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HomeMy WebLinkAbout6618; AGUA HEDIONDA STREAMBANK RESTORATION; Sunny Creek Restoration Completion of Construction, Beginning 6-Month Plant Establishment Period (PEP); 2017-01-25\ AECOM 401 West A Street Suite 1200 San Diego, CA 92101 www.aecom.com 619.610.7600 tel 619.610.7601 fax Memorandum PROJECT DESCRIPTION The Sunny Creek Road Stream Bank Restoration Project (Project) (Figure 1) will restore a section of Agua Hedionda Creek by removing existing grouted rip-rap, controlling erosion by reducing incoming storm water velocity, replacing the culvert outfall ramp with ungrouted rip-rap, and replanting the stream banks with native riparian habitat. The Project will build two crib walls (one on either side [upstream and downstream] of the existing culvert) using cut tree logs. To add structural integrity to the stream bank, the crib walls will be built on 3-foot-diameter foundation boulders that will conform to the finish grade. The crib walls will be backfilled with angular rock and soil mix to support riparian plants within each crib. Four oak trees will need to be removed to facilitate the work and the minimum setback from other trees will be 10 feet. New oak trees will be planted at a ratio of 2:1 for each oak tree removed. Existing grouted rip-rap will be removed and replaced with an ungrouted rock-lined ramp and stilling pool reducing flow velocity before it enters Agua Hedionda Creek. Existing grouted rip-rap in the creek will be removed and replaced with two rock-lined step pools. The step pools will be contoured with boulder risers, and pool bottoms will be restored with streambed material appropriate for Agua Hedionda Creek. Revegetation of the stream bank will occur concurrently with construction and will include both native container plants and a native seed mix of persistent coastal San Diego native plants that will support bank stabilization and sediment control. Project activities will result in temporary impacts to 0.001 acre (8 linear feet) and permanent impacts to 0.038 acre (152 linear feet) of streambed waters of the United States and/or state. The Project was issued a Clean Water Act Section 404 permit from the U.S. Army Corps of Engineers (USACE) (File Number SPL-2015-00840-WSZ) using Nationwide Permit 13, Bank Stabilization, and the Project was also issued Clean Water Act Section 401 General Water Quality Certification for Small Habitat Restoration Project from the San Diego Regional Water Quality Control Board To Winston Zack (USACE), Alan Monji (RWQCB) Page 1 CC Sherri Howard (City of Carlsbad), Daniel Zimny (City of Carlsbad) Subject Sunny Creek Streambank Restoration Completion of Construction and Beginning of the 6-Month Plant Establishment Period From Aaron Andrews (Restoration Ecologist, AECOM) Date January 25, 2017 Subject: Sunny Creek Streambank Restoration Construction Completion and Beginning of the 6-Month Plant Establishment Period January 25, 2017 Page 2 (RWQCB) (File Number R9-2015-0184). Project permits and the signed certification of compliance are included in Attachment A. In compliance with the permits issued by the USACE and RWQCB, this memorandum serves as the “As-Built” memorandum and fulfills special conditions 5 and 6 of the USACE 404 Permit File Number SPL-2015-00840-WSZ and condition 6 of the RWQCB Section 401 File number R9-2015-0184. The purpose of this memorandum is to inform the USACE and the RWQCB that construction and plant installation are complete as of December 20, 2016, and to recommend the start of the 6-month plant establishment period. CONSTRUCTION Construction began January 27, 2016, when the Project initiated the temporary repairs required to protect the site during the 2016 winter; temporary repairs were completed January 29, 2016. The team that would build the permanent Project was contracted prior to the start of the permanent stream bank stabilization project, which began on November 4, 2016. Construction completion (December 20, 2016) was marked by the date when the native plant installation was completed and the site was approved by the City of Carlsbad and the Engineer of Record. During both the temporary repairs and the construction of the permanent repairs, AECOM restoration ecologist Aaron Andrews conducted construction compliance monitoring. During construction, no noncompliance incidents were reported (daily observation reports are included as Attachment B). NATIVE CONTAINER PLANT INSTALLATION Native container plant installation began on December 12, 2016, and was completed on December 20, 2016. Tables 1 and 2 provide the plant palette and seed palette, respectively, and list the species and quantities installed. On November 9, 2016, an inspection of the plants was conducted at the nursery by the restoration ecologist to ensure the plants were in proper condition and free of pests and disease. The only species not installed from the planned plant palette was sand bar willow (Salix exigua); substitutions for this species were made in coordination with the restoration ecologist and landscape architect of record as well as with concurrence from the City of Carlsbad. The full complement of western sycamore (Platanus racemosa) and coast live oak (Quercus agrifolia) will be planted in the spring of 2017. Plant species substitutions and increases in recommended plant species quantities are reflected in Table 1. As-built drawings which document changes from the planned design and a Construction Observation Summary Memo, (Balance 2016) are included in Attachment C. Subject: Sunny Creek Streambank Restoration Construction Completion and Beginning of the 6-Month Plant Establishment Period January 25, 2017 Page 3 Table 1 Native Plant Species Installed from Containers and/or Cuttings Scientific Name Common Name Size On-Center Spacing Composition (Approximate) Prescribed Quantity As-Built Quantity Canopy Species Baccharis salicifolia mulefat gallon 5 ft 5% 8 8 Heteromeles arbutifolia toyon gallon 5 ft 10% 16 16 Platanus racemosa1 western sycamore treepot 10 ft 