Mountain Bluet were added to the Mitchell County list since the publication of the CE document. The biological conclusion for both is "No Effect" due to lack of suitable habitat. Tahle 1. Federally Protected Species of Mitchell County. Federal Habitat Biological Scientific Name Common Name Status Conclusion Clemm s muhlenber ii Bo Turtle T (S/A) No Not Re uired Glaucomys sabrinus Carolina northern flying E No No Effect coloratus s uirrel M otis sodalis Indiana bat E No No Effect 2 Alasmidonta raveneliana A alachian elktoe E No No Effect Microhexura montiva a S race-fir moss s ider E No No Effect Geum radiatum S readin avens E No No Effect Liatris helleri Heller's blazin star T No No Effect Solida o s ithamaea Blue Ride oldenrod T No No Effect S iraea vir iniana Vir 'nia s iraea T No No Effect G mnoderma lineare Rock ome lichen E No No Effect Hedyotis purpurea var. montana Roan Mountain Bluet E No No Effect MITIGATION Avoidance and Minimization: NCDOT has minimized impacts to the fullest extent possible. • The proposed bridge replacements will mostly span East Fork Big Crabtree Creek • The proposed bridge replacements will use the existing footers from the vertical abutments; therefore, avoiding new permanent surface water impacts from the bridge construction. A September 28, 2007 correspondence from the North Carolina Wildlife Resource Commission (NCWRC) listed a trout moratorium for this project from January 1 to April 15. The Greensheet from the Categorical Exclusion (CE) document stated that there is a Sunfish and Rock Bass Moratorium from May 1 to July 15. Neither of these species is offered federal protection in North Carolina, nor will the inwater construction of the proposed project significantly affect the sunfish and bass. Conversely, imposing an unwarranted moratorium for these species could result in a longer overall construction period. Therefore, NCDOT will only honor the trout moratorium. Compensator~Miti ag tion: Construction for this project will impose temporary impacts and minimal permanent impacts to jurisdictional waters. There are no HQWs on the project and no loss of Waters of the US from bank stabilization therefore, no mitigation is proposed for this project. PROJECT SCHEDULE The project is currently scheduled for review on April 29, 2008 and to Let on June 17, 2008 with construction scheduled to begin shortly thereafter. REGULATORY APPROVALS Section 404 Permit: It is anticipated that the temporary dewatering of East Fork Big Crabtree Creek be authorized under Section 404 Nationwide Permit 33 (Temporary Construction Access and Dewatering). We are, therefore, requesting the issuance of a Nationwide Permit 33 authorizing the temporary dewatering of East Fork Big Crabtree Creek. All other aspects of this project are being processed by the Federal Highway Administration as a "Categorical Exclusion". The NCDOT requests that these activities be authorized by a Nationwide Permit 23. 3 Section 401 Permit: We anticipate 401 General Certification numbers 3403 and 3366 will apply to this project. The NCDOT will adhere to all Water Quality Certification general conditions, therefore, we are not requesting written concurrence. We aze providing two copies of this application to the North Carolina Department of Environmental and Natural Resources, Division of Water Quality, for their records. We anticipate that comments from the NCWRC will be requested prior to authorization by the US Army Corps of Engineers (tJSACE). By copy of this letter and attachment, NCDOT hereby requests NCWRC review. NCDOT requests that NCWRC forward their comments to the USAGE and NCDOT within 30 days of receipt of this application. Thank you for your assistance with this project. A copy of this permit application will be posted on the NCDOT Website at http://207.4.62.65/PDEA/PermApps/. If you have any questions or need additional information, please contact Jeff Hemphill at (919) 715-1458. Sincerely ~, , ~"'~ Gregory J. Thorpe, Ph.D., Environmental Management Director Project Development and Environmental Analysis Branch Cc W/attachment Mr. John Hennessy, NCDWQ (2 Copies) Ms. Marella Buncick, USFWS Ms. Marla Chambers, NCWRC Mr. Hazold Draper, TVA Dr. David Chang, P.E., Hydraulics Mr. Victor Barbour, P.E., Project Services Unit Mr. Greg Perfetti, P.E., Structure Design Mr. Mark Staley, Roadside Environmental Mr. J.J. Swain, P.E., Division Engineer Mr. Roger Bryan, DEO W/o attachment Mr. Jay Bennett, P.E., Roadway Design Mr. Majed Alghandour, P. E., Programming and TIP Mr. Art McMillan, P.E., Highway Design Mr. Scott McLendon, USAGE, Wilmington Mr. Vincent Rhea, P.E., PDEA Planning Engineer 4 Office Use Only: Form Version March OS 2 0 0 7 1 8 3 7 USACE Action ID No. DWQ No. (If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".) I. Processing 1. Check all of the approval(s) requested for this project: ® Section 404 Permit ^ Riparian or Watershed Buffer Rules ^ Section 10 Permit ^ Isolated Wetland Permit from DWQ ^ 401 Water Quality Certification ^ Express 401 Water Quality Certification 2. Nationwide, Regional or General Permit Number(s) Requested: NWPs 23 & 33 3. If this notification is solely a courtesy copy because written approval for the 401 Certification is not required, check here: 4. If payment into the North Carolina Ecosystem Enhancement Program (NCEEP) is proposed for mitigation of impacts, attach the acceptance letter from NCEEP, complete section VIII, and check here: ^ 5. If your project is located in any of North Carolina's twenty coastal counties (listed on page 4), and the project is within a North Carolina Division of Coastal Management Area of Environmental Concern (see the top of page 2 for further details), check here: ^ II. Applicant Information 1. Owner/Applicant Information Name: Gregory J. Thorpe, Ph.D., Environmental Management Director Mailing Address: 1598 Mail Service Center Raleigh, NC 27699-1598 Telephone Number: (919) 733-3141 Fax Number:- (9191733-9794 E-mail Address: 2. Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter must be attached if the Agent has signatory authority for the owner/applicant.) Name: Company Affiliation: Mailing Address: Telephone Number: Fax Number: E-mail Address: Page 1 of 9 III. Project Information Attach a vicinity map clearly showing the location of the property with respect to local landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property boundaries and development plans in relation to surrounding properties. Both the vicinity map and site plan must include a scale and north arrow. The specific footprints of all buildings, impervious surfaces, or other facilities must be included. If possible, the maps and plans should include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property boundaries outlined. Plan drawings, or other maps maybe included at the applicant's discretion, so long as the property is clearly defined. For administrative and distribution purposes, the USACE requires information to be submitted on sheets no larger than 11 by 17-inch format; however, DWQ may accept paperwork of any size. DWQ prefers full-size construction drawings rather than a sequential sheet version of the full-size plans. If full-size plans are reduced to a small scale such that the final version is illegible, the applicant will be informed that the project has been placed on hold until decipherable maps are provided. 1. Name of project: Replacement of Bridges No. 9 & No. 10 on SR 1002 (Crabtree Creek Rd) over East Fork Big Crabtree Creek 2. T.I.P. Project Number or State Project Number (NCDOT Only): B-4202 3. Property Identification Number (Tax PIN): N/A 4. Location County: Mitchell Nearest Town: Little Switzerland Subdivision name (include phase/lot number): N/A Directions to site (include road numbers/names, landmarks, etc.): Take I-40 west to Exit 86 in Marion and turn right on NC 226. Proceed north on NC 226 for approximately seventeen miles to the Blue Ridge Parkway. Head west on the Parkway for three and a half miles to SR 1002 (Crabtree Road) and turn right. Proceed approximately two and a half miles to the bridge sites. 5. Site coordinates (For linear projects, such as a road or utility line, attach a sheet that , separately lists the coordinates for each crossing of a distinct waterbody.) Decimal Degrees (6 digits minimum): 36° 8.55' °N 82° 1.33' °W 6. Property size (acres): N/A 7. Name of nearest receiving body of water: East Fork Big Crabtree Creek 8. River Basin: French Broad River (Note -this must be one of North Carolina's seventeen designated major river basins. The River Basin map is available at http://h2o.enr.state.nc.us/admin/maps/.) 9. Describe the existing conditions on the site and general land use in the vicinity of the project at the time of this application: The site is located in a rural section of Mitchell County. The Page 2 of 9 site is primarily surrounded by mixed hardwoods, bottomland forest and by maintained/ disturbed land. 10. Describe the overall project in detail, including the type of equipment to be used: NCDOT proposes to replace Bridges No. 109 (41 feet long) and No. 110 (42 feet long) on the same alignments with new 75 and 80 feet long single span bridges, respectively. Outfall protection for a drainage ditch entering East Fork Big Crabtree Creek between the two bridges will result in permanent impacts to surface water. Traffic will be maintained via two onsite temporary detours to the east of the existing bridges. Construction equipment will consist of heave trucks, earth moving equipment, cranes, etc. 11. Explain the purpose of the proposed work: The existing bridges are structurally deficient and according to federal guidelines are considered functionally obsolete. The replacement of these bridges will result in safer traffic operations. IV. Prior Project History If jurisdictional determinations and/or permits have been requested and/or obtained for this project (including all prior phases of the same subdivision) in the past, please explain. Include the USACE Action ID Number, DWQ Project Number, application date, and date permits and certifications were issued or withdrawn. Provide photocopies of previously issued permits, certifications or other useful information. Describe previously approved wetland, stream and buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project, list and describe permits issued for prior segments of the same T.I.P. project, along with construction schedules. N/A V. Future Project Plans Are any future permit requests anticipated for this project? If so, describe the anticipated work, and provide justification for the exclusion of this work from the current application. N/A VI. Proposed Impacts to Waters of the United States/Waters of the State It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to wetlands, open water, and stream channels associated with the project. Each impact must be listed separately in the tables below (e.g., culvert installation should be listed separately from riprap dissipater pads). Be sure to indicate if an impact is temporary. All proposed impacts, permanent and temporary, must be listed, and must be labeled and clearly identifiable on an accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial) should be shown on a delineation map, whether or not impacts are proposed to these systems. Wetland and stream evaluation and delineation forms should be included as appropriate. Photographs may be included at the applicant's discretion. If this proposed impact is strictly for Page 3 of 9 wetland or stream mitigation, list and describe the impact in Section VIII below. If additional space is needed for listing or description, please attach a separate sheet. Provide a written description of the proposed impacts: There will be 65 linear feet of permanent impacts to surface waters resulting from bank stabilization at both brides and 15 linear feet for outfall protection at a drainage ditch entering East Fork Big Crabtree Creek between the two bridges. Tem~orarv impervious dikes will be utilized for the removal of existing vertical abutments and installation of new abutments on the existing footers resulting in <0.03 acre of temporary construction impacts. 1. Individually list wetland impacts. Types of impacts include, but are not limited to mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams, separately list impacts due to both structure and flooding. Wetland Impact Site Number (indicate on map) Type of Impact Type of Wetland (e.g., forested, marsh, herbaceous, bog, etc.) Located within 100-year Floodplain ( es/no) Distance to Nearest Stream (linear feet) Area of Impact (acres) N/A Total Wetland Impact (acres) 2. List the total acreage (estimated) of all existing wetlands on the property: 0 acre 3. Individually list all intermittent and perennial stream impacts. Be sure to identify temporary impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib walls, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed, plans and profiles showing the linear footprint for both the original and relocated streams must be included. To calculate acreage, multiply length X width, then divide by 43,560. Stream Impact Number mdicate on (~ ma) Stream Name Type of Impact Perennial or Intermittent. ~ Average Stream Width Before Im act P Impact Length (linear feet) Area of Impact (acres) Bridge 109 E. Fk. Big Crabtree Cr. Permanent Perennial 27 feet 45 <0.03 Bridge 109 E. Fk. Big Crabtree Cr. Temporary Perennial 27 feet 110 <0.02 Between Bridges E. Fk. Big Crabtree Cr. Permanent Perennial 27 feet 15 <0.01 Bridge 110 E. Fk. Big Crabtree Cr. Permanent Perennial 27 feet 20 <0.01 Bridge 110 E. Fk. Big Crabtree Cr. Temporary Perennial 27 feet 30 <0.01 Total Stream Impact (by length and acreage) 220 <0.08 Page 4 of 9 4. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic Ocean and any other water of the U.S.). Open water impacts include, but are not limited to fill, excavation, dredging, flooding, drainage, bulkheads,_etc. Open Water Impact Site Number (indicate on ma) Name of Waterbody (if applicable) Type of Impact Type of Waterbody (lake, pond, estuary, sound, bay, ocean, etc.) Area of Impact acres) N/A Total Open Water Impact (acres) 5. List the cumulative impact to all Waters of the U.S. resultin from the roject: Stream Irn act (acres): <0.05 Wetland Im act (acres): 0 Open Water Impact (acres): 0 Total Irn act to Waters of the U.S. (acres) <0.05 Total Stream Impact (linear feet): 80 6. Isolated Waters Do any isolated waters exist on the property? ^ Yes ®No Describe all impacts to isolated waters, and include the type of water (wetland or stream) and the size of the proposed impact (acres or linear feet). Please note that this section only applies to waters that have specifically been determined to be isolated by the USACE. 7. Pond Creation If construction of a pond is proposed, associated wetland and stream impacts should be included above in the wetland and stream impact sections. Also, the proposed pond should be described here and illustrated on any maps included with this application. Pond to be created in (check all that apply): ^ uplands ^ stream ^ wetlands Describe the method of construction (e.g., dam/embankment, excavation, installation of draw-down valve or spillway, etc.): Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond, local stormwater requirement, etc.): Current land use in the vicinity of the pond: Size of watershed draining to pond: Expected pond surface area: VII. Impact Justification (Avoidance and Minimization) Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide information related to site constraints such as topography, building ordinances, accessibility, and financial viability of the project. The applicant may attach drawings of alternative, lower-impact site layouts, and explain why these design options were not feasible. Also discuss how impacts Page 5 of 9 were minimized once the desired site plan was developed. If applicable, discuss construction techniques to be followed during construction to reduce impacts. See Permit Application Cover Letter VIII. Mitigation DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC Division of Water Quality for projects involving greater than or equal to one acre of impacts to freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial streams. USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide Permits, published in the Federal Register on January 15, 2002, mitigation will be required when necessary to ensure that adverse effects to the aquatic environment are minimal. Factors including size and type of proposed impact and function and relative value of the impacted aquatic resource will be considered in determining acceptability of appropriate and practicable mitigation as proposed. Examples of mitigation that may be appropriate and practicable include, but are not limited to: reducing the size of the project; establishing and maintaining wetland and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of aquatic resource functions and values by creating, restoring, enhancing, or preserving similar functions and values, preferable in the same watershed. If mitigation is required for this project, a copy of the mitigation plan must be attached in order for USACE or DWQ to consider the application complete for processing. Any application lacking a required mitigation plan or NCEEP concurrence shall be placed on hold as incomplete. An applicant may also choose to review the current guidelines for stream restoration in DWQ's Draft Technical Guide for Stream Work in North Carolina, available at http://h2o.enr.state.nc.us/ncwetlands/strmgide.html. 1. Provide a brief description of the proposed mitigation plan. The description should provide as much information as possible, including, but not limited to: site location (attach directions and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet) of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view, preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a description of the current site conditions and proposed method of construction. Please attach a separate sheet if more space is needed. N/A 2. Mitigation may also be made by payment into the North Carolina Ecosystem Enhancement Program (NCEEP). Please note it is the applicant's responsibility to contact the NCEEP at (919) 715-0476 to determine availability, and written approval from the NCEEP indicating that they are will to accept payment for the mitigation must be attached to this form. For Page 6 of 9 additional information regarding the application process for the NCEEP, check the NCEEP website at httt~://h2o.enr.state.nc.us/wro/index.htm. If use of the NCEEP is proposed, please check the appropriate box on page five and provide the following information: Amount of stream mitigation requested (linear feet): N/A Amount of buffer mitigation requested (square feet): N/A Amount of Riparian wetland mitigation requested (acres): N/A Amount ofNon-riparian wetland mitigation requested (acres): N/A Amount of Coastal wetland mitigation requested (acres): N/A IX. Environmental Documentation (required by DWQ) 1. Does the project involve an expenditure of public (federal/state/local) funds or the use of public (federal/state) land? Yes ® No ^ 2. If yes, does the project require preparation of an environmental document pursuant to the requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)? Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA coordinator at (919) 733-5083 to review current thresholds for environmental documentation. Yes ® No ^ 3. If yes, has the document review been finalized by the State Clearinghouse? If so, please attach a copy of the NEPA or SEPA final approval letter. Yes ® No ^ X. Proposed Impacts on Riparian and Watershed Buffers (required by DWQ) It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to required state and local buffers associated with the project. The applicant must also provide justification for these impacts in Section VII above. All proposed impacts must be listed herein, and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ Regional Office may be included as appropriate. Photographs may also be included at the applicant's discretion. 1. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233 (Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 02B .0243 (Catawba) 15A NCAC 2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please identify )? Yes ^ No 2. If "yes", identify the square feet and acreage of impact to each zone of the riparian buffers. If buffer mitigation is required calculate the required amount of mitigation by applying the buffer multi Tiers. Zone* Impact (s uare feet) Multiplier Required Miti ation 1 3 (2 for Catawba) 2 1.5 Page 7 of 9 Total * Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an additiona120 feet from the edge of Zone 1. 3. If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation of Property, Riparian Buffer Restoration /Enhancement, or Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as identified within 15A NCAC 2B .0242 or .0244, or .0260. N/A XI. Stormwater (required by DWQ) Describe impervious acreage (existing and proposed) versus total acreage on the site. Discuss stormwater controls proposed in order to protect surface waters and wetlands downstream from the property. If percent impervious surface exceeds 20%, please provide calculations demonstrating total proposed impervious level. N/A XII. Sewage Disposal (required by DWQ) Clearly detail the ultimate treatment methods and disposition (rton-discharge or discharge) of wastewater generated from the proposed project, or available capacity of the subject facility. N/A XIII. Violations (required by DWQ) Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules? Yes ^ No Is this anafter-the-fact permit application? Yes ^ No XIV. Cumulative Impacts (required by DWQ) Will this project (based on past and reasonably anticipated future impacts) result in additional development, which could impact neazby downstream water quality? Yes ^ No ^ If yes, please submit a qualitative or quantitative cumulative impact analysis in accordance with the most recent North Carolina Division of Water Quality policy posted on our website at http://h2o.enr.state.nc.us/ncwetlands. If no, please provide a short narrative description: Page 8 of 9 XV. Other Circumstances (Optional): It is the applicant's responsibility to submit the application sufficiently in advance of desired construction dates to allow processing time for these permits. However, an applicant may choose to list constraints associated with construction or sequencing that may impose limits on work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and Threatened Species, accessibility problems, or other issues outside of the applicant's control). N/A F. Applicant/A~ent' /~ignature Date (Agent's signature is valid only if an authorization letter from the applicant is provided.) Page 9 of 9 ~~ ~.~ ~~ ~~ ; ao --~~ ~ ~ -, _- _ \ ~r `--'~-~ ti` NORTH CAROLINA i _--- S `~ r-- _ - _~-' ~ " f-- -- 2~ __ \ ~ _~ _ 2 100 ~~~ ~ 11 O @~-~--~~e Pa~ L_ i-- _ Biome R` - - - ~rU 002' ~ ~ ~ sz r q q / ~ I\ ~~ ~ 12 5 ~~ ~ Litt witzerlan ~ _"~ ~ ---~ ~ isgaFt 2e - ` \ Q N I ~ Forest { e "J ~ 40~ e~I -~ ~; ~--~~oun~j~ -~ ~ \ Pisgal-i' ~ ~ ational 1 ~-,> ~~ n~~~ 1 --- ~,, Pis ah Natio -€o es `, '~ ~ - ~-- ~z~ ~~ WETLA11lD PERMIT DRA WI11lG VICI11tITY MAP B-422 '~8 '\ DIVISION OF HIGHWAYS MITCHELL COUNTY PROJECT.• 33549.1.1 (B-4202) REPLACEMENT OF BRIDGE N0.109 AND NO. l10 OVER CRABTREE CREEK ON SR 1002 &9/1007 f a1Nl~lra i. _~ I ~Y•. V '.,,'\I ,1~rr'~~~ -~-1 I i i. ~ \r +`~~.~\~~i i1~ ~' .'MOUfI~I~I~ ~~ il+i,'.~ -~~ '~`~` -~~-- i - ~~ ~) ~~~~~ ~~`. ~~q1, ~~ , i f r ~ ~"' jai' ~/r)'T I ~~ )~~ Ir l ~~~ p0. i ~~ ~' ~~~ -~" ~ ' I ~~~, ~C~ :%~ ~ ~ ) , 1 } ~~} 1 ~~ ~ ~ ;~ / ~ } t I i I1(f l ~ I ,9 ~.-~ i u <~,~<b ~.._ age Rock ~ ~ I ~\~ ~ ~ ( ~, ,~ \ '~ ~ _1 ` ~ ') ~~/~'~' -'-- 1 1 ~ j~ _ ~ ~~ ~' ~ ~\ •. A`~~ / ~I x.11 i ~ „~ .,~;'; ;; ,.I ,~~~0 '~' < ~ ~ %~~) ~ ~ ) s 'X \; ~ ' i ~ ~i , ~ 1 ~ rn ,r , .~ ~ \ ~ , r / r I I f ~ , ~` `r `•\ - t~ , / i' } 1 ` '~` \ - -~ is -~ . \ ~ 1. it ti _.~~¢p tS t/~ C~ `- I I ~ I `' i ~~~ ~ , r ,, rl n l.~-ti~..j ~`' r~ ' 1i~~~_1_~f~,/,~:"7 \, t,Col ~e I ~- .; , ~ .~ (( ~ ~ ~ / u. '(f aew1eW-CEIn} . ; ~ t ) l~/ ~~ ~ ~J ~~ ._ / !// ~ ' a ~ :4 r; ~T ~ 335' l.~. ~ / D-'~ZO~,\ Btt °' "~ ~ ~ \~~ ~ ~ ~' ' i`' ~` '" IZEP~.kCEN~NT o~ Btzw~C•,f~ IJO. ~ ~~ ~' w~r~) !! j ~ ilk ~~) '; ~ ~ti C_~ti tf/ . I~ it C `\ ~, 1l O AND ~JO. 1001 Ov~2 C"(r ~ ~. ~ ; ,I( ~l( ~~ ' ~ r~\ ~~ ~~ ~C r ~ `~ f I~ I,;~" GRR~'C'~EE ~CtTc~t.'1~ U.•J S(Z IOOt ~1 {, } "r•,. r ~ `~`~ ~~ `;\ I \ ./., r ~ I i~~ 1 ~I -~' - n ~ I~ h~ 1TGNf'.'L. {.. ~~. i,,i '' ~ ~((S ~ ~~c2E~A~.~ Iry!{r~~~ _A ~` 1'}~~, %\~~,`` 1~ir^~ .`~L~--~~~~ ;~~\ ( rL /_.~~ r ~ `, ti ., `~ %rr .5~ `-~q ~ - ~ `l.J Sri} ~~~`,'( ``~ ~ `r I ~S\vpm:pe- ~~ ,\~ ~ ~ ` ~ r'. ~, Ill '>~?~, ( l • , . ~~ ~, ~ ~~ `1 y Yom- „"= ~ 3- ~ •,~C-\- /, ~rl t`~ t .' / ` ~ /J_7 1/ / ` ' 1 \ \ ,,~. \~~~`.J -mil `~~Jl '?~~''~r ~ . '~/ i/' I ~ -~~ r S`~ E"' r~l r,~-,~ .-~'\~ ij./~i y,.-: , i(1` ~~~ l;~ ~ fi! I i .''a~ \I- ~ Op i % /~ i/~',~ f ~ ` -,~ I,. ~ ~ ~~ , o ~ ~ 1~3 ~ ~ ,, , 1 f i •~~ 1. '!~'' ~- ' _ ~ I 1` , ~ .,. ~ ~`/ ~ ~~~C ~ ~ ~- 't ., \ r y I f (' l r r l 1~~ II, ~` t ~t. .' i~ -~ ~ i l u7 r.~ .4 @ I ~ :`~~~ r irl ~,~ rl ,~- "r 9 ~7-+1,~\t ~,/~`'/(, I{~f I Q }-~` ~~>\r I ,,,,1~~•j`\~ ~~_\~_,. ~~ \f~~ ~~_~~ , ,' I t ~ ~'- `' `%i, t ~\~ r. ~ ~ I_ / ~ , _ \~''.( T:~ t '~ !-Sfa k"~lo~urita n ~h,. ~, t ,1 .J~ ;'/~ ~,{+,~ti` ~, `~ ~ _ ~< ~~~ )j j r °' - ~ ~}''~Penn Ch ~~ I i 3~~ ; -~` ~ ~~~ ~ ~ ~` ' ' `~ L _ -- ~ w ~~ i ~ \I~' ~ >` ~ JJ~rr -~ ~` ~ (~~ /- 3~ I i )~ J/ r~ j~ j "ti -~ ~ } ~ ~' _ ~/ OVA J - s_ .. ~. / ~~ V '~t t 1 \'I. ` ~ I I , \~ ` ~~ w~ J t\ ~~: r ~ r / -~~\` ~ l,' u ~ f O f 8t s°r •~ _~ , -- ir, ) ~~~,% l~~ 'lf ~ ,'~E- ~,% rr.Vl' r Imo} ,I ~.~ ~~ t'~ ~yY " _ _ ,,~ ~ //~/1 ~ ~ 1 t c~ 1 ' ~ 'r ' ~~ / ~ ' N :~ ~) l , ~ ~ W r \ ~ - :~ ~~fi .. l t ,j'r~~,i(I`I ,`r I~f I;~ ,- =\~-~.i ~~,1; i '\`~~~ j~`11i ~,-- 9{ ~ 1 ~~ ti_ / ..\ ~~ .t>I~ 'j:'~ ~ ~;_J)f~ t'~(^ l`~`~¢l~~f~ll~;,~/ 1 )~ ~ ~ ( rf/;~J' \,V ~~~-._ f11 ~ _ , , r I;.J , J_ ~ I (r ~ ~ ~~(' 300 Jame: CELO )ate: 12/13/2006 icale: 1 inch equals 2000 feet Location: 035° 51' 02.G" N 082° 08' 03.0" W Caption: Project: 33549.1.1 (B-4202) Replacement of Bridge No. 109 and No. 110 over Crabtree Creek on SR 1002 ~, ..~,. 1 QQ7 ~Aantcch Inr ~ ,-7 WETLAND PERMIT IMPACT SUMMARY WETLAND IMPACTS SURFACE WATER IMPACTS Site No. Station (From/To) Structure Size /Type Permanent Fillln Wetlands (ac) Temp. Fillln Wetlands (ac Excavation in Wetlands (ac Mechanized Clearing in Wetlands (ac) Hand Clearing in Wetlands (ac) Permanent SW impacts (ac) Temp. SW impacts (ac) Existing Channel Impacts Permanent (ft) Existing Channel Impacts Temp. (ft) Natural Stream Design (ft) 1 -L- STA 12+91 Dike 1 <0.01 60 1 -L- STA 13+02 Dike 2 <0.01 50 -L- STA 19+94 Dike 4 <0.01 30 1 -L- Sta 12+59 LT Ri Ra at Embankment <0.01 15 1 -L- Sta 12+94 LT Ri Ra at Embankment <0.01 15 1 -L- Sta 12+94 RT Ri Ra at Embankment <0.01 15 -L- Sta 20+05 LT Ri Ra at Embankment <0.01 20 -L- Sta 15+75 RT Ri Ra Outfall Protection <0.01 15 TOTALS: <0.05 <0.03 80 140 N ~ ~w ~ O ~ ~. N OWNER'S NAME ADDRESS 3 Emerald Village,lnc. PO Box 361 Little Switzerlond.NC 28749 O Robert D. Armstron 9 VI PO Box 25200 Gallows Bay. Virgin Islands O 6 Lillian Sparks 3129 Cr btree Rood Spruce ~ine. NC 28777 O Morel Enterprises Limited Enterprises 5292 Boca Morino Clrcle South Boca Raton,FL 33487 8 Marsha L. Styles 3209 Crabtree Rood Spruce Pine, NC 28777 O Francis Boyd 3304 Crabtree Road Spruce Pine• NC 28777 DIVISION OF HIGHWAYS MITCHELL COUNTY N PROPERTY OW11~ER 11tAME A11tD ADDRESS 8--4202 PROJECT.• 33549.1.1 (B-4202) REPLACEMENT OF BRIDGE N0.109 AND NO.I10 OVER CRABTREE CREEK ON SR 1002 8272007 -i- p PI Sra !0+0692 PI Sra N+8556 PI StD 16+16,06 PJ Sta 17+08b1 Pl Sra 22+3555 p = 9'44095'fRTJ p = 65'03'06TliTJ p = 4552'l0.3'lL~) p = IT39'0351CT1 p = lTOr283'fRTI D = 7a 32005' D = 4J' 44 47.3' D = 4T 13' 115 D = 2225' 499' D =6'46' 151 L = 13Ba L = 13624' i = 11!28' L = 787a L = 16282' 7 = 6.92' T = 7652' T = 58.82' T = 39.66' T = 81b6' R = 8123' R = 120.00' R = 139.00' R = 255.45' R = 8462r P15ra 10+6454 Pl SrD 14+2395 Pf Sra 18+44b6 PI SrD 20+96,l,b p = 22'48'38.4fRTl p = 52'34'S55fRTJ p = 549'591Y(LT1 p = 1a 5a125fLTl D = 47' 4447.3' D =47'44' 47.3' D =5'04' 482; D = 9' 32 575' '`~ ~ L = 917T L = 110!3' L = 19356' L = !13.48' --T:= 242r T = 5928' T = 97A2' T = 569r 'R''='t20Da_ R = 120A11' R_ ~(J2796'-= R = 60pDa -ORNE- Pr Sro r0+362r Pr Sra I1+3257 PI sra 10+7592 ~ ~~ p = 99'3a29b'fiTl p = 57'Or28B'IRTJ p = 2r39'31d1'fLTI D = 2251a 592 0 = 19a 54' 09.4 D = 42' 26' 287' :- a l= 43.42' L= 2986' L= SlA3' ' a N a ~ T = 2954 ' T = r6.3a T = 2582 a ~ - R = 25.fA7 R = 30.Oa R = /35.Oa 3~ STA72+58+/- -L- BEGIN APPROACH SLAB STA13+23+/- -L- SHID BfPJ! GUTTER NAD 83 Pl sra rr+2475 p = 53' 02' 035 fRTI D = 38' Ir 995 L = 13884' r = 7989' R = 150Aa PROIER I~JCF N0. SHEET M0. _B_4~Q~- - _ -4- bW SNEET N0. R]ADWAY DESIGN ENGINEER NYDRAWCS ENGIN@R PRELIMIN W NOT URR FO Y PLANS CONSTpULT10N 57A13+38+/- -L- _ STA12+73+/- -C- END BRIDGE ~nPEe-nAAnaRUxlr is Z ~pa . ~-,,,, ~ I BfG1N BRIDGE ®APWiOA^R SLAB SKETCH SNOWING BRlOGE !N RELATION TO PAVEMENT ' PLUG.FILC AND 1 ` ~ABAxaaN Ex 24ACP ; c ~ i j, 6, SHLD BERN GUTTER ~. a N ^0 0 ~/ a N !f STA19+33+/- -L- ~'-E' BEGIN APPROACH SLAB sra +oB+/- - - STA79+48+/- -L- END BRIDGE a BfcrN eRII~E srazD+z.T+/- -L- nPE a-n , uvn END APPROACH SLAB ®nPPROacN sve SKETCH SHOWING BRILGE /N RELATION TO PAVEMENT END SHOULDER EERY WATER ST 21+53 RT ~ - ~'~ 5 .~ - ~ ~ ~~~ -~ A - ,. ,~ ~ , vtl Sl P T T Yl ~ / i \ ~° ` . ~ ( ' l~ 1~ 5~~ ~ # RO EC i'B'RlP ,RAP 7 ~ F ~ / -~ ~~ ~ ~ ~ - - , A - ~ _ ~ w- _. ~ / ` ~ _ ~'~. SPfC1AL 1ATERAL. '/ 'DIlCH SEEE - _ :., ~ -;, y/ ' . ~ DE7 Vl 2 .~ TOJB W/ ~/ ER i ES ~~? - i ; ~ ~ ~ . l0 YN C-0VER'? +Z .W G~ 4 i ~~ REdOVE ~ s!!,~ - 'RCP ~CH SEfC1~ W . L1 REEFOVf-~ - gyp' +z5. SPECIAL ~~gq1•ERAL N' DYfCH SEE DEiNL 2 - :J. kCKIrlF~E: NEr`;. E?AL. ki3 X24 ~7G a_s,U C3 2... - 'J.- "7 / OvrPwk~ DETAIL I DETAIL 2 , SPECIAL CfJi DITCH SPECIAL LATERAL 'V' DITCH PtiOT'c~Tfs L, , uPx~ ~ PIPE HYDRAULIC DATA !Nat to Scae/ INOt to scael ~ rg '~ ~" ~"~ `~ E~ . ~ r ' o51'ACP / ~ x .. `-' ~ ~ ~ ~ Front sot et Oitcn Natura 2'• tt Siope Naturol 2y -- ' 1 ~~•,T,,, ~. ~... U ~t N -~ .. ' ~ -,~' ` ,[i~ ~ ~ DRAINAGE AREA DESIGNfREOUENCY __ ADO AC __~_YRS F Grolnc +1 s0 D Front Fl Or Ground D OII ~ s a 3 '~.. ~. ~g f ~. , a .~ '4''... ~,, `'i DESIGN DISCHARGE _ DESIGN hW EIfVATA7N _ SJ C S 92517F7 ~) 9r 9~Op9 ,, <+5 _ G - ' '~' I __~ ~ + w' _- ` TOO YEAR D15CHA/tGE _ _ 65 CFS MIn. D = I.5 Ft Min. D= I.0' PIPE kYDRAUUC DATA ~„ ' r } ' `~ e',a?t :ES ~~I X11- TOO YEAR HM ELEVATON 292521 FT - O 1BRLP '- :~ '" OVERTOPPING FREQUENCY = __ __rR5 -L- STA 10+00 TO STA 11+25 lRn Y- STA 10+25 TO STA 10+75 ILTJ ~aN~E AREA OB5 AC = WETLAND PERMIT SITE 1 OVERTOPPING DISCHARGE aERroPP1I~ ELtvATaN = _ __ __CFS Fr -L-STA12+91 TO AA 14+50 (LTJ ~ STA20+08 TO STA20+50 (LT) DESIGN fREOUENCY __ P5 YliS __=___ -L- STA. 15+75 TO STA. 16+50 (LTj SIGN DISCHARGE = 1J Cf5 D ENO TEMPORARY SURFACE WATER ' -L- STA 15+50 TO 5G.15+75 (lT) A D DESIGN H1Y ELEVATION = 2936dFT i ® I ~ ~ ~ ~.-STA21+75 TO STA22+50 IR7J P A EMBANRNENT RIP N DO YEAR DISCHARGE _ IS CFS i \ r ' t Not to Scale! PoO YEAR HIY f!£VATIDO = Z9?6A6 FF DENOTES PERMANENT SURFACE WATER OVERTOPPING FREC'JENCY = __- YRS ® IMPACTS OVERTOPPING DISCHARGE _ _ ._CFS Dircn I y OVERTOPPING ELEVATION - FT ' . Grade 6' ' '---'- S0 0 100 ` ?-~ 3.5' r_o ~~ ~ • C ' ' ~ ~\ ~ Permd Q~aY1llT1 Rip-Rap Type of Llner= lass B 1- SU 11+59 lg ~- 5TA :o+os IEn ~ Sheet „_,~_ 0~ 1 ~-' ~ 1-AA Itt91 R ~ k SA 13+91 l ~-- P n -L- ~ PI Sta 10+0692 PI Sta 11+8556 PI Sto 16+16A6 Pt Sta 17+O8b1 P1 Sta 22+3555 p = 544' 095 (RTJ p = 65 03' 06T (LTJ p = 45'52" 10.3" rLT1 p = TP 39' 035 RTJ p = Iron 283" fR71 D = 70'32' 00.3' D = 4T 44' 47.3' D = 4f 13' N5 0 =22'25' 445 D = 646' f51' L = 138a L = !3624' L = !1128' L = 787a L = 16282' T = 692' T = 7652 T =5882' T = 39b6' T = 81b6' R = 8123' R = 720.00' R = 139Aa R = 255.45' R = 8462r PI Sta 10+6454 PI Sta l4+23,95 Pl Sta 18+44b6 : PI Sto 20+%.00 p = 2248' 38.4' fRTI p = 52' 34' 555 rRT) p = 9' 49' S9A' (TJ p = !a 5a 125 RTJ D =47'44' 413' D = 4T 44' 47.3" D = 504' 482'- D = 9' 32575' - L =4771' L = 1!013' 1 = 19356' L = 113.48' ~~~-fib= 242r T = 5928' T = 97A2' T = 569r "R° ==`^120Aa R = 120Aa R = (J2zB6'-: -DRNE- PI Sia 10+3621 Pl Sta 11+3257 P! Sto 10+7592 p = 9a3a 29b' RTJ p = 5ror 2sB'rRn p = 2r3g 31,arLTJ D = 225la 592' D =190' 59'09.4' D = 4226' 287' !:.. L = 43.42' L =2986' L = 5fA3' _ T =2954' T = I6.ia T = 2582' R = 25Aa ~~ -- - R = 30Aa ~ R = l35Aa ~ R = b00Aa SHLD BERM GUTTER 3'-6' b b_ b ~ a ~ ~ .., r a ~ STAl2+5B+/- -L- 3~~' STAB+38+/- -L- BEGIN APPROACH SLAB ND +WPROACH SLAB 57AI3+23+/- -L- STA(2+73+/- -L- END BRIDGE ~~ G"n ~~ Nxlr BEGIN BR/DGE ® Sue SKETCH SHOWING BRILL"E IN RELATION TO PAVEMENT ' - - - PLUG, F/LL AND ~ _ AGANOGN'EX 24'hCP_. -... _ - ~~ ~ _ _, -ti ~ Rpll~ PRGA?SED G TO ORNN ~ ~ _ F !s' i ~ 5,~', . EST ~ - 1 r5' - ~~~~ , LVKE 1 ~SEEE 4 ~ .` ~ _ ~ < ~ .~7 6. 0 ~ ~~ ~ aLY ~~ - SE E ~~' . +0 0 , ay I T ~ 11 ~ , - _- -- ~ ` ~5 ,+~.~ ~ _ ,.~ , naa tes.aa - ., `, ~ .I ~,- -:- On o ? ~. ~~ 7 ~'~ ~' , - ~... ~k J E ~-~ d ' ~ - ag ~- e n ~/ RA9 TEMP VIgD(g ,IyN~K FpOE a~p1CE S~ - - ~0 INn~7pAAOF. NEW MABIIfY~ fRETAiN`fXlSTIA'M FOOTINGSI`. ~ t . \ i, ~~ w w w -L- STA tO+DO TO STA 11+25 (RT) -L-STA. 12+91 TO STA 14+50 IITj ~- STA 15+75 TO STA 1b+50 (Ln -4 STA 15+50 TO STA 15+75 (LTI -l- SU. 21+75 TO 5TA 22+50 (RTI -Y- STA 10+25 TO STA 10+75 (ln -L- STA 20+08 TO STA 20+50 (li) ~~. -- - -- PROTECT REfERHICE NO, ~ 51ffEf NO. NAD 83 PI Sla 11+2475 p = 53' 02' 035 (RTJ 0 = 38'lr499' L = 13884' T = 7484' R = 150Aa roAnwAr oEStcN I EnoAAUUc ENOINEet ENGWEER 5'•s' SHLD 6ERM GUTTER a ~~ a N ,~ ~ ° ~'- a a STA19+33+/- -L- 1'-6' BEGIN APPROACH SLAB STA20+09+/- -L- STAI9+4g+/- -L- END BRIDGE u BEGIN BRIDGE STAZO+23+/- -L- nPE a-n AYf71gt uNrr END APPROACH SlJ~B ® ,IPPROACN SLxB SKETCH SHOWING BR1DGf !N RELATION TO PAVEMENT PRELIMINARY PLANS 00 NOT VSB PO NNSTµUR10N ~: ~ - _ i t ', o~ s -- - - ---,: - ~ ~ - ~ ~ -- - ~-. y - END $NIXlIDER BfRY ~, - _ - ;:" - ~ GUTTER A Zl+5J RT /` ' ~~. ... , .. - .'~.~?~ . S. LrS. € _ De f - ~~E, - - I _ +, ~~ C ' / / '' / ~ r f~ ~.. ES7 7 SK FF .- / / ` ' ~ fem.. ~ _ ~ ~~t~F ~ I L. -~ / PoP RAP AT fNBM'KNENT . '! " CLASS 'G'RIP RAP ~ ~ .~ !,~ ~~~/// . . EST 12 TONS EST 2b SY FF: ~ ~`5 OIT H SEER ~ ~ / / \~l .. i ~ ~ - ~1~' \ " - e $EE DETNL 3 ~ 11°F~il, 2 ; , ~ ~ 7610 W/ '1 10 YH C6VE{ ` ~/ +75.00 G3 9z ,'gE z ~ ~' y F~ / - / ~ 1S i REMOVE ' F (~ . ('1, 54.00' SRG' SPEGa CUT D7CN r ET $E y,(gF ~. ; _ l ~ ~ ~. 'r{ ~ aI E U - RENO/£ ~.~+ as . ,+75 - H CI ~: ~ ~~ n ~ OUTLET PROTfCTIQN. ~ i RM , / ~ . ~ m A~'7NL ~~ E ~ ~ ~(, ~ ~ ~ ~ b ESL 2 N5 j - -- - `vftit,. / „ EST 7 SY FF - ~ ' - - , d- ~~ _ ~\ .00.Y- ~ '' ~'~ ~~ 70AC E ~ ~ ~ ~ '~ ~ SPEGAL LATERAL Y'A7C"H e ~ ~ .ar ~ ` TaL 2 $Ef Li _ - _ • _ - iw - i - ~. .. ` .. ~ ,S.C Aril iv A x. P , ~ S - ,,a,/ ~( ~~ C 3 ~ ~ G . 415 ~ / 1 ~.. ., ~i 1 l ~l PIPE HYDRAt{UE bA?~A` ~~` ~ '~" s°> ~ " ~~~ IB'tCP ,. - . .. ~, 5 _ .. oeaNAGE AaEa = __ oes Ac WETLAND PERMIT SITE 1 DESIGN FREWENCY 25 YR5 ~ DESrGN WSCHARGE DESIGN M4 EIEVATfON r3 CFS = 293611 FT - ® DENOTES ~ IMPACTS TEMPORARY SURFACE WATER ~ ~ '~ rOD YEAR DISCHARu^E IS CFS ``~~,,; r00 rEA9 HW ELEVATION = ?97615 Fi , DENOTES PERMANENT SURFACE WATER ~ ~ 0/ERTOPPING fREOUENLY ...rerwe."N e,re.,.anr = __ ._YRS _ _ ree ® p,~pA~ , 50 0 100 ~~ A-SfA 17+59 lT~ -l-$TA 17+94 8111) 1- AA 12+94 L _ __292511 FT _ 65 CFS - UN 2@2527FT MCY - __ YR5 GE _ __CFS Permit Drawing Sheet ~ of ) ? 9ROr~T OEFELBICF No. I sxt}r riD. rl ~70II*Z4J~ ~ = 53'02'039'fRTI D = 38' lY 499' 1 = r38Ba T = 74Ba R = 15ODd MY SNEEf N0. _ ROADWAY DESIGN r110AAYllCS ENGINE[il elGrgEE PRELIMINARY PLANS op aar use ro mNSreucnod `\ ' ° Nqp 83 °~ ~ -- i1C 4$ "G L'. ~~ a ~I a a a cdm Y tiEiS E~A~. P z~ / ~ r } 4 o e? *7 ~o„ ~~ , ~ 15~' ~t e ~/ TOAD NROPOSED DITC! SPECIAL LATERAL 'V' DITCH i rat to scale ?, NoturaL oir n F/ori o,. 