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HomeMy WebLinkAbout20080833 Ver 1_Mitigation Information_20140904Strickland, Bev From: Kulz, Eric Sent: Thursday, September 04, 2014 11:18 AM To: Tugwell, Todd SAW Cc: Strickland, Bev Subject: Fletcher- Meritor - Henderson Co. (DWR #08 -0833) Attachments: Fletcher- Meritor Stream Restoration (4).pdf Todd I am entering monitoring reports into our database and came across something I wanted to point out to you and to get into the record. Please note item No. 4 on page 2 of the attached correspondence. USACE (not sure who) felt that the proposed WL mitigation on the site appeared to be creation rather than restoration. It also recommended not listing those as wetland assets until monitoring supported the presence of wetlands. In glancing through the Yr 1 report, the assets are listed as WL restoration at 1:1 (6.7 acres). Further, no wells were installed prior to issuance of the Yr 1 monitoring report (data collected May 2013) to provide hydrological data. Wells were installed in June of 2013. I don't know if you want to (or can) address this at this point in time; I just wanted to make sure it gets recorded in your files, as I'm sure it will end up being a controversial site. Sorry to cause trouble O Eric W. Kulz Environmental Senior Specialist 401 and Buffer Permitting Unit NCDENR - Division of Water Resources - Water Quality Permitting Section 1617 MSC Raleigh, NC 27699 -1617 Phone: (919) 807 -6476 E -mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. Re: Fletcher - Meritor Site Comments 01-005 Subject: Re: Fletcher - Meritor Site Comments From: Salam Murtada <salam.murtada @ncmail.net> Date: Mon, 23 Jun 2008 16:13:38 -0400 To: Eric Kulz <eric. kulz@ncmail. net> CC: "Deborah A. Daniel" <Deborah.A.Daniel @ncmail.net> Eric, I attached HDR's responses to your comments. Also included are USACE's responses in the same letter for your review as well. Please let me know if you need additional information or have further questions. Thanks! Salam Eric Kulz wrote: Salam; Please see attached. Feel free to contact Tammy or me if you have any questions. Please note that I will be out Monday and tuesday next week. Eric Salam Murtada, PE, CFM Design and Construction Unit Ecosystem Enhancement Program Work Phone: (919) 715 -1972 Fax: (919) 715 -2219 404 -401 Comment Response Memo 6- 23- 08.pdf 1 of 1 6/26/2008 12:29 PM TO: Salam Murtada, PE, CFM — EEP Review Coordinator FROM: John Jamison, Environmental Scientist CC: Debbie Daniel — EEP Project Manager DATE: June 23, 2008 SUBJECT: Responses to 404/401 Comments dated June 13, 2008 Project: Fletcher - Meritor Stream & Wetland Restoration County: Henderson County, NC DWQ Project ID: 08 -0833 lul MEMORANDUM Raleigh, North Carolina DWO "The project proposes riparian zone planting at a density of 436 stems per acre, to achieve a mature survivability of 320 trees per acre. However, in Section 8.0, no success criteria for vegetation is presented. Current guidance for both stream and wetland mitigation list success criteria for stream riparian zone and wetland vegetation as 320 stems per acre in year three, with a final target density of 260 stems per acre in year 5. Please verify that this is the criteria to be employed for this project." RESPONSE: The intention of the vegetation planting density is to meet or exceed the USA CEIDff "Q regulatory criteria. Therefore, we will amend the year five target to 2610 stems per acre and add 320 stems per acre as the year three interim target. 2. "The project states that wetland hydrology will be monitored using three automated wells and three manual wells. However, the report does not present success criteria for hydrology. Please provide the proposed hydrologic success criteria for this project." RESPONSE: The hydrologic success criteria for the wetland component of the project will be consecutive days totaling more than 5% of'the growing season. With the growing season approximated tit 192 days_ for Ienderson County, 5% of the growing season is 10 days and 12.5% is 24 days. Gf'e anticipate the wetland areas will not be inundated for long periods, but that soils will be saturated in the upper 12 inches throughout the winter months and into the spring growing season durhng a year of normal rainfall. "In addition, the report does not describe monitoring hydrology in the reference wetland. Very often, monitoring of the reference wetland can provide valuable data during unusual periods (e.g. drought or very wet periods). Comparison of the mitigation site data to the reference can often be used in conjunction with the success criteria to evaluate whether a wetland mitigation site is developing into the desired wetland type. Please provide the rationale for not monitoring the reference wetland." RESPONSE: We will work with EEP and the landowner to attempt to equip one o f the nearby reference wetland sites with an automated well and access during monitoring events. 