10% 8 0 Quercus agrifolia2 coast live oak treepot 15 ft 20% 8 4 Salix exigua3 narrow-leaf willow cuttings 6 in - 2 ft 10% 12 0 Salix gooddingii black willow cuttings 6 in – 2 ft 5% 8 35 Salix lasiolepis arroyo willow cuttings 6 in – 2 ft 40% 32 64 Understory Species Anemopsis californica yerba mansa gallon 2 ft 10% 15 15 Carex spissa San Diego sedge gallon 3 ft 10% 12 12 Elymus triticoides creeping wild rye gallon 3 ft 10% 14 14 Iva hayesiana San Diego marsh elder gallon 3 ft 5% 10 10 Juncus acutus spp. leopoldii spiny rush gallon 1 ft 5% 14 14 Juncus mexicanus Mexican rush gallon 2 ft 10% 15 15 Mulenburgia rigens deergrass gallon 2 ft 10% 48 48 Rosa californica California rose gallon 3 ft 20% 25 25 Rubus ursinus California blackberry gallon 3 ft 20% 25 25 Cuttings between the Fiber Encapsulated Soil Lifts Salix exigua3 narrow-leaf willow cuttings 240 0 Salix gooddingii black willow cuttings 120 130 Salix lasiolepis arroyo willow cuttings 360 400 1. This plant species was not ready for planting at the time of installation but is currently being grown at the nursery and will be installed in spring 2017. 2. The full number of this plant species was not ready for planting at the time of installation but is currently being grown at the nursery and will be installed in spring 2017. 3. This species was not available and substitutions of other willow species were made. Subject: Sunny Creek Streambank Restoration Construction Completion and Beginning of the 6-Month Plant Establishment Period January 25, 2017 Page 4 Table 2 Native Plant Species Seed Palette Scientific Name Common Name Pure Live Seed Pounds/ Acre Ambrosia psilostachya western ragweed 6 2 Artemisia douglasiana Douglas mugwort 10 2 Artemisia palmeri San Diego sagewort 10 1 Distichlis spicata salt grass 70 2 Elymus triticoides creeping wild rye 80 4 Juncus bufonius common toad rush 60 3 Mulenburgia rigens deergrass 60 1 Total 15 6-MONTH PLANT ESTABLISHMENT PERIOD The 6-month plant establishment period began on December 20, 2016, and is expected to end June 20, 2017. Qualitative Monitoring The restoration ecologist will inspect the site at least once a month during the 6-month plant establishment period. During each qualitative site visit, the restoration ecologist will conduct a site overview to evaluate the following: • Overall site conditions • Overall hydrological functions • General condition of plants, including plant health/vigor and mortality • Native plant recruitment • Potential issues, including hydrology, irrigation problems (too much or too little), invasive nonnative species of concern, erosion, vandalism, and other problems that need to be addressed by the installation or maintenance contractor During the 6-month plant establishment period, the restoration ecologist will be responsible for a visual estimate of plant survival and condition during qualitative visits. At the end of the 6-month plant establishment period, the restoration ecologist will assess the need for potential remedial planting during the fall/winter of 2017/2018. Planting at the end of the 6-month plant establishment period (expected June 20, 2017) to replace dead plants will not occur as timing will not be seasonally appropriate for planting. Remedial recommendations will be provided as necessary and replanting will occur at the seasonally appropriate time. Following each qualitative site visit, the restoration ecologist will send the City of Carlsbad an observation report detailing topics such as replacement of dead or diseased plants, weeding, irrigation scheduling, erosion control needs, trash removal, and pest control. In addition, the restoration ecologist will coordinate with the maintenance contractor for the following: Subject: Sunny Creek Streambank Restoration Construction Completion and Beginning of the 6-Month Plant Establishment Period January 25, 2017 Page 5 • Scheduling upcoming maintenance based on the needs and priorities of the restoration site • Identifying any problems, including erosion and occurrence of invasive nonnative species • Providing support to field maintenance crew in the identification of native and nonnative species • Determining an irrigation schedule (for a given period of time) based on seasonal and annual variation in rainfall, native plant water requirements, and site-specific conditions (e.g., soil condition and slope) Maintenance During the plant establishment period, the maintenance contractor will provide regular maintenance of the restoration site, including trash removal, erosion control within the restoration site, and nonnative plant species treatment. The maintenance contractor will perform maintenance visits and activities in accordance with the goals presented in the restoration plan (Balance Hydrologics, Inc. 2015). The number of maintenance visits will vary depending on the amount of work necessary for the restoration site to meet its success standards on schedule. The contractor will perform maintenance approximately once a month during the first 6 months (i.e., 6-month plant establishment period). Weed control during the plant establishment period will occur on an as-needed basis. Herbicide application will be in accordance with manufacturer labels and agency regulations. At the end of the 6-month plant establishment period, the restoration ecologist will recommend any additional maintenance activities required prior to the acceptance of the 6-month plant establishment period. SITE PHOTOS Site photos taken at the permanent photo points (Figure 1) are included; these photos were taken prior to construction and after plant installation was complete (Figures 2 through 4). These photos will be used in future reporting to compare site conditions at the end of the 6-month plant establishment period and throughout the 2-year maintenance and monitoring program. Additional representative photographs are included in Figures 5 and 6. Figure 1Agua Hedionda Sunny CreekStreambank Restoration Sunny Creek Streambank Restoration Construction Completion and Beginning of the 6-Month Plant Establishment