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HomeMy WebLinkAbout20140866 Ver 1_Meeting Minutes IRT Post Contract 20140813_20140825Strickland, Bev From: Kulz, Eric Sent: Wednesday, August 27, 2014 12:31 PM To: Strickland, Bev Subject: FW: Flea Hill meeting minutes (UNCLASSIFIED) Attachments: Flea Hill_ IRTpostContract_ SiteMeetingMinutes _13Aug2014.docx; Flea Hill_ Pro posed MitFeatures _postIRT_13Aug2014.pdf, Fig6A_FleaHill_ Pro posed MitFeatures _OptA_rev2.pdf Another for 14 -0866 - - - -- Original Message---- - From: Tugwell, Todd SAW [ mailto :Todd.Tugwell @usace.army.mil] Sent: Monday, August 25, 2014 2:02 PM To: Chris Roessler; Crumbley, Tyler SAW; Kulz, Eric Cc: Schaffer, Jeff; Smith, Heather; Scott Hunt; Wes Newell (newel I @ backwater. biz); Wilson, Travis W.; Dunn, Maria T. Subject: RE: Flea Hill meeting minutes (UNCLASSIFIED) Classification: UNCLASSIFIED Caveats: NONE Chris, Putting a BMP on an existing channel is definitely frowned on (or worse by EPA), but in this circumstance you would effectively be routing flow through a wetland, rather than putting the wetland on a stream, which is different. I also think that we have some latitude to do this kind of thing for restoration projects since you will have to relocated the larger ditch anyway. NW 27 has some language that talks about conversion of one aquatic resource into another, but in this case you will gain wetland without losing stream, which is the key. With regard to providing credit for the BMP, are you talking about just the BMP at the end of R2b, or all the BMPs that receive flow from the fields (I thought there were more than one)? And what is the difference? We have had other projects where we have given credit for wetland BMPs that were designed to an appropriate standard, but those were a little different in that the BMPs were on non - jurisdictional drainages that were going to be excluded from the project if we did not find a way to provide credit. Also, the stream restorations on those projects were more traditional in the sense that the BMPs were providing their own function on top of what the stream restoration was doing. In this case, I think it was the concept of the BMPs and associated wetland /floodplain function that ultimately convinced the IRT that the project was providing any uplift to begin with, otherwise you are just relocating a ditch. So now to award additional credit for the BMPs themselves seems to be further watering down the amount of functional uplift the project will provide. I think we also agreed to a better credit ratio on the trib coming in from the west, as well, which should help you out with the overall amount of credit to be produced by the project. Based on the above, I don't believe additional credit is warranted in this circumstance, but I would like to hear from other IRT members who were at the site meeting. I've copied Travis Wilson and Maria Dunn with the WRC since I don't think they were included in the original email. (Travis and Maria, please read from beginning. I've attached the referenced minutes as well.) Todd - - - -- Original Message - - - -- From: Chris Roessler [ mailto :Croessler @mbakerintl.com] Sent: Monday, August 25, 2014 10:28 AM To: Tugwell, Todd SAW; Crumbley, Tyler SAW; Kulz, Eric (eric.kulz @ncdenr.gov) Cc: Jeff Schaffer (jeff.schaffer @ncdenr.gov); Smith, Heather (heather.c.smith @ncdenr.gov); Scott Hunt; Wes Newell (newel I @ backwater. biz) Subject: [EXTERNAL] RE: Flea Hill meeting minutes (UNCLASSIFIED) Thanks, Todd. Your description of the location is correct. That's interesting - I didn't realize that you could essentially impound a jurisdictional stream by creating a wetland along it as long as no stream length is lost. I thought low flow must be maintained at all times through a jurisdictional channel (whether it is new or existing). So, in light of your explanation, I agree that a wetland between the culvert and the restored channel is appropriate. Since this particular outlet is a larger system that will require more study, grading, etc., would it be acceptable to propose valley length credit for this wetland only? -Chris - - - -- Original Message---- - From: Tugwell, Todd SAW [ mailto :Todd.Tugwell @usace.army.mil] Sent: Monday, August 25, 2014 10:15 AM To: Chris Roessler; Crumbley, Tyler SAW; Kulz, Eric (eric.kulz @ncdenr.gov) Cc: Jeff Schaffer (jeff.schaffer @ncdenr.gov); Smith, Heather (heather.c.smith @ncdenr.gov); Scott Hunt; Wes Newell (newel I @ backwater. biz) Subject: RE: Flea Hill meeting minutes (UNCLASSIFIED) Classification: UNCLASSIFIED Caveats: NONE Thanks for the explanation, Chris. With regard to Reach R2b, are you saying can't do any wetland treatment /BMP on that channel because it is jurisdictional or because of the size of the watershed? My recollection is that the tributary in question picks up drainage from a field ditch to the east and also from a tributary in the cutover area, and then flows through a culvert directly into the ditch (the tributary to be restored). If you put a wetland bmp between the outfall of the culvert (which is not proposed to be replaced) and the restored channel, you would not be losing any jurisdictional stream, just adding a wetland between the two. I think the IRT emphasized during the meeting that the treatment resulting from the constructed floodplain and wetland BMPs that treat the field runoff is really going to be the primary source of functional uplift with this project, so if you construct another short stream segment, you will be bypassing any treatment. Any thoughts on this? Todd - - - -- Original