1.__SOW_Rev2_Final.pdf

Statement of Work (SOW) For Benthic Biological Dive Surveys and Subject Matter Expert Support

Hickam Seawall Emergency Temporary Repair, JBPHH, Hawaii

NAVFAC Pacific, EV24 12 April 2018

Ref: None

Encl: None

1. Introduction and Background

A portion of the seawall along the Hickam Air Force Base shoreline is in need of immediate repair or replacement. The damaged portion of seawall is located between Hickam Beach and The Lanai at Mamala Bay Restaurant (Figure 1). The damaged portion of the seawall measures approximately 150 feet long by 3 feet high and is severely undermined by tidal surge. The seawall is made from concrete, which is spalling and is compromised with exposed rebar. The sidewalk along the interior/landside of the wall has collapsed and the riprap on the exterior/oceanside of the wall is shifting seaward. These dilapidated features, in conjunction with the anticipated shoreline erosion, have created immediate safety and environmental concerns.

However, this section of seawall is not the only portion of Hickam shoreline that is eroding. Adjacent to the Hickam Seawall Project Site, plans are already underway to conduct a study and permanently repair the entire 355 linear feet of seawall that extends from the Hickam Beach to the boat ramp (east of Foster’s Point), as well as replace the two floating docks in Hickam Harbor Marina (Figure 1). As such, the purpose of this scope of work (SOW) is to conduct benthic biological dive surveys to support the Essential Fish Habitat (EFH) and Endangered Species Act (ESA) consultations, in addition to any permits needed for these projects.

Figure 1. Hickam Seawall Project Site. The 150 feet of seawall that is in need of emergency repair is located between Hickam Beach and The Lanai at Mamala Bay

Restaurant.

2. Scope

The scope of this SOW is for the contractor to perform benthic biological dive surveys to characterize the marine natural resources that may be impacted by the emergency temporary repair of the seawall. In addition, this SOW includes benthic biological dive surveys to characterize the marine natural resources that will be impacted by the permanent repair of 355 linear feet of seawall, the boat ramp, as well as the replacement of the floating docks. The reports generated from these surveys will support Naval Facilities Engineering Command, Pacific (NAVFAC PAC) in‐house staff to consult with the appropriate regulatory agencies regarding EFH and endangered and threatened species under Section 7 of the ESA for these projects. The United States Air Force (USAF) is the action proponent.

3. Objectives

The items outlined in Section 2, Scope, are all executed before the emergency temporary Hickam Seawall repair (or repair of the entire seawall, boat ramp, and floating docks) can occur at JBPHH, Oahu, Hawaii. Therefore, the objectives of the SOW are to gather information to comply with Magnuson‐Stevens Fishery Conservation and Management Act, Endangered Species Act, NEPA, Clean Water Act, and Department of the Navy regulation, as well as associated instruction and guidance, such as the OPNAV M‐

5090.1 Environmental Readiness Program Manual so that NAVFAC can consult and obtain concurrence from the appropriate regulatory agencies (e.g., National Marine Fisheries Service [NMFS]).

4. Tasks/Requirements

The Contractor shall perform the following tasks under this SOW:

TASK 1: Benthic Biological Dive Surveys, Hickam Seawall Emergency Temporary Repair

To temporarily repair the Hickam Seawall, the United States Air Force (USAF) will use a large excavator from the shoreline to place a sloping rock rubble mound revetment seaward of the existing seawall. The existing seawall will remain in place. Once the ocean side of the wall is secured and shored with the rock rubble bags, the remainder of the rock will be used to fill in the interior/landside hole. Subsequently, 6 to 12 inches of sand fill will be used to finish filling the interior/landside hole before cement is applied to re‐pour the sidewalk. This temporary repair is anticipated to remain in place for 2 years until the entire seawall can be permanently restored.

The Contractor shall plan and execute transects, 10.76 ft2 (1 m2) quadrats, or another method of data collection that shall be suitable for detecting the presence of seagrass, coral, fish, and other mobile species (i.e., turtles, marine mammals, or mobile invertebrates) in areas that may be impacted by this temporary repair. The purposes of transects is to detect the presence of resources of concern. If seagrass is observed during presence/absence surveys, a survey will be conducted to measure the parameters identified and outlined in the NOAA Fisheries, California Eelgrass Mitigation Policy and Implementing Guidelines

(NOAA 2014). The parameters measured will be spatial distribution of shoots, areal extent of shoots, percentage of vegetative cover, and turion (a type of underground bud that is capable of growing into a complete plant) density. If coral is observed during transects, the Contractor shall record the spatial distribution of coral colonies, coral cover, species, colony sizes, growth form, health, and species density. The Contractor shall strive to capture representative data of the direct and indirect impact areas. The water around the seawall is expected to be turbid. Therefore, photographs of the resources shall be obtained if conditions are suitable. The Contractor shall not plan on surveying substrate under moored vessels. The contractor shall survey all mooring devices and mooring chains that fall within the project footprint.

