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

Exhibit A LL FY 6. DEA will connect the underground pipes to their associated manholes or catch basins. 7. DEA will not climb into manholes or catch basins or perform confined space entry. 8. Aside from where the railroad tracks cross Lenora Street, DEA will not enter within 25 feet of railroad tracks, thus preventing the need for a BNSF flagger. 9. DEA is not responsible for external survey data. Deliverables 1. An electronic AutoCAD Civil 3D map with mapping items as well as a Digital Terrain Model surface and PDF of mapping. Task 300 Geotechnical Investigation Objective Provide geotechnical evaluation to support the Lexington/Wetmore stormwater project. HWA GeoSciences, Inc., is being retained to perform these services. Consultant Services 1. Review available geotechnical information from and in the vicinity of the project. This will include a review of geologic maps, HWA's library of geotechnical information in the area, and data from online databases. 2. Obtain a City of Everett Street Use Permit for drilling in the ROW. This includes developing appropriate traffic control plans for the proposed drilling. 3. Develop and coordinate a field exploration program for drilling of eight (8) geotechnical borings in support of identifying subgrade soil and groundwater conditions that will affect the proposed treatment facility at the proposed casing under the BNSF railroad, at the outfall structure, and at two locations for the new drainage pipes that will affect the proposed improvements. 4. Coordinate with a subcontractor and develop site-specific traffic control plans for each proposed geotechnical exploration. The subcontractor's certified traffic control supervisor will stamp each traffic control plan. Each plan will be reviewed by HWA prior to distribution to the team. Up to two (2) revisions may be required for the ROW use permit application and approval process. 5. Develop a geotechnical exploration plan for the proposed geotechnical investigation and submit it to the City for review and approval. The exploration plan will detail the type, location, and extent of proposed field explorations along with logistics necessary to perform the work such as traffic control plans and staging areas. The work plan will also be used for utility locating clearances and permitting that may be necessary to access the exploration locations. 6. Conduct utility locates for the proposed borings. Visit the site to mark drilling locations with white paint and notify the on-call utility service. An additional site visit will be performed to verify if the proposed locations of the borings are clear of utilities prior to mobilizing the drilling equipment. Additionally, a private locating service will be used to have conductible underground utilities located in the vicinity of the proposed borings. PVC and concrete non- conductible utilities cannot be located with these methods. Lexington Avenue Storm Drainage Improvements Preliminary Design Scope of Services 7