Maine Department of Transportation Highway Program

GEOTECHNICAL INFORMATIONAL REPORT Roundabout Construction

Intersection of Route 15, Route 172 and Beech Hill Road Blue Hill, Maine

Prepared by: Karen Gross

Geotechnical Design Engineer

Hancock County Soils Report No. 2012-133

WIN 17258.00 STP-1725(800)X October 16, 2012

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Highway Program

Brad Foley, Program Manager

Scott Bickford & Heath Cowan, Assistant Program Managers Phone: 624-3480 Fax: 624-3481

Memorandum To: Atlee Mousseau From: Karen Gross Date: 2/13/2012/ Subject: Blue Hill Roundabout WIN 17258.00 Bedrock Locations I have completed the review of the Blue Hill sewer plans prepared by Olver Associates in July of 2010 to identify any shallow bedrock that may be present within the new roundabout project limits. These sewer plans show probe locations on the plan sheets, as well as the depth the probes were drilled on the profiles. There were 7 probes drilled within this project limits on Tenney Hill Road, Mines Road, and South Street. No probes were drilled on Beech Hill Road. The following table is a summary of the sewer plan probe information.

Road Location Probe # Offset Approx. Drilling Depth

(ft)

R/NR

Tenney Hill Rd. P-47 Right Shoulder 10 NR P-113 Right Shoulder 16 NR

Mines Rd. P-49 Left Shoulder 11 NR P-50 Left Shoulder 11 NR P-51 Left Shoulder 11 NR

South St. P-111 Right Shoulder 11 NR P-112 Right Shoulder 17 NR

In summary, no refusal due to shallow bedrock is expected on Tenney Hill Road, Mines Road, or South Street. Since there were no probes drilled on Beech Hill Road, the existence of shallow bedrock can not be confirmed. Geology and agricultural soils maps indicate that the existing soils consist of glacial till (as stated in the Resilient Modulus memo dated 2/13/2012), and shallow bedrock is not expected. If any refusal encountered will most probably be small boulders. The Blue Hill sewer plan sheets are attached for your reference, Please let me k now if you have any questions