Riverbend’s project portfolio is concentrated in northern New Mexico and southwestern Colorado. This geographic area covers a wide range of climatic zones and geologic terrain. Each river setting is different, and each client has a specific set of goals and expectations. Riverbend applies its project management experience to tailor a design that is right for that client, and simultaneously uses our science based understanding of fluvial geomorphology to ensure a design that is self-sustaining.
Riverbend has worked with many State and Local entities to accomplish river projects that benefit the public at large. Often this means accommodating a wide range of recreational uses, including boating, fishing, tubing, wading, watching, birding, kayaking, walking, hunting, and interacting with nature in the riverine environment. Often these projects are built within a fixed appropriation, so careful management of the project from concept to construction is very important. In municipal settings these projects have to comply with regulatory floodplain issues, and must be sensitive to public safety along the river’s banks.
>> Click for sample projects done for government entities
Santa Fe River in Santa Fe, NM -- City of Santa Fe
Cross Vane Repair
Riverbend Engineering teamed with another consulting firm on the design and construction oversight of this project for the City of Santa Fe. Recent flood events had torn apart a cross vane structure at a sharp bend in the river, and lateral riverbank erosion had begun. Riverbend’s design solution included armoring the outside bank of the river at the bend, widening the active channel to match the river upstream and downstream, and constructing several grade control structures to limit further channel bed erosion. Riverbend’s design sought to fix the erosion and grade control problems with a natural looking approach, and limited the hardscape to only those areas where it was necessary. The design palette utilized large boulders where needed, concrete grout for the largest grade control, willow and cottonwood transplants, and selected grading to shape the channel’s width and profile. The photo below shows the largest of the grade control structures during the construction process. As the vegetation matures, a mix of rocks and willows along the river bank looks much more natural than a continuous lining of concrete or riprap rock.
Rio Mimbres in Mimbres, NM - NMDGF
River Restoration for Endangered Species
PHASE I: Mimbres Wildlife Area
This mile-long section of the Rio Mimbres has been owned by the New Mexico Department of Game & Fish (NMDGF) for several decades. This reach is managed for conservation of the endangered Chihuahua Chub fish (Gila nigrescens) and the listed Chiricahua leopard frog (Lithobates chiricahuensis)–public access is limited and fishing is not allowed. A forest fire in 2006 in the Black Range had left the upper reaches of the Rio Mimbres watershed devastated. Subsequently there have been several very large flow events that originated on burn-scar areas. Sediment deposition and woody debris accumulations from these fire accentuated runoff events had made habitat conditions that were already poor even worse. The river restoration design for this project paid special attention to the specific habitat needs of both endangered species, and preserved the status of the very healthy existing riparian vegetation.
PHASE II: Mimbres River Preserve, The Nature Conservancy
(more information coming soon)
Riverbend’s services to NMDGF for both these projects included surveying, hydrologic and hydraulic calculations, preliminary and final designs, construction cost estimates, project specifications, and bid documents. In the implementation phase of the project Riverbend provided construction oversight. To mimic natural habitat features where sustainable populations of the Chub are currently found, design relied heavily on woody debris type structures and localized scour pools. Habitat for the frog was created by enhancing natural wetland depressions, and with new off channel ponds that are hydraulically connected to the river.
Santa Fe River near Santa Fe, NM--Santa Fe County
Riverbend has worked with Santa Fe County since 2011. Our first project with the County included design, permitting and construction management of wetland improvements, trail and parking access improvements at Arroyo Hondo Open Space. Between 2012 and 2014 Riverbend worked on the design and construction oversight of three separate river restoration projects in the Santa Fe River. On several of these projects Riverbend was a design sub-consultant to a larger firm, but on the most recent flood damage repair project Riverbend was the prime contractor with the County. Through these multiple projects Riverbend has established a strong working relationship with County staff, even as other involved consultants have come and gone. This relationship and confidence in Riverbend’s technical abilities has led to Riverbend being selected for on-call services with the County, and the subsequent solicitation of cost proposals for engineering services at other locations within the County, see below.
