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20181349 Ver 1_Mitigation Plan_20181015
Action History (UTC -05:00) Eastern Time (US & Canada) Submit by Anonymous User 10/15/2018 3:48:59 PM (Message Start Event) Approve by Montalvo, Sheri A 10/16/2018 8:51:16 AM (Initial Review- Sheri Montalvo) The task was assigned to Montalvo, Sheri A 10/15/2018 3:49 PM ID#* 20181349 Version* 1 Select Reviewer:* Mac Haupt Mitigation Project Submittal -10/15/2018 Type of Mitigation Project:* V Stream r Wetlands r— Buffer r— Nutrient Offset (Select all that apply) Is this a Prospectus, Technical Proposal or a New Site?* r Yes r No Project Contact Information Contact Name:* Paul Wiesner Project Information Email Address:* paul.Wesner@ncdenr.gov Existing 20181349 Existing 1 (DWR) (nurrbersonly ... nodash) Version:* (nurrbersonly) I D#: * Project Name:* Mill Dam Creek Restoration Project (DMS# 97136) County:* Yadkin Document Information Mitigation Document Type:* Mitigation Plan File Upload: Mill Dam Cr_97136_Draft Mit Plan (IRT)_Oct. 33.48MB 2018.pdf Rease upload only one RDF of the conplete file that needs to be subrritted... Signature Print Name:* Paul Wiesner Signature:* MITIGATION PLAN FINAL Mill Dam Creek Restoration Site Yadkin County, North Carolina DMS Project Number 97136 DEQ Contract 6898 SAW‐2016‐01335 FULL‐DELIVERY PROJECT Yadkin River Basin Cataloging Unit 03040101 Prepared for: NC Department of Environmental Quality Division of Mitigation Services 1652 Mail Service Center Raleigh, NC 27699‐1652 September 25, 2018 Prepared by: KCI Associates of North Carolina, PC 4505 Falls of Neuse Rd, Suite 400 Raleigh, NC 27609 (919) 783‐9214 KCI Project Staff: Tim Morris, Alex French, Adam Spiller, Joe Sullivan, and Kristin Knight‐Meng This mitigation plan has been written in conformance with the requirements of the following: Federal rule for compensatory mitigation project sites as described in the Federal Register Title 33 Navigation and Navigable Waters Volume 3 Chapter 2 Section § 332.8 paragraphs (c)(2) through (c)(14). NCDEQ Division of Mitigation Services In‐Lieu Fee Instrument signed and dated July 28, 2010 These documents govern NCDMS operations and procedures for the delivery of compensatory mitigation. Date: 9/26/2018 To: Matthew Reid, Project Manager From: Tim Morris, Project Manager KCI Associates of North Carolina, P.A. Subject: Mill Dam Restoration Site Draft Mitigation Plan Review Yadkin River Basin ‐ 03040101 Yadkin County, North Carolina Contract No. #6898 DMS Project #97136 Dear Mr. Reid, Please see below our responses to your comments from August 7, 2018 on the draft of the Mill Dam Mitigation Plan. We have addressed your comments in the final report and have outlined our changes below. Following your acceptance of these changes, we will submit 3 hard copies of the final report along with a flash drive or CD with an electronic copy. Page ii: There are two tables labeled Table 6 in the document. One is the Local Curve Bankfull Determination and the second is Sediment Results and Shear Stress Comparison. Please update document. Corrected. Page 6: The Slate Belt reference (possibly from a relic document) needs to be corrected. The project appears to be in the Sauratown Mountains Anticlinorium. Please verify the geologic setting and provide an updated description. We corrected it to the Sauratown Mountains Anticlinorium, although the Metagraywacke and Muscovite‐Biotite Schist formation is correct. Page 6: Last paragraph references (see Figure 3). This reference should be (see Figure 4). Corrected. Page 8: Second paragraph references (Figures 5a and 5b). This reference should be (Figures 6a and 6b). Corrected. Page 13: Second paragraph states UTHC3 begins after T6 confluence. According to plan sheets, asset table and figures, this confluence is before T6 confluence. Please update text. This has been corrected as UTHC3 beginning approximately 70 linear feet upstream of the confluence with T6. Table 4: Please add the thermal regime to the attribute table. The regime “warm” has been added to the attribute table. Figure 7: One XS on UTHC3 does not seem adequate coverage for making the R justification based on IRT concerns during the Post Contract Site Meeting. Please include more robust documentation of the dominant condition of that reach to satisfy IRT concerns. Field observations on 7/26/2018 indicate poor floodplain connectivity and bank erosion as per KCI assessment. There was evidence of some sediment sorting and minimal habitat, but the channel is largely oversized in that reach. DMS recommends adding cross sections and/or providing the proportions of incision/erosion for the reach. Please elaborate as necessary in plan to justify the R approach. We added two more cross‐sections along UTHC3 that are included in the morphological data tables and the existing conditions data in Section 12.2. In addition, we have added more description to Section 3.1.3 in the UTHC3 paragraph. Figure 8: UTHC4 start location is shown at utility break. According to asset table and plan sheets, this section is in UTHC3. Please update start location of UTHC4 for clarity. Also, symbolizing culverts, bridges and utility crossings would be beneficial for reviewing since there are many breaks in the easement. The start of UTHC4 has been corrected in this figure, and we’ve added the locations of the different types of crossings on Figure 8. Page 21: Photo 17 refers to UTHC5 and Photo 18 refers to UTHC‐ . Please update. These have been corrected to UTHC4 (however, since 6 new photos of T5A and UTHC3 were added, these photos are now 23 and 24). Page 23: It is advisable to provide an actual proportion of the drainage network captured by the project given how high it is. This combined with the implementation of RSC on ephemeral sediment sources needs to be emphasized given that some of the E2 on the project consists of planting and cattle exclusion only with some of the E1 limited to benching and planting at normal credit ratios. Making the system wide benefits of the percentage of watershed capture and RSC implementation will help allay some of the reach by reach concerns expressed by the IRT in the memo regarding the level of intervention, uplift and crediting. In the last paragraph in Section 4.0, we have added that approximately 89% of the jurisdictional features within the project watershed are protected. In addition, another 1,852 linear feet of ephemeral features are protected in the project easement, of which 3 RSCs are included to improve water quality. Page 25: Typo end of second sentence. Corrected. Page 26: T2 and T4 both have RSCs at the top of the reach. According to the Project Asset Table and plan sheets, credit is being requested for these areas. Please verify ALL RSCs on the Site are not being installed in jurisdictional streams and credit calculations do not include RSC length. We have removed the RSCs from T2 and T4, but left the remaining three. The treatment for the tops of T2 and T4 will still involve stabilizing the stream bed and banks, but will no longer include the water quality treatment cells found in RSCs. The credit table has been kept the same assuming the level of treatment corresponds to the previously proposed credit ratios. Table 21: Please create discrete Reach IDs in the table for any current reach where restoration levels or ratios vary throughout reach (ex: break T2 up into T2R1 and T2R2 for the EII and R sections). These have been added to the mitigation plan and to the construction plans. Table 21: T5A is an ephemeral feature. Credit will likely not be granted for work on this channel. Please provide justification and IRT concurrence that this reach has been approved as a creditable reach. Please update plan as needed. T5A was flowing strongly at the time when the original stream form was completed, but scored lower due to other soil and biological elements and valley grade not being included at the time in January 2016. A new stream form was completed in August 2018 based on further observations of the stream and it scored a 19.25. T5A also had flow at the time the IRT conducted the post‐contract site visit in July 2016. The Corps had a concern that the flow could be from a leaky well, but upon checking with the landowner and opening the spring box KCI confirmed that the flow emanates from a strong artesian spring that initiates the channel flow. Because the stream originally scored below 19, it was initially categorized as ephemeral; however, the stream contains perennial flow and always has. The IRT was comfortable with the call of E2 for this channel if the well issue was reconciled. Additional photos have been included in the mitigation plan. Page 44: o Stream Hydrologic Performance: Please elaborate on baseflow criterion referencing 3 out of first 4 years. Given some of the elevation changes planned for some of these tribs it might be better to indicate 3 of the last 4 years instead. Where did this criterion come from? The 3 out of the first 4 years came from a DWR comment on a different mitigation plan. We have removed this reference, and will see if the IRT has additional comments on this section. o Geomorphology Performance: Recommend adding a sentence after the BHR criterion indicating that annual success will be an overall assessment for the reach to distinguish local from systemic concerns. Also, there are other criteria in the 2016 IRT guidance not addressed here. We have added a sentence after the BHR stating “There will be an overall assessment for each reach to distinguish localized versus systemic concerns for that stream.” We state at the beginning of the section that the Geomorphology Performance will follow the 2016 IRT guidance and as such have not listed all the parameters. Page 45: o Veg Monitoring top paragraph: This statement seems to be in error “In all plots exotic and invasive species will be included in the stem count”. Please clarify to make sure the reader understands that they will be counted, but excluded from success densities. Please indicate whether fixed plots will be CVS plots. We intended to state that we would be counting exotic and invasive stems, but not including them in the performance criterion. This has been reworded to “In all plots, invasive stems will also be recorded to determine the percentage of invasive stems present.” The fixed plots will not be CVS plots, but will follow the guidelines in the 2016 IRT guidance. O Geomorphology: Given the restrictive geomorphology success criteria and nearly 10,000 feet of R/EI spread over about 15 reaches DMS recommends having more riffle cross sections over pools. We have changed the distribution of cross‐sections to 24 riffles and 8 pools instead of 16 of each. They are distributed as: UTHC1 Top (2 riffles and 1 pool), UTHC1 Bottom (1 riffle and 1 pool), UTHC2 (2 riffles), UTHC3 (2 riffles and 1 pool), UTHC4‐1 (1 riffle), UTHC4‐3 (2 riffles), T1 (1 riffle and 1 pool), T1A (2 riffles), T2‐2 (1 riffle and 1 pool), T3 (1 riffle and 1 pool), T4 (1 riffle), T6‐2 (1 riffle and 1 pool), T6A‐2 (1 riffle), T7‐2 (1 riffle and 1 pool), T8‐2 (2 riffles), T8A (2 riffles), and T9 (1 riffle). We added a statement saying “More riffle cross‐sections will be used given the amount of Enhancement I reaches on the project.” Credit Release Schedule: Typo in bullet c. Corrected. Maintenance Plan: Please add beaver control to Planned Maintenance. We added a beaver control section that states that “The site will be monitored for the presence of beaver. Adaptive management approaches will be used to evaluate whether or not beaver or their structures should be controlled at the site.” Jurisdictional Determination: The Preliminary JD material included in the draft plan does not include all the information submitted to the USACE. Maps, figures and tables are missing. Please include entire JD submittal package in the Mitigation Plan. These materials have been added to the appendix. Please include Post Contract Site Meeting Memo in appendix. The meeting minutes from 7/19/16 are included now in Section 12.11 Agency Correspondence in the appendices. Plan Sheet Comments: Step Pool Detail: Consider angling head sill to direct flow away from outer bend. DMS will defer to KCI experience with prior performance of this design. The detail has been updated to show an angled sill at approximately 8 degrees to direct flow away from the outer bank. Typical Sections: XS appear to be for P2 designs. How much P2 is in the design as a proportion? We generally show a typical cross‐section that shows a potential tie‐out for P2 approach if needed; assuming there is a floodplain present for a P1 approach, the grade can simply be tied out at the existing elevation. There are floodplain extents shown in the planview that outline where the stream floodplain narrows or widens for a P2 versus P1 approach. Below is the approximate break‐ down of Priority 2 areas. Over all of the 13,506 lf of proposed stream channel, Priority 2 will occur on approximately 3,028 lf, or 22%. Reach Begin End Description UTHC 1 10+00 11+50 tie‐in UTHC 1 24+50 27+39 tie‐out UTHC 3 42+30 44+00 tie‐in UTHC 3 53+50 55+57 tie‐out Trib 1 100+00 101+80 tie‐in Trib 1 105+20 107+51 tie‐out Trib 1A 150+00 157+95 all Trib 2 200+00 207+63 all Trib 3 varies throughout Trib 9 900+71 901+29 tie‐out RSC Detail: DMS has noted on some other RSC designs that a clay layer between the media and the next cascade has been used to promote saturation of the media and make certain that flow is restricted to the sill elevation and not piping beneath. Given how much reach 1A for example will have to be raised as part of the restoration DMS wants to make sure that everything possible is being done to maintain RSC flow elevation as high as possible from the outset. DMS will defer to KCIs expertise if their experience with this design leaves them confident that the fabric will do the job. We have modified the RSC detail to show the addition of a 1’‐thick layer of clay behind the boulder sill. There is also a layer of geotextile fabric in between that layer and the boulders. Please contact me if you have any questions or would like clarification concerning these responses. Sincerely, Tim Morris Project Manager Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 i TABLE OF CONTENTS 1.0 PROJECT INTRODUCTION .................................................................................................................. 1 2.0 WATERSHED APPROACH AND SITE SELECTION ................................................................................ 3 3.0 BASELINE AND EXISTING CONDITIONS ............................................................................................. 6 3.1 Watershed Processes and Resource Conditions ........................................................................... 6 3.1.1 Landscape Characteristics ..................................................................................................... 6 3.1.2 Land Use/Land Cover and Chronology of Impacts ................................................................ 8 3.1.3. Watershed Disturbance and Response ............................................................................... 12 3.1.4 Site Photographs ................................................................................................................. 19 4.0 FUNCTIONAL UPLIFT POTENTIAL .................................................................................................... 24 5.0 MITIGATION PROJECT GOALS AND OBJECTIVES ............................................................................. 25 6.0 DESIGN APPROACH AND MITIGATION WORK PLAN ....................................................................... 25 6.1 UT Hall Creek (UTHC) .................................................................................................................. 26 6.2 Tributaries 1 and 1A .................................................................................................................... 27 6.3 Tributary 2 ................................................................................................................................... 27 6.4 Tributary 3 ................................................................................................................................... 27 6.5 Tributary 4 ................................................................................................................................... 27 6.6 Tributaries 5, 5A, and 5B ............................................................................................................. 27 6.7 Tributaries 6 and 6A .................................................................................................................... 28 6.8 Tributary 7 ................................................................................................................................... 28 6.9 Tributaries 8 and 8A .................................................................................................................... 28 6.10 Tributary 9 ................................................................................................................................... 28 6.11 Regenerative Stormwater Conveyances .................................................................................... 28 6.12 Crossings ..................................................................................................................................... 29 6.13 Design Determination ................................................................................................................. 31 6.14 Sediment ..................................................................................................................................... 32 6.15 Morphological Essential Parameters Tables ............................................................................... 34 6.16 Planting ....................................................................................................................................... 41 6.17 Project Assets .............................................................................................................................. 41 7.0 PERFORMANCE STANDARDS ........................................................................................................... 45 8.0 MONITORING PLAN......................................................................................................................... 45 9.0 ADAPTIVE MANAGEMENT PLAN ..................................................................................................... 49 10.0 LONG‐TERM MANAGEMENT PLAN ................................................................................................. 49 11.0 REFERENCES CITED .......................................................................................................................... 50 12.0 APPENDICES .................................................................................................................................... 53 12.1 Plan Sheets .................................................................................................................................. 54 12.2 Data Analysis/Supplemental Information and Maps .................................................................. 59 12.3 Site Protection Instrument .......................................................................................................... 97 12.4 Credit Release Schedule ............................................................................................................ 127 12.5 Financial Assurance ................................................................................................................... 131 12.6 Maintenance Plan ..................................................................................................................... 135 12.7 Stream and Wetland Delineation (Incl. Stream Identification Forms) ..................................... 139 12.8 Approved Jurisdictional Determination .................................................................................... 171 12.9 Invasive Species ........................................................................................................................ 173 12.10 Approved FHWA Categorical Exclusion ..................................................................................... 177 12.11 Agency Correspondence ........................................................................................................... 179 Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 ii FIGURES Figure 1. Project Site Vicinity Map ................................................................................................................ 2 Figure 2. Project Site Watershed Map .......................................................................................................... 4 Figure 3. Project Site / LWP Watershed Map ............................................................................................... 5 Figure 4. Soil Survey Map .............................................................................................................................. 7 Figure 5. Land Use/Land Cover Map ............................................................................................................. 9 Figure 6A. Historic Aerials ........................................................................................................................... 10 Figure 6B. Historic Aerials ........................................................................................................................... 11 Figure 7. Current Conditions Plan View Map .............................................................................................. 18 Figure 8. Proposed Asset Map .................................................................................................................... 30 Figure 9. Local Curve for Bankfull Area Determination .............................................................................. 31 Figure 10. Proposed Monitoring Plan ......................................................................................................... 48 TABLES Table 1. Credit Summary ............................................................................................................................... 1 Table 2. Existing Stream Bank Height and Entrenchment Ratios ............................................................... 12 Table 3. Existing Wetlands .......................................................................................................................... 15 Table 4. Project Attribute Table .................................................................................................................. 16 Table 5. Project Goals, Objectives, and Functional Outcomes ................................................................... 25 Table 6. Local Curve Bankfull Determination .............................................................................................. 31 Table 7. Sediment Results and Shear Stress Comparison. .......................................................................... 33 Table 8. Morphological Essential Parameters for UTHC‐1 (Top) ................................................................ 34 Table 9. Morphological Essential Parameters for UTHC‐1 (Bottom) .......................................................... 34 Table 10. Morphological Essential Parameters for UTHC3 ......................................................................... 35 Table 11. Morphological Essential Parameters for T1 ................................................................................ 35 Table 12. Morphological Essential Parameters for T1A .............................................................................. 36 Table 13. Morphological Essential Parameters for T2‐2 ............................................................................. 36 Table 14. Morphological Essential Parameters for T3 ................................................................................ 37 Table 15. Morphological Essential Parameters for T4 ................................................................................ 37 Table 16. Morphological Essential Parameters for T6‐2 ............................................................................. 38 Table 17. Morphological Essential Parameters for T6A‐2 .......................................................................... 