Period Source: Microsoft Bing. Scale: 1:300; 1 inch = 25 feet Path: P:\6033\60335018_FarolCtDrain\900-CAD-GIS\920 GIS\922_Maps\AH_SunnyCreek_restoration.mxd, 1/18/2017, lauren.rizzo 25 0 2512.5 FeetI i!Permanent Photo Point Survey Area Agua Hedionda Creek Impacts Permanent (0.057 Acre) Temporary (0.030 Acre) Subject: Sunny Creek Streambank Restoration Construction Completion and Beginning of the 6-Month Plant Establishment Period January 25, 2017 Page 7 Photo point 1 (southeast corner) facing northwest (pre-construction). Photo point 1 (southeast corner) facing northwest (post-construction). Figure 2 Sunny Creek Streambank Restoration Project Permanent Photo Points Subject: Sunny Creek Streambank Restoration Construction Completion and Beginning of the 6-Month Plant Establishment Period January 25, 2017 Page 8 Photo point 2 (from the north bank across from the site) facing south (pre-construction). Photo point 2 (from the north bank across from the site) facing south (post-construction). Note the supplemental willow cuttings in the foreground. Figure 3 Sunny Creek Streambank Restoration Project Permanent Photo Points Subject: Sunny Creek Streambank Restoration Construction Completion and Beginning of the 6-Month Plant Establishment Period January 25, 2017 Page 9 Photo point 3 (from the north bank across and downstream from the site) facing east (pre-construction). Photo point 3 (from the north bank across and downstream from the site) facing east (post-construction). Note the supplemental willow cuttings along the north bank. Figure 4 Sunny Creek Streambank Restoration Project Permanent Photo Points Subject: Sunny Creek Streambank Restoration Construction Completion and Beginning of the 6-Month Plant Establishment Period January 25, 2017 Page 10 Close-up view of the eastern crib wall system post planting. Photo was taken after several rain events of ≥1 inch. Photo of the fiber enscapulated soil lifts with rack captured in the cuttings on the uppermost lift. Figure 5 Sunny Creek Streambank Restoration Project Representative Photographs Subject: Sunny Creek Streambank Restoration Construction Completion and Beginning of the 6-Month Plant Establishment Period January 25, 2017 Page 11 Close-up view of the fiber enscapulated soil lifts with rack captured in the willow cuttings. Note the leaf buds beginning to form on many of the cuttings. Close-up view of a willow cutting that is starting to bud (typical of many of the cuttings). Figure 6 Sunny Creek Streambank Restoration Project Representative Photographs Subject: Sunny Creek Streambank Restoration Construction Completion and Beginning of the 6-Month Plant Establishment Period January 25, 2017 Page 12 REFERENCES Balance Hydrologics, Inc. October 7, 2015. Revegetation and Plant Establishment Plan and Notes, Sheets 1- 2. Prepared for City of Carlsbad, California. Balance Hydrologics, Inc. January 9, 2016. Construction Observation Summary Memo. Prepared for City of Carlsbad, California. ATTACHMENTS ATTACHMENT A Project Permits USACE - File Number SPL-2015-00840-WSZ and signed certification of compliance RWQCB - File Number R9-2015-0184 ATTACHMENT B Compliance Monitoring Daily Observation Reports ATTACHMENT C As-Built Drawings Construction Observation Summary Memorandum ATTACHMENT A PROJECT PERMITS San Diego Regional Water Quality Control Board January 27, 2016 In reply refer to I attn: EnMUNr> G. BROWN ,JR. GOVERNOR ~ MATTHEW RoDRIQUEZ l."-._~ SF.CRF.l.~RY FOA ~ [NVrRONMENTAL PROTECT!ON Ms. Sherri Howard City of Carlsbad 1635 Faraday Drive Carlsbad,CA 92008 R9-2015-0184:819481 :amonji Subject: Notice of Applicability, Clean Water Act Section 401 General Water Quality Certification for Small Habitat Restoration Projects, (File No. SB09016GN) Ms. Howard: By application dated November 9, 2015, AECOM, a consultant acting on behalf of the City of Carlsbad (Applicant), submitted a Notice of Intent (NO I) for the Applicant to be enrolled under and comply with the Clean Water Act Section 401 General Water Quality Certification for Small Habitat Restoration Projects (General Certification) for the Sunny Creek Road Stream Bank Restoration Project (Project). The NOI is complete and the Applicant is hereby enrolled as a Discharger under the General Certification and subject to the terms and conditions of the General Certification and this Notice of Applicability (NOA). The General Certification can be accessed electronically at: http://www. waterboards.ca.gov/water issues/programs/cwa401/generalorders wb.shtml General Order Enrollment Information This NOA is applicable for the Applicant, Project Location, and Project Facility, Enrollment, and Administrative Information summarized in Tables 1 through 4 below. Table 1 -Disch ---<01-----------------Applicant City of Carlsbad Name of Project Sunny Creek Road Stream Bank Restoration Project 5855 Sunny Creek Ad Project Location Carlsbad, CA San Diego County -------~-HENRY ABA.RBANEL, PH.D .. CHAiR I DAVID GIBSON, EXECUTIVE OFFICER 2375 Northside Drive. Suite 100, San Diego. California 92108-2700~ I www.waterboards.ca.govisandiego 0 RECYCLED PAPF..R City of Carlsbad Sunny Creek Rd Restoration R9-2015-0184 Table 2 -Discharge Location - 2 -January 27, 2016 Discharge Waste Discharge Point Discharge Point Receiving Water Point Description Latitude Longitude Agua Soil, Grouted Hedionda Rock, 33.14273926 -117.27 486522 Agua Hedionda Creek Vegetation Creek Tab I Facil" d Enroll WOlD 9000002925 Project Contact, Title and Phone Sherri Howard, Principal Engineer, 760-602-2756 Authorized Person to Sign and Michelle Fehrensen, AECOM Submit Reports Mailing Address 1635 Faraday Ave Billing Address 1635 Faraday Ave Type of Project Stream Bank Stabilization Fee Category Restoration Projects Fee Amount $200.00 Permitted Dredge Volume 1 09 cubic yards Watershed Carlsbad Hydrologic Unit Receiving Water Agua Hedionda Creek Receiving Water Type Stream Temporary Impacts 0.001 acres, 8 linear feet Permanent Impacts 0.038 acres, 152 linear feet Table 4-Administrative Information This NOA was approved by the San Diego