Message---- - From: Chris Roessler [ mailto :Croessler @mbakerintl.com] Sent: Monday, August 25, 2014 8:40 AM To: Tugwell, Todd SAW; Crumbley, Tyler SAW; Kulz, Eric (eric.kulz @ncdenr.gov) Cc: Jeff Schaffer (jeff.schaffer @ncdenr.gov); Smith, Heather (heather.c.smith @ncdenr.gov); Scott Hunt; Wes Newell (newel I @ backwater. biz) Subject: [EXTERNAL] RE: Flea Hill meeting minutes (UNCLASSIFIED) OK, Todd et al., back from vacation. Please see my responses below your comments starting in CAPS (not for emphasis, just to distinguish my comments from yours;). Please let me know if you're OK with adding this email (including my comments) to the files or would like me to update the minutes. No problem either way. Thank you, Chris Chris Roessler I Technical Manager I Michael Baker Engineering, Inc. 8000 Regency Parkway, Suite 600 1 Cary, NC 27518 1 919.481.5737 (direct) 1 919.624.0905 (cell) 1919.463.5490 (fax) croessler @mbakerintl.com I www.mbakerintl.com - - - -- Original Message---- - From: Chris Roessler Sent: Thursday, August 21, 2014 12:40 PM To: Tugwell, Todd SAW; Crumbley, Tyler SAW; Kulz, Eric (eric.kulz @ncdenr.gov) Cc: Jeff Schaffer (jeff.schaffer @ncdenr.gov); Smith, Heather (heather.c.smith @ncdenr.gov); Scott Hunt Subject: RE: Flea Hill meeting minutes (UNCLASSIFIED) Thanks for the prompt comments, Todd. I'm on vacation today and tomorrow and will provide a response to the questions you raised on Monday. But basically, I think we're on the same page, just explaining our perspectives. - Chris From: Tugwell, Todd SAW [Todd.Tugwell @usace.army.mil] Sent: Thursday, August 21, 2014 10:42 AM To: Chris Roessler; Crumbley, Tyler SAW; Kulz, Eric (eric.kulz @ncdenr.gov) Cc: Jeff Schaffer (jeff.schaffer @ncdenr.gov); Smith, Heather (heather.c.smith @ncdenr.gov); Scott Hunt Subject: RE: Flea Hill meeting minutes (UNCLASSIFIED) Classification: UNCLASSIFIED Caveats: NONE Chris, I have a couple comments on the minutes you prepared: * One of the things we discussed on the site was making sure that the new channel is small and that you try to get a lot of floodplain access since that is really where any uplift will occur, with the possibility of adding some sinuosity to the stream, at least alternating the channel to opposite sides of the constructed floodplain. AGREED. I thought I captured that with this sentence "Michael Baker Engineering, Inc. (Baker) proposes Priority Level II restoration with an emphasis on frequent overbank flooding to increase floodplain contact. Similarly, the width and extent of the restored floodplain will be maximized to the greatest extent feasible to provide greater contact area with overbank flows." I'D LIKE TO ADD that we'll work out the channel dimension and sinuosity in the mitigation plan after further research, including a study of reference reaches. We'll definitely include pools and target alternating the channel to opposite sides of the floodplain. But I think we'll also want to maximize floodplain LENGTH because if we build a smaller channel that increases overbank flooding frequency then braiding is more likely, which could lead to only getting valley length credit for restoration. If we have low sinuosity then there shouldn't be a problem if there is limited braiding because the valley length and restored channel length will be close. * I believe we discussed the idea of including some vernal pools in the floodplain, if possible. AGREED. * Your notes reference reach R2b, and the possibility of getting credit for any channel constructed. I don't recall if we discussed /agreed to that - my recollection was that there would be some type of treatment downstream of the culverts draining the field, not necessarily channels connecting the culverts to the reconstructed stream, since the idea was to try to treat the runoff that was concentrated trough the culverts, not channel it directly to the stream. Please address this in the mitigation plan. I THOUGHT ABOUT THIS AFTER OUR MEETING AND MY REASONING FOLLOWS. Reach R2b is the continuation of a jurisdictional channel (this is the bigger tributary coming from the west) so we won't be able to do a detained wetland cell below the culvert. Instead, we'll construct a floodplain for it (same as the rest of the project streams), which will need to cross at least the 50 feet of buffer before tying into the main channel. All of this points to the idea that this will also be a restored channel and deserving of credit to compensate construction cost. I'm thinking it will only be about 60 feet or so of channel length. I will also address this in the mitigation plan. * Lastly, I wanted the record to note that the IRT felt that the location proposed for the new channel is not what we believe to be the historic condition on the site, and that the preference would have been to try to reconnect the channel to the existing, sinuous drainage to the east of the current ditch, but that due to limitations caused by upstream flooding, the alternative is to dig a new channel through a upland ridge (IRT's interpretation). AGREED. I don't think you need to update the memo if you don't want to, as I will include this email in our file for our records. Thanks, Todd Tugwell Special Projects Manager Wilmington District, US Army Corps of Engineers 11405 Falls of the Neuse Road Wake Forest, NC 27587 Office: 919 - 846 -2564 Mobile: 919 - 710 -0240 - - - -- Original Message---- - From: Chris Roessler [ mailto :Croessler @mbakerintl.com] Sent: Tuesday, August 19, 2014 9:26 AM To: Tugwell, Todd SAW; Crumbley, Tyler SAW; Kulz, Eric (eric.kulz @ncdenr.gov) Cc: Jeff Schaffer (jeff.schaffer @ncdenr.gov); Smith, Heather (heather.c.smith @ncdenr.gov); Scott Hunt Subject: [EXTERNAL] Flea Hill meeting minutes Hi Todd -> Would you please review these minutes and forward them to the other members of the IRT? Thanks for meeting us out there and considering the site. It sounds good to target multiple overbank flows per year. We'd appreciate any comments you might have by the end of August, even if it's just an OK. Thanks a lot, Chris Chris Roessler I Technical Manager I Michael Baker Engineering, Inc. 8000 Regency Parkway, Suite 600 1 Cary, NC 27518 1 919.481.5737 (direct) 1 919.624.0905 (cell) 1919.463.5490 (fax) croessler @mbakerintl.com< mailto :croessler @mbakerintl.com> I www. mbakerintl .com <http: / /www.mbakerintl.com> <http://www.mbakerintl.com/> Cyan_Baker Logo Centered -01 cid: i mage006. png @01CF83F1.2E000390 Classification: UNCLASSIFIED Caveats: NONE Classification: UNCLASSIFIED Caveats: NONE Classification: UNCLASSIFIED Caveats: NONE Meeting Minutes FLEA HILL RESTORATION PROJECT EEP Contract No. 5998 Michael Baker Engineering, Inc. 8000 Regency Parkway Suite 600 Cary, North Carolina 27518 Phone: 919.463.5488 Fax: 919.463.5490 Date Prepared: August 13, 2014 Meeting Date, Time, August 12, 2014, 10:00 am Location: On -site (Cumberland County, NC) USACE —Tyler Crumbley, Todd Tugwell NCDWR — Eric Kulz NCWRC —Travis Wilson, Maria Dunn Attendees: NCEEP —Jeff Schaffer, Heather Smith, Anjie Ackerman Backwater Environmental , Inc. — Wes Newell, Doug Smith Michael Baker Engineering, Inc. —Scott Hunt, Chris Roessler Subject: Post - contract Site Visit with NCIRT Recorded By: Chris Roessler The post- contract on -site meeting was held on August 12th, 2014 for the Flea Hill Restoration (Full Delivery) Project in Cumberland County, NC. The purposes of this meeting were to: 1. Familiarize the NCIRT with the stream restoration project and discuss basic concepts for the proposed mitigation plan; 2. Reach agreement on mitigation approaches and credit ratios for each project reach and section; 3. Identify and discuss potential concerns /issues based on field observations by participants at the meeting. Before introductions, Chris Roessler provided background on the project and the rationale for the selected mitigation approaches. The driving purpose of this project is functional uplift via water quality improvement through the removal of nutrients and possibly pesticides. Benthic macroinvertebrate monitoring has demonstrated that low dissolved oxygen (DO) is apparent, probably because nutrient loading is causing abundant algal growth, and consequent diurnal DO fluctuations, in the channel. The benthic surveys also suggested that pesticides may be a problem. Michael Baker Engineering, Inc. (Baker) proposes Priority Level II restoration with an emphasis on frequent overbank flooding to increase floodplain contact. Similarly, the width and extent of the restored floodplain will be maximized to the greatest extent feasible to provide greater contact area with overbank flows. Ramial wood chips will be placed below coir fiber matting on portions of the floodplain to promote growth of beneficial saprophytic and mycorrhizal fungi, which will improve pollutant removal and enhance vegetative growth. Observations and conclusions for each reach are noted below. Note: figures from the original proposal and edited versions following this visit are included with these minutes. Reach R1 The group began at the downstream end of the project area and walked upstream along Reach R1. Chris Roessler explained that Priority Level II, rather than Priority Level I, restoration is needed for two reasons: 1) the upstream culvert at Swamp Rd. has an invert elevation of 95.8 feet AMSL; 2) the existing land (presently inaccessible floodplain) to the west of the Flea Hill ditch has elevations that range between 99 and 96 feet AMSL (i.e., the elevation decreases slightly from south to north). Thus, the restored channel will need to begin with an invert elevation of approximately 95 feet AMSL to prevent unacceptable backwater conditions in the existing Flea Hill ditch to Swamp Rd. Secondly, the proposed channel will be less than 1 foot deep and will need to maintain a slope of about 0.0015 ft /ft, which will require earthwork to construct a floodplain at the proposed elevations. The restored channel will begin at elevation of approximately 95 feet AMSL and need to connect to the existing culvert at the downstream end, which has an elevation of 91.6 feet AMSL. Thus, the channel will be necessarily flat, with an average slope of approximately 0.0015 ft /ft. The riffles will be steeper while flat pool slopes will be targeted. Culverts draining the agricultural fields to the west were noted. Below these culverts Baker will design stable outlets as well as wetland cells before connecting flows with the main channel. The first two culverts (i.e., northernmost) drain non - jurisdictional areas, while the third drains a jurisdictional channel. The southernmost channel will require a jurisdictional determination. The wetland cells draining non - jurisdictional channels will not require passage of low flow and may essentially impound the first flush of runoff behind a log weir. The wetland cells draining jurisdictional channels will require passage of low flow and will not be impounded, though a pool feature with a littoral shelf will be designed. Baker does not plan to seek mitigation credit for the wetland cells below the non - jurisdictional channels, but will seek restoration credit for the connecting channels within the project area that are