20170537 Ver 1_Hannah Bridge USACE MY4 Report 11102022_20221110

ID#* 20170537 Version* 1
Select Reviewer:
Erin Davis
Initial Review Completed Date 11/16/2022
Mitigation Project Submittal - 11/10/2022
Is this a Prospectus, Technical Proposal or a New Site?* O Yes O No
Type of Mitigation Project:*
Stream Wetlands Buffer Nutrient Offset
(Select all that apply)
Project Contact Information
Contact Name:* Email Address:*
Jamey McEachran [e-mail]
Project Information
ID#:* 20170531 Version:* 1
Existing ID# Existing Version
Project Type: DMS • Mitigation Bank
Project Name: Neu -Con Stream & Wetland Umbrella
Mitigation Bank - Hannah Bridge
County: Johnston
Document Information
Mitigation Document Type:*
Mitigation Monitoring Report
File Upload: Hannah Bridge USACE MY4 Report 11102022.pdf 50.48MB
Please upload only one PDF of the complete file that needs to be submitted...
Signature
Print Name: * Jamey McEachran
Signature: *

3600 Glenwood Ave, Suite 100
Raleigh, NC 27612
Corporate Headquarters
6575West Loop South, Suite 300
Bellaire, TX 77401
Main: 713.520.5400
November 10, 2022
Sam Dailey
U.S. Army Corps of Engineers
Regulatory Division
3331 Heritage Trade Drive, Suite 105
Wake Forest, NC 27587
Hannah Bridge Year 4Monitoring Report(SAW-2015-01799)
Sam,
Please find attached the Hannah Bridge Year 4MonitoringReport.In Year 4, all20vegetation plots met the
320 stems per acre success criteria. A supplemental planting of 3-gallon container trees occurred on
February 28, 2022 to the west of fixed vegetation plot 16. Approximately 4.7 acres of Chinese privet,
sweetgum, and loblolly pine were controlled in February. Bankfull events were recorded on all three stage
recorders andthe flow gauge documented 115consecutiveflow days in Year 4.The Site has now had at
least four bankfull events in four separate years; therefore, Hannah Bridge has met the success criteria for
bankfull events documented within the seven-year monitoring period. Two ground water wells were added
to provide supplementary hydrology data.Twoof the 15groundwater wells and neitherof the tworeference
groundwater wells met the 12 percent hydroperiod success criteria.The exceptionally low hydroperiods are
due to the drought Johnston County experienced this year, andRES expects the groundwater data to
improveafter a year of normal precipitation.GW1, GW6, GW8, and GW13 remain“at-risk” due to
consecutive years of hydroperiods less than five percent. A light delineation occurred in February to
determine the extent of the at-risk areas. Corrective actions included adding additional wells, moving GW1,
and plugging a ditch by GW6 to improve hydrology. These wells will continue to be monitored. RES agrees
with the IRTs approach to refrain from releasing any more wetland credit until a normal year of precipitation
occurs. As explained in the Monitoring report, RES feels confident that with the preservation credit, the
successful enhancement credit and the other areas that are trending towards success that at a minimum
the amount already released (5.73 WMU credits) is meeting success. However,if low hydroperiods continue
RES will explore other options including modifyingthe instrument to remove the areas from wetland credit
and exploring the potential of adding these areas to the Buffer Mitigation Plan with DWR approval.
Comments from Year 3 Credit Release:
Erin Davis,NCDWR
1.Figure 2 CCPV –Moving forward, please show/callout areas of work completed during monitoring
year and proposed for the upcoming year (e.g. January 2021 supplemental planting area). Also,
please show the approximate extents of any “at-risk” credit areas.
Call outshave been addedtothemap and Figure 3 was added to show “at-risk” credit areasas
determined by the light delineation in February.
res.us

2.What species were used in the January 2021 supplemental planting effort?
Bareroot species that were supplementally planted in January 2021 included: sycamore, river birch,
tulip poplar, overcup oak, willow oak, and swamp chestnut oak.
3.In addition to the three wetland credit areas identified around groundwater wells GW6, 8 and13,
DWR also considers GW1 “at risk”. Have any adaptive management or additional data collection
(e.g. soil samples, supplemental wells) options been considered for the eight wetland credit areas
around the wells not yet meeting the project performance standard?
Yes. Actions are as follows:
1.Supplemental wells 8b and 10b were added early in 2022, and we plan to add
another supplemental well to Wetland 1 this winter to provide more information.
2.A delineation occurred around GW6, 8, and 13 to show at risk credit areas within
wetland 14. We would like an additional year of data for GW 13 due to its recent
installment and the drought that occurred this year.
3.We are considering data points within Wetland 1 and Wetland 10 to better define
areas that are passing according to the data shown by GW10b.
Todd Tugwell, USACE:
4.I have significant concern regarding wetland hydrology on the site. Problems appear to be
scattered across the site and not localized, which makes it difficult to identify a problem area. No
credit should be released until there is substantial improvement in data.
We agree that no WMU credits should be released at this time butdo feel like there is sufficient
evidence to support the success of previously released wetland credits. Justification and
management strategies are further detailed in the report.
5.It appears that some of the gauges that were listed as meeting performance may have dropped
below 12-inches from the soil surface. In particular, gauges 3, 7 and 12 appear to dip close to or
below 12 inches, but it is difficult to determine what period on the graph was considered for
success. On all future monitoring reports please be sure to call out the longest period of
continuous days where the water table is continuously within 12 inches of the soil surface on the
hydrology graphs. This is helpful because it is not possible to verify the length of time that the
water table is continuously within 12 inches of the soil surface on the graphs due to the
compressed appearance of the days on the x-axis of the graph.
Thank you for the note. We have added this,and it will continue to be a feature on hydrographs.
6.Vegetation plot data showed that annual means for black willow dropped from 89 stems in years
1 and 2 to 19 stems in year 3. Additionally, 31 winged elms were present in Year 2, but none were
present in Year 3. Lastly, no plots had any loblolly pine, which is good but surprising. In future
monitoring reports, it would be helpful to get explanations for data anomalies.
Looks like we forgot to include volunteers last year, but they are included in this year’s
monitoring. They correlate to what was reported in 2020 considering mortality rates from
competition. We will include explanations for data anomalies in future reports.
2

