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Centennial Trail
…connecting the Centennial Trail to Spring Meadow Lake State Park. Multiple parties were involved in the project with coordination through the City of Helena, Lewis and Clark County, Prickly Pear…
Lovell Infrastructure Improvements
…of Lovell’s water and sewer systems. Water source, water quality, system operations, and water rates were also investigated. The project required extensive coordination with local officials as well as state…
Witch Hazel Village South Concept Plan
…on River Road in Washington County, Oregon. DOWL’s team prepared the preliminary master plan, led early discussions with key agency and departmental staff, completed the infrastructure studies, and developed the…
Chambers Covered Bridge
…to the emergency declaration, DOWL environmental staff worked closely with the permitting agencies and the Federal Highway Administration to expedite environmental clearance and get the necessary permits to dismantle the…
Rock River Water Treatment Plant
…to remove organic constituents as previously configured, and the plant was in violation of the disinfection by-products rule because of high total organic carbon (TOC) levels at the membrane outlet….
Wapato Diversion Dam and Headworks Repairs
…and hundreds of miles of irrigation canals, laterals, and distribution pipelines. Now that design plans are complete, we are working through environmental compliance, including a fisheries assessment and biological assessment….
North Fork Smith River Dam
North Fork Smith River (NFSR) Dam is a 93-foot-high zoned earth fill dam providing recreational opportunities and irrigation water in central Montana. The 70-year-old high-hazard dam was experiencing significant deterioration…
Montana Capitol Campus ADA Improvements
…features including sidewalk cross slope, curb ramps, and cross walks. DOWL provided the state with a geographic information system database and visual heat maps indicating the areas of highest Americans…
Lake Hood Master Plan
The Lake Hood Seaplane Base is the largest and busiest seaplane base in the United States with over 1,100 based aircraft and dozens of busy commercial leases. DOWL completed a…
North 27th Street Stormwater Master plan
…was comprised of mainly commercial and residential development. DOWL completed field evaluations, site survey of key facilities, and developed multiple rain simulation models for both existing conditions and proposed alternatives….