AMES CONSTRUCTION, INC.

REVISE ELECTRICAL PLANS RUN NEW CONDUIT ADD A LOW FLOW RADAR AND WIRE WEIGHT MOUNT THAT RELOCATES AND REPLACES MOUNTS ADD A WIND SENSOR TOWER AND TOWER FOUNDATION REPLACE THE EXISTING SQUARE ALUMINUM LIGHT POLES.

(R-058) REPLACE LIGHT POLES REPLACE COMMUNICATION CABLING RUN NEW CONDUIT TO THE MECHANICAL ADD LOW FLOW RADAR AND WIRE WEIGHT MOUNT ADD A WIND SENSOR TOWER AND TOWER FOUNDATION. (R-060) RECONFIGURE THE PLC/HMI SYSTEM AND REPLACE EXPANSION JOINTS.

(R-57) CHANGE WHERE THE STAIRWELLS ON THE EAST AND WEST SIDE OF THE RIVER ARE ANCHORED TO. (R-65) RECONFIGURE THE PLC/ HMI SYSTEM AND INCLUDE MODBUS COMMUNICATION TO USGS EQUIPMENT ADD A STEEL GRAB BAR ASSEMBLY AND INSTALL A SIX-FOOT SAFETY CHAIN.

REPLACES THE EXISTING SQUARE ALUMINUM LIGHT POLES, REPLACE THE COMMUNICATION CABLE, RUN 1.5-INCH CONDUIT TO THE MECHANICAL SERVICE BRIDGE, ADD LOW FLOW RADAR GAUGE, AND PROCURE AND INSTALL WIND SENSOR TOWER AND FOUNDATION FOR THE TOWER.

DIRECT THE CONTRACTOR TO REMOVE AND REPLACE TURF REINFORCING MAT AND RE-SEED AREAS OF THE EMBANKMENT.

DEFINITIZE RECONSTRUCT EAST BERM

THIS CONTRACT IS MODIFIED TO: USE A HELICAL GEAR (PARALLEL SHAFT REDUCER) INSTEAD OF THE WORM GEAR ORIGINALLY SPECIFIED IN THE CONTRACT FOR THE MACHINERY HOISTING EQUIPMENT.

STRU - CONTROL STRUCTURE/STILLING BASINS

CD - YELLOWSTONE INTAKE FISH PASSAGE - R00020 FINAL VEQ

STRU - CONTROL STRUCTURE/STILLING BASINS

DECREASE THE CONTRACT QUANTITY TO A FINAL QUANTITY FOR CLINS 0031AB STEEL H PILE OVER 50,000 LF AND 0032AB STEEL H PILE OVER 2,000 LF, AND ADD CLIN 0085 STEEL SHEET PILE OVER 24,000 SF.

GLEN ELDER DAM SPILLWAY CHUTE REPLACEMENT, GLEN ELDER UNIT, SOLOMON DIVISION, PICK-SLOAN MISSOURI BASIN PROGRAM, KANSAS

GLEN ELDER DAM SPILLWAY CHUTE REPLACEMENT, GLEN ELDER UNIT, SOLOMON DIVISION, PICK-SLOAN MISSOURI BASIN PROGRAM, KANSAS

CHANGES TO TURF REINFORCEMENT MAT AND J-BULB SIZING

ADD R-064 STOCKPILE GRADING EAST OF THE WILD RICE RIVER, ADD 243 ADDITIONAL CALENDAR DAYS TO THE CONTRACT.

INCLUDE RADIOGRAPHIC TESTING FOR ALL DIAGONAL CONNECTIONS IN SKIN PLATE BRACINGS AS IDENTIFIED IN DRAWINGS SG203 AND SG506. TO MITIGATE THE SCHEDULE IMPACTS- THE FINAL GATE WILL BE CONSTRUCTED DURING THE WINTER MONTHS INSIDE A HEATED ENCLOSURE.

INCREASE THE CONTRACT QUANTITY TO A FINAL QUANTITY FOR CLIN 0028AB STEEL H-PILE (HP 14X73) AND 0029 STEEL SHEETPILE.