Santa Fe River Trail and Channel Improvements, Phase 4
Riverbend developed revised grade control structure concepts due to difficulties experienced during Phase 3 construction in obtaining adequate quantities of large boulders. Soil cement was ultimately decided upon.
Santa Fe River Restoration at San Ysidro River Park in Agua Fria, NM
Riverbend Engineering was hired as a river expert for this river restoration and stormwater management project. Approximately two years after the initial prototype restoration work was completed along the Santa Fe River between the San Ysidro crossing and Caja del Oro Grant Road, an estimated 100-year storm caused damage to several sections of the newly reconstructed riverbed. To address those areas, Riverbend designed repairs and/or modifications to some of the previous work, plus new improvements including additional grade control structures, bank erosion protection structures, riparian plantings, and additional stormwater rundowns at the river. Following completion of the design, Santa Fe County hired Riverbend directly to oversee construction of the repair work in this section of the river. Due to their river expertise and success on this and other similar projects, Riverbend is now included on the County’s list of pre-qualified consultants.
Santa Fe River at the Randall Davey Audubon Center
Riverbend Engineering provided technical expertise for river restoration design in the upper reaches of the Santa Fe River adjacent to the Audubon Center. The riparian vegetation enhancement project extended from the old Two-Mile Dam site to the Acequia Madre headgate, and included mapping, inventory and designation of surviving riparian habitat, as well as restoration of degraded areas. Riverbend developed the primary designs for both the river restoration work and a flow diversion structure that was included in the final plan set. Riverbend also provided construction phase support.
Arroyo Hondo Open Space
Our first project with the County included design, permitting and construction management of wetland improvements, trail and parking access improvements at Arroyo Hondo Open Space.
Frenchies Field & Siler Road
Uncompahgre River in Ridgway, CO
This project included complete river restoration, addressing decades of in-stream gravel mining. Restoration work included grading of a stable single thread channel, bank stabilization with large woody debris and large boulders, grade control and fish habitat structures, construction of multiple wetlands (open water and shallow depression types), and construction of two whitewater wave features. A new pedestrian trail was designed, extending from an existing Town park all the way north through the restored river section. The restoration work terminates at the north end at an historic railroad bridge. The design had to accommodate a new pedestrian bridge, an existing CDOT bridge, an existing sanitary sewer crossing the river, fish passage throughout, nesting bald eagle habitat, and a very high sediment load from the upstream watershed. Analysis and documentation of changes to the regulatory floodplain were prepared for FEMA map revisions. Aerial photo “Before” shows highly braided river system after in-stream gravel mining in the 1970s through 1990s. Low angle aerial image “After” shows the restored river with open water wetlands in right foreground, depression wetlands (dark brown areas) further downriver, a CDOT bridge and two whitewater wave features in the foreground. Bald eagle habitat is protected on river-right in the downstream (background) part of the project.
San Juan River below Navajo Dam, NM - NMDGF Quality Waters
Riverbend Engineering has been working with the New Mexico Department of Game & Fish on its river restoration efforts as outlined in the Management plan for the San Juan River published in September of 2005. This reach of Quality Trout Waters is below Navajo Dam on the San Juan River in northern New Mexico east of Aztec & Bloomfield, NM. Projects include the Braids, Munoz Flats, Hammond Tract, Simon Canyon, and the Rainbow Lodge Boat Ramp.
IN THE NEWS:
December 2017: Simon Canyon & Rainbow Lodge in the ABQ Journal & Karl Moffatt’s “Outdoors NM” blog.