38 Table 18. Morphological Essential Parameters for T7‐2 ............................................................................. 39 Table 19. Morphological Essential Parameters for T8‐2 ............................................................................. 39 Table 20. Morphological Essential Parameters for T8A .............................................................................. 40 Table 21. Morphological Essential Parameters for T9 ................................................................................ 40 Table 22. Project Asset Table ...................................................................................................................... 42 Table 23. Length and Summations by Mitigation Category ........................................................................ 44 Table 24. Overall Assets Summary .............................................................................................................. 44 Table 25. Monitoring Requirements ........................................................................................................... 47 Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 1 1.0 PROJECT INTRODUCTION The Mill Dam Creek Restoration Site (MDCRS) is a full‐delivery stream mitigation project being developed for the North Carolina Division of Mitigation Services (DMS) in the Yadkin River Basin (03040101 8‐digit cataloging unit) in Yadkin County, North Carolina. The site’s natural hydrologic regime has been substantially modified through the relocation and straightening of the existing stream channels, livestock impacts, and clearing of riparian buffer. This site offers the chance to restore streams impacted by pasture and agriculture to a stable headwater ecosystem with a functional riparian buffer and floodplain access. The project site is located approximately 0.5 mile north of East Bend, NC in Yadkin County. The existing primary stream, an unnamed tributary to Hall Creek (UTHC), and its fourteen tributaries are comprised of 13,506 proposed linear feet (lf). MDCRS is 0.2 mile north on Shady Grove Church Road (SR‐1538) from the intersection with Shoals Road (SR‐1546). The center of the site is at approximately 36.2390°N and 80.5201°W in the East Bend USGS Quadrangle. The MDCRS will restore a stable stream ecosystem with a combination of Restoration, Enhancement I, and Enhancement II techniques. The majority of the project streams (78%) will use a Priority 1 Approach aside from those areas that require a Priority 2 transition out of steep or incised areas. In addition to the traditional stream restoration actions, three regenerative stormwater conveyances will be used in combination with seep stabilization and long‐term easement protection to treat and protect an additional 1,852 linear feet of incoming drainage routes in the project watershed. Approximately 0.43 acre of existing jurisdictional wetlands are also being protected in the conservation easement. Altogether, the project will restore and protect a vital headwater watershed in the Yadkin Basin. Once site grading is complete, the unforested portions of the stream buffer will be planted with riparian species. The site will be monitored for a minimum of seven years or until the success criteria are met. The table below summarizes the credits that will be produced from this project. Table 1. Credit Summary Mill Dam Creek Restoration Site, Yadkin County DMS Contract 6898; DMS Project Number 97136 Mitigation Credits Stream Riparian Wetland Non‐riparian Wetland Buffer Nitrogen Nutrient Offset Phosphorous Nutrient Offset Type R RE R RE R RE Linear Feet/Acres 7,165 6,340 Credits 7,165 3,125 TOTAL CREDITS 10,290 R=Restoration RE=Restoration Equivalent NC-67Siloam RdFlint H i l l R dForbush Rd Main St Hauser Rd Shoals RdUnion Hill RdShoals RdMill Hill RdMt Bethel Ch RdSmit h t o w n R d B u t n e r M i l l R d A p p e r s o n R d Pride's Rd Indian Heaps RdHolly Springs RdC a u d l e R d Stony Ridge Rd S h a d y G r o v e C h u r c h R dButner RdMacEdonia RdBaltimore RdNunn Rd Smitherman RdBorden LnOld Mill RdMa r t i n s M i l l R d Moccasin Gap RdJ o h n S c o t t R d Grassy Creek RdSam S c o t t R d Flin t H i l l R d Aztec Dr Isi a D r Hennings RdNC-67EAST BEND Yadkin River Logan Creek Hall CreekMiller CreekGr a s s y C r e e k Horne CreekMartin Mill CreekArarat River H o g a n C r e e k Loney CreekÜ 0 10.5 Miles Figure 1. Vicinity Map, Mill Dam Creek, Yadkin County, NC Project EasementCities and Towns StreamsMajor Rivers RoadsState Highway ÊÚ YADKIN COUNTY DAVIE COUNTY SURRY COUNTY ROWAN COUNTY 2 Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 3 2.0 WATERSHED APPROACH AND SITE SELECTION The site’s watershed, Hydrologic Unit Code (HU) 03040101110070, Grassy Creek and Horne Creek, was identified in the 2009 Upper Yadkin Pee‐Dee River Basin RBRP as a Targeted Local Watershed (TLW) (NCEEP 2009). The watershed is largely rural in nature (31% agriculture and 61% forest with four documented animal operations). At the time of the River Basin Restoration Priorities (RBRP) plan, there were 11.4% of the HU’s land in conservation (primarily Pilot Mountain State Park), and the Wildlife Resources Commission (WRC) marked the HU as a priority area. The RBRP listed impacts from agriculture use, including stream bank erosion, excessive sedimentation, livestock access to streams, and stormwater pollution (fecal coliform), as the major stressors within this TLW. The goals and priorities for the MDCRS are based on the information presented in the Upper Yadkin River Basin Restoration Priorities: maintaining and enhancing water quality, restoring hydrology, and improving fish and wildlife habitat (NCEEP, 2009). The project will support the following basin priorities: ‐ Managing stormwater runoff ‐ Reducing fecal coliform inputs ‐ Improving/restoring riparian buffers ‐ Reducing sediment loading ‐ Improving stream stability ‐ Reducing nutrient loading ‐ Excluding livestock and implementing other agricultural BMP’s ‐ Protection of high‐resource value waters, including water supply watershed designated waters. The project is also located in the Ararat River Local Watershed Plan (LWP) study area. The Ararat River was designated a LWP Study Area due to poor water quality and aquatic habitat degradation issues, as well as the presence of good candidate sites for stream restora tion in rural catchments (NCEEP 2009). The stressors within the Ararat River LWP are erosion and sedimenta tion, missing or degraded riparian buffers, stormwater runoff, and nutrient and fecal coliform “hot spots” (NCEEP 2013). There are no conservation or protected areas located adjacent to the project site. While most of the project land is in agriculture or pasture, the upstream headwaters have forested riparian buffers. With the protection of this stream, there will be continuous buffers along the majority of streams within the project watershed. The nearest named downstream water body is Hall Creek, which is about 500 feet downstream of UTHC at the lower end of the project. The confluence of Tributary 8 with Hall Creek is also within the project. The section of Hall Creek downstream of the site is identified as 12‐74, and is classified for surface water as Class WS‐IV. This reach of Hall Creek was not listed as impaired on the 2016 303(d) list. The project watershed is shown in Figure 2, and another map illustrating the project location in relation to the LWP is shown in Figure 3. Copyright:© 2013 National Geographic Society, i-cubed Ü 0 1,000500Feet Figure 2. Project Site Watershed Map, Mill Dam Creek, Yadkin County, NC Image Source: USGS DRG, East Bend Quad. Project Easement Project Watershed (400 ac) 4 USGS The National Map: National Boundaries Dataset, National Elevation Dataset, Geographic Names Information System, National Hydrography Dataset, National Land Cover Database, National Structures Dataset, and National Transportation Dataset; U.S. Census Bureau - TIGER/Line; HERE Road Data Ü 031.5 Miles Figure 3. Project Site / LWP Watershed Map, Mill Dam Creek, Yadkin County, NC Image Source: See map Ararat River & Upper Yadkin LWP 14-digit Hydrologic Units Project Watershed Project Easement 5 Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 6 3.0 BASELINE AND EXISTING CONDITIONS 3.1 Watershed Processes and Resource Conditions 3.1.1 Landscape Characteristics The site lies within the Northern Inner Piedmont (Level IV 45e) ecoregion of the Piedmont. The Northern Inner Piedmont has higher elevations and more rugged topography than other areas of the Piedmont and mostly consists of a mosaic of cropland, pasture, and forest. The natural vegetation contains Virginia pine, chestnut oak, and many mountain disjunct plant species. This area is typified by rolling to hilly well‐ dissected upland that contains mostly gneiss and schist bedrock covered with clayey and micaceous saprolite (Griffith et al. 2002). The MDCRS is within the Sauratown Mountains Anticlinorium and the geologic formation mapped at the project is Metagraywacke and Muscovite‐Biotite Schist (CZmg), which consists of metamorphosed basaltic to andesitic tuffs and flows, grayish green to black and locally includes hypabyssal intrusives and minor felsic metavolcanic rock (USGS 2018). The project watershed consists of steeper, confined first‐order stream valleys converging onto the floodplain of UTHC. The valley along UTHC varies from semi‐confined to open, and boulders and bedrock are interspersed in the reaches. According to the Soil Survey of Yadkin County, the majority of the proposed project consists of Fairview soils (FdE2 and FgD2), which are hydric interfluvial soils that transition into floodplain soils consisting of Cordus loam (CrA) and Siloam sandy loam (SmE) along the lower portions of UTHC and Tributary 8, the two streams that near the confluence with Hall Creek. The results of the soil survey are presented in the following map (Figure 4). These soil types do not present any major limitations for typical construction activities associated with stream restoration. FdE2 CcB2 CcC2 FgD2 CcB2 CrA CcC2 CcC2 FdE2 CcC2 FaD CgC2 FaD SmC FdD FgD2 FaE CcC2 FaE FaD FdE2 SmD FaE Ca SmE FdD2 CcC2 CgC2 CgB2 Fa CcC2 FaD CgB2 FdD2 FdD2 FdD2 FdE2 CcC2 CgB2 CaC FeE3 CaC FdE2 SmD CcC2 FsF FaD FdD2 FdE2 CcC2 CgB FdD2 CgC2 FdE2 Fd CaB FdD2 SmC C FdD2 NCCGIAÜ0600300 Feet Figure 4. NRCS Soil Survey, Mill Dam Creek, Yadkin County, NC Image Source: See map NRCS Soil Survey (Yadkin County) Proposed Easement (40.2 ac) Soil Series CaC - Clifford fine sandy loam, 6-10% slopes CcC2 - Clifford fine sandy loam, 6-10% slopes, moderately eroded CgB2 - Clifford gravelly fine sandy loam, 2-6% slopes, moderately eroded CgC2 - Clifford gravelly fine sandy loam, 6-10% slopes, moderately eroded CrA - Codorus loam, 0-2% slopes FdE2 - Fairview sandy clay loam, 15-25% slopes, moderately eroded FgD2 - Fairview gravelly fine sandy loam, 10-15% slopes, moderately eroded SmE - Siloam sandy loam, 15-25% slopes 7 Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 8 3.1.2 Land Use/Land Cover and Chronology of Impacts The project watershed for the MDCRS is comprised of 0.63 square miles (400 acres). Current land use within the project watershed consists of forest (45%), pasture/farmland (39%), low‐density residential development (15%), and roads (1%); the estimated percent impervious is 3%. The project site is located in a rural area in northeastern Yadkin County. The development pressure within the project watershed is low. Current land use is shown in Figure 5. The MDCRS has undergone modifications that have altered the site hydrology and vegetation. Historic aerials were examined for any information about how the site has changed over recent history (Figures 6a and 6b). Historic aerials were obtained from the NRCS, USGS EarthExplorer, and Google Earth for 1950, 1963, 1966, 1976, 1993, 2002, 2010, and 2014. The site has been systematically impacted over the past 65 years. The primary impacts to the system are associated with channelization and clearing throughout the site to utilize the resources in support of agricultural production. In the earliest aerial photo from 1950, most of the upstream portions of the project have already been cleared and there is widespread agriculture occurring along all of the tributaries. T1 and T1A are forested in the 1950 photo, but were cleared by 1963. A portion of UTHC, upstream of the confluence with T9, was impacted by silvicultural practices. The field west of the stream has been cleared by 1963 and was expanded by 1976. The 1976 photo illustrates that the site has been impacted by several alterations, including the construction of the first chicken house south of T8. Shady Grove Church Road was also altered and moved away from T8A. Between 1976 and 1993, the area has had more clearing and low‐density development. This includes more residences along Shady Grove Church Road and Shoals Road, and trees have been cleared along T5, T5A and T5B. These photos also show that by 2002, the pond at the confluence of T6 and T6a has been built and that the original chicken house adjacent to T8 was removed, and two additional chicken houses were constructed. Prior to 2010, the eastern bank of Hall Creek, downstream of the project, was reforested. During this time, UTHC and T9 were impacted by silvicultural practices, including areas of clear cutting. By 2014, a crossing was added across UTHC in order to access the fields north of T9 and the area around T9 was planted with pine trees. Over the 65 years of available record, both physical and functional impacts to the project streams on the site have been documented. These impacts included: channel modification, ditching, impacts from adjacent row cropping and timber harvesting, and general vegetation removal. NCCGIA Ü 0 1,000500Feet Figure 5. Project Landuse, Mill Dam Creek, Yadkin County, NC Image Source: NC One Map Orthoimagery, 2014. Land Use Water Forest (45%) Pasture/Farmland (39%) Low-Density Development (15%) Roads (1%) Project Watershed (400 ac) Proposed Easement 9 Image Sources: USGS Earth Explorer. 1950 1966 1976 1963 Ü 02,5001,250 Feet Figure 6A. Historic Aerial Photographs, Mill Dam Creek, Yadkin County, NC Project Easement 10 NCCGIA NCCGIA NCCGIA Image Sources: USGS Earth Explorer. 1993 2010 2014 NCCGIA 2002 Ü 02,5001,250 Feet Figure 6B. Historic Aerial Photographs, Mill Dam Creek, Yadkin County, NC Project Easement 11 Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 12 3.1.3. Watershed Disturbance and Response The project site and its 15 streams have experienced landscape and vegetative modifications to allow for agriculture and grazing. The existing site conditions are shown in Figure 7 and seen in site photographs. A project‐wide assessment of stream stability and causes of impairment was performed at the project. There are four main sections of the primary channel, which is an unnamed tributary to Hall Creek (UTHC), and 14 additional streams (tributaries 1, 1A, 2, 3, 4, 5, 5A, 5B, 6, 6A, 7, 8, 8A, and 9). The project streams are generally in Stage III (Degradation) in the channel evolutionary process (Simon and Rinaldi 2006). The primary disturbance to the system has been the relocation and straightening of the project streams, which has disconnected flow from a frequently accessible floodplain or floodprone area. There have been disturbances to the sediment regime of the site, but they are localized on‐site from upslope erosion induced by cattle and direct impacts on stream banks made by cattle hooves. Former or existing dams have interrupted natural sediment processes on UTHC, T6 and T8. Of the project streams, approximately 29% are experiencing low levels of erosion, 60% moderate levels, and 11% high levels of erosion. The majority of the project streams have bank height ratios greater than 1.5, as seen in the table below, which indicates the degree of incision that has occurred across the project channels. Table 2. Existing Stream Bank Height and Entrenchment Ratios Stream Existing Bank Height Ratios Existing Entrenchment Ratios UTHC1 1.0 ‐ 10.4 1.2 ‐ 2.6 UTHC3 2.7‐3.2 1.2 T1 1.0 ‐ 4.5 1.5 ‐ 4.4 T1A 19.6 1.1 T2 3.3 1.3 T3 5.5 1.2 T4 6.9 1.9 T6 4.4 1.2 T6A ponded ponded T7 1.7 1.4 T8 2.5 1.1 T8A 2.7 1.1 T9 1.7 1.9 The primary hydrologic feature at the site is UTHC, which runs for 6,619 existing lf through the project. UTHC has been divided into four sections: UTHC1 (1,874 lf), UTHC2 (1,494 lf), UTHC3 (1,411 lf), and UTHC4 (1,840 lf). UTHC1 enters the project from a driveway culvert at the southern limit of the project. The upper 700 lf are channelized and have been straightened. This section is incised with vertical banks and no floodplain access; vegetation is limited to a small number of early successional and invasive species along the banks. From this point forward, the valley topography changes and the bank height ratio decreases. At this transition, a highly eroded ephemeral drain joins the stream from the west. This drain receives direct runoff from the adjacent row crop agriculture and contributes sediment and nutrient‐rich waters to UTHC1. After this drain confluence, UTHC1 meanders through a lluvial deposits and repeatedly runs into the adjacent terrace, creating bank erosion just upstream of the confluence with T1. Downstream from this confluence, UTHC1 flows north to confluences with Tributaries 2 and 3. This section of UTHC1 has been impacted by livestock and is characterized by eroding banks, no riparian buffer, poorly defined bed features, and variable bank height ratios. After the T2 confluence, there are numerous bedrock outcrops. Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 13 After the confluence with T3, UTHC2 starts as the stream becomes bedrock dominated, which provides vertical stability along UTHC until the confluence with Tributary 6. The banks are vertical, eroding, and undercut. There is a vegetated buffer along the western side of the channel, but the width of vegetation on the eastern side is limited and full of invasive species. Livestock also access this section, with their impacts spread throughout the stream. UTHC3 begins approximately 70 feet upstream of the confluence with Tributary 6, and the stream continues to flow north‐northwest. Approximately 33% of this section is experiencing severe bank erosion and the bed lacks well‐developed riffle and pool morphology. The vegetation along UTHC3 is limited to a narrow vegetated buffer with early successional species. Based on the three surveyed cross‐sections, the assessed channel dimensions are oversized compared to the expected bankfull channel for a stream of this drainage size. There are spoil piles from channelization along the right bank (mapped on Figure 7). There is a relic floodplain in this part of the valley, and the LIDAR data show that the open area to the left of the channel is lowest part of the valley, which indicates that the channel may have been moved to its current location. Approximately 700 lf after the confluence with Tributary 6, the UTHC stream valley narrows and the stream flows through an old breached earthen dam. After this dam, UTHC3 continues in a similar condition, but with evidence of potential legacy sediments from a history of agricultural erosion within the valley. UTHC4 starts approximately 500 lf after the confluence with Tributary 7 at an existing crossing on UTHC. After the crossing, the channel has widened and bank erosion is predominant. There are still mature trees along UTHC4 in this area, but many are undercut, and not contributing to bank protection. Access roads have been constructed through the riparian buffer. After flowing under another utility easement, the slope of the valley begins to decrease and the channel has been straightened and ditched to allow for row crop cultivation. The bottom 500 lf of this section are straight and incised with minimal bed heterogeneity and a narrow band of riparian vegetation growing on the banks, ending at an existing crossing over the channel. Tributary 1 (T1) begins at a small pond just outside of the project easement and flows toward the southeast. This channel has been severely degraded by livestock impacts, has sparse riparian vegetation, and widespread eroding banks. The project easement extends to the northwest here to capture a spring/seep that flows over bedrock and then to T1. Approximately 300 lf downstream of the beginning of T1 is the confluence with Tributary 1A (T1A), which is a highly incised channel that receives large amounts of sediment from eroding gullies at its upstream limits. Where T1A begins, the gullies have cut the stream deep into the landscape, with the majority of its length having bank heights of 12 to 15 feet. Areas of dumped agricultural and residential trash are also scattered along this reach. After the confluence of the two reaches, T1 has no buffer and continues to flow northeast to its confluence with UTHC. Tributary 2 (T2) forms where multiple ephemeral drainages converge. Some of these drains are forested, while others flow from the adjacent row crops to the east and south. This area is approximately 50‐feet long and has multiple headcuts contributing to sediment loading to downstream reaches. After this point, the stream flows west through a valley with a wide hardwood buffer on the right bank and a variable width buffer on the left. Where T2 emerges from the forest into a pasture, the channel begins to incise with signs of active erosion and livestock impacts. Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 14 Approximately 300 lf downstream of the T2 confluence, Tributary 3 (T3) flows into UTHC. T3 is 378 lf long and begins at a seepage‐driven wetland. Where the flow becomes concentrated, a deep headcut begins and the channel becomes incised flowing east. The remainder of this channel has steep eroding banks, high bank height ratios, livestock impacts, and poorly developed bed features. Tributary 4 (T4) is 151 existing lf, with the hydrology source being a combination of ground and surface water. Flow begins at a severe headcut, and after this point the stream flows east and is defined by short, steep, and erosive bed features and bank erosion along vertical banks. Tributary 5 (T5) joins UTHC from the east. The 1,205‐lf stream generally flows to the northwest and the lower two‐thirds of the channel are characterized by a partially confined valley that has a mix of early successional vegetation throughout the riparian buffer and stream banks. There are several small headcuts through this portion of the channel, but the channel erosion is moderate. The upper portion of T5 is split into three small streams at a failing crossing: T5, T5A, and T5B. All three of these streams are close to houses and have some level of buffer clearing and accumulated residential and agricultural trash from sporadic dumping. T5 is the southernmost and has low bank heights, but the right bank of this portion of T5 is completely cleared of vegetation. T5A is the next small stream (65 lf) to the north; the vegetation along both banks have been cleared and there is trash in the channel. This stream is fed by a spring at the top of the reach. The next stream to the north is T5B, which begins at a culvert under a driveway. This stream is approximately 438 lf with channel incision, but a thin line of alders (Alnus serrulata) on the banks offers some bank protection. After these alders, the riparian vegetation has either been cleared or is a thicket of invasive species. The next downstream stream is Tributary 6, part of which is ponded. T6 flows from the east to its confluence with UTHC. Starting at the top of this drainage, two small tributaries flow into the pond. The upper portion of T6 (325 lf) flows in from the northeast and T6A (157 lf) flows in from the southeast. Both of these are cattle‐impacted and embedded with fine sediment where they flow into the pond and their upstream portions are generally steep boulder and bedrock‐controlled channels with isolated areas of moderate bank erosion. Just of upstream of where T6 joins the pond, there is an eroded access road and culverted crossing. Sediment is washing off of the road in this location and into T6 and the pond. The lower portion of T6, approximately 350 lf through the pond and then 271 lf starting at a piped dam outlet, is devoid of bank vegetation and has extensive cattle impacts. The dam is earthen, approximately 15‐feet tall and 100‐feet wide, and impounds an approximately 0.4‐acre pond. There is an overflow spillway on the north end of the dam. The outlet to this spillway is highly eroded and large amounts of sediment have been washed downstream. Tributary 7 (T7) flows into UTHC approximately 150 lf downstream of the breached dam on UTHC noted above. The upstream reach of T7 (165 lf) is in a more confined valley with an intact riparian buffer and a bed controlled by boulder and bedrock outcrops. The lower portion (335 lf) is incised, with eroding banks, headcuts, and minimal vegetation along the banks. There is one wetland area (0.1 acre) along the left bank midway upstream of T7. Tributary 9 (T9) is 133 lf and is similar to the lower reach of T7. There is an unstable portion of channel along the downstream segment where T9 ties into UTHC. Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 15 The remaining two tributaries, Tributaries 8 and 8A (T8 and T8A), are located on the opposite side of Shady Grove Church Road from the rest of the site. Both small channel s on this side of the road have been altered by past agricultural practices and have impacts caused by present day livestock access. Tributary 8 (T8) flows directly to Hall Creek and T8A joins T8 approximately 150 lf upstream of this confluence. The upstream part of T8 begins at a headcut where livestock impacts have destroyed the banks and any bed form that used to be present. From this headcut, the stream form and banks are more intact as it flows down the confined and relatively steep valley with bedrock and boulder grade control. The riparian buffer in this area has scattered medium‐sized trees, but minimal understory vegetation other than invasive vegetation. When the stream comes out of the confined valley, the channel flows into a wetland area where an old farm pond has filled with sediment and the stream has breached the southwestern side of the earthen dam. This breach is now an active headcut. From the breach, the stream flows northwest, through a bedrock ford crossing, and then after several headcuts meets Hall Creek. T8A flows into T8 just upstream of the bedrock ford. This stream flows in from the east. The stream begins at a large headcut, about 220 lf upstream of the confluence with T8. This portion of channel is damaged by livestock, and has active headcuts. Overland and seepage flow from the southeastern side of the valley is intercepted by a toe of slope drain that prevents this hydrologic source from contributing flow to T8A. A jurisdictional determination was submitted to the US Army Corps of Engineers on November 14, 2016 and was approved on January 5, 2017. The approved jurisdictional determination is included in Section 12.8. In addition to the project streams, there are nine jurisdictional wetlands at the site (see Table 3 below). Following the completion of the mitigation plan, a pre‐construction notification (PCN) will be completed to apply for a Nationwide 27 Permit (NWP) to comply with Sections 401 and 404 of the Clean Water Act with the Wilmington District of the US Army Corps of Engineers and the NCDEQ Division of Water Resources. Table 3. Existing Wetlands Wetland ID NCWAM Hydrologic Class Cowardin Class Size (Acres) Location WA Headwater Forest Riparian PFO 0.11 Left bank along lower end of T7 WB Bottomland Hardwood Forest Riparian PFO 0.03 Left bank of UTHC2 upstream of T6 WC Headwater Forest Riparian PEM 0.10 Upstream of T3 WE Headwater Forest Riparian PFO 0.07 Upstream of existing pond on T6 WG Headwater Forest Riparian PSS 0.01 Upper portion of T8 WH Headwater Forest Riparian PFO 0.06 Right bank along lower section of T8 WI Headwater Forest Riparian PFO 0.02 Right bank along lower section of T8 WJ Headwater Forest Riparian PFO 0.02 Right bank along lower section of T8 WK Headwater Forest Riparian PSS 0.01 Upstream of T8A The project attribute table below summarizes current conditions at the site and Figure 7 displays the current conditions at the site. Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 16 Table 4. Project Attribute Table Project Information Project Name Mill Dam Creek Restoration Site County Yadkin County Project Area (acres) 40.2 acres Project Coordinates (lat. and long.) 36.2390°N, 80.5201°W Planted Acreage (Acres of Woody Stems Planted) 29.2 acres Project Watershed Summary Information Physiographic Province Piedmont River Basin Yadkin USGS Hydrologic Unit 8‐digit 03040101 USGS Hydrologic Unit 14‐digit 03040101110070 DWQ Sub‐basin 03‐07‐02 Project Drainage Area (acres) 400 acres Project Drainage Area Percentage of Impervious Area 3% CGIA Land Use Classification Forest (45%), Pasture/Farmland (39%), Low‐density Residential Development (15%), and Roads (1%). Existing Reach Summary Information Parameters All Reaches Combined Length of reach (linear feet) 14,024 Valley Confinement Partially confined to confined Drainage area (acres) 400 acres Perennial, Intermittent, Ephemeral Intermittent ‐ Perennial NCDWQ Water Quality Classification C (Aquatic Life, Secondary Recreation) Rosgen Stream Classification (Existing/Proposed) F4/G4/C4/B4 Evolutionary trend (Simon) Stage III FEMA classification Zone AE at confluence of T8 and Hall Creek, otherwise none Existing Wetland Summary Information Parameters WA,WB, WE, WG, WK WC WH, WI, WJ Size of Wetland (acres) 0.23 0.10 0.10 Wetland Type Riparian Non‐Riverine Riparian Non‐Riverine Riparian Non‐Riverine Mapped Soil Series Fairview Fairview Siloam Drainage class Well drained Well drained Well drained Soil Hydric Status Non‐Hydric Non‐Hydric Non‐Hydric Source of Hydrology Groundwater Groundwater Groundwater Restoration or Enhancement Method N/A (Preservation) Areas of erosion to stabilize N/A (Preservation) Regulatory Considerations Regulation Applicable? Resolved? Supporting Documentation Waters of the United States – Section 404 Yes Applying for NWP 27 Preliminary JD approved Waters of the United States – Section 401 Yes Applying for NWP 27 Preliminary JD approved Endangered Species Act** Yes Yes USFWS Historic Preservation Act** No Yes NCSHPO Coastal Zone Management Act ** (CZMA)/ Coastal Area Management Act (CAMA) No N/A N/A FEMA Floodplain Compliance No Yes N/A Essential Fisheries Habitat** No N/A N/A **Items addressed in the Categorical Exclusion in Appendix. Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 17 Table 4 continued Stream Parameters UTHC T1, T1A T2 T3 T4 T5, T5B Length of reach (linear feet) 6,619 1,510 731 378 151 1,643 Drainage area (acres) 389 acres 43 acres 16 acres 7 acres 3 acres 39 acres NCDWR Classification WS‐IV WS‐IV WS‐IV WS‐IV WS‐IV WS‐IV Rosgen Classification F4, C4, B4 B4, C4, F4, G4 G4 G4 B4 B4,C4 Evolutionary trend Stage III Stage III Stage III Stage III Stage III Stage III Mapped Soil Series Clifford/ Fairview,Cordus Clifford Clifford Fairview Fairview Clifford, Fairview Drainage class Well drained, Somewhat Poorly Drained Well drained Well drained Well drained Well drained Well drained Soil Hydric status Non‐Hydric, Hydric Non‐Hydric Non‐Hydric Non‐Hydric Non‐Hydric Non‐Hydric Slope 1.4‐2.1% 2.2‐2.6% 3.8% 5.9% 8.9% 2.7% FEMA classification Zone X Zone X Zone X Zone X Zone X Zone X Existing vegetation community Pasture, Forest Pasture Forest Pasture, Forest Forest Pasture, Forest Thermal regime Warm Warm Warm Warm Warm Warm Stream Parameters T5A T6, T6A T7 T8, T8A T9 Length of reach (linear feet) 65 1,103 500 1,189 133 Drainage area (acres) 0.5 acre 29 acres 41 acres 21 acres 29 acres NCDWR Classification WS‐IV WS‐IV WS‐IV WS‐IV WS‐IV Rosgen Classification B4, F4 G4 G4 G4 B4 Evolutionary trend Stage III Stage III Stage III Stage III Stage III Mapped Soil Series Clifford Fairview Fairview, Cordus Siloam Fairview Drainage class Well drained Well drained Well drained Well drained Well drained Soil Hydric status Non‐Hydric Non‐Hydric Non‐Hydric Non‐Hydric Non‐Hydric Slope N/A 4.1% 3.3% 4.4‐5.2% 3.9% FEMA classification Zone X Zone X Zone X Zone X, Zone AE at confl w/Hall Creek Zone X Existing vegetation community Pasture, Forest Forest Forest Pasture, Forest Forest Thermal regime Warm Warm Warm Warm Warm ## # # # # # # # # # # # # " "" " " " " ^_ ^_ ^_ ^_ Begin T1 Begin T1A Begin UT to Hall Creek (UTHC1) Begin T2 Begin T4 Begin T5 Begin T5A Begin T5BT5 T1 Begin T6 Begin T6A T6 Begin T7 UT H C UTHCBegin T3 UTHC4 Begin T8A Begin T8 T8 UTHC3 UTHC2UTHC XS9UTHC XS8T2 XST9 X S T3 XST1A X S T6 XST7 X S T1 XS2T4 XSUTHC XS7UTHC XS2T 8 A X S T1 XS3T8 XS2UTHC X S 3 UTHC XS1 UTH C X S 5UTHC XS6T1 X S 1 UTHC XS4T8 XS1NCCGIA Ü 0 500250Feet Figure 7. Existing Conditions, Mill Dam Creek, Yadkin County, NC Image Source: NC OneMap Orthoimagery, 2014. Proposed Easement (40.2 ac) Existing Streams Ephemeral or Other Drainage Features Existing Ponds Existing Wetlands (0.43 ac) Cross-Sections ^_Reference Cross-Sections "Cattle Wallows #Headcuts Spoil Piles Berms 18 Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 19 3.1.4 Site Photographs Photo 1: View of livestock impact to UTHC‐1 Photo 2: Beginning of T1 at culvert from pond Photo 3: Active erosion on UTHC‐1 just upstream of confluence with T1 Photo 4: Headcut at beginning of T2 Photo 5: Cattle‐impacted wetland at beginning of T3 Photo 6: Two headcuts from wetland seep area to beginning of T3 Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 20 Photo 7: Typical view of bedrock in UTHC‐2 Photo 8. Representative photo of ephemeral drain that will be included in restoration project. Photo 9: Outlet of T5A from a seep. Photo 10: Typical section of T5A. Photo 11: Pond at confluence of T6 and T6a Photo 12: Pond outlet to T6 Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 21 Photo 13: View cattle impact to T6 below pond Photo 14: Active erosion and deposition on UTHC‐3 downstream of confluence with T6 Photo 15: Eroding outer bank on UTHC3 Photo 16: Overwidened section and right bank erosion on UTHC3. Photo 17: Eroding bank along UTHC3 Photo 18: Undercut outer bank on UTHC3 Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 22 Photo 19: Active erosion on UTHC‐3 just upstream of confluence with T7 Photo 20: Active erosion on UTHC‐3 Photo 21: Entrenched portion of T7 Photo 22: Active erosion on UTHC‐4 Photo 23: Active erosion on UTHC‐4 Photo 24: View of UTHC‐4. Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 23 Photo 25: Straightened section of UTHC‐4 Photo 26. Downstream end of project on UTHC‐4 Photo 27: Cattle impact at beginning of T8 Photo 28: View of T8 further downstream Photo 29: Confluence of T8 and T8A Photo 30: Looking downstream on T9 Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 24 4.0 FUNCTIONAL UPLIFT POTENTIAL Cattle impacts, vegetation removal, and channelization are among the causes that have reduced the functionality of the project streams and riparian buffers. The proposed project captures a large proportion of the project watershed’s drainage routing and offers the opportunity to produce functional uplift at the site that would not otherwise occur within the near future. The uplift for MDCRS will be achieved at the hydraulic, geomorphological, and physicochemical functional levels. Hydraulic improvements will come either from relocating projects streams to a location with a historic floodplain or establishing an accessible floodprone area. Reestablishing this type of connectivity will return a hydraulic routing system through this stream corridor that will distribute flood flows through a broader area with reduced in‐channel stress rather than within a confined channel. Geomorphological functional uplift will be achieved through channels sized to the bankfull flow, a planform and profile design emphasizing bedform variation with woody debris for bank protection and habitat, and the reestablishment of a forested riparian corridor. As a result, bank migration and lateral stability will be restored to a sustainable level and the banks and bed will accommodate design flows. Sediment inputs will decrease due to reduced bank erosion and sediment transport can return to an equilibrium level that will accommodate watershed inputs. Riparian plantings will further support geomorphological functionality by increasing bank stability. Physicochemical functions will improve with the reductions in bacterial and nutrient inputs to the project streams from converted land use (pasture to forested buffer) and filtering capabilities of the riparian buffer. These nutrient and bacterial parameters will not be monitored directly, but rather have been estimated as a reduced contribution to project streams of 2.56 x1014 fecal coliform colonies, 727 pounds of total nitrogen, and 59 pounds of total phosphorus per year (based on NCDMS 2016 guidance; see Section 12.2). Consideration of future impacts to the area that could limit functional uplift opportunities is important when assessing project potential. As mentioned above, the project will permanently protect the majority of the streams and drainages in the project watershed. Approximately 89% of the jurisdictional streams within the project watershed are protected in the permanent conservation easement, and an additional 1,850 lf of other drainage conveyances will be included as well. We are improving three of the ephemeral channels with regenerative stormwater conveyances (RSCs) and stabilizing other non‐jurisdictional features from further erosion. The site will also protect 0.43 acres of existing wetland. These non‐credit generating improvements to the project will help protect the longevity of the restored streams by further reducing excess sedimentation. The table below summarizes the project goals and objectives that will lead to functional improvements and the monitoring tools that will be used to track these changes to the site. Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 25 5.0 MITIGATION PROJECT GOALS AND OBJECTIVES Table 5. Project Goals, Objectives, and Functional Outcomes Goals Objective Functional Level Function‐Based Parameter Effects Monitoring Measurement Restore channelized and livestock‐ impacted streams to stable C and B‐ type channels Relocate or stabilize channelized and/or incised streams to connect to a floodplain or floodprone area Hydraulics Floodplain Connectivity Flood Frequency Bank Height Ratio and Entrenchment Ratio Install a cross‐section sized to the bankfull discharge Geomorphology Bank Migration/Lateral Stability Cross‐Sectional Survey Visual Inspection of Bank Stability Create bedform diversity with pools, riffles, and habitat structures Geomorphology Bed Form Diversity Percent Riffle and Pool, Facet Slopes, Visual Inspection Visual Inspection of Feature Maintenance Restore a forested riparian buffer to provide bank stability, filtration, and shading Fence out livestock to reduce nutrient, bacterial, and sediment impacts from adjacent grazing and farming practices to the project tributaries. Geomorphology Bed Material Characterization Pebble Count Physicochemical Nutrient and Bacteria Reductions Estimated Reductions based on Converted Land Use Plant the site with native trees and shrubs and an herbaceous seed mix. Geomorphology/ Species Composition Vegetation Density Species Composition/Diversity Table adapted from Harman et al 2012 6.0 DESIGN APPROACH AND MITIGATION WORK PLAN Mitigation at the MDCRS will includes: the realignment of the project streams to their relic floodplains or development of floodprone benches, exclusion of cattle, installation of three RSCs at point sources of concentrated flow coming from outside the easement, long‐term protection of existing wetlands, and the establishment of a native riparian buffer. The project will restore and enhance a total of 13,506 lf, which will generate 10,290 lf of stream credit within the conservation easement. An overview map of the proposed mitigation is shown in Figure 8 and the project plan sheets are included in Section 12.1. Based on the deficiencies described above, a mitigation work plan has been developed to restore the project streams and achieve functional improvements. Mitigation will occur along UTHC and multiple reaches along fourteen tributaries. The project streams were designed using a modified reference reach approach using four stable on‐site cross‐sections (see Section 12.2 for data) for dimensional data in combination with pattern data taken from the UT Fisher River reference and supplemental morphological criteria information from Harmon et al. 2012. The on‐site cross‐sections represented areas with evident bankfull indicators (see Figure 7 for Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 26 locations). The UT Fisher River site is located in Surry County, and is approximately 20 miles to the northwest of MDCRS. The reference site has a drainage area of approximately 0.38 square mile and sediment size comparable to the range at MDCRS, ranging from fine to coarse gravel for the D50‐D84 values. The common reference values from Harmon et al. 2012 were also used to adjust the design criteria as necessary to fit the existing site conditions. The range of slopes at the MDCRS (from 1.5% along UTHC to 11% on T4) required adjustments for each reach. 6.1 UT Hall Creek (UTHC) UTHC is the primary stream channel at the site and involves 2,927 lf of Restoration, 2,208 lf of Enhancement I, and 1,018 lf of Enhancement II over four sections that have been divided into eight reaches. The first section, UTHC1, will involve the restoration of 1,874 lf. It begins at the culvert under the driveway at the southern end of the site. Since the elevation of this reach is controlled by this culvert, the beginning will start as a Priority 2 approach and then transition to a Priority 1 approach for the majority of the reach. As this reach transitions to a Priority 1 approach, the stream will be realigned through the valley bottom with variable bedform and wood habitat features added to the channel. After the confluence with T2, the restoration design will begin to transition to match the channel form of the next reach, UTHC2; as a result, two separate cross‐section designs (UTHC1 Top for the reach above T2 and UTHC1 Bottom for the reach below T2 – see plans in Section 12.1) will be used. The end of UTHC1 will resemble the Priority 2 transition at the top of the reach as the stream gains more bedrock near UTHC2. The design incorporates these rock features for natural grade control. UTHC2 begins at the confluence with T3 and is a reach that will provide 1,494 lf of Enhancement I. Given the predominance of bedrock in the profile, there are minimal proposed bed changes, but there will be modifications made to the channel cross‐section. The profile will be enhanced where feasible, focusing on the addition of deep water pools where possible. The UTHC2 work will focus on grading back and repairing banks, adding wood to the channel, and extending the floodprone area by benching the channel where possible. The RSC to be installed along “Ditch 2” (see Figure 8 and construction plans as well as the RSC section below) will provide additional water quality uplift to this reach. This, in combination with the stabilization work done on “Ditch 1” along UTHC1, will be considered ancillary project benefits to help justify the Enhancement I approach for UTHC2. After the confluence with Tributary 6, UTHC3 starts, which is a restoration reach of 1,411 lf. There will be a transition design to a Priority 1 approach that will follow a similar method used for the transitional portions of UTHC1, going from a Priority 2 to 1 approach, and then back again to a Priority 2 approach at the end of the reach. The design transitions UTHC3 back to its historic floodplain, where a new pattern with riffles, pools, and woody debris in the channel will be constructed. At the end of UTHC3, the stream will transition back to UTHC4, an enhancement reach. UTHC4 begins at an existing road crossing approximately 500 lf downstream of T7. Mitigation along UTHC4 will be a mixture of Enhancement I and II approaches with four separate reaches: UTHC4‐1 with 297 lf Enhancement I, UTHC4‐2 with 521 lf of Enhancement II, UTHC4‐3 with 419 lf of Enhancement I, and UTHC4‐4 with 497 lf of Enhancement I. This targeted design approach for UTHC4 focuses on stabilizing banks, working around existing mature trees, creating benches along the existing stream, planting open areas of the riparian buffer, and reducing exotic invasive species in a way that maintains the existing intact features and vegetation while improving the degraded portions of stream. Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 27 6.2 Tributaries 1 and 1A T1 will be restored using a Priority 1 approach for approximately 734 lf. The design will raise the bed of the channel so that there is an active floodplain along its length. The easement will also incorporate an active ephemeral seep coming in from the north before the T1A confluence that will be stabilized and revegetated. While not a creditable asset, protecting this source of hydrology is a benefit to the project streams. T1A will be restored for 795 lf. A RSC (see below) will be installed upstream of the start of T1A (STA 148+78‐150+00) to reduce sediment and nutrient inputs from the surrounding livestock pasture runoff. The bed elevation for T1A will be raised as much as possible given the constraints of how deeply the stream is incised. The wide bench/floodplain meets the DMS design guidelines for Priority 2 restoration. Towards the bottom of the reach where the valley widens to join T1, the design will more closely align with a Priority 1 approach. 6.3 Tributary 2 For T2, there are two reaches: the upstream Enhancement II reach (T2‐1) and the downstream Restoration reach (T2‐2). The upper reach will be enhanced using an Enhancement II methodology for approximately 498 lf (STA 200+00‐204+98). Channel work at the top of T2‐1 will arrest the active headcuts and grade the banks to a stable angle and form. The rest of T2‐1 will receive intermittent bank grading and the areas of cleared easement outside of the wooded corridor will be planted with native vegetation. Invasive plants will be treated throughout the easement. T2‐2, the lower reach from STA 204+98‐207+63, will be restored using a Priority 1 approach for approximately 265 lf. Restoration will begin where the stream leaves the existing wooded corridor. The design will raise the bed of the channel so that there is an active floodplain along its length. 6.4 Tributary 3 T3 will be restored using a Priority 1 approach for 369 lf. An existing wetland area has been incorporated into the conservation easement at the head of this tributary. Stream restoration will begin downstream of this wetland and will raise the bed elevation at the very be ginning of the reach where there is an existing headcut that is partially draining the wetland. The stream restoration will serve to improve wetland hydrology. The design will raise the bed of the channel so that there is an active floodplain along its length. 6.5 Tributary 4 T4 will be restored using a Priority I approach for approximately 151 lf. Restoration efforts will begin at the upstream end of this reach where there is currently a large headcut. The stabilized grade transition from the upper part of the channel will allow the stream to match the existing channel elevation downstream. Further downstream on T4, grade control structures will be installed to stabilize the steep, degraded stream bed until the confluence with UTHC. 6.6 Tributaries 5, 5A, and 5B These three tributaries will be enhanced using an Enhancement II methodology for approximately 1,685 lf. The work along T5 will concentrate on stabilizing local areas of instability, such as near the confluence with UTHC where there is a failing culverted crossing, intermittent bank grading, livestock exclusion, invasive vegetation control, removing trash and dumped debris from the channel, and replanting the cleared parts of the easement. A similar design approach will be used for T5A and T5B. Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 28 6.7 Tributaries 6 and 6A T6 and T6A will each be divided into upper and lower reaches. The upper reaches, T6‐1 (259 lf) and T6A‐ 1 (60 lf), will both be Enhancement II, and the lower reaches, T6‐2 (658 lf) and T6A‐2 (101 lf), will be Restoration. The Enhancement II reaches for both streams have boulder and bedrock grade control. As a result, enhancement will be take the form of ancillary work, such as stabilization of the access road adjacent to T6, which has undergone heavy erosion, removal of the entire pond dam and the pond itself, and the stabilization of the pond overflow area, which is also actively eroding and contributing sediment to the system. The lower reaches will be restored as they trans ition into the former pond area. Restoration will then continue with a Priority 1 approach to the confluence with UTHC3. The design will raise the bed of the channel so that there is an active floodplain/bench along its length. 