Water Board Staff on: January 27, 2016 This NOA is effective as of: January 27, 2016 PROJECT DESCRIPTION The Applicant's Sunny Creek Road Stream Bank Restoration Project proposes to restore a section of Agua Hedionda Creek by removing existing grouted rip-rap, controlling erosion by reducing incoming storm water flow velocities, replacing the culvert outfall ramp with ungrouted rip-rap, and replanting the stream banks with native riparian habitat. The Project will build one crib wall on the east and two crib walls on the west side of the existing culvert with cut tree logs. To add structural integrity to the stream bank, the crib walls will be built on three foot diameter foundation boulders which will conform to the finished grade. The crib walls will be backfilled with angular rock and soil mix to support riparian plantings at each step. Four oak trees along the stream bank will need to be removed to facilitate the work and the minimum setback from all other trees will be 1 0 feet. The Applicant will plant new oak trees at a 2:1 for each oak tree removed for this Project. See Enclosure 1 and 2 for the Project location. City of Carlsbad Sunny Creek Rd Restoration R9-2015-0184 - 3 -January 27, 2016 Existing grouted rip-rap in the culvert will be removed and replaced with a rock lined (ungrouted) ramp with a stilling pool to reduce the velocity and turbulence of the flow before it enters the Agua Hedionda Creek. Existing grouted rip-rap in the Creek will be removed and replaced with two rock lined step pools. The step pools will be contoured with boulder risers and pool bottoms will be restored with streambed material appropriate for Agua Hedionda Creek. Revegetation of the stream banks will occur concurrently with the construction and will include both native container plantings and broadcast seed mix of persistent coastal San Diego native plants that will support bank stabilization and sediment control. See Enclosure 3 for the conceptual design. Project activities will result in temporary impacts to 0.001 acre (8 linear feet) and permanent impacts 0.038 acre (152 linear feet) of streambed waters of the United State and/or State. The Applicant has also applied for a Clean Water Act section 404 permit coverage from the United States Army Corps of Engineers for the Project (USAGE File No. SPL-2015-000840-WJZ) using Nationwide Permit 13, Bank Stabilization. MITIGATION AND MINIMIZATION MEASURES It is not anticipated that the Project will create temporary or permanent impacts of a size, severity, and/or duration that would have a significant adverse impact on beneficial uses of waters of the State. STATEMENT OF CEQA FINDINGS The City of Carlsbad is the Lead Agency for compliance with the California Environmental Quality Act (CEQA; Pub. Resources Code, § 21000 et seq.) for the Project. The Project conforms to the requirements of CEQA through the Categorical Exemption for Small Habitat Restoration Projects (Section 15333). The San Diego Water Board finds the Project qualifies as a Small Habitat Restoration Project, and that, if implemented as proposed, the conditions in the General Certification and this NOA are adequate to reduce water quality impacts to less than significant levels. ADDITIONAL CONDITIONS 1. The Applicant must notify the San Diego Water Board in writing at least 5 days prior to the start of Project construction. 2. Restoration Plan Implementation. The Applicant must fully and completely implement the Revegetation and Plant Establishment Plan and Notes, Sheets 1-2, prepared by Balance Hydrologies, Inc., October 7, 2015 (and any subsequent versions of the Revegetation and Plant Establishment Plan and Notes). Any significant deviations from, or revisions to the plan must be pre-approved by the San Diego Water Board. City of Carlsbad Sunny Creek Rd Restoration R9-2015-0184 - 4 -January 27, 2016 3. Performance Standards. Restoration required under this Certification shall be considered as achieved once it has met the ecological success performance standards contained in the Revegetation and Plant Establishment Plan to the satisfaction of the San Diego Water Board. 4. Waste Management. Except for a discharge permitted under this Certification, the dumping, deposition, or discharge of trash, rubbish, unset cement or asphalt, concrete, grout, damaged concrete or asphalt, concrete or asphalt spoils, wash water, organic or earthen material, steel, sawdust or other construction debris waste from Project activities directly into waters of the United States and or State, or adjacent to such waters in any manner which may permit its being transported into the waters, is prohibited. 5. Post-Construction Discharges. The Applicant shall not allow post-construction discharges from the Project site to cause or contribute to onsite or off-site erosion or damage to properties or stream habitats. 6. Annual Project Progress Reports. The Applicant must submit annual Project progress reports, for a minimum of three years, describing status of BMP implementation and compliance with all requirements of this NOA to the San Diego Water Board. The Annual Project Progress Reports must contain monitoring information sufficient to demonstrate how the Project is progressing towards accomplishing its objectives and meeting its performance standards. Annual Project Progress Reports must include, at a minimum, the following: a) The names, qualifications, and affiliations of the persons contributing to the report; b) The status, progress, and anticipated schedule for completion of Project construction activities including the installation and operational status of best managemen~ practices Project features for erosion and storm water quality treatment; c) A description of Project construction delays encountered or anticipated that may affect the schedule for construction completion; d) A description of each incident of noncompliance during the annual monitoring period and its cause, the period of the noncompliance including exact dates and times, and if the noncompliance has not been corrected, the anticipated time it is expected to continue; and the steps taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance; City of Carlsbad Sunny Creek Ad Restoration R9-2015-0184 -5 -January 27, 2016 e) Monitoring data interpretations and conclusions as to how the project(s) is progressing towards meeting performance standards and whether the performance standards have been met; and f) Stream photo documentation, including all areas of permanent and temporary impact, prior to and after mitigation site construction. Photo documentation must be conducted in accordance with guidelines posted at http://www.waterboards.ca.gov/sandiego/water issues/programs/401 certific ation/docs/StreamPhotoDocSOP.pdf. In addition, photo documentation must include Geographic Positioning System (GPS) coordinates for each of the photo points referenced. 