3eta:(te °� 1t grit <>� `qreaw tip. Weiarid Res(orait )n t�� 401 JO C'twmmit Baled 6/1 ', 20()8 Pa ;i: 2 k) r 3 3. "The project proposes planting of red maple and sweetgum in the riparian zone. DWQ agrees that these species are a normal component of riparian zones throughout North Carolina. However, both trees tend to be rapid colonizers and volunteers almost always appear on restoration sites during the five -year monitoring period. These species should be counted during monitoring of the vegetation. However, DWQ does to not recommend planting of these species, as planted stock and volunteers can cause the total numbers of these species to exceed 20% of the riparian zone vegetation." RESPONSE: We will remove red maple and sweetgum from the planting palette for the project. We agree that typically these tivo species readily colonize most restoration sites. I,lowever, this project site has been under cultivation,for the better part of 100 yearn, and no significant nttrnbers ol red mcxl)le or sweetgum are present in the lirrrited existing vegetation on -Site. We were proposing to use these two to augment the early- successional vegetation palette. We will use sugarberry (Celtis laevigata) to replace red maple in zones 2 and 3, and will add sycamore (Platanus occidentalis) to the Zone 3 list for planting in the botiomland hardwood area. USACE 4. "There is insufficient documentation in the plan to support restoration of wetlands at this site. There is no site specific information to indicate that the "restoration" areas ever had hydric soils or wetland hydrology. The plan lacks any site specific soil profile descriptions. The Restoration Plan in Section 7 seems to indicate that grading and removal of topsoil will be accomplished to achieve wetland restoration yet there is no indication that the areas were ever filled only farmed. The wetland work appears to be wetland creation rather than restoration. Base on available information, we cannot approve the entire plan and it should be clear that NCEEP would be undertaking the proposed "wetland restoration" at their own risk. We would not support adding the proposed 6.34 acres of wetland to your asset list without monitoring data to demonstrate success." RE.5PONSF,: Soil profiles from the well installation and additional miscellaneous borings are provided as an attachment to this mento. Due to the ongoing drought, our on -site groundwater data collection efwl does not provide enough evidence to clearly exhibit the necessary hydrology However, based on surficial well data from other permanent monitoring sites in the area, as well as discussions with ATRC,S staff irr Henderson County, it appears that surficial groundwater has been lowered by 1.5 to 3 feet since Summer 2007 and the beginning ofthe drought (see attached). The referenced Pisgah Forest USC S well is —15 miles southwest of this site and showed a —2 foot drop in groundwater elevation during the height of the drought (September thru December 2007), as compared to the 23 -year monthly mean. Therefore, we have provided a chart showing the likely c ffect on groundwater at the site due to the ongoing drought, and conservatively estimated it at a --1 foot drop in grouncm,ater elevations on -site. Additionall7,, the soil units mapped h , the NR( -'S Soil Survey for Henderson C "aunty within the restoration area are predominately Kinkora loam, a hvdric soil, with some Codorus loam, a soil with hydric. inclusions of 1•oxawav silt loam and Hatboro loam. Limited amounts ofgrading will be performed in order to eliminate any spoil piles frcrnr the historic ditching and to create limited \Icritor S ream& Wcdand Rcez( orrfiorr M 1 101 t'mttfrr nt:a dItI d 6 13 2008 amounts of microtopoggraph)�. General grading activities for the ii,etlancls will not exceed 6 inches of excavation. 