REQUIRE THE CONTRACTOR TO RELOCATE THE TEMPORARY CONSTRUCTION FACILITIES FROM THEIR CURRENT LOCATION AT THE RED RIVER STRUCTURE SITE, TO INCLUDE MOVING JOB TRAILERS, REMOVING AND RELOCATING THE ACCESS ROAD AND CONSTRUCTING A NEW LAYDOWN PAD.

1. (R-0012) REVISE THE PIER AND ABUTMENT STAIRS AND INSTALL ACCORDANCE WITH THE REVISED DESIGN CHANGE THE IMPERVIOUS FILL LIFT THICKNESS TO 9 INCHES. 2. (R0015) CHANGE THE WIDTH (EAST-WEST DIRECTION) OF THE (6) DOGGING PLATFORMS.

OF THE NOT TO EXCEED PRICE PRIOR TO SUBMITTING A PRICE PROPOSAL ACCEPTABLE TO THE CONTRACTING OFFICER. THIS CONTRACT MODIFICATION OBLIGATES $450,000.00, WHICH IS 50% OF THE NOT TO EXCEED PRICE OF THIS MODIFICATION.

CHANGE THE SPECIFIED MACHINERY HOISTING EQUIPMENT FROM A WORM GEAR REDUCER TO A HELICAL GEAR AND CONDUCT COMPLIANCE VERIFICATION THROUGH LOAD TESTING BEFORE SHIPPING. THIS MODIFICATION INCLUDES MACHINERY GUARDS ON ALL EXPOSED ROTATING EQUIPMENT.

THE CHANGE ENCOMPASSES DESIGN CHANGES TO THE BRIDGES AND MECHANICAL PLATFORMS SCHEDULE CHANGES TO ALLOW EARLIER PLACEMENT OF EMBANKMENT AND FASTER REVIEWS OF FRACTURE CRITICAL WELDS AND CHANGES TO THE H-PILE TENSION CAPACITY.

WEBSTER DAM SPILLWAY CHUTE REPLACEMENT, WEBSTER UNIT, SOLOMON DIVISION, PICK-SLOAN MISSOURI BASIN PROGRAM, KANSAS

WEBSTER DAM SPILLWAY CHUTE REPLACEMENT, WEBSTER UNIT, SOLOMON DIVISION, PICK-SLOAN MISSOURI BASIN PROGRAM, KANSAS

ADD A PLC MANUAL OVERRIDE OPTION ADJUST THE SAFETY CHAIN HEIGHT REMOVE THE DESIGN IMPACT LOAD FOR THE CONCRETE BARRIER EMBED DOOR ADD COMPRESSIBLE JOINT FILLER TO THE CONCRETE BARRIER.

THIS CONTRACT IS MODIFIED TO: ADD 1) R-049 TRANSFORMER PAD-PLC-HANDRAIL CHANGES 2) R-050 J-BULB SEAL CHANGES 3) R-051 INSTALLATION OF SURVEY MONITORING POINTS 4) R-052 REA TEMPORARY ACCESS CROSSING 5) REA I-29 TIE-IN.

WEBSTER DAM SPILLWAY CHUTE REPLACEMENT, WEBSTER UNIT, SOLOMON DIVISION, PICK-SLOAN MISSOURI BASIN PROGRAM, KANSAS

(1) (R-02) REBAR SIZE CHANGE AND GATE SEAL HEATER (2) (R-04) REVISE TRUNNION GIRDER TRANSVERSE BARS (3) (R-06) COMPENSATE CONTRACTOR FOR REMOVAL OF HOUSE FOUNDATION (4) (R-10) PROVIDE A CREDIT TO THE GOVERNMENT FOR REPLACING THE CQC MANAGER.

REMOVE 10.5 INCHES FROM THE LENGTH OF THE DOGGING PLATFORM. MAKE THE ADJUSTMENTS NECESSARY TO ENSURE THE PLATFORMS NO LONGER INTERFERE WITH THE GATE OPERATION CABLES AS THE GATE RAISES AND LOWERS.