7. Electronic Document Submittal. The Applicant must submit all reports and information required under this Certification in electronic format via e-mail to SanDiego@waterboards.ca.gov. Documents over 50 megabytes will not be accepted via e-mail and must be placed on a disc and delivered to: California Regional Water Quality Control Board San Diego Region Attn: 401 Certification No. R9-2015-0184:819481 :amonji 2375 Northside Drive, Suite 1 00 San Diego, California 921 08 Each electronic document must be submitted as a single file, in PortableDocumentFormat (PDF) format, and converted to text searchable format using Optical Character Recognition (OCR). All electronic documents must include scanned copies of all signature pages; electronic signatures will not be accepted. Electronic documents submitted to the San Diego Water Board must include the following identification numbers in the header or subject line: Certification No. R9-2015-0184:819481 :amonji. In the subject line of any response, please include the reference number R9-2015-0184:819481 :amonji. For questions or comments regarding this Notice of Applicability or the requirements of the General Certification, please contact Alan Monji by email at Alan.Monji@waterboards.ca.gov or by phone at (619) 521-3968. Respectfully, at-14r·· Alan Monji Environmental Scientist Enclosures: 1. Sunny Creek Streambank Restoration Project -Regional Map, Figure 1 City of Carlsbad Sunny Creek Rd Restoration R9-2015-0184 -6-January 27, 2016 2. Sunny Creek Streambank Restoration Project -Project Location Map, Figure 2 3. Balance Hydrologies Inc., Bank and Stabilization, Agua Hedionda Creek, Coman Property, City of Carlsbad, CA, Sheets 1 and 2, October 7, 2015. cc via email: State Water Resources Control Board Division of Water Quality 401 Water Quality Certification and Wetlands Stateboard40 1 @waterboards.ca.qov U.S. EPA, OWOW, Region 9 75 Hawthorne St. San Francisco, CA 941 05 R9-WTRB-Mailbox@epa.gov Ms. Michelle Fehrensen AECOM Michelle.Fehrensen@aecom.com Mr. Eric Becker San Diego Water Board Eric. Becker@waterboards. ca.qov Mr. Winston Zack U.S. Army Corps of Engineers Winston.S.Zack@usace.army.mil Tech Staff Info & Use File No. R9-2015-0184 WDID 9000002925 Reg. Measure ID 403656 Place ID 819481 PartyiD 7836 Person ID 268327 ATTACHMENT B COMPLIANCE MONITORING DAILY OBSERVATION REPORTS Daily Observation Report Project: Farol Court (Sunny Creek) Report No.: Owner: City of Carlsbad Job No.: Engineer: City of Carlsbad Date: January 25, 2016 Contractor: HRS Project Manager: Michelle Fehrensen - AECOM S M T W TH F S Proj. Biologist: Aaron Andrews - AECOM Day: x Project Condition and Maintenance Activities: Time: 0930 A pre-construction site visit was conducted to look for nesting bird activity, identify laydown areas and work areas. Weather: Sunny Cloudy Overcast Rain Pre-construction activities included placement of steel plates and access improvements including ¾” rock along the access route. x Temp.: to 55 55-70 70-85 85-up x Follow-up Observation: Approved: Yes X No No. Date 0BDescription of Action Distribution: Sherri Howard (City of Carlsbad), Michelle Fehrensen (AECOM) 1) File. 2) Signed: 3) By: Aaron G Andrews Date: 01/25/16 4) Of: AECOM Daily Observation Report Project: Farol Crt (Sunny Creek) temporary repairs Report No.: Owner: City of Carlsbad Job No.: Engineer: Date: January 27, 2016 Contractor: HRS Project Manager: Michelle Fehrensen S M T W TH F S Proj. Biologist: Aaron Andrews - AECOM Day: x Project Condition and Maintenance Activities: Time: 0700 At 0700 a safety tailgate was conducted Work began with the installation of a water diversion. Weather: Sunny Cloudy Overcast Rain The site work boundaries were delineated using construction a frames and caution tape. x Several pieces of old rip rap were removed for ease of stabilizing the slope and the slope work was completed using a small excavator. The slope was protected with filter fabric stapled in place. Large rip rap boulders were keyed in at the toe of slope along with smaller rock. A single layer of rip rap boulders were place from toe to top of slope and voids were filled with smaller rock. Temp.: to 55 55-70 70-85 85-up x Follow-up Observation: Approved: Yes No No. Date 0BDescription of Action Distribution: Sherri Howard (City of Carlsbad), Michelle Fehrensen (AECOM) 1) File. 2) Signed: Aaron G Andrews 3) By: Date: 01/27/16 4) Of: AECOM Slope prior to the start of work. Slope protected with large rip rap. Daily Observation Report Project: Farol Crt (Sunny Creek) Report No.: 1 Owner: City of Carlsbad Job No.: Engineer: Date: November 4, 2016 Contractor: Jeffco Project Manager: Sherri Howard - City S M T W TH F S Proj. Biologist: Aaron Andrews - AECOM Day: x Project Condition and Maintenance Activities: Time: 0730 The site work boundaries were delineated using construction fencing and silt fencing. BMPs are in place. A water diversion system was in place to allow for proper grading of the step pools. Weather: Sunny Cloudy Overcast Rain A pump was in place above the grading area within work limits for the water diversion and a smaller pump was used to maintain proper levels within the grading limits. x Old rip rap was removed and staged in