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Example Projects - Civil Construction

Selected Project List:

Levee Bank Repairs at Colusa Basin Drain - Yolo County, CA

Repairs to Pier 23 at the Army Reserve Command Facilities - Tacoma, WA

Levee and Detention Pond Construction at Tres Rios Phase 1A - Phoeinix, AZ

Napa River/Creek Flood Protection Project - Napa, CA

Dam Safety Improvements at Mud Mountain Dam - Enumclaw , WA

Levee Renovations, Pedestrian Walkways, and Pedestrian Bridges at Smith Island - Everett, WA

Closing of Drug Tunnels Along CA and AZ / Mexican Border - CA and AZ

Los Padres National Forest - Santa Ynez, CA

Levee and Detention Pond Construction at Tres Rios Phase 1B - Phoeinix, AZ

 

Levee Bank Repairs at Colusa Basin Drain - Selena, CA

The project consisted of performing levee bank protection as well as establishment of habitat areas along five miles of the Colusa Basin Drain in Yolo County, California. This project was the first of it's kind, introducing a new and innovative bank-protection design features to meet the needs of both the State of California Department of Water Resources and US Fish and Wildlife Service.

The major design concerns associated with this project were the need to provide bank protection from erosion caused by wavewash and high flood conditions and also to provide a habitat for the Giant Garter Snake. The five-mile section of the levee bank in question has been historically damaged by erosion. A USACE contract to place riprap was halted via legal action by the US Fish and Wildlife Service the previous year. There are two known populations of Giant Garter Snake located to the south and north of the Colusa levee site. Placement of riprap along the bank was considered limiting to snake migration because of exposure to predators. The new design called for placement of the riprap and then installation appropriate snake habitat over the riprap. The habitat, consisting of soil and a seeded plant community, also had to be able to withstand forces due to wave action during high water levels.


 

Repairs to Pier 23 at the Army Reserve Command Facilities - Tacoma, WA

This contract provided renovations to Army Reserve Command Facilities at Pier 23, Tacoma, WA. The project scope was to remove an existing sea wall, pilings, debris and contaminated soils along the shoreline and then install a new sheetpile seawall. Riprap and fish mix were placed on the exterior of the seawall and the interior of the seawall was backfilled with imported soil to extend the shoreline and roadway. Site restoration included landscaping, asphalt and concrete areas.


 
Levee Construction at Tres Rios Phase 1A - Phoeinix, AZ

The scope of services for this project consisted of construction of a 1.4 mile compacted earth fill levee; armoring with 15-inch stone and 2" rock mulch protection; 3' aggregated base course operation and maintenance roads; invert access ramps; 1.3 miles of trapezoidal reinforced concrete channel; reinforced concrete box culverts; grouted stone; a 14 acre foot catch basin; agricultural side drain connections; guide dykes; four-wire right-of-way fence and gates; removal and disposal of debris and incidentals; excavation, compacted fill and disposal of excess or unsuitable/spoil material to mandatory disposal sites.


 

Napa River/Creek Flood Protection Project - Napa, CA

The scope of services for this project consisted of excavation of marsh plain and flood plain terraces in the east overbank of the Napa River from Imola Avenue to New Tulocay Creek (approximately 1,300 linear feet (LF)).  This entailed excavating approximately 206,000 cubic yards (CY) of material.  Existing riverbank stone protection and concrete rubble were removed.  Approximately 2,400 LF of new levee was constructed.  A portion of excavated material (75,000 CY) had elevated levels of chromium and other metals and required special handling during on-site disposal.  The remaining excavated material (131,000 CY) was used to construct levee embankment or be disposed at the Gasser Disposal Area and the Ghisletta Area.  The excavated material below elevation 5 foot NGVD was within the daily tidal range of the Napa River and required special care and methods of excavation.  A portion of the excavated material was old fill and contained construction debris that was screened and separated out.  Final excavated grades were seeded with native grass seed. 

 


 

Dam Safety Improvements at Mud Mountain Dam - Enumclaw , WA

This project was for implementing dam safety improvements along the right bank of Mud Mountain Dam on the White River near Enumclaw, Washington. The project provides dam safety improvements along the right bank of the dam. The work required drilled caisson wall, concrete retaining wall and concrete lined ditch and road work, excavation and grading along a crib wall and drainage pipe work and rock fall slope protection fencing.


 

Levee Renovations, Pedestrian Walkways, and Pedestrian Bridges at Smith Island - Everett, WA

This project entailed  levee renovations, pedestrian walkways, and pedestrian bridges for USACE properties. The construction area is located on Smith Island in the Snohomish River delta, approximately 2 miles northeast of the City of Everett, WA.

The project limits are defined by area contained within 4 levees; the north, south, east and west levees. The east levee (also called the union slough pathway) borders the slough and will receive three breaches to accommodate pedestrian bridges. The east levee will be raised to variable elevations (above mean sea level) per specification/design and will receive an asphalt top course. There will be no work done to the eastern slope of the levee. The western slope will be graded according to the plans and will receive 18 thick loose riprap to an elevation of 9.5. There is a ditch that runs along the east levee that will be filled with appropriate fill material to an elevation of 5. An access ramp will be installed at the intersection of the east and north levee. The north levee will be raised to a uniform elevation of 14.25 and will receive a crushed stone top course. A two foot deep drainage ditch will be installed along the north levee to the limits and lines of the plans.

 


 

Closing of Drug Tunnels Along CA and AZ / Mexican Border - CA and AZ

This project called for furnishing all labor, material, equipment, supervision, transportation, permits, fees, licenses, and all else necessary as required in connection with the construction of the Southern Border Tunnel Filling FY2007 Task Order.  Work included, but was not limited to, site access holes, drill holes, dewatering, and pumping of flowable fill into seven tunnels in various locations in California and Arizona . Work included significant collaboration with Customs and Border Protection officials.


Los Padres National Forest - Santa Ynez, CA

The project scope of work called for road construction in the Los Padres National Forest.   Specifically the work included construction of four river crossings of the Santa Ynez River along the Santa Ynez River Road.  Tasks included water diversion, excavation, and placement of concrete stemwalls, backfilling, placement of concrete roadways, placement of up and downstream grouted riprap and placement of asphalt.  Other activities included screening of materials from on-site borrow sources to obtain required materials, coordination with government wildlife biologists and dam operators regarding in-water field activities, extensive stormwater preparation and maintenance during winter months, disposal of waste materials, traffic control and protection of endangered species.

 


 

Levee and Detention Pond Construction at Tres Rios Phase 1B - Phoeinix, AZ


The scope of services for this project consists of construction of approximately 1.0 mile of modification to the existing Holly Acres Levee with compacted earth fill on 3H:1V landside slope and 2 rock mulch slope protection, including 3 aggregated base course operation and maintenance roads, 2 compacted earth-fill guide dikes, 27 diameter rip rap, gabion mattresses, 3 invert access ramps, an approximate 1.0 mile of trapezoidal reinforced concrete channel, one reinforced concrete box culvert, several agricultural tail water irrigation canal connections, grouted stone, asphalt, four wire right-of-way fence; removal and disposal of debris and incidental. Earthwork consists of excavation, compacted fill and disposal of excess or unsuitable/spoils material to mandatory disposal sites.