Winter 2014: Munoz Flats in NM Wildlife
Fall 2014: Hammond Tract in NM Wildlife
March 2014: Munoz Flats and Hammond Tract in Karl Moffatt’s blog
Spring/ Summer 2012: The Braids in NM Wildlife
June 2012: Summary of Projects to date in Karl Moffatt’s “Outdoors NM” blog
December 2011: The Braids in NM Wildlife Press Release
November 2011: The Braids in the Santa Fe New Mexican & Karl Moffat’s “Outdoors NM” blog
December 2007: Phase III – below Cottonwood Campground in the Santa Fe New Mexican & Karl Moffatt’s “Outdoors NM” blog
June 2007: Phase II – below Simon Canyon in the Santa Fe New Mexican & Karl Moffatt’s “Outdoors NM” blog[OTHER NEWS STORIES ABOUT RIVERBEND ENGINEERING & OUR RIVER RESTORATION PROJECTS]
San Juan River in Pagosa Springs, CO
The San Juan River Improvement project included master planning, design, and construction oversight. Improvements included five whitewater waves (with fish passage), two boat ramps, three irrigation diversions, many in-stream fish habitat structures, rehabilitation of two fishing ponds, pedestrian trail extension and connections to public restrooms and parking. The scope of work also includes floodplain analysis of several river sections in preparation for FEMA revisions, design and installation of a shallow groundwater pumping system for irrigation supply, many public meetings and Town Council presentations, grant writing and grant application presentations, and other related consulting.
“The white water river feature behind Town Hall receives a little touch-up work Tuesday morning before crews move down to a spot in the San Juan near Yamaguchi Park where they began building the fifth such structure. Chris Pitcher from Riverbend Engineering designed the features and supervises the work while his uncle, Davey Pitcher from Wolf Creek Ski Area, donates the equipment and labor. …”
“On Tuesday, the Pagosa Springs Town Council heard a recommendation from the town’s Parks and Recreation Department to expand whitewater features in the San Juan river through town from four to nine. …”
“A wonderful transformation has occurred in downtown Pagosa Springs over the last couple of weeks, and it’s time to officially thank the various talented individuals and generous citizens who made our new river improvement project such an apparent success.
Through the efforts of these folks a new whitewater feature, as yet unnamed, has been created, and fish habitat and fisherman’s access have been enhanced.
Riverbend Engineering of Pagosa Springs, represented by Chris Philips, Chris Pitcher and Brad Meyer, did the design work, set up the necessary meetings with the various stakeholders, coordinated the construction, and oversaw two weeks of intensive work. Their professionalism and thoroughness made a complex process as smooth and natural as the flow of snow-melt over the new drop. …”
San Juan River in Kirtland, NM – San Juan County
This project of San Juan County, NM stabilized the banks and improved ripariain habitat at the Lions Park in Kirtland, NM. There were also recreation site improvements including a boat ramp.
Red River in Red River, NM
The Town of Red River, NM has a long history of enjoying the river as it runs right through town. The Town identified 3 Phases of restoration work and has since completed 2/3 of the stretch.
Phase 1, “Young’s Ranch Reach” runs through the east edge of town and was a priority due to heavy damage from flooding in the spring of 2005, which resulted in considerable bank erosion and soil loss. Sediment from the flooding also caused impacts to downstream water quality. Several homes had become threatened by stream bank erosion, and public utilities had been damaged by the flood. In 2006, the Town completed its first river restoration project on the east end of town. A combination of bank stabilization treatments, riparian transplants, and in-stream aquatic habitat structures were installed to repair the existing flood damage, mitigate against future flood damage and water quality impacts, and improve the natural habitat within the project area.
Phase 2, “Red River Westside Fishing Park”, runs through the west edge of Town and was completed on a very fast time-line. Approval of the funding was officially announced on January 10, 2014, and construction was completed before the end of April, allowing time for stocking and plentiful fishing for the Memorial Day holiday. Historic mining, land use and removal of streamside vegetation had degraded this reach of the Red River to the point where it would hold very few fish. The river was wide and shallow, with very little fish habitat. Improvements to the river have included the installation of various rock structures for fish habitat, excavation of some deeper pools in the river, rock reinforcement of some stream banks to reduce erosion, and planting a mix of native willow and shrub species, and cottonwood trees. These plantings will increase shade, reduce erosion of the river’s banks, and attract birds. The New Mexico Department of Game and Fish stocks this reach of the river several times each year.