6.8 Tributary 7 Similar to other project streams , T7’s mitigation has been divided into an upper Enhancement II reach (T7‐ 1 with 165 lf) and a downstream Restoration reach (T7‐2 with 348 lf). The work along T7‐1 will consist of livestock exclusion, riparian planting, intermittent bank grading, invasive vegetation treatment, and installation of grade control structures. Restoration will begin where T7‐2 begins to lose bed and bank stability. The design will raise the bed of the channel so that there is an active floodplain along its length and construct a variable bed morphology that the stream currently does not have. 6.9 Tributaries 8 and 8A T8 has two reaches: T8‐1 with 445 lf of Enhancement II at the top and T8‐2 with 426 lf of Restoration at the bottom of the stream. T8A consists of a single Restoration reach of 263 lf. T8‐1 begins at a severe headcut that has been further degraded by livestock, so much so that there are no clearly defined banks along the stream. A new channel form will be reshaped to connect the stream up and downstream of this problem area. Downstream of the headcut on T8‐1, the remainder of enhancement will consist of livestock exclusion, invasive species control, and riparian buffer planting. At the transition to restoration at T8‐2, the design will preserve the wetland that has developed in the old pond footprint and create a transition of the channel through the breached pond dam to begin a Priority 1 restoration continuing until the confluence with Hall Creek. T8A also begins at a headcut, which will be stabilized, and from that point the stream will be brought up as a Priority 1 restoration until the confluence with T8. 6.10 Tributary 9 T9 will consist of the restoration of 129 lf. Due to the short length of the stream within the project, a Priority 2 approach is necessary. The design focuses on creating a transition from a new upstream crossing, which will replace a currently deteriorating crossing, to the confluence with UTHC. 6.11 Regenerative Stormwater Conveyances As part of the restoration of the whole project watershed, we are installing three RSCs. They will be installed in key locations where severe erosion is occurring and where storm flows are expected to need continued treatment from land uses outside of the easement boundaries. The RSCs will also provide grade control in these steep areas. Each of the RSCs will contain biofiltration components that will enhance nutrient cycling and serve as a sink for detrimental pollutants before they reach project streams. These structures will consist of a sand/mulch mixture overlaid with riffle stone (see Section 12.1 for RSC structural details). Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 29 The RSCs are designed to be self‐sustaining. Throughout the life of these structures, they will go through an evolution, which starts as a cascade/pool system that stores and filters stormwater in the underlying media and then evolves to a cascade/wetland system that treats the water in pocket wetland pools as the pore space in the underlying media fills. This evolution will occur over different timescales depending on the conditions at each RSC. This evolution of function and self‐sustaining quality makes these structures ideal for this project. 6.12 Crossings Ten culverted crossings and one bridge crossing will be installed as part of the project, four on UTHC and the remainder on T1, T5, T6, T6A (upstream of easement), T7 (bridge upstream of easement), T8, and T9 (upstream of easement). The crossings will be fenced as necessary to exclude livestock. The culverts have been designed to be embedded 1’ below the proposed streambed elevation to allow aquatic organism passage and will have floodplain drain pipes to connect flows on either side of the crossing during large events. These crossing locations are included on Figure 8. ") ") ") ") ") ") ") ") ")") ") ") ") ") ") T1 T1A UTHC1 Top T4 T5 T5A T5B T5 T1 T6T7 UTHCT3 T9 UTHC T8AT8 UTHC1 Bottom UTHC2 UTHC3 Ditch 1 RSC Ditch 2 RSC T2-1 T6-1 T6A-1 T8-1 UTHC4-1 UTHC4-2 UTHC4-3 UTHC4-4 T2-2 T6-2 T6A-2 T7-2 T8-2 NCCGIAFigure 8. Project Asset Map, Mill Dam Creek, Yadkin County, NC Proposed Easement (40.2 ac)Stream Mitigation Restoration (7,165 lf / 7,165 SMCs) Enhancement I (2,209 lf / 1,472 SMCs) Enhancement II (1,018 lf / 407 SMCs) Ephemeral Drainages or Other Ditches Exceptions Regenerative Stormwater Conveyances (3) ")Existing Culvert ")Proposed Bridge ")Proposed Culverts ")Utility Exceptions Ü 0 550275Feet Image Source: NC OneMap Orthoimagery, 2014. 30 Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 31 6.13 Design Determination KCI conducted bankfull verification by locating four reference cross‐sections on‐site that had stable bankfull indicators (see Figure 7 for locations). Using these o n‐site field measurements, we developed our own local curve relating drainage area and cross‐sectional area (cross‐sectional area had a higher R value than discharge for this site). This curve was compared to the rural Piedmont regional curve estimates for cross‐sectional area (Harman et al., 1999). A summary of the bankfull verification is provided in the table below. Based on the results, we used our local curve rather than the North Carolina rural Piedmont curve for our design values. Table 6. Local Curve Bankfull Determination Cross‐Section Location Acres Drainage Area (Sq. Miles) Field XS Area (sf) XS Area Estimate (sf) from Local Regional Curve Q (cfs) T8 XS1 13.1 0.020 2.5 2.4 13.8 T1 XS2 42.9 0.067 3.8 4.0 13.6 UTHC XS2 52.6 0.082 4.0 4.4 15.6 UTHC XS4 127.8 0.200 7.3 6.6 37.4 Figure 9. Local Curve for Bankfull Area Determination Regional curve y = 21.433x0.6761 KCI curve y = 13.775x0.4545 R² = 0.9511 1 10 100 1000 0.01 0.1 1 10 100 1000Cross‐Sectional Area (square feet)Drainage Area (square miles) Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 32 6.14 Sediment In order to analyze the existing sediment conditions within the project stream, 18 pebble counts were completed across the site and 2 bulk samples were done on UTHC for trend analysis. These data are provided in Section 12.2 and summarized in Table 7 below. The sediment sampling shows that the predominant sizes in the gravel range through the project streams. Bedrock exists along UTHC2 and UTHC4, and is scattered throughout the tributaries. Based on the sampling and site observations, we determined that UTHC has an active bed system with a moderate supply of incoming gravel. The remainder of the project streams all have small watershed areas that drain to them and are supply limited. Currently, active slope or bank erosion is contributing finer gravels and sands to the project streams, and these sources will be stabilized during the project restoration. The easement encompasses the majority of the headwaters for this system and will reduce or eliminate channel erosion. As a result, the project’s headwater tributaries will function as threshold channels, which is defined as a stream where the bed material inflow is negligible and the channel boundary is immobile even at high flows (Shields et al. 2003). As opposed to an active bed system, a threshold channel never achieves full sediment transport; the system only achieves partial sediment transport. Based on the collected sediment and cross‐section data, average shear stress and critical shear stress values were calculated to compare the existing conditions to the proposed riffle cross‐section designs. The shear stress values for the designed reaches were calculated and related to the movement of a particular grain size using Shield’s threshold of motion curve (Shields et al. 1936). For the existing cross‐ sections, the calculations showed that for UTHC, the average shear stress and critical shear stress based on existing bed material are similar. We will harvest and retain as much of the natural gravel along UTHC as we can to seed the new riffles. The smaller headwater streams, particularly those with smaller existing bed material, such as T1A, T4, T6, T8A, and T9, may experience larger average shear stresses than the critical shear stress based on the smaller types of sediment in these headwater areas. The restoration of these areas will reduce the upstream sediment supply from slope and bank erosion through the installation of the RSCs at the top of T1A and T4 as well as the stabilization at the heads of the other tributaries. In addition, we will install bed and bank protection in these upper reaches to protect the channels from erosion and excessive scour. Table 7 presents the results from sediment sampling at the site and the calculated shear stresses across the project streams. The project design aimed to reduce average shear stress across all of the channels. However, higher slopes in the upper reaches create average shear stresses greater than the critical shear stress of the existing bed material; as a result, we have included grade control structures, constructed riffles, and bank protection, among other features, to prevent excessive mobilization of smaller material. Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 33 Table 7. Sediment Results and Shear Stress Comparison. Reach Type Cross‐ Section ID Avg Shear Stress (lb/sf) Predicted Grain Diam. (mm) Measured D50 (mm) Measured D84 (mm) Modif. Critical Shear Stress (lb/sf) UTHC1 (Top) Existing UTHC XS2 0.47 36 37 97 0.832 UTHC1 (Bottom) Existing UTHC XS3 0.89 69 12 92 0.327 UTHC2 Existing UTHC XS4 1.03 80 5.2 55 0.149 UTHC2 Existing UTHC XS5 0.82 63 16 65 0.385 UTHC3 Existing UTHC XS6 0.82 63 26 67 0.546 UTHC3 Existing UTHC XS6 0.82 63 13.6 30.1 0.256 UTHC4 Existing UTHC XS7 0.71 54 21 86 0.507 UTHC4 Existing UTHC XS7 0.71 54 20.4 44.4 0.408 T1A Existing T1A 0.51 38 0.13 2.9 0.004 T1 Existing T1 XS1 0.93 72 2.8 38 0.080 T1 Existing T1 XS3 0.87 67 0.062 25 N/A T2 Existing T2 0.98 77 21 58 0.451 T3 Existing T3 1.03 80 25 130 0.649 T4 Existing T4 1.34 106 0.21 4.3 0.007 T6 Existing T6 1.31 104 4.1 13 0.082 T7 Existing T7 1.20 94 22 66 0.484 T8A Existing T8A 0.91 71 0.062 0.062 0.001 T8 Existing T8 XS1 1.11 87 8.5 81 0.248 T8 Existing T8 XS2 1.40 111 1.4 30 0.046 T9 Existing T9 1.28 101 0.15 0.23 0.002 UTHC1 Proposed UTHC1 (Top) 0.79 61 37 97 0.832 UTHC1 Proposed UTHC1 (Bottom) 0.85 66 12 92 0.327 UTHC3 Proposed UTHC3 0.74 57 26 67 0.546 T1 Proposed T1 0.82 63 2.8 38 0.080 T1A Proposed T1A 0.81 63 0.13 2.9 0.004 T2 Proposed T2 0.96 75 21 58 0.451 T3 Proposed T3 1.34 106 25 130 0.649 T4 Proposed T4 0.79 61 0.21 4.3 0.007 T5 Proposed T5 0.79 61 N/A N/A N/A T6 Proposed T6 0.92 72 4.1 13 0.082 T6A Proposed T6A 2.09 168 N/A N/A N/A T7 Proposed T7 0.75 58 22 66 0.484 T8A Proposed T8A 0.96 75 0.062 0.062 0.001 T8 Proposed T8 1.27 100 8.5 81 0.248 T9 Proposed T9 1.13 88 0.15 0.23 0.002 Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 34 6.15 Morphological Essential Parameters Tables Table 8. Morphological Essential Parameters for UTHC‐1 (Top) Parameter Existing Condition Reference Condition Proposed Valley Width (ft) 15‐50 N/A 28‐60 Contributing Drainage Area (acres) 53 Variable 53 Channel/Reach Classification F4 B4c C4 Design Discharge Width (ft) 5.8‐10.6 9.0‐10.0 6.5 Design Discharge Depth (ft) 0.4‐0.8 1.1‐1.2 0.5 Design Discharge Area (ft2) 2.8‐4.5 10.4‐10.7 3.4 Design Discharge Velocity (ft/s) 3.8‐5.1 4.1‐4.5 4.3 Design Discharge (cfs) 11‐16 42‐46 15 Water Surface Slope 0.021 0.013 0.025 Sinuosity 1.2 1.2 1.2 Width/Depth Ratio 7.6‐28.2 8‐10 12.4 Bank Height Ratio 1‐10.4 1.0 1.0 Entrenchment Ratio 1.2‐2.6 1.3‐2.3 7.7 d16 / d35 / d50 / d84 / d95 / dip / disp (mm) 1.3/18/37/97/130/‐0.38/15.5 Gravel Gravel Table 9. Morphological Essential Parameters for UTHC‐1 (Bottom) Parameter Existing Condition Reference Condition Proposed Valley Width (ft) 15‐50 N/A 28‐60 Contributing Drainage Area (acres) 114 Variable 114 Channel/Reach Classification F4 B4c C4 Design Discharge Width (ft) 5.8‐10.6 9.0‐10.0 9.0 Design Discharge Depth (ft) 0.4‐0.8 1.1‐1.2 0.7 Design Discharge Area (ft2) 2.8‐4.5 10.4‐10.7 6.1 Design Discharge Velocity (ft/s) 3.8‐5.1 4.1‐4.5 4.6 Design Discharge (cfs) 11‐16 42‐46 28 Water Surface Slope 0.021 0.013 0.021 Sinuosity 1.2 1.2 1.2 Width/Depth Ratio 7.6‐28.2 8‐10 13.4 Bank Height Ratio 1‐10.4 1.0 1.0 Entrenchment Ratio 1.2‐2.6 1.3‐2.3 5.6 d16 / d35 / d50 / d84 / d95 / dip / disp (mm) 1.3/18/37/97/130/‐0.38/15.5 Gravel Gravel Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 35 Table 10. Morphological Essential Parameters for UTHC3 Parameter Existing Condition Reference Condition Proposed Valley Width (ft) 16‐55 N/A 40‐80 Contributing Drainage Area (acres) 297 Variable 297 Channel/Reach Classification F4 B4c C4 Design Discharge Width (ft) 14.1 9.0‐10.0 12.0 Design Discharge Depth (ft) 0.8 1.1‐1.2 0.9 Design Discharge Area (ft2) 11.7 10.4‐10.7 11.4 Design Discharge Velocity (ft/s) 4.4 4.1‐4.5 4.6 Design Discharge (cfs) 51 42‐46 52 Water Surface Slope 0.014 0.013 0.015 Sinuosity 1.2 1.2 1.2 Width/Depth Ratio 17 8‐10 12.7 Bank Height Ratio 3.2 1.0 1.0 Entrenchment Ratio 1.2 1.3‐2.3 5.7 d16 / d35 / d50 / d84 / d95 / dip / disp (mm) 2.7/15/26/40/92/‐0.24/6.1 Gravel Gravel Table 11. Morphological Essential Parameters for T1 Parameter Existing Condition Reference Condition Proposed Valley Width (ft) 15‐35 N/A 30‐40 Contributing Drainage Area (acres) 43 Variable 43 Channel/Reach Classification B4, C4, G4 B4c C4b Design Discharge Width (ft) 4.1‐7.5 N/A 6.5 Design Discharge Depth (ft) 0.5‐0.7 N/A 0.5 Design Discharge Area (ft2) 2.7‐3.8 N/A 3.4 Design Discharge Velocity (ft/s) 3.6‐4.9 N/A 4.3 Design Discharge (cfs) 13‐14 N/A 15 Water Surface Slope 0.026 N/A 0.026 Sinuosity 1.1 1.1‐1.3 1.1 Width/Depth Ratio 6.2‐14.9 12‐18 12.4 Bank Height Ratio 1‐4.5 1.0‐1.1 1.0 Entrenchment Ratio 1.5‐4.4 2.2+ 5.4 d16 / d35 / d50 / d84 / d95 / dip / disp (mm) 0.13/0.37/3/38/66/‐0.06/17.6 Gravel Gravel Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 36 Table 12. Morphological Essential Parameters for T1A Parameter Existing Condition Reference Condition Proposed Valley Width (ft) 7‐20 N/A 25‐35 Contributing Drainage Area (acres) 29 Variable 29 Channel/Reach Classification F4 B4c C4b Design Discharge Width (ft) 7.1 N/A 5.5 Design Discharge Depth (ft) 0.4 N/A 0.5 Design Discharge Area (ft2) 2.8 N/A 2.5 Design Discharge Velocity (ft/s) 3.4 N/A 4.2 Design Discharge (cfs) 10 N/A 11 Water Surface Slope 0.022 N/A 0.030 Sinuosity 1.1 1.1‐1.3 1.1 Width/Depth Ratio 18.2 12‐18 12.1 Bank Height Ratio 19.6 1.0‐1.1 1.0 Entrenchment Ratio 1.1 2.2+ 6.4 d16 / d35 / d50 / d84 / d95 / dip / disp (mm) 0.062/0.072/0.13/2.9/71/0.4/12.2 Gravel Gravel Table 13. Morphological Essential Parameters for T2‐2 Parameter Existing Condition Reference Condition Proposed Valley Width (ft) 10‐20 N/A 20‐30 Contributing Drainage Area (acres) 16 Variable 16 Channel/Reach Classification G4 B4c C4b Design Discharge Width (ft) 3.1 N/A 4.5 Design Discharge Depth (ft) 0.5 N/A 0.4 Design Discharge Area (ft2) 1.5 N/A 1.7 Design Discharge Velocity (ft/s) 4.7 N/A 4.5 Design Discharge (cfs) 6 N/A 8 Water Surface Slope 0.038 N/A 0.042 Sinuosity 1.1 1.1‐1.3 1.1 Width/Depth Ratio 6.3 12‐18 12.0 Bank Height Ratio 3.3 1.0‐1.1 1.0 Entrenchment Ratio 1.3 2.2+ 4.9 d16 / d35 / d50 / d84 / d95 / dip / disp (mm) 0.26/13/21/58/84/‐0.48/41.8 Gravel Gravel Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 37 Table 14. Morphological Essential Parameters for T3 Parameter Existing Condition Reference Condition Proposed Valley Width (ft) 6‐20 N/A 15‐25 Contributing Drainage Area (acres) 7 Variable 7 Channel/Reach Classification G4 B4c C4b Design Discharge Width (ft) 3.5 N/A 4.5 Design Discharge Depth (ft) 0.3 N/A 0.4 Design Discharge Area (ft2) 1.1 N/A 1.7 Design Discharge Velocity (ft/s) 4.4 N/A 5.3 Design Discharge (cfs) 5 N/A 9 Water Surface Slope 0.059 N/A 0.059 Sinuosity 1.1 1.1‐1.3 1.1 Width/Depth Ratio 11.3 12‐18 12.0 Bank Height Ratio 3.3 1.0‐1.1 1.0 Entrenchment Ratio 1.2 2.2+ 4 d16 / d35 / d50 / d84 / d95 / dip / disp (mm) 0.062/3.1/25/130/240/‐0.52/204.2 Gravel Gravel Table 15. Morphological Essential Parameters for T4 Parameter Existing Condition Reference Condition Proposed Valley Width (ft) 6‐13 N/A 10‐19 Contributing Drainage Area (acres) 3 Variable 3 Channel/Reach Classification B4 B4c C4b Design Discharge Width (ft) 2.5 N/A 4.5 Design Discharge Depth (ft) 0.3 N/A 0.4 Design Discharge Area (ft2) 0.7 N/A 1.7 Design Discharge Velocity (ft/s) 5.2 N/A 5.3 Design Discharge (cfs) 3 N/A 9 Water Surface Slope 0.089 N/A 0.113 Sinuosity 1.0 1.1‐1.3 1.0 Width/Depth Ratio 9.4 12‐18 12.0 Bank Height Ratio 6.9 1.0‐1.1 1.0 Entrenchment Ratio 1.9 2.2+ 3.6 d16 / d35 / d50 / d84 / d95 / dip / disp (mm) 0.11/0.16/0.21/4.3/120/0.41/11.2 Gravel Gravel Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 38 Table 16. Morphological Essential Parameters for T6‐2 Parameter Existing Condition Reference Condition Proposed Valley Width (ft) 10‐30 N/A 27‐35 Contributing Drainage Area (acres) 29 Variable 29 Channel/Reach Classification G4 B4c C4b Design Discharge Width (ft) 4.4 N/A 5.5 Design Discharge Depth (ft) 0.6 N/A 0.5 Design Discharge Area (ft2) 2.6 N/A 2.5 Design Discharge Velocity (ft/s) 3.9 N/A 4.5 Design Discharge (cfs) 10 N/A 11 Water Surface Slope 0.041 N/A 0.034 Sinuosity 1.0 1.1‐1.3 1.1 Width/Depth Ratio 7.5 12‐18 12.1 Bank Height Ratio 4.4 1.0‐1.1 1.0 Entrenchment Ratio 1.1 2.2+ 4.4 d16 / d35 / d50 / d84 / d95 / dip / disp (mm) 0.19/1.6/4.1/13/27/‐0.31/12.4 Gravel Gravel Table 17. Morphological Essential Parameters for T6A‐2 Parameter Existing Condition Reference Condition Proposed Valley Width (ft) 20‐30 N/A 22‐30 Contributing Drainage Area (acres) 9 Variable 9 Channel/Reach Classification N/A B4c C4b Design Discharge Width (ft) * N/A 4.5 Design Discharge Depth (ft) * N/A 0.4 Design Discharge Area (ft2) * N/A 1.7 Design Discharge Velocity (ft/s) * N/A 6.6 Design Discharge (cfs) * N/A 11 Water Surface Slope * N/A 0.091 Sinuosity * 1.1‐1.3 1.1 Width/Depth Ratio * 12‐18 12.0 Bank Height Ratio * 1.0‐1.1 1.0 Entrenchment Ratio * 2.2+ 5.3 d16 / d35 / d50 / d84 / d95 / dip / disp (mm) * Gravel Gravel * Existing conditions are ponded. Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 39 Table 18. Morphological Essential Parameters for T7‐2 Parameter Existing Condition Reference Condition Proposed Valley Width (ft) 16‐26 N/A 17‐32 Contributing Drainage Area (acres) 41 Variable 41 Channel/Reach Classification G4 B4c C4b Design Discharge Width (ft) 3.2 N/A 6.5 Design Discharge Depth (ft) 0.8 N/A 0.5 Design Discharge Area (ft2) 2.4 N/A 3.4 Design Discharge Velocity (ft/s) 5.3 N/A 4.2 Design Discharge (cfs) 13 N/A 14 Water Surface Slope 0.033 N/A 0.024 Sinuosity 1.1 1.1‐1.3 1.1 Width/Depth Ratio 4.1 12‐18 12.4 Bank Height Ratio 1.7 1.0‐1.1 1.0 Entrenchment Ratio 1.4 2.2+ 4.3 d16 / d35 / d50 / d84 / d95 / dip / disp (mm) 1.2/7.9/22/66/89/‐0.30/10.7 Gravel Gravel Table 19. Morphological Essential Parameters for T8‐2 Parameter Existing Condition Reference Condition Proposed Valley Width (ft) 10‐20 N/A 17‐37 Contributing Drainage Area (acres) 21 Variable 21 Channel/Reach Classification G4 B4c C4b Design Discharge Width (ft) 3.6 N/A 5.5 Design Discharge Depth (ft) 0.7 N/A 0.5 Design Discharge Area (ft2) 2.4 N/A 2.5 Design Discharge Velocity (ft/s) 5.5 N/A 5.2 Design Discharge (cfs) 13 N/A 13 Water Surface Slope 0.044 N/A 0.045 Sinuosity 1.1 1.1‐1.3 1.1 Width/Depth Ratio 5.5 12‐18 12.1 Bank Height Ratio 2.5 1.0‐1.1 1.0 Entrenchment Ratio 1.1 2.2+ 4.4 d16 / d35 / d50 / d84 / d95 / dip / disp (mm) 0.13/2.2/8.5/81/140/‐0.25/37.5 Gravel Gravel Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 40 Table 20. Morphological Essential Parameters for T8A Parameter Existing Condition Reference Condition Proposed Valley Width (ft) 10‐23 N/A 14‐28 Contributing Drainage Area (acres) 7 Variable 7 Channel/Reach Classification G4 B4c C4b Design Discharge Width (ft) 3.1 N/A 4.5 Design Discharge Depth (ft) 0.3 N/A 0.4 Design Discharge Area (ft2) 1.0 N/A 1.7 Design Discharge Velocity (ft/s) 3.8 N/A 4.6 Design Discharge (cfs) 4 N/A 8 Water Surface Slope 0.052 N/A 0.044 Sinuosity 1.1 1.1‐1.3 1.1 Width/Depth Ratio 5.5 12‐18 12.0 Bank Height Ratio 2.7 1.0‐1.1 1.0 Entrenchment Ratio 1.1 2.2+ 4.4 d16 / d35 / d50 / d84 / d95 / dip / disp (mm) N/A Gravel Gravel Table 21. Morphological Essential Parameters for T9 Parameter Existing Condition Reference Condition Proposed Valley Width (ft) 10‐22 N/A 16‐32 Contributing Drainage Area (acres) 29 Variable 29 Channel/Reach Classification B4 B4c C4b Design Discharge Width (ft) 2.9 N/A 5.5 Design Discharge Depth (ft) 0.7 N/A 0.5 Design Discharge Area (ft2) 2.0 N/A 2.5 Design Discharge Velocity (ft/s) 4.9 N/A 5.0 Design Discharge (cfs) 10 N/A 12 Water Surface Slope 0.039 N/A 0.042 Sinuosity 1.0 1.1‐1.3 1.1 Width/Depth Ratio 4.3 12‐18 12.1 Bank Height Ratio 1.7 1.0‐1.1 1.0 Entrenchment Ratio 1.9 2.2+ 4.0 d16 / d35 / d50 / d84 / d95 / dip / disp (mm) 0.062/0.13/0.15/0.23/3.7/‐0.13/2.0 Gravel Gravel Final Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 41 6.16 Planting All unforested portions of the project easement will be planted to establish a forested riparian buffer. The planting plan is shown in the attached project plan sheets (Sec tion 12.1). Trees and shrubs will be planted at a density of 968 stems per acre (9 feet x 5 feet spacing) in an area of approximately 19.6 acres to achieve a mature survivability of 210 stems per acre after seven years. Woody vegetation planting will be conducted during dormancy. Species to be planted may consist of the following shown in two separate zones. Zone 1 Common Name Scientific Name Wetland Status (Eastern Mts & Piedmont) River Birch Betula nigra FACW Green Ash Fraxinus pennsylvanica FACW Tulip Poplar Liriodendron tulipifera FACU American Sycamore Platanus occidentalis FACW Swamp Chestnut Oak Quercus michauxii FACW Willow Oak Quercus phellos FAC Zone 2 Common Name Scientific Name Wetland Status (Eastern Mts & Piedmont) American Persimmon Diospyros virginiana FAC Tulip Poplar Liriodendron tulipifera FACU White Oak Quercus alba FACU Southern Red Oak Quercus falcata FACU Pin Oak Quercus palustris FACW Willow Oak Quercus phellos FAC On the restored stream banks, live stakes will be used to provide natural stabilization. Species identified for live staking include: Common Name Scientific Name Silky Dogwood Cornus amomum Black Willow Salix nigra Silky Willow Salix sericea Common Elderberry Sambucus canadensis A custom herbaceous seed mix composed of native species will also be developed and used to further stabilize and restore the site. 6.17 Project Assets The tables below outline the anticipated project assets that will be produced from the MDCRS project and are shown in Figure 8. Mill Dam Creek Restoration Site Draft Mitigation Plan September 25, 2018 DMS Project Number 97136 42 Table 22. Project Asset Table Project Component ‐or‐ Reach ID Existing Footage/ Acreage Stationing Restoration Footage or AcreageCreditable Footage or Acreage Restoration Level Approach Priority Level MitigationRatio (X:1)Mitigation Credits Notes/Comments UTHC1 Top 1,333 10+00‐22+81 1,281 1,249 R P2 10+00‐11+50, then P1 1 1,249 Crossing Exception STA 20+51 ‐ 20+83 UTHC1 Bottom 541 22+81‐27+39 457 438 R P1, then P2 24+50‐27+39 1 438 Crossing Exception STA 25+72 ‐ 25+91 UTHC2 1,494 27+39‐42+32 1,493 1,493 EI N/A 1.5 995 UTHC3 1,411 42+32‐55+57 1,325 1,240 R P1 except P2 42+32‐44+00 and 53+50‐55+571 1,240 Utility Exception STA 54+07 ‐ 54+49; Crossing Exception STA 55+14 ‐ 55+57 UTHC4‐1 1,840 55+57‐58+53 297 297 EI N/A 1.5 198 UTHC4‐2 58+53‐63+75 521 521 EII N/A 2.5 208 UTHC4‐3 63+75‐68+55 481 419 EI N/A 1.5 279 Crossing Exception STA 63+75 ‐ 64+37 UTHC4‐4 68+55‐73+97 542 497 EII N/A 2.5 199 Utility Exception STA 68+55 ‐ 69+00 T1 764 100+00‐107+51 751 734 R P2 100+00‐101+80, then P1 1 734 Crossing Exception STA 104+00 ‐ 104+16 T1A 746 150+00‐157+95 795 795 R P2 1 795 T2‐1 499 200+00‐204+98 498 498 EII N/A 2.5 199 T2‐2 232 204+98‐207+63 265 265 R P2 1 265 T3 378 300+00‐303+69 369 369 R P1/P2 1 369 T4 151 400+00‐401+51 151 151 R P1 1 151 T5 1,205 1000+00‐1012+13 1,213 1,182 EII N/A 2.5 473 Crossing Exception STA 1003+59 ‐ 1003+90 Mill Dam Creek Restoration Site Draft Mitigation Plan September 25, 2018 DMS Project Number 97136 43 