designated areas. Temp.: to 55 55-70 70-85 85-up x Follow-up Observation: Approved: Yes No No. Date 0BDescription of Action Distribution: Sherri Howard (City of Carlsbad) 1) File. 2) Signed: Aaron G Andrews 3) By: Date: 11/04//16 4) Of: AECOM Second step pool partially graded with small pump in place. Ramp down to grading area. Pump in place for water diversion. Area in first step pool yet to be graded. Daily Observation Report Project: Farol Crt (Sunny Creek) Report No.: 2 Owner: City of Carlsbad Job No.: Engineer: Date: November 11, 2016 Contractor: Jeffco Project Manager: Sherri Howard - City S M T W TH F S Proj. Biologist: Aaron Andrews - AECOM Day: x Project Condition and Maintenance Activities: Time: 0930 The site work boundaries were delineated using construction fencing and silt fencing. BMPs are in place. Large rip rap boulders were keyed in along the step pools and voids were filled with smaller rock. Weather: Sunny Cloudy Overcast Rain The step pools and first stage of construction were open to water flow. At this time the water was not flowing as surface flow between step pools. It is expected that sediment will fill in allowing for proper surface flow. x One load of logs had been delivered and a second was on site and ready for offload. Logs were being staged at the Sunny Creek Road intersection staging area. Additional logs are scheduled to be delivered. Temp.: to 55 55-70 70-85 85-up x Follow-up Observation: Approved: Yes No No. Date 0BDescription of Action Distribution: Sherri Howard (City of Carlsbad), 1) File. 2) Signed: Aaron G Andrews 3) By: Date: 11/11/16 4) Of: AECOM Upper step pool filling in with water, not yet flowing via surface flow to second step pool. First load of logs staged at road staging area. Second load of logs delivered, waiting to be unloaded. Daily Observation Report Project: Farol Crt (Sunny Creek) Report No.: 3 Owner: City of Carlsbad Job No.: Engineer: Date: November 18, 2016 Contractor: Jeffco Project Manager: Sherri Howard - City S M T W TH F S Proj. Biologist: Aaron Andrews - AECOM Day: x Project Condition and Maintenance Activities: Time: 0730 The site work boundaries were delineated using construction fencing and silt fencing. BMPs are in place. The first (upstream) crib wall system has been completed. Weather: Sunny Cloudy Overcast Rain The spillway is mostly excavated and after final excavation the large boulders will be keyed in. x Logs are at the Sunny Creek Rd staging area and more will be delivered. Additional boulders were being delivered this morning. Temp.: to 55 55-70 70-85 85-up There is a chance of rain on Monday so the contractor plans on prepping the site for rain on Saturday. x Follow-up Observation: Approved: Yes No No. Date 0BDescription of Action Distribution: Sherri Howard (City of Carlsbad), 1) File. 2) Signed: Aaron G Andrews 3) By: Date: 11/18/16 4) Of: AECOM Upstream crib wall system complete, spillway partially excavated. Looking downslope from the top of the spillway where final excavation will be finalized and large boulders will be installed. Generator staged with plastic and fiber rolls in place for spill protection. Daily Observation Report Project: Farol Crt (Sunny Creek) Report No.: 4 Owner: City of Carlsbad Job No.: Engineer: Date: November 23, 2016 Contractor: Jeffco Project Manager: Sherri Howard - City S M T W TH F S Proj. Biologist: Aaron Andrews - AECOM Day: x Project Condition and Maintenance Activities: Time: 0830 The site work boundaries were delineated using construction fencing and silt fencing. BMPs are in place. The first (upstream) crib wall system has been completed. Weather: Sunny Cloudy Overcast Rain The spillway is completed. x The first of the downstream cribs was being installed while I was on site and the plan is to get one or two cribs built to help stabilize the downstream end if rain occurs over the long weekend. Temp.: to 55 55-70 70-85 85-up There is a chance of rain on Saturday and Sunday so the contractor plans on prepping the site for rain. x Follow-up Observation: Approved: Yes No No. Date 0BDescription of Action Distribution: Sherri Howard (City of Carlsbad), 1) File. 2) Signed: Aaron G Andrews 3) By: Date: 11/23/16 4) Of: AECOM Log being lifted into place on the first downstream crib. Log being set into place in the first downstream crib. First crib prior to drilling the logs. Willow cuttings soaking in preparation for installation. Daily Observation Report Project: Farol Crt (Sunny Creek) Report No.: 5 Owner: City of Carlsbad Job No.: Engineer: Date: December 2, 2016 Contractor: Jeffco Project Manager: Sherri Howard - City S M T W TH F S Proj. Biologist: Aaron Andrews - AECOM Day: x Project Condition and Maintenance Activities: Time: 1200 The site work boundaries were delineated using construction fencing and silt fencing. BMPs are in place. All crib walls and spillway construction have been completed. Weather: Sunny Cloudy Overcast Rain Willow pole cuttings were installed into the crib wall system. x The blanket encapsulated soil at the downstream end of the crib wall was being constructed. Seed was delivered for incorporation into the blanket encapsulated soil. Temp.: to 55 55-70 70-85 85-up No rain is in the forecast for the next week. x Follow-up Observation: Approved: Yes No No. Date 0BDescription of Action Distribution: Sherri Howard (City of Carlsbad), 1) File. 2) Signed: Aaron G Andrews 3) By: Date: 12/02/16 4) Of: AECOM Installing the first lift of blanket encapsulated soil. First lift of blanket encapsulated soil installed with willow cuttings placed on top. Second lift of blanket encapsulated soil being filled. Crib wall system in place with willow pole cuttings installed. Daily Observation Report Project: Farol Crt (Sunny Creek) Report No.: 6 Owner: City of Carlsbad Job No.: Engineer: Date: December 8, 2016 Contractor: Jeffco Project Manager: Sherri Howard - City S M T W TH F S Proj. Biologist: Aaron Andrews - AECOM Day: x Project Condition and Maintenance Activities: Time: 1240 The site work boundaries were delineated using construction fencing and