Phase 3, “Town Reach Restoration Project” runs through the middle of downtown Red River and is funded by the State of New Mexico Environment Department’s River Stewardship Program Grant. This project was completed in October of 2016.
Animas River Penny Lane Dam in Farmington, NM
Riverbend prepared a Feasibility Analysis Report for Low Head Dam Modifications to the Animas Pump Station Diversion on the Animas River at Penny Lane Dam in August of 2013. This low head dam was constructed in 1984 to allow for diversion of water from the Animas River for the public water supply of the City of Farmington. Water taken out of the river is pumped up to Lake Farmington, a raw water storage facility located on a hilltop to the north. Since its construction the dam and diversion facilities had met the project goals for water diversion, but had created the un-intended consequence of preventing fish passage and the un-desirable effect of dangerous hydraulic conditions for boats to float through (resulting in two deaths, in 2005 and 2011). Riverbend conducted a feasibility study which included design alternatives to improve fish passage conditions, and to improve boater safety conditions, as well as building a whitewater wave feature at this location. Final design and environmental documentation were completed in 2015, and construction took place October 2016 – January 2017. Now on the Animas River fish can travel up and downstream, and the new waves provide two options (two degrees of difficulty) for fun and safe boating from the way from Colorado/ New Mexico state line all the way to Kirtland.
15 March 2017: KOB News 4 Coverage of the newly modified Penny Lane Dam/ Whitewater Park in Farmington, NM
Madrid Arroyo in Madrid, NM
Riverbend Engineering worked on a large stormwater management erosion control project in Madrid NM from 2012 to 2015. This project was led by the AML team at ENMRD, and Riverbend was an engineering subcontractor to the prime design/build contractor for this project. Riverbend’s assessment, analysis and design work included watershed level hydrologic modeling, arroyo level hydraulic modeling, gully size erosion control measures and grade control structures, and surface treatments to reduce soil erosion. Solutions to debris flow problems that were occurring during flash flood events required an integrated approach: small scale features higher up in the watershed, and larger structure/conveyance elements down below. The design part of the contract included development of preliminary plans, Agency reviews and comments, public information meetings and solicitation of public comments, negotiations with private landowners to allow construction of new stormwater infrastructure and for temporary construction access, and finished with a detailed plan for construction that was limited to locations where permission to construct could be obtained,. Project planning addressed the timing of construction so as to minimize disruption to commercial activities, and addressed the location of new infrastructure and construction activities to avoid significant archaeological sites. This level of project review went all the way to State Historic Preservation Division understanding the visual impacts of the project.
Lakes near Pagosa Springs, CO
Riverbend Engineering completed bathymetric surveys of four lakes in the Pagosa Springs area for the local water utility authority. The surveys were completed using sonar depth measurements and simultaneous total station measurements of the survey boat’s location. Bathymetric mapping was developed from the survey point data and the resulting 3D ground surface model. Stage-Volume relationships were developed for each reservoir, and were used by the client to verify their storage capacity relative to their deeded water rights.
The 4 lakes are Hatcher Lake (fed by a diversion from Martinez Creek), Lake Pagosa (fed by a diversion from Stevens Creek), Village Lake (just downstream of Lake Pagosa), and Lake Forest (just downstream of Village Lake)–click on the lake names (above) for their topo maps.
Pueblos/ Tribal Nations
Riverbend’s client list includes Tribal Nations in New Mexico and Colorado. These projects have included irrigation diversions, ditch replacements, habitat restoration, and improved fisheries. This group of clients usually has very specific goals in mind. And they appreciate Riverbend’s ability to achieve these goals in a cost effective, and natural looking way. Our designs are consistent with the Native American culture of land stewardship and working with the water.
>> Click for sample projects done for Pueblos/ Tribal Nations
Navajo River near Dulce, NM--Jicarilla Apache Game & Fish
Endangered Fish Habitat & Municipal Water Supply Diversion
This project spanned over 4 years and included a river assessment of ~9 miles for possible fish habitat improvements for species of concern, Roundtail chub (Gila robusta) on the Navajo River above Dulce, NM. That assessment has led so far to ~5 miles of river restoration projects, and reconstruction of the main diversion dam for the potable water supply for the town.
