Archive for category: News

The City of Longview is replacing an aging 8 foot by 5 foot box culvert located in the center of a 60-foot wide median. Gibbs & Olson was recently hired to provide the planning, permitting, land surveying, design and construction phase services to replace the box culvert system. The project is approximately 2,600 linear feet and the total drainage basin collected by the existing box culvert is approximately 220 acres. Stormwater enters the box culvert from the contributing drainage area at numerous locations. The stormwater is collected at each intersection along Beech Street and is also collected in small branches consisting of 1 to 3 inlets that are directly connected through the side wall of the culvert with 8 inch concrete pipe. In addition, there are six larger collection system at various locations.

The current box culvert discharges to an existing 42 inch aluminum stormwater trunk line and outfalls into CDID Ditch 1. There is an overflow from one of box culvert which outfalls to CDID Ditch 3. Discharge to this overflow occurs when the water level in the box culvert is greater than one foot in depth.

If you haven’t seen Carol’s presentation on stormwater—it’s an eye opener. Check out this article by Joelle Wilson which summarizes Carol’s presentation on some of the increasing challenges when it comes to addressing stormwater.

In the Loop, July 2017

The Port of Woodland began planning for additional future development in the late 1990’s and into the early 2000’s with the purchase of property along Guild Road. These properties are now referred to as Guild Road Industrial Park. Gibbs & Olson was recently selected to provide conceptual designs and a binding site plan for Guild Road Industrial Park II (Park II) which consists of approximately 16 acres. The conceptual designs and binding site plan will be developed to provide flexibility of buildings ranging in size from 5,000 to 45,000 square feet. With the development of the Park II facilities, the Port of Woodland will be able to provide facilities for light industrial warehousing, transportation and distribution firms.

Gibbs & Olson was recently selected to provide consulting services for the Coweeman Levee Raise. The Coweeman River Levee provides flood protection to a large portion of the City of Kelso and is managed and maintained by Consolidated Diking Improvement District No. 3. To increase the level of flood protection, the levee will be raised in height by up to 3 feet for a length of 1.6 miles between Grade Street and Allen Street. Gibbs & Olson’s team will provide geotechnical evaluation, design, permitting, surveying, right-of-way/easement acquisition assistance, and construction phase services necessary to implement the proposed levee raise. Project components include a gravel maintenance road along the top of the raised levee, access roadways from the toe to the top of the levee and gates to restrict unauthorized vehicle access. To allow safer access for maintenance equipment and levee inspections, the improvements will also include increasing the top width of the levee from 10 feet to 14 to 18 feet.