0 sauna Slope 70~ g~ Mtn. O= I,0' -0ET 'B'- STA 20+19 TO STA 20+91 ILT) -Y- STA. 10+A4 TO STA.IO+JS (L7J PROPOSED TD DRAW ~,`~ ._., s ;. , s,~, , ~... '~ 1' 1500. 1~3'~~ ~. ~ / / , / ~ 40 I i / , /i / / ,~ ~`±~ L ~ /^~ . C ~~ ~ ~. ,.J , _ ~8 ~D ~. x ~~ '~ ' s 1000 3000, 1 YPORAR! BOND JB '~ ~ r a 5~5 YP l~ 1~~ r - r~ , ~ ~ ~' r' ~~ / \ ,f i e. f+DD.CD 3100 , l ,n..; i\~ • 13.17' ;:: G \ , . \ ~" PROPOSED TO DAAIN~ ,/ (. ~~ /' r- ~~- ~{' .. +6779 ... -- - ,. -: 35]9' ..__ gc~gusls EST 10 -DETOUR 'A'- PlSta IO+43B5 Pr SID rl><74.94 PIStD r3+5027 ~ = 29'25'19SfRT1 p = 7f43'09B'fLTJ ~ = 35'29'49.0'fRTI D = 47'4a 473' D =41'44' 473' D = 7623' 397' L = 61.62' L = !5021' C =46.47' T = 315Y T = 8673' 7 = 24DY R = 120D0' R = 120Dd R = 75Dd -DETOUR 'B'- PI Sro 18+4658 Pr 5tD l9+2497 PI StD 20+6026 P/ stD 2r+7214 ~ = 2444'28D'fRT1 p = 30'53'059'(11-1 ~ = 261d13b'fLT1 p = 19'04'399'fRT) D =47'44' 473' D =47'44' 473' D =57'!7' 49B' D = 57'!1'44.8' L = 51B2' L = 64b9' L = 45b8' L = 3334 T = 2632' T = 33J5' T = 232a T = 16Bd R = 120Dd R = 120Dd R = IOODd R = 1~Dd i i ~J a a ~e a ~n ~w 1, „ _ i i X .- P1PE HYDRAULIC DATA s0 IBPp DRANAGE AREA = 085 AC DESIGN fREOYlENCY = __ 25 YRS DESIGN DISCHARGE - Li CFS DESIGN M9 ELEVATION = _293611 FT N),7 YfAR DISCHARGE _ !5 CFS N10 TEAR HW EIEYATLON = _2936!6 FT OVERTOPPING FREO(LENCY = _=__rR5 0/ERTOPPING fNSCHARGE _ - CFS OVERTOPPING EIfYATfON = --____fT f E t 50 +25.00 30,00' 60.00' '. . ' ~ ~, +00 00 i { + . ~ ~ J0.00' `mar ~ r: ~ ~ +50 150.00 +OOAO j J - 21. 70.00 +75.00"'<.' : ,_ x +15.00 .~i;-: / L^ t.:. / /~' ~( i `~- :~ ~ I '..A~. ~°aP.Ky ~ ~ rl ^.oa z P~ era ~ ;w sea a es ,'/ ~ \. i r •. I- t ~ .. ,.! i ~ .~~,,., ~/, i _~ ~[a %C, J'i i;~IT LC P.k~: ,i~Pi"iP ~ ro ;« ., v'pTCx 50 0 100 PJPf HYDRAULIC DATA I 17 TEYPaiAR/ 1'BACP DRAINAGE AREA = 2D0 AC DESA"iN FREODENCY __ 2~ _YRS DESIGN L95CNARGE 53 CfS DESIGN iM' E(EVATlON = _ 100 AR 292_5II_f7 F ' I ~ ~'~ _.. 1 `, "~ ,,. rE ascxARGE _ _ 6s c s , IDO YEAR HW ELEVATION = _P92$21 FT OVERTOPPING FREQUENCY = _ =_YR,S aERr~PiNCascxARGE _ =__cFS ~' . wfRr~PING ELEVarroN = :-=---Fr . i ,. Permit Drawing Sheet ~ of I L -0ET 'A'- 5TA 10+24 TO STA 12+7s (RTJ -0ET 'A'- STA 11+29 TO STA 1T+53 hn ~0 DETAIL 2 SPECIAL LATERAL 'V' DITCH ! N61 to Scalel i - Franc F ~~ p NpounG Dttcn ~Otf D ~ slope e,- ~:• Min. O= I.0' -0ET 'B'- STA 20+19 TO 5TA 20+94 ILTJ -Y- STA 10+44 TO STA 10+75 hT) ~~, ~~ rti ,.,,. _.. -Y- ~ -4~QZ--- PI S(o 11+24.75 ww sN~r "o. p = 53' 02' 035 fRTI zoADwAY Dezcar NIORADIIa D = 38' it 995 F"o'"ff' ~'"~ L = 13884' r = 7484' R ' - 150A0 PRELIMIN W NOT U96 Fe RY PLANS CON9TPVCTION _ :. /' - f _.~-. - : ,,. ., , ,.; ._. _ ,_ .. ,. - zJ ~' -. ___ i J - - i -.~p 83 -- - - - - - _ - _; , - - -- 0~ / ;, ,=-.. ~ - :~ -~ - -- _ ~ T _ ~, ~ - .;. _t , . _ z ._ - - -- _, ~ ,. ~~_,, ,~, - , , ,., , ~ _~ _ E _ Q ~ !~ ~ .` _ . = ~ -- . _ ; ~ ~" ~ / ,. . _ ~~;~ ~ ~ , ~o - - __. .. !~. .~ ., ._ _ ~ ~~. ~ J f ~ ~ - ~ ~ ~ ~:_-- r - - ~~.. ~~,. +, ~ .. - ~_ - - -- ~ - - ~ / / / .. / l / ji - ~ ~~ ~~ ~ ' ~ .: SPeC1AL CuT u7Ch'- SEE OE7 _ _ - i /^ i 7 . `/ , ~'- ~ '~ r Z ti AOE•p POSED ~ _ F ~ , ~ ~ 00. ..... ' - _ / ~ '- ~ ~ r . ' __ ,. t t ~ ~ - ~. ~ : ~ +7506 '~ 3000 ~ "~• YPORAR18UIf0 JB __ i ' - V._ e ~ +00.00 ~`, \ a .~ ' \ ,. \ " ,a 10 J C ~ '( ~ij y4 '+_ 1~ ~ fN~ 29ZC 5 ~ .. - i .~ 32.00 ~ \ C , ~_ _ z ri r 13 r i `~,. -- - - - - ~ ~ ~ " -. ~. -~ ,,~ .SEE '~ 1s - ,9• ~-- F ~~ E+1 ~ ~ `~ GRADE PAOPpSED ~% Il[TCl1 TDARAM, - ; ~ ~ .,~'+lo.DO ~ -\~: 700' ]0.00" , / ~ . y~ , r y _-_ ~ ~~ ~' • - 3 i upttl rY f•tl } F &_ ~ _- Cis ~ it r 3 d ~ .~t~' - ~. 10y 00V_ \ ~ v; ~~ ~~ A.. ~:: `. ~. , ~~ ~ `. z ~\ +6500 :~ --- "15.64 ', --- +6774 ~ , ~ RCP - ~ _ 5 -~ - _ e + . + 0 ! ! J000' (61.00' i _ ~ 0+ .00 :~ ni 3 ~ Y :• , ~ .\ p~ PR~EO IYF ~ -.~ T A'N - 3529' `~ .~ ~ -- ~ ~ _-~~ --~ `` 30.0 ~+ 00 0' ~ ~ +SOi00 - ~ - \ \ i \ ~, \ - ~ `~ Q7TIET PROTECT~I(+ 7 CLASS B' R!P-RM 3011( `~ T va ~- ~ I~+Ad'/S '~s \ _ E~~77 3 TONS ~ 24.3]^ ~ ~ /'~,~ ~ ~ _ + i r /t' \ ~ _ ~ '~ ~ ~ 1' ~ ~ ~ ' - r _~ _ ` -. ~~ r " \ - - )^w f ~ ~ II FU ~t4 o i~a toV p, 5 ~ j ~ ~ ' ; ~ ' -DETOUR 'A --~ \ L, ~ ~ ~ ~ ~ ` ' -` P1 Sto 10+4385 P! Sta 11+74.44 PI Sta l3+5027 ~ ,~ ~ ~, ,T ' ., \ ? - >-~ ~- \ I ~ ` ' p = 29'25' 19S' IRTJ ' ' p = 7! 43' 048' RTJ p = 35'29' 49.d fRT1 ' v' ~ ° s _ - ~2 ~, rv~ ~ ' " S ~~5 T _ _ ~r-= ~ -~ ~. i ? L 7 E •F E ~ ~ D = 4T 44 473 D = 4T 44' 473' D = 7623 391 \ ~ ~ _ a FGTs'i ~\ ~, r~ ~ . r N ~ _'i E' t = 6182' L = 1502(' L =46.41 - "> . a T=31St T=86.73' T=24Ar - R = 12(1.00' R = 120Ad R = 75Dd -DETOUR 'B'- P1 S1a 18+4658 PI S(o 19+2497 P! Sto 20+6026. P! Slo 21+7214 1 p = 24'44' 28A' (RTJ p = 3d 53' 055 ILTI p = 2614 lab' fLTJ p = !5 D4' 395 (RTJ D =47'44' 473' D = 47' 44' 473' D =57'(7' 44B' D = ST 17' 44.8' L = 51B2' L = 64b9' L = 45b8' L = 3334 T = 2632' T = 33J5' T = 2324' T = 1684 ~` R = 120.0(~ R = l20.Od R = lOO.Od R = IGOAD' Y ~\ ~SPEGAL'lATERAL 'V'NTCH SEE OETNL 2 l -.-.~ .. 50 0 100 tlrHl/~ ' wit ~~11~ M~OA'~ aw ~ro - S WETLAND PERMIT DRAWING J V T b BSR PROFILE @ STA 12 + 73 -L- B-4202 u~uu w.5.t L.= 2931.9' ~ 025 WS.EL. 2930.6' / - ~ - -- --- _. _ ~ , - -' - - - - -- -- __ ~_ ~f _ __ -- - -- - _ _- ~ ~ _ _ -_ _ ~/ __ - ---- ~N __ -- _ -__ -- ___ ~p q _ _. _ . __ _ ___ __ -. _.__ 1~EAb'{~TION - 250 CY - - ------ _._ . . _ -_. ~~1~~~ ~R_~A ANII. -___. __ _ - - - .. - - ---- - _. -- _. _ --- ~Bfi(~WA~`~tTfMt- - - - - - - _ __ _ _ .._._. -.__ _.__ It ~TIG,~L - ____ _ _ __ - - - _ --- - --- ~E~AII~ ',_ ______ _ --- - WETLA11lD PERMIT DRA WI11 tG STA 19 + 45 ~-- 0 0 N O V W See Suet t-A For Index of Steels THIS PROJECT IS NOT WITHIN ANY MUNICIPAL BOUNDARIES ~T~~C]E ®]F~,71~T®I~~+°~]gH~[ ,~+~AIgI7$®LIlVA ~I~I~I®l~l ®ll' All~'lY~ 0'9' ~~~ MITCHELL COU11lTY LOCATION: REPLACEMENT OF BRIDGE N0.109 AND BRIDGE N0.110 ON SR 1002 (CRABTREE CREEK ROAD) OVER CRABTRF,~E CREER TYPE OF WORl~• GRADING, PAVING, DRAINAGE AND STRUCTURES v n mn lI+RT .pooap ]q ~T .C. 8-4 202 1 nn watR a,.wrs rnnv 33549,1,1 BRZ-1001 Ff 33549.1.1 BRZ-1001 ArW UTIL N` „ ~+ .~ a r +" T N Q ~W c~ o'^ ~ o~ Q Lry ~, :~ N V O U d~ +* DESIGN SPEED EXCEPTION WILL BE REQUIRED CLEARING ON THIS PROJECT SHALL BE PERFORMED TO THE LIMITS ESTABLISHED BY METHOD II GRAPHIC SCALES DESIGN DATA PROJECT LENGTH 50 15 0 50 1 ADT 1005 = 350 LENGTH RpADwAY TIP PROJECT 8-4202 = 0.216 MI ADT 2015 = 600 LENGTH STRUCTURES TIP PROJECT B-4202 = 0.021 MI PLANS DHV = 12 96 TOTAL LENGTH TIP PROJECT 8-4202 = 0.23T MI 5r 15 0 5D toD D = ~6f5 9,G` PROFILE (HORIZONTAL) ++y s 4O MPH 10 5 10 20 • (TT$T 196 + DUAL 296 PROFILE NERTIGLI UNC,CLASS.=RURAL LOCAL PnOOnb rn lh A'tlae d: DIVISION OF HIGHWAYS 100P BIreA A11p Dr., B+btri NC, J76lI 1tIGJJ1' OF WAY DATE: G. E. ERE",, PE JUNE 30,4006 "~sNp1~` L6TfWG DAT& W. T. BEST JUNE 17, 2008 rte' n IJYDRAUL[CS RNGINSBR ROADWAY DBSIGIIf ra DIVISION OF >ffGAR+AYS STATB OF NORTH CARW.IZIL! J>BPARTMSNT OF TRANSPORTAITON FBDBRAL HIGHWAY ADAZII~IISTAATIO] Note: Not m Scale *S.U,E = Srrdu~urJace Ualiry E~eeri~g S°JCA°ll'lE ~1F N~I$TH[ C.~IB~LIN.~ ID~VgSI~N O]F 1H[IG~IW.~~S CONVENTIONAL PLAN SHEET SYMBOLS BOUNDARIES AND PROPERTY State Une --.. ..-...._ County Une Towruhip Une City Une Reservation Une - . - . - Property Line Existing Iron Pin Properly Comer -'~ Property Monument Parnl/Sequence Number Existing Fencs Une -X -X-x- Proposed Woven Wire Fencs s Proposed Choin Unk Fence - ~-- Proposed Barbed Wire Fence -- ~-- Edsting Wetland Boundary - - - -"°- - - - Propoaed Wstland Boundary ~° Existing High Qualify Wetland Boundary -- '° ~'- ExisNng Endangerod Mimol Boundary ~°- Existing Endangered Plant Boundary E"- BUILDINGS AND OTHER CULTIIRB,' Gas Pump Vent or USG Tank Cap o Sign Well ° Small Mine ~' Foundation Q Area Outline 0 Cemetery 0 8uilding u School ~j Church Dom HYDROLOGY.' Scream or Body of Water Hydro, Pool or Reservoir r====] River Basin Bu$er Flow Arrow ~-- Disappearing Stream >---- Spring c~'"~~!~ Swamp Manh ~+ Proposed lateral, Tail, Head Ditch False Sump m RAILR0.9DS.~ Standard Gauge ~, RR Signal Milepost ,,,~„~ Switch ~ RR Abandoned -~- -- -- ~- RR Dismantled RIGHT OF WAY Baseline Corrtrol Poirt . Exstng Right of Way Marker ~ Existing Right of Way Une - Proposed Right of Way Une - ~- Proposed Right of Woy Une with Iron Pin and Cap Marker Proposed Right of Way Une with Concrete or Granite Marker i ti t l f A E C ~;-- ng ccea - x on ro o s - Proposad Cortrol of Access --t~- Existing Easement Line - -e-- Proposed T~mporory Construction Easement - e Proposed Temporary Drainage Eosement- -tos- Proposad Permonent Drainage Easement - -~- Proposed Permanent Utility Easemert -roe- ROADS AND REL9TED FEATURES.• Existing Edge of Pavement -- Existing Curb -- Proposed Slope Stakes Cut - - - ~ - - - Proposed Slope Sfakas Fill - - - F - - - Propos~ Wheal Choir Romp Curb Cut for Futuro Wheel Chair Ramp - cr Existing Metal Guardrail Proposed Guardrail " Existing Coble Guiderail Proposed Cable Guiderail ~ " Equalliy Symbol ~ Pavement Removal VEGETATION.' Single Troe ~ Single Shrub Hedge -~"" Woods Une "'"""''" Orchard Q 4 4 4 Vineyard hneg°r° BXIST7NG STRUCTURES.• MAJOR: Bridge, Tunnel or Box Culvert ~~ Bridge wng Wall, Head Wall and End Wall - MINOR: Heed and End Wall Pipe Culvert Footbridge }----~ Drainage Box: Catch Basin, DI or JB 0~a Paved Ditch Gutter ----- Storm Sewer Manhole Storm Sewer UTILI?7ES.• POWER: Existing Power Pole + Proposed Power Pole b Existing Joint Use Pole -~- Proposed Joint Use Pole Power Manhob Power Une Tower Power Trornformer 8 WG Power Cable Hand Hole H-Frame Pcle ~--~ Recorded U~G Power Uno • Designated USG Power Una {S.U.E."{ - - - -~- - - - TELEPHONE: Existing Telephone Pole + Proposed Telephone Pole ~ Telephone Manhole 0 Telephone Booth D Telephone Pedestal Telephone Cell Tower .~ U~G Teephone Cable Hand Hole Recorded U~G T~ephone Cable ' Designated U~G Telephone Cable (S.U.E.')- - - - -'- - - - Rewrded UG Telephone Conduit " Deaignafad UG Telephone Conduit(S.U.E.q- ----n---- d d U~G Fib O ti C bl R "°- ecor e er p u a e Designated UG FiberOptiaCable (S.U.E.'j- ----"° WATER. Water Manhole Water Meter o water valve Water Hydrant ~ Rxorded l1G Woter Urn - Designated USG Water Une (S.U.E.'} - ---~---- Above Ground Water Une ~~ ~~ Tv. TV Satellite Dish ~ N Pedestal TV Tower U~ TV Coble Hand Hole Recorded l1G TV Coble Designated L6G TV Coble (S.U.E.'j ----r---- Recorded l1G Fiber Optic Coble '• ro- DesignaNd U'G Fiber Optic Cable (S.U.E'r ----'°'^--- GAS: Gas Yalve 0 Gas Meter Recorded USG Gaa Une ° Designated USG Gas Une (S.U.E.q ----_---- Above Ground Gas Uns "'° `°° SANITARY SEWER: Sanitary Sewer Manhole ~- Sanitary Sewer Cleanout p lYG Sanitary Sewsr Une ss Above Ground San'tary Sewer uc saatarr seer Recorded SS Forced Main Une ~u Designated SS Forced Main Une (S.U.E.`J - - - - -ass- - - - MISCELLANEOUS, Utility Pole ~ Utility Pole wrth Base ~ Utility located Obiect o Utility TrafRc Signal Banc m Utility Unknown USG Une M~- lyG Tank; Wofer, Gas, Oil ArG Tank; Water, Gas, Oil UG Test Hole (S.U.E.'~ ~ Abandoned According to Utility Records - AATUR End of Information E,O,1, NOTE: DRAWINQ~ NOT TO SCALE NOTES: BN4 ELEVATION •2935.91 N 780411 E 1071896 L STATION ]8.99 29 LEFT RR SPIKE IN 46' HEMLOCK BM5 ELEVATION •2925.94 N 780943 E 1071527 L STATION 23•]7 232 LEFT RR SPIKE IN 14• NRPLE DATUM DESCRIPTION TIE LOCALIZED COORDINATE SYSTEM DEVELOPED FOR THIS PROJECT 1S BASED ON THE STATE PLANE COORDINATES ESTABLISHED Br NCDOT FOR IOiUIENT '84202-i' IfITN NAD 83 STALE PLANE GRID COORDINATES OF NORTHING: 718413•T8541ft1 FASTING: 1D718T1.fi1681ft> THE AVERAGE C0181ME0 GRID FACTIJA USED ON TNIS PROJECT (GROUND TO GRIDI 15: 0.99980016 TIE N.C. LAIBERT GRID BEARING AND LOCALIZED NORIIONTAL GRDl1U DISTANCE fRON "64202-1" TO ~- STATION 10+00.00 IS S D'S9'47' E 1147.88' ALL LINEAR OIIENSICNS AAE LOCALIZED HORIZONTAL DISTANCES VERTICAL DATLM USED IS NAYp 88 ~ STAB+16.71 BND STATE PROJECT 333494.1 Igor ~ ~~ ~ `_oS LOCALIZED PROJECT COORDALlTES zoCAU~ pgp~ ~~~ H 780749.7187 x ^ rnuas~tt Wo~~ 8 = 10718317180 s = Ian+saen~ ~~ SURVEY C011lTROL SHEET 8-4202 BL POINT OESL. NORTH ERST ELEVATION L STAT]OV OFFSET OP51 842821 778473.7859 1871871.6768 2966.17 23•]6J1 2286.25 RT 3 BL-3 778755.5569 1871947.4228 2961.48 23.16.71 2015.53 RT GP52 B4202~2 779110.9221 1871858.0777 2961.99 23.16.71 ]651.37 RT 4 BL-4 779184,3754 1W1972.&85 2954.66 23•!6.71 ]597.34 RT 5 BLS 77MB7.7373 ]871933.810] 2949.25 23.16.71 ]298.16 RT 6 BL•6 779667,5303 1071883.2324 2946,05 10.56.43 7.33 RT 7 BL-7 779955,4799 ]071954.4813 2943.43 13.64.17 34.12 RT 8 BL•0 788382.4369 ]072085.3301 2937.75 17.48.09 11.32 RT 9 BL•9 780566.1715 ]871801.0527 2930.77 20.81.59 14.88 LT l0 BL-IB 788801,7328 ]071606.610] 2927.36 23.16.71 70.85 L1 1] BL-I1 781127.9374 ]871506.7339 2930.25 23.16.71 486.14 RT 6M1 ELEVATION 295E l9 N 779509 E 1071957 L STATION 23.17 1277 LEFT RR SPINE IN 24' OPIC BM2 ELEVgT70N 2943.33 N 780884 E ]871980 L STATION 14.47 58 RIGHT RR SPIKE IN 36' P~LPA ............. .................... .4. .. &[i ELEVAI]ON •2938.84 N 780220 E 1072056 L STATION 16.63 37 RIGHT RR SPIKE 1N 36' OAK xaoor crs sT~ roc~I.A~o PRAyBCi' COORDQAII&4 x . nkn,ns~ 8 ^ lO71Q7L67Q1 • 1, THE CONTROL DATA POR TB73 PROJECT CAN BE FOUND ELECTRONICALLY BY 9ELECTIlNO PROJECT CONTROL DATA AT: H7TPl1~D~Y,DOH,DOT.BTATEIVGTIB'PRECON3TRUCTi1~OHWAY20l,AT10I1VVPROJEC7Y THE FILER Ta BE FOUND ARE A$ FOLLOWS: B4~ ~ CONTROL_OBO~I.T%T m N N m n N m BITE CALIBRATION DVFORMATION HA8 NOT BEEN PROVIDED FOR TI118 PROJECT: JF FURTHER DVF'OR11AT40N 18 NEEDED, PLEASE CONTACT THE LOCATION AND 9URVEY9 UNIT. INDlCATEB GEODETIC CONTROL MONUMENTS USED OR 9ET FOR HORIZONTAL PROJ&CT CONTROL BY THE NCDOT LOCATION 'JVD 9URVEYB UNIT, PROJECT CONTROL EBTABLIBHED UBINO GLOBAL P087TIONDJO 8Y8TEM -L- STA10+00.00 BEGIN STATE PROJECT 3334914 LOCALCIED PROJECT GOORDAfATES N = 77962L4883 E = 1071831.7180 `' ~ -Y- STA11+947 BND STATE PRQJECT 33549.1.1 ~ LOCALIZED PROJECT GOORDI2YATES N = 780613.7895 E = 1071999.6818 PAVEMENT SCHEDULE (FINAL PAVEMENT DESIGN) C 1 PROP. APPROX. 1" ASPHALT CONCRETE 6UAFACE COURSE, TYPE 6F9.bA, YD E J 1 PROP. S" AGGREGATE BASE COURSE . R SO. AT AN AVERAGE RATE OF 110 LBS. P C2 PROP. APPROX. 2" ASPHALT CONCRETE SURFACE COURSE, TYPE SFB.bA, F TWO LAYERS R1 CONCRETE VALLEY GUTTER AT AN AVERAGE RATE OF 110 LBS. PER 90. YD. IN EACH O PROP. VAR. DEPTH ASPHALT CONCRETE SURFACE COURSE, TYPE 8F9.5A, C3 AT AN AVERAGE RATE OF 110 LBS. PER SD. YD. PER 1" DEPTH. TO RQ CONCRETE SHOULDER BEAM GUTTER BE PLACED IN LAYERS NOT TO EXCEED 2~" IN DEPTH E1 PROP. APPROX. 4" ASPHALT CONCRETE BASE COURSE, TYPE B25.OB, Y T EARTH MATERIAL D. AT AN AVERAGE RATE OF 456 LBS. PER SD. PROP. VAR. DEPTH ASPHALT CONCRETE BA8E COURSE, TYPE 826.OB, E Z AT AN AVERAGE RATE OF 114 LBS. PER SO. YD. PER 1" DEPTH. TO BE PLACED IN LAYERS NOT LESS THAN 9 IN DEPTH OR GREATER U EXISTING PAVEMENT THAN 61~" IN DEPTH NOTE: PAVEMENT EDGE SLOPES ARE 1:1 UNLESS SHOWN OTHERWISE. W VARIABLE DEPTH ASPHALT PAVEMENT (SEE STANDARD WEDGING DETAIL SHT 2-B) • NOTi« 7' M41F1 GUARDRAIL rn a VAR. 6' INSET 'A' USE INSET'A'IN CONJUNCTION WITH TYPICAL SECTION N0.1 AND TYPICAL SECTION N0.2 -L- FROM STA. 13+28.08 TO STA. 13+54.75 ON UEFi EDGE OF PAYEMENi -lr FROM STA. 13+45.76 TO STA. 13+54J5 ON RIGHT EDGE OF PAVEMENT -tt FROM STA. 20+23.00 TO STA. 21+54.78 ON LEFT EDGE OF PAVEMENT eamw cwua - ~ _ - ~tl k~ GRADE TO THIS UNE~ TYPICAL SECTION N0. 1 0.0l;~ io,03 0.~ T GRADE TO THIS UNE TYPICAL SECTION N0. 2 'IR *~ r0 ty oaara amu~ USE TYPICAL SECTION N0.1 -1r FROM STA. 10+00.00 TO STA. 11+02.82 ~ FROM STA 20+33.00 TO STA. 21+75.00 -Ir FROM STA. 21+75.00 TO STA. 22+T5.OO,TRANSRION FROM TYP. SECT. N0.1 TO EXISTING • Nora: r vm-+ GUARDRAIL r ~ *~~ ~ ?'/ USE TYPICAL SECTION N0.2 ~~~~ ~ FROM STA. 13+43,00 ~ ~ NQ 1BRIDGE]~,TO STA~15+3319 -L- FROM STA.19+33.00 TO STA.19+46. +~ BEGIN BRIOGE) -L- FROM STA. 20+08.00+,~ (END BRIDGE{ TO ~A. 20+39.00 -Y- FROM STA. 14+50.67 TO STA. 10+49.91 -Y- FROM ~TA,10+4~p1 TO STA. 11 +88.75, TRANSITION FROM TYP. SECT. N0.2 VV EXISTING a v FINAL PAVEMENT DEBION C1 PROP. APPROX. 1" ,TYPE 8F8.bA ('Q PROP. APPROX. 2", TYPE 8F9.6A E1 PROP. APPROX. 4", TYPE 826.OB Rj COHCRETE VALLEY OUTTEA T EARTH MATERIAL V EXIBTINO PAVEYEYT W YAIRABLE DEPTH ASPHALT PAVEMENT INSET 'B' USE INSET 'B' IN CONJUNCTION W1TH TYPICAL SECTION N0.4 !M!W OAdMO -Ir FROM STA. 18+06.22 TO STA. 18+57,42 ON LEFT EDGE OF PAVEMEM TYPICAL SECTION N0. 3 TYPICAL SECTION N0. 4 27' 9'~' 10' 10' 7'~b" GRADE rorar ~ w 1• r TYPICAL SECTION N0. 5 ON STRUCTURE I ,'~" 10' 10' 3'-6' POINT n 1 `~ ~ 1' 1' TYPICAL SECTION N0. b ON STRUCTURE JL - _ . _ . - eotna aeaMo USE TYPICAL SEC110N N0.9 -lr FROM STA. 15+33.19 TO STA.16+68.51 JL - _ . _ ~ - aMiMC OWUND USE TYPICAL SECTION N0.4 -lr FROM STA. 18+00.00 TO STA. 18+50.00, TRANSITION FROM EXISTING TO T1T. SECT. N0.4 -lr FROM STA. 18+50.00 TO STA. 19+48.00 USE TYPICAL SECTION N0.5 ~.- FROM STA. 12+73.00+,~ TO STA. 13+13.00+~- USE TYPICAL SECTION N0. b -L- FROM STA. 19+48.00+~ TO STA. 10+08.00+~ P P FINAL PAVEIffNT DEBION C1 PROP. APPROX. 1" ,TYPE 8FB.6A CZ PROP APPROX~ 2", TYPE 8F9.6A C3 PROP. VAR. DEPTH, TYPE BFB.6A EP PROP. VAR. DEPTH, TYPE 976.08 1 PROP. 8" AGGREGATE BASE COUA9E T EMTN MATERIAL V EXISTING PAYE9ENT 0~ GRADE TO TTHIS UNEJ TYPICAL SECTION N0. 7 - - . _ ~ - Dai1N0 OIOIMID USE TYPICAL SECTION N0.7 -0ET'A'-FROM STA. 10+50.OOT0 STA. 11+15.27,TRANSITiON FROM EXISTING TO TYP. SECT. N0.6 -0ET'A'- FROM STA. 11+15.27 TO 5TA.13+10.00+~ ((BgEGIN BRIDGE -0Ei 'A'- FROM STA. 13+60.00+~ (END 6RIDGEJ TO 5TA.15+27y46 -0ET'A'- FROM 15+27.46 TO 15+65.88,TAAN RION FROM TYP. SECT. N0.7 TO E10SIING IL - _ ~ _ . - mtn+o aouo USE TYPICAL SECTION NO. B -0ET'B'- FROM STA.16+20.26 TO STA. 18+82.66,TRANSRION FROM E10STING TO NP. SECT. N0.6 -0ET'B'- FROM STA. 18+62.66 TO STA. 19+75.00+,~ ((6EGIN BRIDGE -0Ei '6'- FROM STA. 20+35.00+,~ (END BRIDGE TO STA. 21 +19.33 -0ET `B'- FROM STA. 21+19.33 TO STA.21+87.16, TRANSRION FROM TYP. SECT. N0.8 TO EXISIING m U a V ' NOTE: 3' WITH GUARDRAIL L - - - - -- - - - - - - - - - - - - - -- - -- - J ~ Wedging Detail For RRSUrfacing TYPICAL SECTION N0. $ B 0 i `c a a m -L- PI Sfo b+06~2 PI Sto 1/+85.515 P151a 16+16,06 Pt Sfa O+pg61 PI S1a 22+3555 o - g44'o9srRn o = ss'o3'o6,7• rcr) o - 4ssrlo.