PT BAR FIX.

SAFETY AND DOGGING PLATFORM REVISIONS. ADDITIONAL POST TENSIONING OF THE LONGITUDINAL PT BAR.

(R-51) CHANGE THE SIZE OF THE STAIR PLATFORM CHANNEL. (R-54) ADD WATERSTOPS. (R-55) COMPENSATE THE CONTRACTOR FOR IMPACT COSTS ASSOCIATED WITH THE STOP WORK ORDER RELATED TO WELDS ON THE TAINTER GATE.

GLEN ELDER DAM SPILLWAY CHUTE REPLACEMENT, GLEN ELDER UNIT, SOLOMON DIVISION, PICK-SLOAN MISSOURI BASIN PROGRAM, KANSAS

STRU - CONTROL STRUCTURE/STILLING BASINS

WEBSTER DAM SPILLWAY CHUTE REPLACEMENT, WEBSTER UNIT, SOLOMON DIVISION, PICK-SLOAN MISSOURI BASIN PROGRAM, KANSAS

CD - YELLOWSTONE INTAKE FISH PASSAGE - R00019 DESCOPE AREAS 1 & 2 VEQ

STRU - CONTROL STRUCTURE/STILLING BASINS

MODIFICATION P00017 IS A BILATERAL MODIFICATION REA

CD - YELLOWSTONE INTAKE FISH PASSAGE - R00017 INTERIM VEQ - AREAS 4 & 5 FILL / RIPRAP

CD - YELLOWSTONE INTAKE FISH PASSAGE - 00016 BYPASS CHANNEL REPAIRS

THIS CONTRACT IS MODIFIED TO: REVISE THE MATERIAL USED FOR THE SILL BEAM AND SIDE SEAL AND BUMPER PLATE SECONDARY PLACEMENTS FROM GROUT TO A 7000 PSI CONCRETE MIX AND CHANGES THE SEED MIXES TO MNDOT STANDARD SEED MIXES.

THIS CONTRACT IS MODIFIED TO: PROVIDE 6 LICENSES TO ACCESS THE CONTRACTOR'S CONSTRUCTION MANAGEMENT SOFTWARE AND 6 TABLETS SIMILAR IN SIZE AND CAPABILITIES TO THOSE USED BY AMES CONSTRUCTION PROJECT SITE MANAGEMENT.

THIS CONTRACT IS MODIFIED TO: (1) INSTALL A UTILITY CROSSING (R-46) (2) INSTALL A TAINTER GATE OPENING GAGE (R-46) (3) REMOVE THE BARB WIRE ON THE SECURITY FENCE (R-46) (4) CLARIFY THE TRUNNION PIN STATIONING (R-46) (5) ADD ASPHALT PAVING TO THE CONTROL BUILDING PARKING LOT (R-48) REVISE THE ROOF SILL ELEVATION OF THE GATE WELL (R-48).

CD - YELLOWSTONE INTAKE FISH PASSAGE - 20015 ADDITIONAL SURVEYS FOR EROSION QTYS

THIS MODIFICATION OBLIGATION OBLIGATES ADDITIONAL FUNDING IN ACCORDANCE WITH WBR 1452.232-80 - LIMITATION OF FUNDING

THE CONTRACT IS MODIFIED TO: PROCURE 88 EACH LONGITUDINAL POST TENSIONED 1-3/4 INCH BAR. SUBMIT CERTIFICATIONS DOCUMENTING COMPLIANCE WITH ASTM A722.

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THIS MODIFICATION OBLIGATES ADDITIONAL FUNDING TO COVER WORK UNDER UNILATERAL MODIFICATION NO. P00013

THIS MODIFICATION OBLIGATION OBLIGATES ADDITIONAL FUNDING IN ACCORDANCE WITH WBR 1452.232-80 - LIMITATION OF FUNDING

CD - YELLOWSTONE INTAKE FISH PASSAGE - 00015 ADDITIONAL SURVEYS FOR EROSION QTYS