HDR Engineering Inc. 10/6/2022 - Laserfiche WebLink

Exhibit A LL vertical and horizontal construction or disturbances. An architectural history survey will be conducted for all such locations to record any buildings or structures that are historic in age (i.e., older than 50 years in age) and to document them on historic property inventory (HPI) forms. Consultant Services 1. Assist in developing the proposed Project area of potential effects (APE). 2. Conduct records searches of site forms and previous cultural resources reports on file at DAHP, as well as archival review of other existing documentation that may be useful to determine cultural resources concerns within the APE. The results of the background research will be utilized to formulate a research design for the project and will be incorporated into the technical report. 3. Prior to initiating the field assessment, coordinate regarding the APE and potential sensitive cultural locations with tribes that may have interest in the area. 4. Prior to conducting field assessment, field personnel will secure a temporary access permit from JLL Brokerage for access along the BNSF Railway corridor (if needed) and likewise, if needed, obtain BNSF roadway worker protection training and e-RailSafe background checks. 5. Perform an architectural history reconnaissance-level survey to inventory up to ten (10) historic structures along the project corridor, including at the proposed outfall location. Structures will be photographed and documented on historic property inventory (HPI) forms and evaluated for National Register of Historic Places (NRHP) eligibility at the reconnaissance level, and recommendations of project effects will be provided in the Cultural Resources Assessment Report, as appropriate. 6. Upon acquisition of all necessary rights-of-entry and notifications to property owners by the City, conduct a pedestrian survey of the project alignment to examine exposed ground surfaces within the immediate vicinity of each proposed structure location for cultural resources. 7. Conduct utility locates in advance of the subsurface survey. Mark the subsurface survey areas with white paint and notify the on-call utility service. 8. Perform subsurface shovel test probe (STP) and/or auger probe excavations at exposed ground surfaces where soil disturbance is proposed for conveyance, the treatment facility, and the stormwater outfall. Investigations will be limited to 25 STPs or auger probe excavations and will be used to determine the presence or absence of subsurface cultural deposits. 9. Screen sediment from subsurface excavations through 1/4-inch hardware mesh. The results will be documented on standard forms to include location information, artifact inventory, information on sediment type and color, termination depth, and general observations. Cultural resources identified will be returned to their corresponding STPs. All STPs will be backfilled upon completion of documentation. Use standard GPS to record the locations of subsurface excavations and identified cultural resources. 10. Perform archaeological monitoring for up to eight geotechnical borings performed by subconsultant under Task 300. The monitoring will be performed for the geotechnical borings under the guidance of the Geotechnical Boring IDP, which will be developed in advance of the borings. The Geotechnical Boring IDP will follow Ecology's template IDP and will include a map of the proposed borings. Lexington Avenue Storm Drainage Improvements Preliminary Design Scope of Services 21