~rc J o = rr39'o39urJ o = rrOr283'rRTI ' D = 7p3r 00.3' D -41'44'473' D - 4rr3'tr9 D =22'25'449 46' 151 D =6 80' L = !3624' L = 13 L - !1128' L - 7870' L =16282' . T • 69r T - 1652' T = 588r T - 3966' 7 = &66' R = &23' R - 120m' R = 139m' R =255.45' R ~ 84621' Pl Sta 10+6454 PI Sto k+2395 P! S1o 18+4466 P1 Sta 20+95A0 Tl D = g~~ rLT) (Rrl 55 rRTJ _ ~~ ~ 4 ~ 73" ~3' D = ~ D - S04'482' L =4177' L = Ip/3' L =193.56' ~ = 11~ ~``~g.~ T = 5928' T - 970r ~~ "0R"~ R = IGYJ,DD' ~ R ' R : 6.00' ~~ ~ le4,a w3 ~ w SHLD BERN (Xlr7ER -ORNE- ~,,~. PI Sla p+3621 PI SM 11+32,51 PI Sro q+7592 ' ' ~ 3/0 ( 1 ~ = 95r30'29BfLTJ p = 5T'Or28BlRr) O. 2139 5ga9¢ a~ssr 2 o: ~~28TN v; ~ ~ v4`4 ~ ~ T =2954' T= ~ T -2582' u W ' R =2500' R •3000' R - r35m STA12+5B+/- -L- 3'-E STA/3+J8+/- -L- N APPROACH SLAB 10+0 -BEGIN TIP PROD Cr BEGIN APPROACH S111B B 4202 ST 12+73+/- -L- SfA13+23+/- -(- ~ ~ ~ ,~ ~ END BRIDGE Q CYNTHIA WINDLEY OB 329 PG I55 A EIP a1,93. BEgN BRIDGE Sggy~~E ®A^Hglp/ SLAB ~2 EP SKETCH yfOwMG BRnNiE rx RELA7IQM 70 PAVEMENT P FILL M10 EX MRCP P ~ qo woros a M CHRISTIa NSTED PORT TERMINAL CORPORATION -. - PT 1 f 1 DB 41} PG 475 Cq~ - bl ~, O 4~5095 , EP yy~p/~/yPl nFaI4 1lTWUV-L- PR~E~TKM ~'~~ XAP i 6 p0 • °/ ~ ~` U' J2+45 PT f 28 -L- ~ u ~ ,,6 s ~ P°~ Q Q ~ ~~ A - ~ a S XF K- RIP RAP AT E~&WAYENf woods ~ Ctt55 'B'HP RAP EST + TTMS rEALH1 r R A IJ+ ~ECYAALL CUr OIFO'I SEE 0.~TA1L I g ,. ~g6 / 4-0e ' EST 9 SY Ff rEACYR PCS1a /5+5724 -L- Sa 15 ~ ~ -iuC ~ e~' ~~ ~' + ~ / N RCP ,~ // _' ~ IsvG s x~ s. - + ~ ~ - - _ ~ ~ ~-- ~ + ~ ua r~ -E- ' dTdr ~~ v Z ~ R ~ + SE AK + OEIP IOppS OOD POS1a NJ+4034 -L- ~ ~ ~~. s~ I 0 t4 ~ Er ~ +!0.00 Y9i . \t'r ~ PCS1o. n - - ~. 10+0666-~ Sm ~ 1 ` ~ / ~ Pm..~t4. ~+5~.~-OR- + 44Qx77L'M/_ PC57o 13+64~ $.D. McKINNEY HEIRS, ETdL. OB TS PG 301 TO L1RMM . O P 7 - - ,~ 35 3 PC 08 224 De 260 PG 19 PT ll ~' Sfa 11+~,Q]-OR- POT Sta ,~ RAR AT E4IBAIIAYE E~p~pp gE ART R A 7+50 Ri n 257-DR- Af PT S1a t1+4613-OR- CLASS '8' PoP RAP EST ,raves ESr s sr FF SEE OETAR 3 TSYa r4+7479 -[- DETAI I DETAI SPECIAL CUi DITCH SPECIAL LATERAL 'v' DITCH I NOt t0 SaAN INpt 10 $CQNI Front ~ 0< OIteN ~pt{ SbD. Fran Pj~tlp„ Ground traund D G1~ 0*y6r D Z~ LAn. D = 45 Ft NIn. D= I.0' a,. STA 10+Oe TO ilA. Il+li IAII -Ir STA 15+7i TO SG. id+~ (LTJ -+- STA, i5+50 ro Ati 15+7s ILT1 -Ir AA 21+75 TO STA.11+50 IRT( v- srA. ~0+15 1o STA 7D+7s an -~ srti 1o+als To STA 1a+5o {LTf DETAIL 3 RP RAP AT ~ANRMENT I Not to Scdst Oitcn L5' Gratle 6' 3.5" Type of Llner= Class 'e' RtD-Rap k {TA 17+5Y ~4 7TA IDY0.1 lu ~ IRA r21K J ~A'i f` w00DS p4 NAB 83 PlSJO N+2475 o = 53'oro39rRr~ D = 381r 499 L = 13884' T = 7484' ,~, SHiD BERM GUTTER /~ ~ ~ ~ BEGIN APPROACH SLAB +/- - STA19H8+/- - fN0 BRIDGE ~ BEGIN BiNDGE STA2O+23+/- -L- 0 me e n Alaun uen END ARPROACk 51AB ® APP/nl(yl sue SKE7CH S+>awrNG BRrDGE rN RELA7gl1 70 PNEYfXf al.ie. N 04 Se,o~ ~h ~ ~~ ~ --_ Prh aP RAP Ar E M sE CUSS 'BRM a°Pn @ Ea r FF ~ LL IAN SPARKS LI 06 oe 212 PG z74 06 164 PC 659 c g SEWIC p1NMFlEIp. i o ` N PNOxwxw 4 E tLCS 50 I ON 5p~ ISEE !I 1 1 ~` .w ~ G. io.~0~. ' ' • a O PCSIa 16+8&94 - SA, McKINNEY HEIRS. ETAL. w O DB i5 PG 301 OB T9 PG Ii2 ° DB 224 PC 475 0~ DB 260 PG 19 GREdT MEApOwS ~ i D9 120 PG 379 71~p59 ~9 n~' ~ 95 yya~ )m -L- END TIP PROTECT B~ q~ gE PTSfa 2l+5257 -L-, TA IJ~5.7R~ ' ,~ b Ah 5 A ~61AP PCS1a 20+3909 - ~~t ~!` i 1 of 1n ~ W . ias ~ / ~"~~ ei ~~ ~ Y~" ~s E ;~~ i~ys Ia +, /A YE „ rv ^~ I r6 l ~° w s~ s ' A .OD' _ ~~ ,~ N 1 1IW+i• K' IAGAC /w04F - E ~ + -Y- 941VSi -Y• AISn rv !r P7Sla i1+88,75 -Y- LILLIAN SPARKS OB 212 PG 214 \ o0B Ifi4 PC 654 ~ ' >` r off' !1 ~ + z ~// O MdREL ENTERPR6ES LIMITEp PARTNERSHIP N OB 32fi PG 419 N K Fro,KT~~ No, ~e~ Na B-4202 4 Aw Iwar No. 'AACNAY D!!0N RYDIAUIIC! le4oel~ll Ie+o7l4es PRELIIKIN RY PLANS m Rot vs ro mASExucY4a~ e~ Fy 0 ~ o IO ROBERT D. ARMSTRONG D0 139 PC 1ST ~~ w1G71 IIEYP 48A421 ~riES,~ j ~~ ,(y/rA`Pi~x ~ ~ y-~ NTL \ CATEY O ~ L ReNCES L, BOYp + oB N2 PG B6 + RCP aA~rrr 07CR ~ +~~ AL 1 +sas. ACSYaZp21+$5389 -L-~ ~ n~~1~ 7 SY Ff ~~ A 4r ~` .ff L>: 4YY I S7a20+6750 L- _ POTSral0+0000 ~ s d ERAL r x AIL 2 + / ~k. +~ * ~+ ~ ~ .ftAl1eli a- En POTSta N+95.41 -Y- E~ cti ,E 1~~A5 S 4202_rdu_osh5.dan ~~ t~ 7$ ~~~oD~ ~o~roD~ p q l / I q II II II II II O ~~~`~~o ~~~~~$ ~4 ~y~ ~-I~oD~ ~y^oD~ uuully~ rluuuv~ o p ~~a~~~ ~p~~~ :+ $v'~Q~~.,a 4w ~lwa ~~~ ~ ~~~ I n g gl ~ ~ ~~~oD~ ~ x-I~oDv ru'uuc~ ux°uu~ v+A~"iO Vlb~yy'V(M~ ~~~ ~§~ ~`+)`OD~ uu'luuv„~ v ~~a~~ ~~~ N gg~p•30,E 1~ S y~ ~ ~_ $o ~~ ~ ~ O ~' ~y$~ ~~~ I ~~~w€ 1 A ~J2 . _. w~ M O~~ ~~ ' ' > o ~~ 00 TT N N + t NN I Y w ~'~ ~' R ~ m ~ ~ ' ~ v o c1 D ~^ c - -o - _ o ~' ~ ~ i O o_w + n~n~ 7~ gg~ ,] A ~" ~" 1`++~ 16J. 8E5)• 6'E ~`~ ~~ ~~~ T4 o~ +p o`~, 0~0 _~ ~~ ~O Q .+. O y~ o S ~ ~~ c; ~~ ~ ~ -< v t 0 ~~ ~.+p + ~ ° r o ~~ ~~ g _ ~~~~- - ~'~ f ~12 ~y^oDv M N 4 M 1 ~ I a~D~`'~+ ~~~~~N ; ~~~ .. N ~S. 6 ~~~ . ~~, b ~',~ s~ II Q ~ ~~ ~ s ~, ~~ ~~ ~~ ~~N iN z ~ ,gip ,• \ ~ ~ ~ $$y 1f C V tj ~ z ~ ~ ~7 202_Rdy_xpl_I.dgn MITCHELL COUNTY BRIDGE NOS. 109 & 110 ON SR 1002 (CRABTREE CREEK ROAD) OVER CRABTREE CREEK FEDERAL-AID PROJECT N0. BRZ-1002(9) STATE PROJECT N0. 8.2880701 TIP N0. B-4202 CATEGORICAL EXCLUSION U.S. DEPARTMENT OF TRANSPORTATION FEDERAL HIGHWAY ADMINISTRATION AND N.C. DEPARTMENT OF TRANSPORTATION DIVISION OF HIGHWAYS APPROVED: 23 a~ D TE Gregory J. Thorpe, Ph.D. Environmental Management Director Project Development & Environmental Analysis Branch North Carolina Department of Transportation '~ ~ / ~ -, ~_ ~ ,, s ~ f f ~ a _ .• DATE ~.~,~;:< John F. Sullivan, III, P.E. Division Administrator Federal Highway Administration r MITCHELL COUNTY BRIDGE NOS. 109 & 110 ON SR 1002 (CRABTREE CREEK ROAD) OVER CRABTREE CREEK FEDERAL-AID PROJECT N0. BRZ-1002(9) STATE PROJECT N0. 8.2880701 TIP N0. B-4202 CATEGORICAL EXCLUSION Document Prepared by Ramey Kemp & Associates, Inc. 4928-A Windy Hill Drive Raleigh, North Carolina 27609 (~-2- Date For the North Carolina Department of Transportation r Vincent J. Rhe~~E., Project Development Engineer Project Develop ent and Environmental Analysis Branch Montell W. Irvin, P.E., P.T.O.E. Ramey Kemp & Associates, Inc. PROJECT COMMITMENTS MITCHELL COUNTY BRIDGE NOS. 109 & 110 ON SR 1002 (CRABTREE CREEK ROAD) OVER CRABTREE CREEK FEDERAL-AID PROJECT N0. BRZ-1002(9) STATE PROJECT N0. 8.2880701 TIP N0. B-4202 In addition to the standard Nationwide Permit #23 Conditions, the General Nationwide Permit Conditions, Section 404 Only Conditions, Regional Conditions, State Consistency Conditions, NCDOT's Guidelines for Best Management Practices for the Protection of Surface Waters, NCDOT's Guidelines for Best Management Practices for Bridge Demolition and Removal, General Certification Conditions, and Section 401 Conditions of Certification, the following special commitments have been agreed to by NCDOT: Division Construction The NCDOT will observe a moratorium on in-water work between May 1 to July 15 to protect fish spawning. Categorical Exclusion Page 1 of 1 June 2004 MITCHELL COUNTY BRIDGE NOS. 109 & 110 ON SR 1002 (CRABTREE CREEK ROAD) OVER CRABTREE CREEK FEDERAL-AID PROJECT N0. BRZ-1002(9) STATE PROJECT N0. 8.2880701 T.I.P. N0. B-4202 INTRODUCTION The replacement of Bridge Nos. 109 & 110 located on SR 1002 (Crabtree Creek Road) over Crabtree Creek are included in the North Carolina Department of Transportation (NCDOT) 2004-2010 Transportation Improvement Program (TIP) and in the Federal-Aid Bridge Replacement Program (BRZ-1002(9)). The location is shown in Figure 1. No substantial impacts are anticipated. The project is classified as a Federal "Categorical Exclusion". I. PURPOSE AND NEED The NCDOT Bridge Maintenance Unit records indicate Bridge Nos. 109 & 110 have sufficiency ratings of 45.6 and 25.9, respectively, out of a possible 100 for a new structure. The bridges are considered structurally deficient and functionally obsolete. The replacement of these inadequate structures will result in safer and more efficient traffic operations. II. EXISTING CONDITIONS Bridge Nos. 109 and 110 are located on SR 1002 (Crabtree Creek Road) in rural Mitchell County. Refer to Figure 1 for the project location and Figures 2 and 3 for photos of the existing project study area. Bridge No. 109 was constructed in 1952. The bridge is currently posted to restrict weight limits to 15 tons for single vehicles (SV) and 18 tons for truck-tractor semi-trailers (TTST). The overall length of the single-span structure is 41 ft. It has a clear roadway width of 19.3 ft that includes two travel lanes over the bridge. The superstructure consists of a timber deck on I-beams. The substructure consists of abutments made of yount masonry. The height from crown to streambed is 9 ft. Bridge No. 110 was constructed in 1952. The bridge is currently posted to restrict weight limits to 11 tons for single vehicles (SV) and 15 tons for truck-tractor semi-trailers (TTST). The overall length of the single-span structure is 42 ft. It has a clear roadway width of 19.2 ft that includes two travel lanes over the bridge. The superstructure consists of a timber deck on I-beams. The substructure consists of abutments made of yount masonry. The height from crown to streambed is 9 ft. SR 1002 is classified as a rural local in the Statewide Functional Classification System. The 2001 average daily traffic volume (ADT) is estimated to be 300 vehicles per day (vpd). The percentages of truck traffic are 1 percent TTST vehicles and 2 percent dual-tired vehicles. The projected 2025 ADT is 600 vpd. Z The two-lane facility measures approximately 16 ft in width and has 2 ft grassed shoulders on each side of the roadway in the vicinity of the bridges. The horizontal alignment of SR 1002 is poor adjacent to the bridges. There are numerous curves on either side of the bridges. The vertical alignment is generally flat within the project study area. There is no posted speed limit in the immediate vicinity of the bridges. Therefore, the statutory speed limit is 55 miles per hour (mph). Existing right-of-way is approximately 60 ft in width. There are aerial electrical and telephone services in the vicinity of the bridges. There are no utilities attached to either bridge. Utility impacts are expected to be minimal. This section of SR 1002 is not part of a designated bicycle route nor is it listed in the Transportation Improvement Program as needing incidental bicycle accommodations. There is no indication that an unusual number of bicyclists use this roadway. Land use within the project area is a mixture of undeveloped land, rural residential properties, and forest land. There is a large commercial gem mining operation at the intersection of SR 1002 and SR 1100 about one mile south of the project. According to Mitchell County school officials, two buses cross these bridges in the morning and three buses cross them in the afternoon for a total of five trips per day. Crash records maintained by the NCDOT indicate there have been no crashes reported in the vicinity of Bridge Nos. 109 and 110 during a recent three year period. III. ALTERNATIVES A. Project Description Based upon the preliminary hydraulic reports, the proposed replacement structures for Bridge Nos. 109 and 110 will consist of a 75 ft bridge and an 80 ft bridge, respectively. The structures will provide two 11 ft travel lanes with 3 ft of lateral clearance on each side of the bridge. The length and opening size of the proposed structures may increase or decrease as necessary to accommodate peak flows, as determined by a more detailed hydraulic analysis to be performed during the final design phase of the project. The roadway approaches will provide two 11 ft travel lanes with 5 ft grassed shoulders. The grade will be approximately the same as the existing roadway. The design speed will vary for each alternative. B. Build Alternatives Two (2) build alternatives studied for replacing the existing bridges are described below: Alternative A Alternative A consists of replacing the bridges in-place with new bridges. During construction, traffic will be maintained by on-site detours east of the existing bridges. The total length of roadway approach work for this alternative is approximately 760 ft, Refer to Figures 4 thru 6 for illustration of this alternative. 2 The on-site detours will be located 30 to 50 ft east of the proposed bridges. The temporary structures will consist of two 84 inch CMP's for Bridge No. 110 and three 84 inch CMP's for Bridge No. 109. The detour roadway approaches for Bridge No. 110 will provide one 14 ft signalized travel lane and 3 ft wide shoulders on each side. The detour roadway approaches for Bridge No. 109 will provide two 9 ft travel lanes and 3 ft wide shoulders on each side. The length of the temporary detours will be approximately 260 ft for Bridge No. 110 and 428 ft for Bridge No 109. Alternative B Alternative B consists of replacing the bridges with new bridges on new alignment east of SR 1002. During construction, the existing bridges will be used to maintain traffic. The total length of roadway approach work for this alternative is approximately 1665 ft. Refer to Figures 7 and 8 for illustration of the alternative. Alternative B was not selected as the preferred alternative because of the higher environmental impacts associated with the new location alignment. C. Alternatives Eliminated From Further Consideration The "Do-Nothing" alternative will eventually necessitate closure of the bridges due to their poor condition. This is not desirable due to the traffic service provided by SR 1002. Investigation of the existing structures by the NCDOT Bridge Maintenance Unit indicates that rehabilitation of the old bridges is not feasible due to their deteriorated condition. D. Preferred Alternative (Alternative A) Alternative A consists of replacing the bridges in-place with new bridges. Alternative A was selected as the preferred because it has the least environmental impacts and the lowest construction costs. The Division Engineer concurs with Alternative A as the Preferred Alternative. E. Anticipated Design Exception The speed limit is not posted on SR 1002; therefore, a statutory speed limit of 55 mph applies. Due to the existing road conditions a design exception will be required for the horizontal alignment for Alternative A. IV. ESTIMATED COSTS The estimated costs for each alternative, based on current dollars, are shown below: Table 1 Estimated Project Costs Alternative A (Preferred) Alternative B Structure Removal existin $16,400 $16,400 Structure Pro osed $347,200 $347,200 Detour Structure and A proaches $166,618 $0 Roadwa A roaches $87,477 $470,766 Miscellaneous and Mobilization $169,305 $266,634 En ineerin and Contin encies $113,000 $199,000 Right-of-Way/Easement and Utilities $92,000 $113,000 Total Project Cost $992,000 $1,300,000 The estimated cost of the project, as shown in the 2004-2010 NCDOT Transportation Improvement Program is $760,000 including $100,000 spent in prior years, $60,000 for right-of-way and $600,000 for construction. V. NATURAL RESOURCES Natural resources within the project study area were evaluated to provide: 1) an assessment of existing vegetation, wildlife, protected species, streams, wetlands, and water quality; 2) an evaluation of probable impacts resulting from construction; and 3) a preliminary determination of permit needs. A. Methodology Research was conducted prior to the field investigations. Published resource information pertaining to the project area was collected and reviewed. Resources utilized in this preliminary investigation of the project area include: • U.S. Geological Survey (USGS) Celo and Little Switzerland 7.5-minute quadrangle maps. • U.S. Fish and Wildlife Service (USFWS) National Wetlands Inventory (NWI) map for Celo and Little Switzerland 7.5-minute quadrangles. • North Carolina Department of Transportation (NCDOT) aerial photographs of the project study area (Scale: 1:1200 scale). • U.S. Department of Agriculture, Natural Resource Conservation Service (formerly the Soil Conservation Service) provisional Soil Survey of Mitchell County, North Carolina (unpublished). • U.S. Environmental Protection Agency Water Discharges and RCRA Map accessed via EPA's EnviroMapper Program (September 2001). Water research information was obtained from publications of the North Carolina Department of Environment, and Natural Resources (NCDENR, 2000a, 2000b, 2001). Information concerning the occurrence of federal and state protected species in the project study area was obtained from the U.S. Fish and Wildlife Service list of protected and candidate species (March 3, 2001) and from the North Carolina Natural Heritage Program 4 (NCNHP) database of rare species and unique habitats (NCNHP, 2001). NCNHP files were reviewed for documented occurrences of state and federally listed species. USFWS Recovery Plans for federal listed species were reviewed, where applicable. A field investigation of natural resources within the project study area was conducted on July 25, 2001. Water resources were identified and categorized, and their physical characteristics were documented while in the field. Plant communities and their associated wildlife were also identified and documented. The Classification of Natural Communities of North Carolina, Third Approximation (Schafale and Weakley, 1990) was used to classify plant communities, where possible. Plant taxonomy was based primarily upon the Manual of the Vascular Flora of the Carolinas (Radford, et al., 1968). Animal taxonomy was based primarily upon Amphibians and Reptiles of the Carolinas and Virginia (Martof, et al., 1980), Freshwater Fishes of the Carolinas, Virginia, Maryland, and Delaware (Rohde, et al., 1994), Birds of the Carolinas (Potter, et al., 1980), and Mammals of the Carolinas, Virginia, and Maryland (Webster, et al., 1985). Approximate boundaries of major vegetation communities were mapped while in the field utilizing aerial photography of the project study area. Wildlife identification involved active searching of known or suspected species, incidental visual observations, incidental auditory indicators (such as Birdsong and other sounds), and secondary indicators of species presence or site utilization (such as scat, tracks, and burrows). Predictions regarding wildlife community composition were supplemented utilizing a general qualitative habitat assessment based on existing vegetation communities and aquatic habitat. Wetlands subject to regulation by the Corps of Engineers under Section 404 of the Clean Water Act and Section 10 of the Rivers and Harbors Act of 1899 were identified and delineated according to methods prescribed in the 1987 Corps of Engineers Wetlands Delineation Manual (Technical Report Y-87-1) and the Corps' March 6, 1992 guidance document titled Clarification and Interpretation of the 1987 Manual. Values of wetlands delineated were assessed utilizing the Guidance for Rating the Values of Wetlands in North Carolina (NCDEHNR, 1995). Wetland types were classified based on the U.S. Fish and Wildlife Service Classification of Wetlands and Deepwater Habitats of the United States (Cowardin, et al., 1979). Wetland boundaries were surveyed and recorded in the field using Global Positioning Satellite (GPS) survey methods. B. Physiography and Soils Mitchell County lies in the Blue Ridge (Southern Appalachian) Mountains Physiographic Province of western North Carolina. The county encompasses 220 square miles and is primarily rural. The county ranges in elevation from approximately 1,900 ft mean sea level (msl) where the Nolichucky River flows into Tennessee to over 5,800 ft in the Roan Mountain area msl. Elevations within the project study area range from approximately 2,940 to 3,000 ft msl, with the stream bed near the bridge lying at approximately 2,940 ft msl. The portion of Mitchell County within the project study area (NRCS map panels I-11) has been mapped by NRCS under the current provisional soil survey. Official soil series descriptions were also obtained by the NRCS (USDA: http://www.statlab.iastate.edu/soils/osd). A brief description of soil types mapped by NRCS and/or observed during field investigation is as follows: • Sandy cobbly fluvaguents along the stream bed (unmapped by NRCS but observed during field investigation). 