silt fencing. BMPs are in place. All construction has been completed. Willow pole cuttings were installed into the crib wall system. Weather: Sunny Cloudy Overcast Rain Equipment was in the process of being removed from the site. x The laydown areas have all been cleaned up and appear to be in good shape. The next step is irrigation system installation and plant installation. Temp.: to 55 55-70 70-85 85-up The next visit will be to inspect the completed plant installation and begin the plant establishment period. x Several of the large pole cuttings are broken but are planned for replacement. Recommend removal of all site boundary fencing and staking. Follow-up Observation: Approved: Yes No No. Date 0BDescription of Action Distribution: Sherri Howard (City of Carlsbad), Danial Zimny (City of Carlsbad), 1) File. 2) Signed: Aaron G Andrews 3) By: Date: 12/08/16 4) Of: AECOM Installed horizontal willow cuttings in the 3P rd P lift. Upstream crib wall system with cutting in place. Downstream crib wall system with cuttings in place. ATTACHMENT C AS-BUILT DRAWINGS AND CONSTRUCTION OBSERVATIONS - RECORD DRAWINGS-SPECIAL USE PERMIT SUP-15-02··THESE LANDSCAPE RECORD DRAWINGS DOCUMENTTHE PROJECT CONDITIONS AS-CONSTRUCTED ANDFIELD MODIFICATIONS ARE INDICATED IN BLUE. THERECORD DRAWINGS ARE BASED ON RED-LINE PLANMARK-UPS PROVIDED BY THE CITY AND THEIRCONTRACTOR TO SHEETS P-1, P-2, AND I-1, ANDFIELD VERIFIED BY DUDEK IN JANUARY 2017. - RECORD DRAWINGS-SPECIAL USE PERMIT SUP-15-020+200+100+009080THESE LANDSCAPE RECORD DRAWINGS DOCUMENTTHE PROJECT CONDITIONS AS-CONSTRUCTED ANDFIELD MODIFICATIONS ARE INDICATED IN BLUE. THERECORD DRAWINGS ARE BASED ON RED-LINE PLANMARK-UPS PROVIDED BY THE CITY AND THEIRCONTRACTOR TO SHEETS P-1, P-2, AND I-1, ANDFIELD VERIFIED BY DUDEK IN JANUARY 2017. - RECORD DRAWINGS-SPECIAL USE PERMIT SUP-15-02THESE LANDSCAPE RECORD DRAWINGS DOCUMENTTHE PROJECT CONDITIONS AS-CONSTRUCTED ANDFIELD MODIFICATIONS ARE INDICATED IN BLUE. THERECORD DRAWINGS ARE BASED ON RED-LINE PLANMARK-UPS PROVIDED BY THE CITY AND THEIRCONTRACTOR TO SHEETS P-1, P-2, AND I-1, ANDFIELD VERIFIED BY DUDEK IN JANUARY 2017. FIELDMODIFICATIONS DURING CONSTRUCTION DID NOTAFFECT THIS SHEET. - RECORD DRAWINGS-SPECIAL USE PERMIT SUP-15-02THESE LANDSCAPE RECORD DRAWINGS DOCUMENTTHE PROJECT CONDITIONS AS-CONSTRUCTED ANDFIELD MODIFICATIONS ARE INDICATED IN BLUE. THERECORD DRAWINGS ARE BASED ON RED-LINE PLANMARK-UPS PROVIDED BY THE CITY AND THEIRCONTRACTOR TO SHEETS P-1, P-2, AND I-1, ANDFIELD VERIFIED BY DUDEK IN JANUARY 2017. - RECORD DRAWINGS-SPECIAL USE PERMIT SUP-15-02THESE LANDSCAPE RECORD DRAWINGS DOCUMENTTHE PROJECT CONDITIONS AS-CONSTRUCTED ANDFIELD MODIFICATIONS ARE INDICATED IN BLUE. THERECORD DRAWINGS ARE BASED ON RED-LINE PLANMARK-UPS PROVIDED BY THE CITY AND THEIRCONTRACTOR TO SHEETS P-1, P-2, AND I-1, ANDFIELD VERIFIED BY DUDEK IN JANUARY 2017. 216127 Construction Observation Summary Memo.docx 1 BALANCE HYDROLOGICS, Inc. MEMO To: Sherri Howard From: Dana Jepsen Date: January 9, 2016 Subject: Construction Observation Summary Memo Introduction Balance Hydrologics assisted the City of Carlsbad as an observer at the Agua Hedionda Creek Streambank Restoration Project. Our first site visit was in the afternoon of November 2nd, 2016. Our final site visit occurred on the morning of December 3rd, 2016. During our time onsite, we were able to observe the installation and construction of a number of project elements. We have outlined our observations of a number of these elements below. We did not include a discussion of the Fabric Encapsulated Soil because this was a Dudek design element and these have been previously summarized by others. Keyway and Foundation Boulder Placement With the diversion and dewatering activities normalized, boulder placement within the keyway began in earnest on November 4th. Despite the difficulties of removing all of the water from the excavations, the contractor appeared to achieve the placing of these boulders on top of the approved geotextile. Note that this geotextile was not shown in the drawings but, as I understand, it was approved by the City as an acceptable substitute for the bedding material as drawn. This substitution of geotextile for well grading bedding occurred in additional areas as well: below the channel boulders including the boulders that form the drops, below the outfall boulders, and below the stilling pool. The contractor worked diligently and effectively to assure that the top of boulder elevations within the keyway were as indicated in the drawings, and the size of the boulders used in construction appeared to meet the specifications. It was discovered mid-way through keyway boulder placement that the entire keyway would be inundated once the diversion pump was removed. This posed a problem for two reasons. First, the design intent was that base flows within the creek be below the vegetated crib wall and the fabric encapsulated soil (FES). Additionally, the work plan was to remove the diversion pump once the channel and keyway boulders were in place, and to construct the remaining items from outside of the channel. The contractor and the City agreed that the best solution was to raise the elevation of the keyway by adding an additional course of boulders. It was agreed that the elevations for the cribwalls and FES shown on the drawings would be adjusted in the field to fit the revised elevation at the 216127 Construction Observation Summary Memo.docx 2 foundation boulders. This solution had the benefit of decreasing the amount of elevation that needed to be made up later through the labor intensive construction of the vegetated cribwalls. In summary, the construction of the keyway and the foundation for the cribwalls and FES appeared to meet the design intent and specifications even if the elevations were altered in the field. The contractor had sufficient large material available, and placed and compacted the boulders per the specifications. Channel Boulders The contractor worked from downstream to upstream when constructing the channel. Prior