Optional Subtask 1a. Bathymetric Survey, Roughness and Slope of Survey Area

Most of the project site is anticipated to be present in shallow water. Therefore, if the Contractor deems it possible and necessary, the Contractor shall survey using a methodology that is suitable to identify the substrate type within the areas of concern. At minimum, the Contractor is expected to be able to identify soft, unconsolidated substrate; hard surface with no cover; areas of vegetation cover (seagrass and macroalgae); areas of natural high relief; areas of high relief that are anthropogenic in origin; and coral reef. If the substrate classifications can be further refined, the Contractor is encouraged develop improvements in dialog with the COR and SMEs.

Following completion of all field work under this task and subtask, a letter report shall be prepared documenting the results of the benthic surveys. The report will include the following:

Names of investigators

Methodology employed in the surveys

A description of the current condition of the site(s), including location data (e.g., presence of organisms of interest and turtle resting areas (if present), coordinate location, size of colonies, water depth, etc.)

Quantification of percentage benthic cover categories (coral, seagrass, bivalves, algae, sponge, rock, other)

Presence of fish and other mobile species

Approximate borders containing major/general bottom substrate conditions, such as “unconsolidated sediment”, “artificial substrate”, “historic hard substrate/natural rock.”

Observations of disease, potential biotic or abiotic threats/stressors, invasive species, and overall health.

TASK 2: Benthic Biological Dive Surveys, Hickam Seawall and Floating Docks

An engineering study will be conducted to determine the most appropriate and cost effective solution to permanently repair 355 feet of the Hickam Seawall, including the boat ramp and replace the floating docks.

The Contractor shall plan and execute transects, 10.76 ft2 (1 m2) quadrats, or another method of data collection that shall be suitable for detecting the presence of seagrass, coral, fish, and other mobile species (i.e., turtles, marine mammals, or mobile invertebrates) in areas that may be impacted by this permanent repair. The purposes of transects is to detect the presence of resources of concern. If seagrass is observed during presence/absence surveys, a survey will be conducted to measure the parameters identified and outlined in the NOAA Fisheries, California Eelgrass Mitigation Policy and Implementing Guidelines

(NOAA 2014). The parameters measured will be spatial distribution of shoots, areal extent of shoots, percentage of vegetative cover, and turion (a type of underground bud that is capable of growing into a complete plant) density. If coral is observed during transects, the Contractor shall record the spatial distribution of coral colonies, coral cover, species, colony sizes, growth form, health, and species density.

The Contractor shall strive to capture representative data of the direct and indirect impact areas. The water around the seawall is expected to be turbid. Therefore, photographs of the resources shall be obtained if conditions are suitable. The Contractor shall not plan on surveying substrate under moored vessels. The contractor shall survey all mooring devices and mooring chains that fall within the project footprint.

Optional Subtask 2a. Bathymetric Survey, Roughness and Slope of Survey Area

If the Contractor deems it possible and necessary, the Contractor shall survey using a methodology that is suitable to identify the substrate type within the areas of concern. At minimum, the Contractor is expected to be able to identify soft, unconsolidated substrate; hard surface with no cover; areas of vegetation cover (seagrass and macroalgae); areas of natural high relief; areas of high relief that are anthropogenic in origin; and coral reef. If the substrate classifications can be further refined, the Contractor is encouraged develop improvements in dialog with the COR and SMEs.

Following completion of all field work under this task and subtask, a report shall be prepared documenting the results of the benthic biological surveys. The report will include the following:

Names of investigators

Methodology employed in the surveys

A description of the current condition of the site(s), including location data (e.g., presence of organisms of interest and turtle resting areas (if present), coordinate location, size of colonies, water depth, etc.)

Quantification of percentage benthic cover categories (coral, seagrass, bivalves, algae, sponge, rock, other)

Presence of fish and other mobile species

Observations of indicators of growth, disease, potential biotic or abiotic threats/stressors to survivorship, invasive species, and overall health.

Approximate borders containing major/general bottom substrate conditions, such as “unconsolidated sediment”, “artificial substrate”, “historic hard substrate/natural rock.”

5. Performance Standard

Spec Item

Title Performance Objective Related Information Performance Standard

Task 1 Benthic Biological Dive Surveys, Hickam Seawall Emergency Temporary Repair

The Contractor shall provide an evaluation of the benthic substrate and natural resources within direct and indirect impact areas to ensure compliance with applicable regulations and reporting requirements.

Photographic documentation shall be provided to support consultation dialog with regulators.

Natural resource documentation is established and accurate, as well as provided within required timeframe.

Task 2 Benthic Biological Dive Surveys, Hickam Seawall and Floating Docks

The Contractor shall provide an evaluation of the benthic substrate and natural resources within direct and indirect impact areas to ensure compliance with applicable regulations and reporting requirements.

Photographic documentation shall be provided to support consultation dialog with regulators.

Natural resource documentation is established and accurate, as well as provided within required timeframe.

6. Deliverables

The anticipated work completion date is 30 September 2018. The target project timeline is as follows:

Submittal Task Format # Copies Date

Draft Dive Plan 1 & 2 electronic NA 18 May 2018

Final Dive Plan 1 & 2 electronic NA 25 May 2018

Draft Letter Report Package 1 electronic NA 8 June 2018

Final Letter Report Packages 1 electronic NA 22 June 2018

Draft Report Package 2 electronic NA 6 July 2018

Final Report Packages 2 electronic NA 27 July 2018