5 • Bandana sandy loam, 0 to 3 percent slopes, occasionally flooded. This soil unit consists of very deep, somewhat poorly drained sandy foams that are found on floodplains of small streams in the Southern Appalachian Mountains. The A horizon of Bandana sandy foams typically consists of up to 8.0 inches of yellowish brown (10YR5/4) dry, friable, slightly acidic sandy loam. Permeability is moderately rapid and runoff is negligible to very low. Bandana sandy foams underlie the East Fork Big Crabtree Creek floodpfain in the northern portion of the project study area. This soil is classified as non-hydric (USDA, 1996). • Dellwood-Reddies complex, 0 to 3 percent slopes, occasionally flooded. This map unit is comprised of 50 to 60 percent Dellwood soils and 40 to 50 percent Reddies soils. These soils are moderately well- drained and occur on floodplains. The surface layer typically consists of a thick, dark colored, loamy to sandy layer. Permeability is moderately rapid in the surface layer and rapid in the subsoil. The seasonal high water table ranges from 2.0 to 4.0 ft below the surface. These soils underlie the East Fork Big Crabtree Creek floodpfain in the southern portion of the project study area. These soils are classified as non-hydric (USDA, 1996). • Saunook-Thunder complex, 15 to 30 percent slopes, stony. This map unit is comprised of 50 to 60 percent Saunook soils and 40 to 50 percent Thunder soils. These soils are very deep and well-drained and occur on benches, fans, and toe slopes in coves. The surface layer is typically a thick, dark loamy layer. Numerous stones are scattered across the surface, especially along drainageways. Permeability is moderate in Saunook soils and is moderate to moderately rapid in Thunder soils. The seasonal high water table is greater than 6.0 ft below the surface. Seeps and springs are common. These soils underlie moderately sloping land surfaces west of the East Fork Big Crabtree Creek floodpfain in the southwestern portion of the project study area. These soils are classified as non-hydric (USDA, 1996). • Chandler-Micaville complex, 30 to 50 percent slopes, stony. This map unit is comprised of Chandler foams and Micaville sandy foams. These soils are very deep and somewhat excessively drained. They occur on upland ridges and side slopes. The surface layer is loamy and numerous stones are scattered across the surface. Permeability is moderately rapid. The seasonal high water table is greater than 6.0 ft below the surface. These soils underlie moderately to steeply sloping land surfaces east of the East Fork Big Crabtree Creek floodpfain in the southeastern portion of the project study area. These soils are classified as non-hydric (USDA, 1996). C. Water Resources C.1. Waters Impacted A perennial stream, Crabtree Creek, comprises the single water resource within the project study area. Crabtree Creek is located within the Nolichucky River subbasin of the French Broad River Drainage Basin. The French Broad River Basin is the ninth largest watershed in North Carolina, encompassing 2,842 square miles. Crabtree Creek is approximately 15 ft wide within the project study area. The average stream depth observed at the time of the field investigation was 0.5 to 2.5 ft. The field investigation occurred during a rain event and, as a result, surface waters were turbid. Water levels appeared to be slightly above the ordinarily high water level at the time of the field investigation. 6 C.2. Waters Resource Characteristics The substrate of Crabtree Creek in the project study area is comprised of sediments ranging in size from sand to boulders. The stream within the project study area is relatively straight and exhibits a relatively simple trapezoidal cross-section. No sand bars or channel meanders were observed. The stream banks are confined by vertical retaining walls beneath and adjacent to the existing bridge. A portion of the left stream bank upstream of the bridge has been armored with riprap to protect the road embankment. The left stream bank downstream of the bridge is well vegetated with a 40 to 60 ft wide zone of healthy trees, shrubs, and grass with good root systems. The left stream bank upstream of the bridge parallels the right-of-way of SR 1002 and, as a result, is less densely vegetated. The right stream bank throughout the project study area is vegetated with a zone of few small trees and shrubs that is less than 20 ft wide and which appears generally healthy. The stream banks are comprised of unconsolidated poorly sorted sediments of alluvial and colluvial origin, with several intervening riprap segments. Under the federal system for cataloging drainage basins, the drainage basin containing the project study area is designated as USGS hydrologic unit 06010108 (the Nolichucky River drainage basin). Under the North Carolina DWQ system for cataloging drainage basins, the drainage basin containing the project study area is designated as Subbasin 04-03-06 (the North and South Toe Rivers and Nolichucky River subbasin). Crabtree Creek has been assigned Stream Index Number 7-2-48-2. Crabtree Creek has been assigned a best usage classification of C Tr. The C designation indicates waters that are protected for secondary recreation, fishing, wildlife, fish and aquatic life propagation and survival, agriculture, and other uses found suitable for Class "C" waters. Secondary recreation is any activity involving human body contact with water on an infrequent or incidental basis. The surface water classification Tr is a supplemental classification intended to protect freshwaters for natural trout propagation and survival of stocked trout. As stated in the standards, this designation affects wastewater quality but not the type of discharges, and there are no watershed development restrictions except stream buffer zone requirements of the North Carolina Division of Land Resources. No surface waters classified as High Quality Water (HQW), Water Supplies (WS-I or WS-II), or Outstanding Resource Waters (ORW) occur within 0.6 mile of the project study area. Crabtree Creek does not appear on the Department of Environment and Natural Resources 303d list of waters not meeting water quality standards or which have impaired uses. One method used by DWQ to monitor water quality is through long-term monitoring of macroinvertebrates. There are no benthic monitoring stations on Crabtree Creek within the project study area. Discharges that enter surface waters through a pipe, ditch or other well-defined point of discharge are broadly referred to as "point sources". No registered point source discharges are located within the Crabtree Creek watershed or the project study area (EPA, 2001). C.3. Anticipated Impacts to Water Resources Impacts to water resources in the project study area are likely to result from activities associated with project construction. Activities likely to result in impacts consist of clearing and grubbing along stream banks, removal of riparian canopy, instream construction, use of fertilizers and pesticides as part of revegetation operations, and installation of pavement. The following impacts to surface water resources are likely to result from the aforementioned construction activities: • Short-term increases in sedimentation and siltation downstream of the crossing associated with increased erosion potential in the project study area during and immediately following construction. • Short-term changes in incident light levels and turbidity due to increased sedimentation rates and vegetation removal. • Short-term alteration of water levels and flows due to interruptions and/or additions of surface water and groundwater during construction. • Short-term increases in nutrient loading during construction via runoff from temporarily exposed land surfaces. • A short-term increase in the potential for the release of toxic compounds (such as petroleum products) from construction equipment and other vehicles. • Changes in and possible destabilization of water temperature regimes due to removal of vegetation within or overhanging the watercourse. • Increased concentrations of pollutants typically associated within roadway runoff. To minimize potential impacts to water resources in and downstream of the project study area, NCDOT's Best Management Practices for the Protection of Surface Waters (NCDOT, 1997) will be strictly enforced during the construction phase of the project. Impacts will be minimized to the fullest degree practicable by limiting instream activities and by revegetating stream banks immediately following the completion of grading. C.4. Impacts Related to Bridge Demolition and Removal In order to protect the water quality and aquatic life in the area affected by this project, the NCDOT and all contractors will follow appropriate guidelines for bridge demolition and removal. These guidelines are presented in three NCDOT documents entitled: Pre-Construction Guidelines for Bridge Demolition and Removal, Policy: Bridge Demolition and Removal in Water of the United States, and Besf Management Practices for Bridge Demolition and Removal. The superstructure for Bridge Nos. 109 and 110 are composed of a timber deck on steel I-beams. The substructure is composed of yount masonry abutments. Neither the superstructure nor the substructure will create any temporary fill in the creek. However, the removal of the substructure may create some disturbance of the streambed. If removal of the substructure will create disturbance in the streambed, a turbidity curtain should be used due to sediment concerns. The North Carolina Wildlife Resources Commission (NCWRC) requests a moratorium on in-water work between May 1 and July 15 to prevent off-site sedimentation from impacting fish eggs and fry downstream of the site. Because a moratorium applies and Crabtree Creek has been assigned a best usage classification of C Tr, this project falls under Case 2 (allowing no in-water work during moratorium periods) of the Best Management Practices for Bridge Demolition and Removal. S D. Biotic Resources Living systems described in the following sections include communities of associated plants and animals observed within the project study area. These descriptions refer to the flora and fauna in each community and the relationship of these biotic components. Biotic resources assessed as part of this investigation include discernable terrestrial and aquatic communities. The composition and distribution of biotic communities within the project study area are a function of topography, soils, hydrology, and past and present land uses. Terrestrial systems are discussed primarily from the perspective of dominant plant communities and are classified in accordance with the Classification of Natural Communities of North Carolina: Third Approximation (Schafale and Weakley, 1990) where applicable. Representative animal species likely to inhabit or utilize biotic communities of the project study area (based on published range distributions) are also discussed. Species observed during field investigation are listed. D.1. Plant Communities Boundaries between contiguous biotic communities are gradational in certain portions of the project study area, making boundaries sometimes difficult to delineate. Five discernable terrestrial communities are located within the project study area. Of these communities, four have been altered to the extent that they cannot be classified as a natural vegetation community under the Classification of Natural Communities of North Carolina. These altered communities consist of: (1) altered right-of-way communities, (2) landscaped areas, (3) fallow pastureland, and (4) cropland. The remaining community within the project study area retains enough of its natural characteristics to be classified under the Classification of Natural Communities of North Carolina. This natural community consists of Piedmont/Mountain Bottomland Forest. In addition to the aforementioned terrestrial components, the aquatic community associated with East Fork Big Crabtree Creek was assessed within the project study area. Altered Right-of-Way Communities -- These communities are located along the right-of-way bordering on SR 1002. Vegetation within these areas has been maintained in an early succession through mechanical and possibly chemical vegetation management practices. No mature woody were observed at the time of site investigation within altered rights-of-way of the project study area; however, saplings and seedlings observed include red maple (Acer rubrum), tulip tree (Liriodendron tulipifera), black cherry (Prunus serotina), black locust (Robinia pseudo-acacia), witch-hazel (Hamamelis virginiana), mountain laurel (Kalmia latifolia), yellow buckeye (Aesculus flava), river birch (Betula nigra), tag alder (Alnus serrulata), flowering dogwood (Cornus florida), southern arrowwood (Viburnum dentatum), and multiflora rose (Rosa multiflora). Dominant herbaceous species observed at the time of site investigation include orange jewelweed (Impatiens capensis), red clover (Trifolium pratense), Queen Anne's lace (Daucus carota), jack-in-the- pulpit (Arisaema triphyllum), creeping grass (Microsteguim vimineum), common plantain (Plantago major), turk's cap lily (Cilium superbum), Christmas fern (Polystichum acrostichoides), Curtis' goldenrod (Solidago curtisii), joint head (Arthraxon hispidus), goldenrod (Solidago sp.), thimbleweed (Anemone riparia), bee balm (Monarda didyma), ginseng (Panax quinquefolium), wood sorrel (Oxalis sp.), and Joe-pye-weed (Eupatorium fistulosum). Dominant vine species observed at the time of site investigation include tick-trefoil (Desmodium nudiflorum), poison ivy (Toxicodendron radicans), Japanese honeysuckle (Lonicera japonica), common greenbrier (Smilax rotundifolia), trumpet creeper (Campsis radicans), and riverside grape (Vitis riparia). 