jurisdictional (i.e., large tributary draining from the east into the lower- middle section of Reach R2, labeled as Reach R2b in accompanying figure). Reach R2 The NCIRT considered the possibility of re- routing the restored channel along what appears to be its historical path as shown in aerial photography, but accepted Baker's proposal to build the restored channel in the agricultural fields to the west. Reach R2 will continue the Priority Level II restoration described above. Also as described above, a short additional reach will be added where the jurisdictional tributary enters Reach R2 from the east. This restored channel will be at the same floodplain elevation as Reach R2 and will be called Reach R2b. Reach R3 This reach encompasses the only tributary ditch draining from the west into the project area. Baker had proposed Enhancement Level 1 credit for essentially implementing Priority Level II restoration. The NCIRT recommended calling it restoration if that is what Baker proposes to actually implement. Eric Kulz requested that a pressure transducer be installed where the design stream bed is elevated above the existing bed to demonstrate that jurisdictional status is maintained. Summary The NCIRT accepted Baker's Priority Level II approach with the idea that frequent overbank flooding (i.e., multiple times per year) should occur. Baker will target reference reaches that demonstrate this condition. The NCIRT also recommended that pools with log structures be included even if the design sinuosity is kept low to maintain channel slope and prevent braiding. C'nntarts • Heather Smith will serve as the Project Manager for NCEEP and the main point of contact. Chris Roessler will be the Baker Project Manager and coordinate /submit project deliverables directly to Heather Smith for distribution to all NCIRT team members. Action Items and Next Steos • Project Schedule — Baker stated they are ready to proceed immediately with the Task 1 deliverable (Categorical Exclusion) and do not anticipate project delays. • After the jurisdictional determination has been conducted, any wetland areas that will be impacted by the proposed work (filled or drained) will need to be identified and functional replacement for those losses should be proposed and discussed in the draft mitigation plan. • USACE requires Jurisdictional (JD) stream /wetland calls for the project. Baker will coordinate with Tyler Crumbley for on -site JD verification prior to mitigation plan submittal. • Signage will be needed on all conservation easement areas. This represents Baker's interpretation of the meeting discussions. If any meeting attendees should find any information contained in these meeting minutes to be in error and /or incomplete based on individual comments or conversations, please notify Chris Roessler with corrections /additions as soon as possible. Sincerely, Chris Roessler, Project Manager Michael Baker Engineering, Inc. 8000 Regency Parkway, Suite 600 Cary, NC 27518 Phone: 919.481.5737 Email: croessler @mbakercorp.com Strickland, Bev From: Kulz, Eric Sent: Wednesday, August 27, 2014 12:31 PM To: Strickland, Bev Subject: FW: Flea Hill meeting minutes (UNCLASSIFIED) Attachments: Flea Hill_ IRTpostContract_ SiteMeetingMinutes _13Aug2014.docx; Flea Hill_ Pro posed MitFeatures _postIRT_13Aug2014.pdf, Fig6A_FleaHill_ Pro posed MitFeatures _OptA_rev2.pdf Another for 14 -0866 - - - -- Original Message---- - From: Tugwell, Todd SAW [ mailto :Todd.Tugwell @usace.army.mil] Sent: Monday, August 25, 2014 2:02 PM To: Chris Roessler; Crumbley, Tyler SAW; Kulz, Eric Cc: Schaffer, Jeff; Smith, Heather; Scott Hunt; Wes Newell (newel I @ backwater. biz); Wilson, Travis W.; Dunn, Maria T. Subject: RE: Flea Hill meeting minutes (UNCLASSIFIED) Classification: UNCLASSIFIED Caveats: NONE Chris, Putting a BMP on an existing channel is definitely frowned on (or worse by EPA), but in this circumstance you would effectively be routing flow through a wetland, rather than putting the wetland on a stream, which is different. I also think that we have some latitude to do this kind of thing for restoration projects since you will have to relocated the larger ditch anyway. NW 27 has some language that talks about conversion of one aquatic resource into another, but in this case you will gain wetland without losing stream, which is the key. With regard to providing credit for the BMP, are you talking about just the BMP at the end of R2b, or all the BMPs that receive flow from the fields (I thought there were more than one)? And what is the difference? We have had other projects where we have given credit for wetland BMPs that were designed to an appropriate standard, but those were a little different in that the BMPs were on non - jurisdictional drainages that were going to be excluded from the project if we did not find a way to provide credit. Also, the stream restorations on those projects were more traditional in the sense that the BMPs were providing their own function on top of what the stream restoration was doing. In this case, I think it was the concept of the BMPs and associated wetland /floodplain function that ultimately convinced the IRT that the project was providing any uplift to begin with, otherwise you are just relocating a ditch. So now to award additional credit for the BMPs themselves seems to be further watering down the amount of functional uplift the project will provide. I think we also agreed to a better credit ratio on the trib coming in from the west, as well, which should help you out with the overall amount of credit to be produced by the project. Based