RES is requesting a 5% stream credit release(223.300SMUs) for the submission of the Year 4 Monitoring
Report, and an additional 10% stream credit release (446.500 SMUs) for the completion of the bankfull
event performance standard. RES is not requesting the release of any wetland creditsat this time.
Thank you,
Jamey McEachran | Regulatory Manager
Attachments: 1) Updated Bank Credit Release Schedule, 2) Updated Stream Ledger, 3) Updated Wetland
Ledger
3

Date
8/12/2019
10/11/201812/19/201911/20/202011/16/2021
Actual Release
Date
Dec-22
Projected
11/31/202112/31/202212/31/202312/31/202412/31/2025
Release Date
NANANA
Coastal
Credits
NANANA
15%15%10%15%20%10%15%
Releases
Scheduled
Non-Forested Wetland
Johnston30202016/27/201811/10/2022
NA
Credits
Coastal
Wetland
Non-Riparian
Non-Forested
NA
10.73
Riparian
Non-Riverine
Non-Riparian
County:8-Digit HUC:Year Project Instituted:Date Prepared:
NA
2.231.501.001.001.500.501.500.501.00 5.73
Forested Wetland Credits
RiparianRiparian Riverine
Non-Riverine
Forested Wetland Credits
NA
5%5%
15%15%10%10%15%15%10%
10.7310.73
Riparian Riverine
Releases
Scheduled
Current and Future Credit Releases
Cold Cold
WaterWater
Cool Cool
4643
WaterWater
Wilmington District Mitigation Bank Credit Release Schedule
Total Potential Credits
Stream Credits
Warm Stream CreditsWarm
WaterWater
846.90670.00
446.600446.600446.600223.300446.600446.600223.300446.500 2856.70
4,643.00 4,643.00
5%5%
10%
15%15%10%10%10%10%10%
Releases
Scheduled
Hannah BridgeEBX-Nesue ISAW-2015-017992017-0537v1
Signature of Wilmington District Official Approving Credit Release
1, 2
4
3
Credit Classification
2 (Year 0/As-Built)
3 (Year 1 Monitoring)4 (Year 2 Monitoring)5 (Year 3 Monitoring)6 (Year 4 Monitoring)7 (Year 5 Monitoring)8 (Year 6 Monitoring)9 (Year 7 Monitoring)
Potential Credits from As-Built Survey
Potential Credits from Mitigation PlanCredit Release Milestone
Stream Bankfull Standard
Total Credits Release to Date
1 (Bank/Site Establishment)
Project Name:Sponsor Name:USACE Action ID:NCDWQ Action ID:Contingencies (if any): Wetland Credits are on hold until further information is provided 1 - The first credit release milestone
is based on the potential credits stated in the approved mitigation plan.2 - The first credit release shall occur upon establishment of the mitigation bank, which includes the following
criteria: 1) Execution of the MBI or UMBI by the Sponsor and the USACE; 2) Approval of the final Mitigation Plan; 3) Mitigation bank site must be secured; 4) Delivery
of the financial assurances described in the Mitigation Plan; 5) Recordation of the long-term protection mechanism and title opinion acceptable to the USACE; 6) 404 permit
verification for construction of the site, if required.3 - The second credit release is based on the credit totals from the as-built survey, and may differ slightly from the credit
totals stated in the mitigation plan.4 - A 15% reserve of credits to be held back until the bankfull event performance standard has been met.

¸
¸
¸
¸
¸
¸

¸

¸
¸
¸
¸
¸
¸

¸
¸
¸
¸
¸
¸
¸
¸

Legend
Conservation Easement
CCPV Index Sheet
Sources: Esri, HERE, Garmin, USGS, Intermap, INCREMENT P, NRCan, Esri
Japan, METI, Esri China (Hong Kong), Esri Korea, Esri (Thailand), NGCC, ©
OpenStreetMap contributors, and the GIS User Community
Date: 9/28/2020
Figure 1 - Site Location Map
Drawn by: RTM
Hannah Bridge Site
©
Checked by: BPB
05001,000
Johnston County, North Carolina
1 inch = 2,000 feet
Feet

dxm.ksiRdnalteW_egdirBhannaH\\ecnanetniaM\\4YM\\ecnanetniaMgnirotinoM_6\\DXM\\egdirB_hannaH_531001\\stcejorP\\sigtne\\sigseR\\:R :htaP tnemucoD