9 Landscaped Areas -- This community consists of cleared, landscaped, and vegetatively managed areas around several nearby residential dwellings. Dominant plant species observed at the time of site investigation include assorted cultivars, crab grass (Digitaria sanguinalis), common plantain (Plantago major), white clover (Trifolium repens), dandelion (Taraxacum officinale), common chickweed (Stellana media), and unidentified grasses (Poaceae). Fallow Pastureland --This community is dominated by pioneer and opportunistic plant species and is located in the northern portion of the project study area. The slopes within this community are gently sloping to nearly level. The successional nature of the vegetation community suggests that the area was cleared of native vegetation and that the vegetation has been managed for several or more growing seasons. No mature trees or shrubs have yet become established within the fallow pastureland. Dominant woody species observed at the time of site investigation include witch-hazel (Hamamelis virginiana), mountain laurel (Kalmia latifolia), yellow buckeye (Aesculus flava), river birch (Betula nigra), tag alder (Alnus serrulata), flowering dogwood (Corpus Florida), and multiflora rose (Rosa multiflora). Dominant herbaceous species observed at the time of site investigation include jewelweed (Impatiens capensis), red clover (Trifolium pratense), Queen Anne's lace (Daucus carota),fack-in-the-pulpit (Arisaema triphyllum), creeping grass (Microsteguim vimineum), common plantain (Plantago major), Christmas fern (Polystichum acrostichoides), Curtis' goldenrod (Solidago curtisii), joint head (Arthraxon hispidus), goldenrod (Solidago sp.), thimbleweed (Anemone riparia), bee balm (Monarda didyma), ginseng (Panax quinquefolium), wood sorrel (Oxalis sp.), Joe-pye-weed (Eupatonum fistulosum), and unidentified grasses (Poaceae). Dominant vine species observed at the time of site investigation include tick- trefoil (Desmodium nudiflorum), poison ivy (Toxicodendron radicans), Japanese honeysuckle (Lonicera japonica), common greenbrier (Smilax rotundifolia), trumpet creeper (Campsis radicans), riverside grape (Vitis riparia), and Virginia creeper (Parthenocissus quinquefolia). Cropland -- This community consists of recently cultivated cropland located in the northernmost portion of the project area. This community is located on gently sloping land surfaces adjacent to SR 1002 and the Piedmont/Mountain Bottomland Forest, which separates the cropland from Crabtree Creek. PiedmontlMountain Bottomland Forest -- This community type occurs along the banks of East Fork Big Crabtree Creek in all quadrants of the project study area. The Piedmont/Mountain Bottomland Forest occurs upon a nearly level to gently sloping floodplain terrace perched approximately 3.5 to 4.5 ft above the stream bed. The terrace is largely underlain by moderately well-drained fluvaquents exhibiting relatively high chromas but, where poorly drained conditions prevail, hydric soil inclusions are observed. Dominant tree species observed within the Piedmont/Mountain Bottomland Forest at the time of site investigation include red maple (Acer rubrum), sycamore (Platanus occidentalis), black gum (Nyssa sylvatica), tulip tree (Liriodendron tulipifera), Fraser magnolia (Magnolia fraseri), black cherry (Prunus serotina), black locust (Robinia pseudo-acacia), green ash (Fraxinus pennsylvanica), eastern hemlock (Tsuga canadensis), and white pine (Pinus strobus). Dominant sapling and shrub species observed at the time of site investigation include witch- hazel (Hamamelis virginiana), mountain laurel (Kalmia latifolia), yellow buckeye saplings (Aesculus flava), river birch (Betula nigra), tag alder (Alnus serrulata), flowering dogwood (Corpus florida), southern arrowwood (Viburnum dentatum), and multiflora rose (Rosa multiflora). Dominant herbaceous species observed at the time of site investigation include orange jewelweed (Impatiens capensis), red clover (Trifolium pratense), Queen 10 Anne's lace (Daucus carota), jack-in-the-pulpit (Arisaema triphyllum), creeping grass (Microsteguim vimineum), common plantain (Plantago major), New York fern (Thelypteris noveboracensis), turks cap lily (Cilium superbum), Christmas fern (Polystichum acrostichoides), Curtis' goldenrod (Solidago curtisii), joint head (Arthraxon hispidus), goldenrod (Solidago sp.), thimbleweed (Anemone riparia), bee balm (Monarda didyma), ginseng (Panax quinquefolium), wood sorrel (Oxalis sp.), and Joe-pye-weed (Eupatorium fistulosum). Dominant vine species observed at the time of site investigation include tick-trefoil (Desmodium nudiflorum), poison ivy (Toxicodendron radicans), Japanese honeysuckle (Lonicera japonica), common greenbrier (Smilax rotundifolia), trumpet creeper (Campsis radicans), riverside grape (Vitis riparia), and Virginia creeper (Parthenocissus quinquefolia). D.2. Wildlife All of the communities within the project study area have been significantly altered or affected by man's activities. Due to forest tract fragmentation common to the project region, species that require large contiguous tracts of forests are not likely to utilize the site on a normal basis. Certain opportunistic wildlife species, such as white- tailed deer (Odocoileus virginianus), woodchuck (Marmota monax), and eastern cottontail rabbit (Sylvilagus floridanus) can be expected to periodically utilize edge habitat present within the project study area. Due to the relatively small size of the project study area and the fact that many wildlife species are capable of moving between and/or utilizing adjoining communities, no distinct terrestrial wildlife habitat can be assigned to any one terrestrial plant community within the project study area. No mammals were observed in the project study area at the time of field investigation. Although not observed, mammals common to the project region which can be expected to periodically utilize habitat of the project study area include: Virginia opossum (Didelphis virginiana), shrews and moles (Insectivora), beaver (Castor canadensis), gray squirrel (Sciurus carolinensis), eastern harvest mouse (Reithrodontomys humulis), white-footed mouse (Peromyscus leucopus), golden mouse (Ochrotomys nuttalli), hispid cotton rat (Sigmodon hispidus), eastern woodrat (Neotoma floridana), meadow vole (Microtus pennsylvanicus), woodland vole (Microtus pinetorum), muskrat (Ondatra zibethicus), black rat (Rattus rattus), Norway rat (Rattus norvegicus), house mouse (Mus musculus), meadow jumping mouse (Zapus hudsonius), woodland jumping mouse (Napaeozapus insignis), raccoon (Procyon lotor), red fox (Vulpes vulpes), black bear (Ursus americanus), long-tailed weasel (Mustela frenata), eastern spotted skunk (Spilogale putorius), striped skunk (Mephitis mephitis), and bobcat (Fells rufus). The open fields and shrub stands on the project study area provide suitable forage areas for a variety of birds. A wide variety of resident and migratory songbirds can be expected to periodically utilize habitat present in the project study area. The open fields on and near the project study area provide probable hunting grounds for birds of prey, such as hawks and owls. No reptiles or amphibians were observed in the project study area at the time of field investigation. A variety of reptile and amphibian species may use the communities located in the project study area. These animals include the rat snake (Elaphe obsoleta), eastern box turtle (Terrapene Carolina), five-lined skink (Eumeces fasciatus), two-lined salamander (Eurycea bislineata), pickerel frog (Rana palustris), and American toad (Bufo americanus). D.3. Aquatic Communities No aquatic or water-dependent vertebrates were observed within the project study area at the time of field investigation. Aquatic orwater-dependent invertebrates observed within the project study area at the time of field investigation include crayfish (Cambaridae), gilled snails (Pleuroceridae), mayfly larva (Heptageniidae), aquatic 11 beetle larvae (Psephenidae), case-making caddisfly larvae (Trichoptera), net-spinning caddisfly larvae (Hydropsychidae), and water striders (Gerridae). D.4. Anticipated Impacts to Biotic Communities D.4.a. Terrestrial Communities Impacts Potential impacts to plant communities are estimated based on the approximate area of each plant community present within both the proposed right-of-way and the temporary construction limits of any on-site detour or easement that falls outside the estimated permanent right-of-way limit. A summary of potential plant community impacts is presented in Table 2. All plant community impacts are based on aerial photograph base mapping. A portion of the permanent plant community impact amount will consist of proposed right-of-way for the road after the bridge replacement is complete. Impervious surface and open water areas are not included in this analysis. Table 2 Potential Impacts to Plant Communities POTENTIAL IMPACTS PLANT acres COMMUNITY ALT A (Preferred) ALT B Im acts Tem . Im acts* Im acts Altered Right-of-Way Communities 0.00 0.00 0.00 Landscaped Areas 0.00 0.38 0.38 Fallow Pastureland 0.00 0.16 0.41 Cropland 0.00 0.25 0.06 Piedmont/Mountain Bottomland Forest 0.00 1.46 2.27 Total (acre) 0.00 2.25 3.12 TOTAL FOR ALT (acre 2.25 3.12 * Note: Temporary construction impacts are based on the portion of the impacts that fall outside the estimated right-of-way limit or impacts of temporary on-site detours. The highest amount of permanent plant community impacts result from Alternative B, which calls for bridge replacement on new location. The plant community with the largest amount of potential permanent and temporary impacts for all proposed alternatives is the Piedmont/Mountain Bottomland Forest community. D.4.b. Aquatic Communities Impacts The replacement of Bridge Nos. 109 and 110 over Crabtree Creek will result in certain unavoidable impacts to the aquatic community. Probable impacts will be associated with the physical disturbance of the benthic habitat and water column disturbances resulting from changes in water quantity and quality. Significant disturbance of stream segments can have an adverse effect on aquatic community composition by reducing species diversity and the overall quality of aquatic habitats. Physical alterations to aquatic habitats can result in the following impacts to aquatic communities: • Inhibition of plant growth. • Resuspension of organic detritus and removal of aquatic vegetation that can lead fo increased nutrient 12 loading, Nutrient loading can, in turn, lead to algal blooms and ensuing depletion of dissolved oxygen levels. • Increases in suspended and settleable solids that can, in turn, lead to clogging of feeding structures of filter-feeding organisms and the gills of fish. • Loss of benthic macroinvertebrates through increased scouring and sediment loading. • Loss of fish shelter through removal of overhanging stream banks and snags. • Increases in seasonal water temperatures resulting from removal of riparian canopy. • Burial of benthic organisms and associated habitat. Unavoidable impacts to aquatic communities within and immediately downstream of the project area will be minimized to the fullest degree practicable through strict adherence to NCDOT's Besf Management Practices for fhe Protection of Surface Waters (NCDOT, 1997) and other applicable guidelines pertaining to best management practices. Means to minimize impacts will include (1) utilizing construction methods that will limit instream activities as much as practicable, (2) restoring the stream bed as needed, and (3). revegetating stream banks immediately following the completion of grading. E. Special Topics E.1. "Waters of the United States": Jurisdictional Issues Surface waters within the embankments of the Crabtree Creek are subject to jurisdictional consideration under Section 404 of the Clean Water Act as "Waters of the United States" (33 CFR 328.3). Wetlands subject to review under Section 404 of the Clean Water Act (33 U.S.C. 1344) are defined by the presence of three primary criteria; hydric soils, hydrophytic vegetation, and evidence of hydrology within 12 inches of the soil surface for a portion (12.5 percent) of the growing season (DOA 1987). No wetlands have been mapped within the project study area under the National Wetlands Inventory (NWI) program. The surface waters within Crabtree Creek exhibit characteristics of a permanently flooded, upper perennial, riverine habitat with an unconsolidated bottom (R3UBH). Crabtree Creek is a jurisdictional surface water. E.2. Anticipated Impacts to Waters of the United States Temporary and permanent impacts to surface waters and wetlands are estimated based on the amount of each jurisdictional area within the project limits. Temporary impacts include those impacts that will result from temporary construction activities outside of permanent right-of-way andlor those associated with temporary on- site detours. Temporary impact areas will be restored to their original condition after the project has been completed, Permanent impacts are those areas that will be in the construction limits and/or the right-of-way of the new structure and approaches. Portions of those areas that are considered temporary impact areas often end up being within the final right-of-way. Potential wetland and surface water impacts are included in Table 3. J Table 3 Anticipated Impacts to Surface Waters JURISDICTIONAL AREAS ALT A (Preferred) ALT B Impacts Tem . Im acts* Im acts Perennial Stream Channel Impacts ft 0.0 100 0.0 TOTAL FOR ALT ft 100 0.0 *Note: Temporary construction impacts are based on the portion of the impacts not included in the construction limits for the permanent structure. No jurisdictional wetlands were found within the project study area. The preferred alternative, Alternative A, may temporarily impact 100 ft of perennial stream channel while the detour structures are in place. E.2. Permits Section 404 of the Clean Water Act - In accordance with Section 404 of the Clean Water Act (33 U.S.C. 1344), a permit is required from the USACE for projects of this type for the discharge of dredge or fill material in "Waters of the United States." The USACE issues two types of permits for these activities. A general permit may be issued on a nationwide or regional basis for a category, or categories, of activities when: those activities are substantially similar in nature and cause only minimal individual or cumulative environmental impacts, or when the general permit would result in avoiding unnecessary duplication of regulatory control exercised by another Federal, state, or local agency provided that the environmental consequences of the action are individually and cumulatively minimal. If a general permit is not appropriate for a particular activity, then an individual permit must be utilized. Individual permits are authorized on a case-by-case evaluation of a specific project involving the proposed discharges. It is anticipated that this project will fall under Nationwide Permit 23, which is a type of general permit. Nationwide Permit 23 is relevant to approved Categorical Exclusions. This permit authorizes any activities, work, and discharges undertaken, assisted, authorized, regulated, funded, or financed, in whole or in part, by another federal agency and that the activity is "categorically excluded" from environmental documentation because it is included within a category of actions which neither individually nor cumulatively have a significant effect on the environment. Activities authorized under nationwide permits must satisfy all terms and conditions of the particular permit. However, final permit decisions are left to the discretionary authority of the USACE. Since the proposed project is located in a designated "Trout" county, the authorization of a nationwide permit by the USACE is conditioned upon the concurrence of the NCWRC. Section 401 Water Quality Certification - A 401 Water Quality Certification, administered through the DWQ, will also be required. This certification is issued for any activity which may result in a discharge into waters for which a federal permit is required. According to the DWQ, one condition of the permit is that the appropriate sediment and erosion control practices must be utilized to prevent exceedences of the appropriate turbidity water quality standard. Tennessee Valley Authority (TVAJ -The proposed project is located in the Tennessee Valley Authority's (TVA) Land Management District. A permit pursuant to Section 26a of the TVA Act is also required for all construction or development involving streams or floodplains in the Tennessee River drainage basin. 14 E.3. Mitigation The USACE has adopted, through the Council on Environmental Quality (CEQ), a wetland mitigation policy which embraces the concept of "no net loss of wetlands" and sequencing. The purpose of this policy is to restore and maintain the chemical, biological, and physical integrity of the waters of the United States, specifically wetlands. Mitigation of wetland impacts has been defined by the CEQ to include: avoiding impacts, minimizing impacts, rectifying impacts, reducing impacts over time, and compensating for impacts (40 CFR 1508.20). Each of these three aspects (avoidance, minimization, and compensatory mitigation) must be considered sequentially. Avoidance -Mitigation by avoidance examines appropriate and practicable measures for averting impact to waters of the United. States. A 1990 Memorandum of Agreement between the Environmental Protection Agency (EPA) and the USACE, states that in determining appropriate and practicable measures to offset unavoidable impacts; such measures should be appropriate to the scope and degree of those impacts and practicable in terms of cost, existing technology, and logistics in light of overall project purposes. The project purpose necessitates traversing Crabtree Creek; therefore, totally avoiding surface water impacts is impossible. Minimization -Minimization of adverse impact to waters of the United States includes examination of appropriate and practicable measures to reduce such impacts. Implementation of these steps will be required through project modifications and permit conditions. Adverse impacts are typically minimized by decreasing the proposed project footprint through reduction of median widths, right-of-way widths, and/or fill slopes. Other practical mechanisms to minimize impacts to waters of the United States include strict enforcement of sedimentation control BMPs for protection of surface waters during the entire life of the project; reduction of clearing and grubbing activity; reduction/elimination of direct discharge into streams; reduction of runoff velocity; reestablishment of vegetation on exposed areas, with judicious pesticide and herbicide management; minimization of instream activity; and litter/debris control. No measures are proposed for this project because there are no jurisdictional wetlands within the project study area. Compensatory Mitigation -Compensatory mitigation, including restoration, creation and enhancement of waters of the United States, is typically not considered unless anticipated impacts to waters of the United States have been avoided and minimized to the maximum extent practicable. Further, it is recognized that "no net loss of wetlands" may not be achievable in every permit action. Therefore, compensatory mitigation is required for unavoidable adverse impacts which remain after all appropriate and practicable minimization measures have been required. Compensatory mitigation is not expected to be required for this project. A final determination regarding mitigation requirements rest with the USACE. 