To ensure an adequate diversion of water for the community, the existing dam (piled up river gravel and large rocks) required annual maintenance efforts. The old dam also created a fish passage barrier, impeding the Nation’s efforts at recovery of the Chub. The Nation initially considered a much more expensive concept plan for a concrete structure. In the end the diversion was constructed with large boulders and a series of step-pool weirs extending downstream. Native riparian transplants ensured high function and aesthetics as well as reduced annual maintenance costs. This alternative design provides for natural fish passage and minimizes maintenance time and costs significantly.
Riverbend’s services to the Nation included surveying, hydrologic and hydraulic calculations, preliminary and final designs, construction cost estimates, confirmation of 404 & 401 permit exemptions, project specifications and bid documents. In the implementation phase of the irrigation dam modification project Riverbend was hired as the general contractor, and had construction management personnel onsite each day during construction.
Stollsteimer Creek near Chimney Rock, CO
Channel incision and bank erosion had led to poor water quality conditions and a lack of riparian vegetation. This valley area on the Southern Ute Tribe provides winter habitat for elk and a perennial water source for many mammals. The design solution included grading of point bars and low floodplains where feasible, preventing bank erosion with toe rock and construction of a floodplain bench behind the rock. Riverbend’s geomorphic analysis aided in the design of a low flow system inset within a larger channel & floodplain form capable of passing the 5 year event.
Santa Clara Main Irrigation Ditch on Santa Clara Pueblo, NM
The project worked around culturally sensitive areas and multiple tribal member allotments. Riverbend completed an assessment, survey, preliminary design, and detailed cost estimates for all 11 miles of irrigation ditches at Santa Clara Pueblo. This included two diversion headgate structures on the Rio Grande, and the existing diversion concrete dam & sediment weir system in the canyon where irrigation water is diverted into a pipeline. Problems ranged from poorly functioning siphons, to road crossings, and limited hydraulic capacity to deliver water to certain fields. Riverbend staff worked closely with pueblo staff to catalog problems with the existing irrigation water delivery system. This work enabled the Pueblo request funding from the U.S. Congress. In 2013 the Pueblo was granted Funds for the first phase of ditch replacement work. The priority reach was the Main Ditch, from Santa Creek downstream for approximately 1.5 miles (with 24 separate diversion points). Riverbend prepared final construction drawings, specifications and construction cost estimates, and was retained to provide construction inspection during the implementation phase. The final result of the main ditch replacement project is a functional new concrete lined ditch, which meets the hydraulic requirements of the Pueblo water users.
Santa Ana Dam on Algodones Ditch near Santa Ana Pueblo, NM
Santa Ana Dam had been classified as a high hazard dam, under the USBR’s Safety of Dams (SOD) criteria. The dam breach analysis indicated that there would be significant property damage and a reasonable likelihood that loss of life might occur. This earth fill dam did not meet current criteria for seismic stability, and seepage was evident at the base of the dam whenever water collected in the upstream pool. The Pueblo of Santa Ana elected to take the least costly option: functionally breaching the dam by creating an armored notch in the embankment. Riverbend’s engineers analyzed the hydraulic capacity of the dam, the hydrologic response of the watershed, and the size of the breach notch that would be required to reduce the dame hazard classification. Riverbend’s engineers also performed the dam breach analysis, and developed the flood inundation mapping for the affected areas downstream.