5. "Regarding the proposed channel design, we note that the sloping (8:1) floodplain bench will reduce flood duration (as opposed to a flat bench) and will probably short circuit some of the flood storage and attenuation functions that you are trying to achieve at the site." RESPONSE: The primary goal is to provide adequate floodprone area, as this stream is likely to be in backwater conditions from Cane Creek during most flooding events. In addition, the 8:1 bench helps to alleviate the amount of excavation required, and avoids the need, for an unnaturall), steep slope in order to tie the neiv_floodplain to existing ground elevations. Soil Profile Description IOYR 2/1 * - highlighted borings are within wetland restoration area Boring #1 4 -12 10YR 2/1 2.5Y 5/4 Depth Ranee (in.l Color Mottles Texture 0-3 1 OYR 3/2 2.5Y 5/1 ISilt Loam Sandy Clay 4 -12 10YR 2/1 7.5YR 4/4 Cla Loam 13 -36+ IOYR 2/1 Sand Cla Boring #2 Denth Rnnoe (in 1 Cnlnr Mnttlea T—n.— 0 -3 IOYR 2/1 Silt Loam 4 -12 10YR 2/1 2.5Y 5/4 Silt Loam 13 -14 2.5Y 5/1 2.5Y 5/4 Sandy Clay 15 -28 2.5Y 5/1 5YR 4/4 Sandy Clay 29 -33+ 25Y 511 5Y 6/6 Clayey Sand Boring #3 Denth Ran— (in 1 Cnlnr Mnttlec TPVhrn 0 -12 1 OYR 2/1 Silty Clay 13 -18 10YR 2/1 2.5Y 5/4 Silty Clay Loam 19 -34 1 OYR 4/2 7.5YR 4/4 Clay Sandy Loam 34+ Gley 1 6 /10Y 5YR 4/4 Sandy Loam Boring #4 Denth Ranee (in l Cnlnr Mottles T—fi- 0 -10 IOYR 3/2 Silt Loam 11 -20 10YR 3/1 7.5YR 4/4 Silty Clay 21 -22 IOYR 3/1 7.5YR 4/4 Clay Loam 23 -33 7.5YR 2.5/1 5YR 4/4 Sandy Clay Loan 33+ 2.5Y 511 5Y 6/6 Sandy Loam Boring #5 Denth Range (in 1 Cnl nr Mottles T—fi- 0 -6 1 OYR 4/3 Silt Loam 7 -13 I OYR 3/2 10YR 5/6 Silt Loam 14 -22 1 OYR 6/3 IOYR 5/6 Silt Loam 23 -37+ 25Y 6/1 7.5YR 518 Sandy Loam Boring #6 Depth Range. (in 1 ('nlnr T-- 0 -6 1 OYR 3/2 Silt Loam 7 -10 IOYR 3/2 10YR 4/6 Silt Loam 11 -16 25Y 4/1 IOYR 4/6 Clay Loam 17 -35 2.5Y 6/1 25Y 5/6 Clay 36+ 5Y 6/1 5Y 6/6 Sandy Clay Loam Boring #7 Depth Ranee (in.] Color Mottles Texture 0 -11 2.5Y 5/3 ISilty Clay Loam 12 -34 2.5Y 5/2 10YR 5/6 1 Clay Loam 35+ 2.5Y 5/2 ]OYR 5/6 1 Sandy Clay Boring #8 Depth Ranee (in.] Color Mottles Texture 0 -6 2.5Y 5/3 ISilt Loam 7 -12 2.5Y 5/2 2.5Y 5/6 IClay Loam 13 40+ 2.5Y 6/1 2.5Y 5/6 lClay Boring #9 Depth Ranee (inJ Color Mottles Texture 0 -13 lOYR 5/4 Silt Loam 14-30 2.5Y 6/1 2.5Y 5/6 1 Sandy Clay Loam 31 -40+ 2.5Y 6/1 2.5Y 5/6 ISandy Clay Boring #10 Denth Range (in 1 CA— Mnttl— 0 -17 2.5Y 4/3 ISilt Loam 18 -26 2.5Y 6/1 2.5Y 5/6 Isilty Clay 27 -34 2.5Y 5/1 2.5Y 5/6 1 Sandy Clay Loam 35 -40+ 1 OYR 6/1 7.5YR 5/8 Clay II 0 r 1: d w d 1: m a: 1 �a O " 1 t r Q m M T lil Month Jan Feb Mar Anr Mav Jun .1111 Aim Sen Oct Nnv nPr. Figure 1. USGS Pisgah Forest Site (351709082434101) Average Monthly Depth to Water Level Data for a 22 year period as compared to the 2007 drought year 2007. a 5 W r 10 V c 15 O 20 25 0 s Q- 30 d D 35 Month Sep Oct Nov Dec - +- - Estimated Water Level for Fletcher Site in an "Average Year" --o— Fletcher Monthly Low Real -Time Data for Sept -Dec 2007 Estimated Drought Effect on Water Levels Water Level Difference 10.8 - -4 15.2 . s • -12.4 18.4• 25.6. I -11.8 -a 23.2 11.4 26.8 '. 30.2 40 1 37.0 Figure 2. Conservative Estimate of Water Level for the Fletcher Site in an "Average Year" as Compared to 2007 Drought Water Levels. (based on 50% of the difference between mean and 2007 levels at Pisgah Forest site 15 miles away) References U.S.G.S. Surface -water Daily Data for the Nation. 2008. USGS point 351709082434101. Available URL: htti ): / /waterdata.usgs.t!ov /nwis /dv. Accessed June 17, 2008. Re: [Fwd: Re: Fletcher - Meritor Site Comments] Subject: Re: [Fwd: Re: Fletcher - Meritor Site Comments] From: "tammy.l.hill @ncmail.net" <tammy.l.hill @ncmail.net> Date: Tue, 24 Jun 2008 10:04:30 -0400 (EDT) To: <eric. kulz@ncmai 1. net> 5 % ... always 115 %1'... USACE brought up bigger issues with the soils - that will be an interesting discussion - might be creation instead of restoration IF it meets the 5 % ... always 5 %... At this point, I suppose we can deem it issued "at your own risk" as the Corps said, without approval of any specific credit #s (of course, the credits to be generated aren't in the plans most of the time now anyway) pending future debate by the PACG -TC. Have you decided about the buffer conference? Sounds like JH needs to make arrangements by Thursday, and I'll need to change some plans if I'm going to go. Hope all's well with the 401 class. I'm cruising on paperwork beans here at home T 1 of 1 6/26/2008 12:37 PM