15 F. Protected Species F.1. Federally Protected Species Species with the federal classification of Endangered (E) or Threatened (T), Proposed Endangered (PE), and Proposed Threatened (PT) are protected under provisions of Section 7 and Section 9 of the Endangered Species Act (ESA) of 1973, as amended (16 U.S.C. 1531 et seq.). Table 4 lists the federal protected species for Mitchell County (USFWS list dated February 24, 2003): Table 4 Federally Protected Species Listed for Mitchell County Common Name Scientific Name Status Biolo ical Conclusion Carolina Northern FI in S uirrel Glaucom s sabrinus coloratus E No Effect Indiana Bat M ofis sodalist E No Effect alachian Elktoe Alasmidonta raveneliana E No Effect S ruce-Fir Moss S ider Microhexura monfiva a E No Effect S readin Avens Geum radiafum E No Effect Heller's Blazin Star Liatris helleri T No Effect Blue Rid a Goldenrod Solida o s ithamaea T No Effect Vir inia Spiraea S iraea vir iniana T No Effect Rock Gnome Lichen G mnoderma lineare E No Effect cnaangerea -any native oronce-native species m ganger of exnncnon throughout all or a significant portion of its range. Threatened -any native oronce-native species which is likely to become an endangered species within the foreseeable future throughout all or a significant portion of its range. Carolina Northern Flying Squirrel -The northern flying squirrel is a small nocturnal gliding mammal some 10 to 12 inches in total length and 3 to 5 ounces in weight. It possesses a long, broad, flattened tail (80 percent of head and body length), prominent eyes, and dense, silky fur. The broad tail and folds of skin between the wrist and ankle form the aerodynamic surface used for gliding. Adults are gray with a brownish, tan, or reddish wash on the back, and grayish white or huffy white ventrally. Juveniles have uniform dark, slate-gray backs, and off- white undersides. The northern flying squirrel can be distinguished from the southern flying squirrel by its larger size; the gray base of its ventral hairs as opposed to a white base in the southern species; the relatively longer upper tooth row; and the short, stout baculum (penis bone) of the males. According to Professor Peter D. Weigl of Wake Forest University (1977, and pers. comm., March 2, 1984), the northern flying squirrel occurs primarily in the ecotone, or vegetation transition zone, between the coniferous and northem hardwood forests. Both forest types are used in the search for food, while the hardwood areas are needed for nesting sites. Because of the flying squirrel's small size, the climatic severity of its habitat, and the abundance of avian and mammalian predators, nesting sites represent critical resources. During the cooler months, squirrels commonly occupy tree cavities and woodpecker holes (Jackson, 1961; Baker, 1983), but may also construct and use leaf nests -especially in the summer (Weigl and Osgood, 1974). The interior of both types of nests is lined with lichens, moss, or finely chewed bark. Preliminary results from a study presently underway in West Virginia indicate that these squirrels sometimes enter burrows in the ground, although the extent of their use is not yet known (Urban, pers. comm.). 16 The North Carolina Natural Heritage Program's database of rare species and unique habitats was reviewed in September of 2001. No populations of the species have been recorded in the project vicinity. The project study area was investigated on July 27, 2001. No individual organisms, populations, or suitable habitat were observed within the project study area. BIOLOGICAL CONCLUSION: NO EFFECT Indiana Bat -The Indiana bat is a medium-sized myotis, closely resembling the little brown bay (Myotis lucifugus), but differing in coloration. Its fur is a dull grayfish chestnut rather than bronze, with the basal portion of the hairs of the back dull lead colored. This bat's underparts are pinkish to cinnamon and its hind feet smaller and more delicate than in M. lucifugus. The calcar (heel of the foot) is strongly keeled. Little is known of this bat's. diet beyond the fact that it consists of insects. Females and juveniles forage in the airspace near the foliage of riparian and floodplain trees. Males forage the densely wooded area at tree top height (Laval et al., 1976, 1977). This bat has a definite breeding period that usually occurs during the first ten days of October. Mating takes place at night on the ceilings of large rooms near cave entrances. Limited mating may also occur in the spring before the hibemating colonies disperse. Hibernating colonies disperse in late March and most of the bats migrate to more northern habitat for the summer. However, some males remain in the hibernating area during this period and form active bands, which wander from cave to cave. Limited observations indicate that birth and development occur in very small, widely scattered colonies consisting of 25 or so females and their young. Birth usually takes place during June with each female bearing a single offspring. About 25 to 37 days are required for development to the flying stage and the beginning of independent feeding. Migration to the wintering caves usually begins in August. Fat reserves depleted during migration are replenished largely during the month of September. Feeding continues at a diminishing rate until by late November the population has entered a definite state of hibernation. The hibernating bats characteristically form large, tight, compact clusters. Each individual hangs by its feet from the ceiling. Every eight to ten days hibernating individuals awaken to spend an hour or more flying about or to join a small cluster of active bats elsewhere in the cave before returning to hibernation. Limestone caves are used for winter hibernation, The preferred caves have a temperature averaging 37 to 43 degrees Fahrenheit in midwinter, and a relative humidity averaging 87 percent. Summer records are rather scarce. A few individuals have been found under bridges and in old buildings, and several maternity colonies have been found under loose bark and in the hollows of trees. Summer foraging by females and juveniles is limited to riparian and floodplain areas. Creeks are apparently not used if riparian trees have been removed. Males forage over floodplain ridges and hillside forests and usually roost in caves. Foraging areas average 11.2 acres per animal in midsummer. 17 The North Carolina Natural Heritage Program's database of rare species and unique habitats was reviewed in September of 2001. No populations of the species have been recorded in the project vicinity. The project study area was investigated on July 25, 2001. No individual organisms, populations, or suitable habitat were observed within the project study area. The USFWS has determined that a survey for Myotis sodalist is not required. BIOLOGICAL CONCLUSION: NO EFFECT Appalachian Elktoe -The Appalachian elktoe has a thin, but not fragile, kidney-shaped shell, reaching up to about 3.2 inches in length, 1.4 inches in height, and 1.0 inch in width (Clarke, 1981). Juveniles generally have a yellowish-brown periostracum (outer shell surface) while the periostracum of the adults is usually dark brown to greenish-black in color. Although rays are prominent on some shells, particularly in the posterior portion of the shell, many individuals have only obscure greenish rays. The shell nacre (inside shell surface) is shiny, often white to bluish-white, changing to a salmon, pinkish, or brownish color in the central and beak cavity portions of the shell; some specimens may be marked with irregular brownish blotches (adapted from Clarke, 1981). A detailed description of the species' shell, with illustrations, is contained in Clarke (1981). Ortmann (1921) discussed soft parts. The species has been reported from relatively shallow, medium-sized creeks and rivers with cool, clean, well- oxygenated, moderate- to fast-flowing water. The species is most often found in riffles, runs, and shallow flowing pools with stable, relatively silt-free, coarse sand and gravel substrate associated with cobble, boulders, and/or bedrock. Stability of the substrate appears to be critical to the Appalachian elktoe, and the species is seldom found in stream reaches with accumulations of silt or shifting sand, gravel, or cobble. Individuals that have been encountered in these areas are believed to have been scoured out of upstream areas during periods of heavy rain, and have not been found on subsequent surveys (C. McGrath, personal communication, 1996; J.A. Fridell, personal observation, 1995, 1996, 1999). The North Carolina Natural Heritage Program's database of rare species and unique habitats was reviewed in September of 2001. No populations of the species have been recorded in the project vicinity; however, populations have been reported in the South Toe River Basin. Suitable habitat for the species was observed within portions of the project study area during the initial field investigation. The project study area was visited on August 19, 2002 by NCDOT biologists for habitat evaluation. Crabtree Creek is a high gradient stream which is not typical habitat of the Appalachian elktoe. A mussel survey at this project is not required. BIOLOGICAL CONCLUSION: NO EFFECT Spruce-fir Moss Spider -The spruce-fir moss spider was originally. described by Crosby and Bishop (1925) based on collections made from a mountain peak in western North Carolina in 1923 (Coyle 1981). It is one of the smallest members of the primitive suborder of spiders that are often popularly referred to as "tarantulas" (Harp 1991, 1992). Adults of this species measure only 0.10 to 0.15 of an inch (about the size of a BB) (Coyle 1981). Coloration of the spruce-fir moss spider ranges from light brown to yellow-brown to a darker reddish brown, and there are no markings on its abdomen (Harp, 1991, 1992). The most reliable field identification characteristics for the spruce-fir moss spider are chelicerae that project forward well beyond the anterior edge of the carapace, a pair of very long posterior spinnerets, and the presence of a second pair of book lungs, which appear as light patches posterior to the genital furrow (Harp, 1992), 18 The spruce-fir moss spider is known only from Fraser fir and red spruce forest communities of the highest elevations of the southern Appalachian Mountains in western North Carolina and eastern Tennessee (Coyle, 1981, 1997, 1999; Harp, 1991, 1992). The typical habitat of this spider is found in damp, but well drained, moss mats growing on rock outcrops and boulders in well-shaded situations within these forests (Coyle, 1981, 1997, 1999; Harp, 1992). The moss mats cannot be too dry (the species is very sensitive to desiccation) or too wet (large drops of water can also pose a threat to the spider). The spider constructs tube-shaped webs in the interface between the moss mat and rock surface. There is no record of prey having been found in the webs of the spruce-fir moss spider, nor has the species been observed taking prey in the wild, but the abundant springtails (collembolans) in the moss mats provide the most likely source of food for the spider (Coyle, 1981; Harp, 1992). The North Carolina Natural Heritage Program's database of rare species and unique habitats was reviewed in September of 2001. No populations of the species have been recorded in the project vicinity. The project study area was investigated on July 27, 2001. No individual organisms, populations, or suitable habitat were observed within the project study area. Elevations within the project study area range from approximately 2,940 to 3,000 ft. All known populations occur at elevations at and above 5,400 ft in elevation. BIOLOGICAL CONCLUSION: NO EFFECT Spreading Avens -Spreading avens is a perennial herb. Spreading avens is topped with an indefinite cyme of large, bright yellow flowers. Its leaves are mostly basal with large terminal lobes and small laterals, and they arise from horizontal rhizomes. Plant stems grow 7.9 to 19.7 inches tall. Flowering occurs from June through September, and the fruits (achenes) are produced from August through October. The species inhabits high elevation cliffs, outcrops, and steep slopes that are exposed to full sun. The adjacent spruce/fir forests are dominated by red spruce (Picea rubens) and a federal candidate species, Fraser fir (Abies frasen). Heller's blazing star (Liatris helleri) and/or Blue Ridge goldenrod (Solidago spithamaea), both federally- listed as threatened species, are also present at some sites. The substrate at all the population sites is composed of various igneous, metamorphic, and metasedimentary rocks (Massey, et al., 1980; Morgan, 1980; Kral, 1983; Department of the Interior, 1990). The North Carolina Natural Heritage Program's database of rare species and unique habitats was reviewed in September of 2001. No populations of the species have been recorded in the project vicinity. The project study area was investigated on July 27, 2001. No individual organisms, populations, or suitable habitat were observed within the project study area. Elevations within the project study area range from 2,850 to 2,880 ft msl. These elevations are below the range of 4,200 to 6,300 ft for known populations. BIOLOGICAL CONCLUSION: NO EFFECT Heller's Blazing Star - Heller's blazing star is a perennial herb that has one or more erect or arching stems arising from a tuft of narrow pale green basal leaves. Its stems reach up to 1.3 ft in height and are topped by a showy spike of lavender flowers, which are 2.8 to 7.9 inches long (Porter, 1891). Its flowering season lasts from July through September, and its fruits are present from September through October (Kral, 1983; Radford et al., 1964). This plant is differentiated from other similar high altitude Liatris species by a much shorter pappus, ciliate 19 petioles, internally pilose corolla tubes, and a lower, stockier habit (Cronquist, 1980; Gaiser, 1946). Work is being conducted on populations in two locations, which may result in their being reclassified as a new taxon (Sutter, in preparation). If so, these plants will remain protected under the Endangered Species Act. The plant exists on high elevation ledges of rock outcrops in shallow, acid soils, which are exposed to full sunlight. The North Carolina Natural Heritage Program's database of rare species and unique habitats was reviewed in September of 2001. No populations of the species have been recorded in the project vicinity. The project study area was investigated on July 25, 2001. No individual organisms, populations, or suitable habitat were observed within the project study area. Elevations within the project study area range from approximately 2,940 to 3,000 ft msl. These elevations are below the range of 3,500 to 6,000 ft for known populations. Consequently, the biological conclusion for Liatris helleri is "No Effect". BIOLOGICAL CONCLUSION: NO EFFECT Blue Ridge Goldenrod - An erect perennial herb with stems 4 to 16 inches tall arising from a short, stout rhizome. The yellow flowers are borne in heads arranged into a corymbiform inflorescence. Flowering occurs during July and August. Blue Ridge goldenrod habitat is found at elevations above 4,600 ft. The plant is considered an early pioneer species and is found growing in full sun in the crevices of granite outcrops. The North Carolina Natural Heritage Program's database of rare species and unique habitats was reviewed in September of 2001. No populations of the species have been recorded in the project vicinity. The project study area was investigated on July 25, 2001. No individual organisms, populations, or suitable habitat were observed within the project study area. Elevations within the project study area range from approximately 2,940 to 3,000 ft msl. Blue Ridge goldenrod habitat is found at elevations above 4,600 ft. Consequently, the biological conclusion for Solidago spithamaea is "No Effect". BIOLOGICAL CONCLUSION: NO EFFECT Virginia Spiraea -Virginia spiraea bears cream-colored flowers on branched and flat-topped axles. This shrubby plant grows from 2.0 to 10.0 ft tall and has arching, upright stems. Its alternative leaves are of different sizes and shapes. Spiraea spreads clonally and forms dense clumps, which spread in rock crevices and around boulders. Flowering occurs in June and July. Virginia spiraea is unique because it occurs along rocky, flood-scoured riverbanks in gorges or canyons. Although it is an unusual requirement, flood scouring is essential to this plant's survival because it eliminates taller woody competitors and creates riverwash deposits and early successional habitats. These conditions are apparently essential for this plant's colonization of new sites (Rawinski, 1988). Spiraea is found in thickets. Common woody vine associates include fox grape; summer grape; riverbank grape; winter grape; graybark or pigeon grape; possum grape; sand grape; and muscadine or scuppernong. Other plant associates include royal fern, yellow ironweed or wing-stem; ninebark; smooth alder or brookside alder; silky cornet or kinnikinnik; and shrubby yellow root (Parkin, U.S. Fish antl Wildlife, personal communication, 1990). The bedrock surrounding 20 spiraea habitat is primarily sandstone and soils are acidic and moist. Spiraea grows best in full sun, but it can tolerate some shade (Technical Bulletin, 1990). One population in West Virginia inhabits a disturbed wetland habitat near a road (Rawinski, 1988). The North Carolina Natural Heritage Program's database of rare species and unique habitats was reviewed in September of 2001. No populations of the species have been recorded in the project vicinity. The project