Rio Pueblo de Taos in Taos Pueblo, NM
Irrigation Ditch Headgate Improvements on the Rio de Taos Pueblo, in Taos Pueblo, NM
This project involved replacing of six (6) rock-pile diversion dams (Acequia Madre, Phia-no, C-, South Ash Pile, North Ash Pile, and the Pottery Ditches) with natural looking boulder weirs on the Rio Pueblo, at Taos Pueblo. Historically these diversion dams were constructed by hand placement of rocks, logs, tee-post & fencing, whatever could be accomplished with limited equipment. Prior consultations with local government and federal engineers had the Pueblo to considering expensive gabion or concrete dams. They wanted a more natural alternative, and were referred to Riverbend. The boulder weir approach to diverting irrigation water cost 1/4th to 1/3rd of what a gabion or concrete dam would cost, and looks like a natural system. Riverbend’s services to the Pueblo included surveying, hydrologic and hydraulic calculations, preliminary and final designs, construction cost estimates, 404 & 401 Permit application documents, project specifications, and bid documents. In the implementation phase of the project Riverbend was hired to provide construction oversight. We had construction management personnel onsite each day during construction, helping to direct the placement of large boulders, ensuring that the contractor avoided culturally significant areas, and making sure that the clean water provisions of the federal & state permits were enforced. Materials and workmanship met or exceeded NMDOT standards and specifications. After the project was completed the Tribal Council was very pleased with the project, both for function and beauty.
Private Land Owners
Riverbend’s private sector clients have a stretch of water that they are passionate about. They recognize the value of this asset, and don’t want to see it compromised. Our design process is often very interactive with the client, as we try to achieve their goals and also do what is best for the river. We must earn their trust, and we must help them develop realistic expectations for managing their asset in the future. Riverbend’s high rate of return business from existing & past clients is a testimony to our success in building trusting relationships.
>> Click for sample projects done for private landowners
Rio Hondo near Arroyo Seco, NM – Valdez Ranch
Riparian zone grazing has led to unstable river banks and an over-wide channel bottom. Fish habitat potential was very limited. The landowner had already stopped grazing the riparian area, but the river had not regained much fish holding capacity. The design solution involved rock and wood structure in the river, shaping of pools and side bars, willow transplants, and maintaining as much existing vegetation as possible.
Pecos River near Pecos, NM – Kooi
Historic degradation and widening of the river had created shallow flow conditions and limited aquatic habitat for salmonids. Riverbend’s geomorphic analysis documented relatively recent channel bed lowering and straightening of the channel plan form as a result of the incised conditions. The design solution included narrowing the low flow channel of the river, excavating deep pools, adding rock structures and woody debris structures for fish habitat, grading of alternating gravel bars along the active channel, planting of obligate wetland species and riparian adapted native ornamental shrubs to create a parallel riverine wetland.
Pecos River near Pecos, NM – Casdagli
This project restored a section of the river, which was severely damaged by flooding in September, 2013. The project included full replacement of an existing irrigation diversion dam and headbox, installation of in-stream fish habitat structures, restoration of a river side channel as spawning habitat, installation of riparian and wetland plant species.
Mill Creek near Pagosa Springs, CO – Levine
Channel degradation and bank erosion from over-grazing and poor management of irrigation water had led to poor water quality conditions and a lack of riparian vegetation. Riverbend Engineering’s design provided a “two-tiered” channel and floodplain system, where typical irrigation driven low flows would sustain a smaller channel and floodplain inset into a larger channel and floodplain system. Riverbend’s design solution included narrowing and re- shaping of the active channel, grading of point bars and low floodplain areas, preventing bank erosion with rock piles and willow transplants. Grazing limitations were placed on the riparian zone, and new irrigation ditches were cut to better manage their water resources.
La Canada Dam near Angelfire, NM
Riverbend prepared an assessment report for the current condition of this dam. Riverbend’s work included: a limited topographic mapping effort to measure the size and shape of the embankment; inspection of active seepage areas, an assessment of the hazard classification of the dam, hydrologic calculations to determine the inflow design flood for the emergency spillway, prepare concept plans and cost estimates for potential rehabilitation projects.
Hidden Lake near Chama, NM
Riverbend Engineering completed a bathymetric survey of this high elevation lake. A Stage-Volume relationship was developed for the lake. Riverbend analyzed the hydrologic response of the watershed and calculated peak rates of runoff that would be expected in a 100-y event. Riverbend evaluated the hydraulic capacity of the existing spillway system, and made recommendations on how the capacity of the emergency spillway could be increased to meet current NM OSE standards.
