Laserfiche WebLink
�r � <br /> �,°'�"°"�a <br /> June 24, 2006 <br /> Reauest to replace retaininq wall at 3587 North Shore Drive, Orono <br /> There continues to be an urgent need to repair a deteriorating timber retaining <br /> wall which supports the driveway at our home. The existing two-tiered lumber <br /> - wall is 30 years old and the exterior wood has deteriorated causing the timbers <br /> to bow and the driveway above to sink. <br /> Last year, we requested approval from the city of Orono to replace the retaining <br /> wail, and the city requested we hire a structural engineering firm to confirm the <br /> strength of the soil and what the replacement retaining wali should be. We've <br /> abided with that request, and the conclusion is that the soil has the strength and <br /> stability to easily support the driveway as long as the front farade is structurally <br /> sound. (See attached Barr Engineering Company Report.) <br /> We're proposing re-building the wall and replacing the deteriorated wood planks <br /> with field stone boulders. The general contractor and landscape architect have <br /> recommended boulders for several reasons: <br /> 1) The natural stone facade will be more durable and last longer than <br /> timber. � <br /> . 2) The new retaining wall will have an additional tier added (three tiers <br /> versus two), which will be safer. <br /> 3) Each of the three tiers will not exceed 3.5,' which will bring the entire <br /> 10.5' structure into code within the existing city ordinance. The original <br /> retaining wall was built before the current code was created. <br /> There is a smaller timber retaining wall (facing northwest towards the road) . <br /> which would also be replaced with fie(dstone boulders. <br /> The Barr Engineering report has confirmed the feasibility of the use of fieldstone <br /> boulders, and these recommendations will be also be implemented: ' <br /> 1) A free-draining backfill for adequate drainage <br /> 2) Use of compacted backfill material <br /> 3) Inclusion of a geosynthetic covering, between the soil and stone, to <br /> reinforce the backfill soil <br /> 4) A design height and setback, as currently stated, so as not to exceed � <br /> support capacities of the retaining walls. <br /> We have complied with all the city requests and appreciate your continued help <br /> in getting final approval to proceed with the re-building of the wall. <br /> �� �,�" �, , _ <br /> Sincerely, .-.--- . • . , �r : ,� , ' ` � � <br /> `——. .. { `t- t�......'��• _ �l. c,. !.__ /,. t� ,�`,.L!l. -•���.'�.`..� ...�%' ��,4'��.���� i,(.. <br /> ` t ' •1 4 (':�I� . . � �,r J / <br /> .�\w�" t,�__ .....-� �'i , r _.. � ;F <br /> __. �} =� ;` , ,f <br /> � . . <br /> Homeowners at 3587 North Shore.Drive, Steve and Janna Sundby <br />