on the above, I don't believe additional credit is warranted in this circumstance, but I would like to hear from other IRT members who were at the site meeting. I've copied Travis Wilson and Maria Dunn with the WRC since I don't think they were included in the original email. (Travis and Maria, please read from beginning. I've attached the referenced minutes as well.) Todd - - - -- Original Message - - - -- From: Chris Roessler [ mailto :Croessler @mbakerintl.com] Sent: Monday, August 25, 2014 10:28 AM To: Tugwell, Todd SAW; Crumbley, Tyler SAW; Kulz, Eric (eric.kulz @ncdenr.gov) Cc: Jeff Schaffer (jeff.schaffer @ncdenr.gov); Smith, Heather (heather.c.smith @ncdenr.gov); Scott Hunt; Wes Newell (newel I @ backwater. biz) Subject: [EXTERNAL] RE: Flea Hill meeting minutes (UNCLASSIFIED) Thanks, Todd. Your description of the location is correct. That's interesting - I didn't realize that you could essentially impound a jurisdictional stream by creating a wetland along it as long as no stream length is lost. I thought low flow must be maintained at all times through a jurisdictional channel (whether it is new or existing). So, in light of your explanation, I agree that a wetland between the culvert and the restored channel is appropriate. Since this particular outlet is a larger system that will require more study, grading, etc., would it be acceptable to propose valley length credit for this wetland only? -Chris - - - -- Original Message---- - From: Tugwell, Todd SAW [ mailto :Todd.Tugwell @usace.army.mil] Sent: Monday, August 25, 2014 10:15 AM To: Chris Roessler; Crumbley, Tyler SAW; Kulz, Eric (eric.kulz @ncdenr.gov) Cc: Jeff Schaffer (jeff.schaffer @ncdenr.gov); Smith, Heather (heather.c.smith @ncdenr.gov); Scott Hunt; Wes Newell (newel I @ backwater. biz) Subject: RE: Flea Hill meeting minutes (UNCLASSIFIED) Classification: UNCLASSIFIED Caveats: NONE Thanks for the explanation, Chris. With regard to Reach R2b, are you saying can't do any wetland treatment /BMP on that channel because it is jurisdictional or because of the size of the watershed? My recollection is that the tributary in question picks up drainage from a field ditch to the east and also from a tributary in the cutover area, and then flows through a culvert directly into the ditch (the tributary to be restored). If you put a wetland bmp between the outfall of the culvert (which is not proposed to be replaced) and the restored channel, you would not be losing any jurisdictional stream, just adding a wetland between the two. I think the IRT emphasized during the meeting that the treatment resulting from the constructed floodplain and wetland BMPs that treat the field runoff is really going to be the primary source of functional uplift with this project, so if you construct another short stream segment, you will be bypassing any treatment. Any thoughts on this? Todd - - - -- Original Message---- - From: Chris Roessler [ mailto :Croessler @mbakerintl.com] Sent: Monday, August 25, 2014 8:40 AM To: Tugwell, Todd SAW; Crumbley, Tyler SAW; Kulz, Eric (eric.kulz @ncdenr.gov) Cc: Jeff Schaffer (jeff.schaffer @ncdenr.gov); Smith, Heather (heather.c.smith @ncdenr.gov); Scott Hunt; Wes Newell (newel I @ backwater. biz) Subject: [EXTERNAL] RE: Flea Hill meeting minutes (UNCLASSIFIED) OK, Todd et al., back from vacation. Please see my responses below your comments starting in CAPS (not for emphasis, just to distinguish my comments from yours;). Please let me know if you're OK with adding this email (including my comments) to the files or would like me to update the minutes. No problem either way. Thank you, Chris Chris Roessler I Technical Manager I Michael Baker Engineering, Inc. 8000 Regency Parkway, Suite 600 1 Cary, NC 27518 1 919.481.5737 (direct) 1 919.624.0905 (cell) 1919.463.5490 (fax) croessler @mbakerintl.com I www.mbakerintl.com - - - -- Original Message---- - From: Chris Roessler Sent: Thursday, August 21, 2014 12:40 PM To: Tugwell, Todd SAW; Crumbley, Tyler SAW; Kulz, Eric (eric.kulz @ncdenr.gov) Cc: Jeff Schaffer (jeff.schaffer @ncdenr.gov); Smith, Heather (heather.c.smith @ncdenr.gov); Scott Hunt Subject: RE: Flea Hill meeting minutes (UNCLASSIFIED) Thanks for the prompt comments, Todd. I'm on vacation today and tomorrow and will provide a response to the questions you raised on Monday. But basically, I think we're on the same page, just explaining our perspectives. - Chris From: Tugwell, Todd SAW [Todd.Tugwell @usace.army.mil] Sent: Thursday, August 21, 2014 10:42 AM To: Chris Roessler; Crumbley, Tyler SAW; Kulz, Eric (eric.kulz @ncdenr.gov) Cc: Jeff Schaffer (jeff.schaffer @ncdenr.gov); Smith, Heather (heather.c.smith @ncdenr.gov); Scott Hunt Subject: RE: Flea Hill meeting minutes (UNCLASSIFIED) Classification: UNCLASSIFIED Caveats: NONE Chris, I have a couple comments on the minutes you prepared: * One of the things we discussed on the site was making sure that the new channel is small and that you try to get a lot of floodplain access since that is really where any uplift will occur, with the possibility of adding some sinuosity to the stream, at least alternating the channel to opposite sides of the constructed floodplain. AGREED. I thought I captured that with this sentence "Michael Baker Engineering, Inc. (Baker) proposes Priority Level II restoration with an emphasis on frequent overbank flooding to increase floodplain contact. Similarly, the width and extent of the restored floodplain will be maximized to the greatest extent feasible to provide greater contact area with overbank flows." I'D LIKE TO ADD that we'll work out the channel