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. OULDER WALL NOTES ,� _SCRIPTlON iiS WORK CONSISTS OF CONSTRUCTING BOULQER WALL STRUCTURES AT THE LOCATIONS INDICATEQ ON THE SITE GRADING PLAN, PREPARED BY KEMPER AND ASSOCIATES, INC.� pATED 4/l/14, AND PARTIAILY REPRODUCEO ON SHEEt W5. )ULDER WALLS ARE �'ORMED OF iNTERLOCKING, DRY-STACKED ROCKS WITHOUT REINFORCING STEEL, MORTAR, OR CQNCRETE. )tdSTRUCTI4N REQUIREMENTS )ULDERS: BOULDERS SHALL CONStST OF NATURAL StONE WITH VARYtNG HEIGHTS, AND NOMINAl DEPTFfS RANGING FROM t2 TO 36 INCHES. :NERAL: THE FOLLOWING OEFINITtONS APPLY TO 80UlDER WAL� CONSTRUCTION: (A) BASE ROCK: THE BASE ROCK IS THE LOWERMOST ROCK IN THE BOULDER WALL, AND BEARS DIRECTtY ON THE SOIL SUBGRADE. (B) FACING ROClt: THE FACING ROCKS COMPRISE THE @ULK OF THE BOULDER WALL AND ARf STACKED ABOYE THE BASE ROCK. (C� CAP ROCK: THE CAP ROCK IS THE UPPERMOST ROCK IN THE BOULDER WALL SECTION AND "CAPS" THE BOULDER WALI. lULOER WALL CONSTRUCI'ION: (A) $OULDER WALL FQUNDATtON EXCAVATiON: EXCAVATf A FOUNDATION TRENCH AT LEAST 12 INCHES BELQW THE GRADE AT THE BOTTOM Of THE WALL, RUNNING THE FULL LENGTH OF THE PROPO5ED BOULDER WALL, OR TO THE DEPTH SHOWAi ON THE PLANS. EXCAYATE THf FOUNDATION TO A MINIMUM WIDTH EQUAL TO THE SPECIFIED BASE ROCK WIDTH PLUS 12 INCHES TO INCLUDE THE GRANULAR ROCK DRAINAGf A�GREGATE BEHIND THE 80ULDER WALL. EXERCISE CARE OURING EXCAVATION OF THE BACK CUT. STABILITY OF TEMPORARY CUT Sl.OPES IS TNE RESPONSIBfLITY OF THE CONTRACTOR. (B) BOULbER PLACEMENT: PLACE THE FIRST COURSE OF ROCK (BASE ROCK) ON FIRM, UNYIELDfNG SOIL WITH FULI CONTACT BETWEEN THE ROCK AND THE St18GRADE. EXCAVATE ANY LOOSE, SOFT OR OTHERWISE UNSUITABLE MATERIAL PRESENT AT FOUNOATION GRADE AND REPLACE WITH FOUNDATION FILL. COMPACT 7HE FOUNDATION FILL AS NEEDED. QS TNE BOULDER WALL iS CONSTRUCTED, PLACE THE ROCKS SO TNAT THERE ARE NO CONTiNlJOUS JQINTS iN EITHER , THE YERTICAL OR LATERAL DIRECTION. STQCKPILE A SUFFICIENT NUMBER OF ROCKS TO PROVtDE A GOOD SELECTIpN FQR PLACfMENT. TO OB7A1N A BETTER FIT� PLACE ROCKS WHICH DO NOT MATCH THE SPACES OFFERED BY THE ` PREVIOUS COURSE IN A DIFFERENT LOCATIQN. AYO1D PLACING ROCKS WHICH HAVE SHAPES THAT CREATE VOtDS WITH A LINEAR DtMENS10N GREATER THAN 8 INCHES. EXCEPT IN ISOLATED CASES, PIACE EACH ROCK SO THAT IT BEARS ON AT LfAST TWO ROCKS BELOW IT. LOCATE AT LEAST ONE BEARING POINT A D15TAP10E NO GREATER THAN 6 INCHES FROM THE AVERAGE FACE OF THE BOUEDER WALL. THE ALLOWABLE TOLERANCE FOR 9ASE ROCK WIDTHS IS 3 ' INCHES; HOWEYER. DO NOT PLACE TWO OR