East Fork San Juan River near Pagosa Springs, CO – East Fork Ranch
Wholesale removal of riparian vegetation by mechanical means in the 1930s left this 3.5 mile stretch of the upper San Juan River in an unstable condition. Decades later, the river had not achieved any stability, and emergent riparian vegetation was not able to establish. The client’s vision included full restoration of a single thread channel, an active floodplain, riffle/ pool structure in the river, and re-establishment of a wide riparian vegetation corridor. Riverbend designed a stream restoration to meet this vision. The River channel has been re-shaped to re-establish an appropriate meander pattern. Rock structures provide bank stability and encourage pool formation. Riparian vegetation transplant work has continued for several years. “Before” photo shows the unstable, braided river system; and the “After” photos shows how the river channel has been re-shaped to re-establish an appropriate meander pattern. Rock structures provide bank stability and encourage pool formation. Riparian vegetation transplant work has continued for several years.
Riverbend has a long history of working with local non-profit groups and national advocacy organizations. They have a vision, and we are able to help accomplish that vision with realistic designs, assistance in grant writing, cost-conscious construction and support for volunteers who take on monitoring and maintenance. Riverbend is committed to supporting organizations who advocate for the rivers and the watersheds in which they live.
>> Click for sample projects done for non-profit organizations
Rio de los Pinos south of Ortiz, CO – SMEG
This is a project of the San Miguel Ecological Group (SMEG) and is located upstream from the gauge at Ortiz, CO the Rio de los Pinos flows south into NM towards Chama. Historic overgrazing had led to poor riparian vegetation and an over-wide river channel. Riverbend Engineering’s design narrowed up the active channel, decreased the width to depth ratio, increased pool depth and increased in-stream fish habitat structure. The fish holding capacity has increased significantly.
Rio Grande near Alamosa, CO - RGHRP
The Rio Grande Headwaters Restoration Project and its outgrowth, the Colorado Rio Grande Restoration Foundation is interested in finding ways to improve the historical functions of the headwaters of the Rio Grande in Colorado. A river condition assessment was completed in 2001 of the first 91 miles (from the upstream town limits of South Fork to the Alamosa – Conejos County line) which resulted in a priority list of projects which are being done in phases. The first four phases have been completed, and more in planning and design phases. Also, Riverbend engineering has done a condition assessment study of the last ~35 miles from below the Alamosa Wildlife Refuge to the Colorado-New Mexico state line–download the 2016 final report here.
In the top study area (91 miles) The characteristics of the river are similar in all locations: low gradient, fine grained sediments, active bank erosion and limited woody riparian vegetation. And so, the restoration goals are similar at all of the sites: reduce bank erosion and improve riparian vegetation. By doing so, the health of the river is improved with better shade, reduced water temperatures, improved depth, better continuity of sediment movement and improved riparian habitat. The approach is to 1) flatten the river’s radius of curvature where the curvature gets too small; 2) install rock structures (rock deflectors) on the outside of the re-aligned bends that will resist lateral channel migration and reduce shear stress in the near bank region; and 3) encourage the establishment of a dense riparian vegetation colony on a new floodplain bench on the outside of these same meander bends, so that the vegetation can control the long-term bank stability and rate of erosion/lateral channel migration.
Pecos River near Pecos, NM – UPWA Hatchistery
Construction of several dams for an irrigation diversion had raised the water level by 8 ft, creating a sediment trap and a fish barrier. Riverbend Engineering conducted topographic and stream morphology surveys for the Upper Pecos Watershed Association (UPWA), and proposed a design for the active river channel that would be morphologically stable. The irrigation diversion intake was relocated upstream, reconstructed with large boulders and a sediment sluice was added to the headbox. A series of smaller grade control structures allow for a flatter overall river profile, restoring fish passage and improving sediment transport continuity.