dimension and sinuosity in the mitigation plan after further research, including a study of reference reaches. We'll definitely include pools and target alternating the channel to opposite sides of the floodplain. But I think we'll also want to maximize floodplain LENGTH because if we build a smaller channel that increases overbank flooding frequency then braiding is more likely, which could lead to only getting valley length credit for restoration. If we have low sinuosity then there shouldn't be a problem if there is limited braiding because the valley length and restored channel length will be close. * I believe we discussed the idea of including some vernal pools in the floodplain, if possible. AGREED. * Your notes reference reach R2b, and the possibility of getting credit for any channel constructed. I don't recall if we discussed /agreed to that - my recollection was that there would be some type of treatment downstream of the culverts draining the field, not necessarily channels connecting the culverts to the reconstructed stream, since the idea was to try to treat the runoff that was concentrated trough the culverts, not channel it directly to the stream. Please address this in the mitigation plan. I THOUGHT ABOUT THIS AFTER OUR MEETING AND MY REASONING FOLLOWS. Reach R2b is the continuation of a jurisdictional channel (this is the bigger tributary coming from the west) so we won't be able to do a detained wetland cell below the culvert. Instead, we'll construct a floodplain for it (same as the rest of the project streams), which will need to cross at least the 50 feet of buffer before tying into the main channel. All of this points to the idea that this will also be a restored channel and deserving of credit to compensate construction cost. I'm thinking it will only be about 60 feet or so of channel length. I will also address this in the mitigation plan. * Lastly, I wanted the record to note that the IRT felt that the location proposed for the new channel is not what we believe to be the historic condition on the site, and that the preference would have been to try to reconnect the channel to the existing, sinuous drainage to the east of the current ditch, but that due to limitations caused by upstream flooding, the alternative is to dig a new channel through a upland ridge (IRT's interpretation). AGREED. I don't think you need to update the memo if you don't want to, as I will include this email in our file for our records. Thanks, Todd Tugwell Special Projects Manager Wilmington District, US Army Corps of Engineers 11405 Falls of the Neuse Road Wake Forest, NC 27587 Office: 919 - 846 -2564 Mobile: 919 - 710 -0240 - - - -- Original Message---- - From: Chris Roessler [ mailto :Croessler @mbakerintl.com] Sent: Tuesday, August 19, 2014 9:26 AM To: Tugwell, Todd SAW; Crumbley, Tyler SAW; Kulz, Eric (eric.kulz @ncdenr.gov) Cc: Jeff Schaffer (jeff.schaffer @ncdenr.gov); Smith, Heather (heather.c.smith @ncdenr.gov); Scott Hunt Subject: [EXTERNAL] Flea Hill meeting minutes Hi Todd -> Would you please review these minutes and forward them to the other members of the IRT? Thanks for meeting us out there and considering the site. It sounds good to target multiple overbank flows per year. We'd appreciate any comments you might have by the end of August, even if it's just an OK. Thanks a lot, Chris Chris Roessler I Technical Manager I Michael Baker Engineering, Inc. 8000 Regency Parkway, Suite 600 1 Cary, NC 27518 1 919.481.5737 (direct) 1 919.624.0905 (cell) 1919.463.5490 (fax) croessler @mbakerintl.com< mailto :croessler @mbakerintl.com> I www. mbakerintl .com <http: / /www.mbakerintl.com> <http://www.mbakerintl.com/> Cyan_Baker Logo Centered -01 cid: i mage006. png @01CF83F1.2E000390 Classification: UNCLASSIFIED Caveats: NONE Classification: UNCLASSIFIED Caveats: NONE Classification: UNCLASSIFIED Caveats: NONE Proposed Mitigation Features Priority 2 Restoration - - -- Enhancement I 0 Conservation Easement Reach R3 Note: The available property options would allow for an extension of the conservation easement and mitigation channels for the upper reaches of R2 and R3 if the reviewers so desire. Michael Baker Engineering, Inc. 8000 Regency Parkway 0 Suite 600 Cary, North Carolina 27518 Phone: 919.463.5488 1 Fax: 919.463 5490 _ N Reach R1 �t+ • Reach R2 Figure 6A 250 500 Option A Feet Proposed Mitigation Features Flea Hill Site Strickland, Bev From: Kulz, Eric Sent: Wednesday, August 27, 2014 12:31 PM To: Strickland, Bev Subject: FW: Flea Hill meeting minutes (UNCLASSIFIED) Attachments: Flea Hill_ IRTpostContract_ SiteMeetingMinutes _13Aug2014.docx; Flea Hill_ Pro posed MitFeatures _postIRT_13Aug2014.pdf, Fig6A_FleaHill_ Pro posed MitFeatures _OptA_rev2.pdf Another for 14 -0866 - - - -- Original Message---- - From: Tugwell, Todd SAW [ mailto :Todd.Tugwell @usace.army.mil] Sent: Monday, August 25, 2014 2:02 PM To: Chris Roessler; Crumbley, Tyler SAW; Kulz, Eric Cc: Schaffer, Jeff; Smith, Heather; Scott Hunt; Wes Newell (newel I @ backwater. biz); Wilson, Travis W.; Dunn, Maria T. Subject: RE: Flea Hill meeting minutes (UNCLASSIFIED) Classification: UNCLASSIFIED Caveats: NONE Chris, Putting a BMP on an existing channel is definitely frowned on (or worse by EPA), but in this circumstance you would effectively be routing flow through a wetland, rather than putting the wetland on a stream, which is different. I also think that we have some latitude to do this kind of thing for restoration projects since you will have to relocated the larger ditch anyway. NW 27 has some language that talks about conversion of one aquatic resource