to completing the keyway and foundation described above, the boulder placement began within the channel itself. As indicated earlier, the bedding material shown on the drawings was replaced with City approval by a geotextile. We do not have experience in the construction of channel bed forms lined with geotextile, but the contractor appeared to place the material as per its intended use. From my observations and spot measurements, the thickness of the channel material met or exceeded the 4.3’ thickness called for in the drawings. The contractor was able to reserve sufficient large material to construct the two steps shown. The downstream step was constructed in line with the drawings, but a change was made during construction to the elevations at the upper drop. The plug of sandy soil between the diversion pump and the constructed channel could not be entirely removed without flooding the worksite. As opposed to using undersized material to construct the drop, it was decided that the top of the drop would be a foot higher than shown on the drawings. Another change to the design was the addition boulders both upstream and along the side of the channel at the upstream end. The boulders upstream were placed to provide additional stability for the channel and drop structure in anticipation of the sandy soil plug eroding over time and the boulders along the side of the channel were placed to arrest erosion observed after a rain event during construction. In summary, the rock placement to create the channel appeared to meet the design intent and specifications. The only change we note is the placement of additional large material at the upstream end of the project. Outfall and Stilling Pool The rock slope protection at the storm drain outfall and the associated stilling pool were constructed on November 18th, after the completion of the upstream cribwall. Once again, geotextile was used in place of the well graded bedding material shown on the drawings. We observed the contractor placing smaller material in the voids left after the placement of the boulders, but we should note that some of this smaller material was washed out during the storm event that occurred on November 20th and 21st. It is our understanding that the City’s approval of the geotextile is intended to mitigate for loss of some of the smaller bedding material. Although it appears to us that these elements were constructed per plan, we also believe that it is important that these elements be monitored in the future. This monitoring is discussed below in the section on recommendations. 216127 Construction Observation Summary Memo.docx 3 In summary, boulders associated with the stilling pool appear to have been placed per plan and should work to assist in dissipating the energy associated with the flow out of the outfall. In addition, the boulders serve to assist in the containment of cribwall backfill. Vegetated Cribwalls The upstream vegetated cribwall was constructed such that the top header log was set at the elevations indicated on the drawings. While the log diameters are generally smaller than were shown, the contractor did not need to add additional lifts because of the higher starting elevation at the foundation boulders. We worked alongside the city inspector to observe and document that the log connections were done per specifications and that the fill within the crib cells was compacted appropriately. We do not note any deviations or irregularities in the upstream cribwall. There are two items worth noting regarding the downstream cribwall. First, a decision was made jointly by the contractor and the City that installing an additional lift (two layers of logs) would be beneficial to the project from both a performance and cost perspective. We agree that the slope will be more stable because this decision was taken. The second item we noted is that the alignment of the fourth layer of logs at the downstream conform is not ideal. In this case, a decision was taken in the field in consultation with the City that corrective action was not needed and that the FES and plantings allow for sufficient flexibility that the design intent could be achieved without dismantling and re-constructing the cribwall. In summary, the vegetated cribwalls appear to have been constructed in compliance with the design intent and we have reasonable confidence that they will perform as expected. Engineered Fill This project benefited from the almost continuous presence of a soils technician who took responsibility for confirming compliance with the specifications in this area. We do not have anything to add in this regard. Final Thoughts and Recommendations This project was constructed later in the season than anticipated. This late start necessitated that the team move quickly and continuously evaluate the benefits and risks associated with making field adjustments in the anticipation of coming rain events. Given this time pressure, we are impressed with the final product and feel that it should perform well so long as appropriate adaptive management procedures are put in place and followed. In our opinion, the main focus of adaptive management should be on plantings. For the vegetated cribwall and the FES to perform as desired, the plantings called for must not only survive, but thrive. It is not possible to overstate the importance of planting survival both within the engineered reach and at the upstream and downstream transition zones. The second adaptive management item to prepare for is at the outfall. The rock slope protection between the outfall and the stilling pool should be monitored regularly during the rainy season, and the City should be prepared to place material in this area if any becomes dislodged. The 216127 Construction Observation Summary Memo.docx 4 geotextile provides a certain amount of protection against erosion, but will not function unless it is covered with the appropriate sized rock. Per our observations the constructed project was completed in general conformance with the plans and specifications.