Lower Blanco River near Pagosa Springs, CO – LBPOA
In the early 1970s a water diversion was constructed as part of the Colorado River Compact. This diversion takes water from the Blanco and the Navajo Rivers, and transfers that water to the Rio Grande watershed. The Blanco River below the diversion has seen a very limited quantity of water each year since the diversion was constructed. Riverbend’s goals for this project are to improve conditions in the river, making the best use of the remaining water in the channel. Riverbend’s design provided for a narrower channel to convey flows, as well as pool complexes to provide cooling. Restoration of this stretch of the Rio Blanco River was the Colorado Department of Public Health and Environment’s first CWA section 319-funded project aimed at addressing hydrologic modifications. In the last 15 years over 12-miles have been restored so the stream channel now matches the altered flow regime, and the landowners have been educated.
15 June 2011
La Plaza Ditch, off Embudo Creek, near Dixon, NM – Acequia de la Plaza
Riverbend Engineering designed this project and Rangeland Hands implemented construction and monitoring. Project involved removing the old diversion dam, which was a pile of small rocks and other debris, rebuilding the diversion weir with large boulders, and installing a steel headbox with a headgate and a sediment sluice.
Alamitos Creek near Moro, NM
Trout Unlimited (TU) was the project sponsor for design and construction of a fish barrier on Alamitos Creek in the Rio Pueblo drainage east of Sipapu. TU had identified a small population of pure Rio Grande cutthroat trout in this perennial stream. These fish had been protected from upstream migration of other salmonids by an old irrigation diversion structure, until a flood event destroyed that diversion structure. TU worked with the USFS and the local irrigation district to plan for a new fish barrier that would keep this native fish population isolated. To accomplish this project, TU’s national office and the Truchas TU Chapter obtained a Western Native Trout Initiative (WNTI) grant to construct the new fish barrier protecting of 7.5 stream miles. U.S. Forest Service personnel completed NEPA documentation and Riverbend provided engineering design and construction oversight for the project. Alamitos was a fast track project where stakeholders met in the Spring, environmental impact documentation was accomplished in the Summer and barrier construction was completed just before the onset of Winter. This project satisfied the WNTI Joint Venture’s goal of building, funding, and implementing collaborative conservation efforts.
Riverbend has worked as a subconsultant to a variety of corporations, some in the heavy construction industry and some in the environmental consulting industry. Our expertise in river restoration has helped many of these clients get a particular job, and get that job built successfully. We provide a strong resume and record of accomplishment in river work. We have the technical capability to fill a specific need, in what is often a much larger and complex project.
>> Click for sample projects done for corporations
White Salmon River at Condit Dam, WA
In south central Washington, ~ 3 river miles upstream from Columbia River confluence, near WA/ OR border Riverbend was hired (by J.R. Merit, Inc. Dam Removal General Contractor who was hired by PacifiCorp) to oversee the general contractor’s implementation of the environmental restoration aspects of this project. Riverbend was directly responsible for the evaluation and design of restoration features in the White Salmon River and its on-site tributaries, design of woody debris structures in the river, design of riparian area restoration, grading and stabilization of sediments left behind in the former reservoir. Riverbend’s subcontractors took care of all the water quality monitoring, and all the aerial photography and LiDAR mapping. Riverbend provided consulting engineering support for many other smaller tasks over the project’s duration, from designing a bypass water pipeline, to evaluating the stability of relic bridge structures in the river, exposed by the elimination of the reservoir. Condit Dam is the largest concrete dam to be removed in the US for environmental reasons. The dam removal was featured in Patagonia’s Dam Nation movie released spring 2014 (and edited from Ben Knight’s office in Telluride) Riverbend Engineering’s staff was on-site in full force for the for the epic explosive dam removal in October of 2012.
Rio Chama near Chama, NM – Cumbres & Toltec
The scope of work addressed stabilization of an eroding riverbank, threatening the south abutment of an historic railroad bridge. Riverbend designed the bank stabilization with large boulders. Riverbend handled the 404 and 401 permitting for the Cumbres & Toltec Railroad, and Riverbend directed the installation of the bank stabilization measures. Riverbend has also worked with the Cumbres & Toltec Railroad on the design of new railroad track at the Chama Depot, including rail extensions across the state highway.