into another, but in this case you will gain wetland without losing stream, which is the key. With regard to providing credit for the BMP, are you talking about just the BMP at the end of R2b, or all the BMPs that receive flow from the fields (I thought there were more than one)? And what is the difference? We have had other projects where we have given credit for wetland BMPs that were designed to an appropriate standard, but those were a little different in that the BMPs were on non - jurisdictional drainages that were going to be excluded from the project if we did not find a way to provide credit. Also, the stream restorations on those projects were more traditional in the sense that the BMPs were providing their own function on top of what the stream restoration was doing. In this case, I think it was the concept of the BMPs and associated wetland /floodplain function that ultimately convinced the IRT that the project was providing any uplift to begin with, otherwise you are just relocating a ditch. So now to award additional credit for the BMPs themselves seems to be further watering down the amount of functional uplift the project will provide. I think we also agreed to a better credit ratio on the trib coming in from the west, as well, which should help you out with the overall amount of credit to be produced by the project. Based on the above, I don't believe additional credit is warranted in this circumstance, but I would like to hear from other IRT members who were at the site meeting. I've copied Travis Wilson and Maria Dunn with the WRC since I don't think they were included in the original email. (Travis and Maria, please read from beginning. I've attached the referenced minutes as well.) Todd - - - -- Original Message - - - -- From: Chris Roessler [ mailto :Croessler @mbakerintl.com] Sent: Monday, August 25, 2014 10:28 AM To: Tugwell, Todd SAW; Crumbley, Tyler SAW; Kulz, Eric (eric.kulz @ncdenr.gov) Cc: Jeff Schaffer (jeff.schaffer @ncdenr.gov); Smith, Heather (heather.c.smith @ncdenr.gov); Scott Hunt; Wes Newell (newel I @ backwater. biz) Subject: [EXTERNAL] RE: Flea Hill meeting minutes (UNCLASSIFIED) Thanks, Todd. Your description of the location is correct. That's interesting - I didn't realize that you could essentially impound a jurisdictional stream by creating a wetland along it as long as no stream length is lost. I thought low flow must be maintained at all times through a jurisdictional channel (whether it is new or existing). So, in light of your explanation, I agree that a wetland between the culvert and the restored channel is appropriate. Since this particular outlet is a larger system that will require more study, grading, etc., would it be acceptable to propose valley length credit for this wetland only? -Chris - - - -- Original Message---- - From: Tugwell, Todd SAW [ mailto :Todd.Tugwell @usace.army.mil] Sent: Monday, August 25, 2014 10:15 AM To: Chris Roessler; Crumbley, Tyler SAW; Kulz, Eric (eric.kulz @ncdenr.gov) Cc: Jeff Schaffer (jeff.schaffer @ncdenr.gov); Smith, Heather (heather.c.smith @ncdenr.gov); Scott Hunt; Wes Newell (newel I @ backwater. biz) Subject: RE: Flea Hill meeting minutes (UNCLASSIFIED) Classification: UNCLASSIFIED Caveats: NONE Thanks for the explanation, Chris. With regard to Reach R2b, are you saying can't do any wetland treatment /BMP on that channel because it is jurisdictional or because of the size of the watershed? My recollection is that the tributary in question picks up drainage from a field ditch to the east and also from a tributary in the cutover area, and then flows through a culvert directly into the ditch (the tributary to be restored). If you put a wetland bmp between the outfall of the culvert (which is not proposed to be replaced) and the restored channel, you would not be losing any jurisdictional stream, just adding a wetland between the two. I think the IRT emphasized during the meeting that the treatment resulting from the constructed floodplain and wetland BMPs that treat the field runoff is really going to be the primary source of functional uplift with this project, so if you construct another short stream segment, you will be bypassing any treatment. Any thoughts on this? Todd - - - -- Original Message---- - From: Chris Roessler [ mailto :Croessler @mbakerintl.com] Sent: Monday, August 25, 2014 8:40 AM To: Tugwell, Todd SAW; Crumbley, Tyler SAW; Kulz, Eric (eric.kulz @ncdenr.gov) Cc: Jeff Schaffer (jeff.schaffer @ncdenr.gov); Smith, Heather (heather.c.smith @ncdenr.gov); Scott Hunt; Wes Newell (newel I @ backwater. biz) Subject: [EXTERNAL] RE: Flea Hill meeting minutes (UNCLASSIFIED) OK, Todd et al., back from vacation. Please see my responses below your comments starting in CAPS (not for emphasis, just to distinguish my comments from yours;). Please let me know if you're OK with adding this email (including my comments) to the files or would like me to update the minutes. No problem either way. Thank you, Chris Chris Roessler I Technical Manager I Michael Baker Engineering, Inc. 8000 Regency Parkway, Suite 600 1 Cary, NC 27518 1 919.481.5737 (direct) 1 919.624.0905 (cell) 1919.463.5490 (fax) croessler @mbakerintl.com I www.mbakerintl.com - - - -- Original Message---- - From: Chris Roessler Sent: Thursday, August 21, 2014 12:40 PM To: Tugwell, Todd SAW; Crumbley, Tyler SAW; Kulz, Eric (eric.kulz @ncdenr.gov) Cc: Jeff Schaffer (jeff.schaffer @ncdenr.gov); Smith, Heather (heather.c.smith @ncdenr.gov); Scott Hunt Subject: RE: Flea Hill meeting minutes (UNCLASSIFIED) Thanks for the prompt comments, Todd. I'm on vacation today and