Table 22. Project Asset Table, continued Project Component ‐or‐ Reach ID Existing Footage/ Acreage Stationing Restoration Footage or AcreageCreditable Footage or Acreage Restoration Level Approach Priority Level MitigationRatio (X:1)Mitigation Credits Notes/Comments T5A 65 1200+00‐1200+65 65 65 EII N/A 2.5 26 T5B 438 1300+00‐1304+38 438 438 EII N/A 2.5 175 T6‐1 325 600+00‐603+22 322 259 EII N/A 2.5 103 Crossing Exception STA 602+59 ‐ 603+22 T6‐2 621 603+22‐609+80 658 658 R P1 1 658 T6A‐1 60 650+00‐650+60 60 61 EII N/A 2.5 24 T6A‐2 97 650+60‐651+61 101 101 R P1 1 101 T7‐2 165 700+00‐701+65 165 165 EII N/A 2.5 66 T7‐2 335 701+65‐705+13 348 348 R P1 1 348 T8‐1 445 800+00‐804+45 445 445 EII N/A 2.5 178 T8‐2 486 804+45‐808+94 448 426 R P1 1 426 Crossing Exception STA 808+20 ‐ 808+42 T8A 258 850+00‐852+63 263 263 R P1 1 263 T9 133 900+00‐901+29 129 129 R P1, then P2 900+71‐901+29 1 129 TOTAL 14,024 13,882 13,506 10,290 Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 44 Table 23. Length and Summations by Mitigation Category Restoration Level Stream (linear feet) Riparian Wetland (acres) Non‐riparian Wetland (acres) Buffer (square feet) Riverine Non‐ Riverine Restoration 7,165 Enhancement Enhancement I 2,208 Enhancement II 4,132 Creation Preservation High Quality Preservation Table 24. Overall Assets Summary Mill Dam Creek Restoration Site (Project ID ‐ 97136) Overall Assets Summary Asset Category Overall Credits Stream 10,290 RP Wetland NR Wetland Buffer Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 45 7.0 PERFORMANCE STANDARDS Monitoring of the MDCRS shall occur for a minimum of seven years following construction. The following performance standards for stream mitigation are based on the Wilmington District Stream and Wetland Compensatory Mitigation Update (NCIRT 2016) and will be used to judge site success. Vegetation Performance The site must achieve a woody stem density of 260 stems/acre after five years and 210 stems/acre after seven years to be considered successful. Trees in each plot must average 7 feet in height at Year 5 and 10 feet at Year 7. A single species may not account for more than 50% of the required number of stems within any plot. Volunteers must be present for a minimum of two growing seasons before being included performance standards in Year 5 and Year 7. For any volunteer tree stem to count toward vegetative success, it must be a species from the approved planting list included in Section 6.16. If monitoring indicates that any of these standards are not being met, corrective actions will take place. Stream Hydrologic Performance During the monitoring period, a minimum of four bankfull events must be recorded within the seven‐year monitoring period for the project streams. These bankfull events must occur in separate monitoring years. Bankfull events will be verified using automatic stream monitoring gauges on UTHC1 and UTHC3 to record daily stream depth readings. The project streams must also show a minimum of 30 continuous flow days within a calendar year (assuming normal precipitation). A “normal” year will be based on NRCS climatological data for Yadkin County with the 30th to 70th percentile thresholds as the range of normal, as documented in the USACE Technical Report “Accessing and Using Meteorological Data to Evaluate Wetland Hydrology, April 2000.” Stream Geomorphology Performance The site’s geomorphology for all reaches will be monitored per the NCIRT 2016 monitoring guidelines. The bank height ratio (BHR) should not exceed 1.2 and the entrenchment ratio (ER) must not fall below 2.2 for C and E channels. BHR and ER at any measured riffle cross‐section should not change by more than 10% from the baseline condition during any given monitoring interval (e.g., no more than 10% between years 1 and 2, 2 and 3, 3 and 5, or 5 and 7). There will be an overall assessment for each reach to distinguish localized versus systemic concerns for that stream. Adjustment and lateral movement following construction and as the channel settles over the monitoring period are to be expected. Geomorphological measurements of cross‐sections will be used to determine if any adjustments that occur are out of the range typically expected for this type of stream. 8.0 MONITORING PLAN Monitoring of the MDCRS shall consist of the collection and analysis of stream hydrology, stability, and vegetation survivability data to support the evaluation of the project in meeting established performance standards described above. The Proposed Monitoring Plan in Figure 10 shows the proposed locations of monitoring features described below. Vegetation Monitoring Vegetation monitoring will take place between July 1st and leaf drop. The success of the riparian buffer plantings will be evaluated using thirty 0.02‐acre square or rectangular plots within the planted stream buffer. Fifteen plots will be permanently installed, while the remainder will be randomly placed at the Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 46 time of each monitoring visit. Vegetation must be planted and plots established at least 180 days prior to the start of the first year of monitoring. In the permanent plots, the plant’s height, species, location, and origin (planted versus volunteer) will be noted. In the random plots, species and height will be recorded. In all plots, invasive stems will also be recorded to determine the percentage of invasive stems present. Additionally, a photograph will be taken of each plot. Beginning at the end of the first growing season, the site’s vegetation will be monitored in years 1, 2, 3, 5, and 7. Stream Hydrologic Monitoring Bankfull events on‐site will be verified using two automatic stream monitoring gauges on UTHC1 and UTHC 3. Additional gauges and/or recording devices such as cameras (set to record a photo or video a minimum of once per day) will be installed on T1A and in other locations as needed to document the presence of flow. Stream Geomorphology Monitoring For stream monitoring, the purpose of monitoring is to evaluate the stability of the restored stream. Following the procedures established in the USDA Forest Service Manual, Stream Channel Reference Sites (Harrelson et al. 1994) and the methodologies utilized in the Rosgen stream assessment and classification system (1994 and 1996), data collected will consist of detailed dimension measurements, longitudinal profiles, and bed materials sampling. Dimension Thirty‐two permanent cross‐sections (24 riffles and 8 pools) will be established throughout the site to capture each reach that is being either restored or completed with Enhancement I. More riffle cross‐ sections will be used given the amount of Enhancement I reaches on the project. The distribution of the cross‐sections is as follows and as shown on Figure 10: UTHC1 Top (2 riffles and 1 pool), UTHC1 Bottom (1 riffle and 1 pool), UTHC2 (2 riffles), UTHC3 (2 riffles and 1 pool), UTHC4‐1 (1 riffle), UTHC4‐3 (2 riffles), T1 (1 riffle and 1 pool), T1A (2 riffles), T2‐2 (1 riffle and 1 pool), T3 (1 riffle and 1 pool), T4 (1 riffle), T6‐2 (1 riffle and 1 pool), T6A‐2 (1 riffle), T7‐2 (1 riffle and 1 pool), T8‐2 (2 riffles), T8A (2 riffles), and T9 (1 riffle). The extents of each cross‐section will be recorded by either conventional survey or GPS. The cross‐ sectional surveys shall provide a detailed measurement of the stream and banks and will include points on the adjacent floodplain or valley, at the top of bank, bankfull, at all breaks in slope, the edge of water, and thalweg. Width/depth, bank height and entrenchment ratios, as well as bankfull cross‐sectional area, width, max depth and mean depth will be calculated for each riffle cross‐section based on the survey data. The BHR will be measured by using a constant bankfull area over the monitoring period and adjusting the bankfull elevation each monitoring event based on how this area fits in the cross‐sectional data. The revised bankfull elevation will then be used to calculate BHR along with the current low bank height. Width/depth ratios, bankfull cross‐sectional area, width, max depth and mean depth will be calculated for each pool cross‐section. Cross‐section measurements will take place in Years 1, 2, 3, 5, and 7. Profile Detailed longitudinal profile will be conducted along the lengths of all restoration reaches during the as‐ built survey. Measurements will include slopes (average, pool, and riffle) as well as calculations of pool‐ to‐pool spacing. No additional profile measurements will be taken during the monitoring period unless deemed necessary due to concerns about bed elevation adjustments. Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 47 Visual Assessment An annual site walk will be conducted at the end of each monitoring period to document any problem areas. Specific problem areas that could arise include excessive bank erosion, bed deposition or aggradation, problems with the installed structures, or sparse vegetative cover. The findings of the visual assessment as well as any recommended corrective actions for problem areas will be summarized in the monitoring reports by way of a Current Conditions Plan View (CCPV) figure. Photograph reference points (PRPs) will be established to assist in characterizing the site and to allow qualitative evaluation of the site conditions. The location of each photo point will be marked in the monitoring plan and the bearing/orientation of the photograph will be documented to allow for repeated use. Reporting Annual monitoring data will be reported using the most current DMS monitoring template from June 2017. The monitoring report shall provide a project data chronology that will facilitate an understanding of project status and trends, population of DMS databases for analysis, research purposes, and assist in decision making regarding project close‐out. The report will document the monitored components and include all collected data, analyses, and photographs. The first scheduled monitoring will be conducted during the first full growing season following project completion. The site will be monitored for performance standards for seven years after completion of construction. Full monitoring reports will be completed in Years 1, 2, 3, 5, and 7. Limited monitoring reports (CCPV, photos, stream gauge data, and site narrative) will be submitted in Years 4 and 6. Table 25. Monitoring Requirements Mill Dam Creek Restoration Site Required Parameter Quantity Frequency Notes Yes Pattern and Profile 7,165 lf (all restoration reaches) Once, during as‐ built survey Additional measurements in later years may be taken as necessary. Yes Stream Dimension 32 cross‐sections (24 riffles, 8 pools) Monitoring Years 1, 2, 3, 5, and 7 Yes Stream Hydrology 2 pressure transducer gauges; 1 other gauge or camera on T1A Annual – throughout year 1 on UTHC1, 1 on UTHC3, and 1 on T1A Yes Vegetation 30 vegetation monitoring plots Monitoring Years 1, 2, 3, 5, and 7 15 permanently fixed, 15 randomly located each monitoring visit Yes Exotic and nuisance vegetation Annual Locations of invasive vegetation will be mapped* Yes Project boundary Semi‐annual Locations of vegetation damage, boundary encroachments, etc. will be mapped * See Section 12.10 for proposed invasive species management. " " " " " " " " " " " " " " " T1 T1A UTHC1 Top T2-1 T4 T5 T5A T5BT5 T1 T6-1 T6A-1 T6T7-1 UTHCT3 T9 UTHC T8A T8-1 T8 Begin UTHC Top UTHC1 Bottom UTHC2 UTHC3 UTHC4-1 Install 2nd Stream Gauge on UTHC Install 1st Stream Gauge on UTHC Install T1A Stream Gauge UTHC4-2 UTHC4-3 UTHC4-4 T2-2 T6-2 T6A-2 T7-2 T8-2 NCCGIA Ü0 550275Feet Figure 10. Proposed Monitoring, Mill Dam Creek, Yadkin County, NC Image Source: NC OneMap Orthoimagery, 2014. Proposed Easement (40.2 ac) Proposed Monitoring XS (32) "Proposed Veg Plots (15 permanent) Restoration Enhancement I Enhancement II Ephemeral or Other Ditches Exceptions 48 Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 49 9.0 ADAPTIVE MANAGEMENT PLAN In the event the mitigation site or a specific component of the mitigation site fails to achieve the necessary performance standards as specified in the mitigation plan, KCI shall notify the members of the IRT and work with the IRT to develop contingency plans and remedial actions. 10.0 LONG‐TERM MANAGEMENT PLAN The site will be transferred to the NCDEQ Stewardship Program. This party shall serve as conservation easement holder and long‐term steward for the property and will conduct periodic inspection of the site to ensure that restrictions required in the conservation easement are upheld. Funding will be supplied by the responsible party on a yearly basis until such time an endowment is established. The NCDEQ Stewardship Program is developing an endowment system within the non‐reverting, interest‐bearing Conservation Lands Conservation Fund Account. The use of funds from the Endowment Account will be governed by North Carolina General Statue GS 113A‐232(d)(3). Interest gained by the endowment fund may be used for the purpose of stewardship, monitoring, stewardship administration, and land transaction costs, if applicable. The Stewardship Program will periodically install signage as needed to identify boundary markings as needed. Any fencing or permanent crossings will be the responsibility the owner of the underlying fee to maintain. Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 50 11.0 REFERENCES CITED Griffith, G., J. Omernik, and J. Comstock. 2002. Ecoregions of North Carolina, Regional Descriptions. US E.P.A. Last accessed at: https://archive.epa.gov/wed/ecoregions/web/html/ncsc_eco.html Harman, W.A., G.D. Jennings, J.M. Patterson, D.R. Clinton, L.O. Slate, A.G. Jessup, J. R. Everhart, and R.E. Smith. 1999. Bankfull Hydraulic Geometry Relationships for North Carolina Streams. Wildland Hydrology. AWRA Symposium Proceedings. Edited by D.S. Olsen and J.P. Potyondy. American Water Resources Association. June 30 – July 2, 1999. Bozeman, MT. Harman, W. and R. Starr. 2011. Natural Channel Design Review Checklist. US Fish and Wildlife Service, Chesapeake Bay Field Office, Annapolis, MD and US Environmental Protection Agency, Office of Wetlands, Oceans, and Watersheds, Wetlands Division. Washington, D.C. EPA 843‐B‐12‐005 Harman, W., R. Starr, M. Carter, K. Tweedy, M. Clemmons, K. Suggs, C. Miller. 2012. A Function‐Based Framework for Stream Assessment and Restoration Projects. US Environmental Protection Agency, Office of Wetlands, Oceans, and Watersheds, Washington, DC EPA 843‐K‐12‐006. Harrelson, C.C., C.L. Rawlins, and J.P. Potyondy. 1994. Stream Channel Reference Sites: an Illustrated Guide to Field Technique. Gen. Tech. Rep. RM‐245. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. NCDENR, Ecosystem Enhancement Program. 2005a. Local Watershed Plan for the Yadkin River Basin: Upper Uwharrie River Watershed. Raleigh, NC. Last accessed at: http://portal.ncdenr.org/c/document_library/get_file?uuid=915e0164‐8786‐4a36‐91b9‐ 8305515def02&groupId=60329 NCDENR, Ecosystem Enhancement Program. 2005b. Upper Uwharrie Local Watershed Plan: Fact Sheet. Raleigh, NC. Last accessed at: http://portal.ncdenr.org/c/document_library/get_file?uuid=80ebfb8a‐3478‐4ecf‐bac1‐ e888d8ddb563&groupId=60329 NCDEQ, Division of Mitigation Services. 2016. Quantifying Benefits to Water Quality from Livestock Exclusion and Riparian Buffer Establishment for Stream Restoration. Last accessed at: http://deq.nc.gov/about/divisions/mitigation‐services/dms‐vendors/rfp‐forms‐templates NCDEQ, Division of Mitigation Services. 2017. Annual Monitoring Report Format, Data Requirements, and Content Guidance. Last accessed at: https://ncdenr.s3.amazonaws.com/s3fs‐ public/Mitigation%20Services/Document%20Management%20Library/Guidance%20and%20Te mplate%20Documents/13_DMS_Mon_Rep_Templ_June_2017.pdf NCDEQ, Division of Water Resources. 2016 Draft 303(d) list. Raleigh, NC. Last accessed at: https://deq.nc.gov/about/divisions/water‐resources/planning/classification‐ standards/303d/303d‐files Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 51 NCDEQ, Division of Water Resources. 2018. Surface Water Classification. Last accessed at: http://deq.nc.gov/about/divisions/water‐resources/planning/classification‐ standards/classifications North Carolina Interagency Review Team. 2016. Wilmington District Stream and Wetland Compensatory Mitigation Update. Last accessed at: http://saw‐reg.usace.army.mil/PN/2016/Wilmington‐ District‐Mitigation‐Update.pdf Rosgen, D.L. 1994. A Classification of Natural Rivers. Catena 22: 169‐199. Rosgen, D. 1996. Applied River Morphology. Wildland Hydrology. Pagosa Springs, Colorado. Shields, FD Jr, RR Copeland, PC Klingeman, MW Doyle, and A Simon. 2003. Design for Stream Restoration. Journal of Hydraulic Engineering 129 (8), 575‐584. Shields, Ing. A., W. P. Ott, and J. C. Van Uchelen. 1936. Application of Similarity Principles and Turbulence Research to Bed‐load Movement. Pasadena, CA: Soil Conservation Service, California Institute of Technology. Simon, Andrew and Massimo Rinaldi. 2006. Disturbance, stream incision, and channel evolution: The roles of excess transport capacity and boundary materials in controlling channel response. Geomorphology, Volume 79, Issue 3‐4, p. 361‐383. Stream Mitigation Guidelines, April 2003, US Army Corps of Engineers Wilmington District. USGS. 2018. Metagraywacke and Muscovite‐Biotite Schist. https://mrdata.usgs.gov/geology/state/sgmc‐unit.php?unit=NCCAZmg;5 Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 52 Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 12.0 APPENDICES Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 12.1 Plan Sheets Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 PROJECT COMPONENTS – TOTAL CREDITS 10,290 Reach ID Proposed Stationing Existing Footage Approach Mitigation Ratio R Footage R ‐or‐ R Equivalent T1* 100+00 to 107+51 748 R 1:1 734 734 T1A 150+00 to 157+95 739 R 1:1 795 795 T2‐1 200+00 to 204+98 498 EII 2.5:1 498 199 T2‐2 204+98 to 207+63 265 R 1:1 265 265 T3 300+00 to 303+69 378 R 1:1 369 369 T4 400+00 to 401+51 151 R 1:1 151 151 T5* 1000+00 to 1012+13 1,174 EII 2.5:1 1,182 473 T5A 1200+00 to 1200+65 65 EII 2.5:1 65 26 T5B 1300+00 to 1304+38 438 EII 2.5:1 438 175 T6‐1* 600+00 to 602+59 259 EII 2.5:1 259 104 T6‐2 602+59 to 609+80 621 R 1:1 658 658 T6A‐1 650+00 to 650+60 60 EII 2.5:1 60 24 T6A‐2 650+60 to 651+61 97 R 1:1 101 101 T7‐1 700+00 to 701+65 165 EII 2.5:1 165 66 T7‐2 701+65 to 705+13 335 R 1:1 348 348 T8‐1* 800+00 to 804+45 445 EII 2.5:1 445 178 T8‐2 804+45 to 808+94 464 R 1:1 426 426 T8A 850+00 to 852+63 258 R 1:1 263 263 T9 900+00 to 901+29 133 R 1:1 129 129 UTHC1 Top* 10+00‐22+81 1,333 R 1:1 1,249 1,249 UTHC1 Bottom* 22+81‐27+39 541 R 1:1 438 438 UTHC2 27+39‐42+32 1,494 EI 1.5:1 1,493 995 UTHC3* 42+32‐55+57 1,411 R 1:1 1,240 1,240 UTHC4‐1 55+57‐58+53 1,840 EI 1.5:1 297 198 UTHC4‐2 58+53‐63+75 EII 2.5:1 521 208 UTHC4‐3* 63+75‐68+55 EI 1.5:1 419 279 UTHC4‐4* 68+55‐73+97 EII 2.5:1 497 199 * Crossings have been removed from creditable linear footage for all project streams. Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 12.2 Data Analysis/Supplemental Information and Maps Existing Conditions Cross‐Sections Pebble Counts and Bulk Sampling Stream Morphological Tables Reference Reach Data (UT Fisher River) Estimated Nutrient and Bacterial Reductions Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 Cross-Section PlotsStation Elevation0.0 949.87 946.054.7 950.04 950.259.7 950.27 2.813.4 950.25 7.914.5 948.73 946.4915.8 946.68 9.217.1 945.74 0.418.4 945.73 0.420.5 945.61 22.222.5 945.64 1.223.6 945.63 10.425.1 946.3026.4 947.7528.5 950.1530.1 950.9431.9 951.3634.0 951.4135.3 950.8836.6 950.5538.9 950.9842.1 952.2444.5 952.8248.2 953.14Mean Depth at Bankfull:30 acres12/1/2016A. French, T. SeelingerW / D Ratio:Entrenchment Ratio:Bank Height Ratio:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Bankfull Cross-Sectional Area:Date:Field Crew:Top of Bank Elevation:YadkinHall CreekUTHC1 TOP XS1River Basin:Watershed:XS IDBankfull Elevation:SUMMARY DATADrainage Area (sq mi):9459469479489499509519529539540 5 10 15 20 25 30 35 40 45 50Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, UTHC1 TOP XS1BankfullTop of BankFlood Prone AreaAssessment 12/1/16 Cross-Section PlotsStation Elevation0.0 936.67 933.174.9 936.61 933.177.6 936.45 4.08.9 936.33 10.611.2 936.33 933.9212.0 935.88 27.312.5 934.80 0.815.0 933.39 0.417.7 933.36 28.222.9 933.07 2.624.6 932.97 1.026.0 932.7427.4 932.7627.7 932.5828.5 932.4329.0 932.5329.6 932.4230.2 932.5031.2 932.6531.8 933.2232.8 933.5434.0 933.5739.7 933.7043.8 934.2546.9 934.6650.4 935.6152.7 936.2055.2 936.5359.6 936.9164.8 937.41Bank Height Ratio:Entrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Drainage Area (sq mi):53 acresDate:12/1/2016Field Crew:A. French, T. SeelingerRiver Basin:YadkinWatershed:Hall CreekXS IDUTHC1 TOP XS2 (REFERENCE)9329339349359369379380 102030405060Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, UTHC1 TOP XS2 (REFERENCE)BankfullTop of BankFlood Prone AreaAssessment 12/1/16 Cross-Section PlotsStation Elevation0.0 922.46 920.084.7 922.58 922.119.7 922.64 4.513.5 922.51 5.814.8 922.00 921.2416.4 920.91 9.017.8 919.12 1.218.6 919.06 0.819.3 918.92 7.620.2 919.01 1.521.1 919.19 2.721.9 919.7522.9 920.1024.5 920.9825.5 921.6526.5 922.1227.9 922.3029.6 922.4333.4 922.2536.7 922.0539.0 922.1641.3 922.9344.3 923.6046.5 923.7849.7 924.0252.8 924.68Bank Height Ratio:Entrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Drainage Area (sq mi):84 acresDate:12/1/2016Field Crew:A. French, T. SeelingerRiver Basin:YadkinWatershed:Hall CreekXS IDUTHC1 LOWER XS39189199209219229239249250 1020304050Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, UTHC1 LOWER XS3BankfullTop of BankFlood Prone AreaAssessment 12/1/16 Cross-Section PlotsStation Elevation0.0 910.24 906.573.4 909.67 906.575.6 908.83 7.37.5 907.48 9.99.0 906.72 907.9211.6 906.51 18.114.4 906.61 1.317.4 906.25 0.718.5 906.00 13.318.9 905.83 1.819.9 905.62 1.021.0 905.3621.6 905.2222.2 905.2223.9 905.5424.4 905.9025.0 907.9826.2 909.9028.2 910.6331.8 911.3334.5 911.64Bank Height Ratio:Entrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Drainage Area (sq mi):120 acresDate:11/22/2016Field Crew:A. French, T. SeelingerRiver Basin:YadkinWatershed:Hall CreekXS IDUTHC2 XS4 (REFERENCE)9049059069079089099109119120 5 10 15 20 25 30 35Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, UTHC2 XS4 (REFERENCE)BankfullTop of BankFlood Prone AreaAssessment 11/22/16 Cross-Section PlotsStation Elevation0.0 883.82 879.074.7 883.55 881.479.2 882.44 8.711.0 882.01 10.112.6 881.44 880.1813.9 879.52 12.314.9 878.56 1.115.8 878.15 0.917.4 877.96 11.719.3 878.04 1.220.8 878.01 3.222.4 878.0924.3 878.9325.6 879.9626.8 881.4829.6 881.6033.0 881.6139.3 881.56Bank Height Ratio:Entrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Drainage Area (sq mi):170 acresDate:12/1/2016Field Crew:A. French, T. SeelingerRiver Basin:YadkinWatershed:Hall CreekXS IDUTHC2 XS58778788798808818828838848850 5 10 15 20 25 30 35 40Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, UTHC2 XS5BankfullTop of BankFlood Prone AreaAssessment 12/1/16 Cross-Section PlotsStation Elevation0.0 864.97 861.854.8 864.82 864.339.6 864.76 11.710.8 864.49 14.111.5 864.01 862.9911.9 860.86 17.112.4 860.76 1.113.4 860.71 0.814.6 860.85 17.015.7 860.84 1.216.8 860.98 3.218.0 861.1019.0 861.0622.6 860.9225.0 861.5030.4 863.7032.9 864.3336.8 864.31River Basin:YadkinWatershed:Hall CreekXS IDUTHC3 XS6Drainage Area (sq mi):280 acresDate:12/1/2016Field Crew:A. French, T. SeelingerEntrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Bank Height Ratio:8608618628638648658660 5 10 15 20 25 30 35 40Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, UTHC3 XS6BankfullTop of BankFlood Prone AreaAssessment 12/1/16 Cross-Section PlotsStation Elevation0.0 846.15 841.216.8 846.05 841.9311.1 845.88 13.915.8 845.52 13.819.1 845.25 842.4021.7 844.87 20.224.5 844.51 1.225.6 844.31 1.026.6 843.00 13.727.4 842.22 1.528.2 841.14 1.629.4 840.2830.1 840.0831.0 840.2632.1 840.1033.3 840.1234.7 840.1135.7 840.1437.0 840.0838.1 840.0239.1 840.1040.7 840.1641.4 840.3242.1 841.4542.9 841.9444.8 841.7846.6 842.0447.9 842.6149.6 843.7651.5 844.6554.0 844.7955.6 844.6757.8 844.6861.2 844.5164.3 844.6370.1 844.5674.9 844.44River Basin:YadkinWatershed:Hall CreekXS IDUTHC4 XS7Drainage Area (sq mi):365 acresDate:12/1/2016Field Crew:A. French, T. SeelingerEntrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Bank Height Ratio:8398408418428438448458468470 10203040506070Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, UTHC4 XS7BankfullTop of BankFlood Prone AreaAssessment 12/1/16 Cross-Section PlotsStation Elevation0.0 99.65 97.355.7 100.23 100.588.4 100.66 12.511.7 100.62 7.813.7 100.42 99.3015.0 100.02 9.216.1 99.73 2.017.2 99.12 1.618.7 96.52 4.919.1 96.23 1.220.5 95.69 2.721.7 95.6422.8 95.4723.6 95.4524.8 95.4225.8 95.4026.0 97.3527.5 98.4929.1 99.7530.4 100.5131.4 100.5835.2 100.3343.3 100.02River Basin:YadkinWatershed:Hall CreekXS IDUTHC3 XS8Drainage Area (sq mi):280 acresDate:8/16/2018Field Crew:J. Sullivan, T. SeelingerEntrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Bank Height Ratio:95969798991001010 5 10 15 20 25 30 35 40 45Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, UTHC3 XS8BankfullTop of BankFlood Prone AreaAssessment 8/16/18 Cross-Section PlotsStation Elevation0.0 100.08 96.405.1 100.03 99.239.1 99.91 8.510.7 99.46 9.012.4 98.59 97.9514.0 97.92 10.814.7 95.57 1.616.1 94.97 0.918.0 94.85 8.418.9 95.21 1.419.9 95.34 2.820.9 95.8421.6 96.0522.8 96.0823.3 96.3124.2 96.9124.7 98.0325.8 98.3627.3 99.2328.3 99.2230.7 99.3635.8 99.5339.1 99.41River Basin:YadkinWatershed:Hall CreekXS IDUTHC3 XS9Drainage Area (sq mi):280 acresDate:8/16/2018Field Crew:J. Sullivan, T. SeelingerEntrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Bank Height Ratio:9495969798991001010 5 10 15 20 25 30 35 40Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, UTHC3 XS9BankfullTop of BankFlood Prone AreaAssessment 8/17/18 Cross-Section PlotsStation Elevation0.0 954.71 945.835.4 954.83 954.809.5 954.81 2.813.9 951.40 7.116.4 949.02 946.3118.9 946.97 7.719.5 945.37 0.520.9 945.35 0.422.3 945.52 18.223.9 945.39 1.124.5 945.45 19.626.1 945.4527.5 947.2630.2 948.9435.5 951.9139.1 954.10River Basin:YadkinWatershed:Hall CreekXS IDT1aDrainage Area (sq mi):29 acresDate:11/21/2016Field Crew:A. French, T. SeelingerEntrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Bank Height Ratio:9449459469479489499509519529539549559560 5 10 15 20 25 30 35 40Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, T1aBankfullTop of BankFlood Prone AreaAssessment 11/21/16 Cross-Section PlotsStation Elevation0.0 942.62 939.163.3 942.63 942.605.1 942.61 2.77.3 940.12 4.18.8 938.55 940.149.3 938.27 6.09.8 938.18 1.011.0 938.36 0.712.0 938.90 6.213.0 939.83 1.514.2 941.01 4.517.3 942.1720.4 943.2922.2 943.9225.4 943.98River Basin:YadkinWatershed:Hall CreekXS IDT1 XS1Drainage Area (sq mi):30 acresDate:11/21/2016Field Crew:A. French, T. SeelingerEntrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Bank Height Ratio:9379389399409419429439449450 5 10 15 20 25Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, T1 XS1BankfullTop of BankFlood Prone AreaAssessment 11/21/16 Cross-Section PlotsStation Elevation0.0 932.65 930.343.1 931.80 930.357.7 930.73 3.814.2 931.08 7.520.7 931.21 931.2724.4 931.47 16.626.7 930.99 0.928.0 930.49 0.528.8 929.95 14.929.4 929.60 2.230.3 929.44 1.030.6 929.4131.9 929.5132.8 929.9734.2 930.0736.1 930.4039.0 930.5640.6 930.6342.6 931.5849.0 931.6054.7 931.78River Basin:YadkinWatershed:Hall CreekXS IDT1 XS2 (REFERENCE)Drainage Area (sq mi):43 acresDate:11/21/2016Field Crew:A. French, T. SeelingerEntrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Bank Height Ratio:9299309319329330 1020304050Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, T1 XS2 (REFERENCE)BankfullTop of BankFlood Prone AreaAssessment 11/21/16 Cross-Section PlotsStation Elevation0.0 928.53 925.207.2 928.52 928.1114.6 928.12 3.016.9 927.21 5.017.4 925.90 925.9518.1 924.91 6.119.4 924.48 0.819.7 924.50 0.622.0 924.45 8.422.6 924.82 1.224.5 927.08 4.927.4 928.1533.7 928.7441.6 929.50River Basin:YadkinWatershed:Hall CreekXS IDT1 XS3Drainage Area (sq mi):40 acresDate:11/21/2016Field Crew:A. French, T. SeelingerEntrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Bank Height Ratio:9249259269279289299300 5 10 15 20 25 30 35 40 45Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, T1 XS3BankfullTop of BankFlood Prone AreaAssessment 11/21/16 Cross-Section PlotsStation Elevation0.0 929.36 926.031.9 929.15 927.804.8 928.77 1.59.9 928.66 3.114.9 928.56 926.7916.7 928.58 4.018.2 928.73 0.819.5 928.60 0.520.4 928.22 6.321.4 927.71 1.322.2 925.53 3.323.0 925.2723.6 925.5124.4 925.5525.2 926.0826.0 927.0727.4 927.4528.7 927.8531.0 928.3733.7 928.5438.9 928.3644.7 928.3651.3 928.6854.8 928.92River Basin:YadkinWatershed:Hall CreekXS IDT2Drainage Area (sq mi):16 acresDate:12/1/2016Field Crew:A. French, T. SeelingerEntrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Bank Height Ratio:9259269279289299300 5 10 15 20 25 30 35 40 45Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, T2BankfullTop of BankFlood Prone AreaAssessment 12/1/16 Cross-Section PlotsStation Elevation0.0 929.52 924.174.3 929.32 926.097.6 928.83 1.19.7 928.10 3.511.4 927.18 924.6012.6 926.00 4.213.8 924.87 0.414.4 923.84 0.315.7 923.80 11.316.7 923.92 1.217.2 923.75 5.518.5 924.9119.9 926.0921.5 926.5223.4 926.9827.2 927.2731.1 927.48River Basin:YadkinWatershed:Hall CreekXS IDT3Drainage Area (sq mi):7 acresDate:11/21/2016Field Crew:A. French, T. SeelingerEntrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Bank Height Ratio:9239249259269279289299300 5 10 15 20 25 30Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, T3BankfullTop of BankFlood Prone AreaAssessment 11/21/16 Cross-Section PlotsStation Elevation0.0 914.94 910.752.6 914.71 913.135.7 913.91 0.78.2 913.14 2.59.0 911.54 911.159.3 910.97 4.711.2 910.82 0.412.2 910.35 0.313.7 910.53 9.414.0 911.27 1.914.5 913.20 6.916.9 913.5521.9 914.17River Basin:YadkinWatershed:Hall CreekXS IDT4Drainage Area (sq mi):4 acresDate:11/21/2016Field Crew:A. French, T. SeelingerEntrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Bank Height Ratio:9109119129139149159160 5 10 15 20 25Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, T4BankfullTop of BankFlood Prone AreaAssessment 11/21/16 Cross-Section PlotsStation Elevation0.0 878.34 875.313.7 878.43 877.867.6 877.98 2.69.2 875.95 4.410.3 874.83 876.0511.2 874.70 5.412.5 874.57 0.713.4 874.62 0.614.0 874.71 7.514.5 876.04 1.215.9 877.19 4.417.5 877.8619.3 878.1623.5 878.0027.5 877.82River Basin:YadkinWatershed:Hall CreekXS IDT6Drainage Area (sq mi):29 acresDate:12/1/2016Field Crew:A. French, T. SeelingerEntrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Bank Height Ratio:8748758768778788790 5 10 15 20 25 30Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, T6BankfullTop of BankFlood Prone AreaAssessment 12/1/16 Cross-Section PlotsStation Elevation0.0 866.58 864.904.4 866.78 865.728.8 867.16 2.411.8 867.20 3.212.8 867.03 866.0013.3 864.61 4.613.8 864.22 1.114.2 864.00 0.814.6 863.80 4.115.0 863.85 1.415.6 864.15 1.716.3 864.2916.6 865.7317.7 866.0319.9 866.3521.9 866.0423.0 866.1824.9 866.8627.1 867.84River Basin:YadkinWatershed:Hall CreekXS IDT7Drainage Area (sq mi):40 acresDate:12/1/2016Field Crew:A. French, T. SeelingerEntrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Bank Height Ratio:8638648658668678688690 5 10 15 20 25 30Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, T7BankfullTop of BankFlood Prone AreaAssessment 12/1/16 Cross-Section PlotsStation Elevation0.0 845.20 842.954.6 844.97 843.897.3 844.63 1.09.6 844.33 3.110.0 843.85 843.5010.3 842.92 4.111.0 842.85 0.511.4 842.56 0.311.7 842.43 10.212.1 842.40 1.312.7 842.49 2.713.6 843.0614.7 843.9016.2 844.2617.7 844.5419.0 844.5523.0 844.4126.5 844.19River Basin:YadkinWatershed:Hall CreekXS IDT8aDrainage Area (sq mi):7 acresDate:12/1/2016Field Crew:A. French, T. SeelingerEntrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Bank Height Ratio:8428438448458460 5 10 15 20 25 30Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, T8aBankfullTop of BankFlood Prone AreaAssessment 12/1/16 Cross-Section PlotsStation Elevation0.0 876.09 874.101.7 875.34 874.102.8 874.58 2.53.5 874.32 5.74.4 874.16 874.694.9 873.58 11.56.1 873.61 0.67.3 873.51 0.48.5 873.60 13.49.3 873.81 2.010.0 874.09 1.011.0 874.1912.6 874.1813.9 874.5415.7 875.4218.1 876.2121.8 876.75River Basin:YadkinWatershed:Hall CreekXS IDT8 XS1 (REFERENCE)Drainage Area (sq mi):15 acresDate:12/1/2016Field Crew:A. French, T. SeelingerEntrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Bank Height Ratio:8738748758768770 5 10 15 20 25Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, T8 XS1 (REFERENCE)BankfullTop of BankFlood Prone AreaAssessment 12/1/16 Cross-Section PlotsStation Elevation0.0 842.58 838.744.8 842.60 840.0810.0 842.67 2.414.5 842.34 3.617.0 841.79 839.6218.1 841.14 4.118.5 840.81 0.919.3 838.26 0.720.1 838.17 5.520.4 838.06 1.121.2 838.01 2.521.7 837.9622.6 837.8623.1 840.0825.8 841.0029.4 841.8836.7 842.8740.5 842.91River Basin:YadkinWatershed:Hall CreekXS IDT8 XS2Drainage Area (sq mi):21 acresDate:12/1/2016Field Crew:A. French, T. SeelingerEntrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Bank Height Ratio:8378388398408418428438440 5 10 15 20 25 30 35 40Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, T8 XS2BankfullTop of BankFlood Prone AreaAssessment 12/1/16 Cross-Section PlotsStation Elevation*0.0 100.07 99.202.0 100.20 99.854.0 100.31 2.04.9 100.16 2.95.4 99.86 100.096.0 99.35 5.56.3 98.48 0.97.1 98.31 0.77.4 98.34 4.38.0 98.35 1.98.3 98.48 1.78.6 98.739.6 99.8510.6 100.1612.0 100.4114.3 100.3016.3 100.10*assumed elevationRiver Basin:YadkinWatershed:Hall CreekXS IDT9Drainage Area (sq mi):29 acresDate:12/1/2016Field Crew:A. French, T. SeelingerEntrenchment Ratio:SUMMARY DATABankfull Elevation:Top of Bank Elevation:Bankfull Cross-Sectional Area:Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Mean Depth at Bankfull:W / D Ratio:Bank Height Ratio:98991001010246810121416Elevation (feet)Station (feet)Mill Dam Creek, Yadkin River Basin, Hall Creek, T9BankfullTop of BankFlood Prone AreaAssessment 12/1/16 Particle Millimeter CountSilt/Clay < 0.062 S/C 4Very Fine .062 - .125S3Fine .125 - .25AMedium .25 - .50N4Coarse .50 - 1D2Very Coarse 1 - 2S7Very Fine 2 - 4 6Fine 4 - 5.7 G 1Fine 5.7 - 8 R 1Medium 8 - 11.3 A 2Medium 11.3 - 16 V 3Coarse 16 - 22.6 E 7Coarse 22.6 - 32 L 6Very Coarse 32 - 45 S 10Very Coarse 45 - 64 11Small 64 - 90 C 14Small 90 - 128 O 14Large 128 - 180 B 4Large 180 - 256 L 1Small 256 - 362 BSmall 362 - 512 LD161.3mean 11.2 silt/clay 4%Medium 512 - 1024 DD3518dispersion 15.5 sand 16%Lrg- Very Lrg 1024 - 2048 RD5037skewness -0.38 gravel 47%Bedrock >2048 BDRKD6560cobble 33%Total100D8497boulder 0%D95130bedrock 0%hardpan0%wood/det0%artificial0%UTHC XS2-REFSize (mm) Size Distribution TypeNote:0%20%40%60%80%100%0.01 0.1 1 10 100 1000 10000% Finer Than (Cumulative)Particle Size - MillimetersParticle Size DistributionMill Dam CreekUTHC XS2-REF Particle Millimeter CountSilt/Clay < 0.062 S/CVery Fine .062 - .125SFine .125 - .25A1Medium .25 - .50N6Coarse .50 - 1D6Very Coarse 1 - 2S8Very Fine 2 - 4 6Fine 4 - 5.7 G 5Fine 5.7 - 8 R 8Medium 8 - 11.3 A 8Medium 11.3 - 16 V 8Coarse 16 - 22.6 E 6Coarse 22.6 - 32 L 4Very Coarse 32 - 45 S 2Very Coarse 45 - 64 9Small 64 - 90 C 7Small 90 - 128 O 15Large 128 - 180 B 2Large 180 - 256 LSmall 256 - 362 BSmall 362 - 512 LD161.3mean 10.9 silt/clay 0%Medium 512 - 1024 DD356.8dispersion 8.4 sand 21%Lrg- Very Lrg 1024 - 2048 RD5012skewness -0.03 gravel 55%Bedrock >2048 BDRKD6531cobble 24%Total101D8492boulder 0%D95120bedrock 0%hardpan0%wood/det0%artificial0%UTHC XS3TypeSize DistributionNote:Size (mm)0%20%40%60%80%100%0.01 0.1 1 10 100 1000 10000% Finer Than (Cumulative)Particle Size - MillimetersParticle Size DistributionMill Dam CreekUTHC XS3 Particle Millimeter CountSilt/Clay < 0.062 S/C 14Very Fine .062 - .125 S 2Fine .125 - .25 A 4Medium .25 - .50N2Coarse .50 - 1D4Very Coarse 1 - 2 S 1Very Fine 2 - 4 3Fine 4 - 5.7 G 4Fine 5.7 - 8 RMedium 8 - 11.3 A 2Medium 11.3 - 16 V 1Coarse 16 - 22.6 E 5Coarse 22.6 - 32 L 5Very Coarse 32 - 45 S 3Very Coarse 45 - 64 8Small 64 - 90 C 5Small 90 - 128 O 1Large 128 - 180 BLarge 180 - 256 LSmall 256 - 362 BSmall 362 - 512 L 1D160.062mean 0.1 silt/clay 14%Medium 512 - 1024 DD350.57dispersion 2.2 sand 13%Lrg- Very Lrg 1024 - 2048 RD505.2skewness 0.18 gravel 31%Bedrock >2048 BDRK 34D6522cobble 6%Total99D8455boulder 1%D9583bedrock 34%hardpan0%wood/det0%artificial0%UTHC XS4TypeSize DistributionNote:Size (mm)0%20%40%60%80%100%0.01 0.1 1 10 100 1000 10000% Finer Than (Cumulative)Particle Size - MillimetersParticle Size DistributionMill Dam CreekUTHC XS4 Particle Millimeter CountSilt/Clay < 0.062 S/C 1Very Fine .062 - .125S3Fine .125 - .25AMedium .25 - .50N7Coarse .50 - 1D3Very Coarse 1 - 2S5Very Fine 2 - 4 11Fine 4 - 5.7 G 1Fine 5.7 - 8 RMedium 8 - 11.3 A 7Medium 11.3 - 16 V 1Coarse 16 - 22.6 E 9Coarse 22.6 - 32 L 1Very Coarse 32 - 45 S 6Very Coarse 45 - 64 11Small 64 - 90 C 8Small 90 - 128 O 3Large 128 - 180 B 2Large 180 - 256 LSmall 256 - 362 BSmall 362 - 512 LD160.73mean 6.9 silt/clay 1%Medium 512 - 1024 DD353.4dispersion 13.0 sand 17%Lrg- Very Lrg 1024 - 2048 RD5016skewness -0.26 gravel 45%Bedrock >2048 BDRK 26D6537cobble 12%Total105D8465boulder 0%D95100bedrock 25%hardpan0%wood/det0%artificial0%UTHC XS5TypeSize DistributionNote:Size (mm)0%20%40%60%80%100%0.01 0.1 1 10 100 1000 10000% Finer Than (Cumulative)Particle Size - MillimetersParticle Size DistributionMill Dam CreekUTHC XS5 Particle Millimeter CountSilt/Clay < 0.062 S/CVery Fine .062 - .125SFine .125 - .25A3Medium .25 - .50N4Coarse .50 - 1D5Very Coarse 1 - 2S5Very Fine 2 - 4 3Fine 4 - 5.7 G 4Fine 5.7 - 8 R 8Medium 8 - 11.3 A 4Medium 11.3 - 16 V 5Coarse 16 - 22.6 E 10Coarse 22.6 - 32 L 15Very Coarse 32 - 45 S 13Very Coarse 45 - 64 15Small 64 - 90 C 14Small 90 - 128 O 4Large 128 - 180 B 1Large 180 - 256 L 1Small 256 - 362 BSmall 362 - 512 LD162.7mean 13.4 silt/clay 0%Medium 512 - 1024 DD3515dispersion 6.1 sand 15%Lrg- Very Lrg 1024 - 2048 RD5026skewness -0.24 gravel 68%Bedrock >2048 BDRKD6540cobble 18%Total114D8467boulder 0%D9592bedrock 0%hardpan0%wood/det0%artificial0%UTHC XS6TypeSize DistributionNote:Size (mm)0%20%40%60%80%100%0.01 0.1 1 10 100 1000 10000% Finer Than (Cumulative)Particle Size - MillimetersParticle Size DistributionMill Dam CreekUTHC XS6 Particle Millimeter CountSilt/Clay < 0.062 S/C 6Very Fine .062 - .125S2Fine .125 - .25A4Medium .25 - .50N1Coarse .50 - 1DVery Coarse 1 - 2S10Very Fine 2 - 4 13Fine 4 - 5.7 GFine 5.7 - 8 R 1Medium 8 - 11.3 A 3Medium 11.3 - 16 V 3Coarse 16 - 22.6 E 10Coarse 22.6 - 32 L 6Very Coarse 32 - 45 S 11Very Coarse 45 - 64 8Small 64 - 90 C 10Small 90 - 128 O 8Large 128 - 180 B 2Large 180 - 256 L 5Small 256 - 362 BSmall 362 - 512 LD161.3mean 10.6 silt/clay 5%Medium 512 - 1024 DD356.1dispersion 10.1 sand 15%Lrg- Very Lrg 1024 - 2048 RD5021skewness -0.22 gravel 47%Bedrock >2048 BDRK 14D6541cobble 21%Total117D8486boulder 0%D95180bedrock 12%hardpan0%wood/det0%artificial0%UTHC XS7TypeSize DistributionNote:Size (mm)0%20%40%60%80%100%0.01 0.1 1 10 100 1000 10000% Finer Than (Cumulative)Particle Size - MillimetersParticle Size DistributionMill Dam CreekUTHC XS7 Particle Millimeter CountSilt/Clay < 0.062 S/C 32Very Fine .062 - .125S17Fine .125 - .25A23Medium .25 - .50N8Coarse .50 - 1D1Very Coarse 1 - 2S3Very Fine 2 - 4 3Fine 4 - 5.7 GFine 5.7 - 8 RMedium 8 - 11.3 A 1Medium 11.3 - 16 VCoarse 16 - 22.6 E 2Coarse 22.6 - 32 LVery Coarse 32 - 45 S 4Very Coarse 45 - 64 2Small 64 - 90 C 3Small 90 - 128 O 1Large 128 - 180 B 2Large 180 - 256 LSmall 256 - 362 BSmall 362 - 512 LD160.062mean 0.4 silt/clay 31%Medium 512 - 1024 DD350.072dispersion 12.2 sand 51%Lrg- Very Lrg 1024 - 2048 RD500skewness 0.40 gravel 12%Bedrock >2048 BDRKD650.21cobble 6%Total102D842.9boulder 0%D9571bedrock 0%hardpan0%wood/det0%artificial0%T1aTypeSize DistributionNote:Size (mm)0%20%40%60%80%100%0.01 0.1 1 10 100 1000 10000% Finer Than (Cumulative)Particle Size - MillimetersParticle Size DistributionMill Dam CreekT1a Particle Millimeter CountSilt/Clay < 0.062 S/C 9Very Fine .062 - .125S4Fine .125 - .25A16Medium .25 - .50N5Coarse .50 - 1D4Very Coarse 1 - 2S4Very Fine 2 - 4 7Fine 4 - 5.7 G 1Fine 5.7 - 8 R 1Medium 8 - 11.3 A 3Medium 11.3 - 16 V 3Coarse 16 - 22.6 E 4Coarse 22.6 - 32 L 9Very Coarse 32 - 45 S 13Very Coarse 45 - 64 3Small 64 - 90 C 5Small 90 - 128 OLarge 128 - 180 BLarge 180 - 256 LSmall 256 - 362 BSmall 362 - 512 LD160.13mean 2.2 silt/clay 10%Medium 512 - 1024 DD350.37dispersion 17.6 sand 36%Lrg- Very Lrg 1024 - 2048 RD503skewness -0.06 gravel 48%Bedrock >2048 BDRKD6519cobble 5%Total91D8438boulder 0%D9566bedrock 0%hardpan0%wood/det0%artificial0%T1 XS1Size (mm) Size Distribution TypeNote:0%20%40%60%80%100%0.01 0.1 1 10 100 1000 10000% Finer Than (Cumulative)Particle Size - MillimetersParticle Size DistributionMill Dam CreekT1 XS1 Particle Millimeter CountSilt/Clay < 0.062 S/C 61Very Fine .062 - .125SFine .125 - .25A1Medium .25 - .50N3Coarse .50 - 1D1Very Coarse 1 - 2S2Very Fine 2 - 4 2Fine 4 - 5.7 G 4Fine 5.7 - 8 R 5Medium 8 - 11.3 A 2Medium 11.3 - 16 V 6Coarse 16 - 22.6 E 10Coarse 22.6 - 32 L 8Very Coarse 32 - 45 S 4Very Coarse 45 - 64 5Small 64 - 90 C 3Small 90 - 128 OLarge 128 - 180 BLarge 180 - 256 LSmall 256 - 362 BSmall 362 - 512 L 1D160.062mean 1.2 silt/clay 51%Medium 512 - 1024 D 1D350.062dispersion 202.1 sand 6%Lrg- Very Lrg 1024 - 2048 RD500skewness 0.81 gravel 39%Bedrock >2048 BDRKD657.3cobble 3%Total119D8425boulder 2%D9560bedrock 0%hardpan0%wood/det0%artificial0%T1 XS3Size (mm) Size Distribution TypeNote:0%20%40%60%80%100%0.01 0.1 1 10 100 1000 10000% Finer Than (Cumulative)Particle Size - MillimetersParticle Size DistributionMill Dam CreekT1 XS3 Particle Millimeter CountSilt/Clay < 0.062 S/C 11Very Fine .062 - .125S5Fine .125 - .25AMedium .25 - .50N8Coarse .50 - 1D1Very Coarse 1 - 2SVery Fine 2 - 4 4Fine 4 - 5.7 GFine 5.7 - 8 R 1Medium 8 - 11.3 A 3Medium 11.3 - 16 V 8Coarse 16 - 22.6 E 13Coarse 22.6 - 32 L 8Very Coarse 32 - 45 S 16Very Coarse 45 - 64 12Small 64 - 90 C 10Small 90 - 128 O 3Large 128 - 180 BLarge 180 - 256 LSmall 256 - 362 BSmall 362 - 512 LD160.26mean 3.9 silt/clay 11%Medium 512 - 1024 DD3513dispersion 41.8 sand 14%Lrg- Very Lrg 1024 - 2048 RD5021skewness -0.48 gravel 63%Bedrock >2048 BDRKD6536cobble 13%Total103D8458boulder 0%D9584bedrock 0%hardpan0%wood/det0%artificial0%T2Size (mm) Size Distribution TypeNote:0%20%40%60%80%100%0.01 0.1 1 10 100 1000 10000% Finer Than (Cumulative)Particle Size - MillimetersParticle Size DistributionMill Dam CreekT2 Particle Millimeter CountSilt/Clay < 0.062 S/C 30Very Fine .062 - .125SFine .125 - .25AMedium .25 - .50N3Coarse .50 - 1D2Very Coarse 1 - 2SVery Fine 2 - 4 5Fine 4 - 5.7 G 2Fine 5.7 - 8 R 2Medium 8 - 11.3 A 3Medium 11.3 - 16 V 4Coarse 16 - 22.6 E 2Coarse 22.6 - 32 L 5Very Coarse 32 - 45 S 8Very Coarse 45 - 64 10Small 64 - 90 C 8Small 90 - 128 O 8Large 128 - 180 B 7Large 180 - 256 L 6Small 256 - 362 B 3Small 362 - 512 L 1D160.062mean 2.8 silt/clay 28%Medium 512 - 1024 DD353.1dispersion 204.2 sand 5%Lrg- Very Lrg 1024 - 2048 RD5025skewness -0.52 gravel 38%Bedrock >2048 BDRKD6553cobble 27%Total109D84130boulder 4%D95240bedrock 0%hardpan0%wood/det0%artificial0%T3Size (mm) Size Distribution TypeNote:0%20%40%60%80%100%0.01 0.1 1 10 100 1000 10000% Finer Than (Cumulative)Particle Size - MillimetersParticle Size DistributionMill Dam CreekT3 Particle Millimeter CountSilt/Clay < 0.062 S/C 13Very Fine .062 - .125S5Fine .125 - .25A47Medium .25 - .50N6Coarse .50 - 1D5Very Coarse 1 - 2S5Very Fine 2 - 4 7Fine 4 - 5.7 G 1Fine 5.7 - 8 R 1Medium 8 - 11.3 A 1Medium 11.3 - 16 VCoarse 16 - 22.6 E 1Coarse 22.6 - 32 L 1Very Coarse 32 - 45 SVery Coarse 45 - 64 2Small 64 - 90 C 2Small 90 - 128 O 3Large 128 - 180 B 3Large 180 - 256 LSmall 256 - 362 B 1Small 362 - 512 LD160.11mean 0.7 silt/clay 12%Medium 512 - 1024 D 1D350.16dispersion 11.2 sand 65%Lrg- Very Lrg 1024 - 2048 RD500skewness 0.41 gravel 13%Bedrock >2048 BDRKD650.36cobble 8%Total105D844.3boulder 2%D95120bedrock 0%hardpan0%wood/det0%artificial0%T4Size (mm) Size Distribution TypeNote:0%20%40%60%80%100%0.01 0.1 1 10 100 1000 10000% Finer Than (Cumulative)Particle Size - MillimetersParticle Size DistributionMill Dam CreekT4 Particle Millimeter CountSilt/Clay < 0.062 S/C 7Very Fine .062 - .125SFine .125 - .25A15Medium .25 - .50NCoarse .50 - 1D4Very Coarse 1 - 2S14Very Fine 2 - 4 10Fine 4 - 5.7 G 10Fine 5.7 - 8 R 13Medium 8 - 11.3 A 10Medium 11.3 - 16 V 5Coarse 16 - 22.6 E 5Coarse 22.6 - 32 L 5Very Coarse 32 - 45 S 2Very Coarse 45 - 64 1Small 64 - 90 CSmall 90 - 128 OLarge 128 - 180 BLarge 180 - 256 LSmall 256 - 362 BSmall 362 - 512 LD160.19mean 1.6 silt/clay 7%Medium 512 - 1024 DD351.6dispersion 12.4 sand 33%Lrg- Very Lrg 1024 - 2048 RD504skewness -0.31 gravel 60%Bedrock >2048 BDRKD656.8cobble 0%Total101D8413boulder 0%D9527bedrock 0%hardpan0%wood/det0%artificial0%T6Size (mm) Size Distribution TypeNote:0%20%40%60%80%100%0.01 0.1 1 10 100 1000 10000% Finer Than (Cumulative)Particle Size - MillimetersParticle Size DistributionMill Dam CreekT6 Particle Millimeter CountSilt/Clay < 0.062 S/C 3Very Fine .062 - .125S4Fine .125 - .25A2Medium .25 - .50N6Coarse .50 - 1DVery Coarse 1 - 2S7Very Fine 2 - 4 10Fine 4 - 5.7 G 1Fine 5.7 - 8 R 4Medium 8 - 11.3 AMedium 11.3 - 16 V 6Coarse 16 - 22.6 E 10Coarse 22.6 - 32 L 6Very Coarse 32 - 45 S 13Very Coarse 45 - 64 15Small 64 - 90 C 13Small 90 - 128 O 2Large 128 - 180 B 2Large 180 - 256 LSmall 256 - 362 B 1Small 362 - 512 LD161.2mean 8.9 silt/clay 3%Medium 512 - 1024 DD357.9dispersion 10.7 sand 18%Lrg- Very Lrg 1024 - 2048 RD5022skewness -0.30 gravel 62%Bedrock >2048 BDRKD6541cobble 16%Total105D8466boulder 1%D9589bedrock 0%hardpan0%wood/det0%artificial0%T7Size (mm) Size Distribution TypeNote:0%20%40%60%80%100%0.01 0.1 1 10 100 1000 10000% Finer Than (Cumulative)Particle Size - MillimetersParticle Size DistributionMill Dam CreekT7 Particle Millimeter CountSilt/Clay < 0.062 S/C 100Very Fine .062 - .125SFine .125 - .25AMedium .25 - .50NCoarse .50 - 1DVery Coarse 1 - 2SVery Fine 2 - 4Fine 4 - 5.7 GFine 5.7 - 8 RMedium 8 - 11.3 AMedium 11.3 - 16 VCoarse 16 - 22.6 ECoarse 22.6 - 32 LVery Coarse 32 - 45 SVery Coarse 45 - 64Small 64 - 90 CSmall 90 - 128 OLarge 128 - 180 BLarge 180 - 256 LSmall 256 - 362 BSmall 362 - 512 LD160.062mean 0.1 silt/clay 100%Medium 512 - 1024 DD350.062dispersion 1.0 sand 0%Lrg- Very Lrg 1024 - 2048 RD500.062skewness --- gravel 0%Bedrock >2048 BDRKD650.062cobble 0%Total100D840.062boulder 0%D950.062bedrock 0%hardpan0%wood/det0%artificial0%T8aSize (mm) Size Distribution TypeNote:0%20%40%60%80%100%0.01 0.1 1 10 100 1000 10000% Finer Than (Cumulative)Particle Size - MillimetersParticle Size DistributionMill Dam CreekT8a Particle Millimeter CountSilt/Clay < 0.062 S/C 11Very Fine .062 - .125S5Fine .125 - .25A4Medium .25 - .50NCoarse .50 - 1D4Very Coarse 1 - 2S10Very Fine 2 - 4 9Fine 4 - 5.7 G 5Fine 5.7 - 8 R 1Medium 8 - 11.3 A 5Medium 11.3 - 16 V 1Coarse 16 - 22.6 E 2Coarse 22.6 - 32 L 4Very Coarse 32 - 45 S 8Very Coarse 45 - 64 8Small 64 - 90 C 10Small 90 - 128 O 8Large 128 - 180 B 5Large 180 - 256 LSmall 256 - 362 BSmall 362 - 512 LD160.13mean 3.2 silt/clay 11%Medium 512 - 1024 DD352.2dispersion 37.5 sand 23%Lrg- Very Lrg 1024 - 2048 RD509skewness -0.25 gravel 43%Bedrock >2048 BDRKD6538cobble 23%Total100D8481boulder 0%D95140bedrock 0%hardpan0%wood/det0%artificial0%T8 XS1Size (mm) Size Distribution TypeNote:0%20%40%60%80%100%0.01 0.1 1 10 100 1000 10000% Finer Than (Cumulative)Particle Size - MillimetersParticle Size DistributionMill Dam CreekT8 XS1 Particle Millimeter CountSilt/Clay < 0.062 S/C 27Very Fine .062 - .125S8Fine .125 - .25AMedium .25 - .50N8Coarse .50 - 1D3Very Coarse 1 - 2S14Very Fine 2 - 4 10Fine 4 - 5.7 GFine 5.7 - 8 R 1Medium 8 - 11.3 A 1Medium 11.3 - 16 V 3Coarse 16 - 22.6 E 8Coarse 22.6 - 32 L 6Very Coarse 32 - 45 S 3Very Coarse 45 - 64 6Small 64 - 90 C 1Small 90 - 128 O 5Large 128 - 180 BLarge 180 - 256 LSmall 256 - 362 B 1Small 362 - 512 LD160.062mean 1.4 silt/clay 26%Medium 512 - 1024 DD350.29dispersion 22.0 sand 31%Lrg- Very Lrg 1024 - 2048 RD501skewness -0.01 gravel 36%Bedrock >2048 BDRKD653.5cobble 6%Total105D8430boulder 1%D9595bedrock 0%hardpan0%wood/det0%artificial0%T8 XS2Size (mm) Size Distribution TypeNote:0%20%40%60%80%100%0.01 0.1 1 10 100 1000 10000% Finer Than (Cumulative)Particle Size - MillimetersParticle Size DistributionMill Dam CreekT8 XS2 Particle Millimeter CountSilt/Clay < 0.062 S/C 28Very Fine .062 - .125S8Fine .125 - .25A62Medium .25 - .50NCoarse .50 - 1DVery Coarse 1 - 2SVery Fine 2 - 4 3Fine 4 - 5.7 GFine 5.7 - 8 R 2Medium 8 - 11.3 A 3Medium 11.3 - 16 VCoarse 16 - 22.6 ECoarse 22.6 - 32 LVery Coarse 32 - 45 SVery Coarse 45 - 64Small 64 - 90 CSmall 90 - 128 OLarge 128 - 180 BLarge 180 - 256 LSmall 256 - 362 BSmall 362 - 512 LD160.062mean 0.1 silt/clay 26%Medium 512 - 1024 