MORE CONSECUTIYE BASE ROCKS WITH A WlDTH LESS THAN SPECIFIfD ON THE PLANS. SLOPE THE TOP SURFACE OF EACH ROCK TOWARDS THE BACK OF THE BOULDER WALL AT AN INCLINATION OF AT LEAST (0 PERCENT. THE MINIMUM BOULDER WALL THICKNESS IS BASED ON MINtMUM BASE ROCK WtDTH, AS SPECIFIED ON THE PLANS, AND ALI.OWABLE FACE BATTER, THE REtlUIRED MINIMUM FACE BATTER IS (O DEGREES. SECURELY PLACE FACING ROCKS SQ THAT THE ROCKS ARE UNABLE TO BE MOVED WITH A PRY BAR AFTER THE BOULDER WALL IS COMPLETE. (C) VOIDS: WHERE VOIDS WITH A MIN{MUM DIMENSION OF 6 INCHES OR GREATER EXiST IN TNE FACE OF THE BOULDER WALL, �HINK TNE VOIOS WITH SMALLER ROCK. (1) lf THERE iS NO ROCK CONTACT WITHIN THE BOULDER WALI THICKNESS, CHtNK THE VOID WITH A SMALLER PIECE OF ROCK. (2) CHINKING ROCKS SHOULD NOT PRBVIOE PRIMARY STRUCTURAL SUPPORT FOR THE OVERLYING ROCK. (3) CHiNKING ROCKS SHOULD NOT BE ABIE TO BE MOVED OR REMOVED BY HAND AFTER BOULDER WAIL IS COMPIETE. RESET 104SE CNtNKING ROCKS UNTIL SECURELY PLACED OR GROUTED IN PLACE. DO NOT ALLOW GROUT TQ BE READILY ViS1BLE FROM THE FACE OF THE BOULDER WALL. (D) BOUIQER WALL DRAINA6E: INSTALL DRAINAGE AGGREGATE� CONSISTING OF .3/L►' TO � I��L' CLEAR CRIJSHED A�GREGATE (N� PEA GRAVEL)� BETWEEN THE BOULDER WALL AND THf BACK CUT FACE BEING SUPPORTED. THE DRAINAGE AGGREGATE LAYER SHALL BE TO THE DIMENSIONS SNOWN ON THE PLANS, WITH A MINUMUM DEPTH OF !2 INCHES. PLACE DRAiNA6f AGGREGATE CONCURRENT WITH 80ULDER WALL SO THAT AT NO TtME tS EITHER MORE THAN 12 INCHES HIGHER THAN THE OTHER. SEPARATE THE CRUSHEO ROCK FROM THE BACK OF THE BOUlOERS BY A NON-WOVEN 6EOTEXTILE (MIRAFI 140N OR APPROVED EQUAL). OVERLAP THE NON-WOVEN GEOTEXTILE AT IEAST (8 IAICHES AT ALl SEAMS. THE TOP OF THE DRAINAGE AGGREGATE SHOU�D ALSO BE �CAPPED" WITH THE GEOTEXTILE, AS SHOWN ON THf CROSS-SECTION5. PROPOSED BOULDER RETAINING WALL CALE: 0 1 SHEET: Of: CLIENT: �/ickery �ngineerin�� Consultin.��, L�C EXISTlNG BOULDER WALL REPLACEMENT 1 1 W2 5 BECHLER LANDSCAPE VERIFY LINE ABOVE MEASURES 1 HEREBY CERTiFY THAT THIS PLAN, SPECIFICATIQNS, OR 149-4i Vil�a�eNloods�rive 2605 KELLEY AVENUE, ORONO, MINNESOTA NONE I-INCH. IF IT DOESN'T, ADJUST REPORT WAS PR RED Y ME OR R MY D ECT ��en Prairie,MN 5534T BOULDER WALL NOTES SCALE ACGORDINGLY SUPERYIStON A H A DUL ICE ED FESSIONAL phone: 95Z-�4'65-8272 ENGINEER D R A S HE $T INNESOTA. REV. N0: DATE: DESCRIPTIOId: VEC PROJECT N0: VEC 15-083 � www.vic�ceryen�.com DRAWN BY: RWV ~ i�20�5vKkeryEn�ineerin�¢brConsu�tin�(_(_C REVIEWED BY: VEC RONALD CKE DATE: 4/28/15 DATE: 4/P ReG. No.: 24D65