tomorrow and will provide a response to the questions you raised on Monday. But basically, I think we're on the same page, just explaining our perspectives. - Chris From: Tugwell, Todd SAW [Todd.Tugwell @usace.army.mil] Sent: Thursday, August 21, 2014 10:42 AM To: Chris Roessler; Crumbley, Tyler SAW; Kulz, Eric (eric.kulz @ncdenr.gov) Cc: Jeff Schaffer (jeff.schaffer @ncdenr.gov); Smith, Heather (heather.c.smith @ncdenr.gov); Scott Hunt Subject: RE: Flea Hill meeting minutes (UNCLASSIFIED) Classification: UNCLASSIFIED Caveats: NONE Chris, I have a couple comments on the minutes you prepared: * One of the things we discussed on the site was making sure that the new channel is small and that you try to get a lot of floodplain access since that is really where any uplift will occur, with the possibility of adding some sinuosity to the stream, at least alternating the channel to opposite sides of the constructed floodplain. AGREED. I thought I captured that with this sentence "Michael Baker Engineering, Inc. (Baker) proposes Priority Level II restoration with an emphasis on frequent overbank flooding to increase floodplain contact. Similarly, the width and extent of the restored floodplain will be maximized to the greatest extent feasible to provide greater contact area with overbank flows." I'D LIKE TO ADD that we'll work out the channel dimension and sinuosity in the mitigation plan after further research, including a study of reference reaches. We'll definitely include pools and target alternating the channel to opposite sides of the floodplain. But I think we'll also want to maximize floodplain LENGTH because if we build a smaller channel that increases overbank flooding frequency then braiding is more likely, which could lead to only getting valley length credit for restoration. If we have low sinuosity then there shouldn't be a problem if there is limited braiding because the valley length and restored channel length will be close. * I believe we discussed the idea of including some vernal pools in the floodplain, if possible. AGREED. * Your notes reference reach R2b, and the possibility of getting credit for any channel constructed. I don't recall if we discussed /agreed to that - my recollection was that there would be some type of treatment downstream of the culverts draining the field, not necessarily channels connecting the culverts to the reconstructed stream, since the idea was to try to treat the runoff that was concentrated trough the culverts, not channel it directly to the stream. Please address this in the mitigation plan. I THOUGHT ABOUT THIS AFTER OUR MEETING AND MY REASONING FOLLOWS. Reach R2b is the continuation of a jurisdictional channel (this is the bigger tributary coming from the west) so we won't be able to do a detained wetland cell below the culvert. Instead, we'll construct a floodplain for it (same as the rest of the project streams), which will need to cross at least the 50 feet of buffer before tying into the main channel. All of this points to the idea that this will also be a restored channel and deserving of credit to compensate construction cost. I'm thinking it will only be about 60 feet or so of channel length. I will also address this in the mitigation plan. * Lastly, I wanted the record to note that the IRT felt that the location proposed for the new channel is not what we believe to be the historic condition on the site, and that the preference would have been to try to reconnect the channel to the existing, sinuous drainage to the east of the current ditch, but that due to limitations caused by upstream flooding, the alternative is to dig a new channel through a upland ridge (IRT's interpretation). AGREED. I don't think you need to update the memo if you don't want to, as I will include this email in our file for our records. Thanks, Todd Tugwell Special Projects Manager Wilmington District, US Army Corps of Engineers 11405 Falls of the Neuse Road Wake Forest, NC 27587 Office: 919 - 846 -2564 Mobile: 919 - 710 -0240 - - - -- Original Message---- - From: Chris Roessler [ mailto :Croessler @mbakerintl.com] Sent: Tuesday, August 19, 2014 9:26 AM To: Tugwell, Todd SAW; Crumbley, Tyler SAW; Kulz, Eric (eric.kulz @ncdenr.gov) Cc: Jeff Schaffer (jeff.schaffer @ncdenr.gov); Smith, Heather (heather.c.smith @ncdenr.gov); Scott Hunt Subject: [EXTERNAL] Flea Hill meeting minutes Hi Todd -> Would you please review these minutes and forward them to the other members of the IRT? Thanks for meeting us out there and considering the site. It sounds good to target multiple overbank flows per year. We'd appreciate any comments you might have by the end of August, even if it's just an OK. Thanks a lot, Chris Chris Roessler I Technical Manager I Michael Baker Engineering, Inc. 8000 Regency Parkway, Suite 600 1 Cary, NC 27518 1 919.481.5737 (direct) 1 919.624.0905 (cell) 1919.463.5490 (fax) croessler @mbakerintl.com< mailto :croessler @mbakerintl.com> I www. mbakerintl .com <http: / /www.mbakerintl.com> <http://www.mbakerintl.com/> Cyan_Baker Logo Centered -01 cid: i mage006. png @01CF83F1.2E000390 Classification: UNCLASSIFIED Caveats: NONE Classification: UNCLASSIFIED Caveats: NONE Classification: UNCLASSIFIED Caveats: NONE Proposed Mitigation Features Conservation Easement Priority 2 Restoration Reach R3 1 .. �;J' AV Reach R1 Reach R2 Reach R2b t N /V I Elf -4 MEN=_ 8 .. M1 r, Michael Baker Engineering, inc. 8000 Regency Parkway Post IRT Visit_13August2014 Suite 600 0 250 500 Cary, North Carolina 27518 Phone 919.463.5488 Feet Proposed Mitigation Features : Fax 919.463.5490 Flea Hill Restoration Site