DD350.13dispersion 2.0 sand 66%Lrg- Very Lrg 1024 - 2048 RD500skewness -0.13 gravel 8%Bedrock >2048 BDRKD650.18cobble 0%Total106D840.23boulder 0%D953.7bedrock 0%hardpan0%wood/det0%artificial0%T9Size (mm) Size Distribution TypeNote:0%20%40%60%80%100%0.01 0.1 1 10 100 1000 10000% Finer Than (Cumulative)Particle Size - MillimetersParticle Size DistributionMill Dam CreekT9 Sample Weights Sample Weights Sample Weights Sample Weights Sample Weights Sample Weights Sample Weights Sample Weights Sample Weights Sample WeightsTotal Net Total Net Total Net Total Net Total Net Total Net Total Net Total Net Total Net Total Net12.21.31.50.61.90.62.20.92.70.93.42.15.13.72.91.6 No. Dia. WT.2122mm 0.028 kg3228mm 0.028 kg42556789101112131415Net Wt. Total 1.3 0.6 0.6 0.9 0.9 2.1 3.7 1.6 0.0 0.011.6 % Grand Tot. 11.4% 4.9% 5.4% 7.3% 7.5% 17.8% 31.9% 13.9% 0.0% 0.0%Accum. % =< 11.4% 16.3% 21.7% 29.0% 36.5% 54.3% 86.1% 100.0% 100.0% 100.0%NOTESSieve Size (mm)Tare Weight (kg)Sieve Size (mm)Tare Weight (kg)Sieve Size (mm)63.0Tare Weight (kg)1.30Sieve Size (mm)31.5Tare Weight (kg)1.361.79Sieve Size (mm)16.0Tare Weight (kg)1.36Sieve Size (mm) Sieve Size (mm)8.0Tare Weight (kg)Sieve Size (mm)4.0Tare Weight (kg)1.300.912.0Tare Weight (kg)1.251.0Tare Weight (kg)0.91Sieve Size (mm)Sieve Size (mm)< 1.0Tare Weight (kg)SUBSAMPLESPoint / Side BAR-BULK MATERIALS SAMPLE DATA: Size Distribution Analysis GRAND TOTALSAMPLE WEIGHTSURFACEMATERIALSDATA(Two Largest Particles)Party: A. French, T. Seelinger, R. JonesLocation: Mill Dam CreekDate: Dec-2016Notes: Located at UTHC-XS6Bucket+ MaterialsWeight____________BucketTareWeight____________MaterialsWeight____________(Materials less than:_____________mm.)Be Sure to Add Separate MaterialWeights to GrandTotal Bar Sample Sieve AnalysisStream:Watershed:<1 1.3322 11.4% 11.4% Location:1.0 0.6 4.9% 16.3% Note:2.0 0.6 5.4% 21.7%4.0 0.9 7.3% 29.0%8.0 0.9 7.5% 36.5%16.0 2.1 17.8% 54.3%31.5 3.7 31.9% 86.1%63.0 1.6 13.9% 100.0%0.0 0.0 0.0% 100.0%2 64 256 2048 0.000010.0 0.0 0.0% 100.0%2 64 256 2048 100Total:11.6 100%Size percent less than (mm) Percent by substrate typeD16 D35 D50 D84 D95silt/clay sand gravel cobble boulder bedrock7.0 7.0 13.6 30.1 49.1 0% 22% 78% 0% --- ---Pavement Sample # 2 (0-6 inches)Mill Dam CreekUTHC-XS6Smallest Sieve Passed (mm)Weight (oz) % ItemPercent Finer Than0%10%20%30%40%50%60%70%80%90%100%0.1 1 10 100 1000 10000Percent Finer ThanParticle Size (mm)Bar Sample Sieve AnalysisCumulative PercentPercent ItemSandsGravelsCobblesBouldersBedrock Sample Weights Sample Weights Sample Weights Sample Weights Sample Weights Sample Weights Sample Weights Sample Weights Sample Weights Sample WeightsTotal Net Total Net Total Net Total Net Total Net Total Net Total Net Total Net Total Net Total Net11.60.51.30.41.70.42.41.12.60.83.11.85.03.65.34.0 No. Dia. WT.2122mm 0.028 kg3228mm 0.028 kg42556789101112131415Net Wt. Total 0.5 0.4 0.4 1.1 0.8 1.8 3.6 4.0 0.0 0.012.6 % Grand Tot. 3.8% 3.4% 3.4% 8.8% 6.3% 14.0% 28.6% 31.8% 0.0% 0.0%Accum. % =< 3.8% 7.2% 10.6% 19.4% 25.7% 39.6% 68.2% 100.0% 100.0% 100.0%NOTES1.0Tare Weight (kg)0.91Sieve Size (mm)Sieve Size (mm)< 1.0Tare Weight (kg)4.0Tare Weight (kg)1.301.082.0Tare Weight (kg)1.25 1.79Sieve Size (mm)16.0Tare Weight (kg)1.36Sieve Size (mm) Sieve Size (mm)8.0Tare Weight (kg)Sieve Size (mm) Sieve Size (mm)63.0Tare Weight (kg)1.30Sieve Size (mm)31.5Tare Weight (kg)1.36Sieve Size (mm)Tare Weight (kg)Sieve Size (mm)Tare Weight (kg)SUBSAMPLESPoint / Side BAR-BULK MATERIALS SAMPLE DATA: Size Distribution Analysis GRAND TOTALSAMPLE WEIGHTSURFACEMATERIALSDATA(Two Largest Particles)Party: A. French, T. Seelinger, R. JonesLocation: Mill Dam CreekDate: Dec-2016Notes: Located at UTHC-XS7Bucket+ MaterialsWeight____________BucketTareWeight____________MaterialsWeight____________(Materials less than:_____________mm.)Be Sure to Add Separate MaterialWeights to GrandTotal Bar Sample Sieve AnalysisStream:Watershed:<1 0.4819 3.8% 3.8% Location:1.0 0.4 3.4% 7.2% Note:2.0 0.4 3.4% 10.6%4.0 1.1 8.8% 19.4%8.0 0.8 6.3% 25.7%16.0 1.8 14.0% 39.6%31.5 3.6 28.6% 68.2%63.0 4.0 31.8% 100.0%0.0 0.0 0.0% 100.0%2 64 256 2048 0.000010.0 0.0 0.0% 100.0%2 64 256 2048 100Total:12.6 100%Size percent less than (mm) Percent by substrate typeD16 D35 D50 D84 D95silt/clay sand gravel cobble boulder bedrock3.1 12.7 20.4 44.4 56.5 0% 11% 89% 0% --- ---Pavement Sample # 3 (0-6 inches)Mill Dam CreekUTHC-XS7Smallest Sieve Passed (mm)Weight (oz) % ItemPercent Finer Than0%10%20%30%40%50%60%70%80%90%100%0.1 1 10 100 1000 10000Percent Finer ThanParticle Size (mm)Bar Sample Sieve AnalysisCumulative PercentPercent ItemSandsGravelsCobblesBouldersBedrock Morphological CriteriaReference for UTHCF4, C4, B4 F4 B4, C4, G4 F4 G4 G4 B4 G4 ** G4 G4 G4 B4 B4c C4 B4c C4 C4 C4 C4b C4b C4b C4b C4b C4b C4b C4b C4b C4b C4b0.18 0.46 0.07 0.04 0.02 0.01 0.01 0.03 0.01 0.06 0.03 0.01 0.04 0.38 ~ ~ 0.08 0.18 0.46 0.07 0.04 0.02 0.01 0.01 0.03 0.01 0.06 0.03 0.01 0.045.8 - 10.6 8.5-14.1 4.1 - 7.5 7.1 3.1 3.5 2.5 4.4 ** 3.2 3.6 3.1 2.9 9.0 -- 10.0 ~ ~ 6.5 9 12 6.5 5.5 4.5 4.5 4.5 5.5 4.5 6.5 5.5 4.5 5.50.4 - 0.8 0.8-1.6 0.5 - 0.7 0.4 0.5 0.3 0.3 0.6 ** 0.8 0.7 0.3 0.7 1.1 -- 1.2 ~ ~ 0.5 0.7 0.9 0.5 0.5 0.4 0.4 0.4 0.5 0.4 0.5 0.5 0.4 0.52.8 - 4.5 8.5-12.5 2.7 - 3.8 2.8 1.5 1.1 0.7 2.6 ** 2.4 2.4 1 2 10.4 -- 10.7~ ~ 3.4 6.1 11.4 3.4 2.5 1.7 1.7 1.7 2.5 1.7 3.4 2.5 1.7 2.57.6 - 28.2 5-17 6.2 - 14.9 18.2 6.3 11.3 9.4 7.5 ** 4.1 5.5 5.5 4.3 8.0 -- 10.0 10 -- 15 12 -- 18 12.4 13.4 12.7 12.4 12.1 12 12 12 12.1 12 12.4 12.1 12 12.10.4 - 1.2 1.1-2.0 0.8 - 1.0 0.5 0.8 0.4 0.4 0.7 ** 1.1 0.9 0.9 0.9 1.3 -- 1.5 ~ ~ 0.8 1 1.5 0.8 0.7 0.6 0.6 0.6 0.7 0.6 0.8 0.7 0.6 0.79.0 - 27.3 17.1 6.0 - 32.8 7.7 4 4.2 4.7 5.4 ** 4.6 4.1 4.1 5.5 13 -- 21 ~ ~ 5050 68 35 35 22 18 16 24 24 28 25 20 221.2 - 2.6 1.2 1.5 - 4.4 1.1 1.3 1.2 1.9 1.2 ** 1.4 1.1 1.1 1.9 1.3 -- 2.3 >2.5 >2.2 7.7 5.6 5.7 5.4 6.4 4.9 4 3.6 4.4 5.3 4.3 4.5 4.4 41.2 1.2 1.1 1.1 1.1 1.1 1.0 1.0 ** 1.1 1.1 1.1 1.2 1.2 -- 1.4 1.1 -- 1.3 1.2 1.1 1.1 1.1 1.1 1.0 1.1 1.1 1.1 1.1 1.1 1.1Pool Mean Depth (ft) * * * ***** ** ** * *1.2 -- 1.4 ~ ~ 0.9 1.2 1.6 0.9 0.8 0.7 0.7 0.7 0.8 0.7 0.9 0.8 0.7 0.8Riffle Mean Depth (ft) (Dbkf) 0.4 - 0.8 0.8-1.6 0.5 - 0.7 0.4 0.5 0.30.3 0.6 ** 0.8 0.7 0.3 0.7 1.1 -- 1.2 ~ ~ 0.5 0.7 0.9 0.5 0.5 0.4 0.4 0.4 0.5 0.4 0.5 0.5 0.4 0.5Pool Width (ft) * * * ***** ** ** * *8.4 -- 11.6 ~ ~ 9.1 12.6 16.8 9.1 7.7 6.3 6.3 6.3 7.7 6.3 9.1 7.7 6.3 7.7Riffle Width (ft) 5.8 - 10.6 8.5-14.1 4.1 - 7.5 7.1 3.1 3.5 2.5 4.4 ** 3.2 3.6 3.1 2.9 90. -- 9.9 ~ ~ 6.5 9 12 6.5 5.5 4.5 4.5 4.5 5.5 4.5 6.5 5.5 4.5 5.5Pool XS Area (sf) * * * ***** ** ** * *11.6 -- 13.4 ~ ~ 8.6 14.9 27.7 8.6 6.4 4.5 4.5 4.5 6.4 4.5 8.6 6.4 4.5 6.4Riffle XS Area (sf) 2.8 - 4.5 8.5-12.5 2.7 - 3.8 2.8 1.5 1.1 0.7 2.6 ** 2.4 2.4 1 2 10.4 -- 10.7 ~ ~ 3.4 6.1 11.4 3.4 2.5 1.7 1.7 1.7 2.5 1.7 3.4 2.5 1.7 2.5Pool Width / Riffle Width * * * ***** ** ** * *0.8 -- 1.3 1.2 -- 1.7 1.1 -- 1.5 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.41.4 1.4 1.4Pool Max Depth / Dbkf* * * * **** ** ** * *2.1 -- 2.4 1.5 -- 3.5 2.0 -- 3.5 3.2 2.9 3.1 3.2 2.8 3 3 3 2.8 3 3.2 2.8 3 2.8Bank Height Ratio 1.0 - 10.4 2.7-3.2 1.0 - 4.5 19.6 3.3 5.5 6.9 4.4 ** 1.7 2.5 2.7 1.7 1.0 1.0 -- 1.1 1.0 -- 1.1 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.01.0 1.0 1.0 1.0Mean Bankfull Velocity (V) (fps) 3.8 - 5.1 3.7-5.1 3.6 - 4.9 3.4 4.74.4 5.2 3.9 ** 5.3 5.5 3.8 4.9 4.1 -- 4.5 3.5 -- 5.0 4.0 -- 6.0 4.3 4.6 4.6 4.4 4.2 4.5 5.3 7.3 4.5 6.6 4.2 5.2 4.6 5Bankfull Discharge (Q) (cfs) 11 -- 16 51 13 -- 14 9.5 6.3 4.8 3.4 10 ** 13 13.4 3.7 9.7 42 -- 46 ~ ~ 14.6 28 51.9 14.8 10.5 7.7 9.1 *** , ga 11.2 11.4 14.3 12.9**** 7.9*** 12.4**Radius of Curvature (Rc) (ft) * * * ***** ** ** * *13 -- 42 ~ ~ 18 - 27 18 - 27 24 - 36 15 - 22 15 - 22 Na Na Na Na Na 15 - 22 NaNaNaBelt Width (Wblt) (ft) * * * ***** ** ** * * 45 ~ ~26 - 49 36 - 61 39 - 57 23 - 41 20 - 28 Na Na Na Na Na 20 - 24 Na Na 24Meander Length (Lm) (ft) * * * ***** ** ** * *93 -- 136 ~ ~ 84 - 125 54 - 118 111 - 173 60 - 83 72 - 84 Na Na Na Na Na 85 - 88 Na Na NaRadius of Curvature / Bankfull Width * * * ***** ** ** * *1.3 -- 4.4 2 -- 3 Na 2.8 - 4.1 2.0 - 3.0 2.0 - 3.0 2.3 - 3.4 2.3 - 3.4Na Na Na Na Na 2.3 - 3.4 Na Na NaMeander Width Ratio (Wblt / Wbkf) * * * ***** ** ** * *4.5 -- 5.0 3.5 -- 8 Na 4.0 - 7.5 4.0 - 6.8 3.3 - 4.8 3.5 - 6.3 3.6 - 5.1 Na Na Na Na Na 3.1 - 3.7 Na Na NaMeander Length / Bankfull Width * * * ***** ** ** * *9.0 -- 15.0 7 -- 14 Na 12.9 - 19.2 6.0 - 13.1 9.3 - 14.4 8.2 - 11.4 11.1 - 12.9 Na Na Na Na Na 13.1 - 13.5 Na Na NaValley slope 0.028 0.017 0.028 0.039 0.049 0.06 0.12 0.042 ** 0.03 0.045 0.051 0.013 0.016 0.005 - 0.015 0.005 - 0.015 0.028 0.025 0.017 0.029 0.032 0.046 0.065 0.118 0.038 0.098 0.026 0.05 0.047 0.045Average water surface slope 0.021 0.014 0.026 0.022 0.038 0.059 0.089 0.041 ** 0.033 0.044 0.052 0.039 0.013 ~ ~ 0.025 0.021 0.015 0.026 0.03 0.042 0.059 0.113 0.034 0.091 0.024 0.045 0.044 0.042Riffle slope 0.024 - 0.033 0.015 0.019 - 0.028 0.025 0.04 0.058 0.1 0.02 ** 0.032 0.041 0.044 0.031 0.013 - 0.028 ~ ~ 0.018 - 0.0460.022 - 0.0380.007 - 0.032 0.015 - 0.060 0.020 - 0.062 0.024 - 0.063 0.051 - 0.0740.102 - 0.1030.020 - 0.053 0.087 - 0.099 0.017 - 0.043 0.043 - 0.050 0.019 - 0.052 0.037Pool slope * * * ***** ** ** * *0 -- 0.001 ~ ~ 0 0 000000000000Pool to pool spacing * * * ***** ** ** * *30 -- 59 ~ ~ 48 - 70 51 - 66 52 - 101 25 - 63 32 - 58 21 - 34 20 - 30 24 - 27 32 - 47 22 - 23 36 - 57 32 - 45 28 -- 38 34 - 36Arc length * * * ***** ** ** * *3 -- 25 ~ ~ 16 - 32 14 - 35 19 - 51 10-21 12-29 Na Na Na Na Na 11-18 Na Na NaRiffle Slope / Avg. Water Surface Slope 1.1 - 1.6 1.1 0.7 - 1.1 1.11.1 1.0 1.1 0.5 ** 1.0 0.9 0.8 0.8 1.0 -- 2.2 1.2 -- 1.5 1.1 -- 1.8 0.7 - 1.8 1.0 - 1.7 0.5 - 2.1 0.6 - 2.3 0.7 - 2.1 0.6 - 1.5 0.9 - 1.3 0.90 0.6 - 1.6 1.0 - 1.1 0.7 - 1.8 1.0 - 1.1 0.4 - 1.2 0.90Pool Slope / Avg. Water Surface Slope * * * ***** ** ** * * 00 -- 0.2 0 -- 0.4 0 0 000000000000Pool to Pool Spacing / Bankfull Width * * * ***** ** ** * *3.3 -- 6.0 3.5 -- 7.0 1.5 -- 6.0 7.4 - 10.8 5.6 - 7.3 4.3 - 8.4 3.9 - 9.7 5.8 - 10.5 4.7 - 7.6 4.4 - 6.7 5.3 - 6.0 5.8 - 8.5 4.9 - 5.1 5.5 - 10.4 5.8 - 8.2 6.2 - 8.4 6.2 - 6.5* : no data shown for pools in existing stream do to channelization / lack of bed diversity** : no cross-section data collected (ponded area)***: cross-section sized larger for constructability****: cross-section sized larger than regional curve to match discharge on stable upstream cross-sectionNa : not applicable for steeper step pool stream types1.2Restored ReachT9T8 T9T8AT4 T6 T6A T7 T8 T8AT3 T4 T6 T6A T7Stable Design Ratios 'Bc'streamUTHC1 (bottom)Bankfull Mean Depth (Dbkf) (ft)Stream Type (Rosgen)Profile Pattern DimensionEntrenchment Ratio (ER)Sinuosity (stream length/valley length) (K)Width of Flood Prone Area (Wfpa) (ft)Maximum Depth (dmbkf) (ft)VariablesUTHC3 T1 T1ABankfull Cross-Sectional Area (Abkf) (ft2)Width / Depth Ratio (Wbkf / Dbkf)Bankfull Width (Wbkf) (ft)UTHC1Existing ChannelDrainage Area (mi2)T3T2 UTFRT2T1AUTHC3 T1UTHC1 (top)Stable Design Ratios 'C' stream Project Reach Location Source: Bottom (2013) USGS1:24000 Quadrangle Map UT TO FISHER RIVERREFERENCE SITE LOCATION SURRY COUNTY, NC ±0 1,000500Feet 7 Directions to Reference Re ach: -From I-77, take Exit 93.-Travel West from I-77.-Bear right on Fisher Valley Rd (SR 13 38)-UT to Fisher River crosses roa dapproximately 3 miles from I-7 7 n earstreet address 317 Fisher Valley Rd Lat 36.4265 / Long -80.8092 Station Rod Ht. Elevation0.0 2.22 100.00 98.223.0 2.15 100.07 10.405.0 2.50 99.72 10.007.0 2.98 99.24 99.478.0 3.49 98.73 13.108.8 4.00 98.22 1.259.0 4.96 97.26 1.0412.0 5.03 97.19 9.614.0 5.25 96.97 1.3016.0 5.16 97.06 2.0817.0 5.20 97.02 0.01318.0 5.06 97.16 42 B4c18.7 4.00 98.2219.5 2.65 99.5720.0 1.66 100.56Stream Type:Mean Depth at Bankfull:0.386/9/2005G. Mryncza, A. SpillerDischarge (cfs)W / D Ratio:Entrenchment Ratio:Bank Height Ratio:YadkinUT to Fisher RiverXS#1 RiffleRiver Basin:Watershed:XS IDDrainage Area (sq mi):Bankfull Cross-Sectional Area:Date:Field Crew:Bankfull Elevation:SUMMARY DATASlope (ft/ft):Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Yadkin River Basin, UT to Fisher River, XS#1 Riffle90951001051100 102030Station (feet)Elevation (feet)BankfullFlood Prone Area Pebble CountMaterial Size Range (mm) CountUT to Fsher Riversilt/clay0 0.0620Surry County, NCvery fine sand 0.062 0.130Riffle #1 (Sta. 01+00) fine sand0.13 0.250Note:medium sand0.25 0.50coarse sand0.5 15very coarse sand128very fine gravel 2 421fine gravel 4 69fine gravel 6 88medium gravel 8 1111medium gravel 11 166coarse gravel16 227coarse gravel 22 322very coarse gravel 32 459very coarse gravel 45 646small cobble 64 905medium cobble 90 1282large cobble 128 1801very large cobble 180 2560small boulder 256 3620small boulder 362 5120medium boulder 512 10240large boulder1024 20480very large boulder 2048 40960total particle count:100bedrockbased on size percent less than (mm) particle size distributionclay hardpansedimentD16 D35 D50 D65 D84 D95gradation geo mean std devdetritus/woodparticles only2.208 4.18 7.7 13 42 79 4.5 9.6 4.3artificialbased on percent by substrate typetotal count: 100total countsilt/clay sand gravel cobble boulder bedrock hardpan wood/det artificial0% 13% 79% 8% 0% 0% 0% 0% 0%0%10%20%30%40%50%60%70%80%90%100%0.01 0.1 1 10 100 1000 10000particle size (mm)percent finer than0510152025number of particles cumulative %# of particles Station Rod Ht. Elevation0.0 1.33 100.00 97.783.0 1.78 99.55 11.605.0 2.35 98.98 8.355.5 2.82 98.51 100.055.7 3.81 97.52 6.0 4.52 96.81 2.276.5 5.79 95.54 1.398.0 5.82 95.51 6.09.0 5.50 95.83 10.0 5.02 96.31 0.8511.5 4.80 96.53 0.00113.0 3.90 97.43 52 B4c14.0 3.55 97.7816.0 3.03 98.3020.0 2.66 98.67Stream Type:Mean Depth at Bankfull:0.386/9/2005G. Mryncza, A. SpillerDischarge (cfs)W / D Ratio:Entrenchment Ratio:Bank Height Ratio:YadkinUT to Fisher RiverXS#3 PoolRiver Basin:Watershed:XS IDDrainage Area (sq mi):Bankfull Cross-Sectional Area:Date:Field Crew:Bankfull Elevation:SUMMARY DATASlope (ft/ft):Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Yadkin River Basin, UT to Fisher River, XS#3 Pool90951001051100 102030Station (feet)Elevation (feet)BankfullFlood Prone Area Station Rod Ht. Elevation0.0 2.68 100.00 98.123.0 2.94 99.74 13.405.0 3.61 99.07 11.626.0 4.10 98.58 100.156.8 4.56 98.12 7.0 4.70 97.98 2.039.0 4.94 97.74 1.1511.0 5.21 97.47 10.112.0 5.64 97.04 13.0 6.00 96.68 0.8115.0 6.59 96.09 0.00117.0 6.42 96.26 56 B4c18.0 6.50 96.1818.2 4.93 97.7519.0 3.56 99.1220.0 2.80 99.88Stream Type:Mean Depth at Bankfull:0.386/9/2005G. Mryncza, A. SpillerDischarge (cfs)W / D Ratio:Entrenchment Ratio:Bank Height Ratio:YadkinUT to Fisher RiverXS#2 PoolRiver Basin:Watershed:XS IDDrainage Area (sq mi):Bankfull Cross-Sectional Area:Date:Field Crew:Bankfull Elevation:SUMMARY DATASlope (ft/ft):Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Yadkin River Basin, UT to Fisher River, XS#2 Pool90951001051100 102030Station (feet)Elevation (feet)BankfullFlood Prone Area Station Rod Ht. Elevation0.0 4.62 100.00 98.283.0 5.54 99.08 10.707.0 6.01 98.61 9.008.5 6.34 98.28 99.739.0 7.04 97.58 20.509.5 7.66 96.96 1.4511.0 7.67 96.95 1.1912.0 7.79 96.83 7.614.0 7.58 97.04 2.3016.0 7.57 97.05 1.0017.0 7.51 97.11 0.01317.5 6.34 98.28 46 B4c19.0 5.90 98.7221.0 5.06 99.5625.0 4.37 100.25Slope (ft/ft):Bankfull Width:Flood Prone Area Elevation:Flood Prone Width:Max Depth at Bankfull:Bankfull Elevation:SUMMARY DATADrainage Area (sq mi):Bankfull Cross-Sectional Area:Date:Field Crew:YadkinUT to Fisher RiverXS#4 RiffleRiver Basin:Watershed:XS IDStream Type:Mean Depth at Bankfull:0.386/9/2005G. Mryncza, A. SpillerDischarge (cfs)W / D Ratio:Entrenchment Ratio:Bank Height Ratio:Yadkin River Basin, UT to Fisher River, XS#4 Riffle90951001051100 102030Station (feet)Elevation (feet)BankfullFlood Prone Area Pebble CountMaterial Size Range (mm) CountUT to Fsher Riversilt/clay0 0.0621Surry County, NCvery fine sand 0.062 0.130Riffle #2 (Sta. 02+55) fine sand0.13 0.250Note:medium sand0.25 0.50coarse sand0.5 18very coarse sand1210very fine gravel 2 416fine gravel 4 616fine gravel 6 810medium gravel 8 1112medium gravel 11 1612coarse gravel16 227coarse gravel 22 324very coarse gravel 32 453very coarse gravel 45 640small cobble 64 901medium cobble 90 1280large cobble 128 1800very large cobble 180 2560small boulder 256 3620small boulder 362 5120medium boulder 512 10240large boulder1024 20480very large boulder 2048 40960total particle count:100bedrockbased on size percent less than (mm) particle size distributionclay hardpansedimentD16 D35 D50 D65 D84 D95gradation geo mean std devdetritus/woodparticles only1.625 4.00 5.8 9 16 29 3.1 5.0 3.1artificialbased on percent by substrate typetotal count: 100total countsilt/clay sand gravel cobble boulder bedrock hardpan wood/det artificial1% 18% 80% 1% 0% 0% 0% 0% 0%0%10%20%30%40%50%60%70%80%90%100%0.01 0.1 1 10 100 1000 10000particle size (mm)percent finer than024681012141618number of particles cumulative %# of particles Pebble CountMaterial Size Range (mm) CountUT to Fsher Riversilt/clay0 0.0620Surry County, NCvery fine sand 0.062 0.130fine sand0.13 0.250Note:Reach Pebble Countmedium sand0.25 0.52coarse sand0.5 17very coarse sand1215very fine gravel 2 413fine gravel 4 69fine gravel 6 810medium gravel 8 119medium gravel 11 165coarse gravel16 227coarse gravel 22 326very coarse gravel 32 457very coarse gravel 45 646small cobble 64 904medium cobble 90 1280large cobble 128 1800very large cobble 180 2560small boulder 256 3620small boulder 362 5120medium boulder 512 10240large boulder1024 20480very large boulder 2048 40960total particle count:100bedrockbased on size percent less than (mm) particle size distributionclay hardpansedimentD16 D35 D50 D65 D84 D95gradation geo mean std devdetritus/woodparticles only1.382 3.60 6.7 11 34 60 4.9 6.8 4.9artificialbased on percent by substrate typetotal count: 100total countsilt/clay sand gravel cobble boulder bedrock hardpan wood/det artificial0% 24% 72% 4% 0% 0% 0% 0% 0%0%10%20%30%40%50%60%70%80%90%100%0.01 0.1 1 10 100 1000 10000particle size (mm)percent finer than0246810121416number of particles cumulative %# of particles Elevation BM: 100inc BS HI FS FS depth FS FS FS FS AZ ELEV ELEV ELEV ELEV ELEV ELEVnotes distance station0100 TP bed water LB RB BKFWSazimuth bed water srf LF RB BKF WS51004.45 4.3495.55#N/A #N/A #N/A #N/A95.669141004.94 3.77 4.5495.06#N/A #N/A #N/A96.23 95.468221005.34 4.6594.66#N/A #N/A #N/A #N/A95.353251005.2594.75#N/A #N/A #N/A #N/A #N/A10351005.34 3.84 4.6594.66#N/A #N/A #N/A96.16 95.358431005.3894.62#N/A #N/A #N/A #N/A #N/A4471005.36 4.6594.64#N/A #N/A #N/A #N/A95.353501005.27 4.6694.73#N/A #N/A #N/A #N/A95.345551005.21 3.7294.79#N/A #N/A #N/A96.28#N/A9641004.66#N/A #N/A #N/A #N/A #N/A95.34569 -0.5399.474.48 4.3294.99#N/A #N/A #N/A #N/A95.15128199.474.65 4.5194.82#N/A #N/A #N/A #N/A94.9628399.475.2694.21#N/A #N/A #N/A #N/A #N/A58899.475.25 3.74 4.5194.22#N/A #N/A #N/A95.73 94.9639199.474.84 4.694.63#N/A #N/A #N/A #N/A94.8769799.475.0994.38#N/A #N/A #N/A #N/A #N/A1110899.475.43 5.0694.04#N/A #N/A #N/A #N/A94.41411299.475.5693.91#N/A #N/A #N/A #N/A #N/A1312599.475.59 4.49 5.2593.88#N/A #N/A #N/A94.98 94.221814399.474.64#N/A #N/A #N/A #N/A94.83#N/A-1612799.475.5593.92#N/A #N/A #N/A #N/A #N/A813599.475.8 5.5393.67#N/A #N/A #N/A #N/A93.94514099.476.16 5.6193.31#N/A #N/A #N/A #N/A93.86214299.476.46 4.6493.01#N/A #N/A #N/A94.83#N/A514799.476.7192.76#N/A #N/A #N/A #N/A #N/A214999.476.59 5.6192.88#N/A #N/A #N/A #N/A93.86615599.475.94 5.6193.53#N/A #N/A #N/A #N/A93.86716299.476.1 5.7393.37#N/A #N/A #N/A #N/A93.74817099.477.04 4.8 5.7392.43#N/A #N/A #N/A94.67 93.74317399.476.7892.69#N/A #N/A #N/A #N/A #N/A718099.476.13 5.7393.34#N/A #N/A #N/A #N/A93.748188 -1.5697.914.67 4.2393.24#N/A #N/A #N/A #N/A93.68819697.914.53 4.3993.38#N/A #N/A #N/A #N/A93.52920597.914.97 4.7592.94#N/A #N/A #N/A #N/A93.16420997.915.45 4.7592.46#N/A #N/A #N/A #N/A93.16321297.915.4592.46#N/A #N/A #N/A #N/A #N/A321597.915.6592.26#N/A #N/A #N/A #N/A #N/A221797.915.8892.03#N/A #N/A #N/A #N/A #N/A322097.915.25 3.5992.66#N/A #N/A #N/A94.32#N/A822897.915.2292.69#N/A #N/A #N/A #N/A #N/A423297.915 4.8392.91#N/A #N/A #N/A #N/A93.08523797.915.37 4.9492.54#N/A #N/A #N/A #N/A92.971024797.915.35 4.9792.56#N/A #N/A #N/A #N/A92.9413260 2.46100.377.71 6.38 7.4392.66#N/A #N/A #N/A93.99 92.9416276100.377.6792.7#N/A #N/A #N/A #N/A #N/A4280100.378.0692.31#N/A #N/A #N/A #N/A #N/A4284100.378.73 7.6791.64#N/A #N/A #N/A #N/A92.76290100.378.78 7.6791.59#N/A #N/A #N/A #N/A92.77297100.377.92 7.6792.45#N/A #N/A #N/A #N/A92.7UT to Fisher River Profile919293949596970 50 100 150 200 250 300 350Channel Distance (ft)Elevation (ft)bedwater srfLFRBBKFWSLinear (BKF) TN reduction (lbs/yr) = 51.04 (lbs/ac/yr) x Area (ac)TP reduction (lbs/yr) = 4.23 (lbs/ac/yr) x Area (ac)Reduction (lbs/ac/year) Acres Total Reduction (lbs/year)TN 51.04 12.8 653.3TP 4.23 12.8 54.1Nutrient Reduction from Buffer Adjacent to Agricultural FieldsTN reduction (lbs/yr) = 75.77 (lbs/ac/yr) x Area (ac)TP reduction (lbs/yr) = 4.88 (lbs/ac/yr) x Area (ac)Reduction (lbs/ac/year) Acres Total Reduction (lbs/year)TN 75.8 1.0 73.5TP 4.9 1.0 4.7Total Estimated Nitrogen and Phosphorus Reduction from Exclusion and BufferCattle Exclusion Buffer Total Reduction (lbs/year)TN 653.3 73.5 727TP 54.1 4.7 59Cattle Exclusion (Grazing Pasture)Estimated Reduction in Total Nitrogen and Total Phosphorus for Mill Dam Creek Restoration Project 1. Fecal from direct input# cows Average Weight Total Weight AU=total/1000An animal unit (AU) is one thousand pounds of livestock. Assume avg cow weighs 1500 lb.50 1,500 75,000 75 Fecal Coliform Reduction from Direct Input (col) = 2.2 x 1011(col/AU/day) x AU x 0.085Fecal (col/AU/day) AU Percent Total (col/day) Total(col/year)Total (half‐year grazing)2.200E+11 75 0.085 1.403E+12 5.119E+14 2.560E+142. Fecal from buffer filteringWeighted Curve NumberLand Use / Hydrologic Soil GroupCN Acres Weighted CNPasture (Fair) / A 49 0.1Pasture (Fair) / B 69 10.7Pasture (Fair) / C 79 1.7Pasture (Fair) / D 84 0.3Runoff ‐ Q (inches)P (annual rainfall in inches) Weighted CN S (inches) Ia (inches) Q (inches)46.64 70.5 4.18 0.84 42.0Fecal Coliform Reduction from Buffer Filtration (col) = Runoff’s fecal coliform concentration (col/gal) x Runoff volume (Gal) x 0.85Common Fecal Coliform Fecal conc (col/gal) Q (in) Total acres Volume (in‐ac) Vol (gal)Fecal reduction (col/year)Pastures under Continually Grazing Year‐round1,894,000 Pastures Grazed for Half of Year329,500 42.0 12.8 536.0 14,554,285 4.076E+11Pastures Grazed for Two Months of Year340,900 Total Coliform Reducation Direct Input Reduction2.560E+14Buffer Filtration4.076E+11Total (col/year)2.564E+14Estimate of the Amount of Fecal Coliform Prevented from Entering Stream due to Livestock Exclusion at the Mill Dam Creek Restoration Project70.5 Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 12.3 Site Protection Instrument Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 12.4 Credit Release Schedule Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 All credit releases will be based on the total credit generated as reported in the final design plans unless otherwise documented and provided to the Interagency Review Team following construction. Under no circumstances shall any mitigation project be debited until the necessary DA authorization has been received for its construction or the District Engineer (DE) has otherwise provided written approval for the project in the case where no DA authorization is required for construction of the mitigation project. The DE, in consultation with the Interagency Review Team (IRT), will determine if performance standards have been satisfied sufficiently to meet the requirements of the release schedules below. In cases where some performance standards have not been met, credits may still be released depending on the specifics of the case. Monitoring may be required to restart or be extended, depending on the extent to which the site fails to meet the specified performance standard. The release of project credits will be subject to the criteria described as follows: Stream Credit Release Schedule – 7 year Timeframe Monitoring Year Credit Release Activity Interim Release Total Released 0 Initial Allocation – see requirements below 30% 30% 1 First year monitoring report demonstrates performance standards are being met 10% 40% 2 Second year monitoring report demonstrates performance standards are being met 10% 50% 3 Third year monitoring report demonstrates performance standards are being met 10% 60% 4 Fourth year monitoring report demonstrates performance standards are being met 5% 65% (75%*) 5 Fifth year monitoring report demonstrates performance standards are being met 10% 75% (85%*) 6 Sixth year monitoring report demonstrates performance standards are being met 5% 80% (90%*) 7 Seventh year monitoring report demonstrates performance standards are being met, and project has received close‐out approval from IRT 10% 90% (100%*) *See Subsequent Credit Releases description below Initial Allocation of Released Credits The initial allocation of released credits, as specified in the mitigation plan can be released by the NCDMS without prior written approval of the DE upon satisfactory completion of the following activities: a. Approval of the final Mitigation Plan b. Recordation of the preservation mechanism, as well as a title opinion acceptable to the USACE covering the property c. Completion of project construction (the initial physical and biological improvements to the mitigation site) pursuant to the mitigation plan; Per the NCDMS Instrument, construction means that a mitigation site has been constructed in its entirety, to include planting, and an as‐built report has been produced. As‐built reports must be sealed by an engineer prior to project closeout, if appropriate but not prior to the initial allocation of released credits. d. Receipt of necessary DA permit authorization or written DA appr oval for projects where DA permit issuance is not required Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 Subsequent Credit Releases All subsequent credit releases must be approved by the DE, in consultation with the IRT, based on a determination that required performance standards have been achieved. For stream project with a 7‐year monitoring period, a reserve of 10% of a site’s total stream credits shall be released after four bankfull events have occurred, in separate years, provided the channel is stable and all other performance standards are met. In the event that less than four bankfull events occur during the monitoring period, release of these reserve credits shall be at the discretion of the IRT. As projects approach milestones associated with credit release, the NCDMS will submit a request for credit release to the DE along with documentation substantiating achievement of criteria required for release to occur. This documentation will be included with the annual monitoring report. Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 12.5 Financial Assurance Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 Pursuant to Section IV H and Appendix III of the Division of Mitigation Service’s In‐Lieu Fee Instrument dated July 28, 2010, the North Carolina Department of Environmental Quality (formerly NCDENR) has provided the U.S. Army Corps of Engineers Wilmington District with a formal commitment to fund projects to satisfy mitigation requirements assumed by DMS. This commitment provides financial assurance for all mitigation projects implemented by the program. Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 12.6 Maintenance Plan Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 The site will be monitored on a regular basis, with a physical inspection of the site conducted a minimum of once per year throughout the post‐construction monitoring period until performance standards are met. These site inspections may identify site components and features that require routine maintenance. Routine maintenance should be expected most often in the first two years following site construction and may include the following. Maintenance needs or actions will be recorded in the annual monitoring reports. See the Section 12.9 for more information on invasive species. Planned Maintenance Component/Feature Maintenance Through Project Close‐Out Stream Routine channel maintenance and repair activities may include securing of loose coir matting and supplemental installations of live stakes and other target vegetation along the channel. Areas where stormwater and floodplain flows intercept the channel (such as the proposed water quality treatment areas) may also require maintenance to prevent bank failures, knick points, and erosion. Vegetation Vegetation shall be maintained to ensure the health and vigor of the targeted plant community. Any vegetation control requiring herbicide application will be performed in accordance with NC Department of Agriculture (NCDA) rules and regulations. Site Boundary Site boundaries shall be identified in the field to ensure clear distinction between the mitigation site and adjacent properties. Boundaries may be identified by fence, marker, bollard, post, tree‐blazing, or other means as allowed by site conditions and/or conservation easement. Boundary markers disturbed, damaged, or destroyed will be repaired and/or replaced on an as needed basis up until the project is closed out. Beaver Control The site will be monitored for the presence of beaver. Adaptive management approaches will be used to evaluate whether or not beaver or their structures should be controlled at the site. Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 12.7 Stream and Wetland Delineation (Incl. Stream Identification Forms) Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 November 14, 2016 Mr. William Elliott Asheville Regulatory Field Office US Army Corps of Engineers 151 Patton Avenue, Room 208 Asheville, North Carolina 28801-5006 Subject: Request for Preliminary Jurisdictional Determination Mill Dam Creek Restoration Site Yadkin County, North Carolina Dear Mr. Elliott; KCI has completed a delineation of streams and wetlands for the above referenced project. The attached information, including required forms, tables, and figures, is submitted for your review and determination of jurisdiction under the Clean Water Act (CWA). Project Description & Methodology As shown in Figure 1, the Mill Dam Creek Restoration Site is located in Yadkin County, NC within the Yadkin River Basin (USGS HUC 03040101). This restoration will be done for the North Carolina Division of Mitigation Services (DMS) In-Lieu Fee Program. This delineation was performed in compliance with methodology set forth in the U.S. Army Corps of Engineers (USACE) Wetland Delineation Manual (USACE 1987) and subsequent guidance including the Eastern Mountains and Piedmont Regional Supplement. Streams were assessed for jurisdiction under the CWA using field indications of ordinary high water mark and the North Carolina Division of Water Quality (NCDWQ) Stream Identification Form, Version 4.11. Wetlands were delineated using survey flagging at regular locations along the wetland-upland boundary. All boundaries either form complete polygons, tie to surface water features such as streams or ponds, or tie to the edge of the study area. Streams points were collected using sub-meter GPS technology at representative points to depict center lines. Wetland Determination Forms were completed for each type of wetland community encountered. Delineation Results Figure 2 is presented using the East Bend US Geological Survey 1:24,000 Quadrangle Map. Figure 3 presents the results of the delineation, including streams and wetlands overlaid on 2014 Statewide Aerial Photographs. Table 1 presents detailed information on the jurisdictional stream within the study area, including status (intermittent or perennial), length, width, NCDWQ Score, and latitude/longitude. Based on field data, approximately 12,921 linear feet of stream are present within the study area. Table 2 presents detailed information on each wetland feature including NC Wetland Assessment Method type, Hydrologic Class, Cowardin Class, size, representative wetland delineation form identification, and latitude/longitude. Based on field data, there are approximately 0.43 acres of wetlands and 0.44 acres of pond present within the study area. We respectfully request your review of this information, so that a preliminary jurisdictional determination under the CWA may be obtained. If you have any questions, need additional information, or would like to schedule a site visit, please contact me at your earliest convenience at (919) 278-2533 or Joe.Sullivan@kci.com. Sincerely, KCI Associates of North Carolina Joseph Sullivan Environmental Scientist Attachments: - Jurisdictional Determination (JD) Request Form - Preliminary Jurisdictional Determination Form - Table 1: Stream Summary Table - Table 2: Wetland Summary Table - Table 3: Surface Water Summary Table - Figure 1: Vicinity Map - Figure 2: USGS Map - Figure 3: Jurisdictional Features Map - Stream and Wetland Data Forms - Offers to Purchase Easement Restrictions Mill Dam Creek Restoration Site Stream Summary Table November 2016 Table 1. Length Width NCDWQ Stream Status (Feet)(Feet)Score Latitude Longitude UT to Hall Creek (UTHC)Perennial 6,130 7 -36.2415 -80.5219 T1 Perennial 757 5 41 36.2347 -80.5200 T1A Perennial 744 5 -36.2337 -80.5210 T2 Perennial 616 5 32 36.2351 -80.5183 T3 Perennial 346 4 35 36.2360 -80.5198 T4 Intermittent 171 4 26 36.2372 -80.5200 T5 Perennial 1,174 5 37.5 36.2378 -80.5183 T5B Perennial 321 4 32 36.2377 -80.5175 T6 Perennial 638 6 32 / 33.5 36.2395 -80.5190 T6A Perennial 123 4 -36.2395 -80.5182 T7 Perennial 468 6 40.5 36.2409 -80.5217 T8 Perennial 888 5 36.5 36.2408 -80.5258 T8A Perennial 222 5 -36.2415 -80.5261 T9 Perennial 124 5 39.5 36.2431 -80.5215 Drain 2 Intermittent 199 5 20 36.2422 -80.5217 Stream Name Page 1 of 2 Mill Dam Creek Restoration Site Wetland and Surface Water Summary Tables November 2016 Table 2. Wetland Hydrologic Cowardin Size ID NCWAM Class Class (Acres)WET UP Latitude Longitude WA Headwater Forest Riparian PFO 0.11 X X 36.2408 -80.5218 WB Bottomland Hardwood Forest Riparian PFO 0.03 WA WA 36.2390 -80.5202 WC Headwater Forest Riparian PEM 0.10 WA WA 36.2360 -80.5205 WE Headwater Forest Riparian PFO 0.07 N/A WA 36.2397 -80.5181 WG Headwater Forest Riparian PSS 0.01 X X 36.2404 -80.5248 WH Headwater Forest Riparian PFO 0.06 WG WG 36.2410 -80.5260 WI Headwater Forest Riparian PFO 0.02 WG WG 36.2411 -80.5261 WJ Headwater Forest Riparian PFO 0.02 WG WG 36.2413 -80.5262 WK Headwater Forest Riparian PSS 0.01 WG WG 36.2416 -80.5256 Table 2. Pond Isolated Size ID (Y/N)(Acres)Latitude Longitude PA No 0.44 36.2396 -80.5185 USACE Forms X = Data Forms Completed N/A = Wetland Forms not completed due to animal interference. PFO = Palustrine Forested; PSS = Palustrine Scrub-Shrub; PEM = Palustrine Emergent Page 2 of 2 ÊÚ EAST BEND YadkinRiver A ra ratRiv e r67 £¤52 PROJECT SITE VICINITY MAPMILL DAM CREEK RESTORATION SITEYADKIN COUNTY, NC ±0 1.50.75 Miles ÊÚ County Boundary ÊÚ Project Site Location Major Roads Minor Roads Major Rivers Cities and Towns DAVIEIREDELL YADKIN SURRY WILKESFO R S Y T HSTOKES SHADY GROVE CHURCH RDSHOALS RD Source: USGS DRG, East Bend Quad. FIGURE 2. USGS TOPOGRAPHIC MAPMILL DAM CREEK RESTORATION SITEYADKIN COUNTY, NC ±0 1,000500 Feet Project Easement Shady Grove Church RdPecan R idge D r Shoals RdAztec Dr T5A T6 A PA WA WK WC WE WH WB WIWJ WG UTHC T8 T5T9 T6 T2 T1AT7T3 T1T5B T8A T4 T8 T6UTHC Drain 2 UTHC U T H C T 5 T1NC OneMap, NC Center for Geographic Information and Analysis, NC 911 Board ²Image Source: NC OneMap2014 Aerial Imagery 400 0 400200 Feet Figure 3: Jurisdictional Features MapMill Dam Creek Restoration SiteYadkin County, NC November 2016 Project Easement Ephemeral Channels Intermittent Streams Perennial Streams Wetlands Pond Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 12.8 Approved Jurisdictional Determination Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 12.9 Invasive Species Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 The site will be monitored for the presence of invasive species during both the visual assessments and vegetation plot monitoring events and will follow the guidance in the Wilmington District Stream and Wetland Compensatory Mitigation Update (NCIRT 2016) regarding invasive species. A list of non‐native invasive species for North Carolina is found in the NC SAM User Manual Appendix I. Per the NCIRT 2016 guidance, invasive species management should occur when the functional integrity of the vegetative community is impacted. One or more invasive species may present a threat to the site, but the desirable species may have the ability to survive or outcompete despite the competition. Once an invasive species is identified as impairing the site, physical and/or chemical removal and treatment should occur. Any control measures will be noted in the annual monitoring reports. North Carolina Interagency Review Team. 2016. Wilmington District Stream and Wetland Compensatory Mitigation Update. Last accessed at: http://saw‐reg.usace.army.mil/PN/2016/Wilmington‐District‐ Mitigation‐Update.pdf N.C. Stream Functional Assessment Team. 2016. N.C. Stream Assessment Method (NC SAM) User Manual. (https://ribits.usace.army.mil/ribits_apex/f?p=107:150:16800695257725::NO::P150_DOCUMEN T_ID:36298 ) Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 12.10 Approved FHWA Categorical Exclusion Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 Version 1.4, 8/18/05 1 Part 2: All Projects Regulation/Question Response Coastal Zone Management Act (CZMA) 1. Is the project located in a CAMA county? Yes No 2. Does the project involve ground-disturbing activities within a CAMA Area of Environmental Concern (AEC)? Yes No N/A 3. Has a CAMA permit been secured? Yes No N/A 4. Has NCDCM agreed that the project is consistent with the NC Coastal Management Program? Yes No N/A Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) 1. Is this a “full-delivery” project? Yes No 2. Has the zoning/land use of the subject property and adjacent properties ever been designated as commercial or industrial? Yes No N/A 3. As a result of a limited Phase I Site Assessment, are there known or potential hazardous waste sites within or adjacent to the project area? Yes No N/A 4. As a result of a Phase I Site Assessment, are there known or potential hazardous waste sites within or adjacent to the project area? Yes No N/A 5. As a result of a Phase II Site Assessment, are there known or potential hazardous waste sites within the project area? Yes No N/A 6. Is there an approved hazardous mitigation plan? Yes No N/A National Historic Preservation Act (Section 106) 1. Are there properties listed on, or eligible for listing on, the National Register of Historic Places in the project area? Yes No 2. Does the project affect such properties and does the SHPO/THPO concur? Yes No N/A 3. If the effects are adverse, have they been resolved? Yes No N/A Uniform Relocation Assistance and Real Property Acquisition Policies Act (Uniform Act) 1. Is this a “full-delivery” project? Yes No 2. Does the project require the acquisition of real estate? Yes No N/A 3. Was the property acquisition completed prior to the intent to use federal funds? Yes No N/A 4. Has the owner of the property been informed: * prior to making an offer that the agency does not have condemnation authority; and * what the fair market value is believed to be? Yes No N/A Version 1.4, 8/18/05 2 Part 3: Ground-Disturbing Activities Regulation/Question Response American Indian Religious Freedom Act (AIRFA) 1. Is the project located in a county claimed as “territory” by the Eastern Band of Cherokee Indians? Yes No 2. Is the site of religious importance to American Indians? Yes No N/A 3. Is the project listed on, or eligible for listing on, the National Register of Historic Places? Yes No N/A 4. Have the effects of the project on this site been considered? Yes No N/A Antiquities Act (AA) 1. Is the project located on Federal lands? Yes No 2. Will there be loss or destruction of historic or prehistoric ruins, monuments or objects of antiquity? Yes No N/A 3. Will a permit from the appropriate Federal agency be required? Yes No N/A 4. Has a permit been obtained? Yes No N/A Archaeological Resources Protection Act (ARPA) 1. Is the project located on federal or Indian lands (reservation)? Yes No 2. Will there be a loss or destruction of archaeological resources? Yes No N/A 3. Will a permit from the appropriate Federal agency be required? Yes No N/A 4. Has a permit been obtained? Yes No N/A Endangered Species Act (ESA) 1. Are federal Threatened and Endangered species and/or Designated Critical Habitat listed for the county? Yes No 2. Is Designated Critical Habitat or suitable habitat present for listed species? Yes No N/A 3. Are T&E species present or is the project being conducted in Designated Critical Habitat? Yes No N/A 4. Is the project “likely to adversely affect” the specie and/or “likely to adversely modify” Designated Critical Habitat? Yes No N/A 5. Does the USFWS/NOAA-Fisheries concur in the effects determination? (By virtue of no-response) Yes No N/A 6. Has the USFWS/NOAA-Fisheries rendered a “jeopardy” determination? Yes No N/A Version 1.4, 8/18/05 3 Executive Order 13007 (Indian Sacred Sites) 1. Is the project located on Federal lands that are within a county claimed as “territory” by the EBCI? Yes No 2. Has the EBCI indicated that Indian sacred sites may be impacted by the proposed project? Yes No N/A 3. Have accommodations been made for access to and ceremonial use of Indian sacred sites? Yes No N/A Farmland Protection Policy Act (FPPA) 1. Will real estate be acquired? Yes No 2. Has NRCS determined that the project contains prime, unique, statewide or local important farmland? Yes No N/A 3. Has the completed Form AD-1006 been submitted to NRCS? Yes No N/A Fish and Wildlife Coordination Act (FWCA) 1. Will the project impound, divert, channel deepen, or otherwise control/modify any water body? Yes No 2. Have the USFWS and the NCWRC been consulted? Yes No N/A Land and Water Conservation Fund Act (Section 6(f)) 1. Will the project require the conversion of such property to a use other than public, outdoor recreation? Yes No 2. Has the NPS approved of the conversion? Yes No N/A Magnuson-Stevens Fishery Conservation and Management Act (Essential Fish Habitat) 1. Is the project located in an estuarine system? Yes No 2. Is suitable habitat present for EFH-protected species? Yes No N/A 3. Is sufficient design information available to make a determination of the effect of the project on EFH? Yes No N/A 4. Will the project adversely affect EFH? Yes No N/A 5. Has consultation with NOAA-Fisheries occurred? Yes No N/A Migratory Bird Treaty Act (MBTA) 1. Does the USFWS have any recommendations with the project relative to the MBTA? Yes No 2. Have the USFWS recommendations been incorporated? Yes No N/A Wilderness Act 1. Is the project in a Wilderness area? Yes No 2. Has a special use perm it and/or easement been obtained from the maintaining federal agency? Yes No N/A Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 12.11 Agency Correspondence Draft Mitigation Plan Mill Dam Creek Restoration Site September 25, 2018 DMS Project Number 97136 LANDMARK CENTER II, SUITE 220 4601 SIX FORKS ROAD RALEIGH, NC 27609 919-783-9214 (FAX) 919-783-9266 ENGINEERS SURVEYORS SCIENTISTS CONSTRUCTION MANAGERS Memoranda TO: Matthew Reid, DMS PM Todd Tugwell, ACOE FROM: Tim Morris, KCI DATE: July 25, 2016 SUBJECT: Mill Dam Creek Stream Restoration Project IRT Site Review Meeting KCI Project Number: 201601703 Attendees: Sue Homewood, NC DWR Todd Tugwell, ACOE Paul Weisner, DMS Matthew Reid, DMS Tim Morris, KCI Steve Stokes, KCI Adam Spiller, KCI An IRT field review was conducted for the above referenced project on July 19, 2016 starting at 9:00 am. Weather was partly sunny. According to Weather Underground approximately 1.16” of rainfall had fallen in West Bend in the previous 14 days and 2.50” had fallen since the beginning of July. All project streams (UTHC and Tributaries 1 -9) were reviewed. Tributary 1 and the upper portion of Tributary 6 were dry. All other streams exhibited flow at the time of the site visit. Tim Morris and Adam Spiller from KCI presented the project to the attendees. The following issues and concerns were documented at the meeting and will be addressed in the future development of the site. T1A – IRT generally OK with approach. Consider adding easement to cover eroding ephemeral drains and for BMP development. Must monitor channel carefully to ensure there is no stream loss associated with bringing the stream bed up. IRT suggested a stream gauge to monitor flow during monitoring period. T1- Dry at the time of site visit. Corps indicated that they probably would not require mitigation if they were permitting an impact to this stream. Seemed OK with it in the context of the entire Memorandum Page 2 of 3 July 25, 2016 project since this was the only restoration reaches on an intermittent (dry) stream. Suggested a stream gauge here to monitor flow during monitoring period. T2 – IRT was OK with R (lower) and E2 (upper) approach. IRT discussed possibly doing more R in the upper section in the woods but ultimately backed off that thought. KCI would consider doing more R in the woods if the IRT would grant R credit. The spacing of the trees would allow KCI to do construction with minimal damage to the existing canopy. Additional feedback on T2 approach is appreciated. T3 – IRT was OK with approach, including doing wetland rehabilitation within the emergent seep at the head of the stream. KCI would need to provide a pre-con well if trying to claim wetland credit via rehabilitation. KCI won’t likely have all of this data for inclusion in the Mitigation Plan (MP) plan, but the IRT said it’s fine to keep recording until construction is started as long as in the MP we explain how it will be used once it’s collected (compare to post construction monitoring). DMS does not know at this point if wetland credits will be needed/contracted. T4 – IRT suggested Restoration instead of E2 on this reach (approximately 200’). KCI will modify approach to R. T5 – IRT generally agreed with our approach. Similar to any other “light touch”/E2 reaches, we need to make sure that we quantify the amount of work that’s being done on the stream to illustrate that we’re doing enough work for it to be called E2. For T5A, need to clarify that this isn’t just from a leaky well, but is from an actual spring/seep. T6 – IRT agreed to approach but expressed reservation about E2 on T6 (because it was dry) and questioned the feasibility of removing the dam. KCI to provide detailed justification of E2 on upper portion of T6. KCI intends to remove the dam in its entirety, not just notch the dam. T7 – IRT generally agreed to the R/E2 approach here. The wetland in this area was largely functional and the IRT indicated that it would not be a candidate for rehabilitation. T8 – IRT asked KCI to remove E2 from the beginning of T8A. Because of the presence of the toe-drain, KCI will consider wetland rehab here if DMS is contracting credits. IRT generally OK with the approach for the rest of T8 and T8A. T9 – IRT recommended a 5:1 ratio for the E2 section. Restoration section was OK. KCI will eliminate E2 section as it does not make sense financially (credits do not justify cost). UTHC – IRT generally OK with all calls until Mathis property although the IRT expressed Memorandum Page 3 of 3 July 25, 2016 concern about the approach from T6 to the Mathis Property. Mathis property is the second crossing downstream of T6/UTHC confluence. Strong justification for R approach will need to be provided in the MP. IRT requested changing R to E1 on the Mathis Property, then E2 from bottom of Mathis Property to the next crossing, then E1 from that crossing to the powerline crossing, then E2 to the bottom of the project. (see attached mitigation type and extent map) for final changes. Assuming agency concurrence with this memo, this approach will result in the deduction of approximately 675 credits from the initially proposed 11,000 credits. Meeting adjourned @ approximately 1pm. Key: R – Restoration E1 – Enhancement 1 E2 – Enhancement 2 UTHC – Unnamed Tributary to Hall Creek !. !. !. !. !. NC OneMap, NC Center for Geographic Information and Analysis, NC 911 Board Source: NC StatewideOrthoimagery, 2014. FIGURE 11. PROPOSED MITIGATION TYPE AND EXTENTMILL DAM CREEK RESTORATION SITEYADKIN COUNTY, NC ±0 700350 Feet Project Parcels Mitigation Type Restoration (7,295 lf / 7,295 SMCs) Enhancement 1 (2,068 lf / 1,379 SMCs) Enhancement 2 (4,127 lf / 1,651 SMCs) No Mitigation !.Proposed BMP Locations Proposed Easement (36.9 ac) Begin T1 Begin T1A Begin UT to Hall Creek (UTHC) Begin T2 Begin T4 Begin T5 Begin T5A Begin T5BT5 T1 Begin T6 Begin T6A T6 Begin T7 UT H C UTHCBegin T3 Begin T9UTHC Begin T8A Begin T8 T8 Updated 7/26/2016