study area was investigated on July 27, 2001 and June 12, 2003. No individual organisms, populations, or suitable habitat were observed within the project study area. BIOLOGICAL CONCLUSION: NO EFFECT Rock Gnome Lichen -Rock gnome lichen is a squamulose lichen in the reindeer moss family. This species is the only member of its genus occurring in North America. It occurs in rather dense colonies of narrow straps (squamules). The only similar lichens are the squamulose lichens of the genus Cladonia. Rock gnome lichen has terminal portions of the strap like individual lobes that are blue-gray on the upper surface and generally shiny-white on the lower surface; near the base they grade to black (unlike squmulose Cladonia, which are never blackened toward the base). The squamules are about 0.04 inch across near the tip, tapering to the blackened base, sparingly and subdichotomously branched, and generally about 0.4 to 0.8 inch long, although they can vary somewhat in length, depending upon environmental factors. The squamules are nearly parallel to the rock surface, but the tips curl away from the rock, approaching or reaching a perpendicular orientation to the rock surface. The fruiting bodies (apothecia) are borne at the tips of the squamules and are black (contrasting to the brown or red apothecia of Cladonia species). The apothecia are borne singly or in clusters, usually at the tips of the squamules but occasionally along the sides; these have been found from July through September. The apothecia are either sessile or borne on short podetia 0.04 to 0.08 inch with most being much smaller. The apothecia are cylindrical in shape and radial in symmetry. The primary means of propagation of this lichen appears to be asexual, with colonies spreading clonally. Rock gnome lichen occurs only in areas of high humidity, either at high elevations, where it is frequently bathed in fog, or in deep river gorges at lower elevations. It is primarily limited to vertical rock faces where seepage water from forest soils above the cliffs flows at (and only at) very wet times. Most populations occur above an elevation of 5,000 ft. The North Carolina Natural Heritage Program's database of rare species and unique habitats was reviewed in September of 2001. No populations of the species have been recorded in the project vicinity. The project study area was investigated on July 27, 2001. No individual organisms, populations, or suitable habitat were observed within the project study area. Elevations within the project study area range from 2,850 to 2,880 ft msl. Most known populations are above 5,000 ft. BIOLOGICAL CONCLUSION: NO EFFECT F.2. Federal Species of Concern Federal Species of Concern (FSC) are not afforded federal protection under the Endangered Species Act and are not subject to any of the provisions included in Section 7 until they are formally proposed or listed as Threatened or Endangered. In addition to the federal program, organisms that are listed as Endangered (E), Threatened (T), 2? or Special Concern (SC) by the North Carolina Natural Heritage Program (NCNHP) on its list of Rare Plants and Animal Species are afforded state protection under the N.C. State Endangered Species Act and the N.C. Plant Protection and Conservation Act of 1979. Table 5 lists Federal Species of Concern for Mitchell County, the state status of these species, and the potential for suitable habitat in the project study area. The NCNHP database shows no occurrences of FSC within 0.6 mile of the project study area as of January 2001. 22 Table 5 Federal Species of Concern (FSC) for Mitchell County Common Name Scientific Name Potential Habitat State Status Alle hen Woodrat Neofoma ma ister No SC A palachian Cottontail S Ivila us obscurus Yes --- Blotched Chub Erim stax insi nis Yes SR Southern A alachian Saw-whet Owl Ae olius acadicus No SC Olive-sided FI catcher Contopus borealis No SC Shar head Darter Etheostoma acuficeps Yes T Southern A alachian Red Crossbill Loxia curvirosfra No SR S. A alachian Black-ca ed Ckickadee Parus atrica ullus racticus Yes SC S. A alachian Yellow-bellied Sa sucker S h ra icus varius a palaciensis Yes SR Olive Darter Percina s uamata Yes SC Roan Supercoil Paravitrea varidens Yes T Diana Fritilla Butterfl Spe eria diana Yes SR Fraser Fir Abies fraseri No --- Roan's False Goat's Beard Asfilbe crenatiloba Yes C Mountain Bittercress Cardamine clematitis No SR Piratebush Buckle a disticho h Ila Yes E Roan Sed e Carex roanensis Yes C Tall Larkspur Delphinium exaltatum No E-SC Glade spur e Eu horbia purpurea Yes C Bent Avens Geum eniculatum Yes T Butternut Ju lans cinerea Yes --- Gra 's Lil Lilium ra i No T-SC Canb 's Mountain Lover =cliff reen Paxistima canb i No --- ALiverwort Pla iochila sullivantii var. sullivantii No C A Liverwort S henolobopsis earsonii No PE Endangered (E) -any native oronce-native species in danger of extinction throughout all or a significant portion of its range. Threatened (T) -any native oronce-native species which is likely to become an endangered species within the foreseeable future throughout all or a significant portion of its range. Special Concern (SC) -any species which requires monitoring but which may be collected and sold under specific regulations. Candidate(C) - a species for which USUSFWS has enough information on file to support proposals for listing as endangered or threatened. Significantly Rare(SR) -species which are very rare, generally with 1-20 populations in the state, and generally reduced in numbers by habitat destruction. Proposed Endangered (PE) - a species which has been formally proposed for listing as endangered, but has not yet completed the legally mandated listing process. 2? F.3. Summary of Anticipated Impacts The proposed project is not anticipated to impact any threatened or endangered species. VI. CULTURAL RESOURCES A. Compliance Guidelines This project is subject to compliance with Section 106 of the National Historic Preservation Act of 1966, as amended, implemented by the Advisory Council on Historic Preservation's Regulations for Compliance with Section 106, codified at 36 CFR Part 800. Section 106 requires Federal agencies to take into account the effect of their undertakings (federally funded, licensed, or permitted) on properties listed in or eligible for inclusion in the National Register of Historic Places and to afford the Advisory Council on Historic Preservation a reasonable opportunity to comment on such undertakings. This project has been coordinated with the North Carolina State Historic Preservation Officer (SHPO) in accordance with the Advisory Council's regulations and FHWA procedures. B. Historic Architecture A field survey of the Area of Potential Effect (APE) was conducted on November 13, 2002. All structures within the APE were photographed, and later reviewed by the State Historic Preservation Office (HPO). In a concurrence form dated March 18, 2003, the SHPO concurred that there are no historic architectural resources either listed in or eligible for listing in the National Register of Historic Places within the APE. A copy of the concurrence form is included in the Appendix. C. Archaeology The SHPO, in a memorandum dated January 29, 2002, recommended that "no archaeological investigation be conducted in connection with this project." A copy of the SHPO memorandum is included in the Appendix. VII. ENVIRONMENTAL EFFECTS The project is expected to have an overall positive impact. Replacement of the inadequate bridges will result in safer traffic operations. The project is considered a Federal "Categorical Exclusion" due to its limited scope and lack of substantial environmental consequences. Replacement of Bridge Nos. 109 and 110 will not have an adverse effect on the quality of the human or natural environment with the use of the current North Carolina Department of Transportation standards and specifications. The project is not in conflict with any plan, existing land use, or zoning regulation. No change in land use is expected to result from the construction of the project. No adverse impact on families or communities is anticipated. Right-of-way acquisition will be limited. No relocatees are expected with implementation of the proposed alternative. 24 No adverse effect on public facilities or services is expected. The project is not expected to adversely affect social, economic, or religious opportunities in the area. In compliance with Executive Order 12898 (Federal Actions to Address Environmental Justice in Minority Populations and Low Income Populations) the project would not disproportionately impact any minority or low- income populations. The studied route does not contain any bicycle accommodations, nor is it a designated bicycle route; therefore, no bicycle accommodations have been included as part of this project. This project has been coordinated with the United States Department of Agriculture, Natural Resources Conservation Service. The Farmland Protection Policy Act requires all federal agencies or their representatives to consider the potential impact to prime farmland for all land acquisition and construction projects. The proposed project involves replacing the bridges in their existing locations; therefore, no impacts to prime or locally important farmland are anticipated. No publicly owned parks or recreational facilities, wildlife and waterfowl refuges, or historic sites of national, state or local significance in the immediate vicinity of the project will be impacted. The proposed project will not require right-of-way acquisition or easement from any land protected under Section 4(f) of the Department of Transportation Act of 1966. No adverse effects to air quality are anticipated from this project. This project is an air quality "neutral" project, so it is not required to be included in the regional emissions analysis and a project level CO analysis is not required. Since the project is located in an attainment area, 40 CFR Part 51 is not applicable. If vegetation or wood debris is disposed of by open burning, it shall be done in accordance with applicable local laws and regulations of the North Carolina State Implementation Plan (SIP) for air quality in compliance with 15 NCAC 2D.0520 and 1990 Clean Air Act Amendments and the National Environmental Policy Act. This evaluation completes the assessment requirements for air quality, and no additional reports are required. Ambient noise levels may increase during the construction of this project; however this increase will be only temporary and usually confined to daylight hours. There should be no notable change in traffic volumes after this project is complete. Therefore, this project will have no adverse effect on existing noise levels. Noise receptors in the project area will not be impacted by this project. This evaluation completes the assessment requirements for highway noise set forth in 23 CFR Part 772. No additional reports are required. The NCDOT Geotechnical Unit determined that no underground storage tanks or areas of other contamination were present at or near the project study area. Mitchell County is a participant in the Federal Flood Insurance Regular Program. The project is not located within an Approximate or Detailed Study Area. Since the proposed structures will be similar in waterway opening size, it is not anticipated that they will have any significant adverse impact on the existing floodplain and floodway. The approximate 100-year floodplain in the project study area is shown in Figure 9. Geotechnical borings for the bridge foundation will be necessary. 25 Based on the above discussion, it is concluded that no substantial adverse environmental impacts will result from the replacement of Bridge Nos. 109 and 110. VIII. PUBLIC INVOLVEMENT Due to the isolated nature of this bridge replacement project, no formal public involvement program was initiated. Efforts were undertaken early in the planning process to contact local officials to involve them in the project development with a scoping letter. IX. AGENCY COMMENTS Agency comments are summarized below. Letters from the commenting agencies are included in the appendix. North Carolina Wildlife Resources Commission (NCWRC): Potential for fish spawning moratorium for May 1 through July 15 to prevent off-site sedimentation from impacting fish eggs and fry downstream of the site. Response: The NCDOT will observe a moratorium on in-water work between May 1 to July 15 to protect fish spawning. 26 X. REFERENCES Cowardin, Lewis M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of Wetlands and Deepwater Habitats of the United States. U.S. Fish and Wildlife Service. U.S. Government Printing Office, Washington D.C. Martof, B.S., W.M. Palmer, J.R. Bailey, and J.R. Harrison III. 1980. Amphibians and Reptiles of the Carolinas and Virginia. The University of North Carolina Press. Chapel Hill, North Carolina. 264pp. North Carolina Department of Environment and Natural Resources, Division of Water Quality. 2000a. Watershed Restoration Action Strategy. (as revised through 2 February 2000) Raleigh, North Carolina North Carolina Department of Environment and Natural Resources, Division of Water Quality, Basinwide Planning Program. 2000b. French Broad River: Basinwide Water Quality Management Plan (May 2000). http://h2o.enr.state.nc.us/basinwide/french/frenchbroad wg management plan.htm. North Carolina Department of Environment and Natural Resources, Division of Water Quality. 20041 The North Carolina Integrated Report [the 305(b) and 303(d) Report) (Final report 2002 and Draft report April 2004) http://h2o.enr.state.nc.us/tmdl/General 303d.htm North Carolina Department of Environment and Natural Resources. 2001. Basinwide Information Management System. North Carolina Waterbodies Reports: French Broad River. Accessed 10 September 2001. http://h2o.enr.state.nc.us/bimslreports/basinsandwaterbodies/hydro/French Broad.pdf. North Carolina Department of Environment, Health, and Natural Resources. 1993. Classifications and Water Quality Standards for North Carolina River Basins. Division of Environmental Management. Raleigh, North Carolina. North Carolina Department of Environment, Health, and Natural Resources, Division of Environmental Management, Water Quality Section. 1995. Guidance for Rating the Values of Wetlands in North Carolina, Fourth Version. North Carolina Department of Transportation. 1997. Best Management Practices for Protection of Surface Waters. North Carolina Natural Heritage Program. 1999. Natural Heritage Program List of the Rare Animal Species of North Carolina. Raleigh, North Carolina. North Carolina Natural Heritage Program. 1999. Natural Heritage Program List of the Rare Plant Species of North Carolina. Raleigh, North Carolina. North Carolina Natural Heritage Program. 2001. ~ Element Occurrence Search Report: Mitchell County, North Carolina. http:l/www.ncsparks.net/nhp/search.html. Updated July 2001. Potter, E.F., J.F. Parnell, and R.P Teulings. 1980. Birds of the Carolinas. The University of North Carolina Press. Chapel Hill, North Carolina. 27 Radford, A.E., H.E. Ahles, and C.R. Bell. 1987. Manual of the Vascular Flora of the Carolinas. University of North Carolina Press. Chapel Hill, North Carolina. Rohde, F.C., R.G. Arndt, D.G. Lindquist, and J.F. Parnell. 1994. Freshwater Fishes of the Carolinas, Virginia, Maryland, and Delaware. The University of North Carolina Press. Chapel Hill, North Carolina. Schafale, M.P. and A.S. Weakley. 1990. Classification of the Natural Communities of North Carolina: Third Approximation. North Carolina Natural Heritage Program, Division of Parks and Recreation, NCDEHNR. Raleigh, North Carolina. U.S. Army Corps of Engineers. 1987. Corps of Engineers Wetlands Delineation Manual. Technical Report Y-87-1. Environmental Laboratory, Vicksburg, Mississippi. U.S. Army Corps of Engineers. 1992. Clarification and Interpretation of the 1987 Manual. Memo to USACE districts from Headquarters, US Army Corps of Engineers, Washington, DC, 6 Mar 1992, signed by MG Arthur E. Williams, Directorate of Civil Works. U.S. Department of Agriculture, Natural Resources Conservation Service and the National Technical Committee for Hydric Soils. 1996. NRCS National Hydric Soils List. U.S. Department of Agriculture, Natural Resources Conservation Service. Official Soil Series Descriptions (OSD). Accessed 15 October 2001. http://www.statlab.iastate.edu/soils/osd. U.S. Department of Agriculture, Natural Resources Conservation Service. Updated through August 2001. Soil Survey of Mitchell County, North Carolina. (unpublished). U.S. Fish and Wildlife Service. 1995. National Wetlands Inventory Map, Celo 7.5-minute Quadrangle, North Carolina. U.S. Fish and Wildlife Service. 1995. National Wetlands Inventory Map, Little Switzerland 7.5-minute Quadrangle, North Carolina. U.S. Fish and Wildlife Service, Region 4: Southeast Region, North Carolina Ecological Services. 2001. Threatened and Endangered Species in North Carolina: Mitchell County. Updated 22 March 2001. http:l/nc-es.fws gov/es/countyfr.html U.S. Geological Survey. 1994. Celo, North Carolina, Topographic Quadrangle (7.5-minute series). U.S. Geological Survey. 1994. Little Switzerland, North Carolina, Topographic Quadrangle (7.5-minute series). Webster, W.D., J.F. Parnell, and W.C. Biggs. 1985. Mammals of the Carolinas, Virginia, and Maryland. The University of North Carolina Press. Chapel Hill, North Carolina. 28 FIGURES ~ ~--.,,: ,,,~ NORTH CAROLINA DEPARTMENT OF TRANSPORTATION SR 1002 Replace Bridge Nos.109 ~ 110 over Crabtree Creek Mitchell County, North Carolina TIP NO. B-4202 PROJECT VICINITY MAP Not to Scale FIGURE 1 Looking South across Bridge No. 109 ~a ~,~. ~ ~ a ~. ,x k• x. ,. P° '~ s ~ :.~, a .~ .+~rk Looking West at Bridge No. 109 ~= °-*:.`ri, N®RTH CAR®L{ ~~~ ~ ~ ~~~ DEPARTMENT OF TRANSPORTATION ~~ _ ` ,, Looking North across Bridge No. 110 Looking South across Bridge No. 110 -_